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Sample records for atlanto-axial joint

  1. The investigation of the lateral atlanto-dental interval of atlanto-axial joint by multi-slice spiral CT

    International Nuclear Information System (INIS)

    Objective: To explore imaging features of the lateral atlanto-dental interval (LADI) of atlanto-axial joint and its value in the diagnosis of atlanto-axial joint dislocation/subluxation. Methods: Two hundred and forty healthy volunteers without atlanto-axial joint dysfunction and 32 patients with torticollis and/or functional impairment at atlanto-axial.joint were enrolled into this study. All subjects were examined with multi-slice CT in both neutral and max rotation positions to the left/right. Clinical endpoints including VBLADI, variance range of the VBLADI and asymmetric conditions were evaluate. χ2 test is used to evaluate the variance of incidence of bilateral LADI asymmetry in different age groups, Pearson-test (2-tailed) is used to evaluate the correlation between VBLADI and rotary function of atlanto-axial joint, precise test of fourfold table is used to compare normal group with patient groups. Results: (1) In the normal control group: asymmetry of bilateral LADI were observed in 204 among 240 (85.00%) healthy volunteers including 60 youngsters (95% of ∣ VBLADI ∣ were 0.850 mm, 2.450 mm in the young (95% in the young and in the adult respectively. There was no correlation between VBLADI(-2.146 to 2.114 mm, Median 0.000 mm) and LA (22.949° to 44.649°, Median 34.500°), RA (25.284° to 45.334°, Median 35.300°), VLRA (-11.643° to 8.623°, median 0.000°) respectively in normal people (r=-0.030, -0.005, 0.026, P>0.05). (2) In the study with 32 patients including 25 youngsters (95% in group AALSD and group AACD than in abnormal group (P<0.01), but there is no difference between group AARD and normal group (P=0.738). Conclusion: The imaging finding of 'asymmetry of bilateral LADI' may be either a physiological variation or a pathological condition, clinical manifestations and other imaging findings should be evaluated to make a diagnosis. (authors)

  2. 寰枢关节不对称、钩突增生与中青年颈性眩晕的相关性%Investigation of the relationship between atlanto-axial joint asymmetry, Luschka's joint hyperplasy and cervical vertigo in the middle age and youth

    Institute of Scientific and Technical Information of China (English)

    杨星; 乔俊霞; 付芳侠; 刘嵩

    2012-01-01

    Objective To investigate the relationship between atlanto-axial joint asymmetry, Luschka's joint hypcrplasy and cervical vertigo in the middle age and youth. Methods Two hundred and twenty-two patients with cervical vertigo in the middle age and youth were selected as the cervical vertigo group. Two hundred and three cases of the normal people were selected as the control group. All the subjects were taken mouth position and lateral X-ray photographs of cervical spine. Atlanto-axial joint asymmetry and Luschka's joint hypcrplasy were statistically evaluated by using correlation analysis. Results In the cervical vertigo group, 93. 24% (207/222) vertigo patients were atlanto-axial joint asymmetry. 23. 87% (53/222) patients were Luschka's joint hypcrplasy. In the control group, forty-eight cases were atlanto-axial joint asymmetry, accounting for 23. 65% of all unqualified. Sixty-five cases were Luschka's joint hypcrplasy, accounting for 32. 02% of all unqualified. Atlanto-axial joint asymmetry was negatively correlated with cervical vertigo in the middle age and youth (r=- 0.710, P0. 05). Conclusion Atlanto-axial joint asymmetry is negatively correlated with cervical vertigo in the middle age and youth. Atlanto-axial joint asymmetry is one of the main factors of cervical vertigo in the middle age and youth.%目的 探讨寰枢关节不对称、钩突增生与中青年颈性眩晕的相关性.方法 选取中青年颈性眩晕患者222例为眩晕组,无症状者203例为对照组.所有研究对象均摄取颈椎张口位及正侧位X线片,对其寰枢关节不对称及钩突增生情况做相关性分析.结果 颈性眩晕组中207例寰枢关节不对称,异常率93.24%;53例钩突增生,增生率23.87%.对照组中48例寰枢关节不对称,异常率23.65%;65例钩突增生,增生率32.02%.寰枢关节不对称与中青年颈性眩晕呈显著的负相关(r=-0.710,P<0.01);钩突增生与中青年颈性眩晕无相关性(r=0.091,P>0.05).结论 寰枢关节不

  3. Three-dimensional transient motion characteristics of atlanto-axial joint in healthy adults under physiological load%生理载荷下健康成人寰枢椎三维瞬时运动的特点

    Institute of Scientific and Technical Information of China (English)

    魏冬; 夏群; 苗军; 白剑强; 刘佳男; 李宏达

    2016-01-01

    with CT scan can obtain atlanto-axial three-dimensional instantaneous motion of six-DOF data of healthy adults, and found that the main motion of the C1-2 vertebrae is rotating. These data may provide us with some new information about the in vivo kinematics of the upper cervical spine and the non-fixed surgical operation.%背景:人体的颈椎是承载头颅和连接脊柱的重要结构,虽然是脊柱中体积最小,但是灵活性最大,活动频率最高的节段,同时也是人体几何形体和运动特性最为复杂的的骨性结构之一,承受了头部的生理负荷,还肩负着屈伸、侧弯、旋转等运动功能。因此,颈椎成为了人体脊柱最容易受到伤害和出现退行性病变的结构之一。而对颈椎特别是上颈椎生物力学的分析,认识和理解其正常的功能和力学机制,也将为更好的治疗上颈椎疾患提供理论基础。  目的:通过双荧光透视影像系统联合螺旋CT观察测定健康成年人生理载荷下寰枢椎在体三维瞬时运动特点。  方法:招募17名健康志愿者,采用双X射线透视影像系统和螺旋CT检查相结合技术,利用相关处理软件建模,并与双荧光透视影像系统捕获的X射线透视图像匹配,重现上颈椎三维瞬时运动状态,通过建立椎体几何中心坐标并进行测量,从而获得健康成人生理载荷下上颈椎在体三维瞬时运动学数据。  结果与结论:①前屈后伸时,C1-2节段与 C2-3节段在冠状轴位移、矢状轴位移和旋转角度差异有显著性意义;②左右侧屈时,C1-2节段旋转角度明显大于 C2-3节段。左右旋转时,C1-2节段与 C2-3节段在冠状轴位移、垂直轴位移,侧屈角度和旋转角度均有明显差异且有显著性意义;③说明双荧光透视影像系统联合螺旋 CT 测量能够获得健康成人寰枢椎在体三维瞬时运动六自由度数据,并发现寰枢椎活动以旋转运动

  4. Hypoplasia of the odontoid with atlanto-axial subluxation in Hurler's syndrome

    International Nuclear Information System (INIS)

    There appears to be an increased incidence of hypoplasia of the odontoid in Hurler's syndrome. As this predisposes to atlanto-axial subluxation, it should be sought in this mucopolysaccharidosis, as well as in Morquio's syndrome. (orig.)

  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. Atlanto-axial rotatory fixation in a girl with Spondylocarpotarsal synostosis syndrome

    Directory of Open Access Journals (Sweden)

    Grill Franz

    2006-10-01

    Full Text Available Abstract We report a 15-year-old girl who presented with spinal malsegmentation, associated with other skeletal anomalies. The spinal malsegmentation was subsequently discovered to be part of the spondylocarpotarsal synostosis syndrome. In addition, a distinctive craniocervical malformation was identified, which included atlanto-axial rotatory fixation. The clinical and the radiographic findings are described, and we emphasise the importance of computerised tomography to characterize the craniocervical malformation complex. To the best of our knowledge, this is the first clinical report of a child with spondylocarpotarsal synostosis associated with atlanto-axial rotatory fixation.

  7. Atlanto axial rotatory dislocation in adults: a rare complication of an epileptic seizure--case report.

    Science.gov (United States)

    Tarantino, Roberto; Donnarumma, Pasquale; Marotta, Nicola; Missori, Paolo; Viozzi, Ilaria; Landi, Alessandro; Delfini, Roberto

    2014-01-01

    Atlanto Axial Rotatory Dislocations (AARDs) are a heterogeneous group of post-traumatic pathologies typical of the pediatric age, and rare in adults. We describe the case of a 34-year-old woman, developing Atlanto Axial Rotatory Fixation (AARF) after a generalized tonic-clonic epileptic seizure, an extremely rare traumatic cause never described in literature. AARF was detected only 1 month after the accident and nonsurgical treatment was attempted at the beginning. The patient underwent surgery only 2 months after the accident. The best treatment should be conservative reduction within 1 month; when it is not possible, it is advisable to perform surgery as soon as possible. C1-C2 fixation with Harm's technique is the gold standard for fixed luxations. Delay of treatment makes intraoperative reduction more difficult and increase the establishment of the chronic permanent change of neck muscles and ligaments.

  8. Atlanto Axial Rotatory Dislocation in Adults: A Rare Complication of an Epileptic Seizure—Case Report

    Science.gov (United States)

    TARANTINO, Roberto; DONNARUMMA, Pasquale; MAROTTA, Nicola; MISSORI, Paolo; VIOZZI, Ilaria; LANDI, Alessandro; DELFINI, Roberto

    2014-01-01

    Atlanto Axial Rotatory Dislocations (AARDs) are a heterogeneous group of post-traumatic pathologies typical of the pediatric age, and rare in adults. We describe the case of a 34-year-old woman, developing Atlanto Axial Rotatory Fixation (AARF) after a generalized tonic-clonic epileptic seizure, an extremely rare traumatic cause never described in literature. AARF was detected only 1 month after the accident and nonsurgical treatment was attempted at the beginning. The patient underwent surgery only 2 months after the accident. The best treatment should be conservative reduction within 1 month; when it is not possible, it is advisable to perform surgery as soon as possible. C1–C2 fixation with Harm's technique is the gold standard for fixed luxations. Delay of treatment makes intraoperative reduction more difficult and increase the establishment of the chronic permanent change of neck muscles and ligaments. PMID:24201098

  9. Finite element analysis of biomechanical performance of atlanto-axial bony structure following artificial atlanto-odontoid joint arthroplasty%人工寰齿关节置换后寰枢椎骨性结构生物力学性能的有限元分析

    Institute of Scientific and Technical Information of China (English)

    胡勇; 袁振山; 赵红勇; 张美超; 顾勇杰

    2013-01-01

    Objective To investigate the stress characteristics of atlanto-axial bony structure under conditions of anteflexion,posterior extension,lateral flexion,and rotation after artificial atlanto-odontoid joint arthroplasty using three-dimensional finite element method and to improve the orientation of artificial atlantoodontoid joint from perspective of stress.Methods A three-dimensional finite element model of prosthetic atlanto-odontoid joint arthroplasty was created from CT images of the artificial atlantoodontoid joint and cervical vertebrae using software Mimics,Freeform,and Ansys.Stress characteristics of the model dealt with proneness,posterior extension,lateral flexion,or rotation loads were observed.Biomechanical performance of the bony structure of the model was analyzed and the orientation in improving the prosthesis was discussed.Results Anteflexion loading produced a maximum stress of 0.138 ×l08 N/m2 at the junction of lateral mass and posterior arch of the atlas,and 0.201 × 108 N/m2 at axial nail hole,contact point of plates with the axis,and posterior arch of the axis.Posterior extension loading produced a maximum stress of 0.666 × 107 N/m2 at junction of lateral mass and posterior arch of the atlas and 0.254 × 108 N/m2 at arch of the axis.Besides,stress concentration occurred at atlantoaxis nail hole.Right bending produced a maximum stress of 0.124 × 108 N/m2 at nail hole of right mass of atlas and 0.178 × 108 N/m2 at right contact point of the axis with plates.Right rotation produced a maximum stress of 0.847 × 107 N/m2 at junction of lateral mass and posterior arch of the atlas and 0.170 × 109 N/m2 at contact point of the axis with plates.The finite element model comprised 28 620 nodes and 107 441 units and provided good defining of the structural properties of artificial atlanto-odontoid joint arthroplasty.Under different loading conditions,the stress was mainly distributed in contact point of the vertebral body with plates,nail holes

  10. Retro-odontoid ''ghost'' pseudotumours in atlanto-axial instability caused by rheumatoid arthritis

    Energy Technology Data Exchange (ETDEWEB)

    Kenez, J. (Dept. of Neurology, Semmelweis Medical Univ., Budapest (Hungary)); Turoczy, L. (Dept. of Neurosurgery, National Inst. of Traumatology, Budapest (Hungary)); Barsi, P. (Dept. of Neurology, Semmelweis Medical Univ., Budapest (Hungary)); Veres, R. (Dept. of Neurosurgery, National Inst. of Traumatology, Budapest (Hungary))

    1993-05-01

    Among 27 cases of marked atlanto-axial instability investigated in the last 10 years we found three with reducible dislocation, in which a cystic 'ghost' pseudo-tumours appeared behind the odontoid, maintaining cord compression even in the reduced position, thus influencing the strategy of operative treatment. The cervical spine and the craniocervical region were examined by conventional tomogrpaphy, myelotomography, CT, CT myelography (following melography), and recently in some cases with MRI. (orig./UWA)

  11. The finite element analysis and clinical significance of through the mouth atlanto-axial vertebral anterior plate fixation

    Institute of Scientific and Technical Information of China (English)

    LI Xiaohe; LI Zhijun; GAO Shang

    2015-01-01

    Objective:To analysis through the mouth atlanto-axial vertebral anterior plate fixation in finite element for the development of the segmental anterior fixation surgery and to provide the reference of inner plant im-provement. Methods:One case, male, 36 years old, 64 kg weight was randomly selected from January 2014 to our hospital to check no-skull - atlanto-axial vertebral disease . It was scanned by 0. 625 mm thin layer, Image data were rebuilted in the Mimics 16. 01 software, Pro/ENGINEER 4. 0 software was used to rebuilt atlanto-axial vertebral anterior plate, After reconstruction of steel screw 3 d model according to the classic through the mouth , the model was imported into Mimics 16. 01 and the model surface was meshed and material was assigned, The mod-el was forced 80 N vertical loading, the surface was applied 15 nm torque, to simulat three motion state example, forward bends, stretch, side-bending, The stress and deformation of screw and rod were measured. Results: At-lanto-axial vertebral three-dimensional reconstruction model were divided into 14 514 individual grid, 7 257 nodes, the model was loaded, The stress of upper screw root in bend was biggest (62. 34 ±5. 52) Mpa (F=73. 23, P<0. 05, the difference was statistically significant). A screw of the root and the top, lateral stress was the largest, respectively were (78. 42 ± 5. 5. 14) Mpa (F=112. 32, P<0. 05);(95. 48 ± 7. 12 Mpa (F=62. 32, P<0. 05), the difference was statistical significance; Under three different motion state and a screw root stress, Upper screw root stress in bending forward was greater than the lower (forward bends, stretch and lateral bending state , t value were 12. 2, 9. 23, 22. 98, P<0. 05, differences were statistically significant), and in the lateral current screw root stress was greater than the upper; In the same movement state, the top was greater than the root, the differences were statistically significant (forward bends, stretch and lateral bending state after

  12. Condylus tertius with atlanto-axial rotatory fixation: an unreported association

    International Nuclear Information System (INIS)

    The ''condylus tertius'' or the ''third occipital condyle'' is an embryological remnant of the proatlas sclerotome. Anatomically, it is attached to the basion and often articulates with the anterior arch of the atlas and the odontoid apex; hence, it is also called the ''median occipital condyle''. It is a rare anomaly of the cranio-vertebral junction (CVJ) that can lead to instability and compression of important surrounding neurovascular structures. We report a case of a 16-year-old boy who presented with suboccipital neck pain, torticollis and right sided hemiparesis. Plain radiographs revealed an increased atlanto-dental interspace (ADI) with a retroflexed odontoid. Open mouth view showed asymmetry of the articular processes of the atlas with respect to the dens. Computed tomography (CT) of the CVJ delineated the third occipital condyle. Furthermore, on dynamic CT study, a type 3 atlanto-axial rotatory fixation (AARF) was clearly demonstrated. Magnetic resonance imaging (MRI) of the CVJ revealed severe right-sided spinal cord compression by the retroflexed and rightward deviated dens. It also revealed disruption of the left alar and transverse ligaments. The patient was treated with 8 weeks of cranial traction and reasonable alignment was obtained. This was followed by C1-C2 lateral mass screw fixation and C1-C2 interlaminar wiring to maintain the alignment. A review of the literature did not reveal any cases of condylus tertius associated with non-traumatic AARF. An accurate knowledge of the embryology and imaging features of this rare CVJ anomaly is useful in the prompt diagnosis and management of such patients. (orig.)

  13. Condylus tertius with atlanto-axial rotatory fixation: an unreported association.

    Science.gov (United States)

    Udare, Ashlesha Satish; Bansal, Divya; Patel, Bhavin; Mondel, Prabath Kumar; Aiyer, Siddharth

    2014-04-01

    The "condylus tertius" or the "third occipital condyle" is an embryological remnant of the proatlas sclerotome. Anatomically, it is attached to the basion and often articulates with the anterior arch of the atlas and the odontoid apex; hence, it is also called the "median occipital condyle". It is a rare anomaly of the cranio-vertebral junction (CVJ) that can lead to instability and compression of important surrounding neurovascular structures. We report a case of a 16-year-old boy who presented with suboccipital neck pain, torticollis and right sided hemiparesis. Plain radiographs revealed an increased atlanto-dental interspace (ADI) with a retroflexed odontoid. Open mouth view showed asymmetry of the articular processes of the atlas with respect to the dens. Computed tomography (CT) of the CVJ delineated the third occipital condyle. Furthermore, on dynamic CT study, a type 3 atlanto-axial rotatory fixation (AARF) was clearly demonstrated. Magnetic resonance imaging (MRI) of the CVJ revealed severe right-sided spinal cord compression by the retroflexed and rightward deviated dens. It also revealed disruption of the left alar and transverse ligaments. The patient was treated with 8 weeks of cranial traction and reasonable alignment was obtained. This was followed by C1-C2 lateral mass screw fixation and C1-C2 interlaminar wiring to maintain the alignment. A review of the literature did not reveal any cases of condylus tertius associated with non-traumatic AARF. An accurate knowledge of the embryology and imaging features of this rare CVJ anomaly is useful in the prompt diagnosis and management of such patients. PMID:24150830

  14. Condylus tertius with atlanto-axial rotatory fixation: an unreported association

    Energy Technology Data Exchange (ETDEWEB)

    Udare, Ashlesha Satish [M.G.M. Hospital, Department of Radiology, Kamothe, Navi Mumbai (India); Global Hospital Super Speciality and Transplant Centre, Department of Radiology, Mumbai (India); Navi Mumbai, Maharashtra (India); Bansal, Divya; Patel, Bhavin [M.G.M. Hospital, Department of Radiology, Kamothe, Navi Mumbai (India); Mondel, Prabath Kumar [P.D. Hinduja Hospital, Department of Radiology, Mahim, Mumbai (India); Aiyer, Siddharth [Shatabdi Hospital, Department of Orthopedics, Chembur, Mumbai (India)

    2014-04-15

    The ''condylus tertius'' or the ''third occipital condyle'' is an embryological remnant of the proatlas sclerotome. Anatomically, it is attached to the basion and often articulates with the anterior arch of the atlas and the odontoid apex; hence, it is also called the ''median occipital condyle''. It is a rare anomaly of the cranio-vertebral junction (CVJ) that can lead to instability and compression of important surrounding neurovascular structures. We report a case of a 16-year-old boy who presented with suboccipital neck pain, torticollis and right sided hemiparesis. Plain radiographs revealed an increased atlanto-dental interspace (ADI) with a retroflexed odontoid. Open mouth view showed asymmetry of the articular processes of the atlas with respect to the dens. Computed tomography (CT) of the CVJ delineated the third occipital condyle. Furthermore, on dynamic CT study, a type 3 atlanto-axial rotatory fixation (AARF) was clearly demonstrated. Magnetic resonance imaging (MRI) of the CVJ revealed severe right-sided spinal cord compression by the retroflexed and rightward deviated dens. It also revealed disruption of the left alar and transverse ligaments. The patient was treated with 8 weeks of cranial traction and reasonable alignment was obtained. This was followed by C1-C2 lateral mass screw fixation and C1-C2 interlaminar wiring to maintain the alignment. A review of the literature did not reveal any cases of condylus tertius associated with non-traumatic AARF. An accurate knowledge of the embryology and imaging features of this rare CVJ anomaly is useful in the prompt diagnosis and management of such patients. (orig.)

  15. Congenital Absence of Posterior Elements of C2 Vertebra with Atlanto-Axial Dislocation and Basilar Invagination: A Case Report and Review of Literature.

    Science.gov (United States)

    Srivastava, Sudhir Kumar; Nemade, Pradip Sharad; Aggarwal, Rishi Anil; Bhoale, Sunil Krishna

    2016-02-01

    Developmental anomalies of the axis are commonly encountered, especially anomalies involving the odontoid process. Anomalies of the posterior elements are uncommon. We describe a unique case of agenesis of posterior elements of C2 with basilar invagination and atlanto-axial dislocation. An obese 8-year-old boy presented with symptoms of cervical myelopathy. Radiological workup revealed a craniovertebral junction anomaly with occipitalised atlas, absent posterior elements of axis, and hypertrophied C3 spinous process. Atlanto-axial instability and basilar invagination was present. Magnetic resonance angiography revealed hypoplastic left vertebral artery. Traction with cervical tongs failed to improve the alignment and symptoms. Anterior trans-oral release, followed by posterior decompression and custom-made instrumentation, was done. The patient recovered completely and was asymptomatic at the end of two years. X-ray and computed tomography scan demonstrated reduction of basilar invagination and maintenance of alignment. This is the first case to be reported of agenesis of posterior elements of axis associated with basilar invagination. One should look for this condition in patients with hypertrophied spinous process of C3. Utilization of hypoplastic pedicle of axis serves as an additional fixation point to increase the stability of the construct. PMID:26949474

  16. 寰枢椎脱位术中复位技术及内固定的研究进展%Intraoperative reduction and internal fixation for atlanto-axial dislocation

    Institute of Scientific and Technical Information of China (English)

    武乐成; 倪斌

    2016-01-01

    寰枢椎复合体是颈椎中最重要的功能单位.寰枢关节失稳或脱位,是脊柱外科的急重症之一.临床上多通过后路寰枢椎融合术重建寰椎复合体的稳定性.寰枢椎后路融合技术的发展经历了钢丝或钛缆捆扎固定、椎板夹固定、经寰枢关节螺钉固定、以及后来的钉板固定和钉棒固定等过程.对于术前牵引未能复位者,需进行术中复位.本文主要就以上术中复位技术和内固定方法进行综述.%Atlanto-axial complex is the most important functional unit of the cervical spine.Atlanto-axial instability or dislocation,one of the most serious pathologies in spinal surgery,is often managed by posterior atlantoaxial fixation and fusion.Several posterior fixation techniques have been used to stabilize the atlanto-axial complex,including wire/cable-bone fixation,Halifax clamps,transarticular screw fixation,screw-plate fixation and screw-rod fixation.For atlanto-axial dislocation that cannot be reduced with skull traction before operation,intraoperative reduction is often needed.Current intraoperative reduction techniques can be classified into transoropharyngeal surgical release followed by posterior reduction and fixation,transoropharyngeal reduction and fixation,and posterior reduction and fixation using screw-rod system according to approaches.Furthermore,posterior reduction can be performed using elevating-pull,leverages,and cantilever techniques.This study reviews the intraoperative reduction and fixation techniques mentioned above.

  17. 儿童寰枢椎脱位合并颈脊髓压迫%Atlanto-axial Dislocation Associated with Compression of Cervical Spinal Cord in Children

    Institute of Scientific and Technical Information of China (English)

    刘洪奎; 贾连顺; 徐印坎

    1986-01-01

    This paper reports five children suffering from atlantoaxial dislocation due to trauma of cervical vertebrae,congenital abnormality of atlas,dysptasia or defects of os odontoideum and other diseases.As conservative therapy,traction and cervical support treatment all.failed and cervical spinal cord compression symptom gradually appeared,such as spasmotic palsy of lower limbs (2 cases),weak and unstable gait (3),so a procedure of resection of posterior arch of atlas and occipito-cervical fusion was performed.Follow-ups carried on 6 to 60 months after operation showed that satisfactory results were achieved in 4 cases,disappearance of lower limb spasm in 2 cases,4 children went back to school and only one died from other cause.The operative technique is described as well as its indications,choice of operation time and the modified occipitocervical fusion.The authors also point out that in children once atlanto-axial dislocation is found to be associated with cervical spinal cord compression,operation should be imminent and the result will be good.%@@ 寰枢椎由于先天发育不良、畸形、外伤或疾患引起不稳定者并非少见,此位置的关节不稳定比脊柱任何部位的关节不稳定更为危险,并有脊髓压迫症状时可导致四肢瘫痪或突然死亡~((1、2)),儿童期寰枢椎不稳定,保守治疗可能得到治愈,而需要行寰椎后弓切除减压及枕颈融合者极少.

  18. Atlanto-Axial Instability in People with Down’s Syndrome and its Impact on the Ability to Perform Sports Activities – A Review

    Directory of Open Access Journals (Sweden)

    Myśliwiec Andrzej

    2015-12-01

    Full Text Available Atlanto-axial instability (AAI is a developmental anomaly often occurring in persons with Down’s syndrome (DS. According to various reports, AAI affects from 6.8 to 27% of the population with DS. The aim of this review was to illustrate the issue of AAI with regard to the progressively changing state of scientific knowledge. The extended distance between the rear surface of the frontal arcus of the C1 cervical vertebra and the anterior surface of C2 cervical vertebra dens (anterior atlanto-odontoid distance, AAOD indicates the occurrence of AAI and is detectable through X-ray examination. Hypoplasia of the C2 dens, also detectable through X-ray examination, is another suggested risk factor for AAI. According to current data, the methodology of taking measurements is inconsistent, which leads to errors in interpretation. As research focusing on AAI was progressing, new data emerged from other studies on persons with DS, suggesting that neurological symptoms in persons with DS that indicated the occurrence of spinal cord compression were an important factor in medical imaging detection of AAI. One of the main arguments supporting this thesis is that in isolated cases spinal cord (SC damage was noted during screening examinations conducted on a large population of subjects. Moreover, cases in which the neurological symptoms indicate spinal cord compression existed long before the occurrence of the actual damage also remain of significant importance. Therefore, it is necessary to promote neurological studies on persons with DS to enable early diagnosis of spinal cord compression and, at the same time, reduce the use of medical imaging in cases of neurological symptoms.

  19. 寰枢椎椎弓根钉内固定重建上颈椎不稳%Atlanto-axial pedicle screw internal fixation to reconstruct upper cervical spine instability

    Institute of Scientific and Technical Information of China (English)

    杨飞; 武永刚; 赵敏; 贾卫斗; 云得才; 王建华

    2010-01-01

    目的 探讨寰枢椎椎弓根钉内固定融合重建上颈椎不稳的临床疗效.方法 采用寰枢椎椎弓根钉内固定自体髂骨植骨治疗上颈椎不稳患者21例,其中Ⅱ型齿状突骨折13例,齿状突不连5例,横韧带损伤3例.在寰枢椎后弓间植骨融合,使寰枢椎复合体得到稳定.结果 共置入84枚螺钉,术中2枚螺钉穿破寰椎左侧椎弓根外侧壁,未发生脊髓、椎动脉损伤.所有患者X线片示寰椎完全复位,枢椎齿状突骨折处复位良好.CT片示螺钉与椎动脉及脊髓位置关系良好.按JOA评分标准,优15例,良3例,可2例,差1例,优良率85.71%(18/21).17例患者获得随访,随访时间12~26(12.83±4.23)个月,均获得骨性融合,未发现钉板断裂.结论 寰枢椎椎弓根螺钉结合钉板系统固定重建上颈椎不稳能显著增强寰枢椎间生物力学稳定性,植骨融合率高,该术式在寰枢椎融合术中具有较高的推广应用价值.%Objective To explore the clinical effect of the atlanto-axial pedicle screw internal fixation to reconstruct upper cervical spine instability. Methods Using atlanto-axial pedicle screw and internal fixation system combined with autogenous iliac bone graft to treat 21 patients with upper cervical spine instability. Type Ⅱ odontoid process old fracture was 13 patients, odontoid process nonunion was 5 patients, injury of the transverse ligament was 3 patients. They were placed in 84 atlanto-axial pedicle screws, autogenous bones were placed in the posterior arch of atlas and axis to fusion, so that atlanto-axial complex got stabilized. Results The left lateral cortical bone of atlas vertebral pedicle was broken by screws in 2 patients, but the spinal cord and vertebral artery was intact. X-ray film showed the atlas and the fracture of dens of axis was completely replaced in all patients. The position of screw and vertebral artery or spinal cord was good in CT image. According to JOA score standard, 15 cases of all were

  20. 寰枢椎脱位与不稳定388例住院病例分析%Clinical analysis of 388 cases of atlanto-axial instability

    Institute of Scientific and Technical Information of China (English)

    周海涛; 党耕町; 王超

    2001-01-01

    目的分析不同原因引起的寰枢椎脱位与不稳定的特点,为诊断、治疗的改进提供参考.方法对1975年1月~2000年4月收治的寰枢椎脱位或不稳定患者388例作回顾性分析.结果寰枢椎发育异常引起的寰枢椎脱位262例,创伤性寰枢椎脱位71例,其他原因55例.发育异常中骨性畸形238例,包括枢椎齿突发育异常、寰椎枕化、颅底凹陷等,以单纯枢椎齿突畸形最为多见,但出现脊髓损害的比例没有显著性差异.随着病史的延长出现脊髓损害的可能性增加,出现重症脊髓损害的可能性也明显增加.陈旧性骨折比新鲜骨折复位更困难.陈旧性骨折(35例)中有19例伤后脊髓损害加重.伤后超过1年的陈旧性骨折患者,症状加重的发生率明显高于病史不足1年者.结论畸形等发育性异常导致寰枢椎脱位与不稳定比创伤性原因更常见,一旦出现临床症状应积极治疗.创伤性寰枢椎脱位患者应早期积极治疗,避免晚期脊髓损害加重.%Objective To study the clinical characteristics of atlanto-axial dislocation and instability caused by different reasons. Methods 388 cases of atlanto-axial dislocation and instability admitted between Jan 1975 and Apr 2000 were reviewed retrospectively. Results 262 cases were caused by anomaly, 71 by trauma and 55 by other reasons. 238/262 had bony deformity, including anomaly of odontoid process, atlanto-occipital assimilation, skull basilar invagination and some others. Simple anomaly of odontoid was the most commonly seen etiology. Myelopathy occurred at similar morbidity among each kind of patients. But patients who presented symptoms for longer time were more likely to have myelopathy. It is difficult to reduce chronic fractures of the odontoid process compared with the fresh fractures. 19 cases with chronic fracture suffered from severe myelopathy. Patients with chronic atlanto-axial fracture over 1 year were more likely to have secondary damage

  1. 经口寰枢椎前路钢板固定有限元分析及临床意义%The finite element analysis and clinical significance of through the mouth atlanto-axial vertebral anterior plate fixation

    Institute of Scientific and Technical Information of China (English)

    王海燕; 张琪; 李筱贺; 李志军; 高尚; 张少杰; 王星; 蔡永强; 王志强; 马界荣

    2015-01-01

    Objective To analyze through the mouth atlanto-axial vertebral anterior plate fixation in finite element for the development of the segmental anterior fixation surgery and to provide the reference of inner plant improvement. Methods One case, male, 36 years old, 64 kg weight was randomly selected in January 2014 in our hospital, whom was excluded of the skull-atlanto-axial vertebral disease. The patient received scanning with a thickness of 0.625 mm;Image data were rebuilt in the Mimics16.01 software and Pro/ENGINEER4.0 software was used to rebuild the atlanto-axial vertebral anterior plate. After reconstruction of steel screw 3D model according to the classic through the mouth,the model was imported into Mimics16.01 and the model surface was meshed and material assigned. The model was then imported into Ansys14.0, and was forced 80 N vertical loading. The surface was applied 15 Nm torque to simulate three-motion state example, forward bends, stretch, side-bending. The stress and deformation of screw and rod were measured. Results Atlanto-axial vertebral three-dimensional reconstruction model were divided into 39842 individual grid and the model was loaded. The stress of upper screw root in bend was biggest (62.34 ± 5.52) Mpa (F=73.23, P<0.05, the difference was statistically significant).A screw of the root and the top, lateral stress was the largest, respectively were (78.42 ± 5.5.14) Mpa (F=112.32, P<0.05);(95.48 ± 7.12)Mpa (F=62.32, P<0.05), the difference had statistical significance; Under three different motion state and a screw root stress, Upper screw root stress in bending forward was greater than the lower (forward bends, stretch and lateral bending state , t value were 12.2, 9.23, 22.98, P<0.05, differences were statistically significant), and in the lateral current screw root stress was greater than the upper;In the same movement state, the top was greater than the root, the differences were statistically significant (forward bends, stretch and

  2. The characteristics of bony ankylosis of the facet joint of the upper cervical spine in rheumatoid arthritis patients

    OpenAIRE

    Iizuka, Haku; Nishinome, Masahiro; Sorimachi, Yasunori; Ara, Tsuyoshi; Nakajima, Takashi; Iizuka, Yoichi; Takagishi, Kenji

    2009-01-01

    This study investigated the bony ankylosis of the upper cervical spine facet joints in patients with a cervical spine involvement due to rheumatoid arthritis (RA) using computed tomography (CT) and then examined the characteristics of the patients showing such ankylosis. Forty-six consecutive patients who underwent surgical treatment for RA involving the cervical spine were reviewed. The radiographic diagnoses included atlanto-axial subluxation in 30 cases, vertical subluxation (VS) in 10 cas...

  3. 后路寰枢椎固定融合术患者围术期的护理%Perioperative nursing of posterior internal fixation and fusion for atlanto-axial instability

    Institute of Scientific and Technical Information of China (English)

    王文慧

    2012-01-01

    目的 探讨上颈椎不稳患者经后路寰枢椎椎弓根钉棒固定融合术围术期的护理方法.方法 对12例上颈椎不稳患者术前做好心理护理,保持有效的颅骨牵引及头-胸环固定牵引,术后严密监测生命体征,预防脊髓水肿,观察切口及引流情况,保持正确体位和正确穿戴头颈胸支具,鼓励早期离床活动,重视并发症观察和出院指导.结果 12例患者均顺利度过围术期,未出现术后并发症,患者临床症状缓解或消失,且均能较早下床活动.结论 精心的围术期护理是手术成功的重要保障,可改善患者术后的生活质量.%Objective To study the peri-operative nursing care method in patients with upper cervical spine instability with posterior atlanto-axial pedicle screw-rod fixation and fusion. Methods 12 patients were give preoperative psychological nursing of upper cervical instability, mintain effective chest and head-skull traction collar traction, vital signs was closely monitored after surgery to prevent spinal cord edema, incision and drainage were observed, the correct posture and correct wearing of head and neck chest brace were mintained, the early off-bed activities were encouraged and complications and discharge instructions were attented. Results 12 cases patients were navigated the perioperative without postoperative complications, clinical symptoms eased or disappeared, and were able to out of bed activity early. Conclusion Perioperative nursing care of carefully is important guarantee of successful operation, which can improve the quality of life in postoperative patients.

  4. THE APPLICATION OF LATERAL ATLANTO-DENTAL INTERVAL OF ATLANTO-AXIAL JOINT IN FORENSIC MEDICINE%寰枢关节齿突侧块间隙在法医学中的应用

    Institute of Scientific and Technical Information of China (English)

    郭健; 郝大鹏; 王松松

    2015-01-01

    目的 探讨寰枢关节齿突侧块间隙在法医学鉴定中的意义.方法 收集无寰枢关节病变的健康志愿者(对照组)230例和临床确诊的寰枢关节半脱位病人(病例组)52例.两组均行螺旋CT容积扫描(MSCT)检查.对两组双侧齿突侧块间隙和寰齿前间隙进行测量和比较.结果 对照组双侧齿突侧块间隙不对称者204例,对称者26例;病例组不对称者50例,对称者2例,差异无统计学意义(P>0.05).对照组寰齿前间隙均在正常范围之内,病例组则均超过正常范围,两组比较差异有显著性(x2 =3.19,P<0.05).结论 双侧齿突侧块间隙不对称在法医学鉴定中不能作为寰枢关节半脱位的依据,寰齿前间隙可以作为其诊断较为准确的影像学指标,同时应结合临床表现和其他影像征象综合分析.

  5. Clinical Effect of Blade Needle Treatment for Cervical Vertigo Caused by Atlanto-axial Joint Disorder%刃针治疗寰枢关节紊乱所致颈性眩晕临床研究

    Institute of Scientific and Technical Information of China (English)

    房连强; 谭朝坚; 李霞; 李里; 黄艾; 刘智

    2013-01-01

    Objective To observe the clinical effect of blade needle treatment combined with myofascial trigger point (MTrP) therapy in the treatment of cervical vertigo. Methods Eighty-four patients with cervical vertigo were randomly divided into treatment group (n= 42) and control group (n=42). The treatment group received blade needle treatment combined with MTrP therapy, while the control group mainly received filiform needle acupuncture at cervical Jiaji points; both groups underwent Long's bone-setting manipulation after treatment. The clinical effects were evaluated after 2-week treatment (5 times). Results The treatment group had a significantly higher overall response rate than the control group (Z= -2. 453, P<0. 014). Compared with the control group, the treatment group had significantly higher vertigo symptom and function scores and mean blood flow velocity of the vertebrobasilar artery and significantly lower odontoid growth offset value (DO) and bilateral odontoid lateral mass spacing difference (VBLADI) (P<0. 05 or P<0. 01). Conclusion Blade needle treatment combined with MTrP therapy can lead to significant improvements in treatment outcome, blood flow velocity, and cervical vertigo symptoms and functions in patients with cervical vertigo.%目的 观察刃针结合肌筋膜激痛点(myofascial trigger point,MTrP)原理治疗颈性眩晕的临床疗效.方法 将84例颈性眩晕患者随机分为治疗组42例,对照组42例.治疗组采用刃针结合MTrP原理治疗,对照组用毫针针刺颈夹脊穴为主治疗,两组治疗后均予龙氏正骨手法治疗,治疗2周后(共治疗5次)统计疗效.结果 治疗组临床疗效显著优于对照组(Z=-2.453,P<0.014);在提高眩晕症状和功能评分及椎-基底动脉平均血流速度方面,以及在降低齿突生长性偏移(odontoid growth offset value,DO)、双侧齿突侧块间距差(bilateral odontoid lateral mass spacing difference,VBLADI)方面,治疗组显著优于对照组(P<0.05,或P<0.01).结论 刃针结合MTrP原理治疗颈性眩晕在提高临床疗效、改善血流速度、缓解颈性眩晕症状及恢复功能等方面均有明显的优势.

  6. Quantitative anatomic study of atlanto-odontoid joint and design of an artificial atlanto-odontoid joint for the orthopedic clinic

    Institute of Scientific and Technical Information of China (English)

    HU Yong; YANG Shu-hua; XIE Hui; XU Rong-ming; MA Wei-hu

    2007-01-01

    Objective: To observe and measure morphological parameters of the Chinese atlanto-odontoid joint anatomically in order to provide an anatomic data for designing artificial atlanto-odontoid joint used for substituting the destroyed atlanto-odontoid joint in the orthopedic clinic. Methods: The relative anatomic parameters of 32 sets of fresh Chinese adults'atlanto-odontoid joint specimens were measured with a digital caliper and a goniometer, including the width of anterior arch of atlas (AW), the thickness of atlas at the junction of anterior arch and lateral mass (AD), the thickness and height of anterior tubercle of atlas (AT and AH), the middle height, length and width of the lateral mass (MHL, L and LW), the height, transverse and anteroposterior distance of odontoid process(DH, DW and DD), the retroversion angle of odontoid process (β°),the facial angle of odontoid process (θ°)and so on. The data were statistically analyzed in order to ascertain the morphological parameter ranges of artificial atlanto-odontoid joint. An artificial atlanto-odontoid joint was designed according to these data. The operations of anlanto-odontoid joint arthroplasty were conducted in 3 cases of adult cadaver specimens. Results: The width of AW was (20.45±1.53)mm, AD (3.91±1.32)mm, AT and AH (9.43±1.93)mm and(10.23±1.32)mm, respectively, MHL and LW (13.68±1.38)mm and (12.98±1.52)mm, respectively, DH (15.25±2.11)mm, DW and DD (9.69±1.38)mm and(11.26±1.02)mm, respectively, β°(12.23±4.27) degree, θ°(65.48±2.17) degree. The prosthesis was composed of atlas part, axis part and accessories. Neither the vertebral artery nor the medulla oblongata was injured. Conclusions: The design of artificial atlanto-odontoid joint is feasible according to these parameters. The artificial joint can not only rebuild the stability of atlanto-axial joint, but also reserve the rotation function between atlas and axis. Every part of the joint has their own parameter ranges in purpose to firm

  7. The Anatomic Study on Replacement of Artificial Atlanto-odontoid Joint through Transoral Approach

    Institute of Scientific and Technical Information of China (English)

    Yong Hu; Shuhua YANG; Hui XIE; Xianfeng HE; Rongming XU; Weihu MA; Jianxiang FENG; Qiu CHEN

    2008-01-01

    In order to provide anatomical basis for transoral approach (TOA) in dealing with the ventro lesions of craniocervical junction, and the design and application of artificial atlanto-odontoid joint, microsurgical dissecting was performed on 8 fresh craniocervical specimens layer by layer through transoropharyngeal approach. The stratification of posterior pharyngeal wall, course of vertebral artery, adjacent relationship of atlas and axis and correlative anatomical parameters of replacement of artificial atlanto-odontoid joint were observed. Besides, 32 sets of atlanto-axial joint in adults' fresh bony specimens were measured with a digital caliper and a goniometer, including the width of bony window of anterior arch of atlas, the width of bony window of axis vertebra, the distance between superior and inferior two atlas screw inserting points, the distance between two axis screw inserting points etc. It was found that the width of atlas and axis which could be exposed were 40.2±3.5mm and 39.3±3.7mm respectively. The width and height of posterior pharyngeal wall which could be exposed were 40.1±5.2mm and 50.2±4.6mm respectively. The distance between superior and inferior two atlas screw inserting points was 28.0±2.9mm and 24.0±3.5mm respectively, and the distance of bilateral axis screw inserting points was 18.0±1.2mm. The operative exposure position through TOA ranged from inferior part of the clivus to the superior part of the C3 vertebral body. Posterior pharyngeal wall consisted of 5 layers and two interspaces: mucosa, submucosa, superficial muscular layer, anterior fascia of vertebrae, anterior muscular layer of vertebrae and posterior interspace of pharynx, anterior interspace of vertebrae. This study revealed that it had the advantages of short operative distance, good exposure and sufficient decompression in dealing with the ventro lesions from the upper cervical to the lower clivus through the TOA. The replacement of artificial atlanto-odontoid joint

  8. Atlanto-Axial Malformation and Instability in Dogs with Pituitary Dwarfism due to an LHX3 Mutation

    NARCIS (Netherlands)

    Voorbij, A M W Y; Meij, B P; van Bruggen, L W L; Grinwis, G C M; Stassen, Q E M; Kooistra, H S

    2015-01-01

    BACKGROUND: Canine pituitary dwarfism or combined pituitary hormone deficiency (CPHD) in shepherd dogs is associated with an LHX3 mutation and can lead to a wide range of clinical manifestations. Some dogs with CPHD have neurological signs that are localized to the cervical spine. In human CPHD, cau

  9. [C1-C2 transarticular screw fixation of atlanto-axial instability with tetraparesis in rheumatoid patient--case report].

    Science.gov (United States)

    Chrzanowska, Anetta; Chrzanowski, Robert; Skura, Antoni

    2010-01-01

    A case of a 50-year-old patient with C1-C2 subluxation and concomitant neurological deficits in the course of rheumatoid arthritis has been described. In the article the diagnostic and therapeutic procedures, consisting mainly of surgical treatment, have been presented. Indications for the surgery were: a rapid disease progression observed during the last six months, and tetraparesis. The authors propose the choice of applied surgical technique by taking into account difficulties consequential to the anatomy of this region, as well as additional complications regarding the chronic inflammation process. The use of transarticular screw fixation method, together with concurrent spinal cord decompression allowed the stabilization of C1-C2 subluxation and improvement of the neurological state of the patient. PMID:21591367

  10. The radiologic spectrum of occipital condyle fractures

    International Nuclear Information System (INIS)

    Full text: Occipital condyle fractures (OCFs) are increasingly diagnosed in survivors of high energy blunt trauma, and may be associated with craniocervical junction disruption.We aimed to describe and classify the imaging appearances of occipital condyle fractures in a large series of trauma patients. We reviewed conventional radiographs, computed tomography (CT), and magnetic resonance (MR) imaging in 95 patients with 107 OCFs, who were treated at a level 1 trauma centre (1992-1999). We described fracture patterns according to two current classification systems (Anderson and Montesano, and Tuli), and correlated imaging appearances with clinical findings, neurosurgical management and patient outcome. Fracture morphology and craniocervical junction integrity were best assessed by 1-1.5mm collimation CT. Inferomedial occipital condyle avulsion fractures (Anderson and Montesano type III) were the commonest OCF category, comprising 80/107 (75%). Unilateral OCFs were found in 73/95 (77%) patients, 58 of whom were managed by cervical orthotic brace or collar. Bilateral OCFs or occipito-atlanto-axial joint injuries were seen in the remaining 22/95 (23%) patients. Occipitocervical fusion or craniocervical halo traction were required in 12 patients, all of whom had CT evidence of bilateral occipito-atlanto-axial joint disruption. Associated cervical spine injuries were present in 29/95 (31%) patients. Ten (10/95, 10.5%) patients died in hospital, and 30/95 (32%) showed continuing disability. The remaining 55/95 (57.5%) patients showed good outcome and functional independence at 1 month. Occipital condyle fractures are rare injuries with a wide range of morphology, stability and clinical significance. Thorough radiological evaluation of all components of the occipito-atlanto-axial joint complex must be performed in order to determine the full extent of injury. In this series, most unilateral OCFs were managed by non-operative immobilisation, whereas bilateral occipito-atlanto-axial

  11. The analysis of imageology for screw tunnel of atlas-axis components of artificial atlanto-odontoid joint%人工寰齿关节寰枢椎部件固定钉道的影像学分析

    Institute of Scientific and Technical Information of China (English)

    胡勇; 袁振山; 赵红勇; 顾勇杰; 夏华杰; 华群

    2012-01-01

    目的 探讨自行设计的人工寰齿关节( AAOJ)在寰枢关节骨性标本上置换后寰枢椎部件固定螺钉通道的安全性和可行性.方法 在32具正常成年人尸体寰枢关节湿性标本上行人工寰齿关节置换术后,行寰枢椎薄层CT扫描及三维重建,测量与AAOJ内固定的相关指标,并观察寰枢椎部件固定螺钉通道与横突孔、椎动脉沟、椎管等重要解剖结构安全空间.结果 寰椎部件固定螺钉的长度(L)为(21.5±3.7) mm,寰椎部件固定螺钉外倾角(d)为(12.9±4.8)°,寰椎部件固定螺钉下倾角(δ)为(3.0±1.2)°.枢椎部件固定螺钉的长度(S)是(28.6±3.7) mm,枢椎部件固定螺钉的外倾角度(β)是(22.6±4.3)°,枢椎部件固定螺钉的下倾角度(θ)是(15.8±2.6)°.结论 固定人工寰齿关节寰枢椎部件的螺钉通道与横突孔、椎动脉沟、椎管等重受解剖结构之间有安全空间范围.%Objective To investigate feasibility and safety for screw tunnel of atlas-axis components of artificial atlanto-odontoid joint (AAOJ) arthroplasty in bony specimens of atlanto-axial joint.Methods The thin-slice CT scannning and the three-dimension reconstruction were performed through 32 sets of artificial atlanto-odontoid joint arthroplasty in adults' bony specimens.The indicators related to AAOJ internal fixation were measured and applied to observe the safe space among screw tunnel of atlas-axis components and important anatomy structures such as transverse foramen,groove for vertebral artery,vertebral canal,etc.Results The length of screw tunnel of atlas components (L) was (21.5 ±3.7) mm,the extraversion angle of screw tunnel of atlas components (α) was ( 12.9 ± 4.8) °,the length of screw tunnel of axis components (S) was (28.6± 3.7) mm,the extraversion angle of screw tunnel of axis components (β) was (22.6 ±4.3)°,and the downslope angle of screw tunnel of axis components (θ) was ( 15.8 ±2.6) °.Conclusion There is a comparatively large safe

  12. 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...

  13. Joint ventures

    NARCIS (Netherlands)

    M.N. Hoogendoorn (Martin)

    2009-01-01

    textabstractEen veel voorkomende wijze van samenwerking tussen ondernemingen is het uitvoeren van activiteiten in de vorm van een joint venture. Een joint venture is bijna altijd een afzonderlijke juridische entiteit. De partners in de joint venture voeren gezamenlijk de zeggenschap uit. In internat

  14. 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

  15. 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 ...

  16. 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...

  17. 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.)

  18. 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 the test is partly to obtain empirical data for the ultimate load-carrying capacity of tubular T-joints and partly to obtain some experience in performing tests with tubular joints. It is well known that tubular joints are usually designed in offshore engineering on the basis of empirical formulas obtained...

  19. 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.

  20. 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...... over their joint company....

  1. 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 ...

  2. 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 ...

  3. 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 ...

  4. Jointly Poisson processes

    CERN Document Server

    Johnson, D H

    2009-01-01

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

  5. Mechanics of Sheeting Joints

    Science.gov (United States)

    Martel, S. J.

    2015-12-01

    Physical breakdown of rock across a broad scale spectrum involves fracturing. In many areas large fractures develop near the topographic surface, with sheeting joints being among the most impressive. Sheeting joints share many geometric, textural, and kinematic features with other joints (opening-mode fractures) but differ in that they are (a) discernibly curved, (b) open near the topographic surface, and (c) form subparallel to the topographic surface. Where sheeting joints are geologically young, the surface-parallel compressive stresses are typically several MPa or greater. Sheeting joints are best developed beneath domes, ridges, and saddles; they also are reported, albeit rarely, beneath valleys or bowls. A mechanism that accounts for all these associations has been sought for more than a century: neither erosion of overburden nor high lateral compressive stresses alone suffices. Sheeting joints are not accounted for by Mohr-Coulomb shear failure criteria. Principles of linear elastic fracture mechanics, together with the mechanical effect of a curved topographic surface, do provide a basis for understanding sheeting joint growth and the pattern sheeting joints form. Compressive stresses parallel to a singly or doubly convex topographic surface induce a tensile stress perpendicular to the surface at shallow depths; in some cases this alone could overcome the weight of overburden to open sheeting joints. If regional horizontal compressive stresses, augmented by thermal stresses, are an order of magnitude or so greater than a characteristic vertical stress that scales with topographic amplitude, then topographic stress perturbations can cause sheeting joints to open near the top of a ridge. This topographic effect can be augmented by pressure within sheeting joints arising from water, ice, or salt. Water pressure could be particularly important in helping drive sheeting joints downslope beneath valleys. Once sheeting joints have formed, the rock sheets between

  6. Managing Joint Production Motivation

    DEFF Research Database (Denmark)

    Lindenberg, Siegwart; Foss, Nicolai Juul

    2011-01-01

    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....

  7. 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.)

  8. Creep of timber joints

    NARCIS (Netherlands)

    Van de Kuilen, J.W.G.

    2008-01-01

    A creep analysis has been performed on nailed, toothed-plates and split-ring joints in a varying uncontrolled climate. The load levels varied between 30% and 50% of the average ultimate short term strength of these joints, tested in accordance with ISO 6891. The climate in which the tests were perfo

  9. Strategies for joint appointments.

    Science.gov (United States)

    Royle, J; Crooks, D L

    1985-01-01

    The structure and policies governing joint appointments discussed above, are developed primarily through cooperation and collaboration between nursing service and education institutions. The joint appointee participates in the process of negotiation of salary, benefits and role responsibilities and exploration of the implications of the appointment for personal career development. Implementation and maintenance of the appointment requires the collaborative efforts of the joint appointee with both contracting agencies. Factors influencing the functioning of joint appointees have been identified and strategies to facilitate functioning presented. The joint appointee must be independent in thought and action yet adaptable to work within the boundaries of two social systems with differing values and expectations. Nursing management, peers and students can provide the support needed to overcome the frustrations and to achieve the rewards inherent in successful implementation of an exciting and innovative role. PMID:3852805

  10. 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.

  11. 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, ...

  12. 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 ...

  13. 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 ...

  14. 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 ...

  15. 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 ...

  16. 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...

  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. 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...

  19. High pressure ceramic joint

    Science.gov (United States)

    Ward, Michael E.; Harkins, Bruce D.

    1993-01-01

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

  20. [Biomechanics of the ankle joint].

    Science.gov (United States)

    Zwipp, H

    1989-03-01

    According to Fick, the tree-dimensional patterns of foot motion are best characterized as jawlike movement. Anatomically and biomechanically, this process represents conjoined, synchronous motion within the three mobile segments of the hindfoot: the ankle joint, the posterior subtalar joint, and the anterior subtalar joint. Foot kinematics can be described more completely if the anterior subtalar joint is defined not only as the talocalcaneal navicular joint, but as including the calcaneocuboid joint, thus representing the transverse joint of the tarsus, i.e., the Chopart joint. The axes of these three joints can be defined precisely. In some parts they represent a screwlike motion, clockwise or counter-clockwise, around the central ligamentous structures (fibulotibial ligament, talocalcaneal interosseous ligament, bifurcate ligament). The individual anatomy and structure of these ligaments provide variations in the degree and direction of foot motion. A precise knowledge of foot kinematics is important in surgical ligament and joint reconstruction and in selective foot arthrodeses.

  1. Joint ventures in medical services.

    Science.gov (United States)

    Rublee, D A

    1987-01-01

    This paper is an overview of joint-venture activity in healthcare, describing trends in joint ventures and raising issues for physicians. The purposes are to discuss the major current facets of joint-venture alliances in healthcare and to identify policy issues that arise from the trend to use joint ventures as an organizational tool. Speculation is made about the future role of joint ventures in the organization of healthcare.

  2. 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

  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. Dissimilar metals joint evaluation

    Science.gov (United States)

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

    1974-01-01

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

  5. 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.

  6. Temporomandibular joint examination reviewed

    Directory of Open Access Journals (Sweden)

    L. Guarda Nardini

    2011-09-01

    Full Text Available The temporo-mandibular joint (TMJ it’s a joint closely related to the skull base, the spine, and the jaws; all these anatomical structures must be taken in consideration when evaluating pain involving the tmj. In order to detect patients affected by pathology or dysfunctions of the tmj, physical examination is of great value in orienting the diagnosis. Inspection must consider the symmetry of the body, the dental status and the type of occlusion. Palpation is a way to assess contractiont involving the muscles of the masticatory system and of the neck. Auscultation, based on articular noise provides means to determine whether we are dealing with degeneration of the joint or a dislocation of the intrarticular disc. In order to confirm the diagnosis obtained with the clinical evaluation, it’s useful to perform imaging techniques as opt, tomography and TC of the tmj and electromyokineosiography – index of the mandibular functionality and of the muscles status. MRI and dynamic MRI are among the non invasive exams which give the greatest amount of information, regarding the disc position and the joint degeneration. Arthroscopy is an invasive technique that allows early diagnosis of degeneration and is helpful to reveal early inflammatory processes of the joint.

  7. 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

  8. 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

  9. Studies of welded joints

    Directory of Open Access Journals (Sweden)

    J. M. Krupa

    2010-07-01

    Full Text Available Studies of a welded joint were described. The joint was made as a result of the reconstruction of a truss and one of the possible means to make a repair. The studies were of a simulation character and were targeted at the detection of welding defects and imperfections thatshould be eliminated in a real structure. A model was designed and on this model the tests and examinations were carried out. The modelwas made under the same conditions as the conditions adopted for repair. It corresponded to the real object in shape and dimensions, and in the proposed technique of welding and welding parameters. The model was composed of five plates joined together with twelve beads.The destructive and non-destructive tests were carried out; the whole structure and the respective welds were also examined visually. Thedefects and imperfections in welds were detected by surface methods of inspection, penetration tests and magnetic particle flaw detection.The model of the welded joint was prepared by destructive methods, a technique that would never be permitted in the case of a realstructure. For the investigations it was necessary to cut out the specimens from the welded joint in direction transverse to the weld run. The specimens were subjected to metallographic examinations and hardness measurements. Additionally, the joint cross-section was examined by destructive testing methods to enable precise determination of the internal defects and imperfections. The surface methods were applied again, this time to determine the severity of welding defects. The analysis has proved that, fabricated under proper conditions and with parameters of the welding process duly observed, the welded joint has good properties and repairs of this type are possible in practice.

  10. 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....

  11. Atlantoaxial dislocation

    Directory of Open Access Journals (Sweden)

    Vijendra K Jain

    2012-01-01

    Full Text Available Atlanto-axial dislocations (AADs may be classified into four varieties depending upon the direction and plane of the dislocation i.e. anteroposterior, rotatory, central, and mixed dislocations. However, from the surgical point of view these are divided into two categories i.e. reducible (RAADs and irreducible (IAADs. Posterior fusion is the treatment of choice for RAAD. Transarticular screw fixation with sub-laminar wiring is the most stable& method of posterior fusion. Often, IAAD is due to inadequate extension in dynamic X-ray study which may also be due to spasm of muscles. If the anatomy at the occipito-atlanto-axial region {O-C1-C2; O: occiput, C1: atlas, C2: axis} is normal on X-ray, the dislocation should be reducible. In case congenital anomalies at O-C1-C2 and IAAD are seen on flexion/extension studies of the cervical spine, the C1-C2 joints should be seen in computerized tomography scan (CT. If the C1-C2 joint facet surfaces are normal, the AAD should be reducible by cervical traction or during surgery by mobilizing the joints. The entity termed "dolichoodontoid" does not exist. It is invariably C2-C3 (C3- third cervical vertebra fusion which gives an appearance of dolichoodontoid on plain X-ray or on mid-saggital section of magnetic resonance imaging (MRI or CT scan. The central dislocation and axial invagination should not be confused with basilar invagination. Transoral odontoidectomy alone is never sufficient in cases of congenital IAAD, adequate generous three-dimensional decompression while protecting the underlying neural structures should be achieved. Chronic post-traumatic IAAD are usually Type II odontoid fractures which get malunited or nonunited with pseudoarthrosis in dislocated position. All these dislocations can be reduced by transoral removal of the offending bone, callous and fibrous tissue.

  12. A symptomatic coracoclavicular joint

    NARCIS (Netherlands)

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

    2006-01-01

    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

  13. Joint Custody and Coparenting.

    Science.gov (United States)

    Sell, Kenneth D.

    Results are presented of an intensive search of U.S. newspapers and periodicals on the joint custody of children after divorce, where both parents have continued responsibility for parenting and where the children spend part of each week, month, or year with both of the parents. Areas of concern addressed by these materials include the following:…

  14. 后路钉棒系统在经寰枢椎椎弓根治疗可复性寰枢椎不稳定中的应用%Using of axial screw-rod system via vertebrae pedicle screw of the atlas and axis for treatment of reducible atlanto-axial instability

    Institute of Scientific and Technical Information of China (English)

    胡巍; 陈水连; 柯宝毅; 秦壁松

    2014-01-01

    目的 评价颈椎后路钉棒系统治疗可复性寰枢关节不稳的临床疗效.方法 2006年1月-2010年1月共收治32例寰枢关节失稳患者,男,19例,女,13例,平均年龄42.2岁.术前行床边颅骨牵引2周,并床边照片,见寰枢关节可经牵引复位,再行后路寰枢椎椎弓根螺钉钉棒系统内固定术.根据SYMON-LAVENDER临床标准、JOA脊髓功能评定标准和影像学颈髓延髓角的改善情况进行疗效评定.结果 32例寰枢关节均获良好复位.平均随访24个月,所有植骨均获得骨性融合.术后按SYMON-LAVENDER标准,总体有效率为87.5%.JOA评分由术前(8.6±2.1)分,改善为术后(14.8±3.1)分,改善率为74.0%.平均颈髓延髓角由110.5°,改善为148°.结论 后路寰椎椎弓根螺钉内固定术具有直视,短节段固定,融合率高等优点,是治疗可复性寰枢关节失稳的安全有效方法.

  15. Shoulder Joint For Protective Suit

    Science.gov (United States)

    Kosmo, Joseph J.; Smallcombe, Richard D.

    1994-01-01

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

  16. 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 ...

  17. 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...

  18. Achieving joint benefits from joint implementation

    Energy Technology Data Exchange (ETDEWEB)

    Moomaw, W.R. [Tufts Univ., Medford, MA (United States)

    1995-11-01

    Joint Implementation (JI) appears to have been born with Applied Energy Services Guatemala project in 1988. That project, to plant 52 million trees, protect existing forests from cutting and fire, and enhance rural development, is being implemented by CARE Guatemala to offset 120 per cent of the emissions of a small coal burning power plant that has been built in Connecticut. Since that time, several utilities and governments have initiated additional projects. Not all of these necessarily consist of tree planting in other countries, but may consist of energy efficiency or energy conservation programs designed to reduce carbon emissions by at least as much as the additional releases from a new facility. All JI projects share the characteristic of linking the release of greenhouse gases in an industrial country with an offset that reduces or absorbs a comparable amount in another country. The emitter in the industrial country is willing to pay for the reduction elsewhere because costs are less than they would be at home.

  19. JOINT VENTURES AMONG EXPORTING FIRMS

    OpenAIRE

    CHAUDHURI, Prabal Ray

    2000-01-01

    In this paper we examine the incentive for joint venture formation among exporting firms. We show that an increase in domestic demand increases the incentive for joint venture formation. An increase in world price, however, can either increase or decrease the incentive for joint venture formation.

  20. 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

  1. 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.)

  2. Laundry joint venture.

    Science.gov (United States)

    Giancola, D; Voyvodich, M

    1984-12-01

    Many hospitals are concerned about the loss of control which is associated with contracting for linen service. On the the hand, many laundries do not have the resources or experience to serve hospitals in a comprehensive and trouble-free manner. In many communities a joint venture, such as the one described here, can successfully combine the interests of the hospital and laundry communities without causing the hospitals to lose control of the service and without requiring the laundry operator to have detailed knowledge of hospital operations. As more hospitals opt for contract service, and if this service is to be provided at the lowest total cost, the hospitals and the laundries must come to grips with the problems surrounding the laundry-hospital interface. A joint venture, such as that described here, is one way to accomplish this.

  3. 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...

  4. 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,...

  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. 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.)

  7. 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

  8. 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

  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. 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

  13. 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

  14. 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.

  15. 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

  16. JOINT ADVISORY APPEALS BOARD

    CERN Multimedia

    Personnel Division

    1999-01-01

    The Joint Advisory Appeals Board was convened to examine the appeal lodged by Mr Joào Bento with regard to residential category. As the appellant has not objected, the recommendations of the Board and the final decision of the Director-General are brought to the notice of the personnel in accordance with Article RÊVIÊ1.20 of the Staff Regulations.The relevant documents will therefore be posted on the notice boards of the Administration Building (N¡ 60) from 29 October to 12 November 1999.Personnel DivisionTel. 74128

  17. Surgery center joint ventures.

    Science.gov (United States)

    Zasa, R J

    1999-01-01

    Surgery centers have been accepted as a cost effective, patient friendly vehicle for delivery of quality ambulatory care. Hospitals and physician groups also have made them the vehicles for coming together. Surgery centers allow hospitals and physicians to align incentives and share benefits. It is one of the few types of health care businesses physicians can own without anti-fraud and abuse violation. As a result, many surgery center ventures are now jointly owned by hospitals and physician groups. This article outlines common structures that have been used successfully to allow both to own and govern surgery centers.

  18. Acromioclavicular Joint Reconstruction.

    Science.gov (United States)

    Scillia, Anthony J; Cain, E Lyle

    2015-12-01

    Our technique for acromioclavicular joint reconstruction provides a variation on coracoclavicular ligament reconstruction to also include acromioclavicular ligament reconstruction. An oblique acromial tunnel is drilled, and the medial limb of the gracilis graft, after being crossed and passed beneath the coracoid and through the clavicle, is passed through this acromial tunnel and sutured to the trapezoid graft limb after appropriate tensioning. Tenodesis screws are not placed in the bone tunnels to avoid graft fraying, and initial forces on the graft are offloaded with braided absorbable sutures passed around the clavicle. PMID:27284528

  19. 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.

  20. 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)

  1. 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)

  2. 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

  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 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)

  4. 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)

  5. Joint Advisory Appeals Board

    CERN Multimedia

    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

  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 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

  7. Joint Advisory Appeals Board

    CERN Multimedia

    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

  8. 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

  9. 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.

  10. Joint collaborative technology experiment

    Science.gov (United States)

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

    2009-05-01

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

  11. OIG targets contractual joint ventures.

    Science.gov (United States)

    O'Hare, Patrick K

    2003-09-01

    A recent OIG Special Advisory Bulletin raises questions for providers involved in joint ventures. The Bulletin describes several characteristics that the OIG views as potentially suspect, including a referral stream controlled by the provider initiating the joint venture and the use of a wholly owned subsidiary of the provider to bill and collect for services. According to the OIG, profits paid by the subsidiary to the provider owner in such "suspect contractual joint ventures" could constitute illegal remuneration for referrals.

  12. Arthrography of the knee joint

    Energy Technology Data Exchange (ETDEWEB)

    Keyl, W.; Jaeger, M.

    1981-10-01

    The standardized examination technique and the clinical problems of the arthrographic mehtod applied on the knee joint is explained by the results obtained in 3000 examinations. Whereas the accuracy of the knee-joint arthrography provides a high degree in cases of meniscus lesions, computer tomography presents in chondral and capsular ligament lesions, and sonography in popliteal cysts better diagnostic information; but in any case arthroscopy gains more and more importance in knee-joint diagnostics.

  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. Variable Joint Elasticities in Running

    Science.gov (United States)

    Peter, Stephan; Grimmer, Sten; Lipfert, Susanne W.; Seyfarth, Andre

    In this paper we investigate how spring-like leg behavior in human running is represented at joint level. We assume linear torsion springs in the joints and between the knee and the ankle joint. Using experimental data of the leg dynamics we compute how the spring parameters (stiffness and rest angles) change during gait cycle. We found that during contact the joints reveal elasticity with strongly changing parameters and compare the changes of different parameters for different spring arrangements. The results may help to design and improve biologically inspired spring mechanisms with adjustable parameters.

  15. 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

  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 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.

  18. 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)

  19. Structuring managed care joint ventures.

    Science.gov (United States)

    Williams, L

    1995-08-01

    Providers that undertake joint ventures to secure managed care contracts must understand the important governance, operational, legal, and political issues involved. Careful planning in all these areas can help ensure that the joint venture will meet its goals and avoid problems such as inappropriately negotiated contracts and legal violations.

  20. 37 CFR 1.45 - Joint inventors.

    Science.gov (United States)

    2010-07-01

    ... 37 Patents, Trademarks, and Copyrights 1 2010-07-01 2010-07-01 false Joint inventors. 1.45 Section... Patent § 1.45 Joint inventors. (a) Joint inventors must apply for a patent jointly and each must make the... patent for an invention invented by them jointly, except as provided in § 1.47. (b) Inventors may...

  1. 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...

  2. 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,

  3. Joint ventures in health care.

    Science.gov (United States)

    Pelfrey, S; Theisen, B A

    1989-04-01

    To remain competitive, many not-for-profit hospitals have turned to joint ventures with for-profit and other not-for-profit entities. The authors examine the organizational structures that are used most often to form joint ventures (contractual agreements, subsidiary corporations, partnerships, and not-for-profit title-holding corporations), as well as the advantages and disadvantages associated with each form. Nurse executives must be aware of the opportunities that joint ventures provide their institutions. These arrangements can help improve and expand services and profitability.

  4. 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...

  5. 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...

  6. Campus/Industry Joint Ventures.

    Science.gov (United States)

    McDonald, Eugene J.

    1985-01-01

    Opportunities for joint economic ventures of colleges and industry are discussed, and a variety of ventures undertaken by Duke University are outlined, including a health club, hotel, and office building. Tax and financing considerations are noted. (MSE)

  7. Joint audits - benefit or burden?

    DEFF Research Database (Denmark)

    Holm, Claus; Thinggaard, Frank

    In this paper we examine whether there are perceived and observed benefits or burdens from using two audit firms instead of one. In 2005 the mandatory joint audit requirement was abolished in Denmark. This provides a unique setting for studying the consequences and implications of going from...... a 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...... driving-force behind this seems to be initial price cuts due to competition. However, the results indicate that efficiency gains may also be part of the explanation. We do not find either a general or marginal Big Four effect in the Danish audit market....

  8. 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 joints....

  9. 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).

  10. IRS memorandum limits joint ventures.

    Science.gov (United States)

    Herman, A W

    1992-08-01

    Based on a new memorandum, the Internal Revenue Service (IRS) will be looking at joint hospital/physician activities with greater attention to the nuances of public versus private benefit. As a result, hospitals face greater risk of losing their tax-exempt status in the maze of joint ventures, physician recruitment, and practice acquisition. To be successful, ventures will have to be backed by sound reasoning and thorough documentation.

  11. "Fraud alert": joint venture arrangements.

    Science.gov (United States)

    Vipperman, R M

    1989-01-01

    The Office of Inspector General of the Department of Health and Human Services recently issued a special "Fraud Alert" identifying those characteristics of joint venture arrangements that it views as indicators of potentially unlawful activity. As discussed in this article, participants in joint ventures should examine their arrangements to see if one or more of the questionable features are present, and, if so, should take steps to eliminate them, to the extent possible.

  12. Joint probabilities and quantum cognition

    CERN Document Server

    de Barros, J Acacio

    2012-01-01

    In this paper we discuss the existence of joint probability distributions for quantum-like response computations in the brain. We do so by focusing on a contextual neural-oscillator model shown to reproduce the main features of behavioral stimulus-response theory. We then exhibit a simple example of contextual random variables not having a joint probability distribution, and describe how such variables can be obtained from neural oscillators, but not from a quantum observable algebra.

  13. 12 CFR 347.107 - Joint ventures.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 4 2010-01-01 2010-01-01 false Joint ventures. 347.107 Section 347.107 Banks... INTERNATIONAL BANKING § 347.107 Joint ventures. (a) Joint ventures. If a bank, directly or indirectly, acquires or holds an equity interest in a foreign organization that is a joint venture, and the bank or...

  14. Condylar hyperplasia following unilateral temporomandibular joint replacement.

    Science.gov (United States)

    Machon, V; Levorova, J; Hirjak, D; Foltan, R

    2015-06-01

    Total joint replacement of the temporomandibular joint (TJR) can be associated with intraoperative and postoperative complications. We report herein the occurrence of a postoperative open bite malocclusion, the result of condylar hyperplasia affecting the non-operated joint at 1 year after unilateral total joint replacement. PMID:25662429

  15. 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

  16. 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

  17. 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.

  18. 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...... 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 present paper...... presents a combined numerical and experimental method for fast determination of appropriate coil geometry and position in induction brazing tube-to-plate joints of different ratios between tube and plate thickness and different combinations of the materials stainless steel, brass and copper. The method has...

  19. 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.

  20. 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 ...

  1. 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

  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 approach...

  3. Uncertainty of knee joint muscle activity during knee joint torque exertion: the significance of controlling adjacent joint torque.

    Science.gov (United States)

    Nozaki, Daichi; Nakazawa, Kimitaka; Akai, Masami

    2005-09-01

    In the single-joint torque exertion task, which has been widely used to control muscle activity, only the relevant joint torque is specified. However, the neglect of the neighboring joint could make the procedure unreliable, considering our previous result that even monoarticular muscle activity level is indefinite without specifying the adjacent joint torque. Here we examined the amount of hip joint torque generated with knee joint torque and its influence on the activity of the knee joint muscles. Twelve healthy subjects were requested to exert various levels of isometric knee joint torque. The knee and hip joint torques were obtained by using a custom-made device. Because no information about hip joint torque was provided to the subjects, the hip joint torque measured here was a secondary one associated with the task. The amount of hip joint torque varied among subjects, indicating that they adopted various strategies to achieve the task. In some subjects, there was a considerable internal variability in the hip joint torque. Such variability was not negligible, because the knee joint muscle activity level with respect to the knee joint torque, as quantified by surface electromyography (EMG), changed significantly when the subjects were requested to change the strategy. This change occurred in a very systematic manner: in the case of the knee extension, as the hip flexion torque was larger, the activity of mono- and biarticular knee extensors decreased and increased, respectively. These results indicate that the conventional single knee joint torque exertion has the drawback that the intersubject and/or intertrial variability is inevitable in the relative contribution among mono- and biarticular muscles because of the uncertainty of the hip joint torque. We discuss that the viewpoint that both joint torques need to be considered will bring insights into various controversial problems such as the shape of the EMG-force relationship, neural factors that help

  4. Solder Joint Health Monitoring Testbed

    Science.gov (United States)

    Delaney, Michael M.; Flynn, James G.; Browder, Mark E.

    2009-01-01

    A method of monitoring the health of selected solder joints, called SJ-BIST, has been developed by Ridgetop Group Inc. under a Small Business Innovative Research (SBIR) contract. The primary goal of this research program is to test and validate this method in a flight environment using realistically seeded faults in selected solder joints. An additional objective is to gather environmental data for future development of physics-based and data-driven prognostics algorithms. A test board is being designed using a Xilinx FPGA. These boards will be tested both in flight and on the ground using a shaker table and an altitude chamber.

  5. [Divorce and joint physical custody].

    Science.gov (United States)

    Golse, B

    2014-04-01

    This work first recalls the definition of joint physical custody, as well as the current legal procedure for obtaining it, its practical implementation, the financial implications for parents, and finally some statistics. Some psychological and psychopathological reflections on the impact of divorce on children are then presented before considering the question of joint physically custody with regard to attachment theory and depending on the age of the child (a great caution seems to be required before three years). The article concludes with a brief discussion of parental alienation syndrome.

  6. 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...

  7. 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.

  8. Joint IGCP 499/SDS Meeting

    Institute of Scientific and Technical Information of China (English)

    Peter K(o)nigshof; Eberhard Schindler; Volker Wildez; Jurga Lazauskiene; M. Namik Yal(c)in

    2006-01-01

    @@ A major event of IGCP 499 in 2005 took place in Southern Siberia. In the tradition of successful joint meetings and field trips of Devonian IGCP projects and the international Subcommission on Devonian Stratigraphy (SDS), a very successful meeting was held at the Institute of Petroleum Geology,United Institute of Geology and Mineralogy of the Russian Academy of Sciences, Siberian Branch in Novosibirsk.

  9. The Rationale for Joint Mobilization.

    Science.gov (United States)

    Burkhardt, Sandy

    This paper presents an overview of the functions of connective tissue and the mechanisms of joint injury and contracture formation in relation to therapeutic exercise. The components of connective tissue operation are explained, including fibroblasts, macrophages, plasma cells, and collagen. An examination of the histology of connective tissue as…

  10. Arthrography of the ankle joint

    Energy Technology Data Exchange (ETDEWEB)

    Crespi Porro, R.; Zellner, A.; Puricelli, G.; Quaglia, R.; Chelazzi, G.

    1984-02-01

    Arthrography of the ankle joint was first carried out by Johnson and Palmer at the Military Hospital in Stockholm in 1940. Arthrography can be used for judging the integrity of the articular cartilage, of osteochondritis dissecans, arthritis or adhesive capsulitis. The literature shows, however, that more than 95% of the patients on whom this examination has been performed has suffered from acute trauma.

  11. Organizational aspects of physician joint ventures.

    Science.gov (United States)

    Rublee, D A; Rosenfield, R H

    1987-03-01

    This article describes organizational forms of physician joint ventures. Four models are described that typify physician involvement in health care joint ventures: limited partnership syndication, venture capital company, provider network, and alternative delivery system. Important practical issues are discussed.

  12. 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 ...

  13. 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

  14. 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.

  15. 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...

  16. 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.

  17. 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...

  18. 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...

  19. Joint laxity in the performing arts.

    Science.gov (United States)

    Bird, H

    2016-05-25

    Traditional scoring systems for the assessment of joint flexibility are reviewed and reasons for variation in joint laxity are defined. The value of controlled joint laxity in the hands and arms of musicians is then discussed as well as the desirability of adjusting laxity at the various joints used in the different styles of dance, some of them ethnic, that depend on the specific articular characteristics of each different dancer.

  20. 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...

  1. 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...

  2. 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...

  3. 46 CFR 385.38 - Joint funding.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 8 2010-10-01 2010-10-01 false Joint funding. 385.38 Section 385.38 Shipping MARITIME... AGREEMENTS REGULATIONS General Policies § 385.38 Joint funding. (a) Pursuant to section 10(c) of the Act, MarAd is authorized to participate in joint funded projects with other Federal agencies in any...

  4. 22 CFR 228.34 - Joint ventures.

    Science.gov (United States)

    2010-04-01

    ... 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 AND... Financing § 228.34 Joint ventures. A joint venture or unincorporated association is eligible only if each...

  5. 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.

  6. 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

  7. 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.

  8. 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)

  9. 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...

  10. 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...

  11. 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...

  12. 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.

  13. Symptomatic carpal coalition: scaphotrapezial joint.

    Science.gov (United States)

    Campaigniac, Erin; Eskander, Mark; Jones, Marci

    2013-12-01

    Carpal coalition is an uncommon congenital abnormality that arises from incomplete cavitation of the common cartilaginous precursor that forms the carpal bones. When carpal coalition is discovered, it is typically an asymptomatic incidental radiographic finding, and is often bilateral. We present a case of symptomatic unilateral carpal coalition of the scaphotrapezial joint, which was treated by excising the fibrous coalition and placing an interposition fat graft. This treatment was effective in alleviating the patient's symptoms.

  14. 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.

  15. 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.

  16. Joint Acoustic and Modulation Frequency

    Directory of Open Access Journals (Sweden)

    Les Atlas

    2003-06-01

    Full Text Available There is a considerable evidence that our perception of sound uses important features which is related to underlying signal modulations. This topic has been studied extensively via perceptual experiments, yet there are few, if any, well-developed signal processing methods which capitalize on or model these effects. We begin by summarizing evidence of the importance of modulation representations from psychophysical, physiological, and other sources. The concept of a two-dimensional joint acoustic and modulation frequency representation is proposed. A simple single sinusoidal amplitude modulator of a sinusoidal carrier is then used to illustrate properties of an unconstrained and ideal joint representation. Added constraints are required to remove or reduce undesired interference terms and to provide invertibility. It is then noted that the constraints would also apply to more general and complex cases of broader modulation and carriers. Applications in single-channel speaker separation and in audio coding are used to illustrate the applicability of this joint representation. Other applications in signal analysis and filtering are suggested.

  17. 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

  18. 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.

  19. 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

  20. 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

  1. Joint venture on degree course.

    Science.gov (United States)

    1987-12-19

    A ground breaking joint venture between South Glamorgan's Health Authority and Institute of Higher Education will bear fruit next year when the first students enrol for a new part time post registration degree course in nursing studies. The four-year course will be split into two equal sections, diploma and degree, and will be open to any first level registered nurse. Nurses who have already obtained their diploma will be able to opt in for the degree course only and there are plans to introduce access courses for applicants with the old London University Diploma so they too can qualify.

  2. 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.)

  3. The Planar Shape of Rock Joints

    Science.gov (United States)

    Zhang, Lianyang; Einstein, Herbert H.

    2010-02-01

    Knowing the planar shape of discontinuities is important when characterizing discontinuities in a rock mass. However, the real discontinuity shape is rarely known, since the rock mass is usually inaccessible in three dimensions. Information on discontinuity shape is limited and often open to more than one interpretation. This paper discusses the planar shape of rock joints, the most common discontinuities in rock. First, a brief literature review about the shape of joints is presented, including some information on joint-surface morphology, inferences from observed trace lengths on different sampling planes, information based on experimental studies, and joint shapes assumed by different researchers. This review shows that joints not affected by adjacent geological structures such as bedding boundaries or pre-existing fractures tend to be elliptical (or approximately circular but rarely). Joints affected by or intersecting such geological structures tend to be rectangular. Then, using the general stereological relationship between trace length distributions and joint size distributions developed by Zhang et al. (Geotechnique 52(6):419-433, 2002) for elliptical joints, the effect of sampling plane orientation on trace lengths is investigated. This study explains why the average trace lengths of non-equidimensional (elliptical or similar polygonal) joints on two sampling planes can be about equal and thus the conclusion that rock joints are equidimensional (circular) drawn from the fact that the average trace lengths on two sampling planes are approximately equal can be wrong. Finally, methods for characterizing the shape and size of joints (elliptical or rectangular) from trace length data are recommended, and the appropriateness of using elliptical joint shapes to represent polygonal, especially rectangular, joints is discussed.

  4. 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.

  5. 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

  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. 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.

  8. 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

  9. Internationale joint ventures - udvalgte selskabsretlige problemstillinger

    DEFF Research Database (Denmark)

    Sørensen, Karsten Engsig

    2001-01-01

    Artiklen behandler en række problemstillinger som er særlige for joint ventures stiftet i selskaber af aktie-, anpartsselskabstypen. Bl.a. behandles en række problemer omkring joint venture aftalens forhold til selskabets vedtægter samt en række problemstillinger knyttet til det forhold at der er...... etableret fælles kontrol over joint venture selskabet....

  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. 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...

  12. Innovative Design Concepts for Insulated Joints

    OpenAIRE

    Charlton, Zachary

    2007-01-01

    The main goal of this research is to develop new and innovative designs for insulated rail joints for improved life cycle and higher cost effectiveness. The research focuses on using electrically insulating materials that replace the epoxy used in current bonded insulated joints. Insulated joints (commonly known as â IJsâ ) are widely used on railways to electrically insulate rail segments from each other, while mechanically connecting them together. The electrical insulation is necessar...

  13. 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...

  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 of thoracic facet joint].

    Science.gov (United States)

    Ben Abdelghani, K; Gérard-Dran, D; Combe, B

    2009-08-01

    Septic arthritis of the facet joint is a rare condition. We report a case of septic arthritis of both a thoracic facet joint and a wrist. Clinical manifestations were consistent with a spondylodiscitis. Magnetic resonance imaging of the spine demonstrated infection of facet joints of T1 and T2. A surgical biopsy of the wrist isolated a type B streptococcus. The same organism was found in urine culture. The patient had an uneventful recovery on antibiotics.

  16. 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.

  17. 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.

  18. First Metatarsophalangeal Joint Arthroscopy for Osteochondral Lesions.

    Science.gov (United States)

    Sherman, Thomas I; Kern, Michael; Marcel, John; Butler, Alexander; McGuigan, Francis X

    2016-06-01

    Small-joint arthroscopy has supplanted open procedures because it offers the potential for improvement in joint visualization, reduced scarring, and accelerated recovery. Despite these advantages, arthroscopy of the first metatarsophalangeal joint is not commonly performed and reports of its use are lacking. The reason for this is not clear but may be because of perceived technical complexity and poorly defined indications. In our experience, however, arthroscopy of the first metatarsophalangeal joint is a versatile procedure that facilitates treatment of many different pathologic processes through a minimally invasive approach with few complications. We present our technique for arthroscopic management of osteochondral lesions of the hallux. PMID:27656371

  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. Computed tomography of the elbow joint

    Energy Technology Data Exchange (ETDEWEB)

    Burmester, E.; Gmelin, E.; Mendoza, A.S.

    1985-12-01

    An essential pre-condition for the interpretation of computer tomographs of the elbow joint is a knowledge of the normal anatomy. The complexity of the joint requires a definite protocol for the examination, since only in this way it is possible to distinguish all anatomical structures and pathological processes. A clinical example is used to show that CT of the elbow joint is superior to all other radiographic methods for demonstrating osteochondritis dissecans. It is therefore an important additional method for demonstrating the elbow joint.

  3. 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 ...

  4. 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...

  5. From Disunited to Joint Action

    Directory of Open Access Journals (Sweden)

    Kaarina Mönkkönen

    2015-08-01

    Full Text Available Inter-organizational collaboration can be understood as a product of sets of conversations that draw on existing discourses. This article examines one public organization going through a fundamental organizational change. We describe the process of construction of organizational identity after a merger by using a model describing identified forms of interaction: (a formally together, (b unidirectional interaction, (c juxtapositions, (d construction of commonality, and (e the state of joint action. There is a link between the construction of a more collectively interpreted identity and the way in which people communicate, create relationships, and network. This article highlights the relevance and meaning of conscious identity work in the process: The management’s ability and willingness to create forums for dialogue and social interaction creates potential for construction of a collectively interpreted organizational identity and promotes cooperation and collaboration.

  6. 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.

  7. 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.

  8. 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…

  9. Experimental Investigation of Composite Pressure Vessel Performance and Joint Stiffness for Pyramid and Inverted Pyramid Joints

    Science.gov (United States)

    Verhage, Joseph M.; Bower, Mark V.; Gilbert, Paul A. (Technical Monitor)

    2001-01-01

    The focus of this study is on the suitability in the application of classical laminate theory analysis tools for filament wound pressure vessels with adhesive laminated joints in particular: pressure vessel wall performance, joint stiffness and failure prediction. Two 18-inch diameter 12-ply filament wound pressure vessels were fabricated. One vessel was fabricated with a 24-ply pyramid laminated adhesive double strap butt joint. The second vessel was fabricated with the same number of plies in an inverted pyramid joint. Results from hydrostatic tests are presented. Experimental results were used as input to the computer programs GENLAM and Laminate, and the output compared to test. By using the axial stress resultant, the classical laminate theory results show a correlation within 1% to the experimental results in predicting the pressure vessel wall pressure performance. The prediction of joint stiffness for the two adhesive joints in the axial direction is within 1% of the experimental results. The calculated hoop direction joint stress resultant is 25% less than the measured resultant for both joint configurations. A correction factor is derived and used in the joint analysis. The correction factor is derived from the hoop stress resultant from the tank wall performance investigation. The vessel with the pyramid joint is determined to have failed in the joint area at a hydrostatic pressure 33% value below predicted failure. The vessel with the inverted pyramid joint failed in the wall acreage at a hydrostatic pressure within 10% of the actual failure pressure.

  10. 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 al...

  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. Joint attention by gaze interpolation and saliency

    NARCIS (Netherlands)

    Z. Yücel; A.A. Salah; C. Meriçli; T. Meriçli; R. Valenti; T. Gevers

    2013-01-01

    Joint attention, which is the ability of coordination of a common point of reference with the communicating party, emerges as a key factor in various interaction scenarios. This paper presents an image-based method for establishing joint attention between an experimenter and a robot. The precise ana

  13. High temperature ceramic/metal joint structure

    Science.gov (United States)

    Boyd, Gary L. (Inventor)

    1991-01-01

    A high temperature turbine engine includes a hybrid ceramic/metallic rotor member having ceramic/metal joint structure. The disclosed joint is able to endure higher temperatures than previously possible, and aids in controlling heat transfer in the rotor member.

  14. 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

  15. Healthcare joint ventures a CFO primer.

    Science.gov (United States)

    Boettiger, John R; Young, Teresa T

    2004-10-01

    Joint ventures can spread costs across the partners and bring in cash. Partners should be chosen carefully, taking into account expertise and resources offered, reputation, and benefits to be gained from the deal. Even after the joint venture is in place, it needs to be monitored regularly.

  16. SIBS-Philips joint lab in pipeline

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ The CAS Shanghai Institutes for Biological Sciences (SIBS) and the Royal Philips Electronics Ltd. announced on August 29, 2007 the establishment of a joint laboratory to conduct advanced research into molecular medicine. A memorandum of understanding has been signed for the joint venture.

  17. Physician joint ventures: new opportunities and risks.

    Science.gov (United States)

    Miller, Jeremy N

    2004-01-01

    Joint ventures involving physicians and institutions or lay investors had fallen out of favor in recent years because of concerns about transgressing government regulations. These regulations have now been clarified leading to a resurgent interest in these arrangements. This article outlines the business principles, control issues, legal setting, and the various modalities for joint venturing.

  18. 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

  19. Joint Ventures: A New Agenda for Education.

    Science.gov (United States)

    Griffin, Dean

    1989-01-01

    The author states that vocational education can join in partnerships with industry, labor, and government to contribute to economic development. Examples of current programs are included. The "joint venture" concept is explained and ideas for forming joint ventures are shared. (CH)

  20. Scanning for dollars. Joint ventures in imaging.

    Science.gov (United States)

    Miller, Jeremy N

    2003-04-01

    What are the latest models for joint ventures in medical imaging? What compliance obstacles do medical groups face? This article covers the opportunities and possible hazards of adding imaging services to your practice. Unless an imaging joint venture is both financially and legally feasible, it's not worth doing.

  1. 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...

  2. An Operant Analysis of Joint Attention Skills

    Science.gov (United States)

    Holth, Per

    2005-01-01

    Joint attention, a synchronizing of the attention of two or more persons, has been an increasing focus of research in cognitive developmental psychology. Research in this area has progressed mainly outside of behavior analysis, and behavior-analytic research and theory has tended to ignore the work on joint attention. It is argued here, on the one…

  3. The joint venture alternative to mergers.

    Science.gov (United States)

    Enders, R J

    1995-02-01

    However, while a joint venture may be "safe" from antitrust challenge, it is not without some practical difficulties, especially with respect to consolidating services at one location or jointly offering services provided at multiple facilities. These practical concerns include: 1. Who will exercise operational management of the joint venture? 2. How will the joint venture deal with different pricing for services that will be provided at multiple locations? 3. What criteria will be used to decide the location at which consolidated tertiary services will be offered? 4. In what circumstances can the joint venture be unwound, either in its entirety or as to discrete functions? When clinical services have been consolidated at one location, there is an appropriate concern by the other hospital that it will be unable to provide or re-enter the market for those services if the joint venture dissolves. These operational concerns, of course, are not addressed in the Consent Decree. Thus, even if a joint venture relationship survives antitrust scrutiny, the parties must still negotiate and resolve these operational issues in order for the joint venture to be viable.

  4. 24 CFR 570.308 - Joint requests.

    Science.gov (United States)

    2010-04-01

    ... DEVELOPMENT COMMUNITY FACILITIES COMMUNITY DEVELOPMENT BLOCK GRANTS Entitlement Grants § 570.308 Joint... 24 Housing and Urban Development 3 2010-04-01 2010-04-01 false Joint requests. 570.308 Section 570.308 Housing and Urban Development Regulations Relating to Housing and Urban Development...

  5. Calculation of tubular joints as compound shells

    Science.gov (United States)

    Golovanov, A. I.

    A scheme for joining isoparametric finite shell elements with a bend in the middle surface is described. A solution is presented for the problem of the stress-strain state of a T-joint loaded by internal pressure. A refined scheme is proposed for calculating structures of this kind with allowance for the stiffness of the welded joint.

  6. 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.

  7. 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.

  8. 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...

  9. Proceed with Caution: Advocating Joint Custody.

    Science.gov (United States)

    Hagen, Jan L.

    1987-01-01

    Joint custody, the newest child custody alternative following divorce, is intended to benefit and serve the best interests of children. Unintended consequences, however, have been relatively unexplored, which raises questions as to the viability of joint custody for all families, regardless of social class, race, or ethnicity. Until further…

  10. 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

  11. Joint Route Planning under Varying Market Conditions

    NARCIS (Netherlands)

    Cruijssen, F.C.A.M.; Braysy, O.; Dullaert, W.; Fleuren, H.A.; Salomon, M.

    2006-01-01

    Purpose - To provide empirical evidence on the level of savings that can be attained by joint route planning and how these savings depend on specific market characteristics.Design/methodology/approach - Joint route planning is a measure that companies can take to decrease the costs of their distribu

  12. 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

  13. 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

  14. Anatomy and histology of the sacroiliac joints.

    Science.gov (United States)

    Egund, Niels; Jurik, Anne Grethe

    2014-07-01

    The anatomy of joints provides an important basis for understanding the nature and imaging of pathologic lesions and their imaging appearance. This applies especially to the sacroiliac (SI) joints, which play a major role in the diagnosis of spondyloarthritis. They are composed of two different joint portions, a cartilage-covered portion ventrally and a ligamentous portion dorsally, and thus rather complex anatomically. Knowledge of anatomy and the corresponding normal imaging findings are important in the imaging diagnosis of sacroiliitis, especially by MR imaging. A certain distinction between the two joint portions by MR imaging is only obtainable by axial slice orientation. Together with a perpendicular coronal slice orientation, it provides adequate anatomical information and thereby a possibility for detecting the anatomical site of disease-specific characteristics and normal variants simulating disease. This overview describes current knowledge about the normal macroscopic and microscopic anatomy of the SI joints.

  15. 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.

  16. 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......, 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 joint pain after MoM trapeziometacarpal joint replacement based on published experiences from MoM hip...... prostheses and adverse reactions to metal....

  17. 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)

  18. 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

  19. 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.

  20. A New Method for Determination of Joint Roughness Coefficient of Rock Joints

    Directory of Open Access Journals (Sweden)

    Shigui Du

    2015-01-01

    Full Text Available The joint roughness coefficient (JRC of rock joints has the characteristic of scale effect. JRC measured on small-size exposed rock joints should be evaluated by JRC scale effect in order to obtain the JRC of actual-scale rock joints, since field rock joints are hardly fully exposed or well saved. Based on the validity analysis of JRC scale effect, concepts of rate of JRC scale effect and effective length of JRC scale effect were proposed. Then, a graphic method for determination of the effective length of JRC scale effect was established. Study results show that the JRC of actual-scale rock joints can be obtained through a fractal model of JRC scale effect according to the statistically measured results of the JRC of small-size partial exposed rock joints and by the selection of fractal dimension of JRC scale effect and the determination of effective length of JRC scale effect.

  1. 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.

  2. Joint ventures: to pursue or not to pursue?

    Science.gov (United States)

    Blaszyk, Michael D; Hill-Mischel, Jody

    2007-11-01

    Hospitals should carefully select joint venture partners. The joint venture evaluation process should involve a high-level screen of strategic opportunities. Hospitals should develop a full business plan for the joint venture.

  3. IMAGING OF HIP JOINT PATHOLOGIES

    Directory of Open Access Journals (Sweden)

    Parul Dutta

    2016-08-01

    Full Text Available The hip joint is a large and complex articulation and can be involved by numerous pathologic conditions like congenital and developmental, infective, arthritic, and neoplastic. Early diagnosis and characterisation of pathology has vital role in proper management and follow up of the disease for the clinicians. Present study was conducted in 45 patients who underwent clinical, radiological, and pathological examination in GMCH. Maximum no of patient between age group of 10-30 yrs. male-female ratio was 1.8:1 and 30% cases are unilateral. FSE STAIR images were most useful in delineating pathologies. Gadolinium-enhanced scan were used to evaluate the extent of the disease and the pattern of involvement. AVN was the most common pathology detected comprising 29%. The next common abnormality detected was infective arthritis found in 26% of cases. In case of Legg-Calve-Perthes disease, there was abnormal linear increase in the signal intensity at junction of the epiphyseal cartilage. Ultrasonography is useful for the screening of paediatric hip cases and also for guided aspiration for histopathology. CT scan shows better resolution of soft tissue then the radiograph. The importance of early diagnosis can be gauzed from the fact that early initiation of treatment creates the difference between a responsible, worthwhile life, and a cripple handicapped life. The role of imaging can never be undermined considering the fact that early suspicion and detection is within the realms of imaging.

  4. Joint implementation: A phased approach

    Energy Technology Data Exchange (ETDEWEB)

    Vellinga, P.; Heintz, R. [Vrije Universiteit, Amsterdam (Netherlands)

    1995-11-01

    What is Joint Implementation (JI)? In the Framework Convention on Climate Change (FCCC) it is described as a mechanism for cooperation between parties to meet the objective of the convention. Important considerations in favor of the introduction of the concept of JI are: (1) JI schemes could stimulate development and technology cooperation through generating (often private company) resources that would otherwise not be mobilized for such purposes, and thus stimulate broader participation in abatement measures. (2) The financial and societal cost for greenhouse gas abatement measures varies strongly among the parties to the FCCC. Given the global nature of the problem, national boundaries should not be barriers for the identification and implementation of cost effective schemes. Important reservations with regard to the introduction of the concept are: (1) The mechanism could be used by the developed countries to buy their way out of their obligation to take the lead in combating climate change. Ironically, JI could have the effect that the poorer countries with relatively low marginal costs for limiting emissions or enhancing sinks would be sponsored to adjust their pattern of development, while emissions in the richer countries would continue to grow. (2) At present, there exists considerable uncertainties with respect to a number of technical matters, such as measuring the net environmental effect of a JI project. However, these technical problems can probably be solved in due course (along with the findings of the IPCC and experiences gained with JI).

  5. 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...

  6. 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.

  7. 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.

  8. Coracoclavicular joint in a patient with cervicobrachialgy

    Directory of Open Access Journals (Sweden)

    Eraclio Delgado Rifá

    2015-11-01

    Full Text Available The coracoclavicular joint is a rare anomaly of the shoulder; it is described as a diarthrosic synovial joint between the clavicle and the coracoid process. This is a case of a 49-year-old dentist patient who came to the hospital complaining of pain on the right shoulder with an X-ray study that showed an anomalous joint between conoid tubercle of the clavicle and the upper surface of the horizontal part of the coracoid apophysis of the scapula. A comparative shoulder view was done and showed the bilateral presence of the anomaly, making inferences that the pain on the shoulder could be caused by this joint anomaly. Subsequent X-rays of cervical spine were done, due to the persistent pain and they showed marked degenerative changes on C5, C6 and C7 spaces. The final diagnosis was cervical spondylosis. The patient was treated with an intensive conservative treatment and the progressing was satisfactory in midterm period. Coracoclavicular joint is a rare anomalous joint and it was an accidental radiological finding, in this case and in most of the patients. The existence of the coracoclavicular joint is a fortuitous radiographic finding, as it is in this case, and the symptomatic variety of this anomaly is exceptional.

  9. Sealed joint structure for electrochemical device

    Science.gov (United States)

    Tucker, Michael C; Jacobson, Craig P; De Jonghe, Lutgard C; Visco, Steven J

    2013-05-21

    Several members make up a joint in a high-temperature electrochemical device, wherein the various members perform different functions. The joint is useful for joining multiple cells (generally tubular modules) of an electrochemical device to produce a multi-cell segment-in-series stack for a solid oxide fuel cell, for instance. The joint includes sections that bond the joining members to each other; one or more seal sections that provide gas-tightness, and sections providing electrical connection and/or electrical insulation between the various joining members. A suitable joint configuration for an electrochemical device has a metal joint housing, a first porous electrode, a second porous electrode, separated from the first porous electrode by a solid electrolyte, and an insulating member disposed between the metal joint housing and the electrolyte and second electrode. One or more brazes structurally and electrically connects the first electrode to the metal joint housing and forms a gas tight seal between the first electrode and the second electrode.

  10. 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).

  11. 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.

  12. 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.)

  13. Synovial Lipomatosis of the Glenohumeral Joint

    Directory of Open Access Journals (Sweden)

    Shaul Beyth

    2016-01-01

    Full Text Available Synovial lipomatosis (also known as lipoma arborescens is a rare and benign lesion affecting synovium-lined cavities. It is characterized by hyperplasia of mature fat tissue in the subsynovial layer. Although the most commonly affected site is the knee joint, rarely additional locations such as tendon sheath and other joints are involved. We present a case of synovial lipomatosis of the glenohumeral joint in a 44-year-old man. The clinical data radiological studies and histopathologic results are described, as well as a review of the current literature.

  14. Synovial Lipomatosis of the Glenohumeral Joint.

    Science.gov (United States)

    Beyth, Shaul; Safran, Ori

    2016-01-01

    Synovial lipomatosis (also known as lipoma arborescens) is a rare and benign lesion affecting synovium-lined cavities. It is characterized by hyperplasia of mature fat tissue in the subsynovial layer. Although the most commonly affected site is the knee joint, rarely additional locations such as tendon sheath and other joints are involved. We present a case of synovial lipomatosis of the glenohumeral joint in a 44-year-old man. The clinical data radiological studies and histopathologic results are described, as well as a review of the current literature.

  15. Joint custody: research, theory, and policy.

    Science.gov (United States)

    Coller, D R

    1988-12-01

    A majority of states have now enacted legislation addressing the issue of joint custody of children after divorce. This article examines current research on the subject, explores its implications for family theory, and attempts to draw some empirically based conclusions regarding policy. The literature would seem to support a structuralist view of the family and to undermine normative theories of the family life cycle. The author concludes that policy should not be aimed at developing a presumption of joint legal custody alone, but, rather, of joint physical custody with specified limitations.

  16. 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...

  17. 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.

  18. Total joint replacement preadmission programs.

    Science.gov (United States)

    Messer, B

    1998-01-01

    Patients begin to formulate their expectations of the postoperative hospitalization during the preadmission program. The challenge is to better understand the factors patients consider when formulating judgments about the quality of preadmission education. For example, it may be that perceptions of the preadmission program are influenced by what patients believe about their postoperative pain and functional abilities. Specific attention needs to be given both preoperatively and postoperatively to instructing patients on realistic expectations for recovery. One other method of measuring patient outcomes is with the Health Status Profile (SF-36) (Response Healthcare Information Management, 1995). The SF-36 approach emphasizes the outcome of medical care as the patient sees it, in addition to a clinical evaluation of successful health care. This form is currently initiated in the physician's office and returned for scanning at the preadmission class. The patient then completes another SF-36 at 6 months and every year thereafter to compare measurable outcomes. Patients intending to have elective total joint replacements experience anxiety and require much support and education. An effective preadmission program is a major investment in a patient's recovery, as well as a unique marketing tool to customers. Preadmission programs can be viewed as an opportunity to enhance customer satisfaction. Preadmission clinics are an excellent means for nurses to improve the quality of patient care through patient education. the overall goal of preadmission testing programs is to ensure patient preparedness while increasing quality health care and overall customer satisfaction. To enhance program effectiveness, health care providers must lead collaborative efforts to improve the efficiency of systems. PMID:9601410

  19. Total joint replacement preadmission programs.

    Science.gov (United States)

    Messer, B

    1998-01-01

    Patients begin to formulate their expectations of the postoperative hospitalization during the preadmission program. The challenge is to better understand the factors patients consider when formulating judgments about the quality of preadmission education. For example, it may be that perceptions of the preadmission program are influenced by what patients believe about their postoperative pain and functional abilities. Specific attention needs to be given both preoperatively and postoperatively to instructing patients on realistic expectations for recovery. One other method of measuring patient outcomes is with the Health Status Profile (SF-36) (Response Healthcare Information Management, 1995). The SF-36 approach emphasizes the outcome of medical care as the patient sees it, in addition to a clinical evaluation of successful health care. This form is currently initiated in the physician's office and returned for scanning at the preadmission class. The patient then completes another SF-36 at 6 months and every year thereafter to compare measurable outcomes. Patients intending to have elective total joint replacements experience anxiety and require much support and education. An effective preadmission program is a major investment in a patient's recovery, as well as a unique marketing tool to customers. Preadmission programs can be viewed as an opportunity to enhance customer satisfaction. Preadmission clinics are an excellent means for nurses to improve the quality of patient care through patient education. the overall goal of preadmission testing programs is to ensure patient preparedness while increasing quality health care and overall customer satisfaction. To enhance program effectiveness, health care providers must lead collaborative efforts to improve the efficiency of systems.

  20. 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.

  1. 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...

  2. 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...

  3. 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).

  4. Failure analyses of composite bolted joints

    Science.gov (United States)

    Wilson, D. W.; Gillespie, J. W.; York, J. L.; Pipes, R. B.

    1980-01-01

    The complex failure behavior exhibited by bolted joints of graphite epoxy (Hercules AS/3501) was investigated for the net tension, bearing and shearout failure modes using combined analytical and experimental techniques. Plane stress, linear elastic, finite element methods were employed to determine the two dimensional state of stress resulting from a loaded hole in a finite width, semiinfinite strip. The stresses predicted by the finite element method were verified by experiment to lend credence to the analysis. The influence of joint geometric parameters on the state of stress and resultant strength of the joint was also studied. The resulting functional relationships found to exist between bolted joint strength and the geometric parameters, were applied in the formulation of semiempirical strength models for the basic failure modes. A point stress failure criterion was successfully applied as the failure criterion for the net tension and shearout failure modes.

  5. 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.

  6. First metatarsophalangeal joint arthrodesis: current fixation options.

    Science.gov (United States)

    Moon, Jared L; McGlamry, Michael C

    2011-04-01

    This article reviews the current literature on first metatarsophalangeal joint arthrodesis rates using various forms of fixation, as well as reviewing biomechanical studies comparing the strengths of the different fixation options that are available.

  7. Choosing Your China Structure:Joint Ventures

    Institute of Scientific and Technical Information of China (English)

    RICHARD; HOFFMANN

    2009-01-01

    Forming a joint venture (JV) in China can be a successful endeavor as long as each side’s goals, contributions and responsibilities are mutual and understood. Unfortunately, this is not always the case,

  8. 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...

  9. 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 ...

  10. Interference Alignment for Clustered Multicell Joint Decoding

    CERN Document Server

    Chatzinotas, Symeon

    2010-01-01

    Multicell joint processing has been proven to be very efficient in overcoming the interference-limited nature of the cellular paradigm. However, for reasons of practical implementation global multicell joint decoding is not feasible and thus clusters of cooperating Base Stations have to be considered. In this context, intercluster interference has to be mitigated in order to harvest the full potential of multicell joint processing. In this paper, four scenarios of intercluster interference are investigated, namely a) global multicell joint processing, b) interference alignment, c) resource division multiple access and d) cochannel interference allowance. Each scenario is modelled and analyzed using the per-cell ergodic sum-rate capacity as a figure of merit. In this process, a number of theorems are derived for analytically expressing the asymptotic eigenvalue distributions of the channel covariance matrices. The analysis is based on principles from Free Probability theory and especially properties in the R a...

  11. Functionally Graded Adhesives for Composite Joints

    Science.gov (United States)

    Stapleton, Scott E.; Waas, Anthony M.; Arnold, Steven M.

    2012-01-01

    Adhesives with functionally graded material properties are being considered for use in adhesively bonded joints 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. An enhanced joint finite element, which uses an analytical formulation to obtain exact shape functions, is used to model the joint. 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.

  12. 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...

  13. 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.

  14. 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

  15. Generalized Models for Rock Joint Surface Shapes

    Directory of Open Access Journals (Sweden)

    Shigui Du

    2014-01-01

    Full Text Available Generalized models of joint surface shapes are the foundation for mechanism studies on the mechanical effects of rock joint surface shapes. Based on extensive field investigations of rock joint surface shapes, generalized models for three level shapes named macroscopic outline, surface undulating shape, and microcosmic roughness were established through statistical analyses of 20,078 rock joint surface profiles. The relative amplitude of profile curves was used as a borderline for the division of different level shapes. The study results show that the macroscopic outline has three basic features such as planar, arc-shaped, and stepped; the surface undulating shape has three basic features such as planar, undulating, and stepped; and the microcosmic roughness has two basic features such as smooth and rough.

  16. Nanoparticles Ease Aching Joints in Mice

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_161188.html Nanoparticles Ease Aching Joints in Mice Treatment might one ... News) -- New research in mice suggests that tiny nanoparticles might one day be a better way to ...

  17. 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.)

  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. 18 CFR 154.307 - Joint facilities.

    Science.gov (United States)

    2010-04-01

    ..., operation, maintenance, depreciation, taxes) that have been allocated to the natural gas operations involved in the subject rate change and are associated with joint facilities. The methods used in making...

  20. 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

  1. 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.)

  2. 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.

  3. 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.

  4. 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...

  5. 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...

  6. Periprosthetic Joint Infections: Clinical and Bench Research

    Directory of Open Access Journals (Sweden)

    Laurence Legout

    2013-01-01

    Full Text Available Prosthetic joint infection is a devastating complication with high morbidity and substantial cost. The incidence is low but probably underestimated. Despite a significant basic and clinical research in this field, many questions concerning the definition of prosthetic infection as well the diagnosis and the management of these infections remained unanswered. We review the current literature about the new diagnostic methods, the management and the prevention of prosthetic joint infections.

  7. Joint Source, Channel Coding, and Secrecy

    Directory of Open Access Journals (Sweden)

    Magli Enrico

    2007-01-01

    Full Text Available We introduce the concept of joint source coding, channel coding, and secrecy. In particular, we propose two practical joint schemes: the first one is based on error-correcting randomized arithmetic codes, while the second one employs turbo codes with compression, error protection, and securization capabilities. We provide simulation results on ideal binary data showing that the proposed schemes achieve satisfactory performance; they also eliminate the need for external compression and ciphering blocks with a significant potential computational advantage.

  8. Joint Source, Channel Coding, and Secrecy

    Directory of Open Access Journals (Sweden)

    Enrico Magli

    2007-09-01

    Full Text Available We introduce the concept of joint source coding, channel coding, and secrecy. In particular, we propose two practical joint schemes: the first one is based on error-correcting randomized arithmetic codes, while the second one employs turbo codes with compression, error protection, and securization capabilities. We provide simulation results on ideal binary data showing that the proposed schemes achieve satisfactory performance; they also eliminate the need for external compression and ciphering blocks with a significant potential computational advantage.

  9. 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...

  10. 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 ...

  11. 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...

  12. 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.

  13. 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

  14. Osteoma of temporomandibular joint: a rarity.

    Science.gov (United States)

    Misra, Neeta; Srivastava, Saurabh; Bodade, Pankaj R; Rastogi, Vikalp

    2013-09-06

    Osteoma is a benign tumour consisting of mature bone tissue. It is an uncommon lesion that occurs in the bones of the craniofacial complex. Only a few cases involving the temporomandibular joint have been reported. An osteoma of the left temporomandibular joint causing limited mouth opening in a 22-year-old man with CT findings revealing the unusual possibility in differential diagnosis of trismus.

  15. Doppler sonography of RA joints and LCAP

    OpenAIRE

    Kanno, Yukiko; Kobayashi, Hiroko; Suzuki, Eiji; Iwadate, Haruyo; Sasajima, Tomomi; Watanabe, Hiroshi; Ohira, Hiromasa

    2008-01-01

    Synovial vascularization in metacarpophalangeal joints of a patient with rheumatoid arthritis treated with leukocytapheresis (LCAP) was evaluated by Doppler sonography. After the treatment with LCAP, evaluation with American College of Rheumatology core set showed improvement, and the levels of C-reactive protein and serum amyloid A protein decreased. Power Doppler sonography demonstrated a reduction of color flow signals of the joints, and spectral Doppler sonography demonstrated an increase...

  16. A study of sandwich T-joints and composite lap joints

    Science.gov (United States)

    Turaga, Umamaheswar V. R. S.

    In this study, new efficient designs for adhesive sandwich T-joint and single-lap joint were proposed and investigated. In the proposed new sandwich T-joint, called U-channel joint, the load transfer path at the web-flange interface was modified to include a U-shaped aluminum channel which provides strong path for load transfer. Experimental results show that the new design has 62% more strength than the conventional circular fillet joint. The new U-channel joint was tested in tension, compression and bending to investigate its characteristics. It is found to have good performance in bending also, even though in compression it performs same as the circular fillet joint. An extensive parametric study was carried out to investigate the effect of parameters like flange skin stiffener, foam density, foam thickness in the web, and aluminum attachments. A fracture mechanics criterion based on the strain energy release rate was used to explain the failure modes, apart from the stress analysis explanation. The failure loads of the joints in compression were predicted using a maximum principal stress failure criterion based on the sandwich beam theory. A new single lap joint with attachments was proposed in the second phase of the research. The design was verified using both aluminum and composite materials. The new design was found to have 59% more strength than the single-lap joint. A parametric study was performed to find out the influence of the angle of attachment, thickness of attachment and the length of attachment. By careful consideration of design parameters, the joint can be optimized. Finally, the failure loads of the single lap joints with and without attachments were predicted using different failure criteria.

  17. Joint hypermobility leading to osteoarthrosis and chondrocalcinosis.

    Science.gov (United States)

    Bird, H A; Tribe, C R; Bacon, P A

    1978-06-01

    We have reviewed 21 adults referred to rheumatology clinic and considered to have generalised joint hypermobility by the criteria of Carter and Wilkinson (1964), modified by Beighton et al. (1973). They fell into two categories. 5 patients had a raised plasma viscosity (PV) and in each case a definite pathology was found to account for this, superimposed on hypermobile joints. The remaining 16 had a normal PV and this group was thought to represent the late natural history of hypermobility. 5 of these (aged 32 to 54 years) had no evidence of osteoarthrosis but the remaining 11 (aged 34 to 80 years) had widespread radiological osteoarthrosis. Synovial histology was obtained at arthroscopy in 6 of these patients and 4 (aged 60 to 75) had chondrocalcinosis. This previously undescribed finding may be the end result of hypermobile joints. Hypermobile patients with joint deformity (lax connective tissue), widespread synovial thickening (traumatic), and hot joint effusions (chondrocalcinosis) may mimic rheumatoid arthritis. They must be distinguished from patients who develop rheumatoid arthritis in hypermobile joints.

  18. 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

  19. 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

  20. 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...

  1. 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)....

  2. Blood-induced joint damage: from mechanisms to clinical practice

    NARCIS (Netherlands)

    Jansen, N.W.D.

    2008-01-01

    Blood-induced joint damage is an arthropathy which evolves as a consequence of joint bleeding (or: haemarthroses). These joint bleeds can occur as a consequence of joint trauma, such as intra-articular fracture or ligament rupture, but in patients suffering from the clotting disorder haemophilia, jo

  3. Measurement of joint space width and erosion size

    NARCIS (Netherlands)

    Sharp, JI; van der Heijde, D; Angwin, J; Duryea, J; Moens, HJB; Jacobs, JWG; Maillefert, JF; Strand, CV

    2005-01-01

    Measurement of radiographic abnormalities in metric units has been reported by several investigators during the last 15 years. Measurement of joint space in large joints has been employed in a few trials to evaluate therapy in osteoarthritis. Measurement of joint space width in small joints has been

  4. 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

  5. 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.

  6. 76 FR 9399 - ITS Joint Program Office; Pre-Proposal Safety Pilot Joint Bidders Conference; Notice of Public...

    Science.gov (United States)

    2011-02-17

    ... ITS Joint Program Office; Pre-Proposal Safety Pilot Joint Bidders Conference; Notice of Public Meeting...: Notice. The U.S. Department of Transportation ITS Joint Program Office (ITS JPO) is conducting a Pre... 11th day of February 2011. John Augustine, Managing Director, ITS Joint Program Office. BILLING...

  7. 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...

  8. 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...

  9. 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...

  10. 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.

  11. 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.

  12. 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.

  13. 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.

  14. 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.

  15. Acromioclavicular joint injuries: diagnosis and management.

    Science.gov (United States)

    Simovitch, Ryan; Sanders, Brett; Ozbaydar, Mehmet; Lavery, Kyle; Warner, Jon J P

    2009-04-01

    Acromioclavicular joint injuries represent nearly half of all athletic shoulder injuries, often resulting from a fall onto the tip of the shoulder with the arm in adduction. Stability of this joint depends on the integrity of the acromioclavicular ligaments and capsule as well as the coracoclavicular ligaments and the trapezius and deltoid muscles. Along with clinical examination for tenderness and instability, radiographic examination is critical in the evaluation of acromioclavicular joint injuries. Nonsurgical treatment is indicated for type I and II injuries; surgery is almost always recommended for type IV, V, and VI injuries. Management of type III injuries remains controversial, with nonsurgical treatment favored in most instances and reconstruction of the acromioclavicular joint reserved for symptomatic instability. Recommended techniques for stabilization in cases of acute and late symptomatic instability include screw fixation of the coracoid process to the clavicle, coracoacromial ligament transfer, and coracoclavicular ligament reconstruction. Biomechanical studies have demonstrated that anatomic acromioclavicular joint reconstruction is the most effective treatment for persistent instability.

  16. 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

  17. 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....

  18. Knee and ankle joint torque-angle relationships of multi-joint leg extension.

    Science.gov (United States)

    Hahn, Daniel; Olvermann, Matthias; Richtberg, Jan; Seiberl, Wolfgang; Schwirtz, Ansgar

    2011-07-28

    The force-length-relation (F-l-r) is an important property of skeletal muscle to characterise its function, whereas for in vivo human muscles, torque-angle relationships (T-a-r) represent the maximum muscular capacity as a function of joint angle. However, since in vivo force/torque-length data is only available for rotational single-joint movements the purpose of the present study was to identify torque-angle-relationships for multi-joint leg extension. Therefore, inverse dynamics served for calculation of ankle and knee joint torques of 18 male subjects when performing maximum voluntary isometric contractions in a seated leg press. Measurements in increments of 10° knee angle from 30° to 100° knee flexion resulted in eight discrete angle configurations of hip, knee and ankle joints. For the knee joint we found an ascending-descending T-a-r with a maximum torque of 289.5° ± 43.3 Nm, which closely matches literature data from rotational knee extension. In comparison to literature we observed a shift of optimum knee angle towards knee extension. In contrast, the T-a-r of the ankle joint vastly differed from relationships obtained for isolated plantar flexion. For the ankle T-a-r derived from multi-joint leg extension subjects operated over different sections of the force-length curve, but the ankle T-a-r derived from isolated joint efforts was over the ascending limb for all subjects. Moreover, mean maximum torque of 234.7 ± 56.6 Nm exceeded maximal strength of isolated plantar flexion (185.7 ± 27.8 Nm). From these findings we conclude that muscle function between isolated and more physiological multi-joint tasks differs. This should be considered for ergonomic and sports optimisation as well as for modelling and simulation of human movement.

  19. 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...

  20. Integrating engineering principles into the medico-legal investigation of a rare fatal rollover car accident involving complex dynamics.

    Science.gov (United States)

    Grassi, Vincenzo M; Castagnola, Flaminia; Miscusi, Massimo; De-Giorgio, Fabio

    2016-09-01

    Rollover car accidents can be the result of forceful steering or hitting an obstacle that acts like a ramp. Mortality from this type of car accident is particularly high, especially when occupants are thrown out of the vehicle. We report a case of a 67-year-old man who died after a rollover accident that occurred when he was driving a car equipped with a glass moonroof. He was found inside his car with his safety belt correctly fastened and the roof shattered. At autopsy, a wide avulsion injury of the head was observed, which was associated with an atlanto-axial dislocation and full-thickness fracture of the cervical body and posterior facet joints of the seventh cervical vertebra. The data collected at the scene of the accident were integrated with the autopsy results to yield a forensic engineering reconstruction. This reconstruction elucidated the dynamics of the event and correctly ascribed the lesions observed at autopsy to the phases of the rollover. Afterward, an analysis of the scientific literature concerning rollover crash tests was conducted to understand why the driver sustained fatal injuries even though his seatbelt was properly fastened. PMID:27406628

  1. Dystrophic calcinosis with both a huge calcified mass in the cervical spine and calcification in the chest wall in a patient with rheumatoid overlap syndrome.

    Science.gov (United States)

    Nakamura, Tadashi; Hirakawa, Kei; Takaoka, Hirokazu; Iyama, Ken-Ichi

    2016-05-01

    Dystrophic calcinosis in soft tissue occurs in damaged or devitalized tissues in the presence of normal calcium and phosphorous metabolism. It is often noted in subcutaneous tissues in patients with collagen vascular diseases and may involve a relatively localized area or be widespread. A 74-year-old Japanese woman with an overlap of rheumatoid arthritis, Sjögren's syndrome, and systemic sclerosis developed a huge tumor-like mass at the atlanto-axial vertebral joint region that caused severe cervical pain and difficulty in activities of daily living. She also had subcutaneous dystrophic calcification in the soft tissue of the chest wall. Calcinosis associated with systemic sclerosis is a well-recognized phenomenon, but a destructive paraspinal tumor in the cervical spine associated with overlap syndrome is extremely unique. Because calcinosis in spinal locations can be complicated by neurological involvement, patients with progressive symptoms may require surgical intervention. Surgical resection and biological therapy improved this patient's life and activities of daily living. Calcinosis is common in the conditions reviewed here, and different agents have been used for treatment. However, calcinosis management is poorly organized and lacks an accepted classification, systematic studies, and clinical therapeutic trials. The association of calcinosis and collagen vascular diseases is clinically and etiologically important. Although a combination of calcinosis and rheumatoid overlap syndrome is rare, various collagen vascular diseases may occur simultaneously. A perceptive diagnostic approach toward these diseases is critical, and early diagnosis and treatment are needed to prevent dystrophic calcinosis.

  2. Dystrophic calcinosis with both a huge calcified mass in the cervical spine and calcification in the chest wall in a patient with rheumatoid overlap syndrome.

    Science.gov (United States)

    Nakamura, Tadashi; Hirakawa, Kei; Takaoka, Hirokazu; Iyama, Ken-Ichi

    2016-05-01

    Dystrophic calcinosis in soft tissue occurs in damaged or devitalized tissues in the presence of normal calcium and phosphorous metabolism. It is often noted in subcutaneous tissues in patients with collagen vascular diseases and may involve a relatively localized area or be widespread. A 74-year-old Japanese woman with an overlap of rheumatoid arthritis, Sjögren's syndrome, and systemic sclerosis developed a huge tumor-like mass at the atlanto-axial vertebral joint region that caused severe cervical pain and difficulty in activities of daily living. She also had subcutaneous dystrophic calcification in the soft tissue of the chest wall. Calcinosis associated with systemic sclerosis is a well-recognized phenomenon, but a destructive paraspinal tumor in the cervical spine associated with overlap syndrome is extremely unique. Because calcinosis in spinal locations can be complicated by neurological involvement, patients with progressive symptoms may require surgical intervention. Surgical resection and biological therapy improved this patient's life and activities of daily living. Calcinosis is common in the conditions reviewed here, and different agents have been used for treatment. However, calcinosis management is poorly organized and lacks an accepted classification, systematic studies, and clinical therapeutic trials. The association of calcinosis and collagen vascular diseases is clinically and etiologically important. Although a combination of calcinosis and rheumatoid overlap syndrome is rare, various collagen vascular diseases may occur simultaneously. A perceptive diagnostic approach toward these diseases is critical, and early diagnosis and treatment are needed to prevent dystrophic calcinosis. PMID:24894107

  3. Clinical study of combined C2 laminar screw fixation technique for cervical vertebral injury%组合枢椎椎板螺钉固定技术治疗颈椎损伤的临床研究

    Institute of Scientific and Technical Information of China (English)

    胡勇; 马维虎; 徐荣明; 阮永平; 孙韶华

    2009-01-01

    目的 探讨组合枢椎椎板螺钉固定技术治疗颈椎损伤的可行性和应用价值.方法 对32具颈椎标本行枢椎椎板轴向CT加密扫描,测量枢椎椎板的长度、高度,枢椎椎板上、中、下部的厚度,椎板轴线与欠状面的夹角.8例颈椎损伤患者中,Anderson Ⅱ型齿状突骨折伴寰枢关节向后脱位2例、向前脱位1例、齿状突骨不愈合1例,Ⅲ型齿状突骨折伴寰枢关节不稳、横韧带撕裂2例,Ⅱ型Hangman骨折伴C不稳1例,寰枢关节前脱位伴横韧带断裂1例.牵引复位后,根据患者病情组合枢椎椎板螺钉进行组合式固定,并行后路自体髂骨植骨融合.结果 枢椎椎板的长度为(26.2±1.2)mm,高度为(12.8±1.6)mm,枢椎椎板上、中、下部的厚度分别为(300±1.4)mm、(6.0±1.6)mm、(5.6±1.2)mm、椎板轴线与矢状面的夹角平均为43.5°.8例患者枢椎椎板螺钉位于椎板中,无偏斜.全部患者随访6~14个月,平均10.5个月.术中和术后没有任何并发症发生,获得了良好的骨性愈合.本组无一例发生螺钉松动及断裂.结论 枢椎椎板螺钉固定技术避免了螺钉置入过程中损伤椎动脉的风险.此技术操作简单,不受C2横突孔中椎动脉的位置限制.全程在直视下进行,该方法可作为传统枢椎后路螺钉固定技术的补充.%Objective To explore the feasibility and application value of combined C2 laminar screw fixation technique in treatment of cervical vertebral injury. Methods Dense axial CT scanning was done on C2 laminar of 32 specimens of cervical vertebra to measure the length and height of the axis, the thickness of upper, middle and lower parts of the axis as well as the angle between the axial ray and the sagittal plane. There were eight patients with cervical vertebral injury including two with type Ⅱ odon-told process fractures combined with backward dislocation of atlanto-axial joint, one with forward disloca-tion of atlanto-axial joint, one with nonunion

  4. Integrating engineering principles into the medico-legal investigation of a rare fatal rollover car accident involving complex dynamics.

    Science.gov (United States)

    Grassi, Vincenzo M; Castagnola, Flaminia; Miscusi, Massimo; De-Giorgio, Fabio

    2016-09-01

    Rollover car accidents can be the result of forceful steering or hitting an obstacle that acts like a ramp. Mortality from this type of car accident is particularly high, especially when occupants are thrown out of the vehicle. We report a case of a 67-year-old man who died after a rollover accident that occurred when he was driving a car equipped with a glass moonroof. He was found inside his car with his safety belt correctly fastened and the roof shattered. At autopsy, a wide avulsion injury of the head was observed, which was associated with an atlanto-axial dislocation and full-thickness fracture of the cervical body and posterior facet joints of the seventh cervical vertebra. The data collected at the scene of the accident were integrated with the autopsy results to yield a forensic engineering reconstruction. This reconstruction elucidated the dynamics of the event and correctly ascribed the lesions observed at autopsy to the phases of the rollover. Afterward, an analysis of the scientific literature concerning rollover crash tests was conducted to understand why the driver sustained fatal injuries even though his seatbelt was properly fastened.

  5. Solder Joint Health Monitoring Testbed System

    Science.gov (United States)

    Delaney, Michael M.

    2009-01-01

    The density and pin count for Field Programmable Gate Arrays (FPGAs) has been increasing, and has exceeded current methods of solder joint inspection, making early detection of failures more problematic. These failures are a concern for both flight safety and maintenance in commercial aviation. Ridgetop Group, Inc. has developed a method for detecting solder joint failures in real time. The NASA Dryden Flight Research Center is developing a set of boards to test this method in ground environmental and accelerated testing as well as flight test on a Dryden F-15 or F-18 research aircraft. In addition to detecting intermittent and total solder joint failures, environmental data on the boards, such as temperature and vibration, will be collected and time-correlated to aircraft state data. This paper details the technical approach involved in the detection process, and describes the design process and products to date for Dryden s FPGA failure detection boards.

  6. 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.

  7. Acromioclavicular joint injuries: anatomy, diagnosis, and treatment.

    Science.gov (United States)

    Willimon, S Clifton; Gaskill, Trevor R; Millett, Peter J

    2011-02-01

    Acromioclavicular (AC) joint injuries are common in athletic populations and account for 40% to 50% of shoulder injuries in many contact sports, including lacrosse, hockey, rugby and football. The AC joint is stabilized by static and dynamic restraints, including the coracoclavicular (CC) ligaments. Knowledge of these supporting structures is important when identifying injury and directing treatment. Management of AC injuries should be guided by severity of injury, duration of injury and symptoms, and individual patient factors. These help determine how best to guide management, and whether patients should be treated surgically or nonsurgically. Treatment options for AC injuries continue to expand, and include arthroscopic-assisted anatomic reconstruction of the CC ligaments. The purpose of this article is to review the anatomy, diagnostic methods, and treatment options for AC joint injuries. In addition, the authors' preferred reconstruction technique and outcomes are presented.

  8. ESA's experience with managing joint international projects

    Science.gov (United States)

    Bolton, Gordon R.

    The European Space Agency (formerly ESRO), has been involved in joint international projects since its inception in 1962. These started with familiarising of European staff in space matters in the United States and the launching of the European scientific satellites (ESRO II, ESRO I and HEOS I) with US provided launchers. Then followed several joint space science missions: the International Sun-Earth Explorer (ISEE), the International Ultraviolet Explorer (IUE), the Hubble Space Telescope and Ulysses the International Solar Polar mission. Applications programmes in the post Apollo era led to a joint programme with the US Space Shuttle in which the European effort resulted in the Spacelab element still in use today. Subsequently ESA is involved in the International Space Station Program Freedom with its Columbus programme. This paper summarises these international activities from the European standpoint. It points out the motivations, benefits and difficulties experienced in each programme and the lessons learnt which could be used in any future international cooperative ventures.

  9. 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.

  10. 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

  11. Joint Grid System Used in Embedding Technique

    Institute of Scientific and Technical Information of China (English)

    李孝伟; 范绪箕

    2003-01-01

    The joint grid system, which consists of the developed collar grid, the virtual grid and other grids, wasused in the embedding technique to solve the problem of finding interpolating cells of the internal and externalboundary points near the joint regions. With different boundary plane generated along different fixed surface, thecollar grid obtained using hyperbolic partial equations can ensure to generate high-quality grids and to provide realinterpolating cells for the boundary points in the blanking regions. The virtual grid was used to convert solid wallboundary conditions into an interface condition, however, no fluid flow computations were conducted within thevirtual grid. The computational result of body-strake-wing shows that the current developed embedding techniquewith joint grid system can effectively treat the geometry and can more accurately predict the flow over complexcon-figuration with intersecting surfaces.

  12. Imaging of the temporomandibular joint: An update

    Institute of Scientific and Technical Information of China (English)

    Asim; K; Bag; Santhosh; Gaddikeri; Aparna; Singhal; Simms; Hardin; Benson; D; Tran; Josue; A; Medina; Joel; K; Curé

    2014-01-01

    Imaging of the temporomandibular joint(TMJ) is continuously evolving with advancement of imaging technologies. Many different imaging modalities are currently used to evaluate the TMJ. Magnetic resonance imaging is commonly used for evaluation of the TMJ due to its superior contrast resolution and its ability to acquire dynamic imaging for demonstration of the functionality of the joint. Computed tomography and ultrasound imaging have specific indication in imaging of the TMJ. This article focuses on state of the art imaging of the temporomandibular joint. Relevant normal anatomy and biomechanics of movement of the TMJ are discussed for better understanding of many TMJ pathologies. Imaging of internal derangements is discussed in detail. Different arthropathies and commontumors are also discussed in this article.

  13. Arthroscopical treatment of elbow joint disease

    Directory of Open Access Journals (Sweden)

    C.M.F. Rezende

    2012-02-01

    Full Text Available Elbow arthroscopy was performed in 30 dogs of different breeds. The procedure was performed bilaterally in 20 of these dogs, yielding a total of 50 joints. Different lesions were found, varying from cartilage fissures (8 to fragmentation (42 of medial coronoid process (FCP of the ulna. Osteochondritis dissecans (OCD of the humerus medial condyle was associated in four of them. All of these cases displayed varying degrees of synovitis. Osteoarthrosis (OA in varying intensity was observed in 44 joints. The majority of cases were treated two to four months after the manifestation of clinical signs. Good clinical recovery occurred in dogs with minimal joint lesions, where these were diagnosed and treated within four weeks of the onset of clinical symptoms. Early diagnosis and arthroscopic treatment prevent osteoarthrosis and preserve locomotor function.

  14. 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.

  15. 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

  16. 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...

  17. 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.

  18. 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.

  19. 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

  20. 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

  1. 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.

  2. 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

  3. Research Joint Ventures, Licensing, and Industrial Policy

    OpenAIRE

    Fan, Cuihong; Wolfstetter, Elmar G.

    2005-01-01

    This paper reconsiders the explanation of R&D subsidies by Spencer and Brander (1983) and others by allowing firms to license their innovations and to pool their R&D investments. We show that in equilibrium R&D joint ventures are formed and licensing occurs in a way that eliminates the strategic benefits of R&D investment in the export oligopoly game. Nevertheless, national governments are driven to subsidize their own national firms in order to increase their strength in the joint venture ba...

  4. Recent Corrosion Research Trends in Weld Joints

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Hwan Tae; Kil, Sang Cheol [Korea Institute of Science and Technology Information, Seoul (Korea, Republic of); Hwang, Woon Suk [Inha University, Incheon (Korea, Republic of)

    2007-04-15

    The increasing interest in the corrosion properties of weld joints in the corrosive environment is placing stringent demands on the manufacturing techniques and performance requirements, and the manufacture employs the high quality and efficiency welding process to produce welds. Welding plays an important role in the fabrication of chemical plants, nuclear power plant, ship construction, and this has led to an increasing attention to the corrosion resistant weld joints. This paper covers recent technical trends of welding technologies for corrosion resistance properties including the COMPENDEX DB analysis of welding materials, welding process, and welding fabrications

  5. 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.

  6. A new shoulder model with a biologically inspired glenohumeral joint.

    Science.gov (United States)

    Quental, C; Folgado, J; Ambrósio, J; Monteiro, J

    2016-09-01

    Kinematically unconstrained biomechanical models of the glenohumeral (GH) joint are needed to study the GH joint function, especially the mechanisms of joint stability. The purpose of this study is to develop a large-scale multibody model of the upper limb that simulates the 6 degrees of freedom (DOF) of the GH joint and to propose a novel inverse dynamics procedure that allows the evaluation of not only the muscle and joint reaction forces of the upper limb but also the GH joint translations. The biomechanical model developed is composed of 7 rigid bodies, constrained by 6 anatomical joints, and acted upon by 21 muscles. The GH joint is described as a spherical joint with clearance. Assuming that the GH joint translates according to the muscle load distribution, the redundant muscle load sharing problem is formulated considering as design variables the 3 translational coordinates associated with the GH joint translations, the joint reaction forces associated with the remaining kinematic constraints, and the muscle activations. For the abduction motion in the frontal plane analysed, the muscle and joint reaction forces estimated by the new biomechanical model proposed are similar to those estimated by a model in which the GH joint is modeled as an ideal spherical joint. Even though this result supports the assumption of an ideal GH joint to study the muscle load sharing problem, only a 6 DOF model of the GH joint, as the one proposed here, provides information regarding the joint translations. In this study, the biomechanical model developed predicts an initial upward and posterior migration of the humeral head, followed by an inferior and anterior movement, which is in good agreement with the literature. PMID:27381499

  7. 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 ...

  8. Be vigilant for secondary periprosthetic joint infection.

    Science.gov (United States)

    Jenkins, Paul J; Phillips, Sally-Anne; Gaston, Paul; Dave, Jayshree; Breusch, Steffen J

    2010-10-01

    Periprosthetic joint infection (PJI) is caused by haematogenous spread from a distant primary infection in 70% of deep infections. It can potentially be avoided by prompt recognition and treatment of the primary infection focus in susceptible patients. Streptococci are commonly implicated in such secondary infections. Group A, B, C and G streptococci can cause invasive, potentially life-threatening infection. Risk factors include diabetes, immunodeficiency and venous insufficiency Any patient with a joint replacement should be counselled to seek early attention for any soft tissue or dental infection. A course of antibiotics should be considered in any wound in which there has been significant contamination. Patients at risk of infection through impaired physical defences such as chronic venous insufficiency should be treated appropriately and consideration should be given to prophylactic treatment of varicose veins if there are early signs of chronic venous insufficiency. Mild, uncomplicated cellulitis can be treated with oral antibiotics, simple penicillin agents such as amoxicillin or flucloxacillin should be administered. Patients should be referred to hospital for consideration of parenteral antibiotics if they are exhibiting signs of systemic sepsis such as tachycardia, pyrexia or hypotension. PJI should be suspected if a patient with a joint replacement develops pain in that joint after a soft tissue, respiratory tract or dental infection. In cases of suspected PJI prompt orthopaedic advice should be sought and antibiotics withheld.

  9. 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.

  10. 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.)

  11. 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.

  12. Jointly Maintain Peace, Cooperation and Development

    Institute of Scientific and Technical Information of China (English)

    Tao; Tao

    2015-01-01

    A Speech at China-Mongolia-Russia Trilateral Civil Dialogue&the; International Peace and Security and Promoting Cooperation:the Ulan Bator Meeting Participated by China,Russia and MongoliaI am very happy meeting with Mongolian and Russian friends in beautiful Ulan Bator to jointly discuss peace issues,work on cooperation strategies,and promote development policies.

  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. Shell Expands Polystyrene Joint Venture in China

    Institute of Scientific and Technical Information of China (English)

    1997-01-01

    @@ Shell China Ltd. and Shell China Holdings BV, both wholly owned subsidiaries and part of the Royal Dutch/Shell Group of Companies, have signed a joint-venture agreement with Jinling Petrochemical Corporation (JPC) on October 17, 1997, in Nanjing, the East China's Jiangsu Province.

  15. 2017 Joint Universities Accelerator School (JUAS) - Registrations

    CERN Multimedia

    2016-01-01

    The registrations for the 2017 session of the Joint Universities Accelerator School (JUAS) are now open.   Applications are welcome from staff, fellows and post-graduate students wishing to further their knowledge in the field. The deadline for submission of the full application form is 16 October 2016.

  16. 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.

  17. 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.

  18. 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…

  19. MIT Experiments with Joint Venture Contract.

    Science.gov (United States)

    American School and University, 1981

    1981-01-01

    A new dormitory at Massachusetts Institute of Technology was constructed using a joint venture contract with safeguards and incentives that brought university, architect, and building contractor into a closer and more productive relationship than under conventional contract arrangements. (Author/MLF)

  20. Joint Venture Structuring in Restricted Industries

    Institute of Scientific and Technical Information of China (English)

    CHRIS; DEVONSHIRE-ELLIS

    2008-01-01

    When investing in China’s restricted in- dustries, it is essential to have a joint venture (JV) partner. Often the maximum percent- age of equity allowed in foreign ownership can only be 50 percent. So what options are available to the foreign investor to mitigate the risk of not owning, on paper, a majority

  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. 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…

  4. 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.

  5. 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].

  6. 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...

  7. 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

  8. Joint Control: A Discussion of Recent Research

    Science.gov (United States)

    Palmer, David C.

    2006-01-01

    The discrimination of the onset of joint control is an important interpretive tool in explaining matching behavior and other complex phenomena, but the difficulty of getting experimental control of all relevant variables stands in the way of a definitive experiment. The studies in the present issue of "The Analysis of Verbal Behavior" illustrate…

  9. RADIOSYNOVIORTHESIS IN THERAPY FOR INFLAMMATORY JOINT DISORDERS

    Directory of Open Access Journals (Sweden)

    Valerii Vasilyevich Krylov

    2013-01-01

    Full Text Available Radiosynoviorthesis (RSO, also known as radiosynovectomy, is an approved method of treatment for inflammatory joint disorders that is commonly used both in the industrialized American and European countries as well as in the developing Asian and African countries. In terms of frequency of its use, this method ranks second among all the methods for radionuclide therapy in Germany. The treatment includes intra-articular administration of radiopharmaceuticals as microparticles (colloidal forms, macroaggregates, or microspheres containing radioactive isotopes, which are rapidly phagocytized by the synovial membrane cells. Indications for therapy include inflammatory joint disorders of different genesis: rheumatoid arthritis, psoriatic arthritis, osteoarthritis and intra-articular effusion after joint endoprosthetics. RSO is the optimal method for local therapy for arthritis in patients with hemophilic arthropathy, since it both heals the inflammation and reduces the frequency of bleeding relapses. This aspect is of particular significance for the developing countries where the disease is often complicated by arthropathies due to the lack of coagulation factor. The main advantages include the low frequency of undesired reactions and low radiation burden to a patient. Depending on the degree to which a joint is affected, the frequency of responses to therapy is 50–80%, reaching 90% in patients with hemophilic arthropathy.

  10. Agency and the construction of joint activity

    DEFF Research Database (Denmark)

    Krummheuer, Antonia Lina

    to perform certain exercises e.g. lifting a patient with a sling into a wheelchair. Analysis shows that therapists often help patients to accomplish certain actions in a way which constructs actions as “joint venture”. My data show that therapists announce the action the patient will have to perform, thereby...

  11. 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.

  12. Starting a joint venture kidney stone center.

    Science.gov (United States)

    Russel, K; McFarlin, C

    1989-12-01

    When considering a joint venture, hospitals should evaluate the risks and benefits associated with cooperating with a major competitor. Factors to be analyzed during the decision-making process include: goals, medical staff involvement, corporate strategies, financial considerations, volume considerations, market share, environmental influences and level of competition. Hospitals can join forces to extend their medical services into new areas.

  13. Planning an ambulatory care joint venture.

    Science.gov (United States)

    Harpster, L M

    1988-01-01

    This article discusses ambulatory care joint ventures by hospitals and selected members of their medical staffs and emphasizes the resolution of problems in the early planning stages. Failure to follow an orderly and thoughtful planning process not only risks valuable resources of the venture partners, but also jeopardizes the working relationship between the hospital and its medical staff.

  14. 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.

  15. 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.

  16. 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

  17. 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

  18. 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.

  19. Hysteresis modeling of clamp band joint with macro-slip

    Science.gov (United States)

    Qin, Zhaoye; Cui, Delin; Yan, Shaoze; Chu, Fulei

    2016-01-01

    Clamp band joints are commonly used to connect spacecrafts with launch vehicles. Due to the frictional slippage between the joint components, hysteresis behavior might occur at joint interfaces under cyclic loading. The joint hysteresis will bring friction damping into the launching systems. In this paper, a closed-form hysteresis model for the clamp band joint is developed based on theoretical and numerical analyses of the interactions of the joint components. Then, the hysteresis model is applied to investigating the dynamic response of a payload fastened by the clamp band joint, where the nonlinearity and friction damping effects of the joint is evaluated. The proposed analytical model, which is validated by both finite element analyses and quasi-static experiments, has a simple form with sound accuracy and can be incorporated into the dynamic models of launching systems conveniently.

  20. 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.

  1. Joint ventures: the trends and the potential pitfalls.

    Science.gov (United States)

    Wolff, S O

    1985-10-01

    Perhaps the hottest trend today in the health care field is the formation of joint ventures by hospitals and physicians. This article examines some of the critical success factors and the potential pitfalls of hospital physician joint venture arrangements.

  2. 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)

  3. 78 FR 55338 - ITS Joint Program Office; Notice of Meeting

    Science.gov (United States)

    2013-09-10

    ... Research and Innovative Technology Administration ITS Joint Program Office; Notice of Meeting AGENCY..., DC. The ITS Joint Program Office is considering rescheduling the meeting for a future date. In the... on September 24 to 26, 2013. For more information, visit...

  4. 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...

  5. 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

  6. 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 ...

  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. How providers can preserve mutually beneficial joint ventures.

    Science.gov (United States)

    Hoffman, S W; Olson, C E; Shirilla, P M

    1992-09-01

    Joint ventures between hospitals and physicians were formed at a dizzying pace during the 1980s. Many of these joint ventures are now a source of concern for both hospital and physician partners. In the following article, the authors discuss their experience with joint ventures in the wake of recent and proposed regulatory and legislative activity and present several practical strategies for hospital executives to consider regarding their joint ventures.

  9. 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...

  10. 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...

  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. 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...

  13. 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...

  14. 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

  15. 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...

  16. 30 CFR 281.13 - Joint State/Federal coordination.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Joint State/Federal coordination. 281.13....13 Joint State/Federal coordination. (a) The Secretary may invite the adjacent State Governor(s) to... a State/Federal task force or some other joint planning or coordination arrangement when...

  17. 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.

  18. 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...

  19. Effect of Solder Joint Length on Fracture Under Bending

    Science.gov (United States)

    Akbari, Saeed; Nourani, Amir; Spelt, Jan K.

    2016-01-01

    Fracture tests were conducted on copper-solder-copper joints of various lengths using double-cantilever-beam (DCB) specimens under mode I loading conditions. The thickness and length of the solder joints were large enough to neglect any anisotropy associated with the solder microstructure. It was found that the critical strain energy release rate at crack initiation, G ci, was insensitive to the length of the solder joint; however, for joints shorter than a characteristic length which was a function of the thickness and the mechanical properties of the solder layer and the substrates, the fracture load increased with increasing solder joint length. A sandwich model was developed for the analysis of the stress and strain in solder joints, taking into account the influence of both the bending deformation and the shear deformation of the substrates on the solder joint stresses. Consistent with the experimental results, it was found that solder joints longer than the characteristic length have a maximum peel stress that remains unchanged with joint length, causing the joint strength to become independent of the joint length. A closed-form analytical solution was developed for the characteristic length of DCB specimens under mode I loading. The experimental results were in good agreement with the analytical model and with finite element results. The generality of the G ci failure criterion was demonstrated by comparing the experimental results and the fracture load predictions of mode I DCB solder joints with different lengths.

  20. Joint ventures in health care: more than a sideline business.

    Science.gov (United States)

    Kaufman, K; Hall, M; Higgins, D

    1986-05-01

    Many times, healthcare joint ventures are considered second class, sideline businesses, and consequently, are not viewed as complex business relationships. However, compared to other small enterprises, the joint venture presents a complex list of legal and practical issues that must be understood and resolved. Such issues as organizational form, antitrust, reimbursement, licensing, and securities laws must be considered to ensure a successful joint venture.

  1. 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...

  2. Hospital-physician joint ventures: maximizing the potential.

    Science.gov (United States)

    Pizzo, James J; Redd, Lewis

    2006-11-01

    Four primary hospital-physician models are per-click service agreements, management services agreements, gainsharing, and equity joint ventures. Four key attributes needed for successful joint ventures are clinical quality, customer satisfaction, operational effectiveness, and financial soundness. Hospitals and physicians need to approach joint ventures with expectations of high performance.

  3. An osteological and histological investigation of cranial joints in geckos.

    Science.gov (United States)

    Payne, Samantha L; Holliday, Casey M; Vickaryous, Matthew K

    2011-03-01

    Cranial kinesis is a widespread feature of gekkotan lizards. Previous studies of kinesis in lizards often described the relevant, mobile joints as synovial, thus characterized by the presence of a synovial cavity lined with articular cartilage. To date however, detailed investigations of cranial joint histology are lacking. We examined eight cranial joints (quadrate-articular, quadrate-pterygoid, quadrate-otooccipital, quadrate-squamosal, epipterygoid-prootic, epipterygoid-pterygoid, basisphenoid-pterygoid, and frontal-parietal) in five gekkotan species (Oedura lesueuerii, Eublepharis macularius, Hemitheconyx caudicinctus, Tarentola annularis, and Chondrodactylous bibronii) using microcomputed tomography and serial histology. Particular focus was given to the relationship between the bony and soft-tissue components of the joint. Our results demonstrate that only three of these joints are synovial: the quadrate-articular, epipterygoid-pterygoid, and basisphenoid-pterygoid joints. The frontal-parietal and quadrate-pterygoid joints are syndesmosis (fibrous), the epipterygoid-prootic and quadrate-otooccipital joints are synchondroses (cartilaginous without a synovial cavity) and the quadrate-squamosal joint was not present. Based on previous descriptions, we determine that the structure of some cranial joints is variable among lizard taxa. We caution that osteology does not necessarily predict cranial joint histology. Although the functional implications of these findings remain to be explored we note that the development of synovial joints appears to be associated with a neural crest origin for the elements involved.

  4. 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.

  5. 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...

  6. Charcot-like joints in calcium pyrophosphate dihydrate deposition disease

    Energy Technology Data Exchange (ETDEWEB)

    Helms, C.A.; Chapman, G.S.; Wild, J.H.

    1981-10-01

    Two cases of Charcot-like joints in patients with pseudogout who were otherwise neurologically intact are presented. The arthropathy of pseudogout should include Charcot-like joints and it is emphasized that an apparent Charcot joint should raise the question of pseudogout.

  7. 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

  8. Reliability Analysis of Tubular Joints in Offshore Structures

    DEFF Research Database (Denmark)

    Thoft-Christensen, Palle; Sørensen, John Dalsgaard

    1987-01-01

    Reliability analysis of single tubular joints and offshore platforms with tubular joints is" presented. The failure modes considered are yielding, punching, buckling and fatigue failure. Element reliability as well as systems reliability approaches are used and illustrated by several examples....... Finally, optimal design of tubular.joints with reliability constraints is discussed and illustrated by an example....

  9. Essays on equity joint ventures, uncertainty and experience

    NARCIS (Netherlands)

    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

  10. 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...

  11. 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 seams... 49 Transportation 4 2010-10-01 2010-10-01 false Lap-joint seam boilers. 230.30 Section...

  12. 49 CFR 388.6 - Joint investigation, inspection, or examination.

    Science.gov (United States)

    2010-10-01

    ... person who will supervise the joint effort and make the necessary decisions. Any agent or employee of... 49 Transportation 5 2010-10-01 2010-10-01 false Joint investigation, inspection, or examination... REGULATIONS COOPERATIVE AGREEMENTS WITH STATES § 388.6 Joint investigation, inspection, or examination....

  13. 20 CFR 901.51 - Decision of the Joint Board.

    Science.gov (United States)

    2010-04-01

    ... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false Decision of the Joint Board. 901.51 Section... Termination of Enrollment § 901.51 Decision of the Joint Board. On appeal from or review of the initial decision of the Administrative Law Judge, the Joint Board for the Enrollment of Actuaries will make...

  14. 20 CFR 901.50 - Appeal to the Joint Board.

    Science.gov (United States)

    2010-04-01

    ... Administrative Law Judge's decision, either party may appeal to the Joint Board for the Enrollment of Actuaries... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false Appeal to the Joint Board. 901.50 Section 901.50 Employees' Benefits JOINT BOARD FOR THE ENROLLMENT OF ACTUARIES REGULATIONS GOVERNING...

  15. [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

  16. 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

  17. 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.

  18. Gnathological splint therapy in temporomandibular joint disorder

    Directory of Open Access Journals (Sweden)

    K Gnanashanmugham

    2015-01-01

    Full Text Available Temporomandibular joint (TMJ forms an integral functional part of stomatognathic system. Position, shape, structure and function of teeth have an influence on the proper functioning and health of TMJ. But a problem associated with TMJ is often neglected, and treatment for it is mostly restricted to palliative therapy. A proper understanding of the underlying cause of temporomandibular joint disorder (TMD is necessary to device a proper treatment plan. Etiology of TMDs varies from idiopathic reasons to systemic disorders. The option of Gnathological splint is a conservative, safe and an effective mode of therapy for TMDs caused by occlusal discrepancies (fulcrum/interferences. This article presents a case report of a patient with TMD caused by occlusal discrepancy

  19. 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 analysing...

  20. 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

  1. Image Magnification Method Using Joint Diffusion

    Institute of Scientific and Technical Information of China (English)

    Zhong-Xuan Liu; Hong-Jian Wang; Si-Long Peng

    2004-01-01

    In this paper a new algorithm for image magnification is presented. Because linear magnification/interpolation techniques diminish the contrast and produce sawtooth effects, in recent years, many nonlinear interpolation methods, especially nonlinear diffusion based approaches, have been proposed to solve these problems. Two recently proposed techniques for interpolation by diffusion, forward and backward diffusion (FAB) and level-set reconstruction (LSR), cannot enhance the contrast and smooth edges simultaneously. In this article, a novel Partial Differential Equations (PDE) based approach is presented. The contributions of the paper include:firstly, a unified form of diffusion joining FAB and LSR is constructed to have all of their virtues; secondly, to eliminate artifacts of the joint diffusion, soft constraint takes the place of hard constraint presented by LSR;thirdly, the determination of joint coefficients, criterion for stopping time and color image processing are also discussed. The results demonstrate that the method is visually and quantitatively better than Bicubic, FAB and LSR.

  2. 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

  3. 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.

  4. Robotic Joints Support Horses and Humans

    Science.gov (United States)

    2008-01-01

    A rehabilitative device first featured in Spinoff 2003 is not only helping human patients regain the ability to walk, but is now helping our four-legged friends as well. The late James Kerley, a prominent Goddard Space Flight Center researcher, developed cable-compliant mechanisms in the 1980s to enable sounding rocket assemblies and robots to grip or join objects. In cable-compliant joints (CCJs), short segments of cable connect structural elements, allowing for six directions of movement, twisting, alignment, and energy damping. Kerley later worked with Goddard s Wayne Eklund and Allen Crane to incorporate the cable-compliant mechanisms into a walker for human patients to support the pelvis and imitate hip joint movement.

  5. 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.

  6. Implant arthroplasty for the distal radioulnar joint.

    Science.gov (United States)

    Scheker, Luis R

    2008-11-01

    The distal radioulnar joint (DRUJ) is a weight-bearing joint; the ulnar head is frequently excised either totally or partially and in some cases is fused because of degenerative, rheumatoid, or posttraumatic arthritis and treated with a "salvage procedure." The result of these procedures is the inability of those patients to lift even minor weight. Articles about these procedures report the ability to pronate and supinate, but they rarely discuss grip strength or lifting capacity. We present an alternative to the salvage procedures that allows full range of motions as well as the ability to grip and lift weights encountered in daily living, such as a gallon of milk. The Aptis total DRUJ replacement prosthesis (Aptis Medical, Louisville, KY), a bipolar self-stabilizing DRUJ endoprosthesis, restores the forearm function. The technique of implantation is presented here.

  7. 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.

  8. 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...

  9. Diagnosing patients with longstanding shoulder joint pain

    DEFF Research Database (Denmark)

    Nørregaard, J; Krogsgaard, M R; Lorenzen, T;

    2002-01-01

    OBJECTIVE: To examine the interobserver agreement of commonly used clinical tests and diagnoses in patients with shoulder pain, and the accuracy of these tests and ultrasonographic findings in comparison with arthroscopic findings. METHODS: Eighty six patients with longstanding shoulder joint pain...... lesion also showed poor agreement. Pain during muscle contraction showed moderate agreement. The agreement of clinical diagnoses was poor and the accuracy was low in comparison with arthroscopy. Ultrasonography was accurate in full thickness supraspinatus tendon tears, but inaccurate for partial tears...

  10. Some realizable joint measurements of complementary observables

    Science.gov (United States)

    Busch, Paul

    1987-09-01

    Noncommuting quantum observables, if considered as unsharp observables, are simultaneously measurable. This fact is exemplified for complementary observables in two-dimensional state spaces. Two proposals of experimentally feasible joint measurements are presented for pairs of photon or neutron polarization observables and for path and interference observables in a photon split-beam experiment. A recent experiment proposed and performed by Mittelstaedt, Prieur, and Schieder in Cologne is interpreted as a partial version of the latter example.

  11. 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...

  12. 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...

  13. TURBO EQUALIZATION WITH JOINTLY GAUSSIAN EQUALIZER

    Institute of Scientific and Technical Information of China (English)

    Jiang Sen; Sun Hong; Li Ping

    2005-01-01

    A Jointly Gaussian (JG) equalizer is derived for turbo equalization based on an augmented real matrix representation of channel model and a Gaussian approximation of the received symbol sequence. Using matrix inversion lemma and Cholesky decomposition, a lowcomplexity implementation of JG equalizer is also presented. The simulation results and complexity comparison confirm that turbo equalization with JG equalizer has a better performance and a lower complexity than the existing turbo equalization with linear minimum mean squared error equalizer.

  14. 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.

  15. 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.

  16. 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...

  17. 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 ...

  18. 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...

  19. 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 ...

  20. 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....

  1. 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

  2. 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

  3. Radiation dose in temporomandibular joint zonography

    Energy Technology Data Exchange (ETDEWEB)

    Coucke, M.E.; Bourgoignie, R.R.; Dermaut, L.R.; Bourgoignie, K.A.; Jacobs, R.J. (Department of Orthodontics, Universitair Ziekenhuis, Ghent (Belgium))

    1991-06-01

    Temporomandibular joint morphology and function can be evaluated by panoramic zonography. Thermoluminescent dosimetry was applied to evaluate the radiation dose to predetermined sites on a phantom eye, thyroid, pituitary, and parotid, and the dose distribution on the skin of the head and neck when the TMJ program of the Zonarc panoramic x-ray unit was used. Findings are discussed with reference to similar radiographic techniques.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. 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)

  9. 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.

  10. Bending Capacity of Middle Joints of Upholstered Furniture Frames

    Directory of Open Access Journals (Sweden)

    Vasiliki Kamperidou, Vasileios Vasileiou

    2012-12-01

    Full Text Available This study evaluates the edgewise bending moment capacity of the four most frequently used middle joints in the upholstered furniture frames. The research included the following joints: Mortise and Tenon, double Dowel, Corner Blocks and double Gusset Plates, designed in the form of middle joints and made of beech and poplar solid wood. The test results indicated that regarding the edgewise bending force, the strongest middle joint was the double dowel joint made of beech wood (1896.9 N, while the respective joint made of poplar marked quite a low value of bending force (937.2 N. The strength of wooden corner blocks was proved to be quite powerful, made either of beech wood, poplar wood or the combination of the two wood species (beech: 1881.8 N, poplar: 1237.6 N, beech-poplar: 1783.6 N. The gusset plate joint made of beech resulted in weaker values (1378.2 N, compared to the dowel and corner block joints made of beech, whereas the same joint made of poplar demonstrated very satisfying values of edgewise bending force (1471.8 N. Finally, the mortise and tenon joint appeared to have the lowest strength, both in the case of beech (1306 N and poplar (634 N. The highest coeffi cient of elasticity (CE derived from double gusset plate joint, made of beech. All the joints showed good elasticity, except the mortise and tenon joint made of poplar, as well as, the dowel joint made of poplar, which recorded the lowest elasticity values of all. Generally, beech wood resulted in stronger and more elastic joints compared to poplar.

  11. 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.

  12. Validity of summing painful joint sites to assess joint-pain comorbidity in hip or knee osteoarthritis

    NARCIS (Netherlands)

    Siemons, Liseth; Klooster, ten Peter M.; Laar, van de Mart A.F.J.; Ende, van den Cornelia H.M.; Hoogeboom, Thomas J.

    2013-01-01

    BACKGROUND: Previous studies in patients with hip and knee osteoarthritis (OA) have advocated the relevance of assessing the number of painful joint sites, other than the primary affected joint, in both research and clinical practice. However, it is unclear whether joint-pain comorbidities can simpl

  13. Control of International Joint-ventures:A Literature Review

    Institute of Scientific and Technical Information of China (English)

    Rong Ding

    2013-01-01

    Joint-venture,which is considered as an important hybrid govern-ance structure between markets and hierarchy,has gained increasing popularity among firms that attempt to improve their competitive advantage through collabo-ration.This paper reviews the theoretical and empirical studies on control of joint-ventures with an emphasis on the specific control mechanisms used in practice to manage joint-ventures.Furthermore,special attention is given to how performance of joint-venture is measured and what determines its performance.This paper con-cludes with some suggestions for future research on control of joint-ventures.

  14. 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.

  15. 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.

  16. 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)

  17. 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

  18. Determination and optimization of joint torques and joint reaction forces in therapeutic exercises with elastic resistance.

    Science.gov (United States)

    Biscarini, Andrea

    2012-01-01

    A model has been developed to definitively characterize the resistance properties and the joint loading (i.e., shear and compressive components of the joint reaction force) in single-joint exercises with ideal elastic bands. The model accounts for the relevant geometric and elastic properties of the band, the band pre-stretching, and the relative positioning among the joint center of rotation and the fixation points of the band. All the possible elastic torque profiles of ascending-descending, descending, or ascending type were disclosed in relation to the different ranges of joint angles. From these results the elastic resistance setting that best reproduces the average-user's knee extensor torque in maximal isometric/isokinetic efforts was determined. In this optimized setting, the shear tibiofemoral reaction force corresponding to an anterior (posterior) tibial displacement was 65% smaller than (nearly the same as) that obtained in a cam-equipped leg-extension equipment for equal values of resistance torque peak, whereas the compressive tibiofemoral reaction force was 22% higher. Compared to a weight-stack leg-extension equipment, an elastic resistance optimized setting has the potential to give a more effective quadriceps activation across the range of motion, and greatly reduces the anterior cruciate ligament strain force, which represents the main drawback of existing open kinetic-chain knee-extension exercises.

  19. Determination and optimization of joint torques and joint reaction forces in therapeutic exercises with elastic resistance.

    Science.gov (United States)

    Biscarini, Andrea

    2012-01-01

    A model has been developed to definitively characterize the resistance properties and the joint loading (i.e., shear and compressive components of the joint reaction force) in single-joint exercises with ideal elastic bands. The model accounts for the relevant geometric and elastic properties of the band, the band pre-stretching, and the relative positioning among the joint center of rotation and the fixation points of the band. All the possible elastic torque profiles of ascending-descending, descending, or ascending type were disclosed in relation to the different ranges of joint angles. From these results the elastic resistance setting that best reproduces the average-user's knee extensor torque in maximal isometric/isokinetic efforts was determined. In this optimized setting, the shear tibiofemoral reaction force corresponding to an anterior (posterior) tibial displacement was 65% smaller than (nearly the same as) that obtained in a cam-equipped leg-extension equipment for equal values of resistance torque peak, whereas the compressive tibiofemoral reaction force was 22% higher. Compared to a weight-stack leg-extension equipment, an elastic resistance optimized setting has the potential to give a more effective quadriceps activation across the range of motion, and greatly reduces the anterior cruciate ligament strain force, which represents the main drawback of existing open kinetic-chain knee-extension exercises. PMID:21757393

  20. 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)

  1. The distal radioulnar joint. Anatomic and functional considerations.

    Science.gov (United States)

    Kauer, J M

    1992-02-01

    The distal radioulnar joint is functionally coupled with the proximal radioulnar joint, thus forming a mechanism for the longitudinal rotation of the hand. Distal radioulnar mobility is derived from the geometry of the joint, joint surfaces, and radioulnar connections. There is a structural and functional separation between the distal radioulnar and carpal joints, giving the possibility of pronation and supination in every position of the hand to the forearm. As for the stability of the joints involved, the ulnar articular disk plays an essential role. Being part of both distal radioulnar and carpal joints, the disk has very specific morphologic features that not only are individualized to the function of both joints but also stabilize the joints in their independent movements. Developmental data give the strong impression of an architectural scheme, of which the distal radioulnar joint is only a part. Traumatic lesions at the distal radioulnar joint and disturbances in normal distal radioulnar alignment have to be viewed, therefore, in a wider context. PMID:1735231

  2. 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

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

    Science.gov (United States)

    Abdullah, A. R.; Afendi, Mohd; Majid, M. S. Abdul

    2013-12-01

    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.

  4. Fatigue assessment of load-carrying welded cruciform joints

    Directory of Open Access Journals (Sweden)

    S.V. Petinov

    2013-04-01

    Full Text Available T-form and cruciform joints in which the stress flow is transferred via weld material are widely applied in welded structures. A special type of these joints is presented by fillet-welded joints with incomplete penetration used by economical and manufacturing reasons. At a certain width of the cavity it becomes an active notch which in current design rules is regarded as an initial crack. In that way, fatigue life of the joint is characterized by the crack extensions towards the outer surface of weld bead. Fatigue assessment of these joints requires reliable data on the stress intensity factors values along the crack path. The results of systematic FEA-based calculations of stress intensity factors and respective S-N curves for the considered welded joints are presented. Main results obtained during this investigation can be used in solution of engineering tasks in reference to the fatigue assessment of welded cruciform joints with incomplete penetration.

  5. Fuzzy Modelling of Knee Joint with Genetic Optimization

    Directory of Open Access Journals (Sweden)

    B. S. K. K. Ibrahim

    2011-01-01

    Full Text Available Modelling of joint properties of lower limbs in people with spinal cord injury is significantly challenging for researchers due to the complexity of the system. The objective of this study is to develop a knee joint model capable of relating electrical parameters to dynamic joint torque as well as knee angle for functional electrical stimulation application. The joint model consists of a segmental dynamic, time-invariant passive properties and uncertain time-variant active properties. The knee joint model structure comprising optimised equations of motion and fuzzy models to represent the passive viscoelasticity and active muscle properties is formulated. The model thus formulated is optimised using genetic optimization, and validated against experimental data. The developed model can be used for simulation of joint movements as well as for control development. The results show that the model developed gives an accurate dynamic characterisation of the knee joint.

  6. 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

  7. 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.

  8. Task representation in individual and joint settings

    Directory of Open Access Journals (Sweden)

    Wolfgang ePrinz

    2015-05-01

    Full Text Available This paper outlines a framework for task representation and discusses applications to interference tasks in individual and joint settings. The framework is derived from the Theory of Event Coding. This theory regards task sets as transient assemblies of event codes in which stimulus and response codes interact and shape each other in particular ways. On the one hand, stimulus and response codes compete with each other within their respective subsets (horizontal interactions. On the other hand, stimulus and response code cooperate with each other (vertical interactions. Code interactions instantiating competition and cooperation apply to two time scales: on-line performance (i.e., doing the task and off-line implementation (i.e., setting the task. Interference arises when stimulus and response codes overlap in features that are irrelevant for stimulus identification, but relevant for response selection. To resolve this dilemma, the feature profiles of event codes may become restructured in various ways. The framework is applied to three kinds of interference paradigms. Special emphasis is given to joint settings where tasks are shared between two participants. Major conclusions derived from these applications include: (1 Response competition is the chief driver of interference. Likewise, different modes of response competition give rise to different patterns of interference. (2 The type of features in which stimulus and response codes overlap is also a crucial factor. Different types of such features give likewise rise to different patterns of interference. (3 Task sets for joint settings conflate intraindividual conflicts between responses (what, with interindividual conflicts between responding agents (whom. Features of response codes may, therefore, not only address responses, but also responding agents (both physically and socially.

  9. Equivalent Continuum Modeling for Shock Wave Propagation in Jointed Media

    Energy Technology Data Exchange (ETDEWEB)

    Vorobiev, O; Antoun, T

    2009-12-11

    This study presents discrete and continuum simulations of shock wave propagating through jointed media. The simulations were performed using the Lagrangian hydrocode GEODYN-L with joints treated explicitly using an advanced contact algorithm. They studied both isotropic and anisotropic joint representations. For an isotropically jointed geologic medium, the results show that the properties of the joints can be combined with the properties of the intact rock to develop an equivalent continuum model suitable for analyzing wave propagation through the jointed medium. For an anisotropically jointed geologic medium, they found it difficult to develop an equivalent continuum (EC) model that matches the response derived from mesoscopic simulation. They also performed simulations of wave propagation through jointed media. Two appraoches are suggested for modeling the rock mass. In one approach, jointed are modeled explicitly in a Lagrangian framework with appropriate contact algorithms used to track motion along the interfaces. In the other approach, the effect of joints is taken into account using a constitutive model derived from mesoscopic simulations.

  10. Effect of Finger Joint on Flexural Strength of Teak Wood

    Directory of Open Access Journals (Sweden)

    Bharatesh A. Danawade

    2014-01-01

    Full Text Available This paper presents the flexural properties of rectangular Burma teak wood beam without finger joint and with finger joint. Finger joints enable full utilization of wood. Finger jointing technique is also used to eliminate wood defects which weaken the strength of wood. This paper considers finger joint as defined defect and its effect on the flexural strength is determined. Teakwood is hard and heavy, seasons rapidly and has good durability. The specimens were studied under three point bending test. Both edge wise and flat wise tests were carried out. It is observed that Burma teakwood beam without finger joint is stronger than beams with finger joints. Because of finger jointing the flexural strength reduces. It can be concluded that the strength loss can improved upon by selecting suitable geometry of finger joint and a suitable adhesive. It is recognized that further studies are necessary on jointing techniques of wood and type of adhesive so as to equal the flexural strength properties of clear teak wood beams.

  11. Influence of Relict Joints on Permeability of Residual Soil

    Science.gov (United States)

    Talib, Z. A.; Kassim, A.; Yunusa, G. H.

    2016-07-01

    Weathering process of granitic material results in the formation of relict joint in lateritic layer of the weathering profile. The number and arrangements of the relict joints affects the permeability of the residual soil which invariably affects water flow and suction distribution in the residual soil. Although the permeability of residual soil without a relict joint can be determined using standard permeability test, it is difficult to be measured when a relict joint is incorporated due to limitation of size and area of the standard equipment. Hence, modified permeability test equipment is introduced in this study. Two arrangement of the relict joint in the equipment were considered. In the first arrangement one relict joint with various spacing were tested while the orientation and spacing of the relict joint were tested using two relict joints in the second arrangement. The results obtained shows that the permeability of the residual soil due to one and two relict joint varies by two orders of magnitude. Therefore, the number and spacing of relict joints modified the permeability of residual soil.

  12. Fatigue Life of High-Strength Steel Offshore Tubular Joints

    DEFF Research Database (Denmark)

    Petersen, Rasmus Ingomar; Agerskov, Henning; Lopez Martinez, Luis

    1996-01-01

    In the present investigation, the fatigue life of tubular joints in offshore steel structures is studied. Two test series on full-scale tubular joints have been carried through. One series was on joints in conventional offshore structural steel, and the other series was on joints in high-strength......In the present investigation, the fatigue life of tubular joints in offshore steel structures is studied. Two test series on full-scale tubular joints have been carried through. One series was on joints in conventional offshore structural steel, and the other series was on joints in high...... from Ø 324-610 mm tubes, and the joints were loaded in in-plane bending. Both fatigue tests under constant amplitude loading and tests with a stochastic loading that is realistic in relation to offshore structures, are included in the investigation.A comparison between constant amplitude and variable...... amplitude fatigue test results showed shorter fatigue lives in variable amplitude loading than should be expected from the linear fatigue damage accumulation formula. Furthermore, the fatigue tests on high-strength steel tubular joints showed slightly longer fatigue lives than those obtained in...

  13. EFFECT OF MANJISTADI LEPA IN TRAUMATIC JOINT DISORDERS

    Directory of Open Access Journals (Sweden)

    Hemantha Kumar P

    2013-06-01

    Full Text Available Among commonly occurring traumatic skeletal disorders, sprains and strains of ankle joint and inter-phalangeal joints are more prone. In all such conditions initial complaint of patients will be pain associated with swelling with or without deformity. These clinical conditions hamper the routine activities and also financial status of the individuals. Acharya Sushruta has advocated the application of Manjistadi lepa in traumatic joint injuries in chikitsa sthana which made me to undertake this work. The management of such traumatic disorders varies in allied sciences so, an attempt is made to assess the efficacy of non-invasive and OPD based management by Manjistadi lepa. Aims and Objectives: To evaluate the efficacy of Manjishtadi Lepa in traumatic joint disorders. Methods: In this observational study 25 patients selected from S D M College of Ayurveda & Hospital. Results: Among 25 patients of traumatized joint disorders, ankle joint was involved in 44 %, knee joint 12 %, interphalangeal 24 %, costochondral joints 12 % and wrist joint 08 % of patients. Conclusion: Manjistadi Lepa was found to be very beneficial in traumatic joint disorders due to strain and sprain was observed.

  14. [Burning mouth syndrome - a joint biopsychosocial approach].

    Science.gov (United States)

    Arpone, Francesca; Combremont, Florian; Weber, Kerstin; Scolozzi, Paolo

    2016-02-10

    Burning mouth syndrome (BMS) is a medical condition that is often refractory to conventional diagnostic and therapeutic methods. Patients suffering from BMS can benefit from a biopsychosocial approach in a joint, medical-psychological consultation model. Such a consultation exists at Geneva University Hospitals, involving the collaboration of the maxillo-facial and oral surgery division and the division of liaison psychiatry and crisis intervention, in order to take into account the multiple factors involved in BMS onset and persistence. This article will describe BMS clinical presentation, and present an integrate approach to treat these patients. PMID:27039444

  15. [Temporo-mandibular joints and orthognathic surgery].

    Science.gov (United States)

    Bouletreau, P

    2016-09-01

    Temporo-Mandibular Joints (TMJ) and orthognathic surgery are closely linked. In the past, some authors have even described (with mixed results) the correction of some dysmorphosis through direct procedures on the TMJs. Nowadays, performing orthognathic surgery involves the TMJ in three different occasions: (1) TMJ disorders potentially responsible for dento-maxillary dysmorphosis, (2) effects of orthognathic surgery on TMJs, and (3) condylar positioning methods in orthognathic surgery. These three chapters are developed in order to focus on the close relationships between TMJ and orthognathic surgery. Some perspectives close this article.

  16. Imaging of bursae around the shoulder joint

    Energy Technology Data Exchange (ETDEWEB)

    Bureau, N.J. [Department of Radiology, Hotel-Dieu de Montreal Hospital, Montreal, Quebec (Canada); Dussault, R.G. [Department of Radiology, Health Sciences Center, University of Virginia, Charlottesville, Virginia (United States); Keats, T.E. [Department of Radiology, Health Sciences Center, University of Virginia, Charlottesville, Virginia (United States)

    1996-08-01

    The authors present a review of the anatomy of the major bursae around the shoulder joint and discuss the use of the different imaging modalities which demonstrate their radiologic features. The calcified subacromial-subdeltoid bursa has a characteristic appearance on plain radiographs. When inflamed it can be visualized by ultrasound and magnetic resonance imaging. Calcific bursitis may involve the subcoracoid bursa. This bursa may mimic adhesive capsulitis of the shoulder or complete rotator cuff tear when injected inadvertently during shoulder arthrography. Less well known are three coracoclavicular ligament bursae. These are also subject to calcific bursitis and have a typical radiologic appearance. (orig.). With 6 figs.

  17. Bus bar joints stability and protection

    CERN Document Server

    Verweij, A

    2009-01-01

    A defective bus connection between two dipole magnets was the primary cause of the incident in sector 34 on September 19th. I will show how this could have happened, i.e. how a highly resistive joint has caused a thermal runaway and burned (or opened) before the QPS threshold was reached. In the second part of the talk I will present the new detection limits for the QPS upgrade of the RB and RQ circuits, required to avoid similar thermal runaways in the future.

  18. Chronic hematic cyst of the temporomandibular joint

    International Nuclear Information System (INIS)

    Hematic cyst refers to accumulation of blood or blood breakdown products in a non epithelium-lined fibrous tissue capsule. Hepatic cyst is a term often used for deeply placed, incompletely resorbed hematoma hemorrhagic cyst, which may remain unchanged and unidentified for long periods of time. Trauma is the major causative factor, although it is often vague or totally uncalled by the patient. Chronic hematic cysts are uncommon lesions those can present diagnostic challenge. In this article we report a first case of a chronic hematic cyst of the temporomandibular joint TMJ. (author)

  19. Soft Tissue Aspects of the Shoulder Joint

    OpenAIRE

    Khoschnau, Shwan

    2012-01-01

    The aim of this thesis was to study different aspects of the soft tissues of the shoulder joint. The variation in the quality of the tendons and ligaments can be explained by genetic factors. To test the hypothesis that collagen 1 α1 Sp1 polymorphism is related to the occurrence of cruciate ligament ruptures and shoulder dislocations, a total of 358 patients (233 patients with cruciate ligament ruptures and 126 with shoulder dislocations) were included in the study. We found a decreased risk ...

  20. Liquid crystals in biotribology synovial joint treatment

    CERN Document Server

    Ermakov, Sergey; Eismont, Oleg; Nikolaev, Vladimir

    2016-01-01

    This book summarizes the theoretical and experimental studies confirming the concept of the liquid-crystalline nature of boundary lubrication in synovial joints. It is shown that cholesteric liquid crystals in the synovial liquid play a significant role in the mechanism of intra-articular friction reduction. The results of structural, rheological and tribological research of the creation of artificial synovial liquids - containing cholesteric liquid crystals in natural synovial liquids - are described. These liquid crystals reproduce the lubrication properties of natural synovia and provide a high chondroprotective efficiency. They were tested in osteoarthritis models and in clinical practice.

  1. Sesamoid disorders of the first metatarsophalangeal joint.

    Science.gov (United States)

    Boike, Allan; Schnirring-Judge, Molly; McMillin, Sean

    2011-04-01

    The sesamoid complex is located centrally and plantar to the first metatarsal head, where they are imbedded within the plantar plate, which transmits 50% of body weight and more than 300% during push-off, is susceptible to numerous pathologies. These pathologies include sesamoiditis, stress fracture, avascular necrosis, osteochondral fractures, and chondromalacia, and are secondary to these large weight-bearing loads. This article discusses sesamoid conditions and their relationship with hallux limitus, and reviews the conditions that predispose the first metatarsophalangeal joint to osteoarthritic changes. PMID:21669339

  2. Caveat emptor: joint ventures with specialty hospitals.

    Science.gov (United States)

    Kahn, Charles N

    2006-06-01

    A specialty hospital joint venture between a health system and physician investors may implicate anti-kickback and tax laws when physicians self-refer patients to the hospital, raising the issue of conflict of interest. Physician self-referral can motivate behavior, such as cherry-picking patients and increased utilization, which in turn leads to windfall profits for physician owners and weakens classic community hospitals. Hopitals can best serve the interests of patients and improve performance by building enduring partnerships with physicians.

  3. Interposition arthroplasty in temporomandibular joint ankylosis

    OpenAIRE

    Ahmad, Q. G.; Siddiqui, R A; Khan, A H; S C Sharma

    2004-01-01

    We report a series of 60 cases of post- traumatic temporomandibular joint ankylosis that were treated at our unit from 1992 to 2002 by temporalis fascia flap interposition arthopiasty. Majority of these patients (21 patients, 35%) were in the age group of 15–20 years, with 39 males (65%) and 21 females (35%). The duration of ankylosis varied from 6 months to more than 4 years with 32 patients (54.32%) having a duration of 6 months to 2 years. 44 patients (73.33%) had unilateral white 16 patie...

  4. Isolated Dislocation of Proximal Tibiofibular Joint

    OpenAIRE

    Oktay, Alper; Baysal, Ozgur; Ecevız, Engin; Elmalı, Nurzat

    2014-01-01

    Objectives: Proximal tibiofibular joint luxation is very rare condition and usually missed in the ED. The aim of the study is if a patient is brought to ED with knee injury, we should keep in mind this pathology. Methods: A 23 year old man was admitted to emergency department with knee pain and restricted movement of the knee during the football match. Physical examination revealed mild swelling and limited ROM on his knee. We took AP and lateral X-rays immediately. We diagnosed the proximal ...

  5. JET joint undertaking. Annual report 1978

    International Nuclear Information System (INIS)

    This document is intended for information only and should not be used as a technical reference. After an introductive part on the controlled nuclear fusion research and an historical survey of the JET project, are presented: the JET joint undertaking (members of council and committee...) with its administration (finance, personnel, external relations), and the scientific and technical department with its divisions for systems (experimental, magnet, plasma, assembly, power supplies, control and data acquisition, and site and building). In appendix is described the Euratom fusion research programme

  6. [Surgical treatment of temporomandibular joint ankylosis].

    Science.gov (United States)

    Worsaae, N; Hjørting-Hansen, E; Jensen, B; Seidler, B; Praetorius, F

    1992-09-14

    Surgical treatment of temporo-mandibular joint (TMJ) ankylosis may be a particularly difficult procedure due to unfavourable anatomic configurations and the proximity of vital structures. Postoperatively, it is followed by an often long and painful period of physiotherapy. The results of treatment of eight patients with TMJ ankylosis are reported. Different methods were used according to age of the patient and the extent of the ankylotic changes. The importance of early treatment is emphasized. This results in less extensive surgery and reduces secondary growth anomalies of the jaws.

  7. FATIGUE DEVICE FOR TESTING ANKLE JOINT ENDOPROSTHESES

    Directory of Open Access Journals (Sweden)

    Cristian TOADER-PASTI

    2012-05-01

    Full Text Available The paper proposes a model of a fatigue device for testing dedicated to ankle prostheses. The concept of the testing device relies on two aspects: almost any type of ankle prosthesis can be tested on it and it has to work on INSTRON axial-torsion testing machine. Starting from these requirements, a 3D functional assembly that reproduces the real movement of the ankle joint during gait cycle has been designed. The device is based on a cam-follower mechanism.

  8. Prosthesis infections after orthopedic joint replacement

    DEFF Research Database (Denmark)

    Song, Zhijun; Borgwardt, Lotte; Høiby, Niels;

    2013-01-01

    Prosthesis-related infection is a serious complication for patients after orthopedic joint replacement, which is currently difficult to treat with antibiotic therapy. Consequently, in most cases, removal of the infected prosthesis is the only solution to cure the infection. It is, therefore......, important to understand the comprehensive interaction between the microbiological situation and the host immune responses that lead to prosthesis infections. Evidence indicates that prosthesis infections are actually biofilm-correlated infections that are highly resistant to antibiotic treatment...... microbiological and surgical measures. Recent progress in research into bacterial biofilm and possible future treatment options of prosthesis-related infections are discussed....

  9. Kinematic and dynamic analysis of an anatomically based knee joint.

    Science.gov (United States)

    Lee, Kok-Meng; Guo, Jiajie

    2010-05-01

    This paper presents a knee-joint model to provide a better understanding on the interaction between natural joints and artificial mechanisms for design and control of rehabilitation exoskeletons. The anatomically based knee model relaxes several commonly made assumptions that approximate a human knee as engineering pin-joint in exoskeleton design. Based on published MRI data, we formulate the kinematics of a knee-joint and compare three mathematical approximations; one model bases on two sequential circles rolling a flat plane; and the other two are mathematically differentiable ellipses-based models with and without sliding at the contact. The ellipses-based model taking sliding contact into accounts shows that the rolling-sliding ratio of a knee-joint is not a constant but has an average value consistent with published measurements. This knee-joint kinematics leads to a physically more accurate contact-point trajectory than methods based on multiple circles or lines, and provides a basis to derive a knee-joint kinetic model upon which the effects of a planar exoskeleton mechanism on the internal joint forces and torque during flexion can be numerically investigated. Two different knee-joint kinetic models (pin-joint approximation and anatomically based model) are compared against a condition with no exoskeleton. The leg and exoskeleton form a closed kinematic chain that has a significant effect on the joint forces in the knee. Human knee is more tolerant than pin-joint in negotiating around a singularity but its internal forces increase with the exoskeleton mass-to-length ratio. An oversimplifying pin-joint approximation cannot capture the finite change in the knee forces due to the singularity effect.

  10. Lower limb joint kinetics and ankle joint stiffness in the sprint start push-off.

    Science.gov (United States)

    Charalambous, Laura; Irwin, Gareth; Bezodis, Ian N; Kerwin, David

    2012-01-01

    Sprint push-off technique is fundamental to sprint performance and joint stiffness has been identified as a performance-related variable during dynamic movements. However, joint stiffness for the push-off and its relationship with performance (times and velocities) has not been reported. The aim of this study was to quantify and explain lower limb net joint moments and mechanical powers, and ankle stiffness during the first stance phase of the push-off. One elite sprinter performed 10 maximal sprint starts. An automatic motion analysis system (CODA, 200 Hz) with synchronized force plates (Kistler, 1000 Hz) collected kinematic profiles at the hip, knee, and ankle and ground reaction forces, providing input for inverse dynamics analyses. The lower-limb joints predominately extended and revealed a proximal-to-distal sequential pattern of maximal extensor angular velocity and positive power production. Pearson correlations revealed relationships (P < 0.05) between ankle stiffness (5.93 ± 0.75 N x m x deg(-1)) and selected performance variables. Relationships between negative power phase ankle stiffness and horizontal (r = -0.79) and vertical (r = 0.74) centre of mass velocities were opposite in direction to the positive power phase ankle stiffness (horizontal: r = 0.85; vertical: r = -0.54). Thus ankle stiffness may affect the goals of the sprint push-off in different ways, depending on the phase of stance considered.

  11. Synovial chondromatosis of the temporomandibular joint.

    Science.gov (United States)

    Reyes Macías, Juan Francisco; Sánchez Prieto, Martín

    2007-01-01

    Synovial Chondromatosis (SC) is a disease whose etiology is unknown, can be defined as a benign synovial process characterized by the formation of metaplastic cartilaginous nodes inside connective tissue of articular surfaces, is considered an active metaplastic phenomenon better than a neoplastic process; it presents a greater preference to affect women who constitute almost 70% of reported cases, the age range is wide and oscillates between 18-75 years (average 44.6 years). Between the main clinical findings are: pain, crackle, volume augmentation and a limited buccal opening. SC is an unusual state and the reports in the English literature are no more than 75 cases, only 66 of those where histologically verified, most of those were affecting great joints like hip, knee and shoulder, but if SC is not frequent in this sites, is even more infrequent on temporomandibular joint. The aim of this paper is to report a clinical case and at the same time to realize a brief review of the literature.

  12. COMPLEX FUNCTIONAL ASSESSMENT OF THE HIP JOINT.

    Directory of Open Access Journals (Sweden)

    Maya S. Krastanova

    2015-09-01

    Full Text Available Introduction: In relation to the study reporting the effects of applying phased complex rehabilitation in patients with total hip arthroplasty, it has been concluded that the everyday clinical practice in Bulgaria does not apply complex examination, giving an objective picture about the extent of functional status of patients with trauma and diseases of the hip. Aim: The main goal of this report is to present a test which incorporates all known and routine research and in which the total number of points determines the functional status of patients with trauma and diseases of the hip. Material and Methods: Based on the Hip dysfunction and Osteoarthritis Outcome Score, the Harris Hip Score modified test, scale D’Aubigne and Postel and Iowa’s test for complex functional evaluation of the hip joint, we have developed a test including information about the degree of pain; goniometry and manual muscle testing of the hip; locomotor test – type of gait and adjuvants; test for Daily Activities of Life. The test has been developed on the basis of expert assessment by doctors and physiotherapists of the proposed indicators for evaluation and determination of the weighting factors’ contribution to the general condition of the patient. Conclusion: The developed and tested method of complex functional assessment of the hip joint enables our colleagues, dealing with trauma and diseases of the hip, to use it in various research and scientific projects, as well as in general medical practice.

  13. Joint action without and beyond planning

    DEFF Research Database (Denmark)

    Blomberg, Olle

    2013-01-01

    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...... on the second. In chapter 2, I focus on why participants must have mutual or common knowledge of each other’s intentions and beliefs in order to have a shared intention: Why must these attitudes be “out in the open”? I argue that, if participants lack the concept of belief, then one of the two main motivations...... argue that ‘shared intention’-accounts are unable to say much about spontaneous or skilful joint action because of the following widely accepted constraint on what one can intend: while an agent might intend—in the sense of commit to a plan—that “we” do something together, an agent cannot intend...

  14. Anatomic Reconstruction of the Proximal Tibiofibular Joint.

    Science.gov (United States)

    Warner, Brent T; Moulton, Samuel G; Cram, Tyler R; LaPrade, Robert F

    2016-02-01

    Proximal tibiofibular joint (PTFJ) instability can be easily missed or confused for other, more common lateral knee pathologies such as meniscal tears, fibular collateral ligament injury, biceps femoris pathology, or iliotibial band syndrome. Because of this confusion, some authors believe that PTFJ instability is more common than initially appreciated. Patients with PTFJ subluxation may have no history of inciting trauma or injury, and it is not uncommon for these patients to have bilateral symptoms and generalized ligamentous laxity. Currently, the optimal surgical treatment for patients with chronic PTFJ instability is unknown. Historically, a variety of surgical treatments have been reported. Initially, joint arthrodesis and fibular head resection were recommended. More recently, temporary screw fixation, nonanatomic reconstruction with strips of the biceps femoris tendon or iliotibial band, and reconstruction with free hamstring autograft have been described. The purpose of this report is to present our surgical technique for treatment of chronic PTFJ instability using an anatomic reconstruction of the posterior ligamentous structures of the PTFJ with a semitendinosus autograft. PMID:27274455

  15. Market for ethanol feed joint products

    Energy Technology Data Exchange (ETDEWEB)

    Hertzmark, D.; Gould, B.

    1979-10-01

    This report presents results of econometric estimations and mathematical simulations of markets for joint feed products of motor ethanol. The major issues considered are the nature of current market price relationships, effects on prices, including feed substitutes prices, and effects of demands for increased use of distillers' grains and gluten meal. The econometric section shows that soybean meal was by far the dominant force in the pricing of the two products. However, neither one could be adequately explained without the inclusion of corn in the estimating equations. Later research shows that this was due to the importance of both feeds for metabolizable energy as well as for protein in livestock diets. Current ration formulations would require some discounting of the value of the protein content of the two feeds. Careful siting of the ethanol facilities, and flexible design of the plants so that a maximum number of products may be extracted from the feedstock, seem necessary. Finally, the analysis indicates that substitution in animal diets of these joint products for the corn or milo used originally requires that additional energy be supplied to the animal by some type of forage crop. This implies that additional land may be required for energy production, for such marginal crops as hay and alfalfa, rather than for row crops.

  16. Joint US-CERN-Russia-Japan School

    CERN Multimedia

    CAS

    2011-01-01

    The Joint US-CERN-Russia-Japan School recently organised a course on Synchrotron Radiation & Free Electron Lasers, held at the Ettore Majorana Foundation and Centre for Scientific Culture in Erice, Italy from 6 to 15 April, 2011.   The school attracted 65 participants representing 22 different nationalities, with around half from Europe and the other half from Russia, Asia and the Americas. The programme comprised 15 lectures each of 90 minutes, 9 hours of parallel sessions, and 6 hours of discussion/student presentation sessions. 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. In addition to the academic programme, the students had the opportunity during the traditional one-day excursion to visit two archeological sites at the Temples of Segesta and Selinunte. The success of the school has encouraged the organisers to re-launch the Joint School, which ran on a roughly t...

  17. Transfer and Joint Programs - do they Work?

    Science.gov (United States)

    Chapman, P.; Chang, P.; Wu, D.

    2013-12-01

    With the increased interest in internationalization, many western universities have been working to attract students from China and other Asian countries. Texas A&M University has had a collaborative Ph.D. program with Ocean University, Qingdao, China since 2008. Chinese students spend their first one or two years in Qingdao, then transfer to TAMU to complete their coursework and carry out research. The program has so far produced 6 PhDs and one MS degree, and another 14 students are registered through the program. We anticipate sending U.S. students to China on a reciprocal basis, although the lack of Chinese-speaking U.S. students is an issue. Additionally, the Memorandum of Understanding has led to joint research projects between the two universities, with publications in top journals. Novel aspects of the program include joint funding by the U.S. and China, co-chairing graduate committees by both university faculties, interviewing students in Qingdao before they are accepted by TAMU, and initial studies in one country and then transfer to the other. Such programs require 'heroes' on each side to set up and continue the program who trust each other, as well as support from the upper administration. Even with such support, outside influences and different cultures can affect the effectiveness of the program.

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

    Directory of Open Access Journals (Sweden)

    E. Cipriano

    2015-09-01

    Full Text Available 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 count of 28 swollen and tender joints. Our study is, therefore, aimed to assess joint involvement in a SLE cohort using the STR. SLE patients with joint symptoms (≥1 tender joint were enrolled over a period of one month. Disease activity was assessed by SLEDAI-2K. We performed the swollen and tender joint count (0-28 and calculated the STR. Depending on the STR, SLE patients were grouped into three categories of disease activity: low (STR1.0. We also calculated the disease activity score based on a 28-joint count and the erythrocyte sedimentation rate (DAS28-ESR. We enrolled 100 SLE patients [F/M 95/5, mean±standard deviation (SD age 46.3±10.6 years, mean±SD disease duration 147.1±103.8 months]. The median of tender and swollen joints was 4 (IQR 7 and 1 (IQR 2.5, respectively. The median STR value was 0.03 (IQR 0.6. According to the STR, disease activity was low in 70 patients, moderate in 23 and high in 7. A significant correlation was identified between STR values and DAS28 (r=0.33, p=0.001. The present study suggests a correlation between STR and DAS28, allowing an easier and faster assessment of joint involvement with the former index.

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

    Science.gov (United States)

    Cipriano, E; Ceccarelli, F; Massaro, L; Spinelli, F R; Alessandri, C; Perricone, C; Valesini, G; 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 count of 28 swollen and tender joints. Our study is, therefore, aimed to assess joint involvement in a SLE cohort using the STR. SLE patients with joint symptoms (≥1 tender joint) were enrolled over a period of one month. Disease activity was assessed by SLEDAI-2K. We performed the swollen and tender joint count (0-28) and calculated the STR. Depending on the STR, SLE patients were grouped into three categories of disease activity: low (STR1.0). We also calculated the disease activity score based on a 28-joint count and the erythrocyte sedimentation rate (DAS28-ESR). We enrolled 100 SLE patients [F/M 95/5, mean±standard deviation (SD) age 46.3±10.6 years, mean±SD disease duration 147.1±103.8 months]. The median of tender and swollen joints was 4 (IQR 7) and 1 (IQR 2.5), respectively. The median STR value was 0.03 (IQR 0.6). According to the STR, disease activity was low in 70 patients, moderate in 23 and high in 7. A significant correlation was identified between STR values and DAS28 (r=0.33, p=0.001). The present study suggests a correlation between STR and DAS28, allowing an easier and faster assessment of joint involvement with the former index. PMID:26492964

  20. RILEM International Symposium on Materials and Joints in Timber Structures

    CERN Document Server

    Reinhardt, H-W; Garrecht, Harald

    2014-01-01

    This book contains the contributions from the RILEM International Symposium on Materials and Joints in Timber Structures that was held in Stuttgart, Germany from October 8 to 10, 2013. It covers recent developments in the materials and the joints used in modern timber structures. Regarding basic wooden materials, the contributions highlight the widened spectrum of products comprising cross-laminated timber, glulam and LVL from hardwoods and block glued elements. Timber concrete compounds, cement bonded wood composites and innovative light-weight constructions represent increasingly employed alternatives for floors, bridges and facades. With regard to jointing technologies, considerable advances in both mechanical connections and glued joints are presented. Self-tapping screws have created unprecedented options for reliable, strong as well as ductile joints and reinforcement technologies. Regarding adhesives, which constitute the basis of the jointing/laminating technology of modern timber products, extended o...