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Sample records for anomalous superficial peroneal

  1. Stimulus point distribution in deep or superficial peroneal nerve for treatment of ankle spasticity.

    Science.gov (United States)

    Kubota, Shinji; Tanabe, Shigeo; Sugawara, Kenichi; Muraoka, Yoshihiro; Itoh, Norihide; Kanada, Yoshikiyo

    2013-01-01

     To develop effective electrical stimulation treatment to reduce spasticity, we examined the optimal stimulus point of the common peroneal nerve.  The locations of selective stimulus points for the deep peroneal nerve or superficial peroneal nerve fiber were examined in 25 healthy subjects in both legs (50 legs) using the ratio of the tibialis anterior (TA) to the peroneus longus (PL) M-wave amplitude (TA/PL ratio). In addition, we measured reciprocal Ia inhibition in ten healthy subjects. The amount of inhibition was determined from short-latency suppression of the soleus (Sol) H-reflex by conditioning stimuli to the deep or superficial peroneal nerve. The paired t-test was used for statistical analysis.  The mean TA/PL ratio during deep peroneal nerve stimulation was significantly different from superficial peroneal nerve stimulation (p < 0.001). The mean stimulus point for the deep peroneal nerve was located 7 ± 5 mm distal and 3 ± 6 mm anterior from the distal edges of the head of fibula and was markedly different from the stimulus point for the superficial peroneal nerve (20 ± 7 mm distal and 12 ± 8 mm posterior). During deep peroneal nerve stimulation, the mean conditioned H-reflex was depressed to 83.8 ± 10.7% of the unconditioned value of the H-reflex. In contrast, during superficial peroneal nerve stimulation, the mean conditioned H-reflex increased to 105.3 ± 5.2%. These values were significantly different (p < 0.001).  In the present study, we revealed a stimulus area of the deep peroneal nerve. Also, we observed the inhibitory effects of stimulation upon the deep peroneal nerve at individual stimulus point. Our results appear to indicate that localized stimulation of the deep peroneal nerve is more useful for the reduction of ankle spasticity. © 2012 International Neuromodulation Society.

  2. Transient superficial peroneal nerve palsy after anterior cruciate ligament reconstruction

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    Majed Alrowaili

    2016-06-01

    Full Text Available A 19-year-old male subject was diagnosed with medial meniscal, lateral meniscal and anterior cruciate ligament (ACL tear. The symptoms did not subside after 4 months of physical therapy, and he underwent arthroscopic partial medial and lateral meniscectomy and ACL reconstruction. Immediately after the patient woke up from general anesthesia, he started experience loss of sensation in the area of superficial peroneal nerve with inverted dorsiflexion of foot and ankle. Instantly, the bandage and knee brace was removed and a diagnosis of compartment syndrome was ruled out. After eight hours, post-operatively, the patient started receiving physiotherapy. He complained of numbness and tingling in the same area. After 24 h, post-operatively, the patient started to regain dorsiflexion and eversion gradually. Two days after the surgery, the patient exhibited complete recovery of neurological status.

  3. Use of superficial peroneal nerve graft for treating peripheral nerve injuries

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    Samuel Ribak

    2016-02-01

    Full Text Available ABSTRACT OBJECTIVE: To evaluate the clinical results from treating chronic peripheral nerve injuries using the superficial peroneal nerve as a graft donor source. METHODS: This was a study on eleven patients with peripheral nerve injuries in the upper limbs that were treated with grafts from the sensitive branch of the superficial peroneal nerve. The mean time interval between the dates of the injury and surgery was 93 days. The ulnar nerve was injured in eight cases and the median nerve in six. There were three cases of injury to both nerves. In the surgery, a longitudinal incision was made on the anterolateral face of the ankle, thus viewing the superficial peroneal nerve, which was located anteriorly to the extensor digitorum longus muscle. Proximally, the deep fascia between the extensor digitorum longus and the peroneal longus muscles was dissected. Next, the motor branch of the short peroneal muscle (one of the branches of the superficial peroneal nerve was identified. The proximal limit of the sensitive branch was found at this point. RESULTS: The average space between the nerve stumps was 3.8 cm. The average length of the grafts was 16.44 cm. The number of segments used was two to four cables. In evaluating the recovery of sensitivity, 27.2% evolved to S2+, 54.5% to S3 and 18.1% to S3+. Regarding motor recovery, 72.7% presented grade 4 and 27.2% grade 3. There was no motor deficit in the donor area. A sensitive deficit in the lateral dorsal region of the ankle and the dorsal region of the foot was observed. None of the patients presented complaints in relation to walking. CONCLUSIONS: Use of the superficial peroneal nerve as a graft source for treating peripheral nerve injuries is safe and provides good clinical results similar to those from other nerve graft sources.

  4. Entrapment of the Superficial Peroneal Nerve Following a Distal Fibula Fracture.

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    Corey, Robert M; Salazar, Dane H

    2017-02-01

    Although peripheral nerve injury may result from fractures involving the long bones, bony entrapment of peripheral nerves is infrequently encountered. This report demonstrates a rare case of superficial peroneal nerve entrapment between 2 fracture ends of the distal fibula following a closed ankle fracture resulting from a supination-external rotation mechanism. Therapeutic, Level IV: Case report.

  5. Anomalous common peroneal nerve supplying the gluteus maximus ...

    African Journals Online (AJOL)

    On dissection of a 60-year-old adult male cadaver, a high division of the sciatic nerve was observed on the right side along with an accessory slip of the piriformis. In this case, the common peroneal nerve pierced through and the tibial nerve passed below the accessory slip of the piriformis. Additionally, there was an ...

  6. Superficial peroneal nerve paresis in a dancer caused by a midfoot ganglion: case report.

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    Martin, Darrell; Dowling, Jamie; Rowan, Fiachra; Casey, Mary; O'Grady, Paul

    2015-06-01

    Ganglion cysts are common benign masses, usually occurring in the hands and feet. This report describes the case of a young female Irish dancer who presented with paresthesia of her foot due to a ganglion in near proximity to the superficial peroneal nerve. Midfoot ganglia in young girls engaged in Irish dance can limit their ability to participate. This pathology requires further epidemiological studies to investigate its prevalence. In the event of failed conservative management, surgical intervention to excise the cyst and decompress the nerve is an effective treatment to facilitate return to dancing.

  7. Tension neuropathy of the superficial peroneal nerve: associated conditions and results of release.

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    Johnston, E C; Howell, S J

    1999-09-01

    We reviewed eight patients who sustained superficial peroneal nerve neuralgia after an inversion ankle sprain. Surgical exploration found anatomic abnormalities that tethered the nerve from movement during plantarflexion and inversion of the ankle. Most patients' pain improved dramatically after release and anterior transposition of the nerve. Seven joints also underwent arthroscopy, which showed intra-articular disease that was consistent with the original trauma. Five patients had reflex sympathetic dystrophy, three of which resolved after nerve release. Nerve conduction studies were not helpful. Careful physical examination and local nerve blocks were most important in making the diagnosis and prescribing treatment. All conservative measures should be exhausted before surgery is considered.

  8. The course of the superficial peroneal nerve in relation to the ankle position: anatomical study with ankle arthroscopic implications

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    de Leeuw, Peter A. J.; Golanó, Pau; Sierevelt, Inger N.; van Dijk, C. Niek

    2010-01-01

    Despite the fact that the superficial peroneal nerve is the only nerve in the human body that can be made visible; iatrogenic damage to this nerve is the most frequently reported complication in anterior ankle arthroscopy. One of the methods to visualize the nerve is combined ankle plantar flexion

  9. Damage to the superficial peroneal nerve in operative treatment of fibula fractures: straight to the bone? Case report and review of the literature.

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    Halm, Jens A; Schepers, Tim

    2012-01-01

    Ankle fractures are a significant part of the lower extremity trauma seen in the emergency department. Neurologic complications of ankle fracture surgery are infrequently described but account for significant morbidity. The risk of nerve injury is increased for the Blair and Botte type B pattern of the intermediate cutaneous dorsal nerve branch, crossing the distal fibula from posterior to anterior (at 5 to 7 cm from malleolar tip). This pattern is present in about 10% to 15% of patients. Injuries to the superficial peroneal nerve and its branches negatively influence the outcome. Early recognition and protection might reduce the incidence of superficial peroneal nerve injuries during open reduction and internal fixation of lateral malleolus fractures. We describe 2 surgically treated ankle fractures with superficial peroneal nerve branch (intermediate cutaneous dorsal nerve) involvement and review the current literature. Copyright © 2012 American College of Foot and Ankle Surgeons. Published by Elsevier Inc. All rights reserved.

  10. Peroneal Tendinosis

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    ... outside of the ankle. There is pain on exam to palpation right on the peroneal tendons. I t is important to distinguish this from pain over the fibula, which might indicate a different problem (i.e. stress reaction of the bone). Pain on the fibula ...

  11. Borges' perspective on Peronism

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    Joaquín Márquez

    2017-03-01

    Full Text Available From the hypothesis of Ricardo Piglia that incites to read the work of Borges as a dialogue with the two traditions since the nineteenth century have defined the Argentinian culture, this paper aims to analyze the perspective of Borges about Peronism. In his classic stories related to specific historical events of Peronism (“La fiesta del monstruo” y “El simulacro” the two main ideas that liberal intellectuals had on this political movement appear: the first idea holds Peronism is unreal; the second one sees the Peronism as the incarnation of barbarism. However, the reading of some Borges texts reveals unexpected aspects which enable to problematize this interpretation of Peronism.

  12. Peroneal Tendon Injuries

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    ... of peroneal tendon injuries are tendonitis, tears and subluxation. Tendonitis is an inflammation of one or both ... An increase in the height of the arch Subluxation means one or both tendons have slipped out ...

  13. Tuberculous Peroneal Tenosynovitis

    OpenAIRE

    Yu Chung Wong; Tun Hing Lui

    2016-01-01

    Musculoskeletal tuberculosis accounts for 1–5% of all cases of tuberculosis. Tuberculous tenosynovitis is an uncommon form of musculoskeletal tuberculosis occurring primarily in the hands and wrists and is rarely reported in the tendons of the feet. A case of tuberculous peroneal tenosynovitis is reported. Although tuberculosis is an uncommon cause of tenosynovitis, particularly in the foot, it should be included in the differential diagnosis of patients suffering from persistent swelling and...

  14. Tuberculous Peroneal Tenosynovitis

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    Yu Chung Wong

    2016-06-01

    Full Text Available Musculoskeletal tuberculosis accounts for 1–5% of all cases of tuberculosis. Tuberculous tenosynovitis is an uncommon form of musculoskeletal tuberculosis occurring primarily in the hands and wrists and is rarely reported in the tendons of the feet. A case of tuberculous peroneal tenosynovitis is reported. Although tuberculosis is an uncommon cause of tenosynovitis, particularly in the foot, it should be included in the differential diagnosis of patients suffering from persistent swelling and pain in the hind foot, especially in countries where tuberculosis is prevalent.

  15. Bilateral peroneal palsy after weightlifting.

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    Kyavar, Leila; Heckmann, Josef G

    2013-09-01

    In a 48-year-old otherwise healthy man, a bilateral common peroneal palsy was diagnosed clinically and neurophysiologically. He reported on strength training with weights in both arms, lifting the weights and his upper body from a deep squatting position with broadly positioned legs akimbo in a hitherto unusual intensity. Regarding the pathophysiological mechanisms, 2 options are considered: first, stretching of the nerve at the fascia of the peroneal longus muscle and along the fibula neck, and second, compression of the nerve during squatting with weights loaded and with strongly activated anterior tibial and peroneal muscles.

  16. Magnetic resonance imaging findings in patients with peroneal tendinopathy and peroneal tenosynovitis

    International Nuclear Information System (INIS)

    Kijowski, Richard; Smet, Arthur de; Mukharjee, Rajat

    2007-01-01

    To compare the magnetic resonance (MR) imaging findings of a group of patients with clinically diagnosed peroneal tendonopathy and peroneal tenosynovitis with the MR imaging findings of a control group of patients with no clinical evidence of peroneal tendon disorder. The MR examinations of 24 patients with symptomatic peroneal tendinopathy or peroneal tenosynovitis and 70 patients with no clinical evidence of peroneal tendon disorder were retrospectively reviewed to determine the presence or absence of four MR imaging findings: 1) predominantly or uniform intermediate signal intensity within the peroneal tendons on one or more axial proton density-weighted images, 2) predominantly or uniform intermediate signal intensity within the peroneal tendons on three consecutive axial proton density-weighted images, 3) intermediate T2 signal intensity within the peroneal tendons, and 4) circumferential fluid within the common peroneal tendon sheath greater than 3 mm in maximal width. The sensitivity and specificity of these MR imaging findings for determining the presence or absence or symptomatic peroneal tendinopathy or peroneal tenosynovitis were calculated. The sensitivity of MR imaging findings 1, 2, 3, and 4 for determining the presence of peroneal tendinopathy or peroneal tenosynovitis were 92%, 92%, 50%, and 17% respectively. The specificity of MR imaging findings 1, 2, 3, and 4 for determining the absence of peroneal tendinopathy or peroneal tenosynovitis were 57%, 79%, 93%, and 100% respectively. The presence of predominantly or uniform intermediate signal intensity within the peroneal tendons on three consecutive axial proton density-weighted images is a highly sensitive and moderately specific indicator of symptomatic peroneal tendinopathy. The presence of intermediate T2 signal within the peroneal tendons, and the presence of circumferential fluid within the peroneal tendon sheath greater than 3 mm in maximal width, are highly specific indicators of peroneal

  17. Magnetic resonance imaging findings in patients with peroneal tendinopathy and peroneal tenosynovitis

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    Kijowski, Richard; Smet, Arthur de [University of Wisconsin Hospital, Department of Radiology, Madison, WI (United States); Mukharjee, Rajat [University of Wisconsin Hospital, Department of Radiology, Madison, WI (United States); University of Wisconsin Hospital, Department of Statistics, Madison, WI (United States)

    2007-02-15

    To compare the magnetic resonance (MR) imaging findings of a group of patients with clinically diagnosed peroneal tendonopathy and peroneal tenosynovitis with the MR imaging findings of a control group of patients with no clinical evidence of peroneal tendon disorder. The MR examinations of 24 patients with symptomatic peroneal tendinopathy or peroneal tenosynovitis and 70 patients with no clinical evidence of peroneal tendon disorder were retrospectively reviewed to determine the presence or absence of four MR imaging findings: 1) predominantly or uniform intermediate signal intensity within the peroneal tendons on one or more axial proton density-weighted images, 2) predominantly or uniform intermediate signal intensity within the peroneal tendons on three consecutive axial proton density-weighted images, 3) intermediate T2 signal intensity within the peroneal tendons, and 4) circumferential fluid within the common peroneal tendon sheath greater than 3 mm in maximal width. The sensitivity and specificity of these MR imaging findings for determining the presence or absence or symptomatic peroneal tendinopathy or peroneal tenosynovitis were calculated. The sensitivity of MR imaging findings 1, 2, 3, and 4 for determining the presence of peroneal tendinopathy or peroneal tenosynovitis were 92%, 92%, 50%, and 17% respectively. The specificity of MR imaging findings 1, 2, 3, and 4 for determining the absence of peroneal tendinopathy or peroneal tenosynovitis were 57%, 79%, 93%, and 100% respectively. The presence of predominantly or uniform intermediate signal intensity within the peroneal tendons on three consecutive axial proton density-weighted images is a highly sensitive and moderately specific indicator of symptomatic peroneal tendinopathy. The presence of intermediate T2 signal within the peroneal tendons, and the presence of circumferential fluid within the peroneal tendon sheath greater than 3 mm in maximal width, are highly specific indicators of peroneal

  18. Endoscopic Treatment of Intrasheath Peroneal Tendon Subluxation

    OpenAIRE

    Michels, Frederick; Jambou, St?phane; Guillo, St?phane; Van Der Bauwhede, Jan

    2012-01-01

    Intrasheath subluxation of the peroneal tendons within the peroneal groove is an uncommon problem. Open exploration combined with a peroneal groove-deepening procedure and retinacular reefing is the recommended treatment. This extensive lateral approach needs incision of the intact superior peroneal retinaculum and repair afterwards. We treated three patients with a painful intrasheath subluxation using an endoscopic approach. During this tendoscopy both tendons were inspected. The distal mus...

  19. Traumatic pathologies of the calcaneal peroneal tubercle.

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    Heller, Eyal; Robinson, Dror

    2010-01-01

    The peroneal tubercle occurs in about one half of human feet. It size varies from a small nodule of less than 1mm height to a prominent spur up to 1cm in size. It had been noted to cause stenosing tenosynovitis of the peroneal tendons, especially in association with an accessory peroneal bone. The current manuscript describes two cases of symptomatic tenosynovitis developing after an ankle sprain with fracture of the peroneal tubercle. The tenosynovitis caused dysfunction of the peroneal tendons unresponsive to prolonged conservative therapy. Symptoms were resolved following surgical resection. Copyright 2010 Elsevier Ltd. All rights reserved.

  20. Magnetic Resonance Imaging Analysis of Peroneal Tendon Pathology Associated With Low-Lying Peroneus Brevis Muscle Belly: A Case-Control Study.

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    Highlander, Peter; Pearson, Kyle T; Burns, Patrick

    2015-10-01

    Low-lying peroneus brevis tendon muscle belly has been speculated to be an associated factor with symptomatic peroneal tendon pathology. Multiple studies have analyzed normal and anomalous anatomy associated with peroneal tendon pathology; however, no study has confirmed the clinical association between peroneal tendon pathology and low-lying peroneus brevis muscle belly. To identify the correlation of low-lying peroneus brevis muscle belly with peroneal tendon pathology. Case-control study; Level of evidence 3. The level of peroneus brevis muscle belly was compared between patients with symptomatic peroneal tendon pathology (experimental group) and asymptomatic individuals with otherwise normal lateral ankle using magnetic resonance images. Of the 32 consecutive patients with symptomatic peroneal tendon pathology, 28 (87.5%) demonstrated peroneus brevis muscle distal to the fibular groove while 53.8% of control patients demonstrated such findings (P = .022). The most common diagnosis associated with peroneal tendon pathology was ankle instability and osteochondral defect of the talus or tibial plafond. Peroneal tendon pathology in isolation was less common. Peroneal tendon pathology is often associated with lateral ankle instability and osteochondral defects of the ankle joint. Low-lying peroneus brevis muscle belly may be a common anatomic variant, but in the setting of instability it can become a source of pain and pathology secondary to overcrowding. Diagnostic, level III: Case-control study. © 2015 The Author(s).

  1. Peroneal artery-vein index as a potential factor of thrombosis occurrence in free osteocutaneous fibula flap.

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    Dziemianczyk-Pakiela, Dorota; Groth, Dawid; Toloczko-Iwaniuk, Natalia; Rybak, Jozef S; Piotrowski, Leszek; Lukasiewicz, Adam; Borys, Jan; Ettl, Tobias

    2016-09-01

    Despite high popularity and great success rates of free osteocutaneous fibula flaps, the flap failure caused by vascular thrombosis is still a challenging problem. The authors present their evaluation of a potential thrombosis risk factor - a peroneal artery-vein index. The authors evaluated the diameters of peroneal vessels and peroneal artery-vein indexes based on the computed tomography angiographies in 10 patients who underwent a mandible reconstruction with a free fibula flap and compared the results with clinical outcome. In one case the flap was lost, because of thrombosis in the donor vein. This patient presented superficial varicose veins of both lower extremities. Peroneal vein diameters in this patient ranged from 5,05 mm to 6,68 mm and were higher than in patients without complications. The peroneal artery-vein index in the patient with thrombosis ranged from 0,37 to 0,50 with median 0,40 and was lower than in patients without complications. High disproportion between peroneal artery and concomitant veins might be a potential risk factor of the occurrence of venal thrombosis. Detailed perioperative examination of peroneal veins in patients with varicosities should be considered. Copyright © 2016 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

  2. Lipofibromatous hamartoma of the superficial peroneal nerve: Two case reports

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    Ying-Ling Kuo

    2012-03-01

    Full Text Available Lipofibromatous hamartoma, a rarely occurring nerve hamartoma, can present as an acrochordon, cutaneous cyst or other soft tissue tumor and is usually seen within the first three decades of life. The lesion presents as a slowly growing mass that is largely composed of fat and fibrous tissue with epineural and perineural proliferation. Although such tumors are rare, it is important for physicians to be aware of this disorder and recognize its signs because patients may present with what appears to be a benign skin tumor. If left untreated, the lesion may result in nerve compression and eventually lead to the development of peripheral neuropathy. Here, we present two cases of lipofibromatous hamartomas that presented over the ankle and dorsal foot, respectively, that appeared as simple and benign tumors upon initial inspection. Patients were without symptoms or neurological deficits, and diagnosis was not made until histopathological examination of the biopsied specimens. We also discuss the clinical manifestations, histopathological findings, and the management of lipofibromatous hamartomas.

  3. Common peroneal nerve entrapment with the communication ...

    African Journals Online (AJOL)

    Sciatic nerve divides into tibial nerve and common peroneal nerve at the level of superior angle of popliteal fossa and variations in its branching pattern are common. The most common nerve entrapment syndrome in the lower limbs is common peroneal nerve entrapment at fibular head. Invariably it can also be trapped in ...

  4. Endoscopic Treatment of Intrasheath Peroneal Tendon Subluxation

    Directory of Open Access Journals (Sweden)

    Frederick Michels

    2013-01-01

    Full Text Available Intrasheath subluxation of the peroneal tendons within the peroneal groove is an uncommon problem. Open exploration combined with a peroneal groove-deepening procedure and retinacular reefing is the recommended treatment. This extensive lateral approach needs incision of the intact superior peroneal retinaculum and repair afterwards. We treated three patients with a painful intrasheath subluxation using an endoscopic approach. During this tendoscopy both tendons were inspected. The distal muscle fibers of the peroneus brevis tendon were resected in two patients. A partial tear was debrided in the third patient. All patients had a good result. No wound-healing problems or other complications occurred. Early return to work and sports was possible. An endoscopic approach was successful in treatment of an intrasheath subluxation of the peroneal tendons.

  5. Retrofibular osteochondroma with peroneal tendon subluxation.

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    Tsang, Jung Yin; Bhosale, Abhijit; Pillai, Anand

    2015-03-01

    Osteochondroma of the bone can cause a range of complications involving tendons, joints and neurovascular structures. Distal fibular osteochondroma and non-traumatic peroneal tendon subluxation are both rare. In this case report, we describe an unusual case of distal retrofibular osteochondroma in a 36-year old male causing peroneal tendon subluxation. He presented with pain and instability around his ankle, but with no history of trauma. He successfully underwent osteochondroma excision, peroneal groove deepening and a Brostrom-Gould type reconstruction for the lateral ankle ligament insufficiency. Complete resolution of the symptoms of instability and subluxation was noted upon 6-month follow up. Copyright © 2014 Elsevier Ltd. All rights reserved.

  6. PERONEAL TENDON LESIONS IN ATHLETES (REVIEW

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    E. E. Achkasov

    2016-01-01

    Full Text Available The authors analyzed scientific literature in respect of various issues in treatment of athletes with peroneal muscles lesions starting from 1987 till 2016. Key search and publications selection was made in PubMed and russian national electronic scientific library eLIBRARY. Peroneal tendons pathology is not the major but the underestimated cause of pain in lateral and hindfoot as well as of foot dysfunction which is difficult to distinguish from lesions of lateral ligaments of the ankle joint. Untreated lesions of peroneal tendons can result in chronic ankle pain and significant functional disorders. The purpose of the present paper is to improve the current comprehension of anatomy, to identify factors contributing to pathology, to perform diagnostic evaluation of peroneal tendons and to review current treatment options of such lesions.

  7. Peroneal neuropathy after liver transplantation.

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    Yoon, J S; Gwak, M S; Yang, M; Kim, G S; Kwon, C H; Joh, J W; Lee, S K; Kim, S J

    2008-10-01

    The incidence of peroneal neuropathy (PN), occurring predominantly in the left leg, increases after the incorporation of intermittent pneumatic compression (IPC) devices among adult liver transplantation (OLT) recipients in our hospital. The aim of this study was to investigate the possible risk factors for PN and the reason for the left-leg predominance. We retrospectively reviewed the medical records of 501 OLT recipients. The patients were first divided into 2 groups, PN (n = 33) and non-PN (n = 468), to assess possible risk factors. The patients were then categorized into IPC (n = 262) and non-IPC (n = 239) groups according to the use of IPC devices. In a subsequent prospective study, we measured the degree and duration of the tilt of the operating table during OLT to investigate their relationship to the predominant left-leg PN. The rate of IPC device use was significantly greater among the PN than non-PN group (78.8% vs 50.4%, P table were greater and longer than the right tilt. The use of IPC devices during OLT increased the occurrence of PN and the left tilt of the operating table was strongly related to the predominant left-leg PN. Careful protection of the vulnerable point and minimization of the tilting of the operating table is advised during OLT, especially when IPC devices are used.

  8. Tendoscopic treatment of recurrent peroneal tendon dislocation

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    Scholten, Peter E.; Breugem, Stefan J. M.; van Dijk, C. Niek

    2013-01-01

    To study the possibility of tendoscopic treatment of recurrent peroneal tendon dislocation. The case of one patient is described including the tendoscopic technique to deepen the fibular groove. In this single case, there were no complications, recovery time was short, and there was no recurrence of

  9. Functional outcome after peroneal nerve injury

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    de Bruijn, I.; Geertzen, J.H.; Dijkstra, P.U.

    2007-01-01

    The objective of this study was to describe muscle strength, ankle-foot orthosis (AFO) use, walking ability, participation and quality of life in patients with peroneal nerve injury. A historic cohort study (n = 27) was performed with a median follow-up time of 61 months (inter quartile range

  10. Oromandibular reconstruction with chimeric double-skin paddle flap based on peroneal vessel axis for synchronous opposite double oral cancer.

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    Huang, Shih-Tsai; Liu, Wen-Chung; Chen, Lee-Wei; Yang, Kuo-Chung

    2015-05-01

    Synchronous double oral cancer represents the minority of cases of head and neck cancer. After tumor ablation, 2 separate oromandibular defects, even combined with a through-and-through oral defect, pose a serious reconstructive challenge. The ideal method for reconstruction remains controversial. Based on the peroneal vessel axis, a chimeric double-skin paddle peroneal fasciocutaneous or fibular osteomyocutaneous flap could be designed to accomplish the difficult reconstruction. Six male patients, each with 2 separate oromandibular defects after tumor ablation of synchronous double oral cancer, received double-skin paddle flap reconstruction with 3 peroneal fasciocutaneous and 3 fibular osteomyocutaneous flaps. All 6 flaps survived; however, complications included 1 skin paddle lost due to insufficient perfusion of a visible perforator, and 1 superficial necrosis occurring over the tip of a longer skin paddle. One postoperative intraoral infection and 1 donor site infection were also reported. During follow-up, 3 months later, 1 patient succumbed to local recurrence and bony metastasis. One patient developed a new cancer in the maxillary gingiva, and another had osteoradionecrosis 8 months later. Four patients gained acceptable cosmesis with good oral competence. A chimeric flap based on the peroneal artery could provide a segment of fibular bone, 1 or 2 skin paddles, and a cuff of the flexor hallucis longus muscle simultaneously. For 1-stage reconstruction of separate oromandibular defects after tumor ablation of synchronous double oral cancer, this design could provide all components at 1 transfer.

  11. Peroneal artery pseudoaneurysm – a case report and literature review

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    Hayes Paul

    2007-03-01

    Full Text Available Abstract Background Aneurysms of the peroneal artery are infrequent and consist mainly of pseudoaneurysms. Case presentation This report describes an unusual case of peroneal pseudoaneurysm developing after thromoboembolectomy with a Fogarty catheter. It was managed successfully using an endovascular technique consisting of selective catheterization and coil embolization. The coils were placed in the peroneal artery, both proximal and distal to the pseudoaneurysm. Conclusion Endovascular technique can be successfully used to treat pseudoaneurysms in difficult settings.

  12. Bilateral ganglion cyst of the common peroneal nerve

    Energy Technology Data Exchange (ETDEWEB)

    Pedrazzini, Massimo; Cusmano, Ferdinando; Armaroli, Sara; Pavone, Paolo [Institute of Radiology, University of Parma, Viale Gramsci 14, 43100 Parma (Italy); Pogliacomi, Francesco; Rinaldi, Elio [Institute of Clinical Orthopedics and Traumatology, University of Parma, Viale Gramsci 14, 43100 Parma (Italy)

    2002-11-01

    Ganglion cysts of the common peroneal nerve are rarely described in the literature and a bilateral lesion has not been previously reported. We present a case of a 41-year-old man with a bilateral cyst of the common peroneal nerve diagnosed with ultrasound and magnetic resonance imaging. (orig.)

  13. CT of peroneal tendon injury in patients with calcaneal fractures

    International Nuclear Information System (INIS)

    Rosenberg, Z.S.; Feldman, F.; Singson, R.D.

    1986-01-01

    Injury to the peroneal tendons is a major complication of intraarticular calcaneal fractures. Heretofore, the injury has been difficult to diagnose by routine imaging modalities. However, CT studies of 24 intraarticular calcaneal fractures revealed evidence of peroneal tendon injury in 22 cases. The pathologic conditions included lateral displacement, subluxation, dislocation, and impingement on the tendons by bony fragments, hematomas, and scar tissue. Patients studied 6-12 months after injury had CT evidence consistent with clinical symptoms of peroneal tenosynovitis. Since peroneal tendon injury is surgically correctable, it should be differentiated from other known and more obvious complications, of calcaneal fractures. CT therefore serves as a valuable, noninvasive tool in evaluating these otherwise nonvisualized soft tissue structures in the immediate posttraumatic period as well as during long-term follow up

  14. Superficial venous disease.

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    Brown, Kellie R; Rossi, Peter J

    2013-08-01

    Superficial venous disease is a common clinical problem. The concerning disease states of the superficial venous system are venous reflux, varicose veins, and superficial venous thrombosis. Superficial venous reflux can be a significant contributor to chronic venous stasis wounds of the lower extremity, the treatment of which can be costly both in terms of overall health care expenditure and lost working days for affected patients. Although commonly thought of as a benign process, superficial venous thrombosis is associated with several underlying pathologic processes, including malignancy and deep venous thrombosis. Published by Elsevier Inc.

  15. Myoelectric stimulation on peroneal muscles resists simulated ankle sprain motion.

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    Fong, Daniel Tik-Pui; Chu, Vikki Wing-Shan; Chan, Kai-Ming

    2012-07-26

    The inadequate reaction time of the peroneal muscles in response to an incorrect foot contact event has been proposed as one of the etiological factors contributing to ankle joint inversion injury. Thus, the current study aimed to investigate the efficacy of a myoelectric stimulation applied to the peroneal muscles in the prevention of a simulated ankle inversion trauma. Ten healthy male subjects performed simulated inversion and supination tests on a pair of mechanical sprain simulators. An electrical signal was delivered to the peroneal muscles of the subjects through a pair of electrode pads. The start of the stimulus was synchronized with the drop of the sprain simulator's platform. In order to determine the maximum delay time which the stimulus could still resist the simulated ankle sprain motion, different delay time were test (0, 5, 10, and 15ms). Together with the control trial (no stimulus), there were 5 testing conditions for both simulated inversion and supination test. The effect was quantified by the drop in maximum ankle tilting angle and angular velocity, as determined by a motion analysis system with a standard laboratory procedure. Results showed that the myoelectric stimulation was effective in all conditions except the one with myoelectric stimulus delayed for 15ms in simulated supination test. It is concluded that myoelectric stimulation on peroneal muscles could resist an ankle spraining motion. Copyright © 2012 Elsevier Ltd. All rights reserved.

  16. The Level of Fibula Osteotomy and Incidence of Peroneal Nerve ...

    African Journals Online (AJOL)

    2010-06-29

    Jun 29, 2010 ... Journal of Surgical Technique and Case Report | Jan-Jun 2010 | Vol-2 | Issue-1. 17. The Level of Fibula Osteotomy and Incidence of Peroneal. Nerve Palsy in Proximal Tibial Osteotomy. A. O. Ogbemudia, P. F. A. Umebese, A. Bafor, E. Igbinovia, P. E. Ogbemudia. INTRODUCTION. Osteotomy of the fibula is ...

  17. Rehabilitation after surgical treatment of peroneal tendon tears and ruptures

    NARCIS (Netherlands)

    van Dijk, Pim A. D.; Lubberts, Bart; Verheul, Claire; DiGiovanni, Christopher W.; Kerkhoffs, Gino M. M. J.

    2016-01-01

    The purpose of this study was to provide an overview of the available evidence on rehabilitation programmes after operatively treated patients with peroneal tendon tearsand ruptures. A systematic review was performed, and PubMed and EMBASE were searched for relevant studies. Information regarding

  18. [Measurement of external pressure of peroneal nerve tract coming in contact with lithotomy leg holders using pressure distribution measurement system BIG-MAT®].

    Science.gov (United States)

    Mizuno, Ju; Namba, Chikara; Takahashi, Toru

    2014-10-01

    We investigated external pressure on peroneal nerve tract coming in contact with two kinds of leg holders using pressure distribution measurement system BIG- MAT® (Nitta Corp., Osaka) in the lithotomy position Peak contact (active) pressure at the left fibular head region coming in contact with knee-crutch-type leg holder M® (Takara Belmont Corp., Osaka), which supports the left popliteal fossa, was 78.0 ± 26.4 mmHg. On the other hand, peak contact pressure at the left lateral lower leg region coming in contact with boot-support-type leg holder Bel Flex® (Takara Belmont Corp., Osaka), which supports the left lower leg and foot was 26.3±7.9 mmHg. These results suggest that use of knee-crutch-type leg holder is more likely to induce common peroneal nerve palsy at the fibular head region, but use of boot-support-type leg holder dose not easily induce superficial peroneal nerve palsy at the lateral lower leg region, because capillary blood pressure is known to be 32 mmHg. Safer holders for positioning will be developed to prevent nerve palsy based on the analysis of chronological change in external pressure using BIG-MAT® system during anesthesia.

  19. Peroneal Arteriovenous Fistula and Pseudoaneurysm: An Unusual Presentation

    Directory of Open Access Journals (Sweden)

    Kevin C. Ching

    2014-01-01

    Full Text Available Peroneal artery arteriovenous fistulas and pseudoaneurysms are extremely rare with the majority of reported cases due to penetrating, orthopedic, or iatrogenic trauma. Failure to diagnose this unusual vascular pathology may lead to massive hemorrhage or limb threatening ischemia. We report an interesting case of a 14-year-old male who presented with acute musculoskeletal pain of his lower extremity. Initial radiographs were negative. Further imaging workup revealed a peroneal arteriovenous fistula with a large pseudoaneurysm. After initial endovascular intervention was unsuccessful, the vessels were surgically ligated in the operating room. Pathology revealed papillary endothelial hyperplasia consistent with an aneurysm and later genetic testing was consistent with Ehlers-Danlos syndrome Type IV. This case illustrates an unusual cause of acute atraumatic musculoskeletal pain and uncommon presentation of Ehlers-Danlos syndrome.

  20. Evaluation of the scratch collapse test in peroneal nerve compression.

    Science.gov (United States)

    Gillenwater, Justin; Cheng, Jonathan; Mackinnon, Susan E

    2011-10-01

    The scratch collapse test is a recently described provocative test for diagnosis of peripheral nerve compression. The scratch collapse test was studied prospectively in 24 consecutive patients with a diagnosis of common peroneal nerve compression neuropathy. The diagnosis was confirmed by history, physical examination, and electrodiagnostic testing. Provocative testing by the scratch collapse test and Tinel's sign was performed. The scratch collapse test showed a sensitivity of 0.77 and a specificity of 0.99, while the Tinel's sign showed 0.65 and 0.99, respectively. The scratch collapse test is a sensitive and specific provocative test that compares favorably to existing clinical tests and aids in the diagnosis of common peroneal neuropathy. Diagnostic, II.

  1. Bilateral Common Peroneal Nerve Entrapment After Excessive Weight Loss: Case Report and Review of the Literature.

    Science.gov (United States)

    Margulis, Michael; Ben Zvi, Lior; Bernfeld, Benjamin

    2018-03-02

    We report a case of excessive weight loss causing bilateral common peroneal nerve entrapment in a 60-year-old patient. The bilateral peroneal involvement suggested a systemic cause. Excessive weight loss during a relatively short period can cause changes in the tissues surrounding the common peroneal nerve and lead to its entrapment in the peroneal tunnel. Our patient underwent successful surgical decompression with significant improvement. Copyright © 2017 The American College of Foot and Ankle Surgeons. Published by Elsevier Inc. All rights reserved.

  2. "Forging the Fatherland": Work and Vocational Education in Argentina during Peronism (1944-1955)

    Science.gov (United States)

    Oelsner, Veronica

    2013-01-01

    This article focuses on the reforms in the field of vocational education, as well as on representations related to work, in Argentina during Peron's political leadership. In the framework of far-reaching economic reforms and social transformations, while in the position of secretary of labour (1943-1945) Peron started a vocational education…

  3. Alargamiento en agenesia de tibia y peroné

    OpenAIRE

    Fernández Palazzi, F.; Seda, C. de; Palacio, D.; González Rodríguez, C.

    1992-01-01

    Las displasias o defectos congénitos (parciales o totales) de la pierna pueden a fin didáctico subdividirse en deficiencia congénita de la tibia y en deficiencia congénita del peroné. Los miembros inferiores se originan de la llamada "yema de extremidades" provenientes del mesenquima y apareciendo al final de la cuarta semana, y están opuestas a los segmentos lumbares extendiéndose ventralmente. Los centros primarios de osificación de las diafisis de los huesos a...

  4. Protruded superficial esophageal carcinoma

    International Nuclear Information System (INIS)

    Yamada, Akiyoshi; Satoh, Yuichi; Sugiyama, Akinori

    1986-01-01

    Until the end of 1985, 113 cases of superficial esophageal carcinoma had been operated on. Classified by histology, almost all cases are squamous cell carcinoma and some cases are pseudocarcinoma, adenocarcinoma, adenoid cystic carcinoma, basal cell carcinoma and so on. X-ray of the latter shows all cases except one are protruded type. Regarding the relation between X-ray findings and histology, semipeduncular tumorous type, generally speaking, belongs to pseudosarcoma. As to lymph node metastasis, there is no difference among superficial elevated, tumorous elevated and semi-peduncular tumorous types. Lymph node metastasis is less freqently seen in the cases with smooth surface. With regard to prognosis, there is no difference between early carcinoma without lymph node metastasis and superficial carcinoma with lymph node metastasis. Only two-year and more than 7-year survival rates of the one with smooth surface are superior to those of the one with irregular surface. (author)

  5. High-resolution US and MR imaging of peroneal tendon injuries.

    Science.gov (United States)

    Taljanovic, Mihra S; Alcala, Jennifer N; Gimber, Lana H; Rieke, Joshua D; Chilvers, Margaret M; Latt, L Daniel

    2015-01-01

    Injuries of the peroneal tendon complex are common and should be considered in every patient who presents with chronic lateral ankle pain. These injuries occur as a result of trauma (including ankle sprains), in tendons with preexisting tendonopathy, and with repetitive microtrauma due to instability. The peroneus brevis and peroneus longus tendons are rarely torn simultaneously. Several anatomic variants, including a flat or convex fibular retromalleolar groove, hypertrophy of the peroneal tubercle at the lateral aspect of the calcaneus, an accessory peroneus quartus muscle, a low-lying peroneus brevis muscle belly, and an os peroneum, may predispose to peroneal tendon injuries. High-resolution 1.5-T and 3-T magnetic resonance (MR) imaging with use of dedicated extremity coils and high-resolution ultrasonography (US) with high-frequency linear transducers and dynamic imaging are proved to adequately depict the peroneal tendons for evaluation and can aid the orthopedic surgeon in injury management. An understanding of current treatment approaches for partial- and full-thickness peroneal tendon tears, subluxation and dislocation of these tendons with superior peroneal retinaculum (SPR) injuries, intrasheath subluxations, and peroneal tendonopathy and tenosynovitis can help physicians achieve a favorable outcome. Patients with low functional demands do well with conservative treatment, while those with high functional demands may benefit from surgery if nonsurgical treatment is unsuccessful. Radiologists should recognize the normal anatomy and specific pathologic conditions of the peroneal tendons at US and MR imaging and understand the various treatment options for peroneal tendon and SPR superior peroneal retinaculum injuries. Online supplemental material is available for this article. RSNA, 2015

  6. Peroneal tendinosis as a predisposing factor for the acute lateral ankle sprain in runners.

    Science.gov (United States)

    Ziai, Pejman; Benca, Emir; Wenzel, Florian; Schuh, Reinhard; Krall, Christoph; Auffahrt, Alexander; Hofstetter, Martin; Windhager, Reinhard; Buchhorn, Tomas

    2016-04-01

    A painful episode in the region of the peroneal tendons, within the retromalleolar groove, is a common precipitating event of an acute lateral ankle sprain. A forefoot striking pattern is suspected to cause peroneal tendinosis. The aim of this study is to analyse the role of peroneal tendinosis as a predisposing factor for ankle sprain trauma in runners. Fifty-eight runners who had experienced acute ankle sprain trauma, with pre-existing pain episodes for up to 4 weeks in the region of the peroneal tendons, were assessed clinically. Fractures were excluded by conventional radiography. An magnetic resonance imaging (MRI) scan had been performed within 14 days after the traumatic event and was subsequently evaluated by two experienced radiologists. MRI revealed peroneal tendinosis in 55 patients (95% of the total study population). Peroneus brevis (PB) tendinosis was found in 48 patients (87% of all patients with peroneal tendinosis), and peroneus longus (PL) tendinosis was observed in 42 cases (76%). Thirty-five patients (64%) had combined PB and PL tendinosis. A lesion of the anterior talofibular ligament was found to be the most common ligament injury associated with peroneal tendinosis (29 cases; 53%), followed by a lesion of the calcaneofibular ligament (16 cases; 29%) and a lesion of the posterior tibiofibular ligament (13 cases; 24%). The results of this study reflect the correlation between peroneal tendinosis and ankle sprain trauma. Injuries of one or more ligaments are associated with further complications. A period of rest or forbearance of sports as well as adequate treatment of the peroneal tendinosis is essential to prevent subsequent ankle injuries, especially in runners. Modification of the running technique would also be beneficial. IV.

  7. SUPERFICIAL CERVICAL PLEXUS BLOCK

    Directory of Open Access Journals (Sweden)

    Komang Mega Puspadisari

    2014-01-01

    Full Text Available Superficial cervical plexus block is one of the regional anesthesia in  neck were limited to thesuperficial fascia. Anesthesia is used to relieve pain caused either during or after the surgery iscompleted. This technique can be done by landmark or with ultrasound guiding. The midpointof posterior border of the Sternocleidomastoid was identified and the prosedure done on thatplace or on the level of cartilage cricoid.

  8. Common Superficial Bursitis.

    Science.gov (United States)

    Khodaee, Morteza

    2017-02-15

    Superficial bursitis most often occurs in the olecranon and prepatellar bursae. Less common locations are the superficial infrapatellar and subcutaneous (superficial) calcaneal bursae. Chronic microtrauma (e.g., kneeling on the prepatellar bursa) is the most common cause of superficial bursitis. Other causes include acute trauma/hemorrhage, inflammatory disorders such as gout or rheumatoid arthritis, and infection (septic bursitis). Diagnosis is usually based on clinical presentation, with a particular focus on signs of septic bursitis. Ultrasonography can help distinguish bursitis from cellulitis. Blood testing (white blood cell count, inflammatory markers) and magnetic resonance imaging can help distinguish infectious from noninfectious causes. If infection is suspected, bursal aspiration should be performed and fluid examined using Gram stain, crystal analysis, glucose measurement, blood cell count, and culture. Management depends on the type of bursitis. Acute traumatic/hemorrhagic bursitis is treated conservatively with ice, elevation, rest, and analgesics; aspiration may shorten the duration of symptoms. Chronic microtraumatic bursitis should be treated conservatively, and the underlying cause addressed. Bursal aspiration of microtraumatic bursitis is generally not recommended because of the risk of iatrogenic septic bursitis. Although intrabursal corticosteroid injections are sometimes used to treat microtraumatic bursitis, high-quality evidence demonstrating any benefit is unavailable. Chronic inflammatory bursitis (e.g., gout, rheumatoid arthritis) is treated by addressing the underlying condition, and intrabursal corticosteroid injections are often used. For septic bursitis, antibiotics effective against Staphylococcus aureus are generally the initial treatment, with surgery reserved for bursitis not responsive to antibiotics or for recurrent cases. Outpatient antibiotics may be considered in those who are not acutely ill; patients who are acutely ill

  9. High-resolution 3-T MR neurography of peroneal neuropathy

    Energy Technology Data Exchange (ETDEWEB)

    Chhabra, Avneesh; Faridian-Aragh, Neda; Chalian, Majid; Soldatos, Theodoros; Thawait, Shrey K. [Johns Hopkins Hospital, The Russell H. Morgan Department of Radiology and Radiological Science, Baltimore, MD (United States); Williams, Eric H. [Johns Hopkins Hospital, Department of Plastic Surgery, Baltimore, MD (United States); Dellon Institute for Peripheral Nerve Surgery, Baltimore, MD (United States); Andreisek, Gustav [University Hospital Zurich, Institute for Diagnostic Radiology, Department of Medical Radiology, Zurich (Switzerland)

    2012-03-15

    The common peroneal nerve (CPN), a major terminal branch of the sciatic nerve, can be subject to a variety of pathologies, which may affect the nerve at any level from the lumbar plexus to its distal branches. Although the diagnosis of peripheral neuropathy is traditionally based on a patient's clinical findings and electrodiagnostic tests, magnetic resonance neurography (MRN) is gaining an increasing role in the definition of the type, site, and extent of peripheral nerve disorders. Current high-field MR scanners enable high-resolution and excellent soft-tissue contrast imaging of peripheral nerves. In the lower extremities, MR neurography has been employed in the demonstration of the anatomy and pathology of the CPN, as well as in the detection of associated secondary muscle denervation changes. This article reviews the normal appearance of the CPN as well as typical pathologies and abnormal findings at 3.0-T MR neurography of the lower extremity. (orig.)

  10. Peron võitleb enda Argentinale väljaandmisega / Heiki Suurkask

    Index Scriptorium Estoniae

    Suurkask, Heiki, 1972-

    2007-01-01

    Argentina endisel presidendil Isabel Peronil oli Argentina praeguse võimu hinnangul kontakte nn. surmaüksustega, mis mõrvasid vasakpoolseid aktiviste. I. Peron pandi Hispaanias koduaresti. Lisa: Ööklubi lavalt presidenditoolile

  11. Superficial Bladder Cancer Therapy

    Directory of Open Access Journals (Sweden)

    Emmanuel Schenkman

    2004-01-01

    Full Text Available Bladder cancer treatment remains a challenge despite significant improvements in preventing disease progression and improving survival. Intravesical therapy has been used in the management of superficial transitional cell carcinoma (TCC of the urinary bladder (i.e. Ta, T1, and carcinoma in situ with specific objectives which include treating existing or residual tumor, preventing recurrence of tumor, preventing disease progression, and prolonging survival. The initial clinical stage and grade remain the main determinant factors in survival regardless of the treatment. Prostatic urethral mucosal involvement with bladder cancer can be effectively treated with Bacillus Calmette-Guerin (BCG intravesical immunotherapy. Intravesical chemotherapy reduces short-term tumor recurrence by about 20%, and long-term recurrence by about 7%, but has not reduced progression or mortality. Presently, BCG immunotherapy remains the most effective treatment and prophylaxis for TCC (Ta, T1, CIS and reduces tumor recurrence, disease progression, and mortality. Interferons, Keyhole-limpet hemocyanin (KLH, bropirimine and Photofrin-Photodynamic Therapy (PDT are under investigation in the management of TCC and early results are encouraging. This review highlights and summarizes the recent advances in therapy for superficial TCC.

  12. Anomalous top magnetic couplings

    Indian Academy of Sciences (India)

    2012-11-09

    Nov 9, 2012 ... Corresponding author. E-mail: remartinezm@unal.edu.co. Abstract. The real and imaginary parts of the one-loop electroweak contributions to the left and right tensorial anomalous couplings of the tbW vertex in the Standard Model (SM) are computed. Keywords. Top; anomalous. PACS Nos 14.65.Ha; 12.15 ...

  13. superficial brachial artery terminiating as radial and superficial ulnar ...

    African Journals Online (AJOL)

    superficial brachial artery terminiating as radial and superficial ulnar arteries: a case report. P V Prasad Rao, S C Chaudhary. Abstract. No Abstract. Central African Journal of Medicine Vol. 47 (3) 2001: pp. 78-80. Full Text: EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT.

  14. Superficial fungal infections.

    Science.gov (United States)

    Kelly, Brendan P

    2012-04-01

    Tinea capitis, tinea corporis, and pityriasis versicolor are common superficial fungal infections in the pediatric population. • Tinea capitis is the most common dermatophyte infection worldwide. In North America, the cause is almost exclusively T tonsurans. Diagnosis of tinea capitis usually can be made by clinical features alone, especially when occipital or postauricular lymphadenopathy is present. Skin scrapings prepared with potassium hydroxide for microscopic examination, or a cotton swab for fungal culture, usually are diagnostic. • Treatment of tinea capitis requires systemic antifungal therapy. Terbinafine and griseofulvin are both effective against T tonsurans and are FDA-approved for this indication in children. • Adjunctive topical therapy for the patient and household contacts decreases transmission of this infection. • Topical antifungal therapy usually is effective for tinea corporis and pityriasis versicolor. However, recurrences of pityriasis versicolor are common.

  15. Anatomical study of terminal peroneal artery perforators and their clinical applications

    Directory of Open Access Journals (Sweden)

    Rajendran Purushothaman

    2013-01-01

    Full Text Available Introduction: Peroneal artery gives off plenty of perforators that pass through fascial septum to supply skin and tenosynovium of peroneal muscles. Aim: The aim of this study was to study the anatomical basis of perforators from terminal part of peroneal artery axiality and to make use of this knowledge in reconstructing defects of posterior heel with the advantage of reducing the morbidity of conventional flaps. Materials and Methods: Our study was conducted at Department of Plastic surgery, Madras Medical College and Rajiv Gandhi Government General Hospital, India. We have carried out eleven cadaver dissections (from six cadavers-four fresh cadavers and two preserved cadavers and delineated all septocutaneous and septosynovial perforators of distal peroneal axis and studied their relation with short saphenous vein (SSV and sural nerve. Using this anatomical knowledge we have fashioned perforator based flaps in 13 patients (three propeller, four V-Y advancement, six tenosynovial flaps for reconstruction of defects over tendo achilles and pericalcaneal region . Results: In all cases, SSV and sural nerve were preserved and donor site was closed primarily. No total flap loss was noted. Conclusion: Perforator based flaps from distal most part of peroneal artery provide a good and reliable method for reconstruction of pericalcaneal and tendo achilles region defects with preservation of SSV and sural nerve. It also avoids contour deformity of the grafted donor site of the classical lateral calcaneal artery axial flap.

  16. An Uncommon Case of Bilateral Peroneal Nerve Palsy following Delivery: A Case Report and Review of the Literature

    Directory of Open Access Journals (Sweden)

    Kristen Bunch

    2014-01-01

    Full Text Available Peroneal nerve palsy is an infrequent but potential complication of childbirth. Bilateral peroneal palsy is particularly rare following delivery with few reported cases. A 38-year-old gravida 1, para 0 underwent a prolonged second stage of labor, was diagnosed with an arrest of descent, and subsequently underwent an uncomplicated primary cesarean section. The patient was diagnosed with bilateral peroneal neuropathy four days after delivery. By two months postpartum, her foot drop had improved by 85% and the remainder of her symptoms resolved. Awareness of the risks of a peroneal neuropathy as well as implementation of preventive measures is important for members of the delivery team. Regional anesthesia during labor is a risk factor for the development of a peroneal neuropathy.

  17. Anomalous carbon nuclei

    International Nuclear Information System (INIS)

    Gasparian, A.P.

    1984-01-01

    Results are presented from a bubble chamber experiment to search for anomalous mean free path (MFP) phenomena for secondary multicharged fragments (Zsub(f)=5 and 6) of the beam carbon nucleus at 4.2 GeV/c per nucleon. A total of 50000 primary interactions of carbon with propane (C 3 H 8 ) were created. Approximately 6000 beam tragments with charges Zsub(f)=5 and 6 were analyzed in detail to find out an anomalous decrease of MFP. The anomaly is observed only for secondary 12 C nuclei

  18. Chiral anomalous dispersion

    Science.gov (United States)

    Sadofyev, Andrey; Sen, Srimoyee

    2018-02-01

    The linearized Einstein equation describing graviton propagation through a chiral medium appears to be helicity dependent. We analyze features of the corresponding spectrum in a collision-less regime above a flat background. In the long wave-length limit, circularly polarized metric perturbations travel with a helicity dependent group velocity that can turn negative giving rise to a new type of an anomalous dispersion. We further show that this chiral anomalous dispersion is a general feature of polarized modes propagating through chiral plasmas extending our result to the electromagnetic sector.

  19. Vibration upshot of operating mechanical sewing machine: an insight into common peroneal nerve conduction study.

    Science.gov (United States)

    Yadav, Prakash Kumar; Yadav, Ram Lochan; Sharma, Deepak; Shah, Dev Kumar; Sapkota, Niraj Khatri; Thakur, Dilip; Limbu, Nirmala; Islam, Md Nazrul

    2017-01-01

    Most of the people associated with tailoring occupation in Nepal are still using mechanical sewing machine as an alternative of new technology for tailoring. Common peroneal nerves of both right and left legs are exposed to strenuous and chronic stress exerted by vibration and paddling of mechanical sewing machine. The study included 30 healthy male tailors and 30 healthy male individuals. Anthropometric variables as well as cardio respiratory variables were determined for each subject. Standard Nerve Conduction Techniques using constant measured distances were applied to evaluate common peroneal nerve (motor) in both legs of each individual. Data were analyzed and compared between study and control groups using Man Whitney U test setting the significance level p  ≤ 0.05. Anthropometric and cardio respiratory variables were not significantly altered between the study and control groups. The Compound muscle action potential (CMAP) latency of common peroneal nerves of both right [(11.29 ± 1.25 vs. 10.03 ± 1.37), P  sewing machine by paddling chronically and arduously could have attributed to abnormal nerve conduction study parameters due to vibration effect of the machine on right and left common peroneal nerves. The results of present study follow the trend towards presymptomatic or asymptomatic neuropathy similar to subclinical neuropathy.

  20. Transluminal Angioplasty of Peroneal Artery Branches in Diabetics: Initial Technical Experience

    International Nuclear Information System (INIS)

    Graziani, Lanfroi; Silvestro, Antonio; Monge, Luca; Boffano, Gian Mario; Kokaly, Francesco; Casadidio, Ilaria; Giannini, Francesco

    2008-01-01

    The present study aimed to report the technical feasibility of percutaneous transluminal angioplasty (PTA) of obstructed or insufficient collateral branches (anterior and posterior perforating branches) from distal peroneal to foot arteries in diabetic patients with chronic critical limb ischemia (CLI) and chronic noncrossable occlusion of the anterior and posterior tibial arteries. Twenty-four diabetic CLI patients (age, 67 ± 8 years; 87% males) undergoing collateral PTA were included. Baseline clinical angiographic and follow-up data were retrospectively reviewed. Collateral PTA was associated with a concomitant PTA of other sites in 21 (83%) cases. In 15 cases the treated collateral linked the peroneal with the plantaris communis; in 9 cases, the peroneal with the dorsalis pedis. Angiographic results of collateral PTA were good in 13 cases (<30% residual stenosis), whereas the result was considered moderate (30%-49% residual stenosis) in the remaining cases. Neither perforation nor acute occlusion of the treated collaterals or other relevant complications were observed. Mean follow-up was 32 ± 17 months. Major amputation was necessary for two (8.3%) patients. Cumulative limb salvage rates at 2 and 4 years were 96% and 87%, respectively. In conclusion, this initial experience shows that PTA of the collateral branches from distal peroneal to foot arteries is a feasible technique. Future studies are required to define the clinical role of this novel approach

  1. Reconstruction of distal hand and foot defects with the free proximal peroneal artery perforator flap.

    Science.gov (United States)

    Scaglioni, Mario F; Kuo, Yur-Ren; Chen, Yen-Chou

    2016-03-01

    The proximal peroneal artery perforator (PPAP) flap is a reliable, thin fasciocutaneous flap. The purpose of this article was to report our experience with the use of free PPAP flaps for reconstruction of defects of the distal hand and foot. From November 2012 to September 2013, 9 patients received reconstruction with 10 free PPAP flaps. The defect locations included the big toe (2 cases), metatarsophalangeal joint (5 cases), dorsal finger (2 cases) and volar finger (1 case). Flaps were raised based on proximal peroneal perforator vessels without sacrificing the peroneal artery. The first dorsal metatarsal artery (5 cases) and digital artery (5 cases) were dissected as recipient vessels. The flap sizes varied from 2.5 x 2 cm to 9 x 5 cm. All of flaps were survival after surgery. One flap suffered from venous thrombosis and was successfully salvaged by performing a venous thrombectomy and vein graft. The donor sites were all primarily closed with minimal morbidities. Follow-up observations were conducted for 7 to 20 months, and all patients had good functional recovery with satisfying cosmetic results. Perforators arising from the peroneal artery in the proximal lateral leg can be used to design small, pliable fasciocutaneous flaps. Although the pedicle is short, the vessel diameter is adequate for microvascular anastomosis to the distal foot and hand recipient vessels. The free PPAP flap may be a good option for reconstructing distal hand and foot defects. © 2014 Wiley Periodicals, Inc.

  2. Manual therapy and neurodynamic mobilization in a patient with peroneal nerve paralysis: a case report.

    Science.gov (United States)

    Villafañe, Jorge Hugo; Pillastrini, Paolo; Borboni, Alberto

    2013-09-01

    The purpose of this case report is to describe a therapeutic intervention for peroneal nerve paralysis involving the sciatic nerve. A 24-year-old man presented with peroneal nerve paralysis with decreased sensation, severe pain in the popliteal fossa, and steppage gait, which occurred 3 days prior to the consultation. Magnetic resonance imaging and electromyography confirmed lumbar disk herniation with sciatic common peroneal nerve entrapment in the popliteal fossa. A combined treatment protocol of spinal and fibular head manipulation and neurodynamic mobilization including soft tissue work of the psoas and hamstring muscles was performed. Outcome measures were assessed at pretreatment, 1 week posttreatment, and 3-month follow-up and included numeric pain rating scale, range of motion, pressure pain threshold, and manual muscle testing. Treatment interventions were applied for 3 sessions over a period of 1 week. Results showed reduction of the patient's subjective pain and considerable improvement in range of motion, strength, and sensation in his left foot, which was restored to full function. A combined program of spinal and fibular head manipulation and neurodynamic mobilization reduced pain, increased range of motion and strength, and restored full function to the left leg in this patient who had severe functional impairment related to a compressed left common peroneal nerve.

  3. Predictors of chronic ankle instability: Analysis of peroneal reaction time, dynamic balance and isokinetic strength.

    Science.gov (United States)

    Sierra-Guzmán, Rafael; Jiménez, Fernando; Abián-Vicén, Javier

    2018-03-06

    Previous studies have reported the factors contributing to chronic ankle instability, which could lead to more effective treatments. However, factors such as the reflex response and ankle muscle strength have not been taken into account in previous investigations. Fifty recreational athletes with chronic ankle instability and 55 healthy controls were recruited. Peroneal reaction time in response to sudden inversion, isokinetic evertor muscle strength and dynamic balance with the Star Excursion Balance Test and the Biodex Stability System were measured. The relationship between the Cumberland Ankle Instability Tool score and performance on each test was assessed and a backward multiple linear regression analysis was conducted. Participants with chronic ankle instability showed prolonged peroneal reaction time, poor performance in the Biodex Stability System and decreased reach distance in the Star Excursion Balance Test. No significant differences were found in eversion and inversion peak torque. Moderate correlations were found between the Cumberland Ankle Instability Tool score and the peroneal reaction time and performance on the Star Excursion Balance Test. Peroneus brevis reaction time and the posteromedial and lateral directions of the Star Excursion Balance Test accounted for 36% of the variance in the Cumberland Ankle Instability Tool. Dynamic balance deficits and delayed peroneal reaction time are present in participants with chronic ankle instability. Peroneus brevis reaction time and the posteromedial and lateral directions of the Star Excursion Balance Test were the main contributing factors to the Cumberland Ankle Instability Tool score. No clear strength impairments were reported in unstable ankles. Copyright © 2018. Published by Elsevier Ltd.

  4. Randomized controlled trial of surface peroneal nerve stimulation for motor relearning in lower limb hemiparesis

    NARCIS (Netherlands)

    Sheffler, L.R.; Taylor, P.N.; Gunzler, D.D.; Buurke, Jaap; IJzerman, Maarten Joost; Chae, J.

    2013-01-01

    Objective: To compare the motor relearning effect of a surface peroneal nerve stimulator (PNS) versus usual care on lower limb motor impairment, activity limitation, and quality of life among chronic stroke survivors. Design: Single-blinded randomized controlled trial. Setting: Teaching hospital of

  5. Prevalence of Peroneal Tendon Instability in Calcaneus Fractures: A Systematic Review and Meta-Analysis.

    Science.gov (United States)

    Mahmoud, Karim; Mekhaimar, Mohamed Maged; Alhammoud, Abduljabbar

    2018-03-14

    Peroneal tendon instability associated with an intraarticular calcaneal fracture is a common injury that still often passes undiscovered by both radiologists and orthopedic surgeons. Timely identification of this injury will guide the choice of surgical technique used and treatment of patients. Using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, several databases were searched through June 2017 for any observational or experimental studies that reported the prevalence/incidence of peroneal tendon subluxation/dislocation with a calcaneus fracture with regard to fracture classifications and the significance of the fleck sign. Nine studies were included, with 1027 patients and 1050 calcaneus fractures. The overall prevalence of peroneal instability (PI) in association with a calcaneus fracture was 29.3%. An increasing prevalence of PI increased the severity of the calcaneus fractures, 5.4% in Sanders I, 19% in Sanders II, 39.4% in Sanders III, and 49.5% in Sanders IV. The presence of a fleck sign is a strong indicator of PI, with a prevalence of 54.7%. The computed tomography findings can overestimate the presence of PI compared with the intraoperative findings. The global reported prevalence of peroneal tendon instability associated with intraarticular calcaneal fractures is high and increases with increasing severity of the calcaneus fracture. Copyright © 2017 The American College of Foot and Ankle Surgeons. Published by Elsevier Inc. All rights reserved.

  6. Anomalous Hall effect

    Czech Academy of Sciences Publication Activity Database

    Nagaosa, N.; Sinova, Jairo; Onoda, S.; MacDonald, A. H.; Ong, N. P.

    2010-01-01

    Roč. 82, č. 2 (2010), s. 1539-1592 ISSN 0034-6861 Institutional research plan: CEZ:AV0Z10100521 Keywords : anomalous Hall effect * spintronics Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 51.695, year: 2010

  7. Accuracy of MR findings in characterizing peroneal tendons disorders in comparison with surgery

    Energy Technology Data Exchange (ETDEWEB)

    Park, Hee-Jin; Lee, So-Yeon; Rho, Myung-Ho; Chung, Eun-Chul; Kwag, Hyon-Joo [Dept. of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan Univ., School of Medicine, Suwon (Korea, Republic of); Park, Noh-Hyuck [Dept. of Radiology, Myongji Hospital, Kwandong Univ., Coll. of Medicine (Korea, Republic of)], e-mail: radiology11@hanmail.net

    2012-09-15

    Background: Previous studies have shown that magnetic resonance imaging (MRI) has a high sensitivity for peroneal tendon pathology but more studies with surgery as a reference standard are needed. Purpose: To evaluate the accuracy of MRI compared to surgery for characterizing chronic peroneal tendon pathology. Material and Methods: Ninety-seven patients (57 men, 40 women; mean age, 39 years; range, 15-64 years) with chronic lateral ankle instability underwent MRI followed by surgery, with a mean MR to surgery interval of 30 days. Sagittal, coronal, and axial T1-weighted spin-echo and fat-suppressed T2-weighted fast spin-echo images were obtained for all patients. Two blinded observers evaluated the MR images without clinical information, and the results were compared to surgical findings. The following peroneal injuries were observed: tendon split, interstitial tear, swelling of the tendon, fluid collection, superior peroneal retinaculum injury, and tendon dislocation. Results: Swelling of the peroneus longus tendon was the most common finding on MR imaging, followed by fluid collection and a split of the peroneus brevis tendon. Surgical findings showed that nine cases (9%) of interstitial tears were in the peroneus brevis and two cases (2%) were in the peroneus longus, with eight cases (8%) of splits in the peroneus brevis tendon. The sensitivity and specificity for detecting interstitial tears in the peroneus brevis were 44% and 99%, respectively. The sensitivity and specificity for detecting swelling in the peroneus brevis were 50% and 99%, respectively. The sensitivity and specificity for detecting interstitial tears for peroneus longus injuries were 50% and 96%, respectively. The sensitivity and specificity for detecting swelling in these injuries were and 100% and 96%, respectively. Conclusion: MRI findings of chronic peroneal tendon pathology are diagnostically specific but not sensitive. MRI showed high sensitivity for diagnosing tendon swelling in the

  8. Treatment and Follow Up Outcomes of Patients with Peroneal Nerve Injury: A Single Center Experience

    Directory of Open Access Journals (Sweden)

    Yasar Dagistan

    2017-01-01

    Full Text Available Aim: Trap neuropathy is characterized by compression of the peripheral nerve into fibro osseous channels in trespassing areas of body segments. Peroneal nerve is the most frequently injured nerve in traumatic injuries of the lower extremities. In the present study, we investigated functional results of surgical treatment of patients with peroneal nerve injury who delayed visiting our clinics after the damage; we also aimed to observe the effects of this delay on prognosis. We interpreted postoperative results of the patients with EMG and physical examination findings. Material and Method: Subjects with peroneal nerve damage who visited our clinics between 2012 and 2015 were included in the present study. EMG and muscle motor strength tests were conducted pre and postoperatively for clinical assessment. Results: Of the 16 patients in the study population, 7 were men and 9 were women. The median age of the subjects was 49.6 years (14-77 years. Admission time was 9 months after injury. Causes of the peroneal nerve damage were as follows: prosthesis surgery in 4 (25%, ankle damage in 2 (12.5%, excessive squatting by agriculture workers in 4 (25%, aggressive exercise in 2 (12.5%, bone fracture in 2 (12.5%, and unknown origin in 2 (12.5%. Discussion: Peroneal nerve injury usually occurs by compression of the nerve at the head or neck of the fibula. Results of decompression surgery are usually compromising in non-traumatic nerve palsies. Period of duration between injury and diagnosis and muscular atrophy are main factors associated with success of treatment.

  9. Beta Function and Anomalous Dimensions

    DEFF Research Database (Denmark)

    Pica, Claudio; Sannino, Francesco

    2011-01-01

    We demonstrate that it is possible to determine the coefficients of an all-order beta function linear in the anomalous dimensions using as data the two-loop coefficients together with the first one of the anomalous dimensions which are universal. The beta function allows to determine the anomalous...

  10. Case Study of Oriental Medicine Treatment with Acupotomy Therapy of the Peroneal Nerve Palsy through Ultrasound Case Report

    Directory of Open Access Journals (Sweden)

    Kim Sungha

    2011-03-01

    Full Text Available Purpose: In order to estimate clinical effects of Oriental Medicine Treatment with acupotomy therapy of Peroneal nerve Palsy. Methods: From 10th June, 2010 to 19th June, 2010, 1 female patient diagnosed as Peroneal nerve Palsy(clinical diagnosed was treated with general oriental medicine therapy (acupuncture, pharmacopuncture,moxibustion, cupping, physical therapy, herbal medication and acupotomy. Results: The patient's left foot drop was remarkably improved. Conclusions: This study demonstrates that oriental medical treatment with acuputomy therapy has notable effect in improving symptoms of peroneal nerve palsy. as though we had not wide experience in this treatment, more research is needed.

  11. Anomalous Diffusion Near Resonances

    Energy Technology Data Exchange (ETDEWEB)

    Sen, Tanaji; /Fermilab

    2010-05-01

    Synchro-betatron resonances can lead to emittance growth and the loss of luminosity. We consider the detailed dynamics of a bunch near such a low order resonance driven by crossing angles at the collision points. We characterize the nature of diffusion and find that it is anomalous and sub-diffusive. This affects both the shape of the beam distribution and the time scales for growth. Predictions of a simplified anomalous diffusion model are compared with direct simulations. Transport of particles near resonances is still not a well understood phenomenon. Often, without justification, phase space motion is assumed to be a normal diffusion process although at least one case of anomalous diffusion in beam dynamics has been reported [1]. Here we will focus on the motion near synchro-betatron resonances which can be excited by several means, including beams crossing at an angle at the collision points as in the LHC. We will consider low order resonances which couple the horizontal and longitudinal planes, both for simplicity and to observe large effects over short time scales. While the tunes we consider are not practical for a collider, nonetheless the transport mechanisms we uncover are also likely to operate at higher order resonances.

  12. Novel use of a manual therapy technique and management of a patient with peroneal tendinopathy: a case report.

    Science.gov (United States)

    Hensley, Craig P; Kavchak, Alicia J Emerson

    2012-02-01

    Peroneal tendinopathy is an uncommon but underappreciated source of lateral hindfoot pain and dysfunction. There is a paucity of literature describing optimal intervention for those suffering with pain secondary to peroneal tendinopathy. The purpose of this case report is to describe the evaluation and treatment incorporating manual therapy and therapeutic exercise for a patient diagnosed with peroneal tendinopathy. The patient was a 50 year-old female with a history of chronic lateral ankle pain and whose presentation was consistent with peroneal tendinopathy. Despite attempts to improve pain and function with over-the-counter orthotics, manual therapy to a hypomobile talocrural joint, and strengthening of the peroneal tendons, successful response was not reported until a lateral calcaneal glide was added. Improvement in impairments (pain, talocrural dorsiflexion, unilateral heel raises, and Star Excursion Balance Test) and function (Lower Extremity Functional Scale and Global Rating of Change), were observed over a course of eight visits. The patient was able to return to work and her recreational work out routine without limitations. In conclusion a successful physical therapy intervention for a patient with peroneal tendinopathy included a unique manual therapy technique, the lateral calcaneal glide, in conjunction with other manual therapy techniques and a structured home exercise program. Copyright © 2011 Elsevier Ltd. All rights reserved.

  13. The 'SAFARI' Technique Using Retrograde Access Via Peroneal Artery Access

    Energy Technology Data Exchange (ETDEWEB)

    Zhuang, Kun Da, E-mail: zkunda@gmail.com [Singapore General Hospital, Interventional Radiology Centre (Singapore); Tan, Seck Guan [Singapore General Hospital, Department of General Surgery (Singapore); Tay, Kiang Hiong [Singapore General Hospital, Interventional Radiology Centre (Singapore)

    2012-08-15

    The 'SAFARI' technique or subintimal arterial flossing with antegrade-retrograde intervention is a method for recanalisation of chronic total occlusions (CTOs) when subintimal angioplasty fails. Retrograde access is usually obtained via the popliteal, distal anterior tibial artery (ATA)/dorsalis pedis (DP), or distal posterior tibial artery (PTA). Distal access via the peroneal artery has not been described and has a risk of continued bleeding, leading to compartment syndrome due to its deep location. We describe our experience in two patients with retrograde access via the peroneal artery and the use of balloon-assisted hemostasis for these retrograde punctures. This approach may potentially give more options for endovascular interventions in lower limb CTOs.

  14. Neurilemmoma of Deep Peroneal Nerve Sensory Branch : Thermographic Findings with Compression Test.

    Science.gov (United States)

    Ryu, Seung Jun; Zhang, Ho Yeol

    2015-09-01

    We report a case of neurilemmoma of deep peroneal nerve sensory branch that triggered sensory change with compression test on lower extremity. After resection of tumor, there are evoked thermal changes on pre- and post-operative infrared (IR) thermographic images. A 52-year-old female presented with low back pain, sciatica, and sensory change on the dorsal side of the right foot and big toe that has lasted for 9 months. She also presented with right tibial mass sized 1.2 cm by 1.4 cm. Ultrasonographic imaging revealed a peripheral nerve sheath tumor arising from the peroneal nerve. IR thermographic image showed hyperthermia when the neurilemoma induced sensory change with compression test on the fibular area, dorsum of foot, and big toe. After surgery, the symptoms and thermographic changes were relieved and disappeared. The clinical, surgical, radiographic, and thermographic perspectives regarding this case are discussed.

  15. The “SAFARI” Technique Using Retrograde Access Via Peroneal Artery Access

    International Nuclear Information System (INIS)

    Zhuang, Kun Da; Tan, Seck Guan; Tay, Kiang Hiong

    2012-01-01

    The “SAFARI” technique or subintimal arterial flossing with antegrade–retrograde intervention is a method for recanalisation of chronic total occlusions (CTOs) when subintimal angioplasty fails. Retrograde access is usually obtained via the popliteal, distal anterior tibial artery (ATA)/dorsalis pedis (DP), or distal posterior tibial artery (PTA). Distal access via the peroneal artery has not been described and has a risk of continued bleeding, leading to compartment syndrome due to its deep location. We describe our experience in two patients with retrograde access via the peroneal artery and the use of balloon-assisted hemostasis for these retrograde punctures. This approach may potentially give more options for endovascular interventions in lower limb CTOs.

  16. Optimal Fixation of Jones Fractures Sacrifices the Peroneal Brevis Tendon Insertion andthe Plantar Fascia

    OpenAIRE

    van Dijk, Pim A.d.; Breuking, Sofie; Vopat, Bryan G.; Guss, Daniel; Johnson, Anne H.; Hosseini, Ali; DiGiovanni, Christopher

    2017-01-01

    Objectives: Patients with Jones fractures (JF) frequently undergo operative management with intramedullary screw fixation. Screw insertion through the base of the fifth metatarsal potentially compromises attachment points of the plantar fascia (PF) and peroneal brevis tendon (PB), and appropriate screw length and diameter remains controversial. The aim of this study was to define the anatomy of the fifth metatarsal bone using CT modeling in order to provide better guidance regarding optimized...

  17. Peroneal island flap for wound coverage in complex injuries of the lower extremity

    Directory of Open Access Journals (Sweden)

    Fazal A

    2012-01-01

    Full Text Available Akil Fazal1, Haroon-ur-Rashid1, Tahseen Cheema21Section of Orthopedics, Department of Surgery, Aga Khan University, Karachi, Pakistan; 2Department of Orthopedics and Rehabilitation, University of New Mexico, Albuquerque, NM, USABackground: Complex injuries of the lower extremity pose a therapeutic challenge owing to limited availability of local soft tissue for coverage. One option in this region is the pedicled fasciocutaneous flap based on perforators of the peroneal artery. In this case series, we present our experience of the peroneal island pedicled flap for reconstruction of lower extremity wounds.Methods: Records of 18 cases of peroneal island flap admitted consecutively to the Section of Orthopedics at Aga Khan University Hospital from January 1996 to December of 2009 were studied and their outcomes determined.Results: The most common indication for coverage was open wounds due to a road traffic accident (n = 10, followed by burns (n = 3. The most common area exposed was the lower third of the leg followed by the middle third. The tibia was exposed in 11 patients. The flaps ranged in size from 35 cm2 to over 200 cm2. In 13 patients, the flaps healed uneventfully, while in the remaining five there was partial flap necrosis. In four of the latter patients, the residual wound healed with conservative measures only, but the fifth patient required further surgery to achieve acceptable coverage.Conclusion: The peroneal artery flap appears to be a simple, useful, and reliable flap in the armamentarium of the surgeon when planning soft tissue coverage of the lower extremity.Keywords: leg injuries, surgical flaps, lower extremity

  18. Vascular patterns of upper limb: an anatomical study with accent on superficial brachial artery

    Science.gov (United States)

    Kachlik, David; Konarik, Marek; Baca, Vaclav

    2011-01-01

    The aim of the study was to evaluate the terminal segmentation of the axillary artery and to present four cases of anomalous branching of the axillary artery, the superficial brachial artery (arteria brachialis superficialis), which is defined as the brachial artery that runs superficially to the median nerve. Totally, 130 cadaveric upper arms embalmed by classical formaldehyde technique from collections of the Department of Anatomy, Third Faculty of Medicine, Charles University in Prague, were macroscopically dissected with special focus on the branching arrangement of the axillary artery. The most distal part of the axillary artery (infrapectoral part) terminated in four cases as a bifurcation into two terminal branches: the superficial brachial artery and profunda brachii artery, denominated according to their relation to the median nerve. The profunda brachii artery primarily gave rise to the main branches of the infrapectoral part of the axillary artery. The superficial brachial artery descended to the cubital fossa where it assumed the usual course of the brachial artery in two cases and in the other two cases its branches (the radial and ulnar arteries) passed superficially to the flexors. The incidence of the superficial brachial artery in our study was 5% of cases. The reported incidence is a bit contradictory, from 0.12% to 25% of cases. The anatomical knowledge of the axillary region is of crucial importance for neurosurgeons and specialists using the radiodiagnostic techniques, particularly in cases involving traumatic injuries. The improved knowledge would allow more accurate diagnostic interpretations and surgical treatment. PMID:21342134

  19. Fractal model of anomalous diffusion

    OpenAIRE

    Gmachowski, Lech

    2015-01-01

    An equation of motion is derived from fractal analysis of the Brownian particle trajectory in which the asymptotic fractal dimension of the trajectory has a required value. The formula makes it possible to calculate the time dependence of the mean square displacement for both short and long periods when the molecule diffuses anomalously. The anomalous diffusion which occurs after long periods is characterized by two variables, the transport coefficient and the anomalous diffusion exponent. An...

  20. The Incomplete Superficial Palmar Arch

    Science.gov (United States)

    Gharravi, Anneh Mohammad; Azandeh, Saeed; Gholami, Mohammad Reza; Nejad, Daryoush Bijan

    2013-01-01

    Introduction: Superficial palmar arch (SPA) is dominant vascular structure in palm of hand. In present study we described a case of Ulnar / Radiopalmar pattern of incomplete SPA in an Iranian cadaver. When the SPA is complete, the superficial palmer branches of the radial artery contribute to the ulnar artery. In incomplete type of SPA, there was no anastomosis between the ulnar and radial arteries (UA, RA). Case Report: In the present case, the brachial artery divided into RA and UA at the cubital fossa. There was no anastomosis between radial and ulnar arteries (RA, UA) in the palm of the hand. UA gave three palmar digital arteries; proper palmar digital artery and two common palmar digital arteries. RA gave proper palmar digital artery and arteria princeps pollicis. Conclusion: Knowledge of anatomical variation of SPA is important for the hand surgical interventions and this is a very rare variation which can be easily tested clinically by Allen's test PMID:27298904

  1. Superficial radial neuropathy following venepuncture.

    Science.gov (United States)

    Sheu, J J; Yuan, R Y

    2001-01-01

    A 42-year-old female suffered excruciating pain and paraesthesia on venepuncture of the cephalic vein in her left wrist. The left superficial radial nerve was injured. A flexed wrist during venepuncture renders the superficial radial nerve immobile and vulnerable to being punctured by the needle. To reduce the risk of nerve injury during venepuncture, the phlebotomist should choose a large and visible vein and insert the needle at a 5-15 degrees angle with the skin. The wrist should be selected only if the veins in the antecubital area are deemed unsuitable. The feeling of an electric shock along the distribution of the nerve, or rupture of the vein during venepuncture, should alert the phlebotomist to the possibility of nerve injury and the procedure should be stopped immediately.

  2. [Management of superficial vein thrombosis].

    Science.gov (United States)

    Frappé, Paul; Bertoletti, Laurent; Moulin, Nathalie; Décousus, Hervé

    2015-02-01

    Recent epidemiological studies have highlighted the potential severity of superficial vein thrombosis of the lower limbs (SVT). Diagnosis is based on clinical and Doppler ultrasonography evaluation, and define its therapeutic management. If SVT is associated with objectively confirmed deep vein thrombosis or pulmonary embolism, curative anticoagulation is indicated. If SVT is isolated and measured over 5 cm long, prophylactic dosage of fondaparinux may be provided for 45 days.

  3. The superficial brachial artery passing superficially to the pectoral ansa, the highest superficial brachial artery (Arteria brachialis superficialis suprema).

    Science.gov (United States)

    Honma, Satoru; Kawai, Katsushi; Koizumi, Masahiro; Kodama, Kodo

    2011-06-01

    The human superficial brachial artery passes superficially to the median nerve and can be classified into three subtypes according to its topographical relationship to the pectoral ansa. When the superficial brachial artery passes superficially to the pectoral ansa, it is defined as the highest superficial artery. We found the highest superficial brachial arteries in both arms of a single cadaver. The right one coexisted with a normal axillary artery, and its identification was not difficult. The left one ran medially to the brachial plexus proximally and became superficial to the brachial plexus after branching off the artery, which gave the subscapular artery, then passed between the radial nerve and its accessory root from deep to superficial and ended as an inferior collateral ulnar artery. We also found a muscular axillary arch in each of the arms, both of which were innervated by the medialmost branch from the pectoral ansa. The right highest superficial brachial artery passed deep to the nerve to the muscular axillary arch. We conjectured that the left axillary artery is where the highest superficial brachial artery, as found on the right, coexists with the axillary artery in the case of Adachi's C-type brachial plexus (AxC). Then, the highest superficial brachial artery develops as a main stem, and the latter remains as a rudimentary AxC. Because the left axillary artery is caught on neither the pectoral ansa nor its branches, the left axillary artery can shift medially to the brachial plexus, and its true form is not obvious.

  4. Superficie

    OpenAIRE

    Corna, Pablo María

    2015-01-01

    En la época posclásica del derecho romano se buscó, por parte del Estado y ciudadanos, utilizar ciertos terrenos que formaban parte de su patrimonio para arrendarlos por largo término —y a veces a perpetuidad— a personas que tenían el derecho de edificar o plantar mediante el pago de un precio llamado pensio o solárium. En el siglo II de nuestra era ya era utilizado para asentar tribus romanizadas en la frontera del imperio como para el cultivo de vid y los olivos que demoran varios años e...

  5. Fickian dispersion is anomalous

    Science.gov (United States)

    Cushman, John H.; O'Malley, Dan

    2015-12-01

    The thesis put forward here is that the occurrence of Fickian dispersion in geophysical settings is a rare event and consequently should be labeled as anomalous. What people classically call anomalous is really the norm. In a Lagrangian setting, a process with mean square displacement which is proportional to time is generally labeled as Fickian dispersion. With a number of counter examples we show why this definition is fraught with difficulty. In a related discussion, we show an infinite second moment does not necessarily imply the process is super dispersive. By employing a rigorous mathematical definition of Fickian dispersion we illustrate why it is so hard to find a Fickian process. We go on to employ a number of renormalization group approaches to classify non-Fickian dispersive behavior. Scaling laws for the probability density function for a dispersive process, the distribution for the first passage times, the mean first passage time, and the finite-size Lyapunov exponent are presented for fixed points of both deterministic and stochastic renormalization group operators. The fixed points of the renormalization group operators are p-self-similar processes. A generalized renormalization group operator is introduced whose fixed points form a set of generalized self-similar processes. Power-law clocks are introduced to examine multi-scaling behavior. Several examples of these ideas are presented and discussed.

  6. El peronismo en la historia reciente: Algunas interpretaciones Peronism in Recent History: Some Approaches

    Directory of Open Access Journals (Sweden)

    Marcela Ferrari

    2008-12-01

    Full Text Available A más de veinticinco años de la recuperación democrática en Argentina, este artículo de carácter historiográfico es propuesto como un estado de la cuestión que dé cuenta de los avatares por los que atravesó el Partido Justicialista entre 1983 y 2001. Mediante una selección de la bibliografía producida -primero por sociólogos y politólogos, más tarde por historiadores y antropólogos- procura recorrer los problemas y procesos centrales que atravesaron a la rama política del Movimiento Nacional Justicialista a lo largo de ese período y merecieron una atención preferencial por parte de los cientistas sociales. De allí que haya sido articulado en torno a cuestiones tales como la experiencia renovadora de mediados de la década de los '80, el menemismo y la organización partidaria en el largo plazo. También repara en investigaciones realizadas a escala provincial y aun local, algunas ya cerradas, otras en curso, que ofrecen nuevos matices a una cuestión que hasta hace pocos años era tratada preferentemente en el orden nacional.This article explores the deep renovation in the ideological-cultural field that accompanies the return to democracy in the country, as well as the processes that bring about the formation of a new "cultural atmosphere". Besides, through the conceptual and methodological news in the field, it analyses the production that aims at revisiting Peronism at that time. In so doing, it attempts to tackle the continuity of the lines of the debate that started in previous decades, as well as a whole new line that at the beginning of the 80s began with the analyses of the "cultural battle" between politicians and intellectuals brought about by Peronism after its first decline. The magnetism of Peronism over the historiographical field in the 60s and 70s acquires a renewed vigour in the 80s, due to the political and ideological disputes and controversies in the interior of this political tradition in the period of

  7. Anomalous Dimensions of Conformal Baryons

    DEFF Research Database (Denmark)

    Pica, Claudio; Sannino, Francesco

    2016-01-01

    We determine the anomalous dimensions of baryon operators for the three color theory as function of the number of massless flavours within the conformal window to the maximum known order in perturbation theory. We show that the anomalous dimension of the baryon is controllably small, within...

  8. Anomalous hydrodynamics in two dimensions

    Indian Academy of Sciences (India)

    Keywords. Anomalous hydrodynamics; gauge anomaly; gravitational anomaly. PACS No. 47.10.ab. The chiral anomaly has played a ubiquitous role in modern physics. It has found appli- cations in several diverse fields like quantum wires, quantum Hall effect, chiral magnetic effect and anomalous hydrodynamics, to name ...

  9. Fractal model of anomalous diffusion.

    Science.gov (United States)

    Gmachowski, Lech

    2015-12-01

    An equation of motion is derived from fractal analysis of the Brownian particle trajectory in which the asymptotic fractal dimension of the trajectory has a required value. The formula makes it possible to calculate the time dependence of the mean square displacement for both short and long periods when the molecule diffuses anomalously. The anomalous diffusion which occurs after long periods is characterized by two variables, the transport coefficient and the anomalous diffusion exponent. An explicit formula is derived for the transport coefficient, which is related to the diffusion constant, as dependent on the Brownian step time, and the anomalous diffusion exponent. The model makes it possible to deduce anomalous diffusion properties from experimental data obtained even for short time periods and to estimate the transport coefficient in systems for which the diffusion behavior has been investigated. The results were confirmed for both sub and super-diffusion.

  10. Optically Anomalous Crystals

    CERN Document Server

    Shtukenberg, Alexander; Kahr, Bart

    2007-01-01

    Optical anomalies in crystals are puzzles that collectively constituted the greatest unsolved problems in crystallography in the 19th Century. The most common anomaly is a discrepancy between a crystal’s symmetry as determined by its shape or by X-ray analysis, and that determined by monitoring the polarization state of traversing light. These discrepancies were perceived as a great impediment to the development of the sciences of crystals on the basis of Curie’s Symmetry Principle, the grand organizing idea in the physical sciences to emerge in the latter half of the 19th Century. Optically Anomalous Crystals begins with an historical introduction covering the contributions of Brewster, Biot, Mallard, Brauns, Tamman, and many other distinguished crystallographers. From this follows a tutorial in crystal optics. Further chapters discuss the two main mechanisms of optical dissymmetry: 1. the piezo-optic effect, and 2. the kinetic ordering of atoms. The text then tackles complex, inhomogeneous crystals, and...

  11. Effect of peroneal electrical stimulation versus an ankle-foot orthosis on obstacle avoidance ability in people with stroke-related foot drop.

    NARCIS (Netherlands)

    Swigchem, R. van; Duijnhoven, H.J.R. van; Boer, J. den; Geurts, A.C.H.; Weerdesteijn, V.G.M.

    2012-01-01

    BACKGROUND: Walking ability of people with foot drop in the chronic phase after stroke is better with functional electrical stimulation (FES) of the peroneal nerve than without an orthotic device. However, the literature is not conclusive on whether peroneal FES also is better than an ankle-foot

  12. Peroneal tendon dislocation/subluxation - Case series and review of the literature.

    Science.gov (United States)

    Saragas, Nikiforos Pandelis; Ferrao, Paulo Norberto Faria; Mayet, Ziyaad; Eshraghi, Hooman

    2016-06-01

    Dislocating or subluxing peroneal tendons is a relatively infrequent injury. Although infrequent it is very debilitating for the athlete. This retrospective study addresses primarily the surgical technique. Twenty-three patients between 2005 and 2014 were operated on for symptomatic dislocating or subluxing peroneal tendons. Five patients presented in the acute phase and 18 patients were late cases. Twenty patients were available for follow-up at a mean of 53.1 months. Three patients were classified as Stage III and 17 as Stage I/II. The procedures varied from pure repair of the superior peroneal retinaculum (SPR), reattachment of the SPR, groove-deepening or a combination of the above. No one procedure was favoured over the other. The choice of procedure was decided intraoperatively depending on the findings. The mean postoperative VAS score was 1.5 with a mean AOFAS score of 85. Sixteen patients rated their results as excellent, one as good, one uncertain and two poor. The results showed no one procedure superior to another with respect to chronicity, stage or satisfaction score. Several procedures have been described for this condition. Most published studies however, comprise of a small cohort of patients with good results following surgery. The surgical techniques vary and depend largely on the surgeon's clinical experience and preference. The authors conclude that the surgical technique described in this article is largely successful with a low complication rate and a high satisfaction rate. Copyright © 2015 European Foot and Ankle Society. Published by Elsevier Ltd. All rights reserved.

  13. Anomalous Hall effect

    Science.gov (United States)

    Nagaosa, Naoto; Sinova, Jairo; Onoda, Shigeki; MacDonald, A. H.; Ong, N. P.

    2010-04-01

    The anomalous Hall effect (AHE) occurs in solids with broken time-reversal symmetry, typically in a ferromagnetic phase, as a consequence of spin-orbit coupling. Experimental and theoretical studies of the AHE are reviewed, focusing on recent developments that have provided a more complete framework for understanding this subtle phenomenon and have, in many instances, replaced controversy by clarity. Synergy between experimental and theoretical works, both playing a crucial role, has been at the heart of these advances. On the theoretical front, the adoption of the Berry-phase concepts has established a link between the AHE and the topological nature of the Hall currents. On the experimental front, new experimental studies of the AHE in transition metals, transition-metal oxides, spinels, pyrochlores, and metallic dilute magnetic semiconductors have established systematic trends. These two developments, in concert with first-principles electronic structure calculations, strongly favor the dominance of an intrinsic Berry-phase-related AHE mechanism in metallic ferromagnets with moderate conductivity. The intrinsic AHE can be expressed in terms of the Berry-phase curvatures and it is therefore an intrinsic quantum-mechanical property of a perfect crystal. An extrinsic mechanism, skew scattering from disorder, tends to dominate the AHE in highly conductive ferromagnets. The full modern semiclassical treatment of the AHE is reviewed which incorporates an anomalous contribution to wave-packet group velocity due to momentum-space Berry curvatures and correctly combines the roles of intrinsic and extrinsic (skew-scattering and side-jump) scattering-related mechanisms. In addition, more rigorous quantum-mechanical treatments based on the Kubo and Keldysh formalisms are reviewed, taking into account multiband effects, and demonstrate the equivalence of all three linear response theories in the metallic regime. Building on results from recent experiment and theory, a

  14. Median and common peroneal neuropathy in coir workers of Alappuzha district, Kerala

    Directory of Open Access Journals (Sweden)

    Sadanandavalli Retnaswami Chandra

    2017-01-01

    for other causes not” contributing to the etiological diagnosis. Subjects and Methods: One hundred and forty-two upper limbs and 142 lower limbs in patients engaged in long years of coir work but having no symptoms were evaluated electrophysiologically with informed consent and financial compensation, appropriate inclusion and exclusion criteria were followed as described in the text. Results: There is electrophysiological evidence for median and common peroneal neuropathy in persons engaged in long years of coir work. Conclusions: Coir workers neuropathy appears to be a new occupational neuropathy which can be prevented by following simple preventive measures.

  15. Sequential tibial and peroneal intraneural ganglia arising from the superior tibiofibular joint

    Energy Technology Data Exchange (ETDEWEB)

    Spinner, Robert J. [Mayo Clinic, Department of Neurologic Surgery, Rochester, MN (United States); Mayo Clinic, Department of Orthopedic Surgery, Rochester, MN (United States); Mayo Clinic, Department of Anatomy, Rochester, MN (United States); Desy, Nicholas M. [Mayo Clinic, Department of Neurologic Surgery, Rochester, MN (United States); McGill University School of Medicine, Montreal, Quebec (Canada); Amrami, Kimberly K. [Mayo Clinic, Department of Radiology, Rochester, MN (United States)

    2008-01-15

    We present a patient who developed a peroneal intraneural ganglion and an adventitial cyst following the incomplete treatment of a tibial intraneural ganglion. These separate cysts all originated from the superior tibiofibular joint and dissected along their respective articular branches. A logical mechanistic explanation for these coexisting cysts is provided, which highlights the shared pathogenesis - its joint-related nature - rather than a multifocal de novo process. These observations would not only be consistent with, but would extend previous evidence in support of, the unifying articular (synovial) theory. (orig.)

  16. Dual-incision approach for repair of peroneal tendon dislocation associated with fractures of the calcaneus.

    Science.gov (United States)

    Mak, May Fong; Tay, Guan Tzu; Stern, Richard; Assal, Mathieu

    2014-02-01

    Dislocation of the peroneal tendons associated with calcaneus fractures should be repaired during fracture fixation to prevent complications. The only documented approach for repair is by proximal extension of the vertical limb of the lateral extensile approach to the calcaneus. However, enlarging the inherently fragile calcaneus flap places it at further risk of damage. Using a separate anterior incision to repair the dislocation, thus avoiding problems caused by excessive flap elevation, seemed intuitive. This approach proved technically effective and reliable in producing favorable outcomes in a series of 14 patients. Copyright 2014, SLACK Incorporated.

  17. Pseudartrose do tubérculo dos peroneais como causa de rotura parcial do longo peroneal

    OpenAIRE

    Lopes, A; Sá da Costa, D; Gonçalves, R; Campos, P; Alves da Silva, J; Afonso, P

    2015-01-01

    O tubérculo dos peroneais tem um papel reconhecido como causa de rotura ou tenossinovite dos tendões peroneais. A ocorrência de fractura isolada do tubérculo encontra-se pouco documentada na literatura. Descreve-se um caso de pseudatrose do tubérculo dos peroneais, complicado por rotura parcial do longo peroneal, de particular interesse dado não haver casos relatados de pseudartrose. Este caso reporta um homem de 40 anos, com quadro de dor persistente e limitante a nível do ...

  18. Renewal-anomalous-heterogeneous files

    International Nuclear Information System (INIS)

    Flomenbom, Ophir

    2010-01-01

    Renewal-anomalous-heterogeneous files are solved. A simple file is made of Brownian hard spheres that diffuse stochastically in an effective 1D channel. Generally, Brownian files are heterogeneous: the spheres' diffusion coefficients are distributed and the initial spheres' density is non-uniform. In renewal-anomalous files, the distribution of waiting times for individual jumps is not exponential as in Brownian files, yet obeys: ψ α (t)∼t -1-α , 0 2 >, obeys, 2 >∼ 2 > nrml α , where 2 > nrml is the MSD in the corresponding Brownian file. This scaling is an outcome of an exact relation (derived here) connecting probability density functions of Brownian files and renewal-anomalous files. It is also shown that non-renewal-anomalous files are slower than the corresponding renewal ones.

  19. Management of superficial vein thrombosis.

    Science.gov (United States)

    Cosmi, B

    2015-07-01

    Superficial vein thrombosis (SVT) is less well studied than deep vein thrombosis (DVT), because it has been considered to be a minor, self-limiting disease that is easily diagnosed on clinical grounds and that requires only symptomatic relief. The most frequently involved sites of the superficial vein system are the lower limbs, especially the saphenous veins, mostly in relation to varicosities. Lower-limb SVT shares the same risk factors as DVT; it can propagate into the deep veins, and have a complicated course with pulmonary embolism. Clinical diagnosis may not be accurate, and ultrasonography is currently indicated for both confirmation and evaluation of SVT extension. Treatment aims are symptom relief and prevention of venous thromboembolism (VTE) in relation to the thrombotic burden. SVT of the long saphenous vein within 3 cm of the saphenofemoral junction (SFJ) is considered to be equivalent to a DVT, and thus deserving of therapeutic anticoagulation. Less severe forms of lower-limb SVT not involving the SFJ have been included in randomized clinical trials of surgery, compression hosiery, non-steroidal anti-inflammatory drugs, unfractionated heparin, and low molecular weight heparins, with inconclusive results. The largest randomized clinical trial available, on 3004 patients with lower-limb SVT not involving the SFJ, showed that fondaparinux 2.5 mg once daily for 6 weeks is more effective than placebo in reducing the risk of the composite of death from any cause and symptomatic VTE (0.9% versus 5.9%). Further studies are needed to define the optimal management strategies for SVT of the lower limbs and other sites, such as the upper limbs. © 2015 International Society on Thrombosis and Haemostasis.

  20. Anomalous magnetoresistance in amorphous metals

    International Nuclear Information System (INIS)

    Kuz'menko, V.M.; Vladychkin, A.N.; Mel'nikov, V.I.; Sudovtsev, A.I.

    1984-01-01

    The magnetoresistance of amorphous Bi, Ca, V and Yb films is investigated in fields up to 4 T at low temperatures. For all metals the magnetoresistance is positive, sharply decreases with growth of temperature and depends anomalously on the magnetic field strength. For amorphous superconductors the results agree satisfactorily with the theory of anomalous magnetoresistance in which allowance is made for scattering of electrons by the superconducting fluctuations

  1. Treatment of peroneal paralysis with transposition of vastus lateralis muscle in calves.

    Science.gov (United States)

    Kilic, E; Yayla, S; Aksoy, O; Ozaydin, I; Ermutlu, C Ş

    2014-07-19

    This study aimed to clinically evaluate the results achieved by using tendon transposition to treat postinjection peroneal paralysis in calves. The study material consisted of 23 calves in all of which the clinical history indicated the problem had occurred within 1-3 days of intramuscular injection. Each patient was administered medical treatment for three weeks. After that, a decision was made to perform tendon transposition in all the subjects because their prognosis was estimated to be poor. The owners of five of the calves did not agree to the operation, and so, medical treatment was continued. Following intrathecal anaesthesia, the vastus lateralis muscle was dissected at the insertion, and the musculus (m) extensor (ext) digitalis (dig) longus and m fibularis tertius were dissected at the origin in 18 calves. The tendon ends were joined by using the locking loop suture technique in the 18 calves. Follow-up after two to three months revealed hind limb use in all surgically treated calves, while the medically treated calves had to be slaughtered because of lameness and decubitus. The results of the present study suggest that the peroneal paralysis of calves can be successfully treated by a tendon transposition technique. British Veterinary Association.

  2. Reconstrucción tibial: transferencia sóleo-peroné ipsilateral. Tibialización peroneal Tibial reconstruction: ipsilateral soleus-fibula transfer. Fibular tibialization

    Directory of Open Access Journals (Sweden)

    E. Revelo Jiron

    2009-12-01

    Full Text Available Las transferencias óseas peroneales en forma libre o ipsilateral han sido propuestas para la reconstrucción de grandes defectos tibiales. Están también descritas varias modificaciones al respecto, siendo una de ellas la constitución de un colgajo compuesto soleo-peroné realizado como transferencia libre. En este estudio presentamos nuestra experiencia con esta variante, pero en forma ipsilateral. logrando la reconstrucción del defecto tibial por medio de la tibialización peroneal. Escogimos realizar un colgajo compuesto soleo-peroné ipsilateral a flujo anterógrado o retrogrado para la reconstrucción de una serie personal de 14 pacientes consecutivos, 13 hombre y 1 mujer, con edad media de 30 años, y con amplios defectos tibiales y de tejidos blandos causados por accidentes de transito en 12 casos, 1 por proyectil balístico y 1 por artefacto explosivo artesanal. El promedio de tamaño del defecto tibial fue de 9.4 cm. Elegimos la forma ipsilateral por no disponer de infraestructura adecuada para realizar una transferencia libre. La serie de estudio se realizó durante el periodo comprendido entre Abril de 1995 y Abril del 2005. Todos los colgajos sobrevivieron. Dos pacientes desarrollaron pseudoartrosis. El apoyo completo y la marcha en 12 pacientes, se logró en un periodo promedio de 9 meses. El seguimiento postoperatorio ha sido de 3 a 6 años. Doce pacientes se han incorporado a la vida activa. Discutimos algunos aspectos prácticos de la técnica como resultado de la experiencia quirúrgica obtenida de esta serie personal. Consideramos que el método es fiable, fácil de realizar y proporciona excelentes resultados.Fibular flaps such as in there free form or as ipsilateral transfers have been proposed for reconstruction of large tibial defects. Several modifications have been described for the use of this flap. In this study we will present our experience using the ipsilateral transfer of an osteomuscular soleous fibular flap

  3. Neurapraxia of the common peroneal nerve - A rare complication resulting from wearing a KBM prosthesis: A case report

    NARCIS (Netherlands)

    Reinders, M.F.; Geertzen, J.H.B.; Rietman, J.S.

    1996-01-01

    This clinical note describes a 47-year-old man who had a traumatic amputation of the left lower leg. Two months after wearing a Kondylen Bettung Munster (KMB) prosthesis, he developed a compression neuropathy of the common peroneal nerve of his right leg after sitting cross-legged. This troublesome

  4. Therapeutic effect of an implantable peroneal nerve stimulator in subjects with chronic stroke and footdrop: A randomized controlled trial

    NARCIS (Netherlands)

    Kottink, Anke I.R.; Kottink, A.I.R.; Hermens, Hermanus J.; Nene, A.V.; Tenniglo, Martinus Johannes Bernardus; Groothuis-Oudshoorn, Catharina Gerarda Maria; IJzerman, Maarten Joost

    Background and Purpose: Footdrop, characterized by a person's inability to raise the foot at the ankle, is a common problem in patients with stroke. A randomized controlled trial was performed to determine the therapeutic effect of using a new implantable, 2-channel peroneal nerve stimulator for 6

  5. A randomized controlled trial of an implantable 2-channel peroneal nerve stimulator on walking speed and activity in poststroke hemiplegia

    NARCIS (Netherlands)

    Kottink, A.I.R.; Kottink, Anke I.; Hermens, Hermanus J.; Nene, A.V.; Tenniglo, Martinus Johannes Bernardus; van der Aa, Hans E.; Buschman, H.P.J.; IJzerman, Maarten Joost

    Objective To determine the effect of a new implantable 2-channel peroneal nerve stimulator on walking speed and daily activities, in comparison with the usual treatment in chronic stroke survivors with a drop foot. Design Randomized controlled trial. Setting All subjects were measured 5 times in the

  6. Soleus stretch reflex inhibition in the early swing phase of gait using deep peroneal nerve stimulation in spastic stroke participants

    NARCIS (Netherlands)

    Voormolen, Marco M.; Ladouceur, Michel; Veltink, Petrus H.; Sinkjaer, Thomas

    2000-01-01

    Objectives: To investigate the feasibility of inhibiting the stretch reflex of the soleus muscle by a conditioning stimulus applied to the deep peroneal nerve in spastic stroke participants during the early swing phase of gait. - Materials and Methods: This study investigated the effect of an

  7. Incidence of Peroneal Tendinopathy After Application of a Posterior Antiglide Plate for Repair of Supination External Rotation Lateral Malleolar Fractures.

    Science.gov (United States)

    Ahn, Jungtae; Kim, Sehun; Lee, Jung-Soo; Woo, Kyungjei; Sung, Ki-Sun

    2016-01-01

    Posterior antiglide plating is widely used to treat lateral malleolar fractures caused by supination-external rotation injuries. Despite its widespread use, this technique can be associated with postoperative peroneal tendinopathy. The purpose of the present observational review was to report the incidence of peroneal tendinopathy after the use of posterior antiglide plating to treat lateral malleolar fractures caused by a supination-external rotation injury. A total of 70 patients were followed up for a minimum of 12 (mean 55, range 12 to 109) months. Bony union was obtained in all cases after a mean of 57 (range 37 to 81) days. The median number of screw holes in the plate was 4.9 (range 4 to 7), and the median number of screws used to fixate the fibula was 6.58 (range 5 to 10). The mean American Orthopaedic Foot and Ankle Society hindfoot-ankle score at the final follow-up examination was 90.8 (range 55 to 100). Clinically, 3 (4.29%) of the 70 patients had lateral or posterolateral ankle pain indicative of peroneal tendinopathy after the index surgery, without any objective evidence. Of the 70 patients, 41 (58.57%) underwent surgical removal of the fibular hardware, 2 (4.87%) because of lateral ankle discomfort. At removal, inspection of the peroneal tendon sheath and/or tendons showed no gross evidence of tendinopathy in any of the patients. We concluded that the incidence of clinically evident peroneal tendon symptoms associated with posterior antiglide plating is low (4.3%), and direct operative inspection revealed no gross evidence of tendinopathy. Copyright © 2016 American College of Foot and Ankle Surgeons. Published by Elsevier Inc. All rights reserved.

  8. Anomalous X-Ray Scattering

    Energy Technology Data Exchange (ETDEWEB)

    Wendin, G.

    1979-01-01

    The availability of tunable synchrotron radiation has made it possible systematically to perform x-ray diffraction studies in regions of anomalous scattering near absorption edges, e.g., in order to derive phase information for crystal structure determination. An overview is given of recent experimental and theoretical work and discussion of the properties of the anomalous atomic scattering factor, with emphasis on threshold resonances and damping effects. The results are applied to a discussion of the very strong anomalous dispersion recently observed near the L3 edge in a cesium complex. Also given is an overview of elements and levels where similar behavior can be expected. Finally, the influence of solid state and chemical effects on the absorption edge structure is discussed. 64 references.

  9. Anomalous x-ray scattering

    International Nuclear Information System (INIS)

    Wendin, G.

    1979-01-01

    The availability of tunable synchrotron radiation has made it possible systematically to perform x-ray diffraction studies in regions of anomalous scattering near absorption edges, e.g. in order to derive phase information for crystal structure determination. An overview is given of recent experimental and theoretical work and discuss the properties of the anomalous atomic scattering factor, with emphasis on threshold resonances and damping effects. The results are applied to a discussion of the very strong anomalous dispersion recently observed near the L 3 edge in a cesium complex. Also given is an overview of elements and levels where similar behavior can be expected. Finally, the influence of solid state and chemical effects on the absorption edge structure is discussed. 64 references

  10. Damage to the Superficial Peroneal Nerve in Operative Treatment of Fibula Fractures: Straight to the Bone? Case Report and Review of the Literature

    NARCIS (Netherlands)

    J.A. Halm (Jens); T. Schepers (Tim)

    2012-01-01

    textabstractAnkle fractures are a significant part of the lower extremity trauma seen in the emergency department. Neurologic complications of ankle fracture surgery are infrequently described but account for significant morbidity. The risk of nerve injury is increased for the Blair and Botte type B

  11. Damage to the superficial peroneal nerve in operative treatment of fibula fractures: straight to the bone? Case report and review of the literature

    NARCIS (Netherlands)

    Halm, Jens A.; Schepers, Tim

    2012-01-01

    Ankle fractures are a significant part of the lower extremity trauma seen in the emergency department. Neurologic complications of ankle fracture surgery are infrequently described but account for significant morbidity. The risk of nerve injury is increased for the Blair and Botte type B pattern of

  12. Comparison of Frey Syndrome Rates Following Superficial Parotidectomy and Partial Superficial Parotidectomy for Pleomorphic Adenoma.

    Science.gov (United States)

    Ogreden, Sahin; Ruzgar, Sedat; Alimoglu, Yalcin; Eroglu, Sinan; Taskin, Umit; Oktay, Mehmet Faruk

    2016-07-01

    Comparison of Frey syndrome rates following superficial parotidectomy and partial superficial parotidectomy for pleomorphic adenoma. Fifty patients diagnosed with pleomorphic adenoma and received surgical treatment at the Otolaryngology Department of Bagcilar Training and Research Hospital between January 2009 and October 2015 were reviewed retrospectively. The patients were specifically queried for Frey syndrome symptoms. The syndrome was investigated with Minor starch iodine test. The patients who underwent superficial parotidectomy were compared to those who underwent partial superficial parotidectomy in terms of Frey syndrome development and recurrence. In the partial superficial parotidectomy group, Frey syndrome symptoms were edema and increased sweating and burning sensation on the face in 7 patients (21.9%, P = 0.735). In the superficial parotidectomy group, 5 patients exhibited edema (27.8%), 3 exhibited increased sweating (16.7%), and 5 exhibited burning sensation (27.8%). Minor test results were positive for 7 patients in the partial superficial parotidectomy group (21.8%) and 5 patients were positive (27.8%) in the superficial parotidectomy group. No recurrence was found in either group during the 5-year follow-up. No significant difference was found between 2 groups in terms of postoperative complications and recurrence. In terms of their effect on Frey syndrome development, there is no significant difference between partial superficial parotidectomy and superficial parotidectomy.

  13. Anomalous couplings at LEP2

    International Nuclear Information System (INIS)

    Fayolle, D.

    2002-01-01

    In its second phase, LEP has allowed to study four fermion processes never observed before. Results are presented on the charged triple gauge boson couplings (TGC) from the W-pair, Single W and Single γ production. The anomalous quartic gauge couplings (QGC) are constrained using production of WWγ, νν-barγγ and Z γγ final states. Finally, limits on the neutral anomalous gauge couplings (NGC) using the Z γ and ZZ production processes are also reported. All results are consistent with the Standard Model expectations. (authors)

  14. Diffraction anomalous fine structure using X-ray anomalous dispersion

    International Nuclear Information System (INIS)

    Soejima, Yuji; Kuwajima, Shuichiro

    1998-01-01

    A use of X-ray anomalous dispersion effects for structure investigation has recently been developed by using synchrotron radiation. One of the interesting method is the observation of anomalous fine structure which arise on diffraction intensity in energy region of incident X-ray at and higher than absorption edge. The phenomenon is so called Diffraction Anomalous Fine Structure (DAFS). DAFS originates in the same physical process an that of EXAFS: namely photoelectric effect at the corresponding atom and the interaction of photoelectron waves between the atom and neighboring atoms. In contrast with EXAFS, the method is available for only the crystalline materials, but shows effective advantages of the structure investigations by a use of diffraction: one is the site selectivity and the other is space selectivity. In the present study, demonstrations of a use of X-ray anomalous dispersion effect for the superstructure determination will be given for the case of PbZrO 3 , then recent trial investigations of DAFS in particular on the superlattice reflections will be introduced. In addition, we discuss about Forbidden Reflection near Edge Diffraction (FRED) which is more recently investigated as a new method of the structure analysis. (author)

  15. Peronism, dictatorship and private universities in Argentina of the 1970s

    Directory of Open Access Journals (Sweden)

    Víctor Hugo Algañaraz Soria

    2016-07-01

    Full Text Available Drawing from the analysis of university regulations, specialized literature and mainly documentary and testimonial sources, this paper addresses the weft of the private university sector during the complex interregnum that meant the seventies years for Argentina's recent history. We´ll observe that after the re-entry of Peronism to power State in 1973, the high sustainability acquired by the sector in previous years was put in check: student conflicts, political interventions and a restrained institutional growth, were some of its distinctive features. Regarding the last military dictatorship (1976-1983, opened a contradictory stage of development for private universities. Despite the alternating of conservative catholics in educative area and privatizing slant identified as a milestone of the implemented economic model, the private sector was contracted under the most brutal subjugation of the university system as a whole. However, some catholic universities were benefited with important economic stimulus

  16. In Vivo MR Microneurography of the Tibial and Common Peroneal Nerves

    Directory of Open Access Journals (Sweden)

    Paolo F. Felisaz

    2014-01-01

    Full Text Available MR microneurography is a noninvasive technique that provides visualization of the microanatomy of peripheral nerves, otherwise available only with histopathology. The objective of this study was to present a protocol to visualize the microstructure of peripheral nerves in vivo, using a 3T MRI scanner with a clinical set of coils and sequences. The tibial and the common peroneal nerves of healthy volunteers were imaged above the medial malleolus and at the level of the fibular head, respectively. The acquired images provided details about the internal structure of peripheral nerves, with visualization of the fascicles, the interfascicular fat, the epineurium, and the perineurium. MR microneurography can be performed in a clinical setting with acceptable imaging times and can be a potentially powerful tool that complements standard MR neurography.

  17. Foot reconstruction using a free proximal peroneal artery perforator flap: Anatomical study and clinical application.

    Science.gov (United States)

    Han, Hyun Ho; Lee, Yeon Ji; Moon, Suk-Ho

    2018-02-22

    When a small, thin, and durable flap is required for coverage of the foot, the proximal peroneal artery perforator (PPAP) free flap may be a novel option. However, few clinical results and anatomical studies on the PPAP flap have been published. A total of 24 PPAP flaps used in 22 patients from January 2013 to December 2016 were analyzed. All flaps were elevated in the subfascial plane based on a single perforator from the peroneal artery between the soleus and peroneus muscles. The average harvested flap size was 18.9 cm 2 (range, 9-40 cm 2 ), pedicle length was 4.3 cm (range, 3.1-5.5 cm), and pedicle artery diameter was 1.1 mm (range, 0.8-1.5 mm). Twenty-three of the 24 PPAP flaps survived. Average time to harvest the flap was 35 minutes (range, 20-55 minutes). Perforator location (ratio by fibula length) was confirmed at the 0.32 site (standard deviation, ±0.04) from the fibular head. Percentages of septocutaneous and musculocutaneous types were 42% (10/24) and 58% (14/24), respectively, for perforator vessel course; average intramuscular course was 1.3 cm (range, 0.7-2.4 cm). Vessel graft was conducted in four cases, with an average length of 2.2 cm (range, 1.5-3.0 cm). The PPAP flap is one of the thinnest flaps available and is relatively easy to elevate. Moreover, it can be elevated in the same operative field as the foot, and primary closure is available for the donor site. Thus, the PPAP flap may be a good surgical option for soft tissue coverage of the foot. Copyright © 2018 British Association of Plastic, Reconstructive and Aesthetic Surgeons. Published by Elsevier Ltd. All rights reserved.

  18. Anomalous diffusion without scale invariance

    Energy Technology Data Exchange (ETDEWEB)

    Hanyga, A [Department of Earth Sciences, University of Bergen, Allegaten 41, N5007 Bergen (Norway)

    2007-05-25

    Asymptotic behaviour of a new class of anomalous diffusion equations for subdiffusive transport defined in terms of generalized distributed fractional-order time derivatives is considered. The effect of slowly varying factors on the scaling function of asymptotic solutions is demonstrated. The origin of slowly varying scaling factors in the CTRW models is discussed.

  19. Anomalous Medial Branch of Radial Artery: A Rare Variant

    Directory of Open Access Journals (Sweden)

    Surbhi Wadhwa

    2016-10-01

    Full Text Available Radial artery is an important consistent vessel of the upper limb. It is a useful vascular access site for coronary procedures and its reliable anatomy has resulted in an elevation of radial forearm flaps for reconstructive surgeries of head and neck. Technical failures, in both the procedures, are mainly due to anatomical variations, such as radial loops, ectopic radial arteries or tortuosity in the vessel. We present a rare and a unique anomalous medial branch of the radial artery spiraling around the flexor carpi radialis muscle in the forearm with a high rising superficial palmar branch of radial artery. Developmentally it probably is a remanent of the normal pattern of capillary vessel maintenance and regression. Such a case is of importance for reconstructive surgeons and coronary interventionists, especially in view of its unique medial and deep course.

  20. The Prevalence and Role of Low Lying Peroneus Brevis Muscle Belly in Patients with Peroneal Tendon Pathologies: A Potential Source for Tendon Subluxation

    OpenAIRE

    Mirmiran, Roya; Squire, Chad; Wassell, Daniel

    2015-01-01

    A low lying peroneus brevis muscle belly is a rare anomaly. There are few published studies that support presence of this anomaly as an etiology for peroneal tendon tear. However, the association between a low lying peroneus muscle belly (LLMB) and tendon subluxation is not well explored. In this retrospective study, the magnetic resonance imaging (MRI) and intraoperative findings of 50 consecutive patients undergoing a primary peroneal tendon surgery, in a five year period, were assessed. Th...

  1. Superficial vein thrombosis with hemorrhagic cerebral infarction

    Directory of Open Access Journals (Sweden)

    Yu-wei CONG

    2016-01-01

    Full Text Available Background Cerebral superficial vein thrombosis was rare and often misdiagnosed or missed for its various etiological factors, and complicated and nonspecific clinical manifestations. This paper reported one case of superficial vein thrombosis in right fronto-parietal lobe with hemorrhagic infarction. The anatomy of superficial vein, pathophysiological points, diagnosis and treatment of superficial vein thrombosis were reviewed to help to reduce missed diagnosis or misdiagnosis. Methods and Results A 18-year-old male patient had suffered from progressive headache for 4 years and weakness of left limbs for 2 d. Head MRI showed circular space-occupying lesion in right fronto-parietal lobe. Magnetic resonance venography (MRV examination showed the front two-thirds of the superior sagittal sinus was not clear. The lesions were removed and decompressive craniectomy was conducted, showing the brain tissue was pale, partly yellow or dark red, and superficial venous engorgement. Histological observation showed pial superficial vein thrombosis and subpial encephalomalacia, and multifocal hemorrhage of cerebral cortex and local parenchymal hemorrhage. A large number of "grid cells" and vascular "cuff" phenomenan were visible in surrounding tissue, and the parenchymal blood vessel proliferation was obvious. Left hand activity of the patient was obviously limited after the operation. Conclusions Clinical diagnosis of superficial vein thrombosis with hemorrhagic infarction is difficult, and brain imaging and serological examination can provide certain help. Much attention should be paid to the multidisciplinary diagnosis and treatment to reduce misdiagnosis or missed diagnosis, and gather clinical experience. DOI: 10.3969/j.issn.1672-6731.2016.01.007

  2. Clinical and neurophysiological study of peroneal nerve mononeuropathy after substantial weight loss in patients suffering from major depressive and schizophrenic disorder: Suggestions on patients' management

    Directory of Open Access Journals (Sweden)

    Koulouris George C

    2008-11-01

    Full Text Available Abstract Background Peroneal nerve is susceptible to injuries due to its anatomical course. Excessive weight loss, which reduces the fatty cushion protecting the nerve, is considered a common underlying cause of peroneal palsy. Other predisposing factors, such as prolonged postures, traumas of the region or concomitant pathologies (for example diabetes mellitus contribute to the nerve damage. This study aims to reveal the multiple predisposing factors of peroneal nerve mononeuropathy after substantial weight loss that coexist in psychiatric patients and to make suggestions on their management. Methods Nine psychiatric inpatients, major depressive or schizophrenic, with foot drop underwent a complete clinical neurological and neurophysiological examination. All had excessive weight loss, which was completed in a short period of time and had not resulted from a well-balanced low-calorie diet, but was due to their psychiatric illness. Data regarding predisposing factors to peroneal nerve mononeuropathy were gathered, such as habitual leg crossing, squatting or other prolonged postures. Results The clinical examination and the neurophysiological evaluation in all patients were indicative of a focal lesion of the peroneal nerve at the fibular head. Conclusion Patients with major depressive and schizophrenic disorders gather multiple predisposing factors to peroneal palsy, adequate to classify them at a high risk group. The better focus of the attendant medical and nursing staff on this condition, the early clinical and neurophysiologic evaluation and surgical interventions may enable an improved management and prognosis of these patients.

  3. Two Cases of Elderly-Onset Hereditary Neuropathy with Liability to Pressure Palsy Manifesting Bilateral Peroneal Nerve Palsies

    Directory of Open Access Journals (Sweden)

    Norihiko Kawaguchi

    2012-10-01

    Full Text Available Hereditary neuropathy with liability to pressure palsy (HNPP is characterized by recurrent focal neuropathies, which usually become symptomatic in the second or third decade of life. However, clinical phenotypic heterogeneity among patients with HNPP has recently been reported. Certain patients show polyneuropathy-type diffuse nerve injuries, whereas others remain asymptomatic at older ages. We present two cases of elderly-onset bilateral peroneal nerve palsies with diffuse muscle weakness in the lower limbs and glove-and-stocking type sensory disturbance. Both patients were diagnosed with HNPP by genetic analyses that detected deletions of chromosome 17p11.2 in peripheral myelin protein 22 genes. Their clinical courses suggested that the Japanese sitting style termed ‘seiza’, a way of sitting on the floor with the lower legs crossed under the thighs, was a precipitating factor for the bilateral peroneal nerve palsies.

  4. Pseudoaneurysm of the anterior superficial temporal artery.

    Science.gov (United States)

    Han, K; Borah, G L

    1996-12-01

    Pseudoaneurysm of the superficial temporal artery must be considered in the differential diagnosis of masses of the lateral forehead and temporal fossa. While the first reported case of a temporal artery aneurysm was reported by Thomas Bartholin in 1740, there is scant mention of this lesion in the plastic and maxillofacial surgical literature. Pseudoaneurysms can arise in the forehead and scalp as a result of blunt traumatic impingement of the superficial temporal artery against the calvarium. The anterior branch of the artery is most vulnerable, because in the lateral forehead it courses over the frontal osseous ridge in the galea aponeurotica formed by the fusion line of the deep and superficial temporalis muscle fascia. This dense fascial investment has a tethering effect in the gap between the temporalis and frontalis muscles and prevents the artery from displacing laterally in response to traumatic forces. A history of recent blunt trauma or surgery to the forehead, combined with a pulsatile bruit, should direct the physician to the diagnosis of pseudoaneurysm of the superficial temporal artery. Treatment is surgical resection of the involved segment without the need for reconstruction. This report includes a review of the literature and presents the first documented case of a bicycle helmet as the cause of a superficial temporal artery pseudoaneurysm.

  5. Magnetic effects in anomalous dispersion

    International Nuclear Information System (INIS)

    Blume, M.

    1992-01-01

    Spectacular enhancements of magnetic x-ray scattering have been predicted and observed experimentally. These effects are the result of resonant phenomena closely related to anomalous dispersion, and they are strongest at near-edge resonances. The theory of these resonances will be developed with particular attention to the symmetry properties of the scatterer. While the phenomena to be discussed concern magnetic properties the transitions are electric dipole or electric quadrupole in character and represent a subset of the usual anomalous dispersion phenomena. The polarization dependence of the scattering is also considered, and the polarization dependence for magnetic effects is related to that for charge scattering and to Templeton type anisotropic polarization phenomena. It has been found that the strongest effects occur in rare-earths and in actinides for M shell edges. In addition to the scattering properties the theory is applicable to ''forward scattering'' properties such as the Faraday effect and circular dichroism

  6. Ankle syndesmotic fixation using two screws: risk of injury to the perforating branch of the peroneal artery.

    Science.gov (United States)

    Penera, Keith; Manji, Karim; Wedel, Mathew; Shofler, David; Labovitz, Jonathan

    2014-01-01

    Trans-syndesmotic screws are commonly used to repair syndesmosis ruptures and stabilize the ankle joint. Just as with any surgery, the neurovascular structures can be compromised, causing complications. We evaluated the position of the perforating branch of the peroneal artery to define the risk of arterial compromise during placement of 2 trans-syndesmotic screws. In 37 cadaveric specimens, 2 trans-syndesmotic screws were inserted 2 and 4 cm proximal to the ankle joint. The distances between the perforating branch of the peroneal artery and the screws and the other anatomic landmarks were measured. Significant differences were calculated between the male and female limbs, and regression analysis was used to determine the significant associations between the tibial length and screw location. The perforating branch of the peroneal artery passed through the interosseous membrane 3.42 ± 0.6 cm proximal to the tibial plafond. The artery was located up to 4 mm from the superior and inferior screws 51.4% and 10.8% of the time, respectively. A greater percentage of male specimens displayed close proximity between the artery and the superior screw, and the distance of the artery from the distal fibula was statistically significant compared with the distance in the female specimens. Regression analysis revealed that the greater the tibial length, the closer the superior screw was to the artery, with a negative correlation discovered for the inferior screw. We concluded that superior screw placement increased the risk of injuring the perforating branch of the peroneal artery injury, and the likelihood of injuring the artery with the inferior screw increased as the length of the tibia decreased. Copyright © 2014 American College of Foot and Ankle Surgeons. Published by Elsevier Inc. All rights reserved.

  7. Colligative properties of anomalous water.

    Science.gov (United States)

    Everett, D H; Haynes, J M; McElroy, P J

    1970-06-13

    Investigations of the phase behaviour on freezing and subsequent melting and of other properties indicate that anomalous water is a solution containing a fixed amount of relatively involatile material in normal water. There seems to be no need to postulate the existence of a new polymer of water in such solutions. If only water and silica are present, the properties are consistent with those of a silicic acid gel.

  8. Horizon universality and anomalous conductivities

    Energy Technology Data Exchange (ETDEWEB)

    Gürsoy, Umut [Institute for Theoretical Physics and Spinoza Institute, Utrecht University,3508 TD Utrecht (Netherlands); Tarrío, Javier [Departament de Física Fonamental and Institut de Ciències del Cosmos,Universitat de Barcelona, Martí i Franquès 1, ES-08028, Barcelona (Spain)

    2015-10-08

    We show that the value of chiral conductivities associated with anomalous transport is universal in a general class of strongly coupled quantum field theories that admit a gravitational holographic dual in the large N limit. Our result only applies to theories in the presence of external gauge fields with no dynamical gluon fields. On the gravity side the result follows from near horizon universality of the fluctuation equations, similar to the holographic calculation of the shear viscosity.

  9. Peroneal electromechanical delay and fatigue in patients with chronic ankle instability.

    Science.gov (United States)

    Flevas, Dimitrios A; Bernard, Manfred; Ristanis, Stavros; Moraiti, Constantina; Georgoulis, Anastasios D; Pappas, Evangelos

    2017-06-01

    The purpose of this study was to investigate the effect of chronic ankle instability (CAI) on electromechanical delay times (EMD) before and after fatigue. Understanding the mechanisms that contribute to CAI is essential for the development of effective rehabilitation programmes. It was hypothesized that patients with CAI will demonstrate prolonged EMD times compared to healthy subjects and that fatigue will cause greater increases in EMD times in the CAI group. Twenty-one male volunteers participated in the study providing data on 16 ankles with CAI and 26 with no history of ankle injury. EMD was measured on an isokinetic dynamometer. Measurements were taken with the ankle in neutral (0°) and at 30° of inversion. All subjects followed an isokinetic fatigue protocol until eversion torque fell below 50 % of initial torque for three consecutive repetitions. A 2 × 2 × 2 ANOVA was used to calculate the effect of ankle status (CAI vs. healthy), fatigue, angle (0° vs. 30°) and their interactions on EMD. Fatigue caused a significant increase on EMD [non-fatigued: 122(29)ms vs. fatigue 155(54)ms; p ankle status and angle was found (p = 0.026) with CAI ankles demonstrating longer EMD [CAI: 156(45)ms vs. healthy: 133(40)ms] in neutral but not at 30° of inversion [CAI: 133(46)ms vs. 132(33)ms]. Patients with CAI had longer EMD times in neutral, but not when the ankle was placed in inversion. This suggests that rehabilitation programmes may be more effective when retraining occurs with the ankle in neutral position. It is likely that low EMD times prevent ankle acceleration at the beginning of the mechanism of injury, but they are less important when the ankle has already inverted at 30°. Both CAI and healthy subjects demonstrated longer EMD after fatigue, emphasizing the importance of proper conditioning in the prevention of delayed peroneal response and subsequent ankle injury. Improving resistance to fatigue of the peroneals may prove to be an effective

  10. The accessory peroneal (fibular) muscles: peroneus quartus and peroneus digiti quinti. A systematic review and meta-analysis.

    Science.gov (United States)

    Yammine, Kaissar

    2015-08-01

    The denomination of "accessory peroneal muscle" (APM) refers usually to two muscles: the peroneus quartus (PQua) and the peroneus digit quinti (PQui) which were believed to be variants of a same muscle. Their morphology and prevalence show high variation in relevant literature mainly owing to the diverse terminology used to describe this muscle group. The aim of this meta-analysis is to generate more accurate description and frequency of those muscles. A total of 46 studies (3,928 legs/ankles) met the inclusion criteria. The aggregate results were: (a) a true APM prevalence of 16 % with 10.2 % for PQua vs. 34.3 % for PQui; (b) a crude prevalence of 16.6 % for PQua vs. 21.5 % for PQui; (c) a bilateral prevalence of 1.73 % for PQua vs. 12.5 % for PQui; (d) the PQua was significantly more prevalent in Indian populations compared to all other ancestries, and the PQui is significantly more prevalent in Europeans and Americans compared to Japanese and Korean populations; (e) though a tendency for higher frequency was found in males and on the right specimens, no significance was found for gender and side; for (f) the "surgical" occurrence of PQua in studies dealing with peroneal tendon surgery was 5.5 % where peroneal tendon pathology seems to be not associated with the presence of an APM; (g) the MRI prevalence of APM was 10.6 %; (h) APMs took origin from peroneus brevis in 60 %, from the distal fibula in 36 % and from other structures in 4 %; (i) APMs took insertion on retrotroclear eminence of the calcaneum in 53.4 %, on peroneal trochlea in 6.6 %, merged with a peroneal tendon in 9.3 %, and inserted on the extensor apparatus of the 5th toe in 18.4 %. Despite the acknowledged limitation owing to the varied terminology used to describe this accessory muscle group, the significant differences found between the aggregate frequency estimates of each muscle do not support the hypothesis that both muscles are variants of a same structure.

  11. HIGH ORIGIN OF SUPERFICIAL ULNAR ARTERY- A CASE REPORT

    Directory of Open Access Journals (Sweden)

    Anjana Jayakumaran Nair

    2017-03-01

    Full Text Available BACKGROUND High origin and superficially placed ulnar artery is a rare anatomical variant that usually arises either in the axilla or arm and runs a superficial course in the forearm, enters the hand and participates in the formation of superficial palmar arch. During routine dissection of cadavers in our department, we observed a unilateral case of high origin and superficial ulnar artery in a human male cadaver. It originated from the brachial artery in the lower third of arm 4 cm above its bifurcation. From its origin, it passed downwards along the medial aspect of forearm, superficial to the flexors, entered hand superficial to the flexor retinaculum and formed superficial palmar arch. The knowledge of existence of a superficial ulnar artery is important during vascular and reconstructive surgery and also in evaluation of angiographic images. Superficial position makes it more vulnerable to trauma and more accessible to cannulation.

  12. Foot Drop: Looking Beyond Common Peroneal Nerve Palsy – A Neurophysiology Centre Experience

    LENUS (Irish Health Repository)

    Yap, SM

    2016-04-01

    Foot drop is a complex symptom with a considerable range in aetiology, severity and prognosis. We aim to characterise the aetiologies of foot drop and assess the diagnostic contribution of neurophysiologic testing (NCS\\/EMG). Retrospective review of consecutive referrals of foot drop to the Neurophysiology Department in Cork University Hospital was performed over a two year period (January 2012 to December 2013). Of a total of 59 referrals, common peroneal nerve (CPN) palsy comprised only slightly more than half of cases; 3(5%) have central origin; 3(5%) have motor neuron disease. Six (10%) have diabetes; 7(12%) have cancer; 5(8%) were bilateral. NCS\\/EMG altered initial working diagnosis in 14 out of 52 (27%) cases whereby initial diagnosis was provided. However one-third of all cases revealed additional coexistent pathology in an anatomic location remote to that of the primary diagnosis. Foot drop with central and proximal localisations are important and under recognised. NCS\\/EMG is valuable and also reveals additional pathology which warrants investigation

  13. Microsurgical Resection of a Common Peroneal Nerve Schwannoma: A 3-Dimensional Operative Video.

    Science.gov (United States)

    Budohoski, Karol P; Guilfoyle, Mathew R; Kenyon, Olivia; Barone, Damiano G; Santarius, Thomas; Trivedi, Rikin A

    2018-01-01

    Peripheral nerve sheath tumors are benign entities that manifest with pain or neurological deficits from mass effect. Treatment is mostly surgical, however, the aggressiveness of treatment needs to be carefully considered with respect to preserving function. We present a case of a 62-year-old male with a 2-year history of left lower extremity pain radiating toward the dorsolateral foot. There was a tender and palpable mass in the lateral popliteal fossa with imaging consistent with Schwannoma of the common peroneal nerve. The patient was counseled for surgery and informed consent was obtained. Microsurgical resection was undertaken and gross total resection was achieved without compromise of function. We demonstrate the placement of neurophysiological monitoring electrodes in all 3 compartment of the calf as well as the use of stimulation to identify a nonfunctioning area for entering the nerve sheath. Anatomy of the popliteal fossa and microsurgical technique for resection of nerve sheath tumors are discussed. When dealing with these pathologies, it is important to use intraoperative neurophysiology as well as careful technique in order to achieve maximal resection without compromising neurological function. Copyright © 2017 by the Congress of Neurological Surgeons.

  14. Superficial melanomas of oral mucous membranes.

    Science.gov (United States)

    Regezi, J A; Hayward, J R; Pickens, T N

    1978-05-01

    In accordance with microscopic and clinical criteria established for superficial melanomas of the skin (superficial spreading melanoma, lentigo maligna melanoma, acral-lentiginous melanoma), three oral lesions have been evaluated. The literature on oral melanomas has also been reviewed, with special attention given to those cases that had pre-existing melanosis. One patient with a diagnosis of superficial spreading melanoma eventually died of his untreated lesion 11 years after its first appearance. Two patients had lesions diagnosed as acral-lentiginous melanoma (a group which also includes volar and subungual melanomas) that exhibited aggressive, recurrent behavior. These lesions had microsocpic features similar to lentigo maligna melanoma but did not behave in a manner consistent with that diagnosis. Electron microscopic study of one acral-lentiginous melanoma demonstrated malenosomes and premelanosomes that were like those seen in normal melanocytes and nevus cells. The superficial or radial growth phase of many oral melanomas has apparently gone unrecognized. Melanosis has been reported to be a common feature of invasive oral melanomas but has not generally been related to the natural history of these lesions. Oral lesions with a prolonged intra-epithelial or radial growth phase would be expected to have a better prognosis than nodular melanomas, but meaningful survival data are not available because of the infrequency with which oral melanomas have been subclassified.

  15. Superficial siderosis of the central nervous system

    African Journals Online (AJOL)

    The term superficial siderosis is used to describe the haemosiderin deposition on the surface of the brain, spinal cord, brainstem and cranial nerve leptomeninges following recurrent subarachnoid haemorrhage. The concern is the cytotoxic nature of the haemosiderin on the under- lying tissue causing slow but progressive ...

  16. Intravesical Gemcitabine for Treatment of Superficial Bladder ...

    African Journals Online (AJOL)

    Objectives: Intravesical Bacillus Calmette-Guérin (BCG) vaccine is the mainstay of treatment and prophylaxis in superficial bladder cancer (SBC) as it reduces tumor recurrence and disease progression. About one-third of patients do not respond to BCG. The aim of this study was to determine the efficacy of intravesical ...

  17. [Superficial venous thrombosis. A state of art].

    Science.gov (United States)

    Sándor, Tamás

    2017-01-01

    For a long time superficial thrombophlebitis has been thought to be a rather benign condition. Recently, when duplex ultrasound technique is used for the diagnosis more and more often, the disease is proved to be more dangerous than anticipated. Thrombosis propagates to the deep veins in 6-44% and pulmonary embolism was observed on the patients in 1,5-33%. We can calculate venous thromboembolic complications on every fourth patient. Diagnosis is clinical, but duplex ultrasound examination is mandatory, for estimation of the thrombus extent, for exclusion of the deep venous thrombosis and for follow up. Both legs should be checked with ultrasound, because simultaneous deep venous thrombosis can develop on the contralateral limb. Two different forms can be distinguished: superficial venous thrombosis with, or without varicose veins. In cases of spontaneous, non varicous form, especially when the process is migrating or recurrent, a careful clinical examination is necessery for exclusion of malignant diseases and thrombophilia. The treatment options are summarised on the basis of recent international consensus statements. The American and German guidelines are similar. Compression and mobilisation are cornerstones of the therapy. For a short segment thrombosis non steroidal antiinflammatory drugs are effective. For longer segments low molecular-weight heparins are preferred. Information on the effect of the novel oral anticoagulants for the therapy is lacking but they may appear to be effective in the future for this indication. When thrombus is close to the sapheno-femoral or sapheno-popliteal junction crossectomy (high ligation), or low molecular-weight heparin in therapeutic doses are indicated. The term superficial thrombophlebitis should be discouraged, because inflammation and infection is not the primary pathology. It should be called correctly superficial venous thrombosis in order to avoid the unnecessary administration of antibiotics and the misconception

  18. Anomalous Hall effect in polycrystalline Ni films

    KAUST Repository

    Guo, Zaibing

    2012-02-01

    We systematically studied the anomalous Hall effect in a series of polycrystalline Ni films with thickness ranging from 4 to 200 nm. It is found that both the longitudinal and anomalous Hall resistivity increased greatly as film thickness decreased. This enhancement should be related to the surface scattering. In the ultrathin films (46 nm thick), weak localization corrections to anomalous Hall conductivity were studied. The granular model, taking into account the dominated intergranular tunneling, has been employed to explain this phenomenon, which can explain the weak dependence of anomalous Hall resistivity on longitudinal resistivity as well. © 2011 Elsevier Ltd. All rights reserved.

  19. Anomalous gauge theories as constrained Hamiltonian systems

    International Nuclear Information System (INIS)

    Fujiwara, T.

    1989-01-01

    Anomalous gauge theories considered as constrained systems are investigated. The effects of chiral anomaly on the canonical structure are examined first for nonlinear σ-model and later for fermionic theory. The breakdown of the Gauss law constraints and the anomalous commutators among them are studied in a systematic way. An intrinsic mass term for gauge fields makes it possible to solve the Gauss law relations as second class constraints. Dirac brackets between the time components of gauge fields are shown to involve anomalous terms. Based upon the Ward-Takahashi identities for gauge symmetry, we investigate anomalous fermionic theory within the framework of path integral approach. (orig.)

  20. Kinetic studies of anomalous transport

    International Nuclear Information System (INIS)

    Tang, W.M.

    1990-11-01

    Progress in achieving a physics-based understanding of anomalous transport in toroidal systems has come in large part from investigations based on the proposition that low frequency electrostatic microinstabilities are dominant in the bulk (''confinement'') region of these plasmas. Although the presence here of drift-type modes dependent on trapped particle and ion temperature gradient driven effects appears to be consistent with a number of important observed confinement trends, conventional estimates for these instabilities cannot account for the strong current (I p ) and /or q-scaling frequently found in empirically deduced global energy confinement times for auxiliary-heated discharges. The present paper deals with both linear and nonlinear physics features, ignored in simpler estimates, which could introduce an appreciable local dependence on current. It is also pointed out that while the thermal flux characteristics of drift modes have justifiably been the focus of experimental studies assessing their relevance, other transport properties associated with these microinstabilities should additionally be examined. Accordingly, the present paper provides estimates and discusses the significance of anomalous energy exchange between ions and electrons when fluctuations are present. 19 refs., 3 figs

  1. Anomalous transport in toroidal plasmas

    International Nuclear Information System (INIS)

    Punjabi, A.

    1989-12-01

    When the magnetic moment of particle is conserved, there are three mechanisms which cause anomalous transport. These are: variation of magnetic field strength in flux surface, variation of electrostatic potential in flux surface, and destruction of flux surface. The anomalous transport of different groups of particles resulting from each of these mechanisms is different. This fact can be exploited to determine the cause of transport operative in an experimental situation. This approach can give far more information on the transport than the standard confinement time measurements. To implement this approach, we have developed Monte Carlo codes for toroidal geometries. The equations of motion are developed in a set of non-canonical, practical Boozer co-ordinates by means of Jacobian transformations of the particle drift Hamiltonian equations of motion. Effects of collisions are included by appropriate stochastic changes in the constants of motion. Effects of the loop voltage on particle motions are also included. We plan to apply our method to study two problems: the problem of the hot electron tail observed in edge region of ZT-40, and the energy confinement time in TOKAPOLE II. For the ZT-40 problem three situations will be considered: a single mode in the core, a stochastic region that covers half the minor radius, a stochastic region that covers the entire plasma. A turbulent spectrum of perturbations based on the experimental data of TOKAPOLE II will be developed. This will be used to simulate electron transport resulting from ideal instabilities and resistive instabilities in TOKAPOLE II

  2. Computed Tomography Assessment of Peroneal Tendon Displacement and Posteromedial Structure Entrapment in Pilon Fractures.

    Science.gov (United States)

    Fokin, Alex; Huntley, Samuel R; Summers, Spencer H; Lawrie, Charles M; Miranda, Alejandro D; Caban-Martinez, Alberto J; Steinlauf, Steven D

    2016-11-01

    To determine the proportion of (1) peroneal tendon displacement (PTD) and posteromedial structure entrapment (PMSE) cases in a sample of pilon fractures, (2) missed diagnoses of PTD and PMSE on computed tomography (CT) by radiologists and attending orthopaedic trauma surgeons, and PTD and PMSE cases by (3) OTA/AO classification, and (4) fibular fracture. Retrospective cohort review. Regional level 1 Trauma Center. Two hundred patients treated between July 2008 and November 2014. Axial and reconstructed CT images were used in bone and soft tissue windows to identify PTD and PMSE. Medical charts were reviewed to identify OTA/AO fracture classification, the presence of concomitant fibular fracture, whether radiologist CT interpretation noted PTD or PMSE, and whether attending orthopaedic trauma surgeons' operative notes mentioned recognition of and management of PTD or PMSE. From the retrospective review of CT, PTD was identified in 11.0% and PMSE in 19.0% of all pilon fractures. Of the 22 patients with PTD, 59.1% sustained a concomitant fibular fracture and 90.9% sustained a 43-C fracture. Patients with PTD sustained more 43-C fractures (90.9% vs. 62.9%) but significantly fewer fibular fractures (59.1% vs. 80.3%; P = 0.023) than patients without PTD. Of the 38 patients with PMSE, 81.6% sustained a fibular fracture and 86.8% sustained a 43-C fracture. PMSE was more common in patients with 43-C fractures (86.8% vs. 61.1%). The final preoperative radiologist CT interpretation commented on PTD and PMSE in 50.0% of cases. Higher energy pilon fractures (43-C) are associated with higher incidence of PMSE and PTD. Concomitant fibula fracture may play a protective role in PTD in the setting of pilon fractures. Both attending radiologists and attending orthopaedic trauma surgeons frequently fail to recognize the diagnoses of PTD and PMSE. Prognostic level III. See Instructions for Authors for a complete description of levels of evidence.

  3. Randomized Controlled Trial of Surface Peroneal Nerve Stimulation for Motor Relearning in Lower Limb Hemiparesis

    Science.gov (United States)

    Taylor, Paul N.; Gunzler, Douglas D.; Buurke, Jaap H.; IJzerman, Maarten J.; Chae, John

    2013-01-01

    Objective To compare the motor relearning effect of a surface peroneal nerve stimulator (PNS) versus usual care on lower limb motor impairment, activity limitation, and quality of life among chronic stroke survivors. Design Single-blinded randomized controlled trial Setting Teaching hospital of academic medical center Participants 110 chronic stroke survivors (> 12-wks post-stroke) with unilateral hemiparesis and dorsiflexion strength of ≤ 4/5 on the Medical Research Council scale Interventions Subjects were stratified by motor impairment level and then randomized to ambulation training with either a surface PNS device or usual care (ankle foot orthosis or no device) intervention. Subjects were treated for 12-wks and followed for 6-months post-treatment. Main Outcome Measures Lower limb portion of the Fugl-Meyer (FM) Assessment (motor impairment), the Modified Emory Functional Ambulation Profile (mEFAP) performed without a device (functional ambulation), and the Stroke Specific Quality of Life (SSQOL) scale. Results There was no significant treatment group main effect or treatment group by time interaction effect on FM, mEFAP, or SSQOL raw scores (p>0.05). The time effect was significant for the three raw scores (p<0.05). However, when comparing average change scores from baseline (T1) to end of treatment, (T2, 12-wks), and at 12-wks (T3) and 24-wks (T4) after end of treatment, significant differences were noted only for the mEFAP and SSQOL scores. The change in the average scores for both mEFAP and SSQOL occurred between T1 and T2, followed by relative stability thereafter. Conclusions There was no evidence of a motor relearning effect on lower limb motor impairment in either the PNS or usual care groups. However, both PNS and usual care groups demonstrated significant improvements in functional mobility and quality of life during the treatment period, which were maintained at 6-months follow-up. PMID:23399456

  4. Malignant transformation of superficial peritoneal endometriosis lesion.

    Science.gov (United States)

    Marchand, Eva; Hequet, Delphine; Thoury, Anne; Barranger, Emmanuel

    2013-08-26

    A 63-year-old woman with no medical history underwent an abdominal surgery with hysterectomy and bilateral salpingo-oophorectomy for a 10 cm peritoneal cyst with increased cancer antigene-125. A large suspicious tumour of the Douglas space, with contact to the uterus and the rectal wall was described. The rest of the exploration was normal, specially the rest of the peritoneum. Histopathology revealed a malignant transformation of a superficial peritoneal endometriosis. Secondary surgery was thus completed by laparoscopy with bilateral pelvic and para-aortic lymph node dissections, omentectomy and multiple peritoneal biopsies. All staging samples were free of cancer; therefore no complementary therapy was administered. After 18 months of follow-up, consisting of clinical examination and pelvis magnetic resonance imaging every 6 months, we did not observe any recurrence. Malignant transformation of superficial peritoneal endometriosis is a rare disease and surgical management seems to be the main treatment.

  5. Treatment of nocturnal leg cramps by blockade of the medial branch of the deep peroneal nerve after lumbar spine surgery

    Science.gov (United States)

    Imura, Takayuki; Inoue, Gen; Nakazawa, Toshiyuki; Miyagi, Masayuki; Saito, Wataru; Uchida, Kentaro; Namba, Takanori; Shirasawa, Eiki; Takahira, Naonobu; Takaso, Masashi

    2015-01-01

    Introduction Patients with lumbar spine disease sometimes complain of nocturnal leg cramps. We sought to investigate the effectiveness of blocking the medial branch of the deep peroneal nerve as treatment for nocturnal leg cramps after spinal surgery for lumbar spine disease. Methods We evaluated 66 postoperative patients in this prospective comparative study of a group of patients with a nerve block (n = 41) and a control group without (n = 25). In the block group, the medial branch of the deep peroneal nerve was blocked at the distal two-thirds of the interspace between the first and second metatarsals using 5.0 mL of 1.0% lidocaine. Results Two weeks after the block, the frequency of nocturnal leg cramps was reduced to less than a quarter of pretreatment baseline frequency in 61.0% of patients (n = 25) and less than half in 80.5% (n = 33). In the control group, the frequency of the leg cramps was reduced from baseline in 32.0% of patients (n = 8), and was unchanged or increased in 68.0% (n = 17) at 2 weeks. Cramp frequency was reduced to less than a quarter or less than half of baseline frequency in a significantly (P cramp was less in about two-thirds of patients (63.4%; n = 26) in the block group and was unchanged in one-third (31.7%; n = 13). Conclusions Blocking the medial branch of the peroneal nerve can be an effective, long-lasting, and simple treatment with low risk for nocturnal cramps sustained after lumbar spine surgery. PMID:26445706

  6. Clinico Mycological Study of Superficial Mycoses

    Directory of Open Access Journals (Sweden)

    Rachana J. Magdum

    2016-10-01

    Full Text Available Background: Generally it is well established fact that geographical distribution of the fungi may change from time to time; hence this study was planned. Aim and Objectives: To analyze the prevalence of superficial mycoses, its clinical presentation and species identification of the fungal isolates responsible for the disease. Material and Methods: A total 125 clinically diagnosed cases of superficial mycoses visiting Dermatology and Venereology outpatient department of Bharati Hospital, Sangli, for a period of one year were included in the study. Specimens like skin scrapping, nail clipping, hair were collected and subjected to KOH mount and culture. Identification of species was done by macroscopic examination of culture, tease mount and other physiological tests including Urease test, Hair perforation tests and Germ tube test. Results: Superficial mycosis was more common in the age group of 21-30 years (28% and in males (60.8%. The infection was more common in students (29.6%. Tinea corporis (42.4% was the commonest clinical type followed by tinea cruris (22.4%. 61.6% cases were positive by direct microscopy and 60.8% cases showed culture positive. Out of 125 samples, dermatophytes were grown in 63 cases (82.89% followed by non dermatophytic moulds in 10 cases (13.16% and Candida albicans in 3 cases (3.95%. The most common isolate among dermtophytosis was T. rubrum (46.05% followed by T. mentagrophyte (25%. Conclusion: It was concluded that along with dermatophytes, non dermatophytic moulds are also important to cause of superficial mycoses

  7. Volumetric and superficial characterization of carbon activated

    International Nuclear Information System (INIS)

    Carrera G, L.M.; Garcia S, I.; Jimenez B, J.; Solache R, M.; Lopez M, B.; Bulbulian G, S.; Olguin G, M.T.

    2000-01-01

    The activated carbon is the resultant material of the calcination process of natural carbonated materials as coconut shells or olive little bones. It is an excellent adsorbent of diluted substances, so much in colloidal form, as in particles form. Those substances are attracted and retained by the carbon surface. In this work is make the volumetric and superficial characterization of activated carbon treated thermically (300 Centigrade) in function of the grain size average. (Author)

  8. Anomalous osmosis resulting from preferential absorption

    NARCIS (Netherlands)

    Staverman, A.J.; Kruissink, C.A.; Pals, D.T.F.

    1965-01-01

    An explanation of the anomalous osmosis described in the preceding paper is given in terms of friction coefficients in the glass membrane. It is shown that anomalous osmosis may be expected when the friction coefficients are constant and positive provided that the membrane absorbs solute strongly

  9. Impact of angiosome- and nonangiosome-targeted peroneal bypass on limb salvage and healing in patients with chronic limb-threatening ischemia.

    Science.gov (United States)

    Ricco, Jean-Baptiste; Gargiulo, Mauro; Stella, Andrea; Abualhin, Mohammad; Gallitto, Enrico; Desvergnes, Mathieu; Belmonte, Romain; Schneider, Fabrice

    2017-11-01

    Direct (DIR) or indirect (IND) revascularization of pedal angiosomes in patients with chronic limb-threatening ischemia (CLTI) has an unclear impact on limb salvage and healing. The aim of this study was to evaluate the outcomes of DIR and IND revascularization in patients with a peroneal bypass and tissue loss. We conducted a retrospective study of a prospectively maintained database in two European university centers from 2004 to 2015. We extracted from this database all patients with CLTI and tissue loss who had received a bypass to the peroneal artery. All patients underwent angiography before bypass. Revascularization was considered DIR if the wound was in a peroneal angiosome. Wounds, ischemia, and infection were categorized according to the Wound, Ischemia, and foot Infection (WIfI) classification. Limb salvage and amputation-free survival were calculated using the Kaplan-Meier method. Cox regression was used to compare the role of patient characteristics, including diabetes, peroneal runoff, pedal arch angiosome, WIfI grade, chronic kidney disease, and diabetes, in amputation-free-survival. From January 2004 through October 2015, there were 120 peroneal bypasses performed in 120 patients with CLTI and foot tissue loss. Only 55 wounds (46%) could be ascribed to a peroneal angiosome. At 3 years, amputation-free survival in patients with DIR revascularization was 54.9% ± 7.3% compared with 56.5% ± 6.3% in patients with IND revascularization (P = .44), with no significant difference in wound healing. Amputation-free survival at 3 years in patients with two patent peroneal branches was 74.8% ± 6.9% compared with 45.0% ± 6.0% in patients with one patent peroneal branch (P = .003). Amputation-free survival at 3 years in patients with a patent pedal arch (Rutherford 0-1) was 73.0% ± 7.0% vs 45.7% ± 6.0% in patients with incomplete pedal arch (Rutherford 2-3; P = .0002). Amputation-free survival at 3 years in patients with grade 1 or grade 2 WIf

  10. Proposal of experimental study on particle diffusion in superficially confined plasma by magnetic multi-dipole fields

    International Nuclear Information System (INIS)

    Ferreira, J.L.; Ferreira, J.G.; Sandonato, G.M.; Damasio, W.C.; Montes, A.; Ludwig, G.O.

    1989-08-01

    The anomalous particle diffusion in regions near to magnetic confinement walls due to ion acoustic turbulence in superficially confined quiescent plasma is studied comparing the measured diffusion coefficient with the Bohm diffusion coefficient. The plasma diagnostics are carried out using Langmuir probe, electron and ion energy analyzers, emission probes for measuring plasma potential and, mass spectrometer, the purchase of data acquisition system composed by storage unit and signal register interfaced with IBM PC computer is proposed for simultaneous measurements with several diagnostics in the quiescent plasma machine of LAP-INPE operating in pulsed regime. (M.C.K.)

  11. HISTOPATHOLOGY OF MARGINAL SUPERFICIAL PERIODONTIUM AT MENOPAUSE

    Directory of Open Access Journals (Sweden)

    A. Georgescu

    2012-03-01

    Full Text Available Premises: Sexual hormones may affect the general health condition of women, as early as puberty, continuing during pregnancy and also after menopause. Variations of the hormonal levels may cause different – either local or general – pathological modifications. Sexual hormones may also affect periodontal status, favourizing gingival inflammations and reducing periodontal resistance to the action of the bacterial plaque. Scope: Establishment of the correlations between the debut or the manifestation of menopause and the modifications produced in the superficial periodontium. Materials and method: Clinical and paraclinical investigations were performed on female patients with ages between 45 and 66 years, involving macroscopic, microscopic and radiological recording of the aspect of the superificial periodontium (gingiva. Results: Analysis of the histological sections evidenced atrophic and involutive modifications in the marginal superficial periodontium of female patients at menopause. Conclusions: Sexual hormones intervene in the histological equilibrium of the marginal superficial periodontium, influencing the periodontal health status, which explains the correlation between the subjective symptomatology specific to menopause and the histopatological aspect at epithelial level.

  12. What factors control superficial lava dome explosivity?

    Science.gov (United States)

    Boudon, Georges; Balcone-Boissard, Hélène; Villemant, Benoît; Morgan, Daniel J.

    2015-01-01

    Dome-forming eruption is a frequent eruptive style and a major hazard on numerous volcanoes worldwide. Lava domes are built by slow extrusion of degassed, viscous magma and may be destroyed by gravitational collapse or explosion. The triggering of lava dome explosions is poorly understood: here we propose a new model of superficial lava-dome explosivity based upon a textural and geochemical study (vesicularity, microcrystallinity, cristobalite distribution, residual water contents, crystal transit times) of clasts produced by key eruptions. Superficial explosion of a growing lava dome may be promoted through porosity reduction caused by both vesicle flattening due to gas escape and syn-eruptive cristobalite precipitation. Both processes generate an impermeable and rigid carapace allowing overpressurisation of the inner parts of the lava dome by the rapid input of vesiculated magma batches. The relative thickness of the cristobalite-rich carapace is an inverse function of the external lava dome surface area. Explosive activity is thus more likely to occur at the onset of lava dome extrusion, in agreement with observations, as the likelihood of superficial lava dome explosions depends inversely on lava dome volume. This new result is of interest for the whole volcanological community and for risk management. PMID:26420069

  13. Soft theorems from anomalous symmetries

    Science.gov (United States)

    Huang, Yu-tin; Wen, Congkao

    2015-12-01

    We discuss constraints imposed by soft limits for effective field theories arising from symmetry breaking. In particular, we consider those associated with anomalous conformal symmetry as well as duality symmetries in supergravity. We verify these soft theorems for the dilaton effective action relevant for the a-theorem, as well as the one-loop effective action for N=4 supergravity. Using the universality of leading transcendental coefficients in the α' expansion of string theory amplitudes, we study the matrix elements of operator R 4 with half maximal supersymmetry. We construct the non-linear completion of R 4 that satisfies both single and double soft theorems up to seven points. This supports the existence of duality invariant completion of R 4.

  14. Soft theorems from anomalous symmetries

    Energy Technology Data Exchange (ETDEWEB)

    Huang, Yu-tin [Department of Physics and Astronomy, National Taiwan University,Taipei 10617, Taiwan, ROC (China); Wen, Congkao [I.N.F.N. Sezione di Roma “Tor Vergata”,Via della Ricerca Scientifica, 00133 Roma (Italy)

    2015-12-22

    We discuss constraints imposed by soft limits for effective field theories arising from symmetry breaking. In particular, we consider those associated with anomalous conformal symmetry as well as duality symmetries in supergravity. We verify these soft theorems for the dilaton effective action relevant for the a-theorem, as well as the one-loop effective action for N=4 supergravity. Using the universality of leading transcendental coefficients in the α{sup ′} expansion of string theory amplitudes, we study the matrix elements of operator R{sup 4} with half maximal supersymmetry. We construct the non-linear completion of R{sup 4} that satisfies both single and double soft theorems up to seven points. This supports the existence of duality invariant completion of R{sup 4}.

  15. Dinotor model for anomalous nuclei

    International Nuclear Information System (INIS)

    Castillejo, L.; Goldhaber, A.S.; Jackson, A.D.; Johnson, M.B.

    1986-01-01

    The simplest version of the MIT bag model implies the existence of metastable toroidal bags, with large radius proportional to the enclosed baryon number, and small radius comparable to that of an ordinary nucleon (we refer to those toroidal bags as dinotors). Considerations of various possible instabilities, and of the effects of quark interactions through intermediate gluons, suggest that the metastability is still valid when the model is treated more realistically. These results might provide an explanation for reports of anomalously large interaction cross sections of secondary fragments (''anomalons'') observed in visual track detectors. However, it appears that the most likely characteristics of toroidal bags would not be compatible with those of anomalons, and would not be as easy to detect in emulsions. copyright 1986 Academic Press, Inc

  16. Anomalous transport in mirror systems

    International Nuclear Information System (INIS)

    Post, R.F.

    1979-01-01

    As now being explored for fusion applications confinement systems based on the mirror principle embody two kinds of plasma regimes. These two regimes are: (a) high-beta plasmas, stabilized against MHD and other low frequency plasma instabilities by magnetic-well fields, but characterized by non-Maxwellian ion distributions; (b) near-Maxwellian plasmas, confined electrostatically (as in the tandem mirror) or in a field-reversed region within the mirror cell. Common to both situations are the questions of anomalous transport owing to high frequency instabilities in the non-maxwellian portions of the plasmas. This report will summarize the status of theory and of experimental data bearing on these questions, with particular reference to the high temperature regimes of interest for fusion power

  17. Anomalous Lorentz and CPT violation

    Science.gov (United States)

    Klinkhamer, F. R.

    2018-01-01

    If there exists Lorentz and CPT violation in nature, then it is crucial to discover and understand the underlying mechanism. In this contribution, we discuss one such mechanism which relies on four-dimensional chiral gauge theories defined over a spacetime manifold with topology ℛ3 × S 1 and periodic spin structure for the compact dimension. It can be shown that the effective gauge-field action contains a local Chern-Simons-like term which violates Lorentz and CPT invariance. For arbitrary Abelian U(1) gauge fields with trivial holonomies in the compact direction, this anomalous Lorentz and CPT violation has recently been established perturbatively with a Pauli-Villars-type regularization and nonperturbatively with a lattice regularization based on Ginsparg-Wilson fermions.

  18. Anomalous dispersion enhanced Cerenkov phase-matching

    Energy Technology Data Exchange (ETDEWEB)

    Kowalczyk, T.C.; Singer, K.D. [Case Western Reserve Univ., Cleveland, OH (United States). Dept. of Physics; Cahill, P.A. [Sandia National Labs., Albuquerque, NM (United States)

    1993-11-01

    The authors report on a scheme for phase-matching second harmonic generation in polymer waveguides based on the use of anomalous dispersion to optimize Cerenkov phase matching. They have used the theoretical results of Hashizume et al. and Onda and Ito to design an optimum structure for phase-matched conversion. They have found that the use of anomalous dispersion in the design results in a 100-fold enhancement in the calculated conversion efficiency. This technique also overcomes the limitation of anomalous dispersion phase-matching which results from absorption at the second harmonic. Experiments are in progress to demonstrate these results.

  19. Superficial tension: experimental model with simple materials

    Directory of Open Access Journals (Sweden)

    Tintori Ferreira, María Alejandra

    2012-09-01

    Full Text Available In this work appears a didactic offer based on an experimental activity using materials of very low cost, orientated to achieving that the student understand and interpret the phenomenon of superficial tension together with the importance of the modeling in sciences. It has as principal aim of education bring the student over to the mechanics of the static fluids and the intermolecular forces, combining scientific contents with questions near to the student what provides an additional motivation to the reflection of the scientific investigation.

  20. Temperature distributions in 136 superficial radiothermotherapies

    International Nuclear Information System (INIS)

    Willich, N.; Duve, S.; Pfluger, T.; Bachmeier, K.

    1992-01-01

    Temperature distributions from 136 superficial radiothermotherapies in patients were analysed and three-dimensionally reconstructed. The calculation of mean values and standard deviations of the temperature measuring probes considering water bolus temperature, master probe temperature, site of the probes relatively to different applicator positions and site of the probes in the heated tissues yielded satisfactory temperature distributions for chest wall treatment in contrast to other regions of the body. Radiothermotherapy was statistically not superior to radiotherapy alone with respect to local tumor control. (authors)

  1. Anomalous transport in heterogeneous media

    Science.gov (United States)

    Horbach, Jürgen; Siboni, Nima H.; Schnyder, Simon K.

    2017-08-01

    The diffusion dynamics of particles in heterogeneous media is studied using particle-based simulation techniques. A special focus is placed on systems where the transport of particles at long times exhibits anomalies such as subdiffusive or superdiffusive behavior. First, a two-dimensional model system is considered containing gas particles (tracers) that diffuse through a random arrangement of pinned, disk-shaped particles. This system is similar to a classical Lorentz gas. However, different from the original Lorentz model, soft instead of hard interactions are considered and we also discuss the case where the tracer particles interact with each other. We show that the modification from hard to soft interactions strongly affects anomalous-diffusive transport at high obstacle densities. Second, non-linear active micro-rheology in a glass-forming binary Yukawa mixture is investigated, pulling single particles through a deeply supercooled state by applying a constant force. Here, we observe superdiffusion in force direction and analyze its origin. Finally, we consider the Brownian dynamics of a particle which is pulled through a two-dimensional random force field. We discuss the similarities of this model with the Lorentz gas as well as active micro-rheology in glass-forming systems.

  2. Fast-tracked Rehabilitation and Return to Sport of an Elite Rugby Player with a Complicated Posterolateral Corner Injury and Associated Peroneal Paralysis

    NARCIS (Netherlands)

    Paget, L. D. A.; Kuijer, P. P. F. M.; Maas, M.; Kerkhoffs, G. M. M. J.

    2017-01-01

    Acute posterolateral corner injuries of the knee with associated hamstring avulsions and peroneal paralysis are rare in rugby. Regain of motor function following a complete paralysis is documented to be 38%. To our knowledge, only one case describes return to preinjury level of competitive sport

  3. Tunneling Anomalous and Spin Hall Effects.

    Science.gov (United States)

    Matos-Abiague, A; Fabian, J

    2015-07-31

    We predict, theoretically, the existence of the anomalous Hall effect when a tunneling current flows through a tunnel junction in which only one of the electrodes is magnetic. The interfacial spin-orbit coupling present in the barrier region induces a spin-dependent momentum filtering in the directions perpendicular to the tunneling current, resulting in a skew tunneling even in the absence of impurities. This produces an anomalous Hall conductance and spin Hall currents in the nonmagnetic electrode when a bias voltage is applied across the tunneling heterojunction. If the barrier is composed of a noncentrosymmetric material, the anomalous Hall conductance and spin Hall currents become anisotropic with respect to both the magnetization and crystallographic directions, allowing us to separate this interfacial phenomenon from the bulk anomalous and spin Hall contributions. The proposed effect should be useful for proving and quantifying the interfacial spin-orbit fields in metallic and metal-semiconductor systems.

  4. Anomalous effects of dense matter under rotation

    Science.gov (United States)

    Huang, Xu-Guang; Nishimura, Kentaro; Yamamoto, Naoki

    2018-02-01

    We study the anomaly induced effects of dense baryonic matter under rotation. We derive the anomalous terms that account for the chiral vortical effect in the low-energy effective theory for light Nambu-Goldstone modes. The anomalous terms lead to new physical consequences, such as the anomalous Hall energy current and spontaneous generation of angular momentum in a magnetic field (or spontaneous magnetization by rotation). In particular, we show that, due to the presence of such anomalous terms, the ground state of the quantum chromodynamics (QCD) under sufficiently fast rotation becomes the "chiral soliton lattice" of neutral pions that has lower energy than the QCD vacuum and nuclear matter. We briefly discuss the possible realization of the chiral soliton lattice induced by a fast rotation in noncentral heavy ion collisions.

  5. [Neuropathology of superficial hemosiderosis and neuroferritinopathy].

    Science.gov (United States)

    Takao, Masaki

    2012-01-01

    Neuropathology of superficial hemosiderosis. Gross finding shows diffuse brownish discoloration at the surface of the cerebrum, cerebellum, brainstem and spinal cord. Severe atrophy and necrosis is present in the cerebellum. Extensive deposits of hemosiderin that are well recognized with Berlin blue and ferritin immunohistochemistry are present at the surface and in the superficial parenchyma of the cerebrum, brainstem, cerebellum and spinal cord. Although the pathomechanism of this disease remains unresolved, continuous or recurrent subarachnoid hemorrhage may be important for developing diffuse hemosiderin deposition. Neuroferritinopathy. Intranuclear and intracytoplasmic bodies are seen in glia and subsets of neurons in the central nervous system as well as in extraneural tissue. They are stained by Perls' method for ferric iron. The bodies are immunopositive against antibodies raised against mutated and wild type of ferritin light polypeptide as well as ferritin heavy polypeptide. It is suggested that loss of normal function and gain of toxic function may be crucial for neurodegeneration of neuroferritinopathy. Both diseases could be helpful to understand and clarify the pathomechanism of neurodegeneration associated with iron metabolism.

  6. Superficial leiomyosarcoma: a clinicopathologic review and update.

    Science.gov (United States)

    Fauth, Clarissa T; Bruecks, Andrea Kristin; Temple, Walley; Arlette, John P; DiFrancesco, Lisa Marie

    2010-02-01

    Superficial leiomyosarcomas (SLMSs) are rare soft tissue malignancies. A clinicopathologic review of 25 cases was undertaken. Twenty-five cases diagnosed between 1990 and 2007 were reviewed. Clinical information was obtained from patient charts. Histologic slides were reviewed, and immunohistochemical stains were performed. All patients presented with a nodule. Fourteen tumors were confined to the dermis and 11 involved subcutaneous tissue. Smooth muscle markers were positive in all cases. CD117 was consistently negative. Novel histological features included epidermal hyperplasia, sclerotic collagen bands and increasing tumor grade with the depth of the lesion. Poor outcome was associated with size > 2 cm, high grade and depth of the lesion. SLMSs are rare but important smooth muscle tumors of the skin. The clinical presentation may be non-specific. The histologic appearance is that of a smooth muscle lesion, but epidermal hyperplasia and thickened collagen bands are previously underrecognized features. Immunohistochemical stains are useful in confirming smooth muscle differentiation, but CD117 is of limited utility. SLMS can appear low grade or even benign on superficial biopsies, leading to undergrading or a delay in the correct diagnosis. Clinicians and pathologists alike should therefore be aware of these pitfalls and must approach these cases with caution.

  7. An Anomalous Variation in the Innervation Pattern of the Peroneus ...

    African Journals Online (AJOL)

    opsig

    diagnosis or endanger the nerve during surgery, unsuspected in procedures such as surgical decompression of common peroneal nerve at the fibular head, percutaneous placement of wires in proximal tibia, high tibial osteotomy and biopsy of proximal fibula [4, 5]. The described anomaly is rare and it may be important to ...

  8. Social network extraction based on Web: 1. Related superficial methods

    Science.gov (United States)

    Khairuddin Matyuso Nasution, Mahyuddin

    2018-01-01

    Often the nature of something affects methods to resolve the related issues about it. Likewise, methods to extract social networks from the Web, but involve the structured data types differently. This paper reveals several methods of social network extraction from the same sources that is Web: the basic superficial method, the underlying superficial method, the description superficial method, and the related superficial methods. In complexity we derive the inequalities between methods and so are their computations. In this case, we find that different results from the same tools make the difference from the more complex to the simpler: Extraction of social network by involving co-occurrence is more complex than using occurrences.

  9. La Nación, Peronism, and the Origins of the Cold War in Argentina

    Directory of Open Access Journals (Sweden)

    Sánchez-Román, José Antonio

    2015-06-01

    Full Text Available This article deals with the international dimension of Argentine domestic policies by exploring one of the strategies of the conservative daily newspaper La Nación, between 1946 and 1950, in order to challenge Juan Perón’s hegemony. La Nación presented the Peronist regime as akin to the totalitarian regimes established under the Soviet Union’s vigilance. This is not surprising, but revealing the complex ideological mechanisms employed by La Nación in its strategy is a noteworthy endeavor. This work will provide a thorough exploration of the process through which La Nación shifted from its former opposition to Peronism, initially identified as a Nazi-Fascist movement, to a new articulation of the regime as a totalitarian one. To some extent this was not so different from the strategy that the United States’ (US intellectual elites were carrying out in order to justify their struggle against a former ally in war as a continuation of purpose and not a rupture. Yet, the most interesting aspect of this evolution in the Argentine case is that it emerged in an autonomous way as a result of specific national and international phenomena. This shows that the characteristics of the early phase of the Cold War were shaped by transnational processes of convergence rather than US hegemony alone.Este artículo analiza la dimensión internacional de la política interna argentina explorando la estrategia del diario conservador La Nación, entre 1946 y 1950 en su enfrentamiento con el gobierno de Juan Domingo Perón. La Nación presentó el régimen peronista como similar a los regímenes totalitarios establecidos bajo el control de la Unión Soviética. Esto no resulta sorprendente, pero comprender los complejos mecanismos ideológicos empleados por La Nación en esta estrategia es un objetivo relevante de investigación. Este artículo ofrece un análisis detallado del proceso que permitió a La Nación transformar su descripción del peronismo como

  10. Antibody conjugate radioimmunotherapy of superficial bladder cancer

    International Nuclear Information System (INIS)

    Perkins, Alan; Hopper, Melanie; Murray, Andrea; Frier, Malcolm; Bishop, Mike

    2002-01-01

    The administration of antibody conjugates for cancer therapy is now proving to be of clinical value. We are currently undertaking a programme of clinical studies using the monoclonal antibody C 595 (gG3) which reacts with the MUC1 glycoprotein antigen that is aberrantly expressed in a high proportion of bladder tumours. Radio immuno conjugates of the C 595 antibody have been produced with high radiolabelling efficiency and immuno reactivity using Tc-99 m and In-111 for diagnostic imaging, and disease staging and the cytotoxic radionuclides Cu-67 and Re-188 for therapy of superficial bladder cancer. A Phase I/II therapeutic trail involving the intravesical administration of antibody directly into the bladder has now begun. (author)

  11. Superficial thrombophlebitis of the breast (Mondor's disease)

    International Nuclear Information System (INIS)

    Becker, L.; McCurdy, L.I.; Taves, D.H.

    2001-01-01

    With breast imaging being increasingly the first investigation in the diagnosis of breast pathology, it is important for radiologists to be aware of the clinical and imaging characteristics of both malignant and benign breast lesions. Mondor's disease is a benign thrombophlebitis of the superficial veins of the breast, often extending to the chest wall, epigastrium or axilla, which has been demonstrated to have a rare association with underlying breast cancer. Mondor's disease was first described in 1869 but was named after the author of a series of 4 cases in 1939. Mondor's disease has only been reported once in the English-language imaging journals. We present a case of Mondor's disease with both the ultrasonographic and mammographic findings. (author)

  12. A current approach to superficial vein thrombosis.

    Science.gov (United States)

    Ellis, Martin H; Fajer, Simone

    2013-02-01

    Superficial vein thrombosis (SVT) is an entity commonly encountered in practice. While the clinical diagnosis is reasonably straightforward, care must be taken to exclude concurrent thrombosis of the deep veins, and the possibility of the presence of occult systemic illness such as malignancy should be considered. Recent studies of the epidemiology of SVT demonstrate a high incidence of concurrent deep vein thrombosis emphasizing the need for surveying the deep veins using compression ultrasonography. Treatment decisions are may now be based upon the results of randomized clinical trials and should include a period of anticoagulation using fondaparinux or a low molecular weight heparin. The appropriate doses and duration of therapy are not fully established, and the cost-effectiveness of these drugs for the treatment of SVT needs further evaluation. © 2012 John Wiley & Sons A/S.

  13. Diagnosis and treatment of superficial vein thrombosis.

    Science.gov (United States)

    Bauersachs, R M

    2013-08-01

    Superficial vein thrombosis (SVT) is a common disease, characterized by an inflammatory-thrombotic process in a superficial vein. Typical clinical findings are pain and a warm, tender, reddish cord along the vein. Until recently, no reliable epidemiological data were available. The incidence is estimated to be higher than that of deep-vein thrombosis (DVT) (1/1000). SVT shares many risk factors with DVT, but affects twice as many women than men and frequently occurs in varicose veins. Clinically, SVT extension is commonly underestimated, and patients may have asymptomatic DVT. Therefore, ultrasound assessment and exclusion of DVT is essential. Risk factors for concomitant DVT are recent hospitalization, immobilization, autoimmune disorders, age > 75 years, prior VTE, cancer and SVT in non-varicose veins. Even though most patients with isolated SVT (without concomitant DVT or PE) are commonly treated with anticoagulation for a median of 15 days, about 8% experience symptomatic thromboembolic complications within three months. Risk factors for occurrence of complications are male gender, history of VTE, cancer, SVT in a non-varicose vein or SVT involving the sapheno-femoral junction (SFJ). As evidence supporting treatment of isolated SVT was sparse and of poor quality, the large, randomized, double-blind, placebo-controlled CALISTO trial was initiated assessing the effect of fondaparinux on symptomatic outcomes in isolated SVT. This study showed that, compared with placebo, 2.5 mg fondaparinux given for 45 days reduced the risk of symptomatic thromboembolic complications by 85% without increasing bleeding. Based on CALISTO and other observational studies, evidence-based recommendations can be made for the majority of SVT patients. Further studies can now be performed in higher risk patients to address unresolved issues.

  14. Public health against a centralized state: institutions and welfare services in the province of Mendoza during the first Peronism

    Directory of Open Access Journals (Sweden)

    Ivana Hirschegger

    2016-10-01

    Full Text Available This research analyzes the state action in public health during the first Peronism and engages on some factors that determined the success or failure of policies at provincial level. The work also refers , through concrete examples , to smaller territorial units such as municipalities , while application areas of public policy or executors of them. Some of the questions that were attempted to answer what extent the new changes in the state structure were accompanied by concrete actions that have a bearing on the living conditions of the population? What obstacles limited government action? the realization of public works will be included in this analysis by the state , staff in charge , as well as investments in other resources necessary for adequate medical care.

  15. Volumetric and superficial characterization of carbon activated; Caracterizacion volumetrica y superficial de carbon activado

    Energy Technology Data Exchange (ETDEWEB)

    Carrera G, L.M.; Garcia S, I.; Jimenez B, J.; Solache R, M.; Lopez M, B.; Bulbulian G, S.; Olguin G, M.T. [Departamento de Quimica, Gerencia de Ciencias Basicas, Instituto Nacional de Investigaciones Nucleares, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    2000-07-01

    The activated carbon is the resultant material of the calcination process of natural carbonated materials as coconut shells or olive little bones. It is an excellent adsorbent of diluted substances, so much in colloidal form, as in particles form. Those substances are attracted and retained by the carbon surface. In this work is make the volumetric and superficial characterization of activated carbon treated thermically (300 Centigrade) in function of the grain size average. (Author)

  16. ON THE SOURCE OF ASTROMETRIC ANOMALOUS REFRACTION

    Energy Technology Data Exchange (ETDEWEB)

    Taylor, M. Suzanne [Department of Natural and Environmental Sciences, Western State Colorado University, 128 Hurst Hall, Gunnison, CO 81230 (United States); McGraw, John T.; Zimmer, Peter C. [Department of Physics and Astronomy, University of New Mexico, MSC07 4220, Albuquerque, NM 87131 (United States); Pier, Jeffrey R., E-mail: mstaylor@western.edu [Division of Astronomical Sciences, NSF 4201 Wilson Blvd, Arlington, VA 22230 (United States)

    2013-03-15

    More than a century ago, astronomers using transit telescopes to determine precise stellar positions were hampered by an unexplained periodic shifting of the stars they were observing. With the advent of CCD transit telescopes in the past three decades, this unexplained motion, termed 'anomalous refraction' by these early astronomers, is again being observed. Anomalous refraction is described as a low-frequency, large angular scale ({approx}2 Degree-Sign ) motion of the entire image plane with respect to the celestial coordinate system as observed and defined by astrometric catalogs. These motions, of typically several tenths of an arcsecond amplitude with timescales on the order of 10 minutes, are ubiquitous to ground-based drift-scan astrometric measurements regardless of location or telescopes used and have been attributed to the effect of tilting of equal-density layers of the atmosphere. The cause of this tilting has often been attributed to atmospheric gravity waves, but this cause has never been confirmed. Although theoretical models of atmospheric refraction show that atmospheric gravity waves are a plausible cause of anomalous refraction, an observational campaign specifically directed at defining this relationship provides clear evidence that anomalous refraction is not consistent with the passage of atmospheric gravity waves. The source of anomalous refraction is found to be meter-scale, slowly evolving quasi-coherent dynamical structures in the boundary layer below 60 m above ground level.

  17. Parametric probability distributions for anomalous change detection

    Energy Technology Data Exchange (ETDEWEB)

    Theiler, James P [Los Alamos National Laboratory; Foy, Bernard R [Los Alamos National Laboratory; Wohlberg, Brendt E [Los Alamos National Laboratory; Scovel, James C [Los Alamos National Laboratory

    2010-01-01

    The problem of anomalous change detection arises when two (or possibly more) images are taken of the same scene, but at different times. The aim is to discount the 'pervasive differences' that occur thoughout the imagery, due to the inevitably different conditions under which the images were taken (caused, for instance, by differences in illumination, atmospheric conditions, sensor calibration, or misregistration), and to focus instead on the 'anomalous changes' that actually take place in the scene. In general, anomalous change detection algorithms attempt to model these normal or pervasive differences, based on data taken directly from the imagery, and then identify as anomalous those pixels for which the model does not hold. For many algorithms, these models are expressed in terms of probability distributions, and there is a class of such algorithms that assume the distributions are Gaussian. By considering a broader class of distributions, however, a new class of anomalous change detection algorithms can be developed. We consider several parametric families of such distributions, derive the associated change detection algorithms, and compare the performance with standard algorithms that are based on Gaussian distributions. We find that it is often possible to significantly outperform these standard algorithms, even using relatively simple non-Gaussian models.

  18. Superficial Temporal Artery Pseudoaneurysm: A Report of Two ...

    African Journals Online (AJOL)

    We report two bleeding superficial temporal artery pseudoaneurysms managed in our centre. They presented with actively bleeding scalp swellings, one in the parietal region and the other in the temple. Diagnosis of superficial temporal artery pseudoaneurysm was made clinically in both cases. Xylocaine with Adrenaline ...

  19. Anomalous magnetohydrodynamics in the extreme relativistic domain

    CERN Document Server

    Giovannini, Massimo

    2016-01-01

    The evolution equations of anomalous magnetohydrodynamics are derived in the extreme relativistic regime and contrasted with the treatment of hydromagnetic nonlinearities pioneered by Lichnerowicz in the absence of anomalous currents. In particular we explore the situation where the conventional vector currents are complemented by the axial-vector currents arising either from the pseudo Nambu-Goldstone bosons of a spontaneously broken symmetry or because of finite fermionic density effects. After expanding the generally covariant equations in inverse powers of the conductivity, the relativistic analog of the magnetic diffusivity equation is derived in the presence of vortical and magnetic currents. While the anomalous contributions are generally suppressed by the diffusivity, they are shown to disappear in the perfectly conducting limit. When the flow is irrotational, boost-invariant and with vanishing four-acceleration the corresponding evolution equations are explicitly integrated so that the various physic...

  20. Anomalous biceps origin from the rotator cuff

    Directory of Open Access Journals (Sweden)

    Samik Banerjee

    2015-01-01

    Full Text Available Variations in the origin of the long head of biceps tendon (LHBT have been described in literature; however, its clinical significance remains uncertain. We describe in this report, the history, physical examination and the arthroscopic findings in a patient who had an anomalous origin of the LHBT from the rotator cuff, resulting in restriction of range of motion. This anomalous origin of the long head of biceps tendon causing capsular contracture and restriction of movements leading to secondary internal impingement, has not been extensively reported in the literature. Shoulder arthroscopists should be aware that, although, an uncommon clinical condition, the aberrant congenital origin of the LHBT from the rotator cuff can rarely become pathologic in middle age and lead to shoulder dysfunction. In such cases, release of the anomalous band may be required, along with the treatment of other concomitant intraarticular pathologies in the glenohumeral joint.

  1. Total least squares for anomalous change detection

    Science.gov (United States)

    Theiler, James; Matsekh, Anna M.

    2010-04-01

    A family of subtraction-based anomalous change detection algorithms is derived from a total least squares (TLSQ) framework. This provides an alternative to the well-known chronochrome algorithm, which is derived from ordinary least squares. In both cases, the most anomalous changes are identified with the pixels that exhibit the largest residuals with respect to the regression of the two images against each other. The family of TLSQbased anomalous change detectors is shown to be equivalent to the subspace RX formulation for straight anomaly detection, but applied to the stacked space. However, this family is not invariant to linear coordinate transforms. On the other hand, whitened TLSQ is coordinate invariant, and special cases of it are equivalent to canonical correlation analysis and optimized covariance equalization. What whitened TLSQ offers is a generalization of these algorithms with the potential for better performance.

  2. The anomalous magnetic moment of the muon

    CERN Document Server

    Jegerlehner, Friedrich

    2017-01-01

    This research monograph covers extensively the theory of the muon anomalous magnetic moment and provides estimates of the theoretical uncertainties. The muon anomalous magnetic moment is one of the most precisely measured quantities in elementary particle physics and provides one of the most stringent tests of relativistic quantum field theory as a fundamental theoretical framework. It allows for an extremely precise check of the standard model of elementary particles and of its limitations. This book reviews the present state of knowledge of the anomalous magnetic moment a=(g-2)/2 of the muon. Recent experiments at the Brookhaven National Laboratory now reach the unbelievable precision of 0.5 parts per million, improving the accuracy of previous g-2 experiments at CERN by a factor of 14. In addition, quantum electrodynamics and electroweak and hadronic effects are reviewed. Since non-perturbative hadronic effects play a key role for the precision test, their evaluation is described in detail. Perspectives fo...

  3. Fractional diffusion equations and anomalous diffusion

    CERN Document Server

    Evangelista, Luiz Roberto

    2018-01-01

    Anomalous diffusion has been detected in a wide variety of scenarios, from fractal media, systems with memory, transport processes in porous media, to fluctuations of financial markets, tumour growth, and complex fluids. Providing a contemporary treatment of this process, this book examines the recent literature on anomalous diffusion and covers a rich class of problems in which surface effects are important, offering detailed mathematical tools of usual and fractional calculus for a wide audience of scientists and graduate students in physics, mathematics, chemistry and engineering. Including the basic mathematical tools needed to understand the rules for operating with the fractional derivatives and fractional differential equations, this self-contained text presents the possibility of using fractional diffusion equations with anomalous diffusion phenomena to propose powerful mathematical models for a large variety of fundamental and practical problems in a fast-growing field of research.

  4. Superficial Water Concessions In Light Of The General Theory of the Administrative Act” The Incidence of the Public Law’s Dogmatic Tradition of Public Law Within Environmental Law

    Directory of Open Access Journals (Sweden)

    Andrés Gómez-Rey

    2010-11-01

    Full Text Available This paper seeks the determine the ways in which anomalous decisions derived from the particularization and constitutionalization of environmental law can arise given the general theory of administrative action. This is seen through the lens of a study and characterization of administrative decisions issued by the Regional Autonomous Corporation of Cundinamarca –CAR- within the superficial water concessions procedure. It also discusses the conceptual contents of these licenses.

  5. Superficial siderosis: Case report and literature review

    Directory of Open Access Journals (Sweden)

    Kresojević Nikola D.

    2013-01-01

    Full Text Available Introduction. Superficial siderosis (SS is caused by chronic subarachnoid bleeding and is characterized by free iron and hemosiderin deposition along the pial and subpial structures of central nervous system. SS leads to progressive and irreversible CNS damage. The most common causes of chronic subarachnoidal bleeding are tumors, head and spinal cord trauma, arteriovenous malformations and aneurysms. SS is characterized by clinical triad: sensorineural hearing loss, cerebellar ataxia and piramydal signs. Brain MR imaging is the investigation of choice for the diagnosis of SS. Typical findings include hypointensities seen on T2­weighted MR imaging around the brain, cerebellum, brain stem, spinal cord, VIII cranial nerve and atrophy of cerebellum and medulla. Case Outline. A 71-year­old female patient noticed hand tremor in the middle of the third decade of life, and later slowly progressive bilateral hearing loss. At the age of 64 she developed un­ steady gate, hand clumsiness and dysarthria, to became incapable of independent walking and standing five years later. Clinical course and brain MRI findings were typical for SS, but additional investigation did not reveal the couse of subarahnoidal bleeding. Conclusion. SS represents a rare and under­recognized condition that must be considered in all patients with cerebellar syndrome of unknown cause. Early diagnosis of SS in some cases with identified cause of chronic bleeding allowes therapeutic interventions that may prevent further progression of the disease. [Projekat Ministarstva nauke Republike Srbije, br. 175090

  6. Peroneal nerve palsy: a complication of umbilical artery catheterization in the full-term newborn of a mother with diabetes.

    Science.gov (United States)

    Giannakopoulou, Christina; Korakaki, Eftichia; Hatzidaki, Eleftheria; Manoura, Antonia; Aligizakis, Agisilaos; Velivasakis, Emmanuel

    2002-04-01

    Umbilical artery catheters are an essential aid in the treatment of newborn infants who have cardiopulmonary disease. However, it is well-known that umbilical artery catheterization is associated with complications. The most frequent visible problem in an umbilical line is blanching or cyanosis of part or all of a distal extremity or the buttock area resulting from either vasospasm or a thrombotic or embolic incidence. Ischemic necrosis of the gluteal region is a rare complication of umbilical artery catheterization. We report the case of a full-term infant of an insulin-dependent diabetic mother with poor blood glucose control who developed a left peroneal nerve palsy after ischemic necrosis of the gluteal region after umbilical artery catheterization. The infant was born weighing 5050 g. The mother of the infant had preexisting diabetes mellitus that was treated with insulin from the age of 14 years. The metabolic control of the mother had been unstable both before and during the pregnancy. The neonate developed respiratory distress syndrome soon after birth and was immediately transferred to the neonatal intensive care unit. Mechanical ventilation via endotracheal tube was quickly considered necessary after rapid pulmonary deterioration. Her blood glucose levels were 13 mg/dL. A 3.5-gauge umbilical catheter was inserted into the left umbilical artery for blood sampling without difficulty when the infant required 100% oxygen to maintain satisfactory arterial oxygen pressure. Femoral pulses and circulation in the lower limbs were normal immediately before and after catheterization. A radiograph, which was taken immediately, showed the tip of the catheter to be at a level between the fourth and fifth sacral vertebrae. The catheter was removed immediately. Circulation and femoral pulses were normal and no blanching of the skin was observed. Another catheter was repositioned and the tip was confirmed radiologically to be in the thoracic aorta between the sixth and

  7. Peronism, post-Peronist and professionalization: academic trajectories, strategies for self-preservation and disciple circles in Buenos Aires, 1945-1963

    Directory of Open Access Journals (Sweden)

    Pablo Perazzi

    2014-10-01

    Full Text Available In this article I analyze the anthropological field in Buenos Aires in the period between 1945 and 1963. The aim is to reconstruct the trajectories, the repositioning and the strategies adopted by distinguished members of the field towards Peronism and in the later stage. It argues that while the state's presence changed the conditions of action of the agents (leading them to extend the dispute into the political arena, there appears to have been a crisis of hierarchies, a dismemberment of disciple circles or an alteration of the rules of succession. Therefore, our hypothesis is that, although the advent of Peronism would draw antagonisms, their mark on the discipline system was secondary, predominantly self-preservation mechanisms, networks of sociability, interpersonal loyalties and affinities. In that sense, I try to show the operation of the logic of academic production and reproduction (the relative autonomy of the field in a time of enormous political, ideological and intellectual effervescence

  8. Microclimate and development of pressure ulcers and superficial skin changes.

    Science.gov (United States)

    Yusuf, Saldy; Okuwa, Mayumi; Shigeta, Yoshie; Dai, Misako; Iuchi, Terumi; Rahman, Sulaiman; Usman, Awaluddin; Kasim, Sukmawati; Sugama, Junko; Nakatani, Toshio; Sanada, Hiromi

    2015-02-01

    This study aims to evaluate the microclimate and development of pressure ulcers and superficial skin changes. A prospective cohort study was conducted in an acute care ward in Indonesia. Risk factors for pressure ulcers and superficial skin changes were identified based on the Bergstrom Braden conceptual model. Microclimate data were collected every 3 days for 15 days while the development of pressure ulcers and superficial skin changes was observed every day. Pressure ulcers and superficial skin changes were developed in 20 of the 71 participants. Total mean difference in skin temperature was higher for patients with pressure ulcers and superficial skin changes (0·9 ± 0·6°C) compared with controls (0·6 ± 0·8°C) (P = 0·071). Binary logistic regression predictor values for pressure ulcers and superficial skin changes were 0·111 for type of sheet and 0·347 for Braden Scale results. In conclusion, difference in skin temperature seems to be a predictor for pressure ulcer development and superficial skin changes, while synthetic fibre sheets are able to maintain a beneficial microclimate. © 2013 The Authors. International Wound Journal © 2013 Medicalhelplines.com Inc and John Wiley & Sons Ltd.

  9. Characterization of a porcine model of chronic superficial varicose veins.

    Science.gov (United States)

    Jones, Gregory T; Grant, Mark W; Thomson, Ian A; Hill, B Geraldine; van Rij, André M

    2009-06-01

    Previous animal models of venous disease, while inducing venous hypertension and valvular insufficiency, do not produce superficial varicose veins. In this study, we aimed to develop and characterize a pig-based model of superficial varicose veins. Right femoral arteriovenous fistulae (AVF) were surgically fashioned in young adult pigs. Animals were examined at postoperative times up to 15 weeks to determine the development of varicose veins and measurement of both blood pressure and flow velocities within the superficial thigh veins. Histology and vascular corrosion casts were used to characterize the resulting structural venous alterations. Porcine pathophysiological features were compared with those of human primary superficial varicose veins. Gross superficial varicosities developed over the ipsilateral medial thigh region after an initial lag period of 1-2 weeks. Veins demonstrated retrograde filling with valvular incompetence, and a moderate, non-pulsatile, venous hypertension, which was altered by changes in posture and Valsalva. Venous blood flow velocities were elevated to 15-30 cm/s in varicose veins. Structurally, pig varicose veins were enlarged, tortuous, had valvular degeneration, and regions of focal medial atrophy with or without overlying intimal thickening. The superficial varicose veins, which developed within this model, have a pathophysiology that is consistent with that observed in humans. The porcine femoral AVF model is proposed as a suitable experimental model to evaluate the pathobiology of superficial venous disease. It may also be suitable for the evaluation of treatment interventions including drug therapy.

  10. Peroneal muscular atrophy with pyramidal tract features (hereditary motor and sensory neuropathy type V): a clinical, neurophysiological, and pathological study of a large kindred.

    OpenAIRE

    Frith, J A; McLeod, J G; Nicholson, G A; Yang, F

    1994-01-01

    A large family with autosomal dominant inheritance of peroneal muscular atrophy, associated with extensor plantar responses in some cases, has been studied. Onset was usually in the first two decades and spasticity was not a feature. Nerve conduction studies in 21 cases and light and electron microscope findings on six sural nerve biopsies were similar to those in hereditary motor and sensory neuropathy type II.

  11. Prevalence of superficial siderosis following singular, acute aneurysmal subarachnoid hemorrhage

    Energy Technology Data Exchange (ETDEWEB)

    Lummel, N.; Bochmann, K. [Ludwig-Maximilian-University, Department of Neuroradiology, Klinikum Grosshadern, Munich (Germany); Bernau, C. [Leibniz-Rechenzentrum, Munich (Germany); Thon, N. [Ludwig-Maximilian-University, Department of Neurosurgery, Klinikum Grosshadern, Munich (Germany); Linn, J. [Technical University, Department of Neuroradiology, Klinikum Dresden, Dresden (Germany)

    2015-04-01

    Superficial siderosis is presumably a consequence of recurrent bleeding into the subarachnoid space. The objective of this study was to assess the prevalence of superficial siderosis after singular, aneurysmal subarachnoid hemorrhage (SAH) in the long term. We retrospectively identified all patients who presented with a singular, acute, aneurysmal SAH at our institution between 2010 and 2013 and in whom a magnetic resonance imaging (MRI) including T2*-weighted imaging was available at least 4 months after the acute bleeding event. MRI scans were judged concerning the presence and distribution of superficial siderosis. Influence of clinical data, Fisher grade, localization, and cause of SAH as well as the impact of neurosurgical interventions on the occurrence of superficial siderosis was tested. Seventy-two patients with a total of 117 MRIs were included. Mean delay between SAH and the last available MRI was 47.4 months (range 4-129). SAH was Fisher grade 1 in 2 cases, 2 in 4 cases, 3 in 10 cases, and 4 in 56 cases. Superficial siderosis was detected in 39 patients (54.2 %). In all patients with more than one MRI scan, localization and distribution of superficial siderosis did not change over time. Older age (p = 0.02) and higher degree of SAH (p = 0.03) were significantly associated with the development of superficial siderosis. Superficial siderosis develops in approximately half of patients after singular, aneurysmal SAH and might be more common in patients with an older age and a greater amount of blood. However, additional factors must play a role in whether a patient is prone to develop superficial siderosis or not. (orig.)

  12. 'Complexity' and anomalous transport in space plasmas

    International Nuclear Information System (INIS)

    Chang, Tom; Wu Chengchin

    2002-01-01

    'Complexity' has become a hot topic in nearly every field of modern physics. Space plasma is of no exception. In this paper, it is demonstrated that the sporadic and localized interactions of magnetic coherent structures are the origin of 'complexity' in space plasmas. The intermittent localized interactions, which generate the anomalous diffusion, transport, and evolution of the macroscopic state variables of the overall dynamical system, may be modeled by a triggered (fast) localized chaotic growth equation of a set of relevant order parameters. Such processes would generally pave the way for the global system to evolve into a 'complex' state of long-ranged interactions of fluctuations, displaying the phenomenon of forced and/or self-organized criticality. An example of such type of anomalous transport and evolution in a sheared magnetic field is provided via two-dimensional magnetohydrodynamic simulations. The coarse-grained dissipation due to the intermittent triggered interactions among the magnetic coherent structures induces a 'fluctuation-induced nonlinear instability' that reconfigures the sheared magnetic field into an X-point magnetic geometry (in the mean field sense), leading to the anomalous acceleration of the magnetic coherent structures. A phenomenon akin to such type of anomalous transport and acceleration, the so-called bursty bulk flows, has been commonly observed in the plasma sheet of the Earth's magnetotail

  13. Anomalous Hall conductivity: Local orbitals approach

    Czech Academy of Sciences Publication Activity Database

    Středa, Pavel

    2010-01-01

    Roč. 82, č. 4 (2010), 045115/1-045115/9 ISSN 1098-0121 Institutional research plan: CEZ:AV0Z10100521 Keywords : anomalous Hall effect * Berry phase correction * orbital polarization momentum Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 3.772, year: 2010

  14. Intrinsic anomalous Hall effect and local polarizabilities

    Czech Academy of Sciences Publication Activity Database

    Středa, Pavel; Jonckheere, T.

    2010-01-01

    Roč. 82, č. 11 (2010), 113303/1-113303/4 ISSN 1098-0121 R&D Projects: GA ČR GA202/08/0551 Institutional research plan: CEZ:AV0Z10100521 Keywords : orbital polarization momentum * Berry phase correction * anomalous Hall effect Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 3.772, year: 2010

  15. Anomalous Seebeck coefficient in boron carbides

    International Nuclear Information System (INIS)

    Aselage, T.L.; Emin, D.; Wood, C.; Mackinnon, I.D.R.; Howard, I.A.

    1987-01-01

    Boron carbides exhibit an anomalously large Seebeck coefficient with a temperature coefficient that is characteristic of polaronic hopping between inequivalent sites. The inequivalence in the sites is associated with disorder in the solid. The temperature dependence of the Seebeck coefficient for materials prepared by different techniques provides insight into the nature of the disorder

  16. On the photon anomalous magnetic moment

    International Nuclear Information System (INIS)

    Perez Rojas, Hugo

    2006-01-01

    It is shown that, due to radioactive corrections, the photon exhibits a nonzero anomalous magnetic moment whenever it has a nonzero perpendicular momentum component to an external constant magnetic field. Its behaviour is discussed near the first threshold of pair creation. The results might be interesting due to its astrophysical consequenc

  17. Total least squares for anomalous change detection

    Energy Technology Data Exchange (ETDEWEB)

    Theiler, James P [Los Alamos National Laboratory; Matsekh, Anna M [Los Alamos National Laboratory

    2010-01-01

    A family of difference-based anomalous change detection algorithms is derived from a total least squares (TLSQ) framework. This provides an alternative to the well-known chronochrome algorithm, which is derived from ordinary least squares. In both cases, the most anomalous changes are identified with the pixels that exhibit the largest residuals with respect to the regression of the two images against each other. The family of TLSQ-based anomalous change detectors is shown to be equivalent to the subspace RX formulation for straight anomaly detection, but applied to the stacked space. However, this family is not invariant to linear coordinate transforms. On the other hand, whitened TLSQ is coordinate invariant, and furthermore it is shown to be equivalent to the optimized covariance equalization algorithm. What whitened TLSQ offers, in addition to connecting with a common language the derivations of two of the most popular anomalous change detection algorithms - chronochrome and covariance equalization - is a generalization of these algorithms with the potential for better performance.

  18. Anomalous transport and neutral beam heating

    International Nuclear Information System (INIS)

    Mercier, C.; Capes, H.

    1982-01-01

    Principal results of the Tokamak experiment simulations with Makokot are presented. The study of the density evolution and the temperature-density sawtooth oscillations suggest the use of generalized anomalous fluxes. This new empirical model is applied for TFR and JIPP T-II and some projections are given for the JET. (author)

  19. Anomalous dark growth rings in black cherry

    Science.gov (United States)

    Robert P. Long; David W. Trimpey; Michael C. Wiemann; Susan L. Stout

    2012-01-01

    Anomalous dark growth rings have been observed in black cherry (Prunus serotina) sawlogs from northwestern Pennsylvania making the logs unsuitable for veneer products. Thirty-six cross sections with dark rings, each traceable to one of ten stands, were obtained from a local mill and sections were dated and annual ring widths were measured. One or...

  20. Anomalous Hall effect in disordered multiband metals

    Czech Academy of Sciences Publication Activity Database

    Kovalev, A.A.; Sinova, Jairo; Tserkovnyak, Y.

    2010-01-01

    Roč. 105, č. 3 (2010), 036601/1-036601/4 ISSN 0031-9007 Institutional research plan: CEZ:AV0Z10100521 Keywords : anomalous Hall effect * spintronics Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 7.621, year: 2010

  1. Anomalous VVH interactions at a linear collider

    Indian Academy of Sciences (India)

    We examine, in a model independent way, the sensitivity of a linear collider to the couplings of a light Higgs boson to a pair of gauge bosons, including the possibility of CP violation. We construct several observables that probe the various possible anomalous couplings. For an intermediate mass Higgs, a collider operating ...

  2. Bunburra Rockhole: A New Anomalous Achondrite

    Czech Academy of Sciences Publication Activity Database

    Bland, P.A.; Spurný, Pavel; Greenwood, R.C.; Towner, M.C.; Bevan, A.W.R.; Bottke jr., W.F.; Shrbený, Lukáš; McClafferty, T.; Vaughan, D.; Benedix, G.K.; Franchi, I.A.; Hough, R.M.

    2009-01-01

    Roč. 72, Supplement (2009), A34-A34 ISSN 1086-9379. [Annual Meeting of the Meteoritical Society /72./. Nancy, 13.06.2009-18.06.2009] Institutional research plan: CEZ:AV0Z10030501 Keywords : Bunburra Rockhole * anomalous achondrite Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics Impact factor: 3.253, year: 2009

  3. Anomalous transport effects and possible environmental symmetry ...

    Indian Academy of Sciences (India)

    2015-05-06

    May 6, 2015 ... The heavy-ion collision provides a unique many-body environment where local domains of strongly interacting chiral medium may occur and in a sense allow environmental symmetry 'violation' phenomena. For example, certain anomalous transport processes, forbidden in usual medium, become possible ...

  4. Examination of anomalous self-experience

    DEFF Research Database (Denmark)

    Raballo, Andrea; Parnas, Josef

    2012-01-01

    A growing body of evidence points to the clinical and heuristic value of anomalous subjective experiences (ASEs) for the characterization of schizophrenia spectrum vulnerability and early detection purposes. In particular, a subgroup of ASEs, entailing basic disorders of self-awareness (self-diso...

  5. Anomalous Levinson theorem and supersymmetric quantum mechanics

    International Nuclear Information System (INIS)

    Boya, L.J.; Casahorran, J.; Esteve, J.G.

    1993-01-01

    We analyse the symmetry breaking associated to anomalous realization of supersymmetry in the context of SUSY QM. In this case one of the SUSY partners is singular; that leads to peculiar forms of the Levinson theorem relating phase shifts and bound states. Some examples are exhibited; peculiarities include negative energies, incomplete pairing of states and extra phases in scattering. (Author) 8 refs

  6. Revisión sobre modelado de superficies complejas

    Directory of Open Access Journals (Sweden)

    Juan D. Osorio

    2004-01-01

    Full Text Available Este artículo presenta una revisión de las técnicas más empleadas para la obtención de modelos computacionales de superficies complejas. Estas representaciones están siendo utilizadas en diversas áreas de la industria mediante procedimientos de ingeniería reversa. Las tres principales categorías son las superficies funcionales (implícitas, paramétricas y las superficies complejas simplicial (mallas triangulares. Se realiza un paralelo entre estos métodos y se exponen las ventajas y las desventajas de cada una de estas representaciones.

  7. Superficial vein thrombosis and deep vein thrombosis – a comparison

    OpenAIRE

    Krasiński, Zbigniew; Aniukiewicz, Krzysztof; Krasińska, Aleksandra; Krasińska, Beata; Gabriel, Marcin

    2017-01-01

    Although superficial vein thrombosis is commonly considered a rather minor condition, a number of studies indicate that its consequences can be much more severe. Since the introduction of Doppler ultrasonography to common diagnosis of venous diseases, the approach to threats associated with superficial vein thrombosis has changed, mainly in the context of venous thromboembolism. Superficial thrombosis in varicose veins must be differentiated from that occurring in patients without...

  8. Anomalous transport phenomena in px+i py superconductors

    Science.gov (United States)

    Li, Songci; Andreev, A. V.; Spivak, B. Z.

    2015-09-01

    Spontaneous breaking of time-reversal symmetry in superconductors with the px+i py symmetry of the order parameter allows for a class of effects which are analogous to the anomalous Hall effect in ferromagnets. These effects exist below the critical temperature, T anomalous Hall thermal conductivity, the polar Kerr effect, the anomalous Hall effect, and the anomalous photo- and acousto-galvanic effects.

  9. Hemipelvic irradiation for superficial bladder cancer

    International Nuclear Information System (INIS)

    Tashiro, Kazuya; Machida, Toyohei; Ooishi, Yukihiko; Ueda, Masataka; Kido, Akira; Wada, Tetsuro; Yoshigoe, Fukuo; Yamashita, Takashi; Mochizuki, Sachio

    1985-01-01

    In 15 patients with superficial bladder cancer hemipelvic irradiation was performed for prevention of relapse of cancer and decrease in side effects with following results. All patients received TUR-Bt at our department during the six years period from 1978 to 1983. As to stages, one was classified as Ta, 11 as T 1 and 3 as T 2, and pathologic diagnosis was transitional epithelial carcinoma of grade 1 in 1 case, grade 2 in 8 cases and grade 3 in 6 cases. Irradiation was started from the 7 th to 14 th day after TUR-Bt. At first, hemipelvic anterior and posterior field including the field from the affected pelvis to 1 to 2 cm beyond the midline toward the contralateral side and from the aortic bifurcation to the prostatic urethra were irradiated at a dose of 45 Gy. Then, whole bladder field was given an additional rotation irradiation of 20 Gy. The mean observation period was 43 months (ranging from 12 to 79 months) and relapse of cancer was observed in 6 cases out of 15 cases (40%). The site of relapse was in the irradiated site in 2 cases, contralateral site in 3 cases and both side in 1 cases. However, in all of the relapsed cases no aggravation in differential degree or progression in stage was observed. As the side effects, radiation cystitis developed as a delayed damage in 1 case. Thus, although no efficacy for prevention of relapse which we had expected was not seen, this irradiation method effectively inhibited the progression of lesion and development of delayed damage. (author)

  10. Hemipelvic irradiation for superficial bladder cancer

    Energy Technology Data Exchange (ETDEWEB)

    Tashiro, Kazuya; Machida, Toyohei; Ooishi, Yukihiko; Ueda, Masataka; Kido, Akira; Wada, Tetsuro; Yoshigoe, Fukuo; Yamashita, Takashi; Mochizuki, Sachio

    1985-02-01

    In 15 patients with superficial bladder cancer hemipelvic irradiation was performed for prevention of relapse of cancer and decrease in side effects with following results. All patients received TUR-Bt at our department during the six years period from 1978 to 1983. As to stages, one was classified as Ta, 11 as T 1 and 3 as T 2, and pathologic diagnosis was transitional epithelial carcinoma of grade 1 in 1 case, grade 2 in 8 cases and grade 3 in 6 cases. Irradiation was started from the 7 th to 14 th day after TUR-Bt. At first, hemipelvic anterior and posterior field including the field from the affected pelvis to 1 to 2 cm beyond the midline toward the contralateral side and from the aortic bifurcation to the prostatic urethra were irradiated at a dose of 45 Gy. Then, whole bladder field was given an additional rotation irradiation of 20 Gy. The mean observation period was 43 months (ranging from 12 to 79 months) and relapse of cancer was observed in 6 cases out of 15 cases (40%). The site of relapse was in the irradiated site in 2 cases, contralateral site in 3 cases and both side in 1 cases. However, in all of the relapsed cases no aggravation in differential degree or progression in stage was observed. As the side effects, radiation cystitis developed as a delayed damage in 1 case. Thus, although no efficacy for prevention of relapse which we had expected was not seen, this irradiation method effectively inhibited the progression of lesion and development of delayed damage. (author).

  11. Trauma ocular ocupacional por corpo estranho superficial

    Directory of Open Access Journals (Sweden)

    Leal Fernando Antônio de Macedo

    2003-01-01

    Full Text Available OBJETIVO: Estudar a ocorrência de trauma ocular provocado por corpos estranhos superficiais durante a realização de atividades ocupacionais. MÉTODOS: Estudo prospectivo de pacientes portadores de trauma ocular ocupacional atendidos no serviço de urgência do Hospital Getúlio Vargas (HGV / Universidade Federal do Piauí (UFPI, no período de outubro de 1997 a março de 1999. Os seguintes dados foram coletados: idade, sexo, profissão, olho afetado, atividade realizada durante o trauma, natureza do corpo estranho, localização do mesmo e doença ocorrida. RESULTADOS: Foram estudados 713 pacientes, sendo 686 (96,21% do sexo masculino e 27 (3,79% do sexo feminino. Os pacientes foram acometidos principalmente na terceira década de vida, correspondendo a um total de 312 pacientes (43,75%. Com relação à atividade desenvolvida durante o trauma, 158 pacientes (22,16% eram metalúrgicos, 153 (21,46% serralheiros e 126 (17,67% mecânicos. No tocante ao corpo estranho, 489 (68,58% eram ferro e 47 (6,59% outros metais. Referente a localização, 587 corpos estranhos (81,64% estavam localizados na córnea, 75 (10,43% na conjuntiva tarsal e 49 (6,81% na conjuntiva bulbar. Além dos corpos estranhos 361 (48,39% dos pacientes apresentaram abrasão córneo-conjuntival. CONCLUSÃO: O corpo estranho superficial é importante causa de trauma ocular ocupacional. A atividade desenvolvida principalmente por indivíduos do sexo masculino na metalurgia, serralheria e mecânica foi a principal causa do trauma, sendo o ferro e outros metais os mais freqüentes corpos estranhos encontrados.

  12. Antibody conjugate radioimmunotherapy of superficial bladder cancer

    Directory of Open Access Journals (Sweden)

    Alan Perkins

    2002-09-01

    Full Text Available The administration of antibody conjugates for cancer therapy is now proving to be of clinical value. We are currently undertaking a programme of clinical studies using the monoclonal antibody C595 (IgG3 which reacts with the MUC1 glycoprotein antigen that is aberrantly expressed in a high proportion of bladder tumours. Radioimmunoconjugates of the C595 antibody have been produced with high radiolabelling efficiency and immunoreactivity using Tc-99m and In-111 for diagnostic imaging, and disease staging and the cytotoxic radionuclides Cu-67 and Re-188 for therapy of superficial bladder cancer. A Phase I/II therapeutic trail involving the intravesical administration of antibody directly into the bladder has now begun.A administração de anticorpos conjugados para o tratamento do câncer está agora provando ser de valor clínico. Nós estamos atualmente realizando um programa de estudos clínicos usando o anticorpo monoclonal C595 (IgG3 que reage com a glicoproteína MUC1 que está aberrantemente expressa numa alta proporção de tumores de bexiga. Tem sido produzidos radioimunoconjugados do anticorpo C595, com alta eficiência de radiomarcação e a imunoreatividade, usando-se o Tc-99m e In-111, para o diagnóstico por imagem e estagiamento de doenças. Tem sido produzidos, também, radionuclídeos citotóxicos (Cu-67 e Re-188 para o tratamento de cânceres superficiais de bexiga. A fase terapêutica I/II já se iniciou, envolvendo a administração intravesical do anticorpo diretamente na bexiga.

  13. Trauma ocupacional por corpo estranho corneano superficial Occupational trauma due to superficial corneal foreign body

    Directory of Open Access Journals (Sweden)

    Vanessa Miroski Gerente

    2008-04-01

    Full Text Available OBJETIVO: Avaliar a epidemiologia do trauma ocular por corpo estranho superficial de córnea. MÉTODOS: Os pacientes atendidos no Pronto-Socorro da Universidade Federal de São Paulo entre abril e junho de 2005 que apresentaram corpo estranho superficial de córnea foram entrevistados. Foram avaliados: sexo, idade, profissão, registro legal do emprego, uso, disponibilidade e tipo de equipamentos de proteção utilizados e a fiscalização do seu uso. O conhecimento das complicações deste tipo de acidente também foi avaliado. Os resultados foram analisados com teste do qui quadrado ou teste de Fisher. RESULTADOS: Foram entrevistados 123 pacientes. Apenas 3 eram do sexo feminino e a idade média foi de 36 anos. A maioria destes traumas ocorreu no ambiente de trabalho (86,2% e 58,4% não possuíam registro legal do emprego. As profissões mais freqüentemente envolvidas foram serralheiro, pedreiro e metalúrgico. Em 79,8% dos locais de trabalho havia equipamentos de proteção e 85,3% dos pacientes eram orientados a usá-los. Em 52,4% dos locais sua utilização era fiscalizada, mas apenas 34,2% usavam no momento do trauma. A utilização foi mais freqüente (p=0,008 e fiscalização mais presente (p=0,0415 entre pacientes com registro legal de emprego. Questionados sobre os riscos, 68,9% dos pacientes tinham consciência das complicações graves deste tipo de acidente. CONCLUSÃO: A maioria dos pacientes tem conhecimento sobre a gravidade do trauma ocular e este tipo de lesão ocorre mesmo em locais com equipamentos de proteção disponíveis, alguns deles até durante o seu uso. Os dados sugerem que enfoque maior da prevenção deve ser na fiscalização e utilização de equipamentos adequados.PURPOSE: To evaluate the epidemiology of superficial corneal foreign body. METHODS: Patients who were seen at the Emergency Service of the Federal University of São Paulo, from April/05 to June/05, were screened and those with superficial corneal

  14. PENGEMBANGAN WANA WISATA WATU SUMONG SEBAGAI KAWASAN EKOWISATA BERBASIS POHON AREN DAN PEMBERDAYAAN MASYARAKAT SECARA BERKELANJUTAN DI DESA PERON, LIMBANGAN, KENDAL

    Directory of Open Access Journals (Sweden)

    Eram Tunggul Pawenang

    2015-12-01

    Full Text Available Tujuan dari kegiatan ini adalah untuk memperdalam pengertian, penghayatan, dan pengalaman mahasiswa tentang cara berfikir dan bekerja interdisipliner pada lintas sektoral yaitu bidang ilmu Kesehatan Masyarakat, Hukum dan Akuntansi Manajemen, kegunaan hasil pendidikan dan penelitian bagi pembangunan pada umumnya dan pembangunan daerah pedesaan khususnya Desa Peron dalam membudidayakan pohon aren dalam fungsi konservasi dan pemberdayaan hasil pengolahan aren sebagai fungsi produksi, bagi perguruan tinggi dapat mengembangkan IPTEKS yang lebih bermanfaat dalam pengelolaan dan penyelesaian berbagai masalah pembangunan. Masalah utama yang ada di Desa Peron adalah petani aren dalam pemasaran hasil masih tergantung dengan tengkulak, kurangnya diversifikasi dari aren menjadi produk-produk yang lain, pengemasan hasil diversifikasi olahan aren kurang menarik konsumen, pemanfaatan ijuk, akar dan daun dari pohon aren yang tidak maksimal, potensi Wisata Watu Sumong yang belum dieksplorasi secara optimal serta kurangnya pengetahuan masyarakat tentang pengolahan limbah aren. Hasil dari kegiatan KKN PPM meliputi Program pengemasan gula aren dilaksanakan dengan 3 variasi bentuk pengemasan yaitu Gula aren cetak, Gula Semut dan Sirup Aren dengan label “Arenku” dan sedang dalam proses permintaan no PIRT. Program pemasaran gula aren telah terlaksana yaitu dengan memasarkan produk gula aren berupa gula semut aren, gula cetak dan sirup aren di beberapa tempat yaitu di KPRI Handayani, UNSEC UNNES, dan Sekatul. Kegiatan Pengenalan Watu Sumong telah dilaksanakan dan mendapat apresiasi positif dari Bupati Kendal dan Dinas Kebudayaan dan Pariwisata Kendal dan akan dikembangkan menjadi Desa Wisata. Pengenalan juga dilaksanakan pada saat Peron Expo dengan menampilkan Video dan Pemasangan papan sejarah Watu Sumong dan Denah Lokasi Wisata di Desa Peron. Pengembangan desa Wisata akan dilanjutkan oleh Kelompok sadar wisata “Wikir Sari”. Program

  15. Superficial Epidermolytic Ichthyosis-Hypertrichosis as a Clue to Diagnosis.

    Science.gov (United States)

    Gameiro, Ana; Cabral, Rita; Moreno, Ana; Tellechea, Oscar

    2016-11-01

    Superficial epidermolytic ichthyosis (SEI) is an autosomal dominant disorder caused by a mutation in the keratin 2 gene and clinically characterized by mild hyperkeratosis, superficial blisters and shedding, referred to as the moulting phenomenon. We report a case of SEI in an 18-month-old girl presenting with marked hypertrichosis. Although not invariably present, we believe that hypertrichosis can be an important clue for diagnosis. © 2016 Wiley Periodicals, Inc.

  16. Imaging of the most frequent superficial soft-tissue sarcomas

    Energy Technology Data Exchange (ETDEWEB)

    Morel, Melanie; Taieb, Sophie; Ceugnart, Luc [Centre Oscar Lambret, Department of Radiology, Lille (France); Penel, Nicolas [Centre Oscar Lambret, Department of Oncology, Lille (France); Mortier, Laurent [Centre Hospitalier Universitaire de Lille, Department of Dermatology, Hopital Claude Huriez, Lille (France); Vanseymortier, Luc [Centre Oscar Lambret, Department of Surgery, Lille (France); Robin, Y.M. [Centre Oscar Lambret, Departement of Pathology, Lille (France); Gosset, Pierre [Groupement Hospitalier de l' Institut Catholique-Faculte Libre de Medecine de Lille, Department of Pathology, Hopital Saint-Philibert, Lomme (France); Cotten, Anne [Centre Hospitalier Universitaire de Lille, Department of Musculoskeletal Radiology, Centre Hopital Roger Salengro, Lille (France)

    2011-03-15

    Superficial soft-tissue sarcomas are malignant mesenchymal tumors located within the cutaneous and/or subcutaneous layers. Most superficial soft-tissue sarcomas are low-grade tumors; yet, the risk of local recurrence is high, and initial wide surgery is the main prognostic factor. Some of these superficial sarcomas may grow, following an infiltrative pattern, and their real extent may be underestimated clinically. Imaging techniques are useful to determine precisely the real margins of the tumor, especially in cases of clinically doubtful or recurrent or large superficial lesions. Imaging tools enable one to determine the relationship with the superficial fascia separating the subcutaneous layer from the underlying muscle. In our institution ultrasonographic examination is followed by magnetic resonance (MR) imaging when the size of the lesion exceeds 3-5 cm. Imaging assessment is performed prior to biopsy, enabling optimal surgical management. Imaging features of the main superficial sarcomas are detailed in the following article, according to their major locations: those arising in the epidermis and/or dermis, which are most often diagnosed by dermatologists, and the subcutaneous sarcomas. (orig.)

  17. Use of the term "superficial femoral vein" in ultrasound.

    Science.gov (United States)

    Thiagarajah, Ramya; Venkatanarasimha, Nanda; Freeman, Simon

    2011-01-01

    To determine the frequency of use of the term "superficial femoral vein" (SFV) in the radiologic reports from a sample of sonographic investigations for suspected deep vein thrombosis and to assess the potential for clinical error in their interpretation. Retrospective review of 425 consecutive reports from medical patients attending the Imaging Department over a 6-month period for the presence of the term "superficial femoral vein" and for the presence of thrombus. A questionnaire was sent to a sample of referring clinicians to assess their understanding of the anatomy of the deep venous system of the leg and indications for anticoagulant treatment. Of the 425 sonographic investigations reviewed, 90 (21.2%) used the term "superficial femoral vein," and 12 (13.3%) were positive for SFV thrombus. Among 87 clinicians, 74.7% believed the SFV to be part of the superficial venous system and that its thrombosis did not require anticoagulant treatment, although anticoagulation is now indicated in selected cases of superficial venous thrombosis. Seventy-five percent of clinicians do not recognize the SFV as being part of the deep venous system and that its thrombosis requires anticoagulant treatment. In this study, 13% of SFV examined were positive for thrombus, and four patients (4.4%) had an isolated SFV thrombus that could have been left untreated due to this misunderstanding. Use of the term "superficial femoral vein" is prone to misinterpretation by clinicians and potentially hazardous to patients. It should be replaced by "common femoral vein" and "femoral vein" in reports.

  18. Histopathological features of equine superficial, nonhealing, corneal ulcers.

    Science.gov (United States)

    Hempstead, Julie E; Clode, Alison B; Borst, Luke B; Gilger, Brian C

    2014-07-01

    To evaluate corneal changes associated with chronic, nonhealing, superficial, corneal ulcers in horses via common histopathological stains. Retrospective study. Twenty-four horses diagnosed with chronic, nonhealing, superficial, corneal ulceration. The medical records of horses evaluated at North Carolina State University's Veterinary Teaching Hospital (NCSU-VTH) from 2005 to 2011, diagnosed with a chronic, nonhealing, superficial, corneal ulcer and treated with superficial keratectomy (SK) were reviewed. Inclusion criteria were superficial corneal ulceration, no cellular infiltration via slit-lamp biomicroscopy, no microorganisms evident on corneal cytology, and acquisition of samples for aerobic bacterial and common fungal cultures. Corneal tissue samples were evaluated histopathologically for the presence or absence of a nonadherent epithelial 'lip', epithelial dysmaturity, intraepithelial inflammatory cells, an acellular hyaline zone in the anterior stroma, and stromal inflammatory cells, fibrosis and vascularization. In the majority of analyzed samples, epithelial cells adjacent to the ulcerated site showed nonadherence to the basement membrane and dysmaturity. Intraepithelial inflammatory cell infiltration was uncommon. Histopathological features of an anterior stromal hyaline zone, intrastromal inflammation, fibrosis and vascularization were variably present. The most consistent histopathological characteristics of equine chronic, nonhealing, superficial, corneal ulcers include epithelial nonadherence, epithelial dysmaturity and mild to moderate stromal inflammation; however, one set of histopathological characteristics does not definitively define this syndrome in horses. Additionally, the anterior stromal acellular hyaline zone commonly cited in canine spontaneous chronic corneal epithelial defects (SCCED) is not a consistent finding in equine corneas. © 2013 American College of Veterinary Ophthalmologists.

  19. Common Peroneal Nerve Palsy with Multiple-Ligament Knee Injury and Distal Avulsion of the Biceps Femoris Tendon

    Directory of Open Access Journals (Sweden)

    Takeshi Oshima

    2015-01-01

    Full Text Available A multiple-ligament knee injury that includes posterolateral corner (PLC disruption often causes palsy of the common peroneal nerve (CPN, which occurs in 44% of cases with PLC injury and biceps femoris tendon rupture or avulsion of the fibular head. Approximately half of these cases do not show functional recovery. This case report aims to present a criteria-based approach to the operation and postoperative management of CPN palsy that resulted from a multiple-ligament knee injury in a 22-year-old man that occurred during judo. We performed a two-staged surgery. The first stage was to repair the injuries to the PLC and biceps femoris. The second stage involved anterior cruciate ligament reconstruction. The outcomes were excellent, with a stable knee, excellent range of motion, and improvement in the palsy. The patient was able to return to judo competition 27 weeks after the injury. To the best of our knowledge, this is the first case report describing a return to sports following CPN palsy with multiple-ligament knee injury.

  20. Anomalous Cherenkov spin-orbit sound

    Science.gov (United States)

    Smirnov, Sergey

    2011-02-01

    The Cherenkov effect is a well-known phenomenon in the electrodynamics of fast charged particles passing through transparent media. If the particle is faster than the light in a given medium, the medium emits a forward light cone. This beautiful phenomenon has an acoustic counterpart where the role of photons is played by phonons and the role of the speed of light is played by the sound velocity. In this case the medium emits a forward sound cone. Here, we show that in a system with spin-orbit interactions in addition to this normal Cherenkov sound there appears an anomalous Cherenkov sound with forward and backward sound propagation. Furthermore, we demonstrate that the transition from the normal to anomalous Cherenkov sound happens in a singular way at the Cherenkov cone angle. The detection of this acoustic singularity therefore represents an alternative experimental tool for the measurement of the spin-orbit coupling strength.

  1. Anomalous feedback and negative domain wall resistance

    International Nuclear Information System (INIS)

    Cheng, Ran; Xiao, Di; Zhu, Jian-Gang

    2016-01-01

    Magnetic induction can be regarded as a negative feedback effect, where the motive-force opposes the change of magnetic flux that generates the motive-force. In artificial electromagnetics emerging from spintronics, however, this is not necessarily the case. By studying the current-induced domain wall dynamics in a cylindrical nanowire, we show that the spin motive-force exerting on electrons can either oppose or support the applied current that drives the domain wall. The switching into the anomalous feedback regime occurs when the strength of the dissipative torque β is about twice the value of the Gilbert damping constant α . The anomalous feedback manifests as a negative domain wall resistance, which has an analogy with the water turbine. (paper)

  2. Micro-instabilities and anomalous transport

    International Nuclear Information System (INIS)

    Connor, J.W.

    1992-01-01

    In order to optimise the design of a tokamak fusion reactor it is necessary to understand how the energy confinement time depends on the plasma and machine parameters. In principle the neo-classical theory provides this information but empirical evidence yields confinement times up to two orders of magnitude less than the predictions of this model. Experimental evidence of microscopic fluctuations in plasma density and other quantities suggests turbulent electro-magnetic fluctuations may be responsible for this anomalous transport. (Author)

  3. Anomalous Charge Transport in Disordered Organic Semiconductors

    International Nuclear Information System (INIS)

    Muniandy, S. V.; Woon, K. L.; Choo, K. Y.

    2011-01-01

    Anomalous charge carrier transport in disordered organic semiconductors is studied using fractional differential equations. The connection between index of fractional derivative and dispersion exponent is examined from the perspective of fractional Fokker-Planck equation and its link to the continuous time random walk formalism. The fractional model is used to describe the bi-scaling power-laws observed in the time-of flight photo-current transient data for two different types of organic semiconductors.

  4. Anomalous BRST Ward identity in string theory

    International Nuclear Information System (INIS)

    Demichev, A.P.; Iofa, M.Z.

    1990-01-01

    BRST transformations are studied in the path integral approach to string theory on Riemann surfaces of genus h≥2. The BRST Ward identity (WI) is shown to be anomalous, the anomaly being due to non-invariance of the functional integration domain under BRST transformations. The distinction between complete Lagrange BRST transformations including the metric and the auxiliary field and the commonly used 'truncated' BRST transformation is discussed in detail. The problem of decoupling of spurions from physical operators is investigated. (orig.)

  5. Anomalous diffusion of fermions in superlattices

    International Nuclear Information System (INIS)

    Drozdz, S.; Okolowicz, J.; Srokowski, T.; Ploszajczak, M.

    1996-03-01

    Diffusion of fermions in the periodic two-dimensional lattice of fermions is studied. It is shown that effects connected with antisymmetrization of the wave function increase chaoticness of motion. Various types of anomalous diffusion, characterized by a power spectral analysis are found. The nonlocality of the Pauli potential destroys cantori in the phase space. Consequently, the diffusion process is dominated by long free paths and the power spectrum is logarithmic at small frequency limit. (author)

  6. Anomalous Symmetry Fractionalization and Surface Topological Order

    Directory of Open Access Journals (Sweden)

    Xie Chen

    2015-10-01

    Full Text Available In addition to possessing fractional statistics, anyon excitations of a 2D topologically ordered state can realize symmetry in distinct ways, leading to a variety of symmetry-enriched topological (SET phases. While the symmetry fractionalization must be consistent with the fusion and braiding rules of the anyons, not all ostensibly consistent symmetry fractionalizations can be realized in 2D systems. Instead, certain “anomalous” SETs can only occur on the surface of a 3D symmetry-protected topological (SPT phase. In this paper, we describe a procedure for determining whether a SET of a discrete, on-site, unitary symmetry group G is anomalous or not. The basic idea is to gauge the symmetry and expose the anomaly as an obstruction to a consistent topological theory combining both the original anyons and the gauge fluxes. Utilizing a result of Etingof, Nikshych, and Ostrik, we point out that a class of obstructions is captured by the fourth cohomology group H^{4}(G,U(1, which also precisely labels the set of 3D SPT phases, with symmetry group G. An explicit procedure for calculating the cohomology data from a SET is given, with the corresponding physical intuition explained. We thus establish a general bulk-boundary correspondence between the anomalous SET and the 3D bulk SPT whose surface termination realizes it. We illustrate this idea using the chiral spin liquid [U(1_{2}] topological order with a reduced symmetry Z_{2}×Z_{2}⊂SO(3, which can act on the semion quasiparticle in an anomalous way. We construct exactly solved 3D SPT models realizing the anomalous surface terminations and demonstrate that they are nontrivial by computing three-loop braiding statistics. Possible extensions to antiunitary symmetries are also discussed.

  7. What's wrong with anomalous chiral gauge theory?

    International Nuclear Information System (INIS)

    Kieu, T.D.

    1994-05-01

    It is argued on general ground and demonstrated in the particular example of the Chiral Schwinger Model that there is nothing wrong with apparently anomalous chiral gauge theory. If quantised correctly, there should be no gauge anomaly and chiral gauge theory should be renormalisable and unitary, even in higher dimensions and with non-Abelian gauge groups. Furthermore, it is claimed that mass terms for gauge bosons and chiral fermions can be generated without spoiling the gauge invariance. 19 refs

  8. Frequency of superficial and deep vein thrombosis in patients with variations of superficial veins of lower extremities.

    Science.gov (United States)

    Lovic, Svetlana; Delic, Jasmin; Ljuca, Farid; Mujanovic, Emir; Custendil-Delic, Sunita; Zabic, Aida; Suljkanovic-Mahmutovic, Ahida

    2012-01-01

    Anatomical variations of veins often play a crucial role in formation of thrombotic changes in superficial and deep veins of lower extremities. THE AIM of this study was to determine the frequency of the dominant type of the lower extremity superficial veins, and to determine the eventual influence of such variations to the formation of superficial and deep vein thrombosis (DVT). The sample used in this study consisted of 180 patients subjected to ascedent contrast phlebography of lower extremities. The total sample was divided into following groups: patients with and without variations of the lower extremity superficial veins. Dominant type of the superficial veins (without variation) consisted of 97 patients (53.89%), while the rest of 83 patients showed some kind of anatomical variation (46.11%). The most frequent variation was the duplicated form ofv. saphena magna in 53.85%, while this procentage in women was 57.89%. Most frequent variations of duplicated v. saphena magna were: simple duplicated form, closed loop form, branching form and combined form. Topographical variation of saphenopopliteal junction besides fossa poplitea in the group of men showed procentage of 53.85%, while in the group of women that value accounted 63.16%. The percentage of varicose veins was more frequent in men and women without variations, but deep vein DVT showed higher frequency in patients with anatomical variations of superficial veins of lower extremities.

  9. Anomalous and resonance small-angle scattering

    International Nuclear Information System (INIS)

    Epperson, J.E.; Thiyagarajan, P.

    1988-01-01

    Significant changes in the small-angle scattered intensity can be induced by making measurements with radiation close to an absorption edge of an appropriate atomic species contained in the sample. These changes can be related quantitatively to the real and imaginary anomalous-dispersion terms for the scattering factor (X-rays) or scattering length (neutrons). The physics inherent in these anomalous-dispersion terms is first discussed before consideration of how they enter the relevant scattering theory. Two major areas of anomalous-scattering research have emerged; macromolecules in solution and unmixing of metallic alloys. Research in each area is reviewed, illustrating both the feasibility and potential of these techniques. All the experimental results reported to date have been obtained with X-rays. However, it is pointed out that the formalism is the same for the analog experiment with neutrons, and a number of suitable isotopes exist which exhibit resonance in an accessible range of energy. Potential applications of resonance small-angle neutron scattering are discussed. (orig.)

  10. Anomalous dissolution of metals and chemical corrosion

    Directory of Open Access Journals (Sweden)

    DRAGUTIN M. DRAZIC

    2005-03-01

    Full Text Available An overview is given of the anomalous behavior of some metals, in particular Fe and Cr, in acidic aqueous solutions during anodic dissolution. The anomaly is recognizable by the fact that during anodic dissolutionmore material dissolves than would be expected from the Faraday law with the use of the expected valence of the formed ions. Mechanical disintegration, gas bubble blocking, hydrogen embrittlement, passive layer cracking and other possible reasons for such behavior have been discussed. It was shown, as suggested by Kolotyrkin and coworkers, that the reason can be, also, the chemical reaction in which H2O molecules with the metal form metal ions and gaseous H2 in a potential independent process. It occurs simultaneously with the electrochemical corrosion process, but the electrochemical process controls the corrosion potential. On the example of Cr in acid solution itwas shown that the reason for the anomalous behavior is dominantly chemical dissolution, which is considerably faster than the electrochemical corrosion, and that the increasing temperature favors chemical reaction, while the other possible reasons for the anomalous behavior are of negligible effect. This effect is much smaller in the case of Fe, but exists. The possible role of the chemical dissolution reacton and hydrogen evolution during pitting of steels and Al and stress corrosion cracking or corrosion fatigue are discussed.

  11. Anomalous and resonance small angle scattering

    International Nuclear Information System (INIS)

    Epperson, J.E.; Thiyagarajan, P.

    1987-11-01

    Significant changes in the small angle scattered intensity can be induced by making measurements with radiation close to an absorption edge of an appropriate atomic species contained in the sample. These changes can be related quantitatively to the real and imaginary anomalous dispersion terms for the scattering factor (x-rays) or scattering length (neutrons). The physics inherent in these anomalous dispersion terms is first discussed before considering how they enter the relevant scattering theory. Two major areas of anomalous scattering research have emerged; macromolecules in solution and unmixing of metallic alloys. Research in each area is reviewed, illustrating both the feasibility and potential of these techniques. All the experimental results reported to date have been obtained with x-rays. However, it is pointed out that the formalism is the same or the analogue experiment with neutrons, and a number of suitable isotopes exist which exhibit resonance in an accessible range of energy. Potential applications of resonance small-angle neutron scatterings are discussed. 8 figs

  12. The Anomalous Magnetic Moment of the Muon

    CERN Document Server

    Jegerlehner, Friedrich

    2008-01-01

    This book reviews the present state of knowledge of the anomalous magnetic moment a=(g-2)/2 of the muon. The muon anomalous magnetic moment amy is one of the most precisely measured quantities in elementary particle physics and provides one of the most stringent tests of relativistic quantum field theory as a fundamental theoretical framework. It allows for an extremely precise check of the standard model of elementary particles and of its limitations. Recent experiments at the Brookhaven National Laboratory now reach the unbelievable precision of 0.5 parts per million, improving the accuracy of previous g-2 experiments at CERN by a factor of 14. A major part of the book is devoted to the theory of the anomalous magnetic moment and to estimates of the theoretical uncertainties. Quantum electrodynamics and electroweak and hadronic effects are reviewed. Since non-perturbative hadronic effects play a key role for the precision test, their evaluation is described in detail. After the overview of theory, the exper...

  13. Anomalous momentum transport from drift waves

    International Nuclear Information System (INIS)

    Dominguez, R.R.; Staebler, G.M.

    1993-01-01

    A sheared slab magnetic field model B = B 0 [z + (x/L s )y], with inhomogeneous flows in the y and z directions, is used to perform a fully-kinetic stability analysis of the ion temperature gradient (ITG) and dissipative trapped electron (DTE) modes. The concomitant quasilinear stress components that couple to the local perpendicular (y-component) and parallel (z-component) momentum transport are also calculated and the anomalous perpendicular and parallel viscous stresses obtained. A breakdown of the ITG-induced perpendicular viscous stress is generally observed at moderate values of the sheared perpendicular flow. The ITG-induced parallel viscous stress is generally larger and strongly dependent on the sheared flows. The DTE-induced perpendicular viscous stress may sometimes be negative, tending to cancel the ITG contributions while the DTE-induced parallel viscous stress is generally small. The effect of the perpendicular stress component in the momentum balance equations is generally small while the parallel stress component can dominate the usual neoclassical viscous stress terms. The dominant contribution to parallel viscous stress by the ITG mode suggests that bulk plasma toroidal momentum confinement, like energy confinement, is governed by an anomalous ion loss mechanism. Furthermore, the large anomalous effect suggests that the neoclassical explanation of poloidal flows in tokamaks may be incorrect. The present results are in general agreement with existing experimental observations on momentum transport in tokamaks

  14. Biochemical composition of the superficial layer of articular cartilage.

    Science.gov (United States)

    Crockett, R; Grubelnik, A; Roos, S; Dora, C; Born, W; Troxler, H

    2007-09-15

    To gain more information on the mechanism of lubrication in articular joints, the superficial layer of bovine articular cartilage was mechanically removed in a sheet of ice that formed on freezing the cartilage. Freeze-dried samples contained low concentrations of chondroitin sulphate and protein. Analysis of the protein by SDS PAGE showed that the composition of the sample was comparable to that of synovial fluid (SF). Attenuated total reflection infrared (ATR-IR) spectroscopy of the dried residue indicated that the sample contained mostly hyaluronan. Moreover, ATR-IR spectroscopy of the upper layer of the superficial layer, adsorbed onto silicon, showed the presence of phospholipids. A gel could be formed by mixing hyaluronan and phosphatidylcholine in water with mechanical properties similar to those of the superficial layer on cartilage. Much like the superficial layer of natural cartilage, the surface of this gel became hydrophobic on drying out. Thus, it is proposed that the superficial layer forms from hyaluronan and phospholipids, which associate by hydrophobic interactions between the alkyl chains of the phospholipids and the hydrophobic faces of the disaccharide units in hyaluronan. This layer is permeable to material from the SF and the cartilage, as shown by the presence of SF proteins and chondroitin sulphate. As the cartilage dries out after removal from the joint, the phospholipids migrate towards the surface of the superficial layer to reduce the surface tension. It is also proposed that the highly efficient lubrication in articular joints can, at least in part, be attributed to the ability of the superficial layer to adsorb and hold water on the cartilage surface, thus creating a highly viscous boundary protection. Copyright 2007 Wiley Periodicals, Inc.

  15. Major Superficial White Matter Abnormalities in Huntington's Disease

    Science.gov (United States)

    Phillips, Owen R.; Joshi, Shantanu H.; Squitieri, Ferdinando; Sanchez-Castaneda, Cristina; Narr, Katherine; Shattuck, David W.; Caltagirone, Carlo; Sabatini, Umberto; Di Paola, Margherita

    2016-01-01

    Background: The late myelinating superficial white matter at the juncture of the cortical gray and white matter comprising the intracortical myelin and short-range association fibers has not received attention in Huntington's disease. It is an area of the brain that is late myelinating and is sensitive to both normal aging and neurodegenerative disease effects. Therefore, it may be sensitive to Huntington's disease processes. Methods: Structural MRI data from 25 Pre-symptomatic subjects, 24 Huntington's disease patients and 49 healthy controls was run through a cortical pattern-matching program. The surface corresponding to the white matter directly below the cortical gray matter was then extracted. Individual subject's Diffusion Tensor Imaging (DTI) data was aligned to their structural MRI data. Diffusivity values along the white matter surface were then sampled at each vertex point. DTI measures with high spatial resolution across the superficial white matter surface were then analyzed with the General Linear Model to test for the effects of disease. Results: There was an overall increase in the axial and radial diffusivity across much of the superficial white matter (p superficial white matter even before symptoms are present in Huntington's disease. Since, the superficial white matter has a unique microstructure and function these abnormalities suggest it plays an important role in the disease. PMID:27242403

  16. Forces Required to Pull the Superficial Fascia in Facelifts.

    Science.gov (United States)

    Byun, Jin Suk; Hwang, Kun; Lee, Sang Yun; Song, Jae Min; Kim, Hun

    2018-02-01

    The aims of this study were to characterize the histology of the sideburn and cheek area and to measure the force required to pull the superficial fascia (SF) of Asians in facelift procedures. The hemiface of a formalin-fixed Korean male adult cadaver (77 years old) was used to study the histology of the sideburn and cheek area. In 42 patients during facelift procedures, the force needed to pull the overlying skin at the midpoint between the sideburn and nasolabial fold 2 mm was measured using a tensiometer. In the cheek, the superficial fatty layer of the superficial fascia (SFS) was found to maintain its thickness throughout the region between the dermis and the membranous layer of the superficial fascia (MSF). The MSF was continuous with the superficial temporal fascia (STF). In the sideburn, the MSF and parotid fascia closely adhered to each other. The force required to move the overlying skin 2 mm when pulling the MSF (10.27 ± 3.64 N) was more than twice as great (217%) as the force required when pulling the SFS (4.73 ± 2.15 N; P tension than MSF to move the overlying skin. In the cheek area, less tension is needed to move the overlying skin than in the sideburn area.

  17. Patterns in the management of superficial vein thrombosis.

    Science.gov (United States)

    Karathanos, Christos; Spanos, Konstantinos; Lachanas, Vasileios; Athanasoulas, Athanasios; Giannoukas, Athanasios D

    2017-04-01

    Objective To highlight current practice patterns in management of superficial vein thrombosis. Methods An electronic survey was conducted using the mailing lists of the Mediterranean League of Angiology and Vascular Surgery and European Venous Forum regarding superficial vein thrombosis diagnosis, investigation, and treatment. Results The response rate was 41% (175/430) and the majority of the participants were vascular surgeons practicing in a hospital. More experienced physicians considered superficial vein thrombosis as a medical issue of moderate seriousness and performed duplex ultrasound for confirmation of diagnosis. Elastic stockings were recommended by 87% of the physicians, while 57% prescribed nonsteroidal anti-inflammatory drugs. Eighty six percent advised anticoagulation, although a large disparity was shown regarding regime, dose, and duration. Thrombophilia test was regularly suggested by 19% of the physicians. Ligation of the saphenofemoral junction was the treatment of choice by those who suggested intervention in the acute phase of superficial vein thrombosis. Conclusions A great disparity exists in the management of superficial vein thrombosis. Current guidelines have not been adopted by physicians; more focused training is needed for those involved in the management of venous diseases.

  18. Degree of disability, pain levels, muscle strength, and electromyographic function in patients with Hansen's disease with common peroneal nerve damage.

    Science.gov (United States)

    Véras, Larissa Sales Téles; Vale, Rodrigo Gomesde Souza; Mello, Danielli Braga de; Castro, José Adail Fonseca de; Lima, Vicente; Silva, Kelson Nonato Gomes da; Trott, Alexis; Dantas, Estélio Henrique Martin

    2012-06-01

    This study evaluated the degree of disability, pain levels, muscle strength, and electromyographic function (RMS) in individuals with leprosy. We assessed 29 individuals with leprosy showing common peroneal nerve damage and grade 1 or 2 disability who were referred for physiotherapeutic treatment, as well as a control group of 19 healthy participants without leprosy. All subjects underwent analyses of degree of disability, electromyographic tests, voluntary muscle force, and the Visual Analog Pain Scale. McNemar's test found higher levels of grade 2 of disability (Δ = 75.9%; p = 0.0001) among individuals with leprosy. The Mann-Whitney test showed greater pain levels (Δ = 5.0; p = 0.0001) in patients with leprosy who had less extension strength in the right and left extensor hallucis longus muscles (Δ = 1.28, p = 0.0001; Δ = 1.55, p = 0.0001, respectively) and dorsiflexion of the right and left feet (Δ = 1.24, p = 0.0001; Δ = 1.45, p = 0.0001, respectively) than control subjects. The Kruskal-Wallis test showed that the RMS score for dorsiflexion of the right (Δ = 181.66 m·s-2, p = 0.001) and left (Δ = 102.57m·s-2, p = 0.002) feet was lower in patients with leprosy than in control subjects, but intragroup comparisons showed no difference. Leprosy had a negative influence on all of the study variables, indicating the need for immediate physiotherapeutic intervention in individuals with leprosy. This investigation opens perspectives for future studies that analyze leprosy treatment with physical therapeutic intervention.

  19. Degree of disability, pain levels, muscle strength, and electromyographic function in patients with Hansen's disease with common peroneal nerve damage

    Directory of Open Access Journals (Sweden)

    Larissa Sales Téles Véras

    2012-06-01

    Full Text Available INTRODUCTION: This study evaluated the degree of disability, pain levels, muscle strength, and electromyographic function (RMS in individuals with leprosy. METHODS: We assessed 29 individuals with leprosy showing common peroneal nerve damage and grade 1 or 2 disability who were referred for physiotherapeutic treatment, as well as a control group of 19 healthy participants without leprosy. All subjects underwent analyses of degree of disability, electromyographic tests, voluntary muscle force, and the Visual Analog Pain Scale. RESULTS: McNemar's test found higher levels of grade 2 of disability (Δ = 75.9%; p = 0.0001 among individuals with leprosy. The Mann-Whitney test showed greater pain levels (Δ = 5.0; p = 0.0001 in patients with leprosy who had less extension strength in the right and left extensor hallucis longus muscles (Δ = 1.28, p = 0.0001; Δ = 1.55, p = 0.0001, respectively and dorsiflexion of the right and left feet (Δ = 1.24, p = 0.0001; Δ = 1.45, p = 0.0001, respectively than control subjects. The Kruskal-Wallis test showed that the RMS score for dorsiflexion of the right (Δ = 181.66 m·s-2, p = 0.001 and left (Δ = 102.57m·s-2, p = 0.002 feet was lower in patients with leprosy than in control subjects, but intragroup comparisons showed no difference. CONCLUSIONS: Leprosy had a negative influence on all of the study variables, indicating the need for immediate physiotherapeutic intervention in individuals with leprosy. This investigation opens perspectives for future studies that analyze leprosy treatment with physical therapeutic intervention.

  20. Telemetered electromyography of peroneus longus in Varecia variegata and Eulemur rubriventer: implications for the functional significance of a large peroneal process.

    Science.gov (United States)

    Boyer, Doug M; Patel, Biren A; Larson, Susan G; Stern, Jack T

    2007-08-01

    A foot specialized for grasping small branches with a divergent opposable hallux (hallucal grasping) represents a key adaptive complex characterizing almost all arboreal non-human euprimates. Evolution of such grasping extremities probably allowed members of a lineage leading to the common ancestor of modern primates to access resources available in a small-branch niche, including angiosperm products and insects. A better understanding of the mechanisms by which euprimates use their feet to grasp will help clarify the functional significance of morphological differences between the euprimate grasp complex and features representing specialized grasping in other distantly related groups (e.g., marsupials and carnivorans) and in closely related fossil taxa (e.g., plesiadapiforms). In particular, among specialized graspers euprimates are uniquely characterized by a large peroneal process on the base of the first metatarsal, but the functional significance of this trait is poorly understood. We tested the hypothesis that the large size of the peroneal process corresponds to the pull of the attaching peroneus longus muscle recruited to adduct the hallux during grasping. Using telemetered electromyography on three individuals of Varecia variegata and two of Eulemur rubriventer, we found that peroneus longus does not generally exhibit activity consistent with an important function in hallucal grasping. Instead, extrinsic digital flexor muscles and, sometimes, the intrinsic adductor hallucis are active in ways that indicate a function in grasping with the hallux. Peroneus longus helps evert the foot and resists its inversion. We conclude that the large peroneal tuberosity that characterizes the hallucal metatarsal of prosimian euprimates does not correlate to "powerful" grasping with a divergent hallux in general, and cannot specifically be strongly linked to vertical clinging and climbing on small-diameter supports. Thus, the functional significance of this hallmark

  1. [Superficial vascular anomalies of the face: apropos of six cases].

    Science.gov (United States)

    El Kohen, A; Benjelloun, A; El Quessar, A; El Hassani, M R; Benchekroun, L; Lazrak, A; Jazouli, M; Kzadri, N

    2003-12-01

    The classification of superficial vascular anomalies of the face recognizes two major categories: hemangiomas and vascular malformations. A multidisciplinary approach to these malformations is necessary. MRI of venous vascular malformations, pulsed Doppler and arteriography of arteriovenous malformations are key examinations in the exploration strategy for superficial vascular malformations. Hemangiomas always regress. Surgery is generally needed only for late sequelae although in some cases early surgery is beneficial. Percutaneous sclerotherapy and surgery are indicated for venous malformations in order to minimize or improve skin, muscle and bone distorsions. Arteriovenous malformations are the most dangerous vascular anomalies of the face. Superselective arterial embolization prepares the surgical excision of the nidus, complete resection is essential. We review 6 cases of superficial vascular malformations of the face treated surgically and discuss the diagnosis features and the treatment modalities of these vascular anomalies.

  2. Pigmented basal cell carcinoma mimicking a superficial spreading melanoma

    Directory of Open Access Journals (Sweden)

    Paula Hasbún Acuña

    2016-12-01

    Full Text Available Resumen El carcinoma basocelular es el cáncer de piel más frecuente, especialmente en personas de edad avanzada. El carcinoma basocelular pigmentado es una variante poco común que se ha descrito en la literatura como una lesión nodular hiperpigmentada. En raras ocasiones puede presentarse en forma de una extensa placa pigmentada, la cual puede ser clínicamente indistinguible del melanoma maligno de extensión superficial y de la enfermedad de Bowen. La dermatoscopía tiene una alta sensibilidad en el diagnóstico del carcinoma basocelular, cuando se utilizan los criterios de Menzies, aunque el diagnóstico final es histopatológico. El objetivo del presente trabajo es reportar y analizar el caso de una paciente con un extenso carcinoma basocelular superficial pigmentado, que simula un melanoma maligno de extensión superficial.

  3. ttH anomalous coupling in double Higgs production

    Energy Technology Data Exchange (ETDEWEB)

    Nishiwaki, Kenji; Niyogi, Saurabh; Shivaji, Ambresh [Regional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute,Chhatnag Road, Junsi, Allahabad-211019 (India)

    2014-04-02

    We study the effects of top-Higgs anomalous coupling in the production of a pair of Higgs boson via gluon fusion at the Large Hadron Collider (LHC). The introduction of anomalous ttH coupling can alter the hadronic double Higgs boson cross section and can lead to characteristic changes in certain kinematic distributions. We perform a global analysis based on available LHC data on the Higgs to constrain the parameters of ttH anomalous coupling. Possible overlap of the predictions due to anomalous ttH coupling with those due to anomalous trilinear Higgs coupling is also studied. We briefly discuss the effect of the anomalous ttH coupling on the HZ production via gluon fusion which is one of the main backgrounds in the HH→γγbb-macron channel.

  4. Contemporary Use of Anomalous Diffraction in Biomolecular Structure Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Liu Q.; Hendrickson, W.

    2017-01-01

    The normal elastic X-ray scattering that depends only on electron density can be modulated by an ?anomalous? component due to resonance between X-rays and electronic orbitals. Anomalous scattering thereby precisely identifies atomic species, since orbitals distinguish atomic elements, which enables the multi- and single-wavelength anomalous diffraction (MAD and SAD) methods. SAD now predominates in de novo structure determination of biological macromolecules, and we focus here on the prevailing SAD method. We describe the anomalous phasing theory and the periodic table of phasing elements that are available for SAD experiments, differentiating between those readily accessible for at-resonance experiments and those that can be effective away from an edge. We describe procedures for present-day SAD phasing experiments and we discuss optimization of anomalous signals for challenging applications. We also describe methods for using anomalous signals as molecular markers for tracing and element identification. Emerging developments and perspectives are discussed in brief.

  5. Scaling theory for anomalous semiclassical quantum transport

    Science.gov (United States)

    Sena-Junior, M. I.; Macêdo, A. M. S.

    2016-01-01

    Quantum transport through devices coupled to electron reservoirs can be described in terms of the full counting statistics (FCS) of charge transfer. Transport observables, such as conductance and shot-noise power are just cumulants of FCS and can be obtained from the sample's average density of transmission eigenvalues, which in turn can be obtained from a finite element representation of the saddle-point equation of the Keldysh (or supersymmetric) nonlinear sigma model, known as quantum circuit theory. Normal universal metallic behavior in the semiclassical regime is controlled by the presence of a Fabry-Pérot singularity in the average density of transmission eigenvalues. We present general conditions for the suppression of Fabry-Pérot modes in the semiclassical regime in a sample of arbitrary shape, a disordered conductor or a network of ballistic quantum dots, which leads to an anomalous metallic phase. Through a double-scaling limit, we derive a scaling equation for anomalous metallic transport, in the form of a nonlinear differential equation, which generalizes the ballistic-diffusive scaling equation of a normal metal. The two-parameter stationary solution of our scaling equation generalizes Dorokhov's universal single-parameter distribution of transmission eigenvalues. We provide a simple interpretation of the stationary solution using a thermodynamic analogy with a spin-glass system. As an application, we consider a system formed by a diffusive wire coupled via a barrier to normal-superconductor reservoirs. We observe anomalous reflectionless tunneling, when all perfectly transmitting channels are suppressed, which cannot be explained by the usual mechanism of disorder-induced opening of tunneling channels.

  6. Irmandade afetada pela atrofia muscular peroneal de Charcot-Marie-Tooth com possível variante do fenômeno da antecipação

    Directory of Open Access Journals (Sweden)

    Aguinaldo Gonçalves

    1977-06-01

    Full Text Available Considerando-se a peculiaridade genética da atrofia peroneal de Charcot-Marie-Tooth, é feita a descrição clínica de família com três irmãos afetados, com idade de aparecimento progressivamente antecipada, refletindo possível variante do fenômeno da antecipação, condição inusitada na literatura, não só para esta doença, mas também, de modo geral, em Genética Humana.

  7. Anomalous atomic volume of alpha-Pu

    DEFF Research Database (Denmark)

    Kollar, J.; Vitos, Levente; Skriver, Hans Lomholt

    1997-01-01

    We have performed full charge-density calculations for the equilibrium atomic volumes of the alpha-phase light actinide metals using the local density approximation (LDA) and the generalized gradient approximation (GGA). The average deviation between the experimental and the GGA atomic radii is 1.......3%. The comparison between the LDA and GGA results show that the anomalously large atomic volume of alpha-Pu relative to alpha-Np can be ascribed to exchange-correlation effects connected with the presence of low coordinated sites in the structure where the f electrons are close to the onset of localization...

  8. Anomalous Cepheids and population II blue stragglers

    Science.gov (United States)

    Nemec, James M.

    Recent studies of anomalous Cepheids (ACs) and population II blue stragglers (BSs), including photometrically variable BSs (VBSs), are reviewed. The VBSs represent about 25 percent of the BSs, the majority of which are SX Phe short-period variables in the Cepheid instability strip. Mass estimates derived using various techniques suggest that both ACs and BSs are relatively massive (about 1.0-1.6 solar mass). The recent discovery that two BSs in the globular cluster NGC 5466 are contact binaries, and the earlier discovery that one of the BSs in Omega Cen is an eclipsing binary, provide direct evidence that at least some BSs are binary systems.

  9. Observations of anomalous fading in maiolica

    International Nuclear Information System (INIS)

    Bowman, S.G.E.

    1988-01-01

    In the course of an authenticity study on Italian maiolica (tin-glazed earthenware of the Renaissance period), storage at elevated temperature was used to accelerate anomalous fading. Substantial levels of fading were observed in about half of the samples, and in these cases the variation of fading with glow curve temperature accounted for the lack of an equivalent dose plateau. Some evidence was found for a difference in the fading between alpha and beta induced thermoluminescence (TL). More importantly, some samples with unstable natural TL were found: the implications of this for dating and the circumvention of fading are discussed. (author)

  10. The anomalous magnetic moment of the muon

    CERN Document Server

    Hughes, V W; Earle, W; Efstathiadis, E F; Hare, M; Hazen, E S; Krienen, F; Miller, J P; Rind, O; Roberts, B L; Sulak, Lawrence R; Trofimov, A V; Brown, H N; Bunce, G M; Danby, G T; Larsen, R; Lee, Y Y; Meng, W; Mi, J L; Morse, W M; Pai, C; Prigl, R; Sanders, R; Semertzidis, Y K; Tanaka, M; Warburton, D; Orlov, Yu F; Winn, D; Grossmann, A; Jungmann, Klaus; zu Putlitz, Gisbert; Debevec, P T; Deninger, W; Hertzog, D W; Polly, C; Sedykh, S; Urner, D; Haeberlen, U; Cushman, P B; Duong, L; Giron, S; Kindem, J; McNabb, R; Miller, D; Timmermans, C; Zimmerman, D; Druzhinin, V P; Fedotovich, G V; Khazin, B I; Logashenko, I B; Ryskulov, N M; Serednyakov, S I; Shatunov, Yu M; Solodov, E P; Yamamoto, A; Iwasaki, M; Kawamura, M; Deng, H; Dhawan, S K; Farley, Francis J M; Grosse-Perdekamp, M; Hughes, V W; Kawall, D; Redin, S I; Steinmetz, A

    1998-01-01

    A new experiment is underway at Brookhaven National Laboratory to measure the g-2 value of the muon to a precision of 0.35 ppm, which would improve our present knowledge by a factor of 20. In its initial run the muon anomalous g-value was found to be a/sub mu //sup + /=1165925(15)*10/sup -9/ [13 ppm], in good agreement with the previous CERN measurements and with approximately the same uncertainty. The current scientific motivations for this experiment are discussed, and the experiment is described. (30 refs).

  11. Global constraints on top quark anomalous couplings

    Science.gov (United States)

    Déliot, Frédéric; Faria, Ricardo; Fiolhais, Miguel C. N.; Lagarelhos, Pedro; Onofre, António; Pease, Christopher M.; Vasconcelos, Ana

    2018-01-01

    The latest results on top quark physics, namely single top quark production cross sections, W -boson helicity and asymmetry measurements are used to probe the Lorentz structure of the W t b vertex. The increase of sensitivity to new anomalous physics contributions to the top quark sector of the standard model is quantified by combining the relevant results from Tevatron and the Large Hadron Collider. The results show that combining an increasing set of available precision measurements in the search for new physics phenomena beyond the standard model leads to significant sensitivity improvements, especially when compared with the current expectation for the High Luminosity run at the LHC.

  12. The anomalous magnetic moment of the muon

    International Nuclear Information System (INIS)

    Farley, F.J.M.

    1975-01-01

    A historical survey of the measurements of the gyromagnetic ratio g of the muon. A brief introduction is given to the theory of the 'anomalous magnetic moment' a equivalent to 1/2(g-2) and its significance is explained. The main part of the review concerns the successive (g-2) experiments to measure a directly, with gradually increasing accuracy. At present experiment and theory agree to (13+-29) parts in 10 9 in g, and the muon still obeys the rules of quantum electrodynamics for a structureless point charge. (author)

  13. Presentation: 3D magnetic inversion by planting anomalous densities

    OpenAIRE

    Uieda, Leonardo; Barbosa, Valeria C. F.

    2013-01-01

    Slides for the presentation "3D magnetic inversion by planting anomalous densities" given at the 2013 AGU Meeting of the Americas in Cancun, Mexico.   Note: There was an error in the title of the talk. The correct title should be "3D magnetic inversion by planting anomalous magnetization"   Abstract: We present a new 3D magnetic inversion algorithm based on the computationally efficient method of planting anomalous densities. The algorithm consists of an iterative growth of the an...

  14. Inclusive anomalous muon production in e+e- annihilation

    International Nuclear Information System (INIS)

    Feldman, G.J.; Bulos, F.; Lueke, D.; Abrams, G.S.; Alam, M.S.; Boyarski, A.M.; Breidenbach, M.; Dorfan, J.; Friedberg, C.E.; Fryberger, D.; Goldhaber, G.; Hanson, G.; Heile, F.B.; Jaros, J.A.; Kadyk, J.A.; Larsen, R.R.; Litke, A.M.; Lueth, V.; Madaras, R.J.; Morehouse, C.C.; Nguyen, H.K.; Paterson, J.M.; Perl, M.L.; Peruzzi, I.; Piccolo, M.; Pierre, F.M.; Pun, T.P.; Rapidis, P.; Richter, B.; Sadoulet, B.; Schwitters, R.F.; Tanenbaum, W.; Trilling, G.H.; Vannucci, F.; Whitaker, J.S.; Wiss, J.E.

    1977-01-01

    We present measurements of inclusive anomalous muon production in e + e - annihilations in three energy ranges. In all three ranges we observe a large anomalous muon production rate in two-prong events which is compatible with the expected decays of pairs of heavy leptons. In the highest energy range there is also appreciable anomalous muon production in multiprong events which, due to its magnitude and momentum dependence, must come in part from a source other than a heavy lepton

  15. Update on therapy for superficial mycoses: review article part I*

    Science.gov (United States)

    Dias, Maria Fernanda Reis Gavazzoni; Quaresma-Santos, Maria Victória Pinto; Bernardes-Filho, Fred; Amorim, Adriana Gutstein da Fonseca; Schechtman, Regina Casz; Azulay, David Rubem

    2013-01-01

    Superficial fungal infections of the hair, skin and nails are a major cause of morbidity in the world. Choosing the right treatment is not always simple because of the possibility of drug interactions and side effects. The first part of the article discusses the main treatments for superficial mycoses - keratophytoses, dermatophytosis, candidiasis, with a practical approach to the most commonly-used topical and systemic drugs , referring also to their dosage and duration of use. Promising new, antifungal therapeutic alternatives are also highlighted, as well as available options on the Brazilian and world markets. PMID:24173183

  16. Evaporative Water Loss in Superficial to Full Thickness Burns.

    Science.gov (United States)

    Busche, Marc Nicolai; Roettger, Anne; Herold, Christian; Vogt, Peter Maria; Rennekampff, Hans-Oliver

    2016-10-01

    Increased evaporative water loss (EWL) in burn patients leads to dehydration and hypothermia. Early clinical studies performed with outdated hygrometers suggested a 17 to 75 times increased EWL in burns with contradicting results for the different burn depths.Our study proposals were: (1) obtain reliable data of the EWL of all burn depths, (2) compare these results with findings from earlier studies, (3) evaluate the usefulness of the EWL in differentiating between superficial and deep partial thickness burns, (4) determine the effect of Biobrane on the EWL of superficial partial thickness burns in vivo, and (5) evaluate the effect of the sterile incision foil Opraflex on the EWL in split skin graft donor sites. We measured the EWL of all burn depths in 28 patients under stable and recorded conditions regarding room temperature and humidity with a modern digital evaporimeter (Tewameter TM 300). For the first time in vivo, we also determined the effect of Biobrane on the EWL of burns and evaluated the EWL in split skin graft donor sites covered with Opraflex. The EWL in all burn depths was significantly increased (P 0.05) in the EWL of superficial compared with deep partial thickness burns, whereas full thickness burns had a significantly lower EWL (P < 0.05) compared with superficial and deep partial thickness burns. Biobrane significantly reduced the EWL (P < 0.05) of superficial partial thickness burns. The EWL of Opraflex covered skin graft donor sites was significantly reduced compared with uncovered donor sites (P < 0.05). Our data suggest that the actual EWL in burns is approximately 3 times higher in full thickness burns and approximately 4 times higher in superficial and deep partial thickness burns compared with normal skin and therefore much lower than suggested previously.Because there was no significant difference in the EWL of superficial compared with deep partial thickness burns, the EWL cannot be used to differentiate between these burn depths

  17. Superficial hardened layer of cut surface by turning

    Directory of Open Access Journals (Sweden)

    Croitoru Sorin Mihai

    2017-01-01

    Full Text Available One of research methods in metal cutting process is to measure hardness in the contact zone between cutting tool and workpiece. The objective of the performed research was to determine thickness and hardness of the superficial layer of cut surface due to cutting process, both orthogonal and complex cutting. The most important finding was that thickness of the superficial hardened layer is very thin under considered conditions, less than 0.01 … 0.02 mm. This research should be continued.

  18. Pigmented basal cell carcinoma mimicking a superficial spreading melanoma.

    Science.gov (United States)

    Hasbún Acuña, Paula; Cullen Aravena, Roberto; Maturana Donaire, César; Ares Mora, Raúl; Porras Kusmanic, Ninoska

    2016-12-20

    Basal cell carcinoma is the most common form of skin cancer, especially in elderly people. Pigmented basal cell carcinoma is a rare subtype and has been described in the literature as a nodular and hyperpigmented lesion; rarely, it can appear as an extensive pigmented plate, which may be clinically indistinguishable from superficial spreading melanoma and Bowen disease. Dermatoscopy has a high sensitivity in the diagnosis of basal cell carcinoma. When Menzies criteria are used; however, the final diagnosis is made by histopathology. The objective of the present report is to analyze the case of a patient with pigmented basal cell carcinoma simulating a superficial spreading melanoma.

  19. Principios básicos del riego por superficie

    OpenAIRE

    Faci González, José María; Playán Jubillar, Enrique; Playán Jubillar, Enrique

    1994-01-01

    El riego por superficie incluye una variedad de tipos de riego que tienen la característica comúnn de que el agua se aplica en la superficie del suelo y se distribuye en el campo por gravedad, de modo que el caudal de riego disminuye a lo largo del campo debido a la infiltración del terreno. El hecho de que la fuerza de la gravedad realice la distribución del agua hace que no sea necesario disponer de complejas estructuras de distribución de agua cubriendo la parcela a regar, como las tub...

  20. Elucidation of the mechanism for anomalous blueshift

    International Nuclear Information System (INIS)

    Kotaki, Hideyuki; Kando, Masaki; Koga, J.K.; Nakajima, Kazuhisa

    2004-01-01

    The anomalous blue shift of high intensity laser which was discovered by the present authors occurs in the process of gas ionization accompanied with the self-focusing. This shift does not depend either on the laser power or on the gas density and all photons are shifted by a certain frequency, while the one which has been known in common depends on both the intensity and density and only some part of the laser photons is shifted. In order to elucidate this phenomenon, the occurrence conditions of the anomalous blue shift were investigated and the results are compared with theory. The shifts were measured by focusing the laser beam in the gas-filled chamber with an off-axis-parabolic mirror and with a convex lens. When the reflective lens was used the amount of the shift depended significantly on the ionization rate of the plasma, while it depended on the pulse width when the transmission lens was used indicating that the shift is determined by the valence due to the ionization at the focusing point. (S. Funahashi)

  1. Discovering anomalous events from urban informatics data

    Science.gov (United States)

    Jayarajah, Kasthuri; Subbaraju, Vigneshwaran; Weerakoon, Dulanga; Misra, Archan; Tam, La Thanh; Athaide, Noel

    2017-05-01

    Singapore's "smart city" agenda is driving the government to provide public access to a broader variety of urban informatics sources, such as images from traffic cameras and information about buses servicing different bus stops. Such informatics data serves as probes of evolving conditions at different spatiotemporal scales. This paper explores how such multi-modal informatics data can be used to establish the normal operating conditions at different city locations, and then apply appropriate outlier-based analysis techniques to identify anomalous events at these selected locations. We will introduce the overall architecture of sociophysical analytics, where such infrastructural data sources can be combined with social media analytics to not only detect such anomalous events, but also localize and explain them. Using the annual Formula-1 race as our candidate event, we demonstrate a key difference between the discriminative capabilities of different sensing modes: while social media streams provide discriminative signals during or prior to the occurrence of such an event, urban informatics data can often reveal patterns that have higher persistence, including before and after the event. In particular, we shall demonstrate how combining data from (i) publicly available Tweets, (ii) crowd levels aboard buses, and (iii) traffic cameras can help identify the Formula-1 driven anomalies, across different spatiotemporal boundaries.

  2. Ultrasonic Detection of Anomalous Machining Damage

    Science.gov (United States)

    Margetan, F. J.; Enyart, Darrel; Thompson, R. B.

    2009-03-01

    During manufacture, rotating jet-engine components are shaped into their final configurations by machining operations which may include turning, drilling and broaching. Anomalous machining conditions, such as a loss of lubricant or a damaged cutting tool, can result in an altered near-surface microstructure, shortening the useful life of the component. In this paper we report on preliminary attempts to detect anomalous machining damage using ultrasonic surface acoustic waves (SAWs). Two pulse/echo immersion setups are considered: normal-incidence acoustic microscopy (Method 1); and oblique-incidence SAW backscatter (Method 2). Each method is applied to pairs of Ti 6-4 turned coupons, one manufactured using accepted best practices; and one purposely damaged using abusive machining conditions. Representative results are presented for each method. Method 1 is very sensitive to changes in surface topology; thus near-surface damage that is accompanied by surface topology changes can be readily detected. For detecting microstructural damage in the absence of topology changes, Method 2 is preferable. In Method 2 the transducer tilt angle is found which results in the maximum backscattered SAW "noise." This angle is dependent on the effective surface wave speed, which in turn is influenced by the near-surface microstructure. For a set twenty Ti 6-4 turned coupons, Method 2 was generally able to distinguish damaged from undamaged surfaces.

  3. Anomalous Dispersion in a Sand Bed River

    Science.gov (United States)

    Bradley, D. N.; Tucker, G. E.; Benson, D. M.

    2009-04-01

    There has been a recent surge of interest in non-local, heavy-tailed models of sediment transport and dispersion that are governed by fractional order differential equations. These models have a firm mathematical foundation and have been successfully applied in a variety of transport systems, but their use in geomorphology has been minimal because the data required to validate the models is difficult to acquire. We use data from a nearly 50-year-old tracer experiment to test a fluvial bed load transport model with a two unique features. First, the model uses a heavy-tailed particle velocity distribution with a divergent second moment to reproduce the anomalously high fraction of tracer mass observed in the downstream tail of the spatial distribution. Second, the model partitions mass into a detectable mobile phase and an undetectable, immobile phase. This two-phase transport model predicts two other features observed in the data: a decrease in the amount of detected tracer mass over the course of the experiment and the high initial velocity of the tracer plume. Because our model uses a heavy-tailed velocity distribution with a divergent second moment it is non-local and non-Fickian and able to reproduce aspects of the data that a local, Fickian model cannot. The model's successful prediction of the observed concentration profiles provides some of the first evidence of anomalous dispersion of bed load in a natural river.

  4. Anomalous Micellization of Pluronic Block Copolymers

    Science.gov (United States)

    Leonardi, Amanda; Ryu, Chang Y.

    2014-03-01

    Poly(ethylene oxide) - poly(propylene oxide) - poly(ethylene oxide) (PEO-PPO-PEO) block copolymers, commercially known as Pluronics, are a unique family of amphiphilic triblock polymers, which self-assemble into micelles in aqueous solution. These copolymers have shown promise in therapeutic, biomedical, cosmetic, and nanotech applications. As-received samples of Pluronics contain low molecular weight impurities (introduced during the manufacturing and processing), that are ignored in most applications. It has been observed, however, that in semi-dilute aqueous solutions, at concentrations above 1 wt%, the temperature dependent micellization behavior of the Pluronics is altered. Anomalous behavior includes a shift of the critical micellization temperature and formation of large aggregates at intermediate temperatures before stable sized micelles form. We attribute this behavior to the low molecular weight impurities that are inherent to the Pluronics which interfere with the micellization process. Through the use of Dynamic Light Scattering and HPLC, we compared the anomalous behavior of different Pluronics of different impurity levels to their purified counterparts.

  5. Powder diffraction studies using anomalous dispersion

    International Nuclear Information System (INIS)

    Cox, D.E.; Wilkinson, A.P.

    1993-01-01

    With the increasing availability and accessibility of high resolution powder diffractometers at many synchrotron radiation sources throughout the world, there is rapidly-growing interest in the exploitation of anomalous dispersion techniques for structural studies of polycrystalline materials. In conjunction with the Rietveld profile method for structure refinement, such studies are especially useful for the determination of the site distributions of two or more atoms which are near neighbors in the periodic table, or atoms which are distributed among partially occupied sites. Additionally, it is possible to (1) determine the mean-square displacements associated with different kinds of atoms distributed over a single set of sites, (2) distinguish between different oxidation states and coordination geometries of a particular atom in a compound and (3) to determine f' for a wide range of atomic species as a function of energy in the vicinity of an absorption edge. Experimental methods for making anomalous dispersion measurements are described in some detail, including data collection strategies, data analysis and correlation problems, possible systematic errors, and the accuracy of the results. Recent work in the field is reviewed, including cation site-distribution studies (e.g. doped high T c superconductors, ternary alloys, FeCo 2 (PO 4 ) 3 , FeNi 2 BO 5 ), oxidation-state contrast (e.g. YBa 2 Cu 3 O 6+x , Eu 3 O 4 , GaCl 2 , Fe 2 PO 5 ), and the effect of coordination geometry (e.g. Y 3 Ga 5 O l2 )

  6. Revisit to diffraction anomalous fine structure

    International Nuclear Information System (INIS)

    Kawaguchi, T.; Fukuda, K.; Tokuda, K.; Shimada, K.; Ichitsubo, T.; Oishi, M.; Mizuki, J.; Matsubara, E.

    2014-01-01

    The diffraction anomalous fine structure method has been revisited by applying this measurement technique to polycrystalline samples and using an analytical method with the logarithmic dispersion relation. The diffraction anomalous fine structure (DAFS) method that is a spectroscopic analysis combined with resonant X-ray diffraction enables the determination of the valence state and local structure of a selected element at a specific crystalline site and/or phase. This method has been improved by using a polycrystalline sample, channel-cut monochromator optics with an undulator synchrotron radiation source, an area detector and direct determination of resonant terms with a logarithmic dispersion relation. This study makes the DAFS method more convenient and saves a large amount of measurement time in comparison with the conventional DAFS method with a single crystal. The improved DAFS method has been applied to some model samples, Ni foil and Fe 3 O 4 powder, to demonstrate the validity of the measurement and the analysis of the present DAFS method

  7. Anomalous Stars and Where to Find Them

    Science.gov (United States)

    Muna, Demitri; Huff, Eric

    2018-01-01

    The sky is now extensively mapped by imaging surveys in wavelengths that span the electromagnetic spectrum, ranging from Fermi and GALEX down to WISE, Planck, and radio surveys like FIRST and VLSS. Individual public catalogs now contain on order hundreds of millions of distinct sources. Recent progress in image analysis techniques makes possible great increases in the efficiency, sensitivity, and reliability of measurements that combine imaging data from multiple probes with heterogeneous properties. This is especially true for the identification of anomalous sources: traditional methods for finding ‘outliers’ typically rely on making hard cuts on noisy catalog properties, greatly restricting the potential discovery space. Cross-catalog matches confine investigation to objects that occur at signal-to-noise ratios sufficient to be independently detectable in a subset of all the available multi-wavelength coverage. The process of merging the latest analyses with existing data is severely hampered, however, by the fractured way in which these data are processed and stored, limitations of data access, the data volume involved, and the computation power required. This has left archive data far from fully exploited. Stellar anomalies present the best place to start: joint distributions of stellar colors and magnitudes have finer structures than extended sources, and modelling of point sources is computationally cheaper than for galaxies. We present a framework to solve the problem of applying new algorithms to old data while overcoming the limitations described above, in the search for the undiscovered anomalous.

  8. The Superficial White Matter in Alzheimer’s Disease

    Science.gov (United States)

    Phillips, Owen; Joshi, Shantanu H.; Piras, Fabrizio; Orfei, Maria Donata; Iorio, Mariangela; Narr, Katherine L.; Shattuck, David W.; Caltagirone, Carlo; Spalletta, Gianfranco; Paola, Margherita Di

    2016-01-01

    White matter abnormalities have been shown in the large deep fibers of Alzheimer’s disease patients. However, the late myelinating superficial white matter comprised of intracortical myelin and short-range association fibers has not received much attention. In order to investigate this area, we extracted a surface corresponding to the superficial white matter beneath the cortex, and then applied a cortical pattern-matching approach which allowed us to register and subsequently sample diffusivity along thousands of points at the interface between the gray matter and white matter in 44 patients with Alzheimer’s disease (Age: 71.02±5.84, 16M/28F) and 47 healthy controls (Age 69.23±4.45, 19M/28F). In patients we found an overall increase in the axial and radial diffusivity across most of the superficial white matter (p superficial white matter has a unique microstructure and is critical for the integration of multimodal information and during brain maturation and aging. Here we show that there are major abnormalities in patients and the deterioration of these fibers relates to clinical symptoms in Alzheimer’s disease. PMID:26801955

  9. A review of the ultrastructural features of superficial candidiasis.

    Science.gov (United States)

    Jayatilake, J A M S

    2011-04-01

    Commensal yeast Candida causes opportunistic infections ranging from superficial lesions to disseminated mycoses in compromised patients. Superficial candidiasis, the commonest form of candidal infections, primarily affects the mucosa and the skin where Candida lives as a commensal. Conversion of candidal commensalism into opportunism at the fungal-epithelial interface is still ill-defined. Nevertheless, fungal virulence mechanisms such as adhesion to epithelia, morphogenesis, production of secretory hydrolytic enzymes, and phenotypic switching are thought to contribute in the process of pathogenesis. On the other hand, host responses in terms of immunity and local epithelial responses are actively involved in resisting the fungal challenge at the advancing front of the infection. Ultrastructural investigations using electron microscopy along with immunohistochemistry, cytochemistry, etc. have helped better viewing of Candida-host interactions. Thus, studies on the ultrastructure of superficial candidiasis have revealed a number of fungal behaviors and associated host responses such as adhesion, morphogenesis (hyphae and appresoria formation), thigmotropism, production and distribution of extracellular enzymes, phagocytosis, and epithelial changes. The purpose of this review is to sum up most of the ultrastructural findings of Candida-host interactions and to delineate the important pathological processes underlying superficial candidiasis.

  10. Superficial skin infections and the use of topical and systemic ...

    African Journals Online (AJOL)

    Superficial bacterial infections of the skin are very common. With the increasing burden of human immunodeficiency virus (HIV), this is likely to worsen. Examples of such infections include impetigo, erysipelas, cellulitis, ecthyma, furuncles, carbuncles and subcutaneous abscesses. Common causative organisms are ...

  11. Long-Term Follow Up of Superficial Bladder Tumors | Shelbaia ...

    African Journals Online (AJOL)

    Conclusion: The treatment of superficial TCC may be done by relatively minor endoscopic procedures, but the disease itself is a serious condition that merits close long-term follow-up. Key words: bladder tumors, transitional cell carcinoma (TCC), ND: YAG lasers, transurethral resection (TURT) Suivi à long terme des ...

  12. Gamma Activation Analysis in the Havana Bay superficial sediments

    International Nuclear Information System (INIS)

    Lopez, N.; Gelen, A.; Diaz Riso, O.; Manso, M.V.; Simon, M.J.; Maslov, A.G.; Gustova, M.V.; Beltran, J.; Soto, J.

    2003-01-01

    A preliminary study of 26 elements of Havana Bay superficial sediments were made using Gamma Activation Analysis. Samples from five zones of Havana Bay were analyzed. The results show a close interrelation between the concentration levels of the studied elements and the contaminant sources

  13. Spectrum of cytological findings in patients with superficial ...

    African Journals Online (AJOL)

    Journal of Medicine and Biomedical Research. Journal Home ... Superficial lymphadenopathy ranked among the most common clinical findings encountered in medical practice. Fine needle ... In each procedure, an average of 2 to 3 passes is usually performed and aspirated materials smeared into 4 slides. Slides were ...

  14. Frey′s Syndrome as a Sequela of Superficial Parotidectomy

    Directory of Open Access Journals (Sweden)

    Rishi Kumar Bali

    2006-01-01

    The disorder is characterized by unilateral sweating and flushing of facial skin in the area of parotid gland occurring during meals. We present a case of a patient who developed symptoms of Frey Syndrome 4 months after undergoing superficial parotidectomy on left side.

  15. Secondary hematologic neoplasm after intravesical chemotherapy for superficial bladder carcinoma

    NARCIS (Netherlands)

    Sonneveld, P.; Kurth, K. H.; Hagemeyer, A.; Abels, J.

    1990-01-01

    Two cases are reported of patients who developed a hematologic malignancy several years after intravesical chemotherapy of superficial bladder cancer with etoglucid, doxorubicin, and mitomycin C. In one patient, karyotypic abnormalities (-5, 7q-) typical of a therapy induced malignancy were

  16. Risk factors associated with acquiring superficial fungal infections in ...

    African Journals Online (AJOL)

    sonal grooming and good nutrition than if the child was living with just one of the parents, grandparents or any other family member. Socio-economic status of parents has been one of the factors associated with presence of superficial fungal infections. Pupils with parents of low socio-economic status had been found to have ...

  17. A retrospective analysis of patients treated for superficial vein thrombosis

    NARCIS (Netherlands)

    Wichers, I. M.; Haighton, M.; Büller, H. R.; Middeldorp, S.

    2008-01-01

    Introduction: The absolute risk of deep venous thrombosis (DVT) and pulmonary embolism (PE) as well as extension and/or recurrence in superficial vein thrombosis (SVT) of the leg is considerable and underestimated. We retrospectively evaluated therapeutic management, thrombophilic risk factors and

  18. Major Superficial White Matter Abnormalities in Huntington's Disease.

    Science.gov (United States)

    Phillips, Owen R; Joshi, Shantanu H; Squitieri, Ferdinando; Sanchez-Castaneda, Cristina; Narr, Katherine; Shattuck, David W; Caltagirone, Carlo; Sabatini, Umberto; Di Paola, Margherita

    2016-01-01

    The late myelinating superficial white matter at the juncture of the cortical gray and white matter comprising the intracortical myelin and short-range association fibers has not received attention in Huntington's disease. It is an area of the brain that is late myelinating and is sensitive to both normal aging and neurodegenerative disease effects. Therefore, it may be sensitive to Huntington's disease processes. Structural MRI data from 25 Pre-symptomatic subjects, 24 Huntington's disease patients and 49 healthy controls was run through a cortical pattern-matching program. The surface corresponding to the white matter directly below the cortical gray matter was then extracted. Individual subject's Diffusion Tensor Imaging (DTI) data was aligned to their structural MRI data. Diffusivity values along the white matter surface were then sampled at each vertex point. DTI measures with high spatial resolution across the superficial white matter surface were then analyzed with the General Linear Model to test for the effects of disease. There was an overall increase in the axial and radial diffusivity across much of the superficial white matter (p Huntington's disease patients increased diffusivity covered essentially the whole brain (p disease burden (p Huntington's disease. Since, the superficial white matter has a unique microstructure and function these abnormalities suggest it plays an important role in the disease.

  19. Superficial mycoses among psychiatric patients in Mathari Hospital, Nairobi, Kenya.

    Science.gov (United States)

    Ogutu, M; Ng'ang'a, Z; Namasaka, M; Wambura, M

    2010-09-01

    To determine the prevalence of superficial mycoses among psychiatric patients. Randomised Prospective study Mathari Mental Hospital, and Jomo Kenyatta University of Agriculture and Technology, Nairobi Kenya. A study was conducted on prevalence of superficial fungal infections among psychiatric patients in Mathari Hospital, Nairobi, Kenya during the period of July to November 2009. 152 patients were assessed and samples collected from 25 patients with clinically suggestive symptoms of dermatomycosis revealed a 12.5% prevalence of superficial mycosis. There was no significant difference between males and females with superficial mycosis (P>0.05). Twenty percent of the patients who were on topical application had no viable organisms. Microsporum was the predominant species isolated while the skin was the site most commonly affected (64 %). Epidermophyton was the least prevalent. Terbinafin was the most effective antifungal while ketoconazole was the least effective. All patients admitted at Mathari hospital should be screened for fungal infection and treated. Terbinafin can be used as first line treatment of dermatomycosis after screening all psychiatric patients in Mathari Mental Hospital.

  20. Superficial parotidectomy versus retrograde partial superficial parotidectomy in treating benign salivary gland tumor (pleomorphic adenoma).

    Science.gov (United States)

    Emodi, Omri; El-Naaj, Imad Abu; Gordin, Arye; Akrish, Sharon; Peled, Micha

    2010-09-01

    Of all benign salivary gland tumors of the parotid gland, pleomorphic adenoma (mixed tumor) is the most common. It accounts for 60% to 70% of all benign tumors of the parotid gland. This neoplasm arises in patients in the fourth to sixth decade of life, with a female predominance. The surgical excision of this lesion continues to be the subject of major debate. The goal is to avoid facial disability yet attain complete resection without perforation of the capsule/pseudocapsule. The purpose of our study is to compare 2 surgical techniques performed at the Ear, Nose, and Throat and Maxillofacial Departments, Rambam Medical Center, Haifa, Israel, and determine which is preferable in treating this lesion. We reviewed 48 patients who underwent excision of pleomorphic adenoma of the parotid gland between 1996 and 2005 at Rambam Medical Center: 18 were treated surgically with the classical superficial parotidectomy (SP) technique, using an anterograde approach, and 30 were treated with retrograde partial superficial parotidectomy (PSP). We compared the 2 surgical techniques in terms of surgical time, histopathologic size of the lesion, amount of excised healthy parotid tissue, histologic margin, and the preservation of the capsule/pseudocapsule. We also made clinical records of temporary or definitive injury to the facial nerve, which branches of the facial nerve were temporarily or definitively injured, the occurrence of Frey syndrome, esthetic satisfaction, and the amount of recurrence or infection after surgery. Of the 48 patients, 19 (39.6%) were male and 29 (60.4%) were female, with a mean age (+/- SD) of 43.8 +/- 16.97 years (median, 50 years; range, 12-79 years). We found a significant difference (P = .029) in mean surgical time (+/- SD): 171 +/- 49.7 minutes (median, 165 minutes) when performing the classical SP and 145 +/- 42.7 minutes (median, 130 minutes) when performing the retrograde PSP. Much more healthy parotid tissue was taken out with the classical

  1. [Experimental study on Buyang Huanwu decoction ([Chinese characters: see text]) for promoting functional recovery of crushed common peroneal nerve in rats].

    Science.gov (United States)

    Zhou, Lan; Mei, Xiao-yun; Wu, Hao-xin; Xie, Hui; Tang, Xue-mei; Sun, Hua-lin

    2011-03-01

    To study the effects of Buyang Huanwu Decoction ([Chinese characters: see text]) on promoting functional recovery of crushed common peroneal nerve in rats. Thirty Sprague-Dawley rats were subjected to produce common peroneal nerve injuries model,and the length of injury was 5 mm. All the rats were divided into 3 groups: BYHWD group, mecobalamin group and model group. The drugs were given by gavage daily for 18 days. Footprint test was performed at the 18th day after surgery to evaluate toe spread function (TSF). Electrophysiology was performed at the 18th day after operation to determine the nerve conduct velocity (NCV). The wet weight ratio and section area of tibial muscle were also measured. (TSF:At the 18th day after operation, the TSF in BYHWD group (-0.15 +/- 0.07) increased significantly compared with that of model group (-0.25 +/- 0.07) (P functional recovery of crushed nerve as a result of accelerating recovery of TSF, raising NCV and delaying the decrease of tibial muscle section area and wet weight ratio.

  2. Major Superficial White Matter Abnormalities in Huntington disease

    Directory of Open Access Journals (Sweden)

    Owen Robert Phillips

    2016-05-01

    Full Text Available BackgroundThe late myelinating superficial white matter at the juncture of the cortical gray and white matter comprising the intracortical myelin and short-range association fibers has not received attention in Huntington’s disease. It is an area of the brain that is late myelinating and is sensitive to both normal aging and neurodegenerative disease effects. Therefore, it may be sensitive to Huntington’s disease processes. MethodsStructural MRI data from 25 Pre-symptomatic subjects, 24 Huntington’s disease patients and 49 healthy controls was run through a cortical pattern-matching program. The surface corresponding to the white matter directly below the cortical gray matter was then extracted. Individual subject’s Diffusion Tensor Imaging (DTI data was aligned to their structural MRI data. Diffusivity values along the white matter surface were then sampled at each vertex point. DTI measures with high spatial resolution across the superficial white matter surface were then analyzed with the General Linear Model to test for the effects of disease. ResultsThere was an overall increase in the axial and radial diffusivity across much of the superficial white matter (p < 0.001 in Pre-symptomatic subjects compared to controls. In Huntington’s disease patients increased diffusivity covered essentially the whole brain (p < 0.001. Changes are correlated with genotype (CAG repeat number and disease burden (p < 0.001.ConclusionsThis study showed broad abnormalities in superficial white matter even before symptoms are present in Huntington’s disease. Since the superficial white matter has a unique microstructure and function these abnormalities suggest it plays an important role in the disease.

  3. Ion acoustic instability of HPT particles, FAC density, anomalous ...

    Indian Academy of Sciences (India)

    The intense FAC destabilizes the ion acoustic wave and the resultant electrostatic turbulence creates an anomalous resistivity. The current driven resistivity produces parallel electric field and high power dissipation. The anomalous resistivity , potential differnece along the auroral field lines ∥, intensity of electric field ...

  4. Porous and Fluffy Grains in the Regions of Anomalous Extinction

    Indian Academy of Sciences (India)

    2016-01-27

    Jan 27, 2016 ... It has long been established that the ratio of total to selective extinction is anomalously large (≥ 5) in certain regions of the interstellar medium. In these regions of anomalous extinction the dust grains are likely to be irregular in shape and fluffy in structure. Using discrete dipole approximation (DDA) we ...

  5. Anomalous Evidence, Confidence Change, and Theory Change.

    Science.gov (United States)

    Hemmerich, Joshua A; Van Voorhis, Kellie; Wiley, Jennifer

    2016-08-01

    A novel experimental paradigm that measured theory change and confidence in participants' theories was used in three experiments to test the effects of anomalous evidence. Experiment 1 varied the amount of anomalous evidence to see if "dose size" made incremental changes in confidence toward theory change. Experiment 2 varied whether anomalous evidence was convergent (of multiple types) or replicating (similar finding repeated). Experiment 3 varied whether participants were provided with an alternative theory that explained the anomalous evidence. All experiments showed that participants' confidence changes were commensurate with the amount of anomalous evidence presented, and that larger decreases in confidence predicted theory changes. Convergent evidence and the presentation of an alternative theory led to larger confidence change. Convergent evidence also caused more theory changes. Even when people do not change theories, factors pertinent to the evidence and alternative theories decrease their confidence in their current theory and move them incrementally closer to theory change. Copyright © 2015 Cognitive Science Society, Inc.

  6. Rooted triple consensus and anomalous gene trees

    Directory of Open Access Journals (Sweden)

    Schmidt Heiko A

    2008-04-01

    Full Text Available Abstract Background Anomalous gene trees (AGTs are gene trees with a topology different from a species tree that are more probable to observe than congruent gene trees. In this paper we propose a rooted triple approach to finding the correct species tree in the presence of AGTs. Results Based on simulated data we show that our method outperforms the extended majority rule consensus strategy, while still resolving the species tree. Applying both methods to a metazoan data set of 216 genes, we tested whether AGTs substantially interfere with the reconstruction of the metazoan phylogeny. Conclusion Evidence of AGTs was not found in this data set, suggesting that erroneously reconstructed gene trees are the most significant challenge in the reconstruction of phylogenetic relationships among species with current data. The new method does however rule out the erroneous reconstruction of deep or poorly resolved splits in the presence of lineage sorting.

  7. Anomalous electrical conductivity of nanoscale colloidal suspensions.

    Science.gov (United States)

    Chakraborty, Suman; Padhy, Sourav

    2008-10-28

    The electrical conductivity of colloidal suspensions containing nanoscale conducting particles is nontrivially related to the particle volume fraction and the electrical double layer thickness. Classical electrochemical models, however, tend to grossly overpredict the pertinent effective electrical conductivity values, as compared to those obtained under experimental conditions. We attempt to address this discrepancy by appealing to the complex interconnection between the aggregation kinetics of the nanoscale particles and the electrodynamics within the double layer. In particular, we model the consequent alterations in the effective electrophoretic mobility values of the suspension by addressing the fundamentals of agglomeration-deagglomeration mechanisms through the pertinent variations in the effective particulate dimensions, solid fractions, as well as the equivalent suspension viscosity. The consequent alterations in the electrical conductivity values provide a substantially improved prediction of the corresponding experimental findings and explain the apparent anomalous behavior predicted by the classical theoretical postulates.

  8. 44th Annual Anomalous Absorption Conference

    Energy Technology Data Exchange (ETDEWEB)

    Beg, Farhat

    2014-03-03

    Conference Grant Report July 14, 2015 Submitted to the U. S. Department of Energy Attn: Dr. Sean Finnegan By the University of California, San Diego 9500 Gilman Drive La Jolla, California 92093 On behalf of the 44th Annual Anomalous Absorption Conference 8-13 June 2014, in Estes Park, Colorado Support Requested: $10,100 Amount expended: $3,216.14 Performance Period: 1 March 20 14 to 28 February 20 15 Principal Investigator Dr. Farhat Beg Center for Energy Research University of California, San Diego 9500 Gilman Drive La Jolla, California 92093-0417 858-822-1266 (telephone) 858-534-4543 (fax) fbeg@ucsd.edu Administrative Point of Contact: Brandi Pate, 858-534-0851, blpate®ucsd.edu I. Background The forty-fourth Anomalous Absorption Conference was held in Estes Park, Colorado from June 5-8, 2014 (aac2014.ucsd.edu). The first Anomalous Absorption Conference was held in 1971 to assemble experts in the poorly understood area of laser-plasma absorption. The goal of that conference was to address the anomalously large laser absorption seen in plasma experiments with respect to the laser absorption predicted by linear plasma theory. Great progress in this research area has been made in the decades since that first meeting, due in part to the scientific interactions that have occurred annually at this conference. Specifically, this includes the development of nonlinear laser-plasma theory and the simulation of laser interactions with plasmas. Each summer since that first meeting, this week-long conference has been held at unique locations in North America as a scientific forum for intense scientific exchanges relevant to the interaction of laser radiation with plasmas. Responsibility for organizing the conference has traditional rotated each year between the major Inertial Confinement Fusion (ICF) laboratories and universities including LANL, LLNL, LLE, UCLA UC Davis and NRL. As the conference has matured over the past four decades, its technical footprint has expanded

  9. The Anomalous Acceleration of the Pioneer Spacecrafts

    Science.gov (United States)

    de Diego, J. A.

    2008-12-01

    Radiometric data from the Pioneer 10 and 11 spacecrafts have revealed an unexplained constant acceleration of a_A = (8.74+/-1.33)×10^{-10}m s^{-2} towards the Sun, also known as the Pioneer anomaly. Different groups have analyzed the Pioneer data and have got the same results, which rules out computer programming and data handling errors. Attempts to explain this phenomenon arguing intrinsic causes on-board the spacecrafts failed or have led to inconclusive results. Therefore, the Pioneer anomalous acceleration has motivated the interest of researchers to find explanations that could bring insight upon the forces acting in the outer Solar Systems or a hint to discover new natural laws.

  10. Effect of anomalous drift during ion implantation

    International Nuclear Information System (INIS)

    Aleksandrov, P.A.; Baranova, E.K.; Beloshitskii, V.V.; Demakov, K.D.; Starostin, V.A.

    1986-01-01

    Experimental and theoretical results are presented on Tl-ion implantation into hot silicon substrates (approx. 1200 0 C). a An anomalously large (by more than an order of magnitude) displacement of the peak position of the implanted impurity distribution into the bulk of the substrate is found. b) The conclusion is drawn that the basic process responsible for this displacement of the peak is radiation-enhanced diffusion (RED) due to nonequilibrium concentration of point defects produced in the heated target directly under implantation. c) The crystalline structure of the resulting ion-implanted layer indicates that in-situ annealing of the exposed layer occurs during high-temperature implantation. d) Experimental impurity distributions confirm the possibility of producing an implanted-impurity 'buried layer' below the layer of a single crystal silicon, the 'buried layer' depth depending on the implantation regime. (author)

  11. Anomalous Right Subclavian Artery-Esophageal Fistulae

    Directory of Open Access Journals (Sweden)

    Courtney Brooke Shires

    2018-01-01

    Full Text Available An aberrant right subclavian artery (ARSA is the most common aortic arch anomaly, but only 19 previous cases of ARSA-esophageal fistula have been reported. Six patients have survived their bleeding episode. We describe the case of a 44-year-old woman who developed massive hemoptysis. Laryngoscopy, bronchoscopy, head and neck angiogram, and median sternotomy did not reveal what was presumed initially to be a tracheoinnominate fistula. Contrasted CT showed an anomalous subclavian artery posterior to the esophagus. Given the technical challenge of approaches for this pathology, the patient was unfit for open surgical repair. Therefore, endovascular covered stent grafts were deployed spanning the segment of the subclavian artery in continuity with the esophagus, via a right brachial artery approach. Unfortunately, the patient died after successful placement of the grafts.

  12. Anomalous inelastic neutron scattering from calcite

    International Nuclear Information System (INIS)

    Dove, M.T.; Harris, M.J.; Winkler, B.; Hagen, M.E.; Keele Univ.; Powell, B.M.; Steigenberger, U.

    1992-01-01

    Inelastic neutron scattering measurements on calcite (CaCO 3 ) in its low temperature phase have revealed the existence of an unusual column of inelastic scattering at the wavevector corresponding to the F point of the high temperature Brillouin zone. At the same wavevector there is also a transverse acoustic soft mode and the column of scattering ranges in energy from zero up to the soft mode. The intensity of the anomalous scattering increases rapidly with temperature, and is consistent with an Arrhenius relation of the form exp(-T * /T), where T * = 1035 K. We speculate that this scattering arises from thermal fluctuations of the calcite structure into a different ordered structure, which is related to an ordering instability at the F point. Evidence for this possibility has also been obtained from lattice energy calculations. (author)

  13. Edge separation using diffraction anomalous fine structure

    International Nuclear Information System (INIS)

    Ravel, B.; Bouldin, C.E.; Renevier, H.; Hodeau, J.L.; Berar, J.F.

    1999-01-01

    We exploit the crystallographic sensitivity of the Diffraction Anomalous Fine-Structure (DAFS) measurement to separate the fine structure contributions of different atomic species with closely spaced resonant energies. In BaTiO 3 the Ti K edge and Ba Lm edges are separated by 281 eV, or about 8.2 Angstrom -1 ), thus severely limiting the information content of the Ti K edge signal. Using the site selectivity of DAFS we can separate the two fine structure spectra using an iterative Kramers-Kronig method, thus extending the range of the Ti K edge spectrum. This technique has application to many rare earth/transition metal compounds, including many magnetic materials of technological significance for which K and L edges overlap in energy. (au)

  14. Mapping Anomalous Currents in Supersymmetric Dualities

    CERN Document Server

    Abel, Steven; Komargodski, Zohar

    2011-01-01

    In many strongly-coupled systems, the infrared dynamics is described by different degrees of freedom from the ultraviolet. It is then natural to ask how operators written in terms of the microscopic variables are mapped to operators composed of the macroscopic ones. Certain types of operators, like conserved currents, are simple to map, and in supersymmetric theories one can also follow the chiral ring. In this note, we consider supersymmetric theories and extend the mapping to anomalous currents (and gaugino bilinears). Our technique is completely independent of subtleties associated with the renormalization group, thereby shedding new light on previous approaches to the problem. We demonstrate the UV/IR mapping in several examples with different types of dynamics, emphasizing the uniformity and simplicity of the approach. Natural applications of these ideas include the effects of soft breaking on the dynamics of various theories and new models of electroweak symmetry breaking.

  15. Conformable derivative approach to anomalous diffusion

    Science.gov (United States)

    Zhou, H. W.; Yang, S.; Zhang, S. Q.

    2018-02-01

    By using a new derivative with fractional order, referred to conformable derivative, an alternative representation of the diffusion equation is proposed to improve the modeling of anomalous diffusion. The analytical solutions of the conformable derivative model in terms of Gauss kernel and Error function are presented. The power law of the mean square displacement for the conformable diffusion model is studied invoking the time-dependent Gauss kernel. The parameters related to the conformable derivative model are determined by Levenberg-Marquardt method on the basis of the experimental data of chloride ions transportation in reinforced concrete. The data fitting results showed that the conformable derivative model agrees better with the experimental data than the normal diffusion equation. Furthermore, the potential application of the proposed conformable derivative model of water flow in low-permeability media is discussed.

  16. Anomalous pulse interaction in dissipative media

    Science.gov (United States)

    Bordyugov, Grigory; Engel, Harald

    2008-06-01

    We review a number of phenomena occurring in one-dimensional excitable media due to modified decay behind propagating pulses. Those phenomena can be grouped in two categories depending on whether the wake of a solitary pulse is oscillatory or not. Oscillatory decay leads to nonannihilative head-on collision of pulses and oscillatory dispersion relation of periodic pulse trains. Stronger wake oscillations can even result in a bistable dispersion relation. Those effects are illustrated with the help of the Oregonator and FitzHugh-Nagumo models for excitable media. For a monotonic wake, we show that it is possible to induce bound states of solitary pulses and anomalous dispersion of periodic pulse trains by introducing nonlocal spatial coupling to the excitable medium.

  17. Anomalous diffusion in geophysical and laboratory turbulence

    Directory of Open Access Journals (Sweden)

    A. Tsinober

    1994-01-01

    Full Text Available We present an overview and some new results on anomalous diffusion of passive scalar in turbulent flows (including those used by Richardson in his famous paper in 1926. The obtained results are based on the analysis of the properties of invariant quantities (energy, enstrophy, dissipation, enstrophy generation, helicity density, etc. - i.e. independent of the choice of the system of reference as the most appropriate to describe physical processes - in three different turbulent laboratory flows (grid-flow, jet and boundary layer, see Tsinober et al. (1992 and Kit et al. (1993. The emphasis is made on the relations between the asymptotic properties of the intermittency exponents of higher order moments of different turbulent fields (energy, dissipation, helicity, spontaneous breaking of isotropy and reflexional symmetry and the variability of turbulent diffusion in the atmospheric boundary layer, in the troposphere and in the stratosphere. It is argued that local spontaneous breaking of isotropy of turbulent flow results in anomalous scaling laws for turbulent diffusion (as compared to the scaling law of Richardson which are observed, as a rule, in different atmospheric layers from the atmospheric boundary layer (ABL to the stratosphere. Breaking of rotational symmetry is important in the ABL, whereas reflexional symmetry breaking is dominating in the troposphere locally and in the stratosphere globally. The results are of speculative nature and further analysis is necessary to validate or disprove the claims made, since the correspondence with the experimental results may occur for the wrong reasons as happens from time to time in the field of turbulence.

  18. Anomalous diffusion in geophysical and laboratory turbulence

    Science.gov (United States)

    Tsinober, A.

    We present an overview and some new results on anomalous diffusion of passive scalar in turbulent flows (including those used by Richardson in his famous paper in 1926). The obtained results are based on the analysis of the properties of invariant quantities (energy, enstrophy, dissipation, enstrophy generation, helicity density, etc.) - i.e. independent of the choice of the system of reference as the most appropriate to describe physical processes - in three different turbulent laboratory flows (grid-flow, jet and boundary layer, see Tsinober et al. (1992) and Kit et al. (1993). The emphasis is made on the relations between the asymptotic properties of the intermittency exponents of higher order moments of different turbulent fields (energy, dissipation, helicity, spontaneous breaking of isotropy and reflexional symmetry) and the variability of turbulent diffusion in the atmospheric boundary layer, in the troposphere and in the stratosphere. It is argued that local spontaneous breaking of isotropy of turbulent flow results in anomalous scaling laws for turbulent diffusion (as compared to the scaling law of Richardson) which are observed, as a rule, in different atmospheric layers from the atmospheric boundary layer (ABL) to the stratosphere. Breaking of rotational symmetry is important in the ABL, whereas reflexional symmetry breaking is dominating in the troposphere locally and in the stratosphere globally. The results are of speculative nature and further analysis is necessary to validate or disprove the claims made, since the correspondence with the experimental results may occur for the wrong reasons as happens from time to time in the field of turbulence.

  19. Effects of implantable peroneal nerve stimulation on gait quality, energy expenditure, participation and user satisfaction in patients with post-stroke drop foot using an ankle-foot orthosis

    NARCIS (Netherlands)

    Schiemanck, Sven; Berenpas, Frank; van Swigchem, Roos; van den Munckhof, Pepijn; de Vries, Joost; Beelen, Anita; Nollet, Frans; Geurts, Alexander C.

    2015-01-01

    To investigate whether an implantable functional electrical stimulation (FES) system of the common peroneal nerve (ActiGait®) improves relevant aspects of gait in chronic stroke patients with a drop foot typically using an ankle-foot orthosis (AFO). Ten community-dwelling patients participated, of

  20. Is transcutaneous peroneal stimulation beneficial to patients with chronic stroke using an ankle-foot orthosis? A within-subjects study of patients' satisfaction, walking speed and physical activity level.

    NARCIS (Netherlands)

    Swigchem, R. van; Vloothuis, J.; Boer, J. de; Weerdesteijn, V.G.M.; Geurts, A.C.H.

    2010-01-01

    OBJECTIVE: The aim of this study was to evaluate whether community-dwelling chronic stroke patients wearing an ankle-foot orthosis would benefit from changing to functional electrical stimulation of the peroneal nerve. METHODS: In 26 community-dwelling chronic (> 6 months post-onset) patients after

  1. No need to replace an "anomalous" primate (Primates) with an "anomalous" bear (Carnivora, Ursidae).

    Science.gov (United States)

    Gutiérrez, Eliécer E; Pine, Ronald H

    2015-01-01

    By means of mitochondrial 12S rRNA sequencing of putative "yeti", "bigfoot", and other "anomalous primate" hair samples, a recent study concluded that two samples, presented as from the Himalayas, do not belong to an "anomalous primate", but to an unknown, anomalous type of ursid. That is, that they match 12S rRNA sequences of a fossil Polar Bear (Ursusmaritimus), but neither of modern Polar Bears, nor of Brown Bears (Ursusarctos), the closest relative of Polar Bears, and one that occurs today in the Himalayas. We have undertaken direct comparison of sequences; replication of the original comparative study; inference of phylogenetic relationships of the two samples with respect to those from all extant species of Ursidae (except for the Giant Panda, Ailuropodamelanoleuca) and two extinct Pleistocene species; and application of a non-tree-based population aggregation approach for species diagnosis and identification. Our results demonstrate that the very short fragment of the 12S rRNA gene sequenced by Sykes et al. is not sufficiently informative to support the hypotheses provided by these authors with respect to the taxonomic identity of the individuals from which these sequences were obtained. We have concluded that there is no reason to believe that the two samples came from anything other than Brown Bears. These analyses afforded an opportunity to test the monophyly of morphologically defined species and to comment on both their phylogenetic relationships and future efforts necessary to advance our understanding of ursid systematics.

  2. Effects of superficial gas velocity on process dynamics in bioreactors

    Science.gov (United States)

    Devi, T. T.; Kumar, B.

    2014-06-01

    Present work analyzes the flow hydrodynamics and mass transfer mechanisms in double Rushton and CD-6 impeller on wide range (0.0075-0.25 m/s) of superficial gas velocity ( v g) in a gas-liquid phase bioreactor by employing computational fluid dynamics (CFD) technique. The volume averaged velocity magnitude and dissipation rate are found higher with increasing superficial gas velocity. Higher relative power draw ( P g/ P 0) is predicted in CD-6 than the Rushton impeller but no significant difference in volume averaged mass transfer coefficient ( k L a) observed between these two types of impeller. The ratio of power draw with mass transfer coefficient has been found higher in CD-6 impeller (25-50 %) than the Rushton impeller.

  3. Rugosidad y textura de superficies: experimentos y simulaciones

    Directory of Open Access Journals (Sweden)

    Watson L. Vargas

    2006-01-01

    Full Text Available En este trabajo se aplican algunos elementos de la geometría fractal al estudio y caracterización de la rugosidad superficial. Los materiales bajo estudio consisten en agregados naturales, de amplia aplicación en la industria de la construcción. Se aplican tanto técnicas experimentales basadas en análisis de imágenes como modelos teóricos. En particular se explora el potencial de la lacunaridad –un método de análisis derivado de la geometría fractal, para describir patrones y dispersión espacial. Los resultados ilustran su aplicación en la caracterización de rugosidad superficial. Se discuten igualmente, limitaciones y ventajas de esta aproximación.

  4. [Compression syndrome of the superficial fibular nerve. Case report].

    Science.gov (United States)

    Piza-Katzer, H; Pilz, E

    1997-05-01

    The case of a female patient complaining of dysaesthesia and paraesthesia on the dorsum of her right foot and digits which failed to respond to conservative treatment is presented. 10 cm above the lateral malleolus, a muscle bulge of 2 cm was detected. Hoffmann-Tinel's sign was positive at this site. The diagnosis of nerve entrapment was confirmed by a conduction velocity block. Through an incision centered over the muscle bulge, the superficial fibular nerve was identified. It was found to be compressed by fascia. Fascial release and epineuriotomy resulted in complete recovery. Entrapment of the sensory superficial fibular nerve in the patient is thought to have been caused by prolonged work-related kneeling and squatting over many years.

  5. Superficial vein thrombosis: a current approach to management.

    Science.gov (United States)

    Scott, Gemma; Mahdi, Ali Jassem; Alikhan, Raza

    2015-03-01

    Superficial vein thrombosis (SVT) was considered to be a benign and self-limiting condition. However, it is now appreciated that a significant proportion of those presenting with SVT will have concomitant deep vein thrombosis or pulmonary embolism, or are at significant risk of developing deep venous thromboembolism. Potential therapeutic options include topical preparations, compression therapy (stockings, bandages), medication such as non-steroidal anti-inflammatory drugs (NSAIDs) or anticoagulants (therapeutic or prophylactic doses) and surgery, ligation or stripping, of superficial veins. The treatment of choice is therapeutic/intermediate dose low molecular weight heparin or prophylactic dose fondaparinux administered for 4-6 weeks. The cost-effectiveness of treatment is a concern and more targeted therapy is required. © 2014 John Wiley & Sons Ltd.

  6. Endarterectomized superficial femoral artery as an arterial patch.

    Science.gov (United States)

    Rollins, D L; Towne, J B; Bernhard, V M; Baum, P L

    1985-03-01

    Eighty-six patients underwent 90 profundaplasties for lower extremity ischemia using endarterectomized superficial femoral artery (ESFA) or vein as an arterial patch. Standard length profundaplasty was performed in 60 limbs and extended profundaplasty in 28. Seventy-two were performed for limb salvage and 18 for severe claudication. Fifty-four limbs underwent inflow reconstruction and profundaplasty, while 36 others had profundaplasty alone. Three-year cumulative patency rates were employed to compare the type of autogenous patch material to the profundaplasty length, operative indications, and procedures. In all groups, ESFA performed as well as vein. Endarterectomized superficial femoral artery patch angioplasty provides comparable long-term results to vein patch in patients undergoing profundaplasty, and demonstrates its durability as a vascular patch in situations where autogenous tissue is required or preferred while preserving the saphenous vein for later use.

  7. Effects of superficial gas velocity and fluid property on the ...

    African Journals Online (AJOL)

    In the present study, the influence of superficial gas velocity and fluid properties on gas holdup and liquid circulation velocity in a three-phase external loop airlift column using polystyrene (0.0036 m diameter and 1025.55 kg/m3 density) and nylon-6 (0.0035 m diameter and 1084.24 kg/m3 density) particles with aqueous ...

  8. Superficial epidermolytic ichthyosis: a report of two families.

    Science.gov (United States)

    Cervantes, Tessa; Pham, Catherine; Browning, John C

    2013-01-01

    Superficial epidermolytic ichthyosis (SEI), previously known as ichthyosis bullosa of Siemens, is a rare genetic skin condition, characterized by blisters and hyperkeratosis. It can be easily confused with epidermolytic hyperkeratosis, known now as epidermolytic ichthyosis, and genetic testing can be helpful in differentiating between the two conditions. We describe two children with SEI confirmed by genetic testing, including one with a novel mutation. We also describe other affected family members with SEI. © 2012 Wiley Periodicals, Inc.

  9. Cervical Spinal Meningeal Melanocytoma Presenting as Intracranial Superficial Siderosis

    Directory of Open Access Journals (Sweden)

    Savitha Srirama Jayamma

    2015-01-01

    Full Text Available Meningeal melanocytoma is a rare pigmented tumor of the leptomeningeal melanocytes. This rare entity results in diagnostic difficulty in imaging unless clinical and histopathology correlation is performed. In this case report, we describe a case of meningeal melanocytoma of the cervical region presenting with superficial siderosis. Extensive neuroradiological examination is necessary to locate the source of the bleeding in such patients. Usually, the patient will be cured by the complete surgical excision of the lesion.

  10. Two Waves of Globalisation: Superficial Similarities, Fundamental Differences

    OpenAIRE

    Richard E. Baldwin; Philippe Martin

    1999-01-01

    This paper looks at the two waves of globalisation (roughly 1820-1914 and 1960-present) focusing on key economic facts (trade investment, migration, and capital flows, Industrialisation/de-industrialisation convergence/divergence) beliefs and policymaking environments. The two waves are superficial similarities but are fundamentally different. Chief similarities include aggregate trade and capital flow ratios, and the importance of reductions in barriers to international transactions. The fun...

  11. Measurement of the angle of superficial tension by images

    Science.gov (United States)

    Yanez M., Javier; Alonso R., Sergio

    2006-02-01

    When a liquid is deposited on a surface, this one form a certain angle with respect to the surface, where depending on its value, it will conclude that so hard it is his adhesion with the surface. By means of the analysis of images we looked for to measure this angle of superficial tension. In order to make this measurement, we propose a technique by means of projective transformations and one method of regression to estimation parameters to conic fitting.

  12. Superficial urinary bladder tumors treatment results: A 10-year experience

    Directory of Open Access Journals (Sweden)

    Stanković Jablan

    2007-01-01

    Full Text Available Background/Aim. The most common urinary bladder tumors are superficial tumors. Due to their tension to relapse and progress towards deeper layers after surgical therapy, an adequate therapy significantly contributed to the improvement of the results of urinary bladder tumors treatment. Staging and gradus of the tumor, presence of the carcinoma in situ (CIS or relapses significantly influenced the choice of the therapy. The aim of this study was to ascertain the effectiveness of the intravesicelly applied BCG (Bacille Colmette - Guerin vaccine or chemiotherapy in the prevention of the relapses and further progression of superficial urinary bladder tumors. Methods. All of the diagnosed superficial tumors of bladder were removed by transurethral resection (TUR. After receiving the patohistological finding they were subjected to adjuvant therapy, immune BCG vaccine or chemiotherapy (epirubicin, doxorubicin, mitomycin-C. The third group did not accept adjuvant therapy, but had regularly scheduled cystoscopic controls. The appearance of relapses, progression of stage and grades of the tumor, as well as possible unwanted effects of adjuvant therapy were registered. Results. The applied immunotherapy (BCG influenced decreased tumor relapses (7% and statistically important difference between patients who had taken adjuvant chemotherapy (relapses 18.4% and those without this therapy was acknowledged. Grades of tumor did not show statistically significant difference on tumor relapse. A significantly longer period of time in the appearance of tumor relapse after BCG (29.33 months, had significant importance comparing to chemio (9.44 months or non-taken adjuvant therapy (9.84 months. Very small number of unwanted effects suggested an obligatory undertaking adjuvant therapy after TUR of superficial tumors. Conclusion. A significant decrease of relapses as well as avoidance of further progression of urinary bladder tumors, has introduced adjuvant therapy in

  13. Usefulness of platysma muscle flap following superficial parotidectomy.

    Science.gov (United States)

    Wang, W H; Zhu, J; Li, M; Xia, B; Xu, B

    2013-01-01

    The purpose of this study was to demonstrate a novel technique of a platysma muscle flap following superficial parotidectomy and to evaluate the impact of using this flap on Frey's syndrome and postoperative appearance. In this retrospective study, there were 55 patients who had had superficial parotid gland tumors removed, 28 patients were restored by the platysma muscle flap, and the remaining 27 patients were not restored by the technique. The area of the flap was measured using Image-Pro plus 6.0 software. The objective starch-iodine test was used to determine the incidence of Frey's syndrome. The postoperative aesthetic outcome of retromandibular contour was evaluated in all the patients. The score in platysma flap group was significantly higher than the scores in the conventionally treated group (P < 0.01). The area of the flap was 1668.7 ± 218.7 square millimeters. Of 28 patients restored by the flap, 2 developed mild Frey's syndrome, and in the remaining 27 patients 10 had Frey's syndrome. There was a statistically significant difference between the two groups (P = 0.007). The technique produced satisfactory aesthetic results with good facial contour. The platysma muscle flap, used as an interposing barrier between the overlying skin flap and the parotid bed following superficial parotidectomy, produced good results in the prevention of Frey's syndrome and resulted in good postoperative facial contour. Copyright © 2012 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.

  14. Search for Anomalous Couplings in the Higgs Sector at LEP

    CERN Document Server

    Achard, P; Aguilar-Benítez, M; Alcaraz, J; Alemanni, G; Allaby, James V; Aloisio, A; Alviggi, M G; Anderhub, H; Andreev, V P; Anselmo, F; Arefev, A; Azemoon, T; Aziz, T; Bagnaia, P; Bajo, A; Baksay, G; Baksay, L; Baldew, S V; Banerjee, S; Banerjee, Sw; Barczyk, A; Barillère, R; Bartalini, P; Basile, M; Batalova, N; Battiston, R; Bay, A; Becattini, F; Becker, U; Behner, F; Bellucci, L; Berbeco, R; Berdugo, J; Berges, P; Bertucci, B; Betev, B L; Biasini, M; Biglietti, M; Biland, A; Blaising, J J; Blyth, S C; Bobbink, Gerjan J; Böhm, A; Boldizsar, L; Borgia, B; Bottai, S; Bourilkov, D; Bourquin, Maurice; Braccini, S; Branson, J G; Brochu, F; Burger, J D; Burger, W J; Cai, X D; Capell, M; Cara Romeo, G; Carlino, G; Cartacci, A M; Casaus, J; Cavallari, F; Cavallo, N; Cecchi, C; Cerrada, M; Chamizo-Llatas, M; Chang, Y H; Chemarin, M; Chen, A; Chen, G; Chen, G M; Chen, H F; Chen, H S; Chiefari, G; Cifarelli, Luisa; Cindolo, F; Clare, I; Clare, R; Coignet, G; Colino, N; Costantini, S; de la Cruz, B; Cucciarelli, S; van Dalen, J A; De Asmundis, R; Déglon, P L; Debreczeni, J; Degré, A; Dehmelt, K; Deiters, K; Della Volpe, D; Delmeire, E; Denes, P; De Notaristefani, F; De Salvo, A; Diemoz, M; Dierckxsens, M; Dionisi, C; Dittmar, M; Doria, A; Dova, M T; Duchesneau, D; Duda, M; Echenard, B; Eline, A; El-Hage, A; El-Mamouni, H; Engler, A; Eppling, F J; Extermann, P; Falagán, M A; Falciano, S; Favara, A; Fay, J; Fedin, O; Felcini, M; Ferguson, T; Fesefeldt, H S; Fiandrini, E; Field, J H; Filthaut, F; Fisher, P H; Fisher, W; Fisk, I; Forconi, G; Freudenreich, Klaus; Furetta, C; Galaktionov, Yu; Ganguli, S N; García-Abia, P; Gataullin, M; Gentile, S; Giagu, S; Gong, Z F; Grenier, G; Grimm, O; Grünewald, M W; Guida, M; van Gulik, R; Gupta, V K; Gurtu, A; Gutay, L J; Haas, D; Hatzifotiadou, D; Hebbeker, T; Hervé, A; Hirschfelder, J; Hofer, H; Hohlmann, M; Holzner, G; Hou, S R; Hu, Y; Jin, B N; Jones, L W; de Jong, P; Josa-Mutuberria, I; Kaur, M; Kienzle-Focacci, M N; Kim, J K; Kirkby, Jasper; Kittel, E W; Klimentov, A; König, A C; Kopal, M; Koutsenko, V F; Kräber, M H; Krämer, R W; Krüger, A; Kunin, A; Ladrón de Guevara, P; Laktineh, I; Landi, G; Lebeau, M; Lebedev, A; Lebrun, P; Lecomte, P; Lecoq, P; Le Coultre, P; Le Goff, J M; Leiste, R; Levtchenko, M; Levchenko, P M; Li, C; Likhoded, S; Lin, C H; Lin, W T; Linde, Frank L; Lista, L; Liu, Z A; Lohmann, W; Longo, E; Lü, Y S; Luci, C; Luminari, L; Lustermann, W; Ma Wen Gan; Malgeri, L; Malinin, A; Maña, C; Mans, J; Martin, J P; Marzano, F; Mazumdar, K; McNeil, R R; Mele, S; Merola, L; Meschini, M; Metzger, W J; Mihul, A; Milcent, H; Mirabelli, G; Mnich, J; Mohanty, G B; Muanza, G S; Muijs, A J M; Musicar, B; Musy, M; Nagy, S; Natale, S; Napolitano, M; Nessi-Tedaldi, F; Newman, H; Nisati, A; Novák, T; Nowak, H; Ofierzynski, R A; Organtini, G; Pal, I; Palomares, C; Paolucci, P; Paramatti, R; Passaleva, G; Patricelli, S; Paul, T; Pauluzzi, M; Paus, C; Pauss, Felicitas; Pedace, M; Pensotti, S; Perret-Gallix, D; Petersen, B; Piccolo, D; Pierella, F; Pioppi, M; Piroué, P A; Pistolesi, E; Plyaskin, V; Pohl, M; Pozhidaev, V; Pothier, J; Prokofev, D; Prokofiev, D O; Quartieri, J; Rahal-Callot, G; Rahaman, M A; Raics, P; Raja, N; Ramelli, R; Rancoita, P G; Ranieri, R; Raspereza, A V; Razis, P A; Ren, D; Rescigno, M; Reucroft, S; Riemann, S; Riles, K; Roe, B P; Romero, L; Rosca, A; Rosemann, C; Rosenbleck, C; Rosier-Lees, S; Roth, S; Rubio, J A; Ruggiero, G; Rykaczewski, H; Sakharov, A; Saremi, S; Sarkar, S; Salicio, J; Sánchez, E; Schäfer, C; Shchegelskii, V; Schopper, Herwig Franz; Schotanus, D J; Sciacca, C; Servoli, L; Shevchenko, S; Shivarov, N; Shoutko, V; Shumilov, E; Shvorob, A V; Son, D; Souga, C; Spillantini, P; Steuer, M; Stickland, D P; Stoyanov, B; Strässner, A; Sudhakar, K; Sultanov, G G; Sun, L Z; Sushkov, S; Suter, H; Swain, J D; Szillási, Z; Tang, X W; Tarjan, P; Tauscher, Ludwig; Taylor, L; Tellili, B; Teyssier, D; Timmermans, C; Ting, Samuel C C; Ting, S M; Tonwar, S C; Tóth, J; Tully, C; Tung, K L; Ulbricht, J; Valente, E; Van de Walle, R T; Vásquez, R; Veszpremi, V; Vesztergombi, G; Vetlitskii, I; Vicinanza, D; Viertel, Gert M; Villa, S; Vivargent, M; Vlachos, S; Vodopyanov, I; Vogel, H; Vogt, H; Vorobev, I; Vorobyov, A A; Wadhwa, M; Wang, Q; Wang, X L; Wang, Z M; Weber, M; Wilkens, H; Wynhoff, S; Xia, L; Xu, Z Z; Yamamoto, J; Yang, B Z; Yang, C G; Yang, H J; Yang, M; Yeh, S C; Zalite, A; Zalite, Yu; Zhang, Z P; Zhao, J; Zhu, G Y; Zhu, R Y; Zhuang, H L; Zichichi, A; Zimmermann, B; Zöller, M

    2004-01-01

    Anomalous couplings of the Higgs boson are searched for through the processes e^+ e^- -> H gamma, e^+ e^- -> e^+ e^- H and e^+ e^- -> HZ. The mass range 70 GeV ffbar, H -> gamma gamma, H -> Z\\gamma and H -> WW^(*) are considered and no evidence is found for anomalous Higgs production or decay. Limits on the anomalous couplings d, db, Delta(g1z), Delta(kappa_gamma) and xi^2 are derived as well as limits on the H -> gamma gamma and H -> Z gamma decay rates.

  15. Management of superficial vein thrombosis and thrombophlebitis: status and expert opinion document.

    Science.gov (United States)

    Cesarone, M R; Belcaro, G; Agus, G; Georgiev, M; Errichi, B M; Marinucci, R; Errichi, S; Filippini, A; Pellegrini, L; Ledda, A; Vinciguerra, G; Ricci, A; Cipollone, G; Lania, M; Gizzi, G; Ippolito, E; Bavera, P; Fano, F; Dugall, M; Adovasio, R; Gallione, L; Del Boccio, G; Cornelli, U; Steigerwalt, R; Acerbi, G; Cacchio, M; Di Renzo, A; Hosoi, M; Stuard, S; Corsi, M; Di Ciano, L; Simeone, E; Collevecchio, G; Grossi, M G; Di Giambattista, F; Carestia, F; Zukowski, A

    2007-01-01

    Superficial vein thrombosis is characterized by clotting of superficial veins (ie, following direct trauma) with minimal inflammatory components. Superficial thrombophlebitis is a minimally thrombotic process of superficial veins associated with inflammatory changes and/or infection. Treatments generally include analgesics, elastic compression, anti-inflammatory agents, exercise and ambulation, and, in some cases, local or systemic anticoagulants. It is better to avoid bed rest and reduced mobility. Topical analgesia with nonsteroidal, anti-inflammatory creams applied locally to the superficial vein thrombosis/superficial thrombophlebitis area controls symptoms. Hirudoid cream (heparinoid) shortens the duration of signs/symptoms. Locally acting anticoagulants/antithrombotics (Viatromb, Lipohep, spray Na-heparin) have positive effects on pain and on the reduction in thrombus size. Intravenous catheters should be changed every 24 to 48 hours (depending on venous flow and clinical parameters) to prevent superficial vein thrombosis/superficial thrombophlebitis and removed in case of events. Low molecular weight heparin prophylaxis and nitroglycerin patches distal to peripheral lines may reduce the incidence of superficial vein thrombosis/superficial thrombophlebitis in patients with vein catheters. In case of superficial vein thrombosis/superficial thrombophlebitis, vein lines should be removed. In neoplastic diseases and hematological disorders, anticoagulants may be necessary. Exercise reduces pain and the possibility of deep vein thrombosis. Only in cases in which pain is very severe is bed rest necessary. Deep vein thrombosis prophylaxis should be established in patients with reduced mobility. Antibiotics usually do not have a place in superficial vein thrombosis/superficial thrombophlebitis unless there are documented infections. Prevention of superficial vein thrombosis should be considered on the basis of patient's history and clinical evaluation.

  16. Superficial venous disease and combined hormonal contraceptives: a systematic review.

    Science.gov (United States)

    Tepper, Naomi K; Marchbanks, Polly A; Curtis, Kathryn M

    2016-09-01

    Superficial venous disease, which includes superficial venous thrombosis (SVT) and varicose veins, may be associated with a higher risk of venous thromboembolism (VTE). Use of combined hormonal contraceptives (CHCs) has been associated with an increased risk of VTE compared with nonuse. Little is known about whether use of CHCs by women with superficial venous disease may further elevate the risk of VTE. To investigate evidence regarding risk of VTE in women with SVT or varicose veins who use CHCs compared with non-CHC users. We searched the PubMed database for all English-language articles published from database inception through September 2014. We included primary research studies that examined women with SVT or varicose veins who used CHCs compared to women with these conditions who did not use CHCs. Outcomes of interest included VTE (among women with SVT or varicose veins) and SVT (for those with varicose veins). Two studies were identified that met inclusion criteria. One fair-quality case-control study reported an odds ratio (OR) for VTE of 43.0 (95% confidence interval [CI] 15.5-119.3) among women with SVT using oral contraceptives (OCs) compared with nonusers without SVT. The OR for VTE was also increased for women with SVT not using OCs (OR 5.1; 95% CI 2.8-9.5) and for women without SVT using OCs (OR 4.0; 95% CI 3.3-4.7), compared with nonusers without SVT. One fair-quality cohort study demonstrated that women with varicose veins had an increased rate of VTE with use of OCs (1.85 per 1000 women-years [WY]), compared with users without varicose veins (0.84 per 1000 WY), nonusers with varicose veins (0.31 per 1000 WY) and nonusers without varicose veins (0.19 per 1000 WY). This study also demonstrated that women with varicose veins had an increased rate of SVT with use of OCs (10.63 per 1000 WY), compared with nonusers with varicose veins (7.59 per 1000 WY), users without varicose veins (1.89 per 1000 WY) and nonusers without varicose veins (0.77 per 1000

  17. The Effects of Superficial Musculoaponeurotic System Flap on the Development of Frey's Syndrome and Cosmetic Outcomes After Superficial Parotidectomy.

    Science.gov (United States)

    Bayır, Ömer; Çelik, Elif Kaya; Saylam, Güleser; Tatar, Emel Çadallı; Saka, Cem; Dağlı, Muharrem; Özdek, Ali; Korkmaz, Mehmet Hakan

    2016-12-01

    To investigate the outcomes of superficial musculoaponeurotic system (SMAS) flap and classic techniques in superficial parotidectomy in terms of Frey's syndrome (FS) and cosmetic satisfaction. In this study, a retrospective chart review of patients that underwent superficial parotidectomy was performed. These patients were divided into two subgroups: group 1 included patients in which the SMAS flap was harvested and group 2 comprised the remaining patients on whom classic superficial parotidectomy was performed. All the patients were evaluated clinically and with Minor's starch-iodine test for FS. For the evaluation of the cosmetic results, the patient's satisfaction was queried according to the incision scar and surgical field skin retraction/facial symmetry. Both groups were compared in terms of complications and numbness of surgical area. Fifty-five patients (31 male and 24 female) with a mean age of 50.19 years were included in the study. Thirty-two patients were in group 1 and 23 in group 2. Thirteen patients (23.7%) described as having FS and six of them were in group 1, while seven were in group 2. Minor's starch-iodine test was positive in nine patients in group 1 (28.1%) and six patients in group 2 (26.1%) (p=1.000). With regard to cosmetic satisfaction, eight patients (25%) stated mild discomfort from the incision scar and two patients (6.3%) stated cosmetic dissatisfaction for facial asymmetry in group 1. In group 2 for the same factors the number of patients were 11 (47.8%) and 2 two (8.7%), respectively (p=0.027). There were no statistically significant differences in means of complication and numbness (p>0.05). According to our study results, there was no superiority between both the groups in terms of FS and incision scar satisfaction. We determined that there was a significant benefit of SMAS flap application in the prevention of volume loss and surgical area retraction.

  18. Superficial perineal leiomyosarcoma in an adolescent female and a review of the literature including vulvar leiomyosarcomas

    DEFF Research Database (Denmark)

    Grove, A; Backman Nøhr, S

    1992-01-01

    Superficial perineal leiomyosarcomas are rare, with only three previously reported examples. We encountered a superficial (deep subcutaneous) perineal leiomyosarcoma in a 17-year-old female. At follow-up two years after a wide excision, there were no signs of recurrence. The tumour was well...... differentiated and showed immunoreactivity for alpha-smooth muscle actin and desmin. A review of the literature on superficial leiomyosarcomas indicates that superficial perineal leiomyosarcomas may be more aggressive than superficial leiomyosarcomas in general. As the presented tumour occurred in a female...

  19. Anomalous Anticipatory Responses in Networked Random Data

    International Nuclear Information System (INIS)

    Nelson, Roger D.; Bancel, Peter A.

    2006-01-01

    We examine an 8-year archive of synchronized, parallel time series of random data from a world spanning network of physical random event generators (REGs). The archive is a publicly accessible matrix of normally distributed 200-bit sums recorded at 1 Hz which extends from August 1998 to the present. The primary question is whether these data show non-random structure associated with major events such as natural or man-made disasters, terrible accidents, or grand celebrations. Secondarily, we examine the time course of apparently correlated responses. Statistical analyses of the data reveal consistent evidence that events which strongly affect people engender small but significant effects. These include suggestions of anticipatory responses in some cases, leading to a series of specialized analyses to assess possible non-random structure preceding precisely timed events. A focused examination of data collected around the time of earthquakes with Richter magnitude 6 and greater reveals non-random structure with a number of intriguing, potentially important features. Anomalous effects in the REG data are seen only when the corresponding earthquakes occur in populated areas. No structure is found if they occur in the oceans. We infer that an important contributor to the effect is the relevance of the earthquake to humans. Epoch averaging reveals evidence for changes in the data some hours prior to the main temblor, suggestive of reverse causation

  20. Diagnosing Anomalous Network Performance with Confidence

    Energy Technology Data Exchange (ETDEWEB)

    Settlemyer, Bradley W [ORNL; Hodson, Stephen W [ORNL; Kuehn, Jeffery A [ORNL; Poole, Stephen W [ORNL

    2011-04-01

    Variability in network performance is a major obstacle in effectively analyzing the throughput of modern high performance computer systems. High performance interconnec- tion networks offer excellent best-case network latencies; how- ever, highly parallel applications running on parallel machines typically require consistently high levels of performance to adequately leverage the massive amounts of available computing power. Performance analysts have usually quantified network performance using traditional summary statistics that assume the observational data is sampled from a normal distribution. In our examinations of network performance, we have found this method of analysis often provides too little data to under- stand anomalous network performance. Our tool, Confidence, instead uses an empirically derived probability distribution to characterize network performance. In this paper we describe several instances where the Confidence toolkit allowed us to understand and diagnose network performance anomalies that we could not adequately explore with the simple summary statis- tics provided by traditional measurement tools. In particular, we examine a multi-modal performance scenario encountered with an Infiniband interconnection network and we explore the performance repeatability on the custom Cray SeaStar2 interconnection network after a set of software and driver updates.

  1. Anomalous Solubility Behavior of Several Acidic Drugs

    Directory of Open Access Journals (Sweden)

    Alex Avdeef

    2014-04-01

    Full Text Available The “anomalous solubility behavior at higher pH values” of several acidic drugs originally studied by Higuchi et al. in 1953 [1], but hitherto not fully rationalized, has been re-analyzed using a novel solubility-pH analysis computer program, pDISOL-XTM. The program internally derives implicit solubility equations, given a set of proposed equilibria and constants (iteratively refined by weighted nonlinear regression, and does not require explicit Henderson-Hasselbalch equations. The re-analyzed original barbital, phenobarbital, oxytetracycline, and sulfathiazole solubility-pH data of Higuchi et al. is consistent with the presence of dimers in saturated solutions. In the case of barbital, phenobarbital and sulfathiazole, anionic dimers, reaching peak concentrations near pH 8. However, oxytetracycline indicated a pronounced tendency to form a cationic dimer, peaking near pH 2. Under the conditions of the original study, only barbital indicated a slight tendency to form a salt precipitate at pH > 6.8, with a highly unusual stoichiometry (consistent with a slope of 0.55 in the log S – pH plot: K+ + A2H- + 3HA D KA5H4(s. Thus the “anomaly” in the Higuchi data can be rationalized by invoking specific aggregated species.

  2. Anomalous water diffusion in salt solutions

    Science.gov (United States)

    Ding, Yun; Hassanali, Ali A.; Parrinello, Michele

    2014-01-01

    The dynamics of water exhibits anomalous behavior in the presence of different electrolytes. Recent experiments [Kim JS, Wu Z, Morrow AR, Yethiraj A, Yethiraj A (2012) J Phys Chem B 116(39):12007–12013] have found that the self-diffusion of water can either be enhanced or suppressed around CsI and NaCl, respectively, relative to that of neat water. Here we show that unlike classical empirical potentials, ab initio molecular dynamics simulations successfully reproduce the qualitative trends observed experimentally. These types of phenomena have often been rationalized in terms of the “structure-making” or “structure-breaking” effects of different ions on the solvent, although the microscopic origins of these features have remained elusive. Rather than disrupting the network in a significant manner, the electrolytes studied here cause rather subtle changes in both structural and dynamical properties of water. In particular, we show that water in the ab initio molecular dynamics simulations is characterized by dynamic heterogeneity, which turns out to be critical in reproducing the experimental trends. PMID:24522111

  3. Are anomalously short tunnelling times measurable?

    International Nuclear Information System (INIS)

    Delgado, V.; Muga, J.G.

    1996-01-01

    Low and Mende have analyzed the conditions that would make possible an actual measurement of an anomalously short traversal time through a potential barrier concluding that such a measurement cannot be made because it is not possible to describe the tunnelling of a wave packet initially close to the barrier by the open-quote open-quote usual wave packet space time analysis close-quote close-quote. We complement this work in several ways: It is argued that the described failure of the usual formalism occurs under a set of too restrictive conditions, some of them not physically motivated, so it does not necessarily imply the impossibility of such a measurement. However, by retaining only conditions well motivated on physical grounds we have performed a systematic numerical check which shows that the conclusion by Low and Mende is indeed generally valid. It is shown that, as speculated by Low and Mende, the process is dominated by over the barrier transmission. Copyright copyright 1996 Academic Press, Inc

  4. Anomalous dispersion of microcavity trion-polaritons

    Science.gov (United States)

    Dhara, S.; Chakraborty, C.; Goodfellow, K. M.; Qiu, L.; O'Loughlin, T. A.; Wicks, G. W.; Bhattacharjee, Subhro; Vamivakas, A. N.

    2018-02-01

    The strong coupling of excitons to optical cavities has provided new insights into cavity quantum electrodynamics as well as opportunities to engineer nanoscale light-matter interactions. Here we study the interaction between out-of-equilibrium cavity photons and both neutral and negatively charged excitons, by embedding a single layer of the atomically thin semiconductor molybdenum diselenide in a monolithic optical cavity based on distributed Bragg reflectors. The interactions lead to multiple cavity polariton resonances and anomalous band inversion for the lower, trion-derived, polariton branch--the central result of the present work. Our theoretical analysis reveals that many-body effects in an out-of-equilibrium setting result in an effective level attraction between the exciton-polariton and trion-polariton accounting for the experimentally observed inverted trion-polariton dispersion. Our results suggest a pathway for studying interesting regimes in quantum many-body physics yielding possible new phases of quantum matter as well as fresh possibilities for polaritonic device architectures.

  5. Anomalous transport from holography. Pt. II

    Energy Technology Data Exchange (ETDEWEB)

    Bu, Yanyan; Sharon, Amir [Ben-Gurion University of the Negev, Department of Physics, Beersheba (Israel); Lublinsky, Michael [Ben-Gurion University of the Negev, Department of Physics, Beersheba (Israel); University of Connecticut, Physics Department, Storrs, CT (United States)

    2017-03-15

    This is a second study of chiral anomaly-induced transport within a holographic model consisting of anomalous U(1){sub V} x U(1){sub A} Maxwell theory in Schwarzschild-AdS{sub 5} spacetime. In the first part, chiral magnetic/separation effects (CME/CSE) are considered in the presence of a static spatially inhomogeneous external magnetic field. Gradient corrections to CME/CSE are analytically evaluated up to third order in the derivative expansion. Some of the third order gradient corrections lead to an anomaly-induced negative B{sup 2}-correction to the diffusion constant. We also find modifications to the chiral magnetic wave nonlinear in B. In the second part, we focus on the experimentally interesting case of the axial chemical potential being induced dynamically by a constant magnetic and time-dependent electric fields. Constitutive relations for the vector/axial currents are computed employing two different approximations: (a) derivative expansion (up to third order) but fully nonlinear in the external fields, and (b) weak electric field limit but resuming all orders in the derivative expansion. A non-vanishing nonlinear axial current (CSE) is found in the first case. The dependence on magnetic field and frequency of linear transport coefficient functions is explored in the second. (orig.)

  6. Anomalous transport from holography. Part I

    Energy Technology Data Exchange (ETDEWEB)

    Bu, Yanyan [Department of Physics, Ben-Gurion University of the Negev,Beer-Sheva 84105 (Israel); Lublinsky, Michael [Department of Physics, Ben-Gurion University of the Negev,Beer-Sheva 84105 (Israel); Physics Department, University of Connecticut,2152 Hillside Road, Storrs, CT 06269-3046 (United States); Sharon, Amir [Department of Physics, Ben-Gurion University of the Negev,Beer-Sheva 84105 (Israel)

    2016-11-17

    We revisit the transport properties induced by the chiral anomaly in a charged plasma holographically dual to anomalous U(1){sub V}×U(1){sub A} Maxwell theory in Schwarzschild-AdS{sub 5}. Off-shell constitutive relations for vector and axial currents are derived using various approximations generalising most of known in the literature anomaly-induced phenomena and revealing some new ones. In a weak external field approximation, the constitutive relations have all-order derivatives resummed into six momenta-dependent transport coefficient functions: the diffusion, the electric/magnetic conductivity, and three anomaly induced functions. The latter generalise the chiral magnetic and chiral separation effects. Nonlinear transport is studied assuming presence of constant background external fields. The chiral magnetic effect, including all order nonlinearity in magnetic field, is proven to be exact when the magnetic field is the only external field that is turned on. Non-linear corrections to the constitutive relations due to electric and axial external fields are computed.

  7. Primary percutaneous coronary intervention in an anomalous single coronary trunk arising anomalously from ascending aorta.

    Science.gov (United States)

    Gupta, Mohit D; Girish, M P; Bansal, Ankit; Chaturvedi, Vivek; Trehan, Vijay; Tyagi, Sanjay

    2016-07-01

    A 45-year-old male patient presented with acute anterior wall myocardial infarction. Angiography revealed a single coronary trunk arising from the ascending aorta above the coronary sinuses and giving rise to right coronary artery, left circumflex artery and critical stenosis in the left anterior descending artery. This report also highlights the feasibility of performing percutaneous coronary intervention (PCI) in this rare anomaly and discusses the important technical considerations to be kept in mind while attempting such a case. This is the first report of such an anomalous origin of a single coronary trunk arising from ascending aorta.

  8. Anomalous superconductivity in black phosphorus under high pressures

    International Nuclear Information System (INIS)

    Kawamura, H.; Tachikawa, K.

    1984-01-01

    Pressure induced superconductivity in single crystals of black phosphorus has been studied. Maximum onset Tsub(c) was near 13 K. The anomalous superconductivity may be explained in terms of excitonic mechanism. (author)

  9. The relation between anomalous magnetic moment and axial anomaly

    International Nuclear Information System (INIS)

    Teryaev, O.V.

    1990-12-01

    The conservation of total angular momentum of spinor particle leads to a simple relation between the famous Schwinger and Adler coefficients determining axial anomaly and anomalous magnetic moment, respectively. (author). 8 refs, 1 fig

  10. The Chelyabinsk Meteorite Hits an Anomalous Zone in the Urals

    Science.gov (United States)

    Kochemasov, G. G.

    2013-09-01

    The Chelyabinsk meteorite is "strange" because it hits an area in the Urals where anomalous events are observed: shining skies, light balls, UFOs, electrphonic bolids. The area tectonically occurs at the intersection of two fold belts: Urals and Timan.

  11. Partial anomalous pulmonary venous return in patients with pulmonary hypertension

    International Nuclear Information System (INIS)

    Sung, Won-kyung; Au, Virginia; Rose, Anand

    2012-01-01

    Anomalous pulmonary venous return is an uncommon congenital malformation, and may be partial or total. Partial anomalous pulmonary venous return (PAPVR) is more common than total anomalous pulmonary venous return, and is often associated with other congenital cardiac anomalies. Whilst many patients with PAPVR remain asymptomatic, some may present in later age with symptoms related to left-to-right shunt, right heart failure and pulmonary hypertension. We report two cases of PAPVR detected on Computed Tomography Pulmonary Angiogram (CTPA) for the work up of pulmonary hypertension. The cases demonstrate that, although uncommon, partial anomalous pulmonary venous return can be a contributing factor to pulmonary hypertension and pulmonary veins should be carefully examined when reading a CTPA study.

  12. Anomalous diffusion process applied to magnetic resonance image enhancement

    Science.gov (United States)

    Senra Filho, A. C. da S.; Garrido Salmon, C. E.; Murta Junior, L. O.

    2015-03-01

    Diffusion process is widely applied to digital image enhancement both directly introducing diffusion equation as in anisotropic diffusion (AD) filter, and indirectly by convolution as in Gaussian filter. Anomalous diffusion process (ADP), given by a nonlinear relationship in diffusion equation and characterized by an anomalous parameters q, is supposed to be consistent with inhomogeneous media. Although classic diffusion process is widely studied and effective in various image settings, the effectiveness of ADP as an image enhancement is still unknown. In this paper we proposed the anomalous diffusion filters in both isotropic (IAD) and anisotropic (AAD) forms for magnetic resonance imaging (MRI) enhancement. Filters based on discrete implementation of anomalous diffusion were applied to noisy MRI T2w images (brain, chest and abdominal) in order to quantify SNR gains estimating the performance for the proposed anomalous filter when realistic noise is added to those images. Results show that for images containing complex structures, e.g. brain structures, anomalous diffusion presents the highest enhancements when compared to classical diffusion approach. Furthermore, ADP presented a more effective enhancement for images containing Rayleigh and Gaussian noise. Anomalous filters showed an ability to preserve anatomic edges and a SNR improvement of 26% for brain images, compared to classical filter. In addition, AAD and IAD filters showed optimum results for noise distributions that appear on extreme situations on MRI, i.e. in low SNR images with approximate Rayleigh noise distribution, and for high SNR images with Gaussian or non central χ noise distributions. AAD and IAD filter showed the best results for the parametric range 1.2 MRI. This study indicates the proposed anomalous filters as promising approaches in qualitative and quantitative MRI enhancement.

  13. Structural controls on anomalous transport in fractured porous rock

    Science.gov (United States)

    Edery, Yaniv; Geiger, Sebastian; Berkowitz, Brian

    2016-07-01

    Anomalous transport is ubiquitous in a wide range of disordered systems, notably in fractured porous formations. We quantitatively identify the structural controls on anomalous tracer transport in a model of a real fractured geological formation that was mapped in an outcrop. The transport, determined by a continuum scale mathematical model, is characterized by breakthrough curves (BTCs) that document anomalous (or "non-Fickian") transport, which is accounted for by a power law distribution of local transition times ψ>(t>) within the framework of a continuous time random walk (CTRW). We show that the determination of ψ>(t>) is related to fractures aligned approximately with the macroscopic direction of flow. We establish the dominant role of fracture alignment and assess the statistics of these fractures by determining a concentration-visitation weighted residence time histogram. We then convert the histogram to a probability density function (pdf) that coincides with the CTRW ψ>(t>) and hence anomalous transport. We show that the permeability of the geological formation hosting the fracture network has a limited effect on the anomalous nature of the transport; rather, it is the fractures transverse to the flow direction that play the major role in forming the long BTC tail associated with anomalous transport. This is a remarkable result, given the complexity of the flow field statistics as captured by concentration transitions.

  14. Ingeniería de superficies y su impacto medioambiental

    Directory of Open Access Journals (Sweden)

    Agüero, A.

    2007-02-01

    Full Text Available Surface engineering addresses the modification of the microstructure and/or composition of the surface of components by mechanical, physical or chemical methods that may imply adding a material in order to change the surface properties of said component. One of its most important consequences is the significant increase of the useful life of a variety of components in a large number of industrial applications. Moreover, it contributes to energy savings by increasing efficiencies as it allows higher combustion temperatures, by allowing the use of lighter components and by significant friction reduction. In this paper, surface engineering is introduced, as well as its different modalities, examples of industrial applications and positive and negative environmental impacts.

    La ingeniería de superficies consiste en la modificación de la microestructura y/o la composición superficial de un componente mediante métodos mecánicos, físicos o químicos, que pueden implicar el aporte de otro material para cambiar las propiedades superficiales del mencionado componente. Una de sus consecuencias más importantes es que permite alargar significativamente, la vida útil de todo tipo de componentes empleados en un gran número de aplicaciones industriales. Por otra parte, contribuye al ahorro energético por permitir el aumento de las temperaturas de combustión consiguiendo una mayor eficiencia, por contribuir a la reducción de peso y por colaborar de forma significativa a disminuir la fricción entre componentes. En el presente trabajo se introduce la ingeniería de superficies, sus diferentes modalidades, algunos ejemplos de sus aplicaciones industriales y las interacciones, positivas y negativas, con el medio ambiente.

  15. Anomalous baryogenesis at the weak scale

    International Nuclear Information System (INIS)

    Singleton, R.L. Jr.

    1991-06-01

    One of the fundamental constants of nature is the baryon asymmetry of the universe -- the ratio of the number of baryons to the entropy. This constant is about 10 -11 . In baryon- number conserving theories, this was just an initial condition. With the advent of the grand unified theories (GUTs), baryon number is no longer conserved, and this asymmetry can be generated dynamically. Unfortunately, however, there are reasons for preferring another mechanism. For example, GUTs predict proton decay which, after extensive searches, has not been found. An alternative place to look for baryogenesis is the electroweak phase transition, described by the standard model, which posses all the necessary ingredients for baryogenesis. Anomalous baryon-number violation in weak interactions becomes large at high temperatures, which offers the prospect of creating the asymmetry with the standard model or minimal extensions. This can just barely be done if certain conditions are fulfilled. CP violation must be large, which rules out the minimal standard model as the source of the asymmetry, but which is easily arranged with an extended Higgs sector. The baryon-number violating rates themselves are not exactly known, and they must be pushed to their theoretical limits. A more exact determination of these rates is needed before a definitive answer can be given. Finally, the phase transition must be at least weakly first order. Such phase transitions are accompanied by the formation and expansion of bubbles of true vacuum within the false vacuum, much like the boiling of water. As the bubbles expand, they provide a departure from thermal equilibrium, otherwise the dynamics will adjust the net baryon number to zero. The bubble expansion also provides a biasing that creates an asymmetry on the bubbles surface. Under optimal conditions, the observed asymmetry can just be produced. 31 refs., 10 figs

  16. Anomalous baryogenesis at the weak scale

    Energy Technology Data Exchange (ETDEWEB)

    Singleton, R.L. Jr.

    1991-06-01

    One of the fundamental constants of nature is the baryon asymmetry of the universe -- the ratio of the number of baryons to the entropy. This constant is about 10{sup {minus}11}. In baryon- number conserving theories, this was just an initial condition. With the advent of the grand unified theories (GUTs), baryon number is no longer conserved, and this asymmetry can be generated dynamically. Unfortunately, however, there are reasons for preferring another mechanism. For example, GUTs predict proton decay which, after extensive searches, has not been found. An alternative place to look for baryogenesis is the electroweak phase transition, described by the standard model, which posses all the necessary ingredients for baryogenesis. Anomalous baryon-number violation in weak interactions becomes large at high temperatures, which offers the prospect of creating the asymmetry with the standard model or minimal extensions. This can just barely be done if certain conditions are fulfilled. CP violation must be large, which rules out the minimal standard model as the source of the asymmetry, but which is easily arranged with an extended Higgs sector. The baryon-number violating rates themselves are not exactly known, and they must be pushed to their theoretical limits. A more exact determination of these rates is needed before a definitive answer can be given. Finally, the phase transition must be at least weakly first order. Such phase transitions are accompanied by the formation and expansion of bubbles of true vacuum within the false vacuum, much like the boiling of water. As the bubbles expand, they provide a departure from thermal equilibrium, otherwise the dynamics will adjust the net baryon number to zero. The bubble expansion also provides a biasing that creates an asymmetry on the bubbles surface. Under optimal conditions, the observed asymmetry can just be produced. 31 refs., 10 figs.

  17. Anomalous facial nerve canal with cochlear malformations.

    Science.gov (United States)

    Romo, L V; Curtin, H D

    2001-05-01

    Anteromedial "migration" of the first segment of the facial nerve canal has been previously identified in a patient with a non-Mondini-type cochlear malformation. In this study, several patients with the same facial nerve canal anomaly were reviewed to assess for the association and type of cochlear malformation. CT scans of the temporal bone of 15 patients with anteromedial migration of the first segment of the facial nerve canal were collected from routine departmental examinations. In seven patients, the anomalous course was bilateral, for a total of 22 cases. The migration was graded relative to normal as either mild/moderate or pronounced. The cochlea in each of these cases was examined for the presence and size of the basilar, second, and apical turns. The turns were either absent, small, normal, or enlarged. The CT scans of five patients with eight Mondini malformations were examined for comparison. The degree of the facial nerve migration was pronounced in nine cases and mild/moderate in 13. All 22 of these cases had associated cochlear abnormalities of the non-Mondini variety. These included common cavity anomalies with lack of definition between the cochlea and vestibule (five cases), cochleae with enlarged basilar turns and absent second or third turns (five cases), and cochleae with small or normal basilar turns with small or absent second or third turns (12 cases). None of the patients with Mondini-type cochlear malformations had anteromedial migration of the facial nerve canal. Anteromedial migration of the facial nerve canal occurs in association with some cochlear malformations. It did not occur in association with the Mondini malformations. A cochlea with a Mondini malformation, being similar in size to a normal cochlea, may physically prohibit such a deviation in course.

  18. Congenital absence of superficial posterior compartment calf muscles.

    Science.gov (United States)

    Tibrewal, Saket; Alyas, Faisal; Vemulapalli, Krishna

    2014-06-01

    Although various congenital abnormalities have been described, congenital absence of calf musculature is extremely rare, with only one report on its complete absence. We are the first to describe a case of congenital absence of muscles of the superficial posterior compartment of the calf presenting in a toddler. The child presented with a history of a painless limp, however no significant difference was found in functional gait analysis. We suggest that such cases should be monitored and parents can be reassured that no immediate treatment is required.

  19. Superficial thrombophlebitis (Mondor′s Disease after breast augmentation surgery

    Directory of Open Access Journals (Sweden)

    Viana Giovanni Andre

    2008-01-01

    Full Text Available Although the aetiology of Mondor′s disease remains unclear, the most commonly cited cause is trauma of some sort. Although surgical trauma has frequently been quoted, reports that specifically implicate aesthetic breast surgery are unusual in the literature. In this article, the authors report a case of superficial thrombophlebitis of the anterolateral chest wall secondary to breast augmentation surgery in a woman, five months after the procedure. The authors performed an analysis of the disease′s main etiologic components and preponderant clinical aspects, and determined all appropriate therapeutic measures.

  20. Superficial Circumflex Iliac Artery Perforator Flap for Dorsalis Pedis Reconstruction

    OpenAIRE

    Tashiro, Kensuke; Yamashita, Shuji

    2017-01-01

    Summary: Reconstruction of dorsalis pedis with soft tissue is challenging because it needs to preserve thin structure to ensure that the patient will be able to wear shoes. Here, we report the use of a thin superficial circumflex iliac artery perforator (SCIP) flap in dorsalis pedis reconstruction. A 67-year-old man presented with a third-degree burn, which exposed his extensor tendons. A thin SCIP flap from the left inguinal region measuring 15???4?cm was transferred to the dorsalis pedis re...

  1. High dose rate brachytherapy for superficial cancer of the esophagus

    International Nuclear Information System (INIS)

    Maingon, Philippe; D'Hombres, Anne; Truc, Gilles; Barillot, Isabelle; Michiels, Christophe; Bedenne, Laurent; Horiot, Jean Claude

    2000-01-01

    Purpose: We analyzed our experience with external radiotherapy, combined modality treatment, or HDR brachytherapy alone to limited esophageal cancers. Methods and Materials: From 1991 to 1996, 25 patients with limited superficial esophagus carcinomas were treated by high dose rate brachytherapy. The mean age was 63 years (43-86 years). Five patients showed superficial local recurrence after external radiotherapy. Eleven patients without invasion of the basal membrane were staged as Tis. Fourteen patients with tumors involving the submucosa without spreading to the muscle were staged as T1. Treatment consisted of HDR brachytherapy alone in 13 patients, external radiotherapy and brachytherapy in 8 cases, and concomitant chemo- and radiotherapy in 4 cases. External beam radiation was administered to a total dose of 50 Gy using 2 Gy daily fractions in 5 weeks. In cases of HDR brachytherapy alone (13 patients), 6 applications were performed once a week. Results: The mean follow-up is 31 months (range 24-96 months). Twelve patients received 2 applications and 13 patients received 6 applications. Twelve patients experienced a failure (48%), 11/12 located in the esophagus, all of them in the treated volume. One patient presented an isolated distant metastasis. In the patients treated for superficial recurrence, 4/5 were locally controlled (80%) by brachytherapy alone. After brachytherapy alone, 8/13 patients were controlled (61%). The mean disease-free survival is 14 months (1-36 months). Overall survival is 76% at 1 year, 37% at 2 years, and 14% at 3 years. Overall survival for Tis patients is 24% vs. 20% for T1 (p 0.83). Overall survival for patients treated by HDR brachytherapy alone is 43%. One patient presented with a fistula with local failure after external radiotherapy and brachytherapy. Four stenosis were registered, two were diagnosed on barium swallowing without symptoms, and two required dilatations. Conclusion: High dose rate brachytherapy permits the treating

  2. Rare associations of tetralogy of Fallot with anomalous left coronary artery from pulmonary artery and totally anomalous pulmonary venous connection.

    Science.gov (United States)

    Sen, Supratim; Rao, Suresh G; Kulkarni, Snehal

    2016-06-01

    We describe the cases of two patients with tetralogy of Fallot, aged 4 years and 8 months, who were incidentally detected to have concomitant anomalous left coronary artery from pulmonary artery and total anomalous pulmonary venous connection, respectively, on preoperative imaging. They underwent surgical correction with good mid-term outcomes. In this study, we discuss the embryological basis, physiological effects, and review the literature of these two unusual associations. Awareness of these rare associations will avoid missed diagnoses and consequent surgical surprises.

  3. Local superficial hyperthermia in combination with low-dose radiation therapy for palliation of superficially localized metastases

    International Nuclear Information System (INIS)

    Owczarek, G.; Miszczyk, L.

    2005-01-01

    Full text: The aim of this study is to evaluate the response of superficially located metastases and local toxicity to microwave hyperthermia combined with radiation therapy. From May 2003 through December 2004 58 patients (33 male, 25 female; mean age 60 years) with lymph nodes or skin metastases were treated with microwave superficial hyperthermia combined with low-dose radiation therapy. Hyperthermia was administered twice weekly with high frequency applicator (∼900 Mhz) with water bolus. The temperature was set to 43 o C for 45 minutes. Radiotherapy was performed daily with dose 2 Gy or 4 Gy per fraction, to a total dose 20 Gy. There were 47 patients with carcinoma, 4 with sarcoma, 7 with melanoma. Treated regions were: head and neck (37 patients), chest wall 8, abdomen wall and groins 4, upper and lower limb 2 and 8 patients respectively. Primary tumor sites were: head and neck region (9 patients), lung 15, alimentary tract 8, breast 5, soft tissue 8, urogenital 4 and 9 patients with primary tumor site unknown. The toxicity was evaluated using 6 step scale: 0-no skin reaction, 1-faint red mark, 2-distinct red mark, 3-blisters, 4-brown mark, 5-necrosis. Presence of pain and its intensity were also analyzed. Diameter of tumor after the treatment was observed. Complete response was achieved in 5 patients (8.5 %), and partial response in 29 patients (50 %), no response was observed in 12 patients (20 %) and progression of tumor in 7 patients (12 %). No skin reaction was observed in 3 patients, faint red mark in 14 patients, distinct red mark in 28 patients, blisters in 8 patients, brown mark in 4 patients and necrosis in 1 patient. The pain occurred in 9 patients but it was no the cause of stopping treatment. Local superficial hyperthermia combined with low-dose radiation therapy is an effective method of treatment in a proportion of patients with superficial metastases. This combination of treatment modalities is well tolerated and is useful for palliation

  4. Mycological Considerations in the Topical Treatment of Superficial Fungal Infections.

    Science.gov (United States)

    Rosen, Ted

    2016-02-01

    Trichophyton rubrum remains the most common pathogenic dermatophyte in the United States, Europe, and industrialized Asia, although other species are predminant elsewhere. Candida albicans is the most common pathogenic yeast, with other species occasionally encountered. Just a few of the 14 described species of Malassezia cause pityriasis versicolor worldwide. FDA approval does not always accurately reflect the potential utility of any given topical antifungal agent. Azole, hydroxypyridone, and allylamine agents are beneficial in the management of dermatophytosis; however, the allylamines may lead to faster symptom resolution and a higher degree of sustained response. Although in actual clinical use the allylamines have all shown some activity against superficial cutaneous candidiasis and pityriasis versicolor, the azole agents remain drugs of choice. Ciclopirox is an excellent broad-spectrum antifungal agent. Optimal topical therapy for superficial fungal infections cannot yet be reliably based upon in-vitro laboratory determination of sensitivity. Inherent antibacterial and anti-inflammatory properties possessed by some antifungal agents may be exploited for clinical purposes. Candida species may be azole-insensitive due to efflux pumps or an altered target enzyme. So-called "antifungal resistance" of dermatophyets is actually due to poor patient adherence (either in dosing or treatment duration), or to reinfection.

  5. Superficially located enlarged lymphoid follicles characterise nodular gastritis.

    Science.gov (United States)

    Okamura, Takuma; Sakai, Yasuhiro; Hoshino, Hitomi; Iwaya, Yugo; Tanaka, Eiji; Kobayashi, Motohiro

    2015-01-01

    Nodular gastritis is a form of chronic Helicobacter pylori gastritis affecting the gastric antrum and characterised endoscopically by the presence of small nodular lesions resembling gooseflesh. It is generally accepted that hyperplasia of lymphoid follicles histologically characterises nodular gastritis; however, quantitative analysis in support of this hypothesis has not been reported. Our goal was to determine whether nodular gastritis is characterised by lymphoid follicle hyperplasia.The number, size, and location of lymphoid follicles in nodular gastritis were determined and those properties compared to samples of atrophic gastritis. The percentages of high endothelial venule (HEV)-like vessels were also evaluated.The number of lymphoid follicles was comparable between nodular and atrophic gastritis; however, follicle size in nodular gastritis was significantly greater than that seen in atrophic gastritis. Moreover, lymphoid follicles in nodular gastritis were positioned more superficially than were those in atrophic gastritis. The percentage of MECA-79 HEV-like vessels was greater in areas with gooseflesh-like lesions in nodular versus atrophic gastritis.Superficially located hyperplastic lymphoid follicles characterise nodular gastritis, and these follicles correspond to gooseflesh-like nodular lesions observed endoscopically. These observations suggest that MECA-79 HEV-like vessels could play at least a partial role in the pathogenesis of nodular gastritis.

  6. Aneurysms of the superficial venous system: classification and treatment

    Directory of Open Access Journals (Sweden)

    Ronald G. Bush

    2014-11-01

    Full Text Available Superficial venous aneurysms are rarely described and they may remain indolent or become the source for pulmonary emboli. A system of classification and treatment protocol according to size and location is proposed. Three hundred thirty patients were evaluated for symptomatic venous disease (C2-C6 over a 2-year period. A proposed designation for venous aneurysm is described. Patients fulfilling this criterion are described in reference to site of involvement, histologic findings, and method of treatment. Five percent of patients met the criteria for venous aneurysm. Nine aneurysms of the greater saphenous vein were identified. Three aneurysms were proximal to the subterminal valve and the rest were distal. Six aneurysms of the anterior accessory greater saphenous vein (AAGSV were identified. Three aneurysms of the AAGSV spontaneously thrombosed. Two patients presented with aneurysms of the small saphenous vein. Histology revealed thickened intima, smooth muscle and adventitia. Aneurysm designation relates to diameter of normal and contiguous vein. All superficial venous aneurysms in close proximity to the junction of the femoral or popliteal vein should be ligated. Classification of venous aneurysms should include the AAGSV, which may present with spontaneous thrombosis.

  7. Optical coherence tomography and polarimetry of superficial skin biopsies

    Directory of Open Access Journals (Sweden)

    S. R. Utz

    2015-01-01

    Full Text Available The goal. Of this study was to develop and assess the efficacy of polarization probing of biotissues in vitro. The method is based on the determination of polarization parameters of scattered radiation. Materials and methods. The well-known superficial epidermis stripping method was applied using the Sulfacrylate self-sterile medical adhesive. Small portions of thin layers of the adhesive were applied to slide plates and then to different skin sites. The corneous layer in the normal condition and in case of skin diseases (psoriasis, lichen acuminatus, discoid lupus erythematosus, alopecia, itching and demodectic mange was examined based on the optical coherence tomography (OCT method using the 0CS1300SS device (Thorlabs Inc, USA. Results. The authors obtained pictures visualizing the structural organization of different layers of the epidermis using the superficial epidermis biopsy method in case of lichen acuminatus, hyperkeratosis, itching and other skin diseases. Conclusion. This method ensures non-invasive high-precision measurement of the structure of different layers of the epidermis, which may be useful both for research purposes and practical dermatology.

  8. Superficial corneal crosslinking during laser in situ keratomileusis.

    Science.gov (United States)

    Seiler, Theo G; Fischinger, Isaak; Koller, Tobias; Derhartunian, Viktor; Seiler, Theo

    2015-10-01

    To determine the safety of superficial corneal crosslinking after laser in situ keratomileusis (LASIK). Institut für Refraktive und Ophthalmo-Chirurgie, Zurich, Switzerland. Prospective study. Eyes with an ectasia risk score of 2 or higher were treated with standard LASIK (90 μm flap) for myopia correction, after which a rapid corneal crosslinking was performed in the interface (riboflavin 0.5% for 2 minutes, 9 mW/cm(2) for 5 minutes) (Group 1). The follow-up was up to 1 year. The prevalence of complications was statistically compared with that in a group of eyes matched regarding age, sex, and attempted refractive correction that were treated with standard LASIK only (Group 2). One month postoperatively, 5 eyes in Group 1 lost 1 line of corrected distance visual acuity (CDVA) compared with 1 eye in Group 2 (P rate of less than 5%. The refractive success was identical in both groups. Early postoperative complications such as erosions (16%), diffuse lamellar keratitis (DLK) stage 1 (38%), and DLK stage 2 (5%) were statistically significantly more frequent after superficial corneal crosslinking, leading to a statistically significantly reduced uncorrected distance visual acuity at 1 month (P interest in any material or method mentioned. Copyright © 2015 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved.

  9. El peronismo revisitado: Rupturas y continuidades de un debate que no pierde su centralidad The Peronism Revisited: Breaks and Continuations of a Central Debate

    Directory of Open Access Journals (Sweden)

    María Teresa Brachetta

    2008-12-01

    .This article explores the deep renovation in the ideological-cultural field that accompanies the return to democracy in the country, as well as the processes that bring about the formation of a new "cultural atmosphere". Besides, through the conceptual and methodological news in the field, it analyses the production that aims at revisiting Peronism at that time. In so doing, it attempts to tackle the continuity of the lines of the debate that started in previous decades, as well as a whole new line that at the beginning of the 80s began with the analyses of the "cultural battle" between politicians and intellectuals brought about by Peronism after its first decline. The magnetism of Peronism over the historiographical field in the 60s and 70s acquires a renewed vigour in the 80s, due to the political and ideological disputes and controversies in the interior of this political tradition in the period of the democratic transition. This new production is undoubtedly a fundamental chapter in the historiography of Peronism, which continues in the following decades and inspires new readings. In this sense, this article attempts to join old and new ideas in the historiographical field, modulated by the changes in Peronism as a political force since its electoral defeat against Radicalism in 1983.

  10. Streamlined Modeling for Characterizing Spacecraft Anomalous Behavior

    Science.gov (United States)

    Klem, B.; Swann, D.

    2011-09-01

    Anomalous behavior of on-orbit spacecraft can often be detected using passive, remote sensors which measure electro-optical signatures that vary in time and spectral content. Analysts responsible for assessing spacecraft operational status and detecting detrimental anomalies using non-resolved imaging sensors are often presented with various sensing and identification issues. Modeling and measuring spacecraft self emission and reflected radiant intensity when the radiation patterns exhibit a time varying reflective glint superimposed on an underlying diffuse signal contribute to assessment of spacecraft behavior in two ways: (1) providing information on body component orientation and attitude; and, (2) detecting changes in surface material properties due to the space environment. Simple convex and cube-shaped spacecraft, designed to operate without protruding solar panel appendages, may require an enhanced level of preflight characterization to support interpretation of the various physical effects observed during on-orbit monitoring. This paper describes selected portions of the signature database generated using streamlined signature modeling and simulations of basic geometry shapes apparent to non-imaging sensors. With this database, summarization of key observable features for such shapes as spheres, cylinders, flat plates, cones, and cubes in specific spectral bands that include the visible, mid wave, and long wave infrared provide the analyst with input to the decision process algorithms contained in the overall sensing and identification architectures. The models typically utilize baseline materials such as Kapton, paints, aluminum surface end plates, and radiators, along with solar cell representations covering the cylindrical and side portions of the spacecraft. Multiple space and ground-based sensors are assumed to be located at key locations to describe the comprehensive multi-viewing aspect scenarios that can result in significant specular reflection

  11. Systematic Serendipity: A Method to Discover the Anomalous

    Science.gov (United States)

    Giles, Daniel; Walkowicz, Lucianne

    2018-01-01

    One of the challenges in the era of big data astronomical surveys is identifying anomalous data, data that exhibits as-of-yet unobserved behavior. These data may result from systematic errors, extreme (or rare) forms of known phenomena, or, most interestingly, truly novel phenomena that has historically required a trained eye and often fortuitous circumstance to identify. We describe a method that uses machine clustering techniques to discover anomalous data in Kepler lightcurves, as a step towards systematizing the detection of novel phenomena in the era of LSST. As a proof of concept, we apply our anomaly detection method to Kepler data including Boyajian's Star (KIC 8462852). We examine quarters 4, 8, 11, and 16 of the Kepler data which contain Boyajian’s Star acting normally (quarters 4 and 11) and anomalously (quarters 8 and 16). We demonstrate that our method is capable of identifying Boyajian’s Star’s anomalous behavior in quarters of interest, and we further identify other anomalous light curves that exhibit a range of interesting variability.

  12. Myxoid stroma and delicate vasculature of a superficial angiomyxoma give rise to the red planet sign

    OpenAIRE

    Green, Margaret; Logemann, Nichola; Sulit, Daryl J

    2014-01-01

    Superficial angiomyxomas are uncommon benign mesenchymal tumors. They often recur locally if partially removed. This case report demonstrates not only the characteristic pathological findings of a superficial angiomyxoma in a 33- year-old man, but also shows a unique dermatoscopic image, which in our estimation resembles a celestial red planet such as the blood moon seen during a lunar eclipse. We propose to call this the “red planet” sign for a superficial angiomyxoma on dermoscopic examinat...

  13. Myxoid stroma and delicate vasculature of a superficial angiomyxoma give rise to the red planet sign.

    Science.gov (United States)

    Green, Margaret; Logemann, Nichola; Sulit, Daryl J

    2014-09-16

    Superficial angiomyxomas are uncommon benign mesenchymal tumors. They often recur locally if partially removed. This case report demonstrates not only the characteristic pathological findings of a superficial angiomyxoma in a 33- year-old man, but also shows a unique dermatoscopic image, which in our estimation resembles a celestial red planet such as the blood moon seen during a lunar eclipse. We propose to call this the "red planet" sign for a superficial angiomyxoma on dermoscopic examination.

  14. Two Crosslinking Technologies for Superficial Reticular Dermis Injection: A Comparative Ultrasound and Histologic Study

    OpenAIRE

    Micheels, Patrick; Besse, Stéphanie; Sarazin, Didier

    2017-01-01

    Background: Few hyaluronic acid fillers have been developed for superficial injection. Objective: To compare the diffusion and integration properties of cohesive polydensified matrix and Vycross® technology hyaluronic acid fillers with lidocaine following injection into the superficial reticular dermis. Methods and materials: Two subjects received two injections each of cohesive polydensified matrix and Vycross® hyaluronic acid (0.2mL/site) in the superficial reticular dermis of the buttock u...

  15. Rehabilitación implantosoportada en el colgajo libre de peroné Implant-supported rehabilitation using the fibula free flap

    Directory of Open Access Journals (Sweden)

    C. Navarro Cuéllar

    2006-10-01

    Full Text Available El colgajo de peroné ha demostrado ser el más versatil para la reconstrucción oromandibular, gracias a la gran longitud ósea que podemos utilizar y a la posibilidad de incorporar una amplia paleta cutánea para cobertura de tejidos blandos intraorales. El uso de implantes dentales osteointegrados proporciona un importante método terapéutico para la rehabilitación oral de estos pacientes. Los implantes osteointegrados proporcionan la forma más rígida de estabilización protésica para soportar las fuerzas masticatorias. Estos implantes pueden ser insertados de forma inmediata o diferida. A la hora de utilizar el colgajo libre de peroné realizamos la implantología de forma diferida a los 6-12 meses debido a la gran cantidad de material de osteosíntesis necesaria para la fijación del colgajo. Cuatro o seis meses después, cuando el proceso de osteointegración ha ocurrido, los implantes son cargados con una rehabilitación dental. Analizamos 12 casos de reconstrucción mandibular con colgajo libre de peroné y su rehabilitación estética y funcional con implantes osteointegrados y un seguimiento mínimo de 2 años. Se han colocado un total de 56 implantes, presentando todos ellos excepto uno, una correcta osteointegración. Todos estos pacientes han recuperado la función masticatoria, y mejorado de forma considerable la competencia labial, la continencia salival, la pronunciación y la armonía facial.Free fibula flap has proved to be one of the most versatile for oromandibular reconstruction due to the available length of bone and the possibility of incorporating a long skin paddle to cover intraoral soft tissues. The use of osseointegrated dental implants is an important technique for the oral rehabilitation of these patients. Osseointegrated implants provide the most rigid prosthetic stabilization available to withstand masticatory forces.These implants can be placed immediately or in a second time procedure.In our case

  16. Understanding the three-dimensional anatomy of the superficial lymphatics of the limbs.

    Science.gov (United States)

    Tourani, Saam S; Taylor, G Ian; Ashton, Mark W

    2014-11-01

    There are minimal data in the current literature regarding the depth of the superficial lymphatic collectors of the limbs in relation to the various subcutaneous tissue layers. Injection, microdissection, radiographic, and histologic studies of the superficial lymphatics and the subcutaneous tissues of 32 limbs from 15 human cadavers were performed. Five layers were consistently identified in the integument of all the upper and lower limb specimens: (1) skin, (2) subcutaneous fat, (3) superficial fascia, (4) loose areolar tissue, and (5) deep fascia. Layer 2 was further divided into superficial (2a) and deep (2c) compartments by a thin, transparent, horizontal septum (layer 2b). The main superficial veins and the superficial nerves coursed in layer 4. The lymphatic collectors were found at layer 2c and layer 4. The use of consistent nomenclature to describe the subcutaneous tissue layers facilitates a greater understanding and discussion of the anatomy. In lymphovenous anastomosis for the treatment of lymphedema, indocyanine green lymphography is an unreliable method for identification of the superficial collectors of the thigh. The medial proximal leg, the dorsum of the wrist over the anatomical snuffbox, and the volar proximal forearm provide suitable areas for locating superficial collectors with nearby matching size veins. In vertical medial thigh lift, choosing a dissection plane superficial to the great saphenous vein is unlikely to preserve the collectors of the ventromedial bundle.

  17. A variable-order fractal derivative model for anomalous diffusion

    Directory of Open Access Journals (Sweden)

    Liu Xiaoting

    2017-01-01

    Full Text Available This paper pays attention to develop a variable-order fractal derivative model for anomalous diffusion. Previous investigations have indicated that the medium structure, fractal dimension or porosity may change with time or space during solute transport processes, results in time or spatial dependent anomalous diffusion phenomena. Hereby, this study makes an attempt to introduce a variable-order fractal derivative diffusion model, in which the index of fractal derivative depends on temporal moment or spatial position, to characterize the above mentioned anomalous diffusion (or transport processes. Compared with other models, the main advantages in description and the physical explanation of new model are explored by numerical simulation. Further discussions on the dissimilitude such as computational efficiency, diffusion behavior and heavy tail phenomena of the new model and variable-order fractional derivative model are also offered.

  18. Microinstability-based model for anomalous thermal confinement in tokamaks

    Energy Technology Data Exchange (ETDEWEB)

    Tang, W.M.

    1986-03-01

    This paper deals with the formulation of microinstability-based thermal transport coefficients (chi/sub j/) for the purpose of modelling anomalous energy confinement properties in tokamak plasmas. Attention is primarily focused on ohmically heated discharges and the associated anomalous electron thermal transport. An appropriate expression for chi/sub e/ is developed which is consistent with reasonable global constraints on the current and electron temperature profiles as well as with the key properties of the kinetic instabilities most likely to be present. Comparisons of confinement scaling trends predicted by this model with the empirical ohmic data base indicate quite favorable agreement. The subject of anomalous ion thermal transport and its implications for high density ohmic discharges and for auxiliary-heated plasmas is also addressed.

  19. Microinstability-based model for anomalous thermal confinement in tokamaks

    International Nuclear Information System (INIS)

    Tang, W.M.

    1986-03-01

    This paper deals with the formulation of microinstability-based thermal transport coefficients (chi/sub j/) for the purpose of modelling anomalous energy confinement properties in tokamak plasmas. Attention is primarily focused on ohmically heated discharges and the associated anomalous electron thermal transport. An appropriate expression for chi/sub e/ is developed which is consistent with reasonable global constraints on the current and electron temperature profiles as well as with the key properties of the kinetic instabilities most likely to be present. Comparisons of confinement scaling trends predicted by this model with the empirical ohmic data base indicate quite favorable agreement. The subject of anomalous ion thermal transport and its implications for high density ohmic discharges and for auxiliary-heated plasmas is also addressed

  20. Anomalous Hall effect and Nernst effect in itinerant ferromagnets

    International Nuclear Information System (INIS)

    Miyasato, T.; Abe, N.; Fujii, T.; Asamitsu, A.; Onose, Y.; Onoda, S.; Nagaosa, N.; Tokura, Y.

    2007-01-01

    Anomalous Hall effect (AHE) and anomalous Nernst effect (ANE) in many ferromagnetic metals including pure metals, oxides, and chalcogenides, are studied to obtain unified understandings of their origins. We show the universal behavior of anomalous Hall conductivity σ xy as a function of longitudinal conductivity σ xx over six orders of magnitude, which is well reproduced by a recent theory assuming both the intrinsic and extrinsic contributions to the AHE. ANE is closely related with AHE and gives us further information about the electronic state in the ground state of ferromagnets. The temperature dependence of transverse Peltier coefficient α xy shows almost similar behavior among various ferromagnets, and this behavior is expected from a conventional Boltzmann transport theory

  1. Anomalous Hall effect and Nernst effect in itinerant ferromagnets

    International Nuclear Information System (INIS)

    Asamitsu, A.; Miyasato, T.; Abe, N.; Fujii, T.; Onose, Y.; Onoda, S.; Nagaosa, N.; Tokura, Y.

    2007-01-01

    Anomalous Hall effect (AHE) and anomalous Nernst effect (ANE) in many ferromagnetic metals including pure metals, oxides, and calcogenides, are studied to obtain unified understandings of their origins. We show the universal behavior of anomalous Hall conductivity σ xy as a function of longitudinal conductivity σ xx over six orders of magnitude, which is well reproduced by rigorous unified theory assuming both intrinsic and extrinsic contributions to the AHE. ANE is closely related with AHE and gives us further information about the electronic state in the ground state of ferromagnets. The temperature dependence of transverse Peltier coefficient α xy shows almost similar behavior among various ferromagnets and this behavior is expected from a conventional Boltzmann transport theory

  2. Anomalous control: when 'free-will' is not conscious.

    Science.gov (United States)

    Haggard, Patrick; Cartledge, Peter; Dafydd, Meilyr; Oakley, David A

    2004-09-01

    The conscious feeling of exercising 'free-will' is fundamental to our sense of self. However, in some psychopathological conditions actions may be experienced as involuntary or unwilled. We have used suggestion in hypnosis to create the experience of involuntariness (anomalous control) in normal participants. We compared a voluntary finger movement, a passive movement and a voluntary movement suggested by hypnosis to be 'involuntary.' Hypnosis itself had no effect on the subjective experience of voluntariness associated with willed movements and passive movements or on time estimations of their occurrence. However, subjective time estimates of a hypnotically-suggested, 'involuntary' finger movement were more similar to those for passive movements than for voluntary movements. The experience of anomalous control is qualitatively and quantitatively different from the normal conscious experience of a similar act produced intentionally. The experience of anomalous control may be produced either by pathology, or, in our case, by suggestion.

  3. The anomalous self-diffusion in α-Zr

    International Nuclear Information System (INIS)

    Hood, G.M.

    1985-01-01

    In a very recent publication, Horvath, Dyment and Mehrer, henceforth HDM, presented measurements of the self-diffusion coefficient Dsub(m) 0 for α-Zr as a function of temperature. The results of that study, done on a single crystal sample, were anomalous in the sense that a plot of log Dsub(m) 0 vs. 1/T(K -1 ) was not only non-linear, but exhibited two regions of downward curvature with increasing 1/T. HDM indicated that they were unable to see any explanation of their anomalous self-diffusion results. It is the purpose of this letter to indicate a means whereby these anomalous results may be ''explained'' and to suggest some experiments which might be undertaken to test the proposal. (orig./RK)

  4. Self-similar Gaussian processes for modeling anomalous diffusion

    Science.gov (United States)

    Lim, S. C.; Muniandy, S. V.

    2002-08-01

    We study some Gaussian models for anomalous diffusion, which include the time-rescaled Brownian motion, two types of fractional Brownian motion, and models associated with fractional Brownian motion based on the generalized Langevin equation. Gaussian processes associated with these models satisfy the anomalous diffusion relation which requires the mean-square displacement to vary with tα, 0Brownian motion and time-rescaled Brownian motion all have the same probability distribution function, the Slepian theorem can be used to compare their first passage time distributions, which are different. Finally, in order to model anomalous diffusion with a variable exponent α(t) it is necessary to consider the multifractional extensions of these Gaussian processes.

  5. Photoluminescence of acupoint 'Waiqiu' in human superficial fascia

    International Nuclear Information System (INIS)

    Zhang Yuan; Yan Xiaohui; Liu Chenglin; Dang Ruishan; Zhang Xinyi

    2006-01-01

    The spectral characters of an acupuncture point named 'Waiqiu' in superficial fascia tissue have been studied by photoluminescence (PL) spectroscopy under the excitation of 457.9 nm. The PL around 'Waiqiu' acupuncture point consists of two sub-bands resulting from the flavin adenine dinucleotide (FAD) and phospholipids, and the porphyrins (including purine, isoxanthopterin and tryptophan), respectively. More emission due to FAD and phospholipids is found inside the acupuncture effect area of 'Waiqiu' than its marginal or outside acupuncture regions. The ratio of emission intensity of FAD and phospholipids to one of porphyrins gradually decreases along the direction away from the center of the acupuncture point. It implies that the component proportion changes between FAD, phospholipids and porphyrins around the 'Waiqiu' acupuncture point. We suggest that there might be a certain relationship between redox function of FAD and 'Waiqiu' acupuncture effect

  6. Superficial Granulomatous Pyoderma Gangrenosum of the Penis: A Case Report

    Directory of Open Access Journals (Sweden)

    Shyamala S. Gopi

    2006-01-01

    Full Text Available Classic type of pyoderma gangrenosum (PG is an uncommon ulceronecrotic cutaneous disease of uncertain aetiology characterised by broad zones of confluent ulceration with violaceous undermined margins. Some 50% of cases are associated with systemic diseases. The superficial granulomatous variant of pyoderma gangrenosum (SGPG of the external genitalia is extremely rare Patients with this condition develop single or multiple ulcerated skin lesions often with sinus tract formation. The majority of these lesions were found on the trunk and limbs. SGPG is less likely to be associated with underlying disease processes than classic PG. We present a 58 year-old with recalcitrant penile ulceration demonstrated to be SGPG on biopsy. Although rare and poorly recognised, the histological features are sufficiently typical to allow the correct diagnosis to be established.

  7. Pelvic floor tenderness in the etiology of superficial dyspareunia.

    Science.gov (United States)

    Yong, Paul J; Mui, Justin; Allaire, Catherine; Williams, Christina

    2014-11-01

    To calculate the prevalence of pelvic floor tenderness in the population of women with pelvic pain and to determine its implications for symptoms of pelvic pain. We conducted a retrospective review of patients with pelvic pain at a tertiary referral centre. Pelvic floor tenderness was defined as levator ani tenderness on at least one side during single digit pelvic examination. The prevalence of pelvic floor tenderness in this cohort of women with pelvic pain was compared with the prevalence in a cohort of women without pain attending a gynaecology clinic. In the women with pelvic pain, multiple regression was performed to determine which variables were independently associated with pelvic floor tenderness. The prevalence of pelvic floor tenderness was 40% (75/189) in the cohort with pelvic pain, significantly greater than the prevalence of 13% (4/32) in the cohort without pain (OR 4.61; 95% CI 1.55 to 13.7, P = 0.005). On multiple logistic regression, superficial dyspareunia (OR 4.45; 95% CI 1.86 to 10.7, P = 0.001), abdominal wall pain (OR 4.04; 95% CI 1.44 to 11.3, P = 0.005), and bladder base tenderness (OR 4.65; 95% CI 1.87 to 11.6, P = 0.001) were independently associated with pelvic floor tenderness. Pelvic floor tenderness was similarly present in women with or without underlying endometriosis. Pelvic floor tenderness is common in women with pelvic pain, with or without endometriosis, and is a contributor to superficial dyspareunia. Pelvic floor tenderness was also associated with abdominal wall pain and bladder base tenderness, suggesting that nervous system sensitization is involved in the etiology of pelvic floor tenderness.

  8. Excimer laser superficial keratectomy for proud nebulae in keratoconus.

    Science.gov (United States)

    Moodaley, L; Liu, C; Woodward, E G; O'Brart, D; Muir, M K; Buckley, R

    1994-06-01

    Contact lens intolerance in keratoconus may be due to the formation of a proud nebula at or near the apex of the cone. Excimer laser superficial keratectomy was performed as an outpatients with proud nebulae as treatment patients with proud nebulae as treatment for their contact lens intolerance. The mean period of contact lens wear before the development of intolerance was 13.4 years (range 2 to 27 years). Following the development of intolerance, three patients abandoned contact lens wear in the affected eye while the remainder experienced a reduction in comfortable wearing time (mean = 3.75 hours; range: 0-14 hours). All patients had good potential Snellen visual acuity with a contact lens of 6/9 (nine eyes) and 6/12 (one eye). The proud nebulae were directly ablated with a 193 nm ArF excimer laser using a 1 mm diameter beam. Between 100-150 pulses were sufficient to ablate the raised area. Patients experienced no pain during the procedure and reported minimal discomfort postoperatively. In all cases flattening of the proud nebulae was achieved. Seven patients were able to resume regular contact lens wear (mean wearing time = 10.17 hours; range 8 to 16 hours). In three patients, resumption of contact lens wear was unsuccessful because of cone steepness. All patients achieved postoperative Snellen visual acuity of 6/12 or better with a contact lens. Four patients experienced a loss of one line in Snellen acuity. The mean follow up period was 8.3 months (range 2 to 17 months). Excimer laser superficial keratectomy is a useful technique for the treatment of contact lens intolerance caused by proud nebulae in patients with keratoconus. Penetrating keratoplasty is thus avoided.

  9. [Recanalization of superficial femoral artery occlusions with Outback LTD catheter].

    Science.gov (United States)

    Zhang, Hong-peng; Guo, Wei; Liu, Xiao-ping; Yin, Tai; Jia, Xin; Wang, Li-jun; Xiong, Jiang; Ma, Xiao-hui

    2012-03-01

    To evaluate immediate- and median-term outcomes from subintimal recanalization of superficial femoral arteries (SFA) chronic total occlusions (CTO) with the Outback LTD catheter. From January 2010 to May 2011, 35 legs in 30 patients with CTO of the SFA and proximal popliteal artery were treated by Outback LTD catheter. There were 20 male and 10 female patients. The mean age of the patients was 68 years. Clinical presentation was severe intermittent claudication (Rutherford category 3, 10/35, 28.6%), rest pain (Rutherford category 4, 13/35, 37.1%), and minor ulceration (Rutherford category 5, 12/35, 34.3%). In all cases, the true lumen could not be entered by using standard antegrade catheter and guide wire techniques. Technical success, complications, procedure times, clinical outcomes and cumulative patency rates in follow-up were evaluated. Median lesion length was (210 ± 15) mm. Recanalization of the arterial occlusion was successful in 34 of 35 treated lesions (97.1%). None of the 30 patients showed any procedure-related complications during or after treatment. The mean follow-up was (7.2 ± 0.3) months. Cumulative primary patency rates after 3, 6, and 12 months were 90.9%, 84.8% and 50.6%. Three minor toe amputations and one major below-the-knee amputation were observed in patients with critical limb ischemia. The Outback LTD catheter is a safe and effective device to recanalize challenging superficial femoral arteries CTO. The technique could reduce radiation exposure time and raise the technique success rate.

  10. Total Anomalous Pulmonary Venous Connection to the Portal Vein

    International Nuclear Information System (INIS)

    Wyttenbach, Marina; Carrel, Thierry; Schuepbach, Peter; Tschaeppeler, Heinz; Triller, Juergen

    1996-01-01

    Anomalous pulmonary venous return represents a rare congenital anomaly with wide anatomic and physiologic variability. We report a case of a newborn with a rare form of total infracardiac anomalous pulmonary venous connection (TAPVC). The pulmonary veins draining both lungs formed two vertical veins, which joined to a common pulmonary trunk below the diaphragm. This venous channel connected to the portal vein through the esophageal hiatus. The diagnosis was suggested by color Doppler sonography and confirmed by intravenous digital subtraction angiography, which allowed definition of the anatomy

  11. Anomalous tensoelectric effects in gallium arsenide tunnel diodes

    Energy Technology Data Exchange (ETDEWEB)

    Alekseeva, Z.M.; Vyatkin, A.P.; Krivorotov, N.P.; Shchegol' , A.A.

    1988-02-01

    Anomalous tensoelectric phenomena induced in a tunnel p-n junction by a concentrated load and by hydrostatic compression were studied. The anomalous tensoelectric effects are caused by the action of concentrators of mechanical stresses in the vicinity of the p-n junction, giving rise to local microplastic strain. Under the conditions of hydrostatic compression prolate inclusions approx.100-200 A long play the role of concentrators. Analysis of irreversible changes in the current-voltage characteristics of tunnel p-n junctions made it possible to separate the energy levels of the defects produced with plastic strain of gallium arsenide.

  12. Colgajo libre osteoseptocutáneo de peroné en la reconstrucción primaria de la radionecrosis masiva mandibular Fibular osteoseptocutaneous free flap in the primary reconstruction after massive radionecrosis of the mandible

    Directory of Open Access Journals (Sweden)

    P. Infante Cossío

    2004-06-01

    Full Text Available Resumen: Una de las complicaciones más serias del uso de la radioterapia en el tratamiento del carcinoma epidermoide de la cavidad oral, es la osteorradionecrosis. En este trabajo, presentamos cuatro pacientes afectos de osteorradionecrosis masiva de la mandíbula que habían fracasado inicialmente con medidas conservadoras y que fueron tratados con resección radical y reconstrucción primaria con un colgajo libre osteoseptocutáneo de peroné. El defecto mandibular tras la resección ósea midió una media de 10 cm e incluyó mucosa intraoral, piel o ambos. En dos casos de reconstrucción, se empleó el colgajo libre de peroné con doble paleta para reconstruir defectos extensos intra y extraorales. Se realizaron osteotomías en el peroné vascularizado en todos los casos para recrear el contorno mandibular. Todos los colgajos sobrevivieron completamente. Tres pacientes curaron primariamente con buenos resultados estéticos y funcionales. Una paciente falleció en el primer mes tras la operación por una pancreatitis aguda y fallo renal. En un paciente se han insertado implantes osteointegrados. En nuestra experiencia, el colgajo libre osteoseptocutáneo de peroné puede ser una opción ideal para la reconstrucción en un solo tiempo de defectos complejos mandibulares compuestos en pacientes afectos de osteorradionecrosis masiva.Abstract: Osteoradionecrosis is one of the most serious complications after radiation therapy of squamous carcinoma of the oral cavity. In this article, we report four cases of massive osteoradionecrosis of the mandible, all of whom had failed initial conservative management and treated with radical resection and primary reconstructed with fibular osteoseptocutaneous free flap. Mandible defects after radical resection were around 10 cm long and included intraoral mucosa, skin or both. A doubled-paddle peroneal tissue transfer was used in two cases for reconstruction of an extensive extra- or intraoral defects. The

  13. Patterns of detection of superficial spreading and nodular-type melanoma: a multicenter Italian study.

    Science.gov (United States)

    Carli, Paolo; De Giorgi, Vincenzo; Palli, Domenico; Maurichi, Andrea; Mulas, Patrizio; Orlandi, Catiuscia; Imberti, Gianlorenzo; Stanganelli, Ignazio; Soma, Pierfranco; Dioguardi, Domenico; Catricalá, Caterina; Betti, Roberto; Paoli, Simone; Bottoni, Ugo; Lo Scocco, Giovanni; Scalvenzi, Massimiliano; Giannotti, Benvenuto

    2004-11-01

    Nodular histotype represents the condition that is mostly associated with diagnosis of thick melanoma. The objectives were to evaluate variables associated with and pattern of detection of nodular melanomas and to investigate variables associated with early diagnosis in accordance with histotype (nodular vs. superficial spreading melanomas). From the original data set of 816 melanomas, all the invasive lesions classified as superficial spreading (n=500) and nodular (n=93) melanomas were considered for the study. A multivariate logistic analysis was performed. Results. Nodular melanomas did not significantly differ from superficial spreading melanomas regarding sex, anatomic site, number of whole-body nevi, and the presence of atypical nevi. As expected, nodular melanomas were represented by a higher percentage of thick (>2 mm) lesions compared to superficial spreading melanomas (64.5% vs. 9.6%, pnodular and superficial spreading melanomas, the former being more frequently self-detected (44.1% vs. 38.0%) or detected by the family doctor (34.4% vs. 11.4%). Female sex, high level of education, and detection made by a dermatologist had an independent, protective effect against late (>1 mm in thickness) diagnosis in superficial spreading melanomas. No protective variable associated with nodular melanomas was found. Patterns of detection for nodular melanomas significantly differ from those for superficial spreading melanomas. For superficial spreading, but not for nodular, melanomas, variables associated with protective effect against late diagnosis can be identified.

  14. Features of wound healing shown by fibroblasts obtained from the superficial and deep dermis.

    Science.gov (United States)

    Kaminishi-Tanikawa, Akiko; Kurita, Masakazu; Okazaki, Mutsumi; Kawaguchi, Runa; Ihara, Aki; Niikura, Mamoru; Takushima, Akihiko; Harii, Kiyonori

    2011-09-01

    Dermal fibroblasts (DF) obtained from the superficial dermal layer and those from the deep dermal layer have different cellular functions. These differences are often associated with excessive scarring; they also influence early wound healing. We therefore investigated the differences between superficial and deep dermal fibroblasts with special emphasis on their contractile properties, and ability to produce connective tissue. We investigated their proliferation kinetics, ability to contract collagen lattices, and chronological mRNA expression of eight genes associated with wound healing. To estimate the changes in the differences between them during the early phase of wound healing, we investigated mRNA expression in bFGF supplemented medium because bFGF is a representative cytokine that is familiar to clinicians. Superficial DF proliferate faster than deep DF in culture, whereas deep DF are better at contracting collagen lattices than superficial ones. In realtime analysis of polymerase chain reaction, the expression of type I and III collagen, fibronectin, TGF β1 and β3, and connective tissue growth factor were higher in deep DF than in superficial DF, while the expression of TGF β2 was higher in superficial DF. After bFGF supplementation, the relative dominance of mRNA expression between superficial and deep DF remained constant except for the expression of collagenase. According to our analysis, deep DF are superior to superficial DF at promoting wound healing (particularly contraction and production of connective tissue). The intradermal distribution of DF is appropriate for efficient wound healing.

  15. Parity-violating anomalous currents in arbitrary odd dimensions from stochastic quantisation

    International Nuclear Information System (INIS)

    Zhou Jiange; Liu Yiaoyang

    1990-01-01

    The stochastic quantization method is applied to evaluate the parity-violating anomalous currents in arbitrary odd dimensions. The complete anomalous vacuum currents which have gauge and Lorentz covariance are achieved. (author)

  16. Bilaterally painful anomalous insertion of the medial meniscus in a volleyball player with Marfanoid features.

    Science.gov (United States)

    Santi, M D; Richardson, A B

    1993-01-01

    A female volleyball player with a Marfanoid habitus had bilateral symptomatic anomalous insertions of the medial meniscus. Arthroscopic resection of the anomalous portions of the medial menisci as they attached to the anterior cruciate ligament successfully eliminated her symptoms.

  17. Electric charge quantization and the muon anomalous magnetic moment

    International Nuclear Information System (INIS)

    Pires, C.A.S. de; Rodrigues da Silva, P.S.

    2002-01-01

    We investigate some proposals to solve the electric charge quantization puzzle that simultaneously explain the recent measured deviation on the muon anomalous magnetic moment. For this we assess extensions of the electro-weak standard model spanning modifications on the scalar sector only. It is interesting to verify that one can have modest extensions which easily account for the solution for both problems

  18. Comment on the Constraint for Anomalous Jacobi Identity

    Science.gov (United States)

    Hou, Bo-Yu; Zhang, Yao-Zhong

    A 4-fold identity for infinitesimal generators of finite group transformations which impose a constraint for anomalous Jacobi identity is obtained. The differences between the resulting non-associative algebra and the so-called Malcev algebra are revealed. Simple applications of our results to the translation group are also discussed.

  19. Exotic aspects of hadronic atoms-anomalous quasi-stabilities

    International Nuclear Information System (INIS)

    Yamazaki, Toshimitsu.

    1993-07-01

    Recently revealed, but hitherto unknown, new aspects of hadronic atoms, namely, anomalous quasi-stabilities of negative hadrons, are discussed. One is on long-lived antiprotonic helium atoms, characterized as 'atomic exotic halo' and the other is on deeply bound pionic atoms, characterized as 'nuclear exotic halo'. (author)

  20. Anomalous scaling of stochastic processes and the Moses effect.

    Science.gov (United States)

    Chen, Lijian; Bassler, Kevin E; McCauley, Joseph L; Gunaratne, Gemunu H

    2017-04-01

    The state of a stochastic process evolving over a time t is typically assumed to lie on a normal distribution whose width scales like t^{1/2}. However, processes in which the probability distribution is not normal and the scaling exponent differs from 1/2 are known. The search for possible origins of such "anomalous" scaling and approaches to quantify them are the motivations for the work reported here. In processes with stationary increments, where the stochastic process is time-independent, autocorrelations between increments and infinite variance of increments can cause anomalous scaling. These sources have been referred to as the Joseph effect and the Noah effect, respectively. If the increments are nonstationary, then scaling of increments with t can also lead to anomalous scaling, a mechanism we refer to as the Moses effect. Scaling exponents quantifying the three effects are defined and related to the Hurst exponent that characterizes the overall scaling of the stochastic process. Methods of time series analysis that enable accurate independent measurement of each exponent are presented. Simple stochastic processes are used to illustrate each effect. Intraday financial time series data are analyzed, revealing that their anomalous scaling is due only to the Moses effect. In the context of financial market data, we reiterate that the Joseph exponent, not the Hurst exponent, is the appropriate measure to test the efficient market hypothesis.

  1. Anomalous Dispersion of the S1 Lamb Mode

    Directory of Open Access Journals (Sweden)

    Faiz Ahmad

    2013-01-01

    Full Text Available The S1 mode of the Lamb spectrum of an isotropic plate exhibits negative group velocity in a narrow frequency domain. This anomalous behavior is explained analytically by examining the slope of each mode first in its initial state and then near its turning points.

  2. Patterns of anomalous pulmonary venous connection as seen at ...

    African Journals Online (AJOL)

    Supra-cardiac and intra-cardiac anomalous were the commonest type of TAPVC representing 43.6% and 35.9% respectively. Among all patients with TAPVC 51.35% were associated with ostium secundum atrial septal defect, 74.4% had moderate to severe pulmonary hypertension. Overall mortality was 9.25%. Mortality ...

  3. A test case for anomalous fading correction in IRSL dating

    NARCIS (Netherlands)

    Wallinga, J.; Bos, A.J.J.; Dorenbos, P.; Murray, A.S.; Schokker, J.

    2007-01-01

    Infrared-stimulated luminescence (IRSL) dating of feldspars has the potential to date deposits beyond the age range of quartz optical (OSL) dating. Successful application of feldspar IRSL dating is, however, often precluded due to anomalous-fading, the tunnelling of electrons from one defect site to

  4. Anomalous renal artery is potential cause of resistant hypertension ...

    African Journals Online (AJOL)

    Background: Drug-resistant hypertension can be attributable to secondary hypertension and other causes. Anomalous renal artery is uncommon but can be a potential cause of resistant hypertension. Case Report: We highlight the challenges in management of resistant hypertension and describe its unusual association ...

  5. Anomalous hydrocracking of triglycerides over CoMo-catalyst ...

    Indian Academy of Sciences (India)

    Keywords. Coupling reactions; hydroconversion; waxy products; reaction intermediates; triglycerides; biofuels. Abstract. Reaction intermediates have been identified and followed to understand anomalous cracking of jathropha oil triglycerides in the presence of sulphided Co-Mo/Al2O3 catalyst. Undesirable C-C coupling ...

  6. PICTORIAL ESSAY Is anomalous origin of the left vertebral artery ...

    African Journals Online (AJOL)

    Department of Diagnostic Radiology, 2 Military Hospital, Wynberg, Cape Town. Sulaiman Moosa, MB ChB, MPhil, BSc Hons, FFRad Diag (SA). Corresponding author: B van der Merwe (attiemalan@mweb.co.za). We present a pictorial review of anomalous origin of the left vertebral artery observed in 5 patients imaged in ...

  7. Acoustic metasurfaces for scattering-free anomalous reflection and refraction

    Science.gov (United States)

    Díaz-Rubio, A.; Tretyakov, S. A.

    2017-09-01

    Manipulation of acoustic wave fronts by thin and planar devices, known as metasurfaces, has been extensively studied, in view of many important applications. Reflective and refractive metasurfaces are designed using the generalized reflection and Snell's laws, which tell that local phase shifts at the metasurface supply extra momentum to the wave, presumably allowing arbitrary control of reflected or transmitted waves. However, as has been recently shown for the electromagnetic counterpart, conventional metasurfaces based on the generalized laws of reflection and refraction have important drawbacks in terms of power efficiency. This work presents a new synthesis method of acoustic metasurfaces for anomalous reflection and transmission that overcomes the fundamental limitations of conventional designs, allowing full control of acoustic energy flow. The results show that different mechanisms are necessary in the reflection and transmission scenarios for ensuring perfect performance. Metasurfaces for anomalous reflection require nonlocal response, which allows energy channeling along the metasurface. On the other hand, for perfect manipulation of anomalously transmitted waves, local and nonsymmetric response is required. These conclusions are interpreted through appropriate surface impedance models which are used to find possible physical implementations of perfect metasurfaces in each scenario. We hope that this advance in the design of acoustic metasurfaces opens new avenues not only for perfect anomalous reflection and transmission but also for realizing more complex functionalities, such as focusing, self-bending, or vortex generation.

  8. Anomalous scattering factors of some rare earth elements evaluated ...

    Indian Academy of Sciences (India)

    The real and imaginary parts, '() and ''() of the dispersion corrections to the forward Rayleigh scattering amplitude (also called anomalous scattering factors) for the elements La, Ce, Pr, Nd, Sm, Gd, Dy, Ho and Er, have been determined by a numerical evaluation of the dispersion integral that relates them through the ...

  9. Theory of anomalous transport in toroidal helical plasmas

    International Nuclear Information System (INIS)

    Itoh, K.; Itoh, S.; Fukuyama, A.

    1992-03-01

    Theoretical model of the anomalous transport in Torsatron/Heliotron plasmas is developed, based on the current-diffusive interchange instability which is destabilized due to the averaged magnetic hill near edge. Analytic formula of transport coefficient is derived. This model explains the high edge transport, the power degradation and energy confinement scaling law and the enhanced heat-pulse thermal conduction. (author)

  10. Anomalous behaviour of the Indian summer monsoon 2009

    Indian Academy of Sciences (India)

    Presence of El Niño like conditions in the Pacific and warming over the equatorial Indian Ocean altered the circulation patterns and produced an anomalous low level convergence and ascending motion over the Indian Ocean region and large scale subsidence over the Indian landmass. Furthermore, the crossequatorial ...

  11. Revisiting the Anomalous rf Field Penetration into a Warm Plasma

    Energy Technology Data Exchange (ETDEWEB)

    Igor D. Kaganovich; Oleg V. Polomarov; Constantine E. Theodosiou

    2005-06-24

    Radio-frequency [rf] waves do not penetrate into a plasma and are damped within it. The electric field of the wave and plasma current are concentrated near the plasma boundary in a skin layer. Electrons can transport the plasma current away from the skin layer due to their thermal motion. As a result, the width of the skin layer increases when electron temperature effects are taken into account. This phenomenon is called anomalous skin effect. The anomalous penetration of the rf electric field occurs not only for transversely propagating to the plasma boundary wave (inductively coupled plasmas) but also for the wave propagating along the plasma boundary (capacitively coupled plasmas). Such anomalous penetration of the rf field modifies the structure of the capacitive sheath. Recent advances in the nonlinear, non-local theory of the capacitive sheath are reported. It is shown that separating the electric field profile into exponential and non-exponential parts yields an efficient qualitative and quantitative description of the anomalous skin effect in both inductively and capacitively coupled plasma.

  12. Anomalous scattering factors of some rare earth elements evaluated

    Indian Academy of Sciences (India)

    The real and imaginary parts, '() and ''() of the dispersion corrections to the forward Rayleigh scattering amplitude (also called anomalous scattering factors) for the elements La, Ce, Pr, Nd, Sm, Gd, Dy, Ho and Er, have been determined by a numerical evaluation of the dispersion integral that relates them through the ...

  13. Explanation of Two Anomalous Results in Statistical Mediation Analysis

    Science.gov (United States)

    Fritz, Matthew S.; Taylor, Aaron B.; MacKinnon, David P.

    2012-01-01

    Previous studies of different methods of testing mediation models have consistently found two anomalous results. The first result is elevated Type I error rates for the bias-corrected and accelerated bias-corrected bootstrap tests not found in nonresampling tests or in resampling tests that did not include a bias correction. This is of special…

  14. Ion acoustic instability of HPT particles, FAC density, anomalous ...

    Indian Academy of Sciences (India)

    R. Narasimhan (Krishtel eMaging) 1461 1996 Oct 15 13:05:22

    The current driven resistivity produces parallel electric field and high power dissipation. The anomalous resistivity η, potential difference along the auroral field lines. V||, intensity of electric field turbulence E|| and power produced per unit volume P are computed. It is found that the change in westward magnetic perturbation ...

  15. Anomalous Gonadal Arteries in Relation to the Renal Vein: A ...

    African Journals Online (AJOL)

    ... in ovarian arteries on the right side; 37 (64%) of testicular arteries and 3 (27%) of ovarian arteries on the left side. Partial occlusion or compression of the renal vein due to the arching gonadal arteries could result in varicocele and hypertension. The knowledge of such anomalous is useful in surgery and human anatomy

  16. Anomalous center of mass shift: gravitational dipole moment.

    Science.gov (United States)

    Jeong, Eue Jin

    1997-02-01

    The anomalous, energy dependent shift of the center of mass of an idealized, perfectly rigid, uniformly rotating hemispherical shell which is caused by the relativistic mass increase effect is investigated in detail. It is shown that a classical object on impact which has the harmonic binding force between the adjacent constituent particles has the similar effect of the energy dependent, anomalous shift of the center of mass. From these observations, the general mode of the linear acceleration is suggested to be caused by the anomalous center of mass shift whether it's due to classical or relativistic origin. The effect of the energy dependent center of mass shift perpendicular to the plane of rotation of a rotating hemisphere appears as the non zero gravitational dipole moment in general relativity. Controlled experiment for the measurement of the gravitational dipole field and its possible links to the cylindrical type line formation of a worm hole in the extreme case are suggested. The jets from the black hole accretion disc and the observed anomalous red shift from far away galaxies are considered to be the consequences of the two different aspects of the dipole gravity.

  17. May anomalous X chromosome methylation be responsible for the ...

    Indian Academy of Sciences (India)

    Home; Journals; Journal of Genetics; Volume 87; Issue 3. May anomalous X chromosome methylation be responsible for the spontaneous abortion of a male foetus? R. Martínez V. Bonilla-Henao I. Ramos F. Sobrino M. Lucas E. Pintado. Research Note Volume 87 Issue 3 December 2008 pp 261-264 ...

  18. Functional MRI of Conventional and Anomalous Metaphors in Mandarin Chinese

    Science.gov (United States)

    Ahrens, Kathleen; Liu, Ho-Ling; Lee, Chia-Ying; Gong, Shu-Ping; Fang, Shin-Yi; Hsu, Yuan-Yu

    2007-01-01

    This study looks at whether conventional and anomalous metaphors are processed in different locations in the brain while being read when compared with a literal condition in Mandarin Chinese. We find that conventional metaphors differ from the literal condition with a slight amount of increased activation in the right inferior temporal gyrus. In…

  19. Anomalous left the pulmonary dilemma coronary artery artery from a ...

    African Journals Online (AJOL)

    Two patients had a nonspecific history of respiratory distress, failure to thrive or difficulry with feeding. Course and management (Fig. 3). Three patients underwent a reimplantation of the anomalous left coronary artery into the ascending aorta. One died at opera- tion with extending myocardial infarction related to technical.

  20. Navigation by anomalous random walks on complex networks.

    Science.gov (United States)

    Weng, Tongfeng; Zhang, Jie; Khajehnejad, Moein; Small, Michael; Zheng, Rui; Hui, Pan

    2016-11-23

    Anomalous random walks having long-range jumps are a critical branch of dynamical processes on networks, which can model a number of search and transport processes. However, traditional measurements based on mean first passage time are not useful as they fail to characterize the cost associated with each jump. Here we introduce a new concept of mean first traverse distance (MFTD) to characterize anomalous random walks that represents the expected traverse distance taken by walkers searching from source node to target node, and we provide a procedure for calculating the MFTD between two nodes. We use Lévy walks on networks as an example, and demonstrate that the proposed approach can unravel the interplay between diffusion dynamics of Lévy walks and the underlying network structure. Moreover, applying our framework to the famous PageRank search, we show how to inform the optimality of the PageRank search. The framework for analyzing anomalous random walks on complex networks offers a useful new paradigm to understand the dynamics of anomalous diffusion processes, and provides a unified scheme to characterize search and transport processes on networks.

  1. Navigation by anomalous random walks on complex networks

    Science.gov (United States)

    Weng, Tongfeng; Zhang, Jie; Khajehnejad, Moein; Small, Michael; Zheng, Rui; Hui, Pan

    2016-11-01

    Anomalous random walks having long-range jumps are a critical branch of dynamical processes on networks, which can model a number of search and transport processes. However, traditional measurements based on mean first passage time are not useful as they fail to characterize the cost associated with each jump. Here we introduce a new concept of mean first traverse distance (MFTD) to characterize anomalous random walks that represents the expected traverse distance taken by walkers searching from source node to target node, and we provide a procedure for calculating the MFTD between two nodes. We use Lévy walks on networks as an example, and demonstrate that the proposed approach can unravel the interplay between diffusion dynamics of Lévy walks and the underlying network structure. Moreover, applying our framework to the famous PageRank search, we show how to inform the optimality of the PageRank search. The framework for analyzing anomalous random walks on complex networks offers a useful new paradigm to understand the dynamics of anomalous diffusion processes, and provides a unified scheme to characterize search and transport processes on networks.

  2. Partial anomalous pulmonary venous return in Turner syndrome

    NARCIS (Netherlands)

    Hoven, A.T. van den; Chelu, R.G.; Duijnhouwer, A.L.; Demulier, L.; Devos, D.; Nieman, K.; Witsenburg, M.; Bosch, A.E. van den; Loeys, B.L.; Hagen, I.M. van; Roos-Hesselink, J.W.

    2017-01-01

    PURPOSE: The aim of this study is to describe the prevalence, anatomy, associations and clinical impact of partial anomalous pulmonary venous return in patients with Turner syndrome. METHODS AND RESULTS: All Turner patients who presented at our Turner clinic, between January 2007 and October 2015

  3. Anomalous Origin of the Subclavian Artery Associated with ...

    African Journals Online (AJOL)

    A hitherto unreported association between anomalous origin of the right subclavian artery and phocomelia of the right arm is described. The aetiology of phocomelia is briefly reviewed and the possible casual relajonship or association between phocomelia and the disturbance in vascular supply to the limb is discussed.

  4. PICTORIAL ESSAY Is anomalous origin of the left vertebral artery ...

    African Journals Online (AJOL)

    The incidence of anomalous origin of the left vertebral artery from the aortic arch ranges between 1% and 5.8%.1,2 This anomaly has important implications for thoracic surgery and interventional procedures. The left vertebral artery may originate from: • the left common carotid artery. • the root of the left subclavian artery ...

  5. Partial anomalous pulmonary venous return in Turner syndrome.

    Science.gov (United States)

    van den Hoven, Allard T; Chelu, Raluca G; Duijnhouwer, Anthonie L; Demulier, Laurent; Devos, Daniel; Nieman, Koen; Witsenburg, Maarten; van den Bosch, Annemien E; Loeys, Bart L; van Hagen, Iris M; Roos-Hesselink, Jolien W

    2017-10-01

    The aim of this study is to describe the prevalence, anatomy, associations and clinical impact of partial anomalous pulmonary venous return in patients with Turner syndrome. All Turner patients who presented at our Turner clinic, between January 2007 and October 2015 were included in this study and underwent ECG, echocardiography and advanced imaging such as cardiac magnetic resonance or computed tomography as part of their regular clinical workup. All imaging was re-evaluated and detailed anatomy was described. Partial anomalous pulmonary venous return was diagnosed in 24 (25%) out of 96 Turner patients included and 14 (58%) of these 24 partial anomalous pulmonary venous return had not been reported previously. Right atrial or ventricular dilatation was present in 11 (46%) of 24 partial anomalous pulmonary venous return patients. When studied with advanced imaging modalities and looked for with specific attention, PAPVR is found in 1 out of 4 Turner patients. Half of these patients had right atrial and/or ventricular dilatation. Evaluation of pulmonary venous return should be included in the standard protocol in all Turner patients. Copyright © 2017. Published by Elsevier B.V.

  6. Acute coronary syndrome caused by anomalous origin of the right ...

    African Journals Online (AJOL)

    Acute coronary syndrome caused by anomalous origin of the right coronary artery from the left sinus of Valsalva. AS Assiri. Abstract. No Abstract. West African Journal of Medicine Vol. 24(3) 2005: 278-279. Full Text: EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT.

  7. Vertices for correlated electron systems with anomalous propagators

    Czech Academy of Sciences Publication Activity Database

    Janiš, Václav; Pokorný, Vladislav

    2014-01-01

    Roč. 3, č. 1 (2014), "66-1"-"66-10" ISSN 2278-3393 R&D Projects: GA ČR GCP204/11/J042 Institutional support: RVO:68378271 Keywords : interacting quantum dot * superconducting leads * diagrammatic perturbation expansion * anomalous vertex functions Subject RIV: BM - Solid Matter Physics ; Magnetism http://www.cognizure.com/sj.aspx?p=200638479

  8. Anomalous electric field changes and high flash rate beneath a ...

    Indian Academy of Sciences (India)

    Home; Journals; Journal of Earth System Science; Volume 119; Issue 5. Anomalous electric field changes and high flash rate beneath a thunderstorm in northeast India ... Further,all electric field changes after a lightning discharge indicates the presence of strong Lower Positive Charge Centers (LPCC)in the active and ...

  9. Estudio del estado físico-mecánico de superficies tratadas por deformación plástica superficial. // Study of the mechanical and physical behavior of surfaces treated by superficial plastic deformation.

    Directory of Open Access Journals (Sweden)

    O. Boada Carrazana

    2003-05-01

    Full Text Available El presente trabajo aborda lo referente al estado del arte de la modelación y el comportamiento de las superficies tratadapor deformación plástica superficial (DPS. Se hace una breve descripción de la modelación elástica y plástica, de la teoríade la plasticidad y de las dislocaciones y se dan algunos resultados sobre la modelación del rodilado usando las técnicasde simulación y modelación, como el método de los elementos finitos, a partir del cual se obtienen los modelosmatemáticos para calcular las tensiones y deformaciones máximas.Palabras claves: deformación plástica superficial, rodilado, bruñido por rodillo, elementos finitos,modelación.____________________________________________________________________________Abstract.This paper deals with the state of the art of modelation and the behaviour of surfaces treated by superficial plasticdeformation. It is given a brief description of the elastic and plastic modelation, theory of plasticity and dislocations, andshowed some results about modelation of roller burnishing using simulation techniques like finite elements method toobtain the mathematics models in order to calculate the maximum stresses and strains.Key words: Superficial plastic deformation, roller burnishing, finite elements method, modelation.

  10. Cochlear implantation is a therapeutic option for superficial siderosis patients with sensorineural hearing loss.

    Science.gov (United States)

    Omichi, R; Kariya, S; Maeda, Y; Nishizaki, K

    2016-04-01

    Superficial siderosis is a rare disease that results from chronic bleeding in the subarachnoid space. Haemosiderin deposits throughout the subpial layers of the brain and spinal cord lead to progressive sensorineural hearing loss, which is seen in 95 per cent of patients with superficial siderosis. The impact of cochlear implantation on the quality of life of superficial siderosis patients is under debate. A 38-year-old male with superficial siderosis presented with bilateral progressive sensorineural hearing loss. The patient underwent cochlear implantation and his quality of life was improved as evaluated by the Abbreviated Profile of Hearing Aid Benefit inventory. The remarkable improvement in Abbreviated Profile of Hearing Aid Benefit scores shown in this study indicates that cochlear implantation leads to a better quality of life in superficial siderosis patients.

  11. [Clinical experience of penile augmentation with superficial fascia retrocession: a report of 60 cases].

    Science.gov (United States)

    Li, Xia; Wang, Hai-Tao; Yang, Jin-Cun; Huo, Ran; Zhang, Cheng; Hu, Nan

    2013-01-01

    To investigate the clinical effect of penile augmentation with superficial fascia retrocession. The first annular incision line was designed, reserving the inner plate 0.5 -0.8 cm. The second annular incision line was determined, according to the length of penile erection. The skin tissue between the double loops was stripped, reserving the superficial fascia and the superficial dorsal veins. Before the closure of two annual incision with no tension, the superficial fascia tissue was pushed proximally and fixed sectionally to augment penis. From Jun 2009 to Jun 2011, 60 patients with redundant prepuce or phimosis were treated with this method. During 3 to 12 months follow-up, the postoperative penile perimeter increased significantly. The glans were exposed and the prepuce looked smooth. The function of the penis maintained undamaged. The penile augmentation with superficial fascia retrocession can make full use of autologous tissue to augment penis, meanwhile, redundant prepuce can be resected. It is very practical for clinical application.

  12. Macromolecular X-ray structure determination using weak, single-wavelength anomalous data

    Energy Technology Data Exchange (ETDEWEB)

    Bunkóczi, Gábor; McCoy, Airlie J.; Echols, Nathaniel; Grosse-Kunstleve, Ralf W.; Adams, Paul D.; Holton, James M.; Read, Randy J.; Terwilliger, Thomas C.

    2014-12-22

    We describe a likelihood-based method for determining the substructure of anomalously scattering atoms in macromolecular crystals that allows successful structure determination by single-wavelength anomalous diffraction (SAD) X-ray analysis with weak anomalous signal. With the use of partial models and electron density maps in searches for anomalously scattering atoms, testing of alternative values of parameters and parallelized automated model-building, this method has the potential to extend the applicability of the SAD method in challenging cases.

  13. 5-Aminolevulinic acid photodynamic therapy for superficial basal cell carcinoma

    International Nuclear Information System (INIS)

    Want, David; Kennedy, James C.; Brundage, Michael; Rothwell, Deanna

    1997-01-01

    Treatment of superficial basal cell carcinoma with topical 5-aminolevulinic acid photodynamic therapy (ALA-PDT) offers an alternative to plastic surgery and radiotherapy with potential for good cosmetic outcome and local control of disease. We report our clinical experience with this technique. Patients were treated prospectively on a study protocol enrolling a total of 118 patients (63 male, 55 female) with an average age of 65 years. Consecutive patients meeting eligibility criteria were invited to participate over a four year period. Median followup was 27 months (range 1 to 76 months). In the study group, 62 patients had single lesions and 56 had multiple lesions. Of the 56 patients with multiple lesions, 33 had 2-4 lesions, 11 had 5-9, and 11 had 10 or more. All patients were treated with 20% ALA dissolved in Glaxal Base applied to the tumors for three to four hours. Following removal of the cream, fluorescence intensity and distribution were assessed using a UV-A lamp, and the lesions were exposed to photoactivating light of wavelength greater than 600 nm for a light dose ranging from 100-150 J/cm2. Lesions were reassessed in followup, and scored as complete or partial responses. At subsequent patient assessments, lesions were scored as continued complete responses or recurrences. In the patients with single lesions, there was an initial complete response rate of 90.3%. Of the 56 patients with multiple lesions, 44 had all of their lesions respond completely, and there was an overall average response rate of 95.5%. Sixty three percent of males and 44% of females had all of their lesions respond completely. (p=0.033, Chi-squared test). There was no difference in response rate with respect to age, or site of lesion. The recurrence rates were 35% for patients with single lesions, and 10.5% for patients with multiple lesions. ALA-PDT would appear to be a promising alternative to conventional treatment for superficial basal cell carcinoma. Based on these results

  14. High-lateral-tension abdominoplasty with superficial fascial system suspension.

    Science.gov (United States)

    Lockwood, T

    1995-09-01

    Modern abdominoplasty techniques were developed in the 1960s. The advent of liposuction has reduced the need for classic abdominoplasty and allowed more aesthetic sculpting of the entire trunk. However, the combination of significant truncal liposuction and classic abdominoplasty is not recommended due to the increased risk of complications. Although the surgical principles of classic abdominoplasty certainly have stood the test of time, they are based on two theoretical assumptions that may be proved to be inaccurate. The first assumption is that wide direct undermining to costal margins is essential for abdominal flap advancement. In fact, discontinuous undermining allows effective loosening of the abdominal flap while preserving vascular perforators. The second inaccurate assumption is that with aging and weight fluctuations (including pregnancy), abdominal skin relaxation occurs primarily in the vertical direction from the xiphoid to the pubis. This is true in the lower abdomen, but in most patients a strong superficial fascial system adherence to the linea alba in the epigastrium limits vertical descent. Epigastric laxity frequently results from a progressive horizontal loosening due to relaxation of the tissue along the lateral trunk. Experience with the lower-body lift procedure has shown that significant lateral truncal skin resection results in epigastric tightening. In these patients, the ideal abdominoplasty pattern would resect as much or more laterally than centrally, leading to more natural abdominal contours. Fifty patients who underwent high-lateral-tension abdominoplasty with and without significant truncal liposuction and other aesthetic procedures were followed for 4 to 16 months. The primary indication for surgery was moderate to severe laxity of abdominal skin and muscle with or without truncal fat deposits. Complication rates were equal to or less than those of historical controls and did not increase with significant adjunctive liposuction

  15. Emergence of Anomalous Transport in Stressed Rough Fractures

    Science.gov (United States)

    Kang, P. K.; Brown, S.; Alves da Silva, J.; Juanes, R.

    2015-12-01

    Fluid flow and tracer transport in fractured rock controls many natural and engineered processes in the geosciences, and therefore has been extensively studied. Geologic fractures, however, are always under significant overburden stress. While confining stress has been shown to impact fluid flow through rough-walled fractures in a fundamental way, studies of anomalous tracer transport at the scale of individual fractures have so far ignored the potential role of confining stress.Here, we report the emergence of anomalous (non-Fickian) transport through a rough-walled fracture as a result of increasing the normal stress on the fracture. We generate fracture surfaces with fractal roughness, and solve the elastic contact problem between the two surfaces to obtain the 3D fracture geometry for increasing levels of normal stress. We then simulate fluid flow and particle transport through the stressed rough fracture. We observe a transition from Fickian to anomalous transport as the normal stress on the fracture increases.We show that the origin of this anomalous transport behavior can be traced to the self-organization of the flow field into a heterogeneous structure dominated by preferential channels and stagnation zones, as a result of the larger number of contacts in a highly stressed fracture. We also propose a spatial Markov model that reproduces the transport behavior at the scale of the entire fracture with only three physical parameters. Our results point to a heretofore unrecognized link between geomechanics and anomalous particle transport in fractured media. Finally, we show preliminary laboratory experiment results that confirm our findings. (a) Magnitude of the volumetric flux at each discretization grid block at low stress. (b) Magnitude of the volumetric flux for a highly stressed fracture. Values are normalized with the mean volumetric flux.

  16. ANOMALOUS ORIGIN OF THE LEFT VERTEBRAL ARTERY. Origen anómalo de la arteria vertebral izquierda

    Directory of Open Access Journals (Sweden)

    Divya Premchandran

    2016-03-01

    Full Text Available Las variaciones de los principales vasos arteriales son de importancia clínica. La arteria vertebral (VA normalmente surge de la arteria subclavia. El presente informe describe un origen anómalo de la arteria vertebral izquierda (LVA desde el arco aórtico entre el origen de la subclavia izquierda y la arteria carótida común izquierda. Esta arteria cruzó superficialmente de medial a lateral el tronco simpático izquierdo. La VA izquierda y derecha entraban en los agujeros transversos de la quinta vértebra cervical. Aunque el origen anómalo de la VA es bien conocida, su origen y la entrada a través del foramen transversal y sus relaciones con tronco simpático son de importancia clínica y durante los procedimientos vasculares en la región de cabeza y cuello tales como los stent de arteria carótida o vertebral y las intervenciones intracraneales. Variations of major arterial vessels are of clinical significance. The vertebral artery (VA normally arises from the subclavian artery. The present report describes an anomalous origin of the left vertebral artery (LVA from the aortic arch between the origin of the left subclavian and the left common carotid arteries. This artery was crossed superficially from medial to lateral by the left sympathetic trunk. The left and right VA entered the foramen on the transverse process of the fifth cervical vertebra. Though the anomalous origin of the VA is known, its origin and entry through the transverse foramen and its relations with sympathetic trunk are of importance during clinical and vascular procedures in the head and neck region like carotid artery stents, VA stents and intracranial interventions.

  17. The Measurement of the Muon's Anomalous Magnetic Moment Isn't

    CERN Document Server

    Feng, J L; Shadmi, Y; Feng, Jonathan L; Matchev, Konstantin T.; Shadmi, Yael

    2003-01-01

    Recently the Muon (g-2) Collaboration announced a new measurement of the muon's anomalous magnetic moment [hep-ex/0208001]. More precisely, however, what has been measured is the muon's anomalous spin precession frequency. We point out that this receives contributions from both the muon's anomalous magnetic and electric dipole moments, and the reported data and all existing constraints cannot distinguish between the two.

  18. Internet: Más Allá de la superficie

    Directory of Open Access Journals (Sweden)

    Diego Andrés Tovar Cardozo

    2015-01-01

    Full Text Available El presente artículo expone un enfoque técnico de la Internet que da a conocer algunas características de su estructura, la cual muestra dos sectores distintos en donde se puede encontrar la información, es decir, esta se encuentra distribuida en niveles o capas de manera parcial o restringida, integrada o desagregada, todo ello dependiendo de lo que el usuario requiera realmente. La forma correcta para acceder a la información requerida está en saber a dónde ir a buscarla, la web profunda es información no visible para el usuario común que no tiene la habilidad de búsqueda, por lo cual se hace necesario verificar el tipo, la calidad y veracidad de la información a obtener antes de proceder a usar la información encontrada con los buscadores tradicionales. Acceder a Internet sin saber que existe una falsa cortina utilizada por la mayoría de los buscadores convencionales, es limitar las capacidades de navegar en un océano de información valiosa, en ello radica la importancia de conocer la web desde lo superficial (Surface Web a lo profundo (Deep Web.

  19. Temperatura superficial de materiais utilizados para cobertura individual de bezerreiros

    Directory of Open Access Journals (Sweden)

    Janice M. C. Barnabé

    2014-05-01

    Full Text Available Propôs-se, com este trabalho avaliar, por meio de imagens térmicas, a temperatura superficial das coberturas de abrigos individuais para bezerras na fase de aleitamento. O período experimental foi de janeiro a março de 2012, com duração de 56 dias, conduzido com 24 abrigos individuais para bezerras Girolando. Os tratamentos consistiram em três tipos de cobertura: palha de palmeira, telha de polímero reciclado e telha de cimento amianto. O delineamento experimental adotado foi o inteiramente casualizado efetuando-se a comparação entre as médias pelo teste de Tukey (P < 0,05. Os resultados mostraram diferença significativa entre os tratamentos estudados e as telhas recicladas apresentaram menores valores de temperatura média na superfície superior, em todos os horários analisados sendo o valor máximo encontrado da ordem de 36,9 ºC e o mínimo de 14,4 ºC. Os abrigos cobertos por palha e com telhas recicladas mostraram melhor desempenho térmico em relação à cobertura de fibrocimento, provavelmente indicando melhor condição de conforto térmico aos animais alojados.

  20. DRENAGEM SUPERFICIAL DE SOLOS ARGILOSOS DO NORTE DO PARANÁ

    Directory of Open Access Journals (Sweden)

    Rogério Teixeira de Faria

    1999-08-01

    Full Text Available RESUMO Foi avaliado o desempenho de práticas de drenagem superficial e cobertura morta em uma área de várzea do norte do Paraná. Antes e após o cultivo do arroz, foram comparadas as taxas de drenagem em tratamentos com e sem drenos torpedo e determinadas a vazão e a obstrução dos condutos. Sob o cultivo do feijoeiro, foram avaliados os efeitos dos drenos torpedo e de "camas" na drenagem e de cobertura morta (palha de arroz na retenção de água do solo. Os resultados indicaram que os drenos torpedo foram mais eficientes se construídos com solo menos úmido, porém sua longevidade foi menor que um ano. Sob o feijoeiro, os drenos torpedo e cobertura morta mantiveram o lençol freático mais profundo e o solo com menor tensão de umidade, mas esses efeitos ocorreram abaixo da zona radicular (15 cm, resultando em baixa produtividade.

  1. The analysis of special superficial collimators in HDR equipment

    International Nuclear Information System (INIS)

    Chierego, G.; Compri, C.; Meliado, G.; Rizzotti, A.

    1995-01-01

    The Brachytherapy HDR (Gammamed 12 i) available at our department, is provided with a variety of accessories (special collimators) that allow an Ir-192 source to be used for the external irradiation of superficial volumes. These collimators made of tungsten, cone shaped and of different sizes; the Ir-192 source is located on their top. The goal of this paper is to establish the isodose distributions for these applicators, as far as it is carried out for the external beams in teletherapy. To define the percentage depth dose a water phantom (Therados RFA 7) was used by means of diode detectors up 82 mm of depth. Each beam was scanned by a series of measurements by steps of 10 mm to define the x and y profiles. The percentage depth dose as compared with those obtained by small ionization chambers. The values, analyzed by the two different detectors (diode and ionization chamber) matched almost completely. Both the series of difference curves normalized at a depth of 2 cm, give the difference less than 1%

  2. Inmersiones condicionadas de grafos en superficies y seudosuperficies.

    Directory of Open Access Journals (Sweden)

    Fedriani Martel, E. M.

    1999-01-01

    Full Text Available En este trabajo se procede a recapitular resultados conocidos sobre el problema de caracterizar los grafos que admiten inmersiones en superficies y en seudosuperficies con todos los vértices en la misma cara y se da una caracterización original de los grafos con dicha propiedad en seudosuperficies que surgen de manera natural y que han sido tratadas en la literatura especializada. Se comienza desarrollando algunos conceptos necesarios para la exposición de los problemas que se tratan, pero se suponen conocidos otros básicos de la Teoría de Grafos. Los resultados relacionados llevan de forma consecuente al planteamiento de otros problemas cuyas resoluciones originales también se incluyen. En cuanto a los objetivos finales que se pretenden lograr con esta comunicación, se basan, sobre todo, en aprovechar los resultados obtenidos por la Teoría de Grafos para resolver problemas pertenecientes a otras áreas, como la Economía. Se termina exponiendo un motivo topológico por el que estos estudios sobre las inmersiones y las inmersiones peri-S se hallan próximas a la Economía.

  3. Superficial chemical peeling with salicylic acid in facial dermatoses

    International Nuclear Information System (INIS)

    Bari, A.U.; Iqbal, Z.; Rahman, S.B.

    2007-01-01

    To determine the effectiveness of salicylic acid chemical peeling in common dermatological conditions affecting face in people with predominant Fitzpatrick skin type IV and V. A total of 167 patients of either gender, aged between 13 to 60 years, having some facial dermatoses (melasma, acne vulgaris, postinflammatory hyperpigmentations, freckles, fine lines and wrinkles, post-inflammatory scars, actinic keratoses, and plane facial warts) were included. A series of eight weekly hospital based peeling sessions was conducted in all patients under standardized conditions with 30% salicylic acid. Clinical improvement in different disorders was evaluated by change in MASI score, decrease in the size of affected area and % reduction in lesions count. McNemar test was applied for data analysis. Majority of the patients showed moderate to excellent response. There was 35% to 63% improvement (p< 0.05) in all dermatoses. Significant side effects, as feared in Asian skins were not observed. Chemical peeling with salicylic acid is an effective and safe treatment modality in many superficial facial dermatoses. (author)

  4. Superficial effects during the activation of zirconium AB2 alloys

    International Nuclear Information System (INIS)

    Zerbino, J; Visitin, A; Triaca, W

    2005-01-01

    The activation of zirconium nickel alloys with and without the addition of chromium and titanium is investigated through electrochemical and optical techniques.These alloys show high hydrogen absorption capacity and are extensively used in metal hydride batteries.Recent investigations in aqueous 1 M KOH indicate oxide layer growth and occlusion of hydrogen species in the alloys during the application of different cathodic potential programmes currently used in the activation process.In this research several techniques such as voltammetry, ellipsometry, energy dispersive analysis of X-rays EDAX, and scanning electron microscopy SEM are applied on the polished massive alloy Zr 1 -xTi x , x=0.36 y 0.43, and Zr 1 -xTi x CrNi, x=0.1,0.2 y 0.4.Data analysis shows that the stability, compactness and structure of the passive layers are strongly dependent on the applied potential programme.The alloy activation depends on the formation of deepen crevices that remain after a new polishing. Microscopic observation shows increase in the crevices thickness after the cathodic sweep potential cycling, which produces fragmentation of the grains and oxide growth during the activation process.This indicates metal breaking and intergranular dissolution that take place together with oxide and hydride formation.In some cases the resultant crevice thickness is one or two orders higher than that of the superficial oxide growth indicating intergranular localised corrosion

  5. The superficial venous system of the lower extremity: new nomenclature.

    Science.gov (United States)

    Kachlik, D; Pechacek, V; Baca, V; Musil, V

    2010-06-01

    The phlebology in the area of lower limbs is the only medical field in which the terminological needs of clinicians were met. Ten years ago, the latest revision of the Latin anatomical nomenclature, Terminologia Anatomica (TA), was issued. But almost none of the chapters reflected the clinicians' need to be a relevant theoretical base for correct diagnostics and appropriate treatment. In 2001, during the 14th World Congress of the International Union of Phlebology, a consensus document (under the auspices of Federative International Committee on Anatomical Terminology and International Federation of Associations of Anatomists) was laid to expand the nomenclature of the lower extremity venous system. Some terms have been changed and several new have been added, corresponding to their clinical significance and anatomical positions. Sixteen new terms have been added in both Latin and English languages in the chapter concerning the superficial veins of the lower limb. This consensus document will be incorporated into the next version of the TA. The international anatomical nomenclature serves as a communication base for research, diagnostic, therapy and information exchange in phlebological sciences.

  6. Superficial fine needle aspiration by clinicians: a survey of utilization.

    Science.gov (United States)

    Fitzpatrick, B T; Bibbo, M

    1996-09-01

    Quality assurance is as much concerned with cost, turnaround time, and use of resources as with test reliability and outcome. The cytopathologist needs to be aware of the knowledge base and expectations of clinicians who perform fine needle aspiration (FNA) biopsies of superficial lesions without technical assistance. To this end, a single correct answer multiple choice questionnaire was sent to 82 procedure-oriented clinical faculty members. Completed answer sheets from 35 faculty members were analyzed. The score for fee and turnaround time was 63.2 per cent and for knowledge of technique 70.6 per cent. The overall score for use of FNA was 64.7 per cent and for specimen handling was 45.6 per cent. Of those 65 per cent of participants who made comments, 30 per cent stressed importance of shorter turnaround time and 27 per cent emphasized the need for training in this area of endeavor. It is concluded that the quality of diagnosis can be improved by placing greater emphasis on training and education, the provision of written material, courses or tutorials in technique, written and verbal feedback regarding specimen adequacy, and by making more extensive use of electronic transmission of results.

  7. Seasonal variation in the superficial vein thrombosis frequency.

    Science.gov (United States)

    Frappé, Paul; Bertoletti, Laurent; Presles, Emilie; Buchmuller-Cordier, Andréa; Merah, Adel; Le Hello, Claire; Peycelon, Déborah; Tardy, Bernard; Décousus, Hervé

    2015-12-01

    A seasonal variation of venous thromboembolic disease frequency is subject to discussion, and has been recently suggested for superficial vein thrombosis (SVT) in a small retrospective study. Our aim was to search for a seasonal variation of SVT frequency according to the data of larger studies. We analyzed the data of three French prospective multicenter studies with different designs which have included patients with SVT (STENOX, POST, and STEPH studies). Seasonal variation of SVT frequency was evaluated by comparing the observed seasonal frequency of SVT to a theoretical frequency of 25% for each season. The analysis included 1395 patients and 4.75 seasonal cycles. The difference to a theoretical frequency of 25% was statistically significant in one study (POST, p = 0.044). The higher risk difference was -6.1% (95% CI -11.7–−0.5) in summer in STENOX, +7.1% (95% CI +2.7-+11.5) in winter in POST and 4.2% (95% CI -5.2-+13.7) in spring in STEPH, corresponding to a relative risk of 0.80, 1.40 and 1.20, respectively. A seasonal variation was found in only one study which has the weakest methodology to warrant completeness. Variation pattern was

  8. Recurrence of superficial vein thrombosis in patients with varicose veins.

    Science.gov (United States)

    Karathanos, Christos; Spanos, Konstantinos; Saleptsis, Vassileios; Tsezou, Aspasia; Kyriakou, Despina; Giannoukas, Athanasios D

    2016-08-01

    To investigate which factors other than history of superficial vein thrombosis (SVT) are associated with recurrent spontaneous SVT episodes in patients with varicose veins (VVs). Patients with a history of spontaneous SVT and VVs were followed up for a mean period of 55 months. Demographics, comorbidities, and thrombophilia screening test were analyzed. Patients were grouped according to the clinical-etiology-anatomy-pathophysiology classification. A multiple logistic regression analysis with the forward likelihood ratio method was undertaken. Thirteen patients out of 97 had a recurrence SVT episode during the follow-up period. All those patients were identified to have a thrombophilia defect. Protein C and S, antithrombin, and plasminogen deficiencies were more frequently present in patients without recurrence. Gene mutations were present in 38% in the nonrecurrence group and 77% in the recurrence group. After logistic regression analysis, patients with dislipidemia and mutation in prothrombin G20210A (FII) had an increased risk for recurrence by 5.4-fold and 4.6-fold, respectively. No deep vein thrombosis or pulmonary embolism occurred. Dislipidemia and gene mutations of F II are associated with SVT recurrence in patients with VVs. A selection of patients may benefit from anticoagulation in the short term and from VVs intervention in the long term. © The Author(s) 2015.

  9. Fine-needle aspiration cytology in children with superficial lymphadenopathy

    Directory of Open Access Journals (Sweden)

    F. De Corti

    2014-04-01

    Full Text Available Introduction: In pediatric population Fine-Needle Aspiration Citology (FNAC is slowly gaining acceptance in clinical management of Superficial Lymphadenopathy (SL. Our experience adds some data about the usefulness of this technique in diagnosing the cause of a SL and therefore guiding further treatment. Patients and Methods: 238 FNAC were performed in 217 patients with SL, observed at our Institution from 2002 to 2006. The neck was the most frequent localization. The results were available within few hours. In cases of granulomatous findings, the samples were processed for microbiological and PCR test, in order to identify Mycobacteria. Results: 174 were reactive lesions, 38 granulomatous lymphadenopathies, 24 malignant lesions, 2 specimens inadequate for diagnosis. Among the 174 reactive SL, 22 required an incisional biopsy after 1 month follow-up. Among the granulomatous lymphadenopathies, 13 children with Cat-Scratch Disease recovered, 25 with Mycobacteria infection underwent surgical excision. For 24 malignant lesions, the diagnosis was confirmed by further biopsy. Two false negative and no false positive were detected (sensitivity 92%, specificity 100%. No complications were encountered. Conclusions: In our experience FNAC, performed by experienced cytopathologist, has revealed to be a fast, safe, non invasive and inexpensive method to achieve diagnosis in persistent SL. The use of FNAC gave us the possibility to select patients for further investigation and/or surgical treatment. Incisional biopsy remains necessary to confirm the diagnosis in case of malignancy or doubtful lesions.

  10. Spinal meningeal melanocytoma and hydrocephalus and intracranial superficial siderosis

    International Nuclear Information System (INIS)

    Das, A.; Ratnagopal, P.; Puvanendran, K.; Teo, J.G.C.

    2001-01-01

    Meningeal melanocytomas are uncommon tumours of the central nervous system; fewer than 50 cases have been reported in the English literature. We review the unique clinical presentation, radiological appearance and histological features of a rare case of meningeal melanocytoma. The patient was a 50-year-old man with a history of hypertension who presented with complaints of severe headache, nausea, vomiting and blurry vision for 2 days. Clinical examination revealed no hyperpigmentation marks and he had no history of regressed skin melanocytic lesions. Apart from mild terminal neck stiffness, his general medical examination was unremarkable. On funduscopic examination he had marked bilateral papilloedema and the blind spots were enlarged bilaterally. His neurological examination was otherwise unremarkable. A magnetic resonance imaging scan (MRI) of the brain showed hydrocephalus. On the precontrast T 2 -weighted images, there was hyperintensity of the meninges with little change after administration of gadolinium, which was suggestive of blood. On the T 2 -weighted sequences, there was evidence of hypo-i intensity on the surface of the pons and medulla, which was indicative of superficial siderosis

  11. First case of superficial infection due to Naganishia albida (formerly Cryptococcus albidus in Iran: A review of the literature

    Directory of Open Access Journals (Sweden)

    Sanaz Aghaei Gharehbolagh

    2017-06-01

    Conclusion: N. albida can be the causative agent of some superficial infections. This is the first report on the successful detection and treatment of a superficial skin infection due to N. albida by oral itraconazole.  

  12. The specificationof nano-structure superficial layers in some of the pathogen bacteria

    Directory of Open Access Journals (Sweden)

    Shilla Jalalpoor

    2010-11-01

    Full Text Available Background: The superficial layer is a part of the cellular envelop that is seen in bacteria and archaea. This superficial layer is a single layer structure composed of subordinate proteins or glycoproteins. The superficial layer is the outer most cellular structure that is in the exchange and reaction around environment with bacteria. This structure has very diversity in bacteria different types.Materials and Method: The related articles to superficial layer were extracted of these articles: Pubmed, Elsevier Science, and Yahoo, from 1995 to 2010 years. For this purpose keywords were searched including superficial layer, pathogenesis, pathogen bacteria,Results: There is consensus in the case of the superficial layer and about the existence of this superficial structure lead to increased pathogenesis in bacteria, in all of the research articles.Conclusion: S-layers in pathogen bacteria with bacteria protection against bacteriophages and phagocytosis, resistance against low pH, adhesion, stabilisation of the membrane and providing adhesion sites for exoproteins caused pathogenesis, infection resistant and antibiotic resistant in host.The result of this study shows the prevalence of considerable S-layer in pathogen bacteria and this matter identified the bacteria generator importance of this structure in the laboratory

  13. Superficial or cutaneous malignant peripheral nerve sheath tumor--clinical experience at Taipei Veterans General Hospital.

    Science.gov (United States)

    Feng, Chin-Jung; Ma, Hsu; Liao, Wen-Chieh

    2015-05-01

    Primary malignant peripheral nerve sheath tumors (MPNSTs) with a cutaneous or subcutaneous origin represent a small subset of MPNSTs thought to be derived from cutaneous neurofibromas or small peripheral nerves. Few cases of superficial MPNSTs originating from the skin have been reported in the literature. From October 1999 to February 2014, 13 patients were diagnosed with superficial or cutaneous MPNSTs and received treatment at Taipei Veterans General Hospital. Clinical data were collected via retrospective chart review. A retrospective study was performed to compare superficial and deep-seated lesions in terms of local recurrence, distal metastasis, and survival analysis. The relevant literature is also briefly reviewed. The most frequent initial symptoms were local swelling and pain. Ten tumors were found in the extremities, and 3 tumors were located on the trunk. All patients underwent surgery with curative intent. Four patients developed local recurrence, and 3 developed distant metastasis. Three of 13 patients died after a follow-up period of 11 to 180 months (mean, 53.4). Compared to deep-seated MPNSTs, superficial MPNSTs had a lower histopathological grading and better survival rate. Superficial MPNSTs are a rare variant of MPNST. The relatively frequent lack of associated neurofibromatosis and superficial location within the dermis and subcutis may result in this entity being overlooked. According to our clinical experience, superficial MPNSTs might have better prognosis, but similar recurrence and metastasis rates compared with deep-seated lesions. Hence, awareness of this entity should prompt its consideration in the differential diagnosis of cutaneous sarcomas.

  14. Superficial vein thrombosis and deep vein thrombosis – a comparison

    Directory of Open Access Journals (Sweden)

    Zbigniew Krasiński

    2017-09-01

    Full Text Available Although superficial vein thrombosis is commonly considered a rather minor condition, a number of studies indicate that its consequences can be much more severe. Since the introduction of Doppler ultrasonography to common diagnosis of venous diseases, the approach to threats associated with superficial vein thrombosis has changed, mainly in the context of venous thromboembolism. Superficial thrombosis in varicose veins must be differentiated from that occurring in patients without varicosities. In the former case, superficial vein thrombosis is usually caused by haemodynamic disorders (slower flow, while in the latter, it is caused by thrombophilia or inflammation, but it can also be a prodromal sign of cancer. Ultrasonography enables one to distinguish deep vein thrombosis caused by superficial vein thrombosis progression (by extension through perforator veins or the great/small saphenous vein ostium into the deep venous system from deep vein thrombosis occurring at a certain distance from the site of superficial vein thrombosis. The authors emphasise that due to the possibility of concomitant deep vein thrombosis or pulmonary embolism, our attitude to the diagnostic process, potential complications and treatment of superficial vein thrombosis should be changed.

  15. Representations of Peronism as totalitarianism in the view of the Socialist Party during a Cold War period in Argentina (1950-1955

    Directory of Open Access Journals (Sweden)

    Artinian, Juan Pablo

    2015-06-01

    Full Text Available This article analyzes forms of cultural production that opposed Peronism in Argentina between 1950 and 1955 in the context of the Cold War. It focuses on representations created by Argentina’s Socialist Party. This party created a series of discourses opposed to Peronism using local and transnational categories that were framed by the country’s own view of the Cold War. The Socialist Party used these discourses to stigmatize Perón’s Argentina as a species of totalitarian state. This article sought to go beyond the traditional perspectives of Cold War historiography, whose focus is on diplomatic and military history and the bulk of whose analysis is devoted to dissecting the United States’ attempts to establish hegemony over Latin America or to describing the phenomenon of justicialismo’s “third position.” This article, on the other hand, sought to use cultural analysis to explore Latin America’s own agency in its adoption of language pertaining to the early Cold War period. Socialists crafted a stylized, and sometimes exaggerated, discourse in which imagery belonging to fascism and, to a lesser extent, Stalinism after the rise of the Iron Curtain, was combined with the local figure of nineteenth century governor Juan Manuel de Rosas.Este artículo analiza formas culturales que se opusieron al Peronismo en Argentina entre 1950 y 1955 en el contexto de la Guerra Fría. El artículo se focaliza en las representaciones creadas por el Partido Socialista Argentino. Este partido creó una serie de discursos opuestos al peronismo a través de categorías e ideas trasnacionales y locales enmarcadas en nociones propias de la Guerra Fría. Así el Partido Socialista estigmatizó al peronismo como una forma de estado totalitario. Este artículo busca ir más allá de las visiones tradicionales de la historiografía sobre la Guerra Fría basadas en la historia diplomática o militar donde gran parte del análisis daba cuenta de los intentos

  16. Microcirculation in the foot is augmented by neuromuscular stimulation via the common peroneal nerve in different lower limb postures: a potential treatment for leg ulcers.

    Science.gov (United States)

    Warwick, D; Shaikh, A; Worsley, P; Gadola, S; Bain, D; Tucker, A; Gadola, S D; Stokes, M

    2015-04-01

    Aim of the study was to examine the effects of the geko™ device (a portable electical nerve stimulator) on microcirculatory flow on the dorsum of the foot, and whether this is influenced by lower limb postures and application of a plaster cast. This was a cross-sectional, healthy cohort, open label, physiological response study. In 10 healthy volunteers, aged 19 to 24 years, laser Doppler fluxmetry measurements were made on the dorsum of the foot in four postures: standing (weight bearing and non-weight bearing) and supine lying (with the lower limb horizontal and then elevated). Measurements of flux were made both at rest and during stimulation with the geko™ device applied over the common peroneal nerve, at 1 Hz for 5 minutes in each posture. Repeat measurement were made after the application of a below knee plaster cast. Measures of flux were compared to basal levels assumed to be in supine with limb horizontal, with no cast and an inactive geko™ device. The geko™ device was effective in increasing microcirculation on the dorsum of the foot in all four postures (mean difference =141%, 95% CI 70%-212%, P=0.001). This effect was more pronounced than that of using a plaster alone (Mean increase in flux of 73%, 95% CI 22%-125%, P=0.01) or variances due to the hydrostatic effects of different postures (mean difference 17-27.6%, P>0.05). There was a 2 to 3 fold increase in flux when stimulation was delivered in combination with the plaster cast. Stimulation using the geko™ device augments microcirculation in the foot. The response is greater in lying and non-weight bearing than weight bearing standing but the most striking effect is when stimulation is combined with a plaster cast. The geko™ offers a potential means of promoting conditions favourable for wound healing, where treatment using compression may be contraindicated, such as arterial/mixed aetiology ulcers.

  17. Designaciones y organización partidaria: el partido de redes gubernamentales en el peronismo kirchnerista Appointments and party organizations: network governmental party in kirchnerista peronism

    Directory of Open Access Journals (Sweden)

    Gerardo SCHERLIS

    2013-02-01

    Full Text Available Este artículo contribuye a comprender la estructura organizativa del peronismo, la fuerza política dominante en Argentina, a partir de la observación de las designaciones partidarias en el Estado. Para ello el trabajo presenta los resultados de una investigación sobre el alcance, los mecanismos, las motivaciones y los criterios de las designaciones partidarias en el Estado federal argentino, con particular énfasis en lo ocurrido durante la presidencia de Néstor Kirchner (2003- 2007. El argumento más general sostiene que las designaciones han devenido en este período en una herramienta esencial para lograr un control efectivo sobre el aparato estatal mientras que sirven, simultáneamente, para reconfigurar las élites partidarias del peronismo bajo el liderazgo del presidente. Los datos, surgidos de una amplia serie de entrevistas a expertos, permiten finalmente ofrecer un nuevo marco teórico para estudiar el vínculo entre partido y gobierno en el contexto de la democracia argentina contemporánea.This article contributes to the understanding of the organizational structures of peronism, Argentine dominant political force, on the basis of a study on partisan appointments. It presents the main findings of a research on the scope, the workings, the motivations, and the criteria of partisan appointments in the Argentine state, with particular attention to Néstor Kirchner administration (2003-2007. The more general argument contends that appointments became in this period a crucial tool to control the state apparatus while, at the same time, they made it possible to renovate Peronist partisan elites under the leadership of the president. The data, obtained from a large series of expert interviews, make it possible to offer a new theoretical framework for the understanding of party-government linkages in contemporary Argentine democracy.

  18. Neuromuscular electrical stimulation via the peroneal nerve is superior to graduated compression socks in reducing perceived muscle soreness following intense intermittent endurance exercise.

    Science.gov (United States)

    Ferguson, Richard A; Dodd, Matthew J; Paley, Victoria R

    2014-10-01

    A novel technique of neuromuscular electrical stimulation (NMES) via the peroneal nerve has been shown to augment limb blood flow which could enhance recovery following exercise. The present study examined the effects of NMES, compared to graduated compression socks on muscle soreness, strength, and markers of muscle damage and inflammation following intense intermittent exercise. Twenty-one (age 21 ± 1 years, height 179 ± 7 cm, body mass 76 ± 9 kg,) healthy males performed a 90-min intermittent shuttle running test on three occasions. Following exercise, the following interventions were applied: passive recovery (CON), graduated compression socks (GCS) or NMES. Perceived muscle soreness (PMS) and muscle strength (isometric maximal voluntary contraction of knee extensors and flexors) were measured and a venous blood sample taken pre-exercise and 0, 1, 24, 48 and 72 h following exercise for measurement of creatine kinase (CK) and Lactate dehydrogenase (LDH) activity and IL-6 and CRP concentrations. PMS increased in all conditions immediately, 1 and 24 h post-exercise. At 24 h PMS was lower in NMES compared to GCS and CON (2.0 ± 1.6, 3.2 ± 2.1, 4.6 ± 2.0, respectively). At 48 h PMS was lower in NMES compared to CON (1.3 ± 1.5 and 3.1 ± 1.8, respectively). There were no differences between treatments for muscle strength, CK and LDH activity, IL-6 and CRP concentrations. The novel NMES technique is superior to GCS in reducing PMS following intense intermittent endurance exercise.

  19. Comportamiento a fatiga del acero sae 4140 usando alta rugosidad superficial y ambiente corrosivo

    OpenAIRE

    CEBALLOS, WILSON FERNANDO; GÓMEZ, ADOLFO LEÓN; CORONADO, JOHN JAIRO

    2010-01-01

    En este artículo se presenta el estudio del comportamiento a fatiga del acero SAE 4140 en condiciones diferentes: superficie pulida (acabado espejo), ambiente corrosivo (jugo de caña de azúcar), alta rugosidad superficial (superficie equivalente a la encontrada típicamente en los ejes de molino de caña) y una condición que involucra la combinación de las dos últimas. Las anteriores condiciones están presentes en los ejes de maza de molino de caña de azúcar durante el proceso de molienda. Se r...

  20. Unexpected diagnosis of superficial neurofibroma in a lesion with imaging features of a vascular malformation

    Energy Technology Data Exchange (ETDEWEB)

    O' Keefe, Patrick; Reid, Janet; Morrison, Stuart [Cleveland Clinic Foundation, Department of Radiology, Cleveland, OH (United States); Vidimos, Allison [Cleveland Clinic Foundation, Department of Dermatology, Cleveland, OH (United States); DiFiore, John [Cleveland Clinic Foundation, Department of Pediatric Surgery, Cleveland, OH (United States)

    2005-12-01

    Plexiform neurofibroma is a pathognomonic, often disabling feature of neurofibromatosis type I. Although the target-like appearance of deep plexiform neurofibroma on T2-weighted MRI has been well-described, a second superficial form of plexiform neurofibroma has differing imaging features. We report a 15-year-old boy who presented with multiple cutaneous lesions exhibiting clinical and imaging characteristics of a venolymphatic malformation. These lesions were histologically proved to represent superficial plexiform neurofibromas. We wish to emphasize the unique MR findings of superficial plexiform neurofibromas; these findings are different from the imaging characteristics of the deep form and can be confused with a low-flow vascular malformation. (orig.)

  1. Relationship between the anomalous diffusion and the fractal dimension of the environment

    Science.gov (United States)

    Zhokh, Alexey; Trypolskyi, Andrey; Strizhak, Peter

    2018-03-01

    In this letter, we provide an experimental study highlighting a relation between the anomalous diffusion and the fractal dimension of the environment using the methanol anomalous transport through the porous solid pellets with various pores geometries and different chemical compositions. The anomalous diffusion exponent was derived from the non-integer order of the time-fractional diffusion equation that describes the methanol anomalous transport through the solid media. The surface fractal dimension was estimated from the nitrogen adsorption isotherms using the Frenkel-Halsey-Hill method. Our study shows that decreasing the fractal dimension leads to increasing the anomalous diffusion exponent, whereas the anomalous diffusion constant is independent on the fractal dimension. We show that the obtained results are in a good agreement with the anomalous diffusion model on a fractal mesh.

  2. Analyses of superficial and depth doses in intraoral radiology

    Energy Technology Data Exchange (ETDEWEB)

    Silva Santos de Oliveira, C.; Morais, R.P. de; Nascimento Souza, D. do [Universidade Federal de Sergipe - CCET - Dept. de Fisica, Sao Cristovao, SE (Brazil)

    2006-07-01

    In this work dosimetric analysis using thermoluminescence technique to study the beams characteristics of x-rays employed in dental radiology has been carried out. The obtained results with CaSO{sub 4}:Dy thermoluminescent dosimeters (TLD) were compared to the doses obtained with parallel-plates ionization chamber. Dosimetric evaluations were also done using radiographic films of large dimensions. The x-rays equipments analyzed were installed in the radiological services of Odontology Department of Sergipe Federal University (U.F.S.). Depending on the anatomical region to be examined the proper exposure time was select, for a fix voltage of 70 kV. The results with TLD and ionization chamber have been determined to female and male individuals. The intraoral regions analysed were the peri apical of the incisors, molar and pre-molar teeth and the occlusive region. These regions were simulated using acrylic plates absorbers installed on the film packet holder. The evaluation of the depth doses in the intraoral tissue was obtained using different acrylic plate thickness. The air kerma values have been evaluated with the ionization chamber located in the dental cone exit of the x-rays equipments. The integrated areas of the thermoluminescent glow curves showed coherent values when compared to the ones obtained with the ionization chamber and both methods presented a linear dependence with the exposition time. The analyses with films have allowed the evaluation of the beam scattering in the simulator apparatus. The studies had proven that the analysis of superficial dose and in depth used in dental radiology can be carried with thermoluminescent dosimeters. (authors)

  3. Analyses of superficial and depth doses in intraoral radiology

    International Nuclear Information System (INIS)

    Silva Santos de Oliveira, C.; Morais, R.P. de; Nascimento Souza, D. do

    2006-01-01

    In this work dosimetric analysis using thermoluminescence technique to study the beams characteristics of x-rays employed in dental radiology has been carried out. The obtained results with CaSO 4 :Dy thermoluminescent dosimeters (TLD) were compared to the doses obtained with parallel-plates ionization chamber. Dosimetric evaluations were also done using radiographic films of large dimensions. The x-rays equipments analyzed were installed in the radiological services of Odontology Department of Sergipe Federal University (U.F.S.). Depending on the anatomical region to be examined the proper exposure time was select, for a fix voltage of 70 kV. The results with TLD and ionization chamber have been determined to female and male individuals. The intraoral regions analysed were the peri apical of the incisors, molar and pre-molar teeth and the occlusive region. These regions were simulated using acrylic plates absorbers installed on the film packet holder. The evaluation of the depth doses in the intraoral tissue was obtained using different acrylic plate thickness. The air kerma values have been evaluated with the ionization chamber located in the dental cone exit of the x-rays equipments. The integrated areas of the thermoluminescent glow curves showed coherent values when compared to the ones obtained with the ionization chamber and both methods presented a linear dependence with the exposition time. The analyses with films have allowed the evaluation of the beam scattering in the simulator apparatus. The studies had proven that the analysis of superficial dose and in depth used in dental radiology can be carried with thermoluminescent dosimeters. (authors)

  4. Ghost anomalous dimension in asymptotically safe quantum gravity

    International Nuclear Information System (INIS)

    Eichhorn, Astrid; Gies, Holger

    2010-01-01

    We compute the ghost anomalous dimension within the asymptotic-safety scenario for quantum gravity. For a class of covariant gauge fixings and using a functional renormalization group scheme, the anomalous dimension η c is negative, implying an improved UV behavior of ghost fluctuations. At the non-Gaussian UV fixed point, we observe a maximum value of η c ≅-0.78 for the Landau-deWitt gauge within the given scheme and truncation. Most importantly, the backreaction of the ghost flow onto the Einstein-Hilbert sector preserves the non-Gaussian fixed point with only mild modifications of the fixed-point values for the gravitational coupling and cosmological constant and the associated critical exponents; also their gauge dependence is slightly reduced. Our results provide further evidence for the asymptotic-safety scenario of quantum gravity.

  5. Anomalous axion interactions and topological currents in dense matter

    International Nuclear Information System (INIS)

    Metlitski, Max A.; Zhitnitsky, Ariel R.

    2005-01-01

    Recently an effective Lagrangian for the interactions of photons, Nambu-Goldstone bosons and superfluid phonons in dense quark matter has been derived using anomaly matching arguments. In this paper we illuminate the nature of certain anomalous terms in this Lagrangian by an explicit microscopic calculation. We also generalize the corresponding construction to introduce the axion field. We derive an anomalous axion effective Lagrangian describing the interactions of axions with photons and superfluid phonons in the dense matter background. This effective Lagrangian, among other things, implies that an axion current will be induced in the presence of magnetic field. We speculate that this current may be responsible for the explanation of neutron star kicks

  6. Anomalous refraction of infrared waves through ultrathin all dielectric metasurfaces

    Science.gov (United States)

    Vieira, R. A.; Simões de Castro, T. F.; Rodriguez-Esquerre, V. F.

    2017-08-01

    A multipeak Metasurfaces are the two dimensional equivalents of bulk metamaterials [1, 2], which represent a sudden variation of optical properties when an incident wave interacts with it, yielding the most exotic optical phenomena, such as broadband absorption, wavefront shaping or the anomalous refraction and reflection. This paper proposes, through simulations, a model of a purely dielectric metasurface without losses, allowing the incident wave's global phase control, from - π to π, for operation on optical frequencies (1.55 μm) by inserting structures that have contrasting refractive indexes. To demonstrate the phase control, a linear phase profile has been utilized to cause the anomalous refraction phenomena, which has applications in wireless optical communications.

  7. Acceleration, transport and fractionation of anomalous cosmic rays

    International Nuclear Information System (INIS)

    Jokipii, J.R.

    2000-01-01

    The effects acceleration and transport on the charge and elemental composition of anomalous cosmic rays is discussed in the context of the model of acceleration at the solar-wind termination shock. Since the transport coefficients depend on the mass and charge of the particles, changes of composition are expected, both in the acceleration and the transport process. These effects are shown for different species. Special attention will be given to the production of multiply-charged ionic species from the originally singly-charged species, as a result of the acceleration at the termination shock and subsequent propagation. Good agreement is found with these observations, suggesting that the models are capturing much of the basic physics. In particular, the energy where the singly-charged anomalous cosmic rays give way to multiply-charged particles is very sharp and at very nearly the same energy for all species observed, and also in the model

  8. Anomalous Amplitude Attenuation Method to Enhance Seismic Resolution

    Directory of Open Access Journals (Sweden)

    Muchlis .

    2015-05-01

    Full Text Available Anomalous Amplitude Attenuation (AAA is a method to process seismic data with multilevel processing (multi step flow. AAA is indicated for identifying anomalous seismic amplitude (amplitude noise such as: spike noise, noise and noised trace. AAA is a filter applied to the data in the frequency domain, range, both in CMP/CDP, offset or gather shot. Processing of the data depends on how the sensor (the geophone receives seismic waves, and then set the data back into the format demultiplex (SEG-Y and then processed according to the rules (flowchart seismic reflection processing.This method has been applied to improve the old seismic data of an exploration company in prospecting the unseen structure in prospecting the hydrocarbon trapped within sedimentary rock subsurface.

  9. Magnetic resonance imaging of anomalous pulmonary venous connections

    International Nuclear Information System (INIS)

    Choe, Yeon Hyeon; Lee, Heung Jae; Kim, Hak Soo; Ko, Jae Kon; Kim, Ji Eun; Han, Jae Jin

    1994-01-01

    We evaluated the capability of MR in the diagnosis of anomalous pulmonary venous connection (APVC). The patient group consisted of 11 total APVC and 8 partial APVC diagnosed with MR. Echocardiography was performed in all cases, cardiac angiography in 12 cases and operation in 12 cases. We compared MR findings with those of operation, echocardiography and cardiac angiography. In surgically proven 12 cases, diagnostic accuracy of preoperative MR, echocardiography and cardiac angiography was 100%, 67%, and 63%, respectively. In the remaining cases, MR findings well correlated with those of echocardiography or cardiac angiography. Stenosis of common pulmonary vein or superior vena cava was identified in 4 cases. In one patient, MR duplicated associated cortriatriatum clearly. MR is an effective modally in depicting anomalous pulmonary venous connections

  10. Anomalous diffusion and diffusion anomaly in confined Janus dumbbells.

    Science.gov (United States)

    B Krott, Leandro; Gavazzoni, Cristina; Bordin, José Rafael

    2016-12-28

    Self-assembly and dynamical properties of Janus nanoparticles have been studied by molecular dynamic simulations. The nanoparticles are modeled as dimers and they are confined between two flat parallel plates to simulate a thin film. One monomer from the dumbbells interacts by a standard Lennard-Jones potential and the other by a two-length scales shoulder potential, typically used for anomalous fluids. Here, we study the effects of removing the Brownian effects, typical from colloidal systems immersed in aqueous solution, and consider a molecular system, without the drag force and the random collisions from the Brownian motion. Self-assembly and diffusion anomaly are preserved in relation to the Brownian system. Additionally, a superdiffusive regime associated to a collective reorientation in a highly structured phase is observed. Diffusion anomaly and anomalous diffusion are explained in the two length scale framework.

  11. Utilizing Weak Indicators to Detect Anomalous Behaviors in Networks

    Energy Technology Data Exchange (ETDEWEB)

    Egid, Adin [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2017-11-01

    We consider the use of a novel weak in- dicator alongside more commonly used weak indicators to help detect anomalous behavior in a large computer network. The data of the network which we are studying in this research paper concerns remote log-in information (Virtual Private Network, or VPN sessions) from the internal network of Los Alamos National Laboratory (LANL). The novel indicator we are utilizing is some- thing which, while novel in its application to data science/cyber security research, is a concept borrowed from the business world. The Her ndahl-Hirschman Index (HHI) is a computationally trivial index which provides a useful heuristic for regulatory agencies to ascertain the relative competitiveness of a particular industry. Using this index as a lagging indicator in the monthly format we have studied could help to detect anomalous behavior by a particular or small set of users on the network.

  12. Anomalous diffusion and diffusion anomaly in confined Janus dumbbells

    Science.gov (United States)

    Krott, Leandro B.; Gavazzoni, Cristina; Bordin, José Rafael

    2016-12-01

    Self-assembly and dynamical properties of Janus nanoparticles have been studied by molecular dynamic simulations. The nanoparticles are modeled as dimers and they are confined between two flat parallel plates to simulate a thin film. One monomer from the dumbbells interacts by a standard Lennard-Jones potential and the other by a two-length scales shoulder potential, typically used for anomalous fluids. Here, we study the effects of removing the Brownian effects, typical from colloidal systems immersed in aqueous solution, and consider a molecular system, without the drag force and the random collisions from the Brownian motion. Self-assembly and diffusion anomaly are preserved in relation to the Brownian system. Additionally, a superdiffusive regime associated to a collective reorientation in a highly structured phase is observed. Diffusion anomaly and anomalous diffusion are explained in the two length scale framework.

  13. Anomalous Transport of High Energy Cosmic Rays in Galactic Superbubbles

    Science.gov (United States)

    Barghouty, Nasser F.

    2014-01-01

    High-energy cosmic rays may exhibit anomalous transport as they traverse and are accelerated by a collection of supernovae explosions in a galactic superbubble. Signatures of this anomalous transport can show up in the particles' evolution and their spectra. In a continuous-time-random- walk (CTRW) model assuming standard diffusive shock acceleration theory (DSA) for each shock encounter, and where the superbubble (an OB stars association) is idealized as a heterogeneous region of particle sources and sinks, acceleration and transport in the superbubble can be shown to be sub-diffusive. While the sub-diffusive transport can be attributed to the stochastic nature of the acceleration time according to DSA theory, the spectral break appears to be an artifact of transport in a finite medium. These CTRW simulations point to a new and intriguing phenomenon associated with the statistical nature of collective acceleration of high energy cosmic rays in galactic superbubbles.

  14. Demographic fluctuations in a population of anomalously diffusing individuals.

    Science.gov (United States)

    Olla, Piero

    2012-02-01

    The phenomenon of spatial clustering induced by death and reproduction in a population of anomalously diffusing individuals is studied analytically. The possibility of social behaviors affecting the migration strategies has been taken into exam, in the case that anomalous diffusion is produced by means of a continuous time random walk (CTRW). In the case of independently diffusing individuals, the dynamics appears to coincide with that of (dying and reproducing) Brownian walkers. In the strongly social case, the dynamics coincides with that of nonmigrating individuals. In both limits, the growth rate of the fluctuations becomes independent of the Hurst exponent of the CTRW. The social behaviors that arise when transport in a population is induced by a spatial distribution of random traps have been analyzed. © 2012 American Physical Society

  15. Parsing anomalous versus normal diffusive behavior of bedload sediment particles

    Science.gov (United States)

    Fathel, Siobhan; Furbish, David; Schmeeckle, Mark

    2016-01-01

    Bedload sediment transport is the basic physical ingredient of river evolution. Formulae exist for estimating transport rates, but the diffusive contribution to the sediment flux, and the associated spreading rate of tracer particles, are not clearly understood. The start-and-stop motions of sediment particles transported as bedload on a streambed mimic aspects of the Einstein–Smoluchowski description of the random-walk motions of Brownian particles. Using this touchstone description, recent work suggests the presence of anomalous diffusion, where the particle spreading rate differs from the linear dependence with time of Brownian behavior. We demonstrate that conventional measures of particle spreading reveal different attributes of bedload particle behavior depending on details of the calculation. When we view particle motions over start-and-stop timescales obtained from high-speed (250 Hz) imaging of coarse-sand particles, high-resolution measurements reveal ballistic-like behavior at the shortest (10−2 s) timescale, followed by apparent anomalous behavior due to correlated random walks in transition to normal diffusion (>10−1 s) – similar to Brownian particle behavior but involving distinctly different physics. However, when treated as a ‘virtual plume’ over this timescale range, particles exhibit inhomogeneous diffusive behavior because both the mean and the variance of particle travel distances increase nonlinearly with increasing travel times, a behavior that is unrelated to anomalous diffusion or to Brownian-like behavior. Our results indicate that care is needed in suggesting anomalous behavior when appealing to conventional measures of diffusion formulated for ideal particle systems.

  16. Anomalous U(1) as a mediator of Supersymmetry Breaking

    CERN Document Server

    Dvali, Gia; Dvali, Gia; Pomarol, Alex

    1996-01-01

    We point out that an anomalous gauge U(1) symmetry is a natural candida= te for being the mediator and messenger of supersymmetry breaking. It facilitate= s dynamical supersymmetry breaking even in the flat limit. Soft masses are induced by both gravity and the U(1) gauge interactions giving an unusual= mass hierarchy in the sparticle spectrum which suppresses flavor violations. T= his scenario does not suffer from the Polonyi problem.

  17. Nonlinear saturation of dissipative trapped ion instability and anomalous transport

    International Nuclear Information System (INIS)

    Sugihara, Masayoshi; Ogasawara, Masatada.

    1977-04-01

    An expression for the turbulent collision frequency is derived by summing up the most dominant terms from each order in the perturbation expansion in order to obtain the nonlinear saturation level of the dissipative trapped ion instability. Numerical calculation shows that the anomalous diffusion coefficient at the saturated state is in good agreement with the result of Kadomtsev and Pogutse when the effect of the magnetic shear is taken into account. (auth.)

  18. Anomalous scaling in an age-dependent branching model

    OpenAIRE

    Keller-Schmidt, Stephanie; Tugrul, Murat; Eguíluz, Víctor M.; Hernández-García, Emilio; Klemm, Konstantin

    2015-01-01

    We introduce a one-parametric family of tree growth models, in which branching probabilities decrease with branch age $\\tau$ as $\\tau^{-\\alpha}$. Depending on the exponent $\\alpha$, the scaling of tree depth with tree size $n$ displays a transition between the logarithmic scaling of random trees and an algebraic growth. At the transition ($\\alpha=1$) tree depth grows as $(\\log n)^2$. This anomalous scaling is in good agreement with the trend observed in evolution of biological species, thus p...

  19. Anomalous Higgs couplings at an eγ collider

    International Nuclear Information System (INIS)

    Choudhury, Debajyoti; Mamta

    2006-01-01

    We examine the sensitivity of eγ colliders (based on e + e - linear colliders of c.m. energy 500 GeV) to the anomalous couplings of the Higgs to W-boson via the process e - γ→νWH. This has the advantage over e + e - collider in being able to dissociate WWH vertex from ZZH. We are able to construct several dynamical variables which may be used to constrain the various couplings in the WWH vertex

  20. Exchange interpretation of anomalous back angle heavy ion elastic scattering

    International Nuclear Information System (INIS)

    Zisman, M.S.

    1977-10-01

    Anomalous back angle oscillations in the angular distributions obtained in the elastic scattering of 16 O + 28 Si and 12 C + 28 Si have been interpreted in terms of an elastic cluster transfer comparable to that observed in other heavy ion reactions. The calculations appear to at least qualitatively explain the data with respect to the existence and phase of the back angle oscillations. The results indicate that an exchange mechanism may play an important role in the oscillations

  1. The effect of anomalous utterances on language production

    OpenAIRE

    Ivanova, I; Wardlow, L; Warker, J; Ferreira, VS

    2017-01-01

    Speakers sometimes encounter utterances that have anomalous linguistic features. Are such features registered during comprehension and transferred to speakers' production systems? In two experiments, we explored these questions. In a syntactic-priming paradigm, speakers heard prime sentences with novel or intransitive verbs as part of prepositional-dative or double-object structures (e.g., The chef munded the cup to the burglar or The doctor existed the pirate the balloon). Speakers then desc...

  2. Anomalous nuclear enhancement of inclusive spectra at large transverse momentum

    International Nuclear Information System (INIS)

    Krzywicki, Andre.

    1976-01-01

    A parton model interpretation of the anomalous nuclear enhancement of inclusive spectra, observed by Cronin et al is proposed. It seems that the picture representing a nucleus as a collection of quasi-free nucleons in slow relative motion is incorrect when the nucleus is probed during a very short time. This conjecture rests on an extension to nuclei of the Kuti and Weisskopf parton model. A list of observable predictions concerning both hadronic and leptonic interactions with nuclei is given [fr

  3. Anomalous transport in the crowded world of biological cells

    International Nuclear Information System (INIS)

    Höfling, Felix; Franosch, Thomas

    2013-01-01

    A ubiquitous observation in cell biology is that the diffusive motion of macromolecules and organelles is anomalous, and a description simply based on the conventional diffusion equation with diffusion constants measured in dilute solution fails. This is commonly attributed to macromolecular crowding in the interior of cells and in cellular membranes, summarizing their densely packed and heterogeneous structures. The most familiar phenomenon is a sublinear, power-law increase of the mean-square displacement (MSD) as a function of the lag time, but there are other manifestations like strongly reduced and time-dependent diffusion coefficients, persistent correlations in time, non-Gaussian distributions of spatial displacements, heterogeneous diffusion and a fraction of immobile particles. After a general introduction to the statistical description of slow, anomalous transport, we summarize some widely used theoretical models: Gaussian models like fractional Brownian motion and Langevin equations for visco-elastic media, the continuous-time random walk model, and the Lorentz model describing obstructed transport in a heterogeneous environment. Particular emphasis is put on the spatio-temporal properties of the transport in terms of two-point correlation functions, dynamic scaling behaviour, and how the models are distinguished by their propagators even if the MSDs are identical. Then, we review the theory underlying commonly applied experimental techniques in the presence of anomalous transport like single-particle tracking, fluorescence correlation spectroscopy (FCS) and fluorescence recovery after photobleaching (FRAP). We report on the large body of recent experimental evidence for anomalous transport in crowded biological media: in cyto- and nucleoplasm as well as in cellular membranes, complemented by in vitro experiments where a variety of model systems mimic physiological crowding conditions. Finally, computer simulations are discussed which play an important

  4. Anomalous fast diffusion in Cu-NiFe nanolaminates.

    Energy Technology Data Exchange (ETDEWEB)

    Jankowski, Alan F. [Sandia National Laboratories (SNL-CA), Livermore, CA (United States). Energy Nanomaterials Dept.

    2017-09-01

    For this work, the decomposition of the one-dimensional composition wave in Cu-NiFe nanolaminate structures is examined using x-ray diffraction to assess the kinetics of phase decomposition. The anomalously high diffusivity value found for long-term aging at room temperature is attributed to the inherent nanostructure that features paths for short-circuit diffusion in nanolaminates as attributed to interlayer grain boundaries.

  5. Anomalous transport in the crowded world of biological cells.

    Science.gov (United States)

    Höfling, Felix; Franosch, Thomas

    2013-04-01

    A ubiquitous observation in cell biology is that the diffusive motion of macromolecules and organelles is anomalous, and a description simply based on the conventional diffusion equation with diffusion constants measured in dilute solution fails. This is commonly attributed to macromolecular crowding in the interior of cells and in cellular membranes, summarizing their densely packed and heterogeneous structures. The most familiar phenomenon is a sublinear, power-law increase of the mean-square displacement (MSD) as a function of the lag time, but there are other manifestations like strongly reduced and time-dependent diffusion coefficients, persistent correlations in time, non-Gaussian distributions of spatial displacements, heterogeneous diffusion and a fraction of immobile particles. After a general introduction to the statistical description of slow, anomalous transport, we summarize some widely used theoretical models: Gaussian models like fractional Brownian motion and Langevin equations for visco-elastic media, the continuous-time random walk model, and the Lorentz model describing obstructed transport in a heterogeneous environment. Particular emphasis is put on the spatio-temporal properties of the transport in terms of two-point correlation functions, dynamic scaling behaviour, and how the models are distinguished by their propagators even if the MSDs are identical. Then, we review the theory underlying commonly applied experimental techniques in the presence of anomalous transport like single-particle tracking, fluorescence correlation spectroscopy (FCS) and fluorescence recovery after photobleaching (FRAP). We report on the large body of recent experimental evidence for anomalous transport in crowded biological media: in cyto- and nucleoplasm as well as in cellular membranes, complemented by in vitro experiments where a variety of model systems mimic physiological crowding conditions. Finally, computer simulations are discussed which play an important

  6. Anomalous Surface Wave Launching by Handedness Phase Control

    KAUST Repository

    Zhang, Xueqian

    2015-10-09

    Anomalous launch of a surface wave with different handedness phase control is achieved in a terahertz metasurface based on phase discontinuities. The polarity of the phase profile of the surface waves is found to be strongly correlated to the polarization handedness, promising polarization-controllable wavefront shaping, polarization sensing, and environmental refractive-index sensing. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  7. Valoración de la superficie del dializador en la hemodiafiltración on-line. Elección objetiva de la superficie del dializador

    Directory of Open Access Journals (Sweden)

    Francisco Maduell

    2015-05-01

    Conclusión: El incremento del 40% y el 80% de la superficie conlleva un aumento del volumen convectivo de un 6 y un 16% respectivamente, aunque se evidenció una reducción en su máximo rendimiento, mostrando mínimas diferencias tanto en el volumen convectivo como en la capacidad depurativa cuando el CUF era superior a 45 ml/h/mmHg. Es recomendable optimizar el rendimiento de los dializadores a la mínima superficie posible adecuando la prescripción de tratamiento.

  8. Constraints on Anomalous Quartic Gauge Boson Couplings from $\

    CERN Document Server

    Abbiendi, G; Åkesson, P F; Alexander, G; Allison, J; Amaral, P; Anagnostou, G; Anderson, K J; Asai, S; Axen, D A; Azuelos, Georges; Bailey, I; Barberio, E; Barillari, T; Barlow, R J; Batley, J Richard; Bechtle, P; Behnke, T; Bell, K W; Bell, P J; Bella, G; Bellerive, A; Benelli, G; Bethke, Siegfried; Biebel, O; Boeriu, O; Bock, P; Boutemeur, M; Braibant, S; Brigliadori, L; Brown, R M; Büsser, K; Burckhart, H J; Campana, S; Carnegie, R K; Carter, A A; Carter, J R; Chang, C Y; Charlton, D G; Ciocca, C; Csilling, Akos; Cuffiani, M; Dado, S; de Roeck, A; De Wolf, E A; Desch, Klaus; Dienes, B; Donkers, M; Dubbert, J; Duchovni, E; Duckeck, G; Duerdoth, I P; Etzion, E; Fabbri, Franco Luigi; Feld, L; Ferrari, P; Fiedler, F; Fleck, I; Ford, M; Frey, A; Gagnon, P; Gary, J W; Gaycken, G; Geich-Gimbel, C; Giacomelli, G; Giacomelli, P; Giunta, M; Goldberg, J; Gross, E; Grunhaus, Jacob; Gruwé, M; Günther, P O; Sen-Gupta, A; Hajdu, C; Hamann, M; Hanson, G G; Harel, A; Hauschild, M; Hawkes, C M; Hawkings, R; Hemingway, Richard J; Herten, G; Heuer, R D; Hill, J C; Hoffman, K; Horváth, D; Igo-Kemenes, P; Ishii, K; Jeremie, H; Jovanovic, P; Junk, T R; Kanaya, N; Kanzaki, J; Karlen, Dean A; Kawagoe, K; Kawamoto, T; Keeler, Richard K; Kellogg, R G; Kennedy, B W; Kluth, S; Kobayashi, T; Kobel, M; Komamiya, S; Kramer, T; Krieger, P; Von Krogh, J; Krüger, K; Kühl, T; Kupper, M; Lafferty, G D; Landsman, Hagar Yaël; Lanske, D; Layter, J G; Lellouch, D; Letts, J; Levinson, L; Lillich, J; Lloyd, S L; Loebinger, F K; Lü, J; Ludwig, A; Ludwig, J; Mader, W; Marcellini, S; Martin, A J; Masetti, G; Mashimo, T; Mättig, P; McKenna, J A; McPherson, R A; Meijers, F; Menges, W; Merritt, F S; Mes, H; Meyer, N; Michelini, Aldo; Mihara, S; Mikenberg, G; Miller, D J; Moed, S; Mohr, W; Mori, T; Mutter, A; Nagai, K; Nakamura, I; Nanjo, H; Neal, H A; Nisius, R; O'Neale, S W; Oh, A; Oreglia, M J; Orito, S; Pahl, C; Pásztor, G; Pater, J R; Pilcher, J E; Pinfold, J L; Plane, D E; Poli, B; Pooth, O; Przybycien, M B; Quadt, A; Rabbertz, K; Rembser, C; Renkel, P; Roney, J M; Rozen, Y; Runge, K; Sachs, K; Saeki, T; Sarkisyan-Grinbaum, E; Schaile, A D; Schaile, O; Scharff-Hansen, P; Schieck, J; Schörner-Sadenius, T; Schröder, M; Schumacher, M; Scott, W G; Seuster, R; Shears, T G; Shen, B C; Sherwood, P; Skuja, A; Smith, A M; Sobie, R J; Söldner-Rembold, S; Spanó, F; Stahl, A; Strom, D; Ströhmer, R; Tarem, S; Tasevsky, M; Teuscher, R; Thomson, M A; Torrence, E; Toya, D; Tran, P; Trigger, I; Trócsányi, Z L; Tsur, E; Turner-Watson, M F; Ueda, I; Ujvári, B; Vollmer, C F; Vannerem, P; Vertesi, R; Verzocchi, M; Voss, H; Vossebeld, Joost Herman; Ward, C P; Ward, D R; Watkins, P M; Watson, A T; Watson, N K; Wells, P S; Wengler, T; Wermes, N; Wilson, G W; Wilson, J A; Wolf, G; Wyatt, T R; Yamashita, S; Zer-Zion, D; Zivkovic, L

    2004-01-01

    Anomalous quartic couplings between the electroweak gauge bosons may contribute to the vv gamma gamma and qq gamma gamma final states produced in e+e- collisions. This analysis uses the LEP2 OPAL data sample at centre-of-mass energies up to 209 GeV. Event selections identify vv gamma gamma and qq gamma gamma events in which the two photons are reconstructed within the detector acceptance. The cross-section for the process e+e- -> qq gamma gamma is measured. Averaging over all energies, the ratio of the observed e+e- -> qq gamma gamma cross-section to the Standard Model expectation is R(data/SM) = 0.92 +- 0.07 +- 0.04 where the errors represent the statistical and systematic uncertainties respectively. The vv gamma gamma and qq gamma gamma data are used to constrain possible anomalous W+W- gamma gamma and ZZ gamma gamma couplings. Combining with previous OPAL results from the W+W- gamma final state, the 95% confidence level limits on the anomalous coupling parameters aoz, acz, aow and acw are found to be: -0.0...

  9. Small Bowel Obstruction due to Anomalous Congenital Bands in Children

    Directory of Open Access Journals (Sweden)

    Basak Erginel

    2016-01-01

    Full Text Available Introduction. The aim of the study was to evaluate our children who are operated on for anomalous congenital band while increasing the awareness of this rare reason of intestinal obstruction in children which causes a diagnostic challenge. Patients and Methods. We retrospectively reviewed the records of fourteen children treated surgically for intestinal obstructions caused by anomalous congenital bands. Results. The bands were located between the following regions: the ascending colon and the mesentery of the terminal ileum in 4 patients, the jejunum and mesentery of the terminal ileum in 3 patients, the ileum and mesentery of the terminal ileum in 2 patients, the ligament of Treitz and mesentery of the jejunum in one patient, the ligament of Treitz and mesentery of the terminal ileum in one patient, duodenum and duodenum in one patient, the ileum and mesentery of the ileum in one patient, the jejunum and mesentery of the jejunum in one patient, and Meckel’s diverticulum and its ileal mesentery in one patient. Band excision was adequate in all of the patients except the two who received resection anastomosis for intestinal necrosis. Conclusion. Although congenital anomalous bands are rare, they should be considered in the differential diagnosis of patients with an intestinal obstruction.

  10. Anomalous Nernst effect in type-II Weyl semimetals

    Science.gov (United States)

    Saha, Subhodip; Tewari, Sumanta

    2018-01-01

    Topological Weyl semimetals (WSM), a new state of quantum matter with gapless nodal bulk spectrum and open Fermi arc surface states, have recently sparked enormous interest in condensed matter physics. Based on the symmetry and fermiology, it has been proposed that WSMs can be broadly classified into two types, type-I and type-II Weyl semimetals. While the undoped, conventional, type-I WSMs have point like Fermi surface and vanishing density of states (DOS) at the Fermi energy, the type-II Weyl semimetals break Lorentz symmetry explicitly and have tilted conical spectra with electron and hole pockets producing finite DOS at the Fermi level. The tilted conical spectrum and finite DOS at Fermi level in type-II WSMs have recently been shown to produce interesting effects such as a chiral anomaly induced longitudinal magnetoresistance that is strongly anisotropic in direction and a novel anomalous Hall effect. In this work, we consider the anomalous Nernst effect in type-II WSMs in the absence of an external magnetic field using the framework of semi-classical Boltzmann theory. Based on both a linearized model of time-reversal breaking WSM with a higher energy cut-off and a more realistic lattice model, we show that the anomalous Nernst response in these systems is strongly anisotropic in space, and can serve as a reliable signature of type-II Weyl semimetals in a host of magnetic systems with spontaneously broken time reversal symmetry.

  11. A structural framework for anomalous change detection and characterization

    Energy Technology Data Exchange (ETDEWEB)

    Prasad, Lakshman [Los Alamos National Laboratory; Theiler, James P [Los Alamos National Laboratory

    2009-01-01

    We present a spatially adaptive scheme for automatically searching a pair of images of a scene for unusual and interesting changes. Our motivation is to bring into play structural aspects of image features alongside the spectral attributes used for anomalous change detection (ACD). We leverage a small but informative subset of pixels, namely edge pixels of the images, as anchor points of a Delaunay triangulation to jointly decompose the images into a set of triangular regions, called trixels, which are spectrally uniform. Such decomposition helps in image regularization by simple-function approximation on a feature-adaptive grid. Applying ACD to this trixel grid instead of pixels offers several advantages. It allows: (1) edge-preserving smoothing of images, (2) speed-up of spatial computations by significantly reducing the representation of the images, and (3) the easy recovery of structure of the detected anomalous changes by associating anomalous trixels with polygonal image features. The latter facility further enables the application of shape-theoretic criteria and algorithms to characterize the changes and recognize them as interesting or not. This incorporation of spatial information has the potential to filter out some spurious changes, such as due to parallax, shadows, and misregistration, by identifying and filtering out those that are structurally similar and spatially pervasive. Our framework supports the joint spatial and spectral analysis of images, potentially enabling the design of more robust ACD algorithms.

  12. Mechanisms of anomalous dispersion in flow through heterogeneous porous media

    Science.gov (United States)

    Tyukhova, Alina; Dentz, Marco; Kinzelbach, Wolfgang; Willmann, Matthias

    2016-11-01

    We study the origins of anomalous dispersion in heterogeneous porous media in terms of the medium and flow properties. To identify and quantify the heterogeneity controls, we focus on porous media which are organized in assemblies of equally sized conductive inclusions embedded in a constant conductivity matrix. We study the behavior of particle arrival times for different conductivity distributions and link the statistical medium characteristics to large-scale transport using a continuous time random walk (CTRW) approach. The CTRW models particle motion as a sequence of transitions in space and time. We derive an explicit map of the conductivity onto the transition time distribution. The derived CTRW model predicts solute transport based on the conductivity distribution and the characteristic heterogeneity length. In this way, heavy tails in solute arrival times and anomalous particle dispersion as measured by the centered mean square displacement are directly related to the medium properties. These findings shed light on the mechanisms of anomalous dispersion in heterogeneous porous media, and provide a basis for the predictive modeling of large-scale transport.

  13. Degree-strength correlation reveals anomalous trading behavior.

    Science.gov (United States)

    Sun, Xiao-Qian; Shen, Hua-Wei; Cheng, Xue-Qi; Wang, Zhao-Yang

    2012-01-01

    Manipulation is an important issue for both developed and emerging stock markets. Many efforts have been made to detect manipulation in stock markets. However, it is still an open problem to identify the fraudulent traders, especially when they collude with each other. In this paper, we focus on the problem of identifying the anomalous traders using the transaction data of eight manipulated stocks and forty-four non-manipulated stocks during a one-year period. By analyzing the trading networks of stocks, we find that the trading networks of manipulated stocks exhibit significantly higher degree-strength correlation than the trading networks of non-manipulated stocks and the randomized trading networks. We further propose a method to detect anomalous traders of manipulated stocks based on statistical significance analysis of degree-strength correlation. Experimental results demonstrate that our method is effective at distinguishing the manipulated stocks from non-manipulated ones. Our method outperforms the traditional weight-threshold method at identifying the anomalous traders in manipulated stocks. More importantly, our method is difficult to be fooled by colluded traders.

  14. Physiological Laterality of Superficial Cerebral Veins on Susceptibility-Weighted Imaging.

    Science.gov (United States)

    Matsushima, Satoshi; Shimizu, Tetsuya; Gomi, Taku; Fukuda, Kunihiko

    The purpose of this study is to evaluate whether laterality of the superficial cerebral veins can be seen on susceptibility-weighted imaging (SWI) in patients with no intracranial lesions that affect venous visualization. We retrospectively evaluated 386 patients who underwent brain magnetic resonance imaging including SWI in our institute. Patients with a lesion with the potential to affect venous visualization on SWI were excluded. Two neuroradiologists visually evaluated the findings and scored the visualization of the superficial cerebral veins. Of the 386 patients, 315 (81.6%) showed no obvious laterality on venous visualization, 64 (16.6%) showed left-side dominant laterality, and 7 (1.8%) showed right-side dominant laterality. Left-side dominant physiological laterality exists in the visualization of the superficial cerebral veins on SWI. Therefore, when recognizing left-side dominant laterality of the superficial cerebral veins on SWI, the radiologist must also consider the possibility of physiological laterality.

  15. Biomass torrefaction characteristics in inert and oxidative atmospheres at various superficial velocities.

    Science.gov (United States)

    Chen, Wei-Hsin; Lu, Ke-Miao; Liu, Shih-Hsien; Tsai, Chi-Ming; Lee, Wen-Jhy; Lin, Ta-Chang

    2013-10-01

    The reaction characteristics of four biomass materials (i.e. oil palm fiber, coconut fiber, eucalyptus, and Cryptomeria japonica) with non-oxidative and oxidative torrefaction at various superficial velocities are investigated where nitrogen and air are used as carrier gases. Three torrefaction temperatures of 250, 300, and 350 °C are considered. At a given temperature, the solid yield of biomass is not affected by N2 superficial velocity, revealing that the thermal degradation is controlled by heat and mass transfer in biomass. Increasing air superficial velocity decreases the solid yield, especially in oil palm fiber and coconut fiber, implying that the torrefaction reaction of biomass is dominated by surface oxidation. There exists an upper limit of air superficial velocity in the decrement of solid yield, suggesting that beyond this limit the thermal degradation of biomass is no longer governed by surface oxidation, but rather is controlled by internal mass transport. Copyright © 2013 Elsevier Ltd. All rights reserved.

  16. Effects of immobilization on thickness of superficial zone of articular cartilage of patella in rats

    Directory of Open Access Journals (Sweden)

    Khadija Iqbal

    2012-01-01

    Conclusion: Each segment of superficial zone behaves differentially on immobilization and remobilization. Perhaps a much longer duration of remobilization is required to reverse changes of immobilization in articular cartilage and plays a significant role in knee joint movements.

  17. Topographical anatomy of superficial veins, cutaneous nerves, and arteries at venipuncture sites in the cubital fossa.

    Science.gov (United States)

    Mikuni, Yuko; Chiba, Shoji; Tonosaki, Yoshikazu

    2013-01-01

    We investigated correlations among the superficial veins, cutaneous nerves, arteries, and venous valves in 128 cadaveric arms in order to choose safe venipuncture sites in the cubital fossa. The running patterns of the superficial veins were classified into four types (I-IV) and two subtypes (a and b). In types I and II, the median cubital vein (MCV) was connected obliquely between the cephalic and basilic veins in an N-shape, while the median antebrachial vein (MAV) opened into the MCV in type I and into the basilic vein in type II. In type III, the MCV did not exist. In type IV, additional superficial veins above the cephalic and basilic veins were developed around the cubital fossa. In types Ib-IVb, the accessory cephalic vein was developed under the same conditions as seen in types Ia-IVa, respectively. The lateral cutaneous nerve of the forearm descended deeply along the cephalic vein in 124 cases (97 %), while the medial cutaneous nerve of the forearm descended superficially along the basilic vein in 94 (73 %). A superficial brachial artery was found in 27 cases (21 %) and passed deeply under the ulnar side of the MCV. A median superficial antebrachial artery was found in 1 case (1 %), which passed deeply under the ulnar side of the MCV and ran along the MAV. Venous valves were found at 239 points in 28 cases with superficial veins, with a single valve seen at 79 points (33 %) and double valves at 160 points (67 %). At the time of intravenous injection, caution is needed regarding the locations of cutaneous nerves, brachial and superficial brachial arteries, and venous valves. The area ranging from the middle segment of the MCV to the confluence between the MCV and cephalic vein appears to be a relatively safe venipuncture site.

  18. The role of the superficial region in determining the dynamic properties of articular cartilage.

    OpenAIRE

    KELLY, DANIEL JOHN; GANNON, ALANNA

    2012-01-01

    PUBLISHED OBJECTIVE: The objective of this study was to elucidate the role of the superficial region of articular cartilage in determining the dynamic properties of the tissue. It is hypothesised that removal of the superficial region will influence both the flow dependent and independent properties of articular cartilage, leading to a reduction in the dynamic modulus of the tissue. METHODS: Osteochondral cores from the femoropatellar groove of three porcine knee joints were sub...

  19. A Novel Technique of Supra Superficial Musculoaponeurotic System Hyaluronic Acid Injection for Lower Face Lifting

    OpenAIRE

    Sahawatwong, Sinijchaya; Sirithanabadeekul, Punyaphat; Patanajareet, Vasiyapha; Wattanakrai, Penpun; Thanasarnaksorn, Wilai

    2016-01-01

    Background: Various methods attempting to correct sagging of the lower face focus mainly on manipulation of the superficial musculoaponeurotic System. Each technique has its own limitation. The authors propose a relatively simple, conservative method utilizing hyaluronic acid injection just above the superficial musculoaponeurotic System. Objective: To address a novel hyaluronic injection technique to lift the lower face. Methods: Details of the injection techniques are described. The Positio...

  20. Clinical inquiries. How does tissue adhesive compare with suturing for superficial lacerations?

    Science.gov (United States)

    Aukerman, Douglas F; Sebastianelli, Wayne J; Nashelsky, Joan

    2005-04-01

    Tissue adhesives are effective and yield results comparable to those with conventional suturing of superficial, linear, and low-tension lacerations. The cosmetic outcome is similar; wound complications, such as infection and dehiscence, may be lower with tissue adhesives. Wound closure of superficial lacerations by tissue adhesives is quicker and less painful compared with conventional suturing (strength of recommendation: A, systematic reviews of randomized trials).

  1. Clinically silent deep vein thrombosis in patients with superficial thrombophlebitis and varicose veins at legs.

    Science.gov (United States)

    Jerkic, Zoran; Karic, Alen; Karic, Amela

    2009-01-01

    Although superficial thrombophlebitis is a common disorder until recently it was considered as benign disorder. Also it is associated with varicose vein at legs and it was treated effectively with conservative methods, walking and non-steroid anti-inflammatory drugs. Aims of our investigation were: determine frequency of clinically silent deep vein thrombosis at legs in patient with and without superficial thrombophlebitis, determine correlation between superficial thrombophlebitis and deep vein thrombosis regardless of localization of superficial thrombophlebitis in superficial veins of legs and determine adequacy and safety vein phlebography in early diagnosis clinically silent deep vein thrombosis in patients with superficial thrombophlebitis. Using flebography in prospective study was evaluated incidence of clinically silent deep vein thrombosis in 92 patients with varicose veins at legs. By phlebograpy in patients with varicose veins at legs and superficial thrombophlebitis at legs and without clinical signs of DVT at legs of the 49 patients we detected DVT in 12 patients (24, 48%), in three male and nine female. We detected localization of DVT in ilijacofemoral junction in 4,08% patients, although localization of DVT in femoropopliteal region was observed in 6, 12% patients and localization in crural region was in 14.28% patients. Localization of DVT at legs was detected in iliac vein in 16.66% patients, in femoral vein in 25% patients, popliteal vein 8.33% patients, anterior tibial vein 16.66%, posterior tibial vein in 25% and crural veins 8.33% patients. Also we deduced significant difference between two group of patients (chi2 = 10, 76). Such result proves thesis that in most patients with superficial thrombophlebitis and varicose veins is possibility of developing of DVT.

  2. Tension characteristics of the iliotibial tract and role of its superficial layer.

    Science.gov (United States)

    Matsumoto, H; Seedhom, B

    1995-04-01

    Change in tension along the iliotibial tract by sectioning its superficial layer was analyzed using 5 fresh whole cadavers, and the role of the superficial layer was investigated. Tibial attachment of the iliotibial tract (Gerdy's tubercle) was detached and pulled gradually in a distal direction with respect to the femur. Tension along the iliotibial tract by the distal movement of Gerdy's tubercle (stretching the iliotibial tract) was measured first when the whole iliotibial tract was intact, and then when the superficial layer was sectioned at different levels. When the superficial layer was sectioned above the greater trochanter, no significant change in tension was observed from that observed when the whole iliotibial tract was intact. When the superficial layer was sectioned at the middle of the thigh, the tension at Gerdy's tubercle was significantly reduced. It was concluded that not only Kaplan's fibers, those attached to the distal end of the femur and Gerdy's tubercle, but also the superficial layer of the iliotibial tract had an important role in producing tension at Gerdy's tubercle.

  3. Superficial vein thrombosis in non-varicose veins of the lower limbs and thrombophilia.

    Science.gov (United States)

    Lucchi, Gabriella; Bilancini, Salvino; Tucci, Sandro; Lucchi, Massimo

    2017-01-01

    Objectives Superficial vein thrombosis in non-varicose veins of the lower limbs is rather frequent and may be underestimated. This study aims to evaluate the prevalence of inherited or acquired thrombophilia in a sample of outpatients with the disease. Method An observational study was conducted on 73 consecutive superficial vein thrombosis patients tested for inherited or acquired thrombophilia. Results Sixty of 73 patients with superficial vein thrombosis completed the testing protocol, while 13 dropped out; 46 of 60 patients were found to have a thrombophilia (76.6%). The types detected were: factor V Leiden (31/60, i.e. 51.6%), prothrombin mutation (2/60, i.e. 3.3%), MTHFR mutation (23/60, i.e. 38.3%), antiphospholipid antibodies (5/60, i.e. 8.3%), protein C deficit (1/60, i.e. 1.6%), protein S deficit (1/60, i.e. 1.6%), and antithrombin deficit (0/60, i.e. 0%). Conclusions Among patients with superficial vein thrombosis in non-varicose veins, testing demonstrated a high prevalence of thrombophilia. The most common form proved to be factor V Leiden. As thrombophilia was found to be a major cause of superficial vein thrombosis in non-varicose veins, the authors recommend that patients with superficial vein thrombosis in non-varicose veins be investigated for thrombophilia.

  4. Interaction of mobile phones with superficial passive metallic implants

    International Nuclear Information System (INIS)

    Virtanen, H; Huttunen, J; Toropainen, A; Lappalainen, R

    2005-01-01

    The dosimetry of exposure to radiofrequency (RF) electromagnetic (EM) fields of mobile phones is generally based on the specific absorption rate (SAR, W kg -1 ), which is the electromagnetic energy absorbed in the tissues per unit mass and time. In this study, numerical methods and modelling were used to estimate the effect of a passive, metallic (conducting) superficial implant on a mobile phone EM field and especially its absorption in tissues in the near field. Two basic implant models were studied: metallic pins and rings in the surface layers of the human body near the mobile phone. The aim was to find out 'the worst case scenario' with respect to energy absorption by varying different parameters such as implant location, orientation, size and adjacent tissues. Modelling and electromagnetic field calculations were carried out using commercial SEMCAD software based on the FDTD (finite difference time domain) method. The mobile phone was a 900 MHz or 1800 MHz generic phone with a quarter wave monopole antenna. A cylindrical tissue phantom models different curved sections of the human body such as limbs or a head. All the parameters studied (implant size, orientation, location, adjacent tissues and signal frequency) had a major effect on the SAR distribution and in certain cases high local EM fields arose near the implant. The SAR values increased most when the implant was on the skin and had a resonance length or diameter, i.e. about a third of the wavelength in tissues. The local peak SAR values increased even by a factor of 400-700 due to a pin or a ring. These highest values were reached in a limited volume close to the implant surface in almost all the studied cases. In contrast, without the implant the highest SAR values were generally reached on the skin surface. Mass averaged SAR 1g and SAR 10g values increased due to the implant even by a factor of 3 and 2, respectively. However, at typical power levels of mobile phones the enhancement is unlikely to be

  5. Molten salts as stripping media for radioactive superficial decontamination

    Energy Technology Data Exchange (ETDEWEB)

    De Oliveira Lainetti, Paulo Ernesto [Centro de Quimica e Meio Ambiente - CQMA, Instituto de Pesquisas Energeticas e Nucleares IPEN-CNEN/SP, Av. Prof. Lineu Prestes, 2242 C. Universitaria Sao Paulo - SP, CEP- 5508-000 (Brazil)

    2010-07-01

    developments in these fields were started. The mentioned steel structures, during the operations and after ten or twelve years after the facilities shut down, have presented severe corrosion. In the past, to protect them, several layers of paint were applied. Traditional decontamination methods were tried, such as acid pickling, alkaline washing and ultrasonic baths. Nevertheless, these methods have failed to reach effective decontamination. In this paper are described some aspects and problems in decommissioning of IPEN's nuclear fuel cycle facilities and is presented an innovative method for radioactive superficial decontamination of steel structures, with paint and corrosion products removal, using different molten salt compositions and temperatures as stripping media. (author)

  6. Radiotherapy for superficial esophageal cancer of poor risk patients

    International Nuclear Information System (INIS)

    Kagami, Yoshikazu; Ikeda, Hiroshi; Murayama, Shigeyuki; Yamaguchi, Hajime; Tachimori, Yuji; Kato, Hoichi; Watanabe, Hiroshi; Tokuue, Kouichi; Sumi, Minako; Kawashima, Mitsuhiko; Imai, Atsushi; Nakayama, Shuji

    1997-01-01

    Purpose/Objective: The reported incidence of superficial esophageal cancer (SEC) has steadily increased in Japan as result of endoscopic examination has been become common. In Japan, treatment of SEC is endoscopical mucosal resection (EMR) for mucosal cancer or esophagectomy with 3 fields lymph nodes resection for submucosal cancer. Radiotherapy is little place for the management of SEC. Because of some reasons, we treated patients with SEC by radiotherapy alternative to surgery. Purpose of this report is to evaluate efficacy of radiotherapy for SEC. Methods and Materials: Between 1989 to 1996, eighteen patients with SEC were treated with radiotherapy at our hospital. Reasons of radiotherapy that was chosen as the primary methods of treatment were refusal of surgery in one patient, poor medical condition in 4 patients and double primary cancer in 13 patients (head and neck: 11, simultaneously: 11). No patients had indication of EMR. Diagnosis was made by endoscopy and radiography. Some patients were examined with endoscopic ultrasound. Two patients (11.1%) had tumor limited to the mucosa and 16 patients (88.9%) had tumor invaded the submucosa. Seven of these tumors (38.9%) were multicentric. All patients had squamous cell carcinoma. There were 17 male patients and one female patient. The age range was 49 years to 87 years with a median of 62 years. Stage of all patients was T1N0M0 according to UICC staging system. Ten patients underwent external radiotherapy (Ex) (50 Gy - 66 Gy) alone and 8 patients did both Ex and intracavitary radiotherapy (IC) (30-60 Gy of Ex with 5-15 Gy of IC). No patients received chemotherapy. Duration of follow-up was 6 months to 96 months with a median of 30 months. Results: The overall survival rate was 55.9% in 3-year and 14% in 5-year, and the cause-specific 5-year survival rate was 100%. Causes of death were malignant tumor other than esophageal cancer in 4 patients, intercurrent disease other than malignant tumor in 3 patients and no

  7. Terbinafine-loaded wound dressing for chronic superficial fungal infections

    International Nuclear Information System (INIS)

    Paskiabi, Farnoush Asghari; Bonakdar, Shahin; Shokrgozar, Mohammad Ali; Imani, Mohammad; Jahanshiri, Zahra; Shams-Ghahfarokhi, Masoomeh; Razzaghi-Abyaneh, Mehdi

    2017-01-01

    In spite of developing new drugs and modern formulations, the treatments of chronic fungal infections are still challenging. Fibrous wound dressings are new suggestions for the treatment of chronic superficial infections. In the present study, we formulated an antifungal agent, terbinafine hydrochloride (TFH), which is a hydrophobic drug, in wound dressings prepared by electrospun polycaprolactone, polycaprolactone/gelatin (50:50 w/w) and gelatin. To obtain more water-stable meshes, the preparations were treated by glutaraldehyde and their properties were determined before and after treatment. The morphology of fibrous meshes was observed by scanning electron microscopy. Drug loading efficiency and release rate were measured by high performance liquid chromatography (HPLC) and the release rate was monitored for 144 h. Antifungal tests were performed on Trichophyton mentagrophytes, Aspergillus fumigatus and Candida albicans cultured on Muller-Hinton agar. The toxicity of the meshes was measured after 24 h and 14 days by MTT assay. Terbinafine loading of polycaprolactone/gelatin (50:50) was 100% and it released the highest amount of TFH too. In antifungal tests, all samples were able to hinderT. mentagrophytes and A. fumigatus but not C. albicans growth among them, polycaprolactone fibers made the largest inhibition zone. In MTT assay, none of prepared samples showed toxicity against L929 cells. Teken together, the prepared TFH-loaded PCL/gelatin electrospun meshes were able to release TFH slowly and in a steady state in time. With respect to no obvious cytotoxicity in MTT assay and stong antifungal activity toward T. mentagrophytesin vitro, these TFH-based meshes could be considered as potential candidates in clinical application as wound dressing for treatment of chronic dermatophytosis. - Highlights: • Terbinafine (TFH)-loaded PCL/gelatin electrospun fibers were successfully fabricated. • TFH-loaded PCL/gelatin electrospun fibers showed a slow drug release

  8. Anomalous transport phenomena in Fermi liquids with strong magnetic fluctuations

    Energy Technology Data Exchange (ETDEWEB)

    Kontani, Hiroshi [Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)

    2008-02-15

    In this paper, we present recent developments in the theory of transport phenomena based on the Fermi liquid theory. In conventional metals, various transport coefficients are scaled according to the quasiparticles relaxation time, {tau}, which implies that the relaxation time approximation (RTA) holds well. However, such a simple scaling does not hold in many strongly correlated electron systems. The most famous example would be high-T{sub c} superconductors (HTSCs), where almost all the transport coefficients exhibit a significant deviation from the RTA results. This issue has been one of the most significant unresolved problems in HTSCs for a long time. Similar anomalous transport phenomena have been observed in metals near their antiferromagnetic (AF) quantum critical point (QCP). The main goal of this study is to demonstrate whether the anomalous transport phenomena in HTSC is evidence of a non-Fermi liquid ground state, or just RTA violation in strongly correlated Fermi liquids. Another goal is to establish a unified theory of anomalous transport phenomena in metals with strong magnetic fluctuations. For these purposes, we develop a method for calculating various transport coefficients beyond the RTA by employing field theoretical techniques. In a Fermi liquid, an excited quasiparticle induces other excited quasiparticles by collision, and current due to these excitations is called a current vertex correction (CVC). Landau noticed the existence of CVC first, which is indispensable for calculating transport coefficients in accord with the conservation laws. Here, we develop a transport theory involving resistivity and the Hall coefficient on the basis of the microscopic Fermi liquid theory, by considering the CVC. In nearly AF Fermi liquids, we find that the strong backward scattering due to AF fluctuations induces the CVC with prominent momentum dependence. This feature of the CVC can account for the significant enhancement in the Hall coefficient

  9. Anomalous transport phenomena in Fermi liquids with strong magnetic fluctuations

    International Nuclear Information System (INIS)

    Kontani, Hiroshi

    2008-01-01

    In this paper, we present recent developments in the theory of transport phenomena based on the Fermi liquid theory. In conventional metals, various transport coefficients are scaled according to the quasiparticles relaxation time, τ, which implies that the relaxation time approximation (RTA) holds well. However, such a simple scaling does not hold in many strongly correlated electron systems. The most famous example would be high-T c superconductors (HTSCs), where almost all the transport coefficients exhibit a significant deviation from the RTA results. This issue has been one of the most significant unresolved problems in HTSCs for a long time. Similar anomalous transport phenomena have been observed in metals near their antiferromagnetic (AF) quantum critical point (QCP). The main goal of this study is to demonstrate whether the anomalous transport phenomena in HTSC is evidence of a non-Fermi liquid ground state, or just RTA violation in strongly correlated Fermi liquids. Another goal is to establish a unified theory of anomalous transport phenomena in metals with strong magnetic fluctuations. For these purposes, we develop a method for calculating various transport coefficients beyond the RTA by employing field theoretical techniques. In a Fermi liquid, an excited quasiparticle induces other excited quasiparticles by collision, and current due to these excitations is called a current vertex correction (CVC). Landau noticed the existence of CVC first, which is indispensable for calculating transport coefficients in accord with the conservation laws. Here, we develop a transport theory involving resistivity and the Hall coefficient on the basis of the microscopic Fermi liquid theory, by considering the CVC. In nearly AF Fermi liquids, we find that the strong backward scattering due to AF fluctuations induces the CVC with prominent momentum dependence. This feature of the CVC can account for the significant enhancement in the Hall coefficient, magnetoresistance

  10. Normal and anomalous diffusion of gravel tracer particles in rivers

    Science.gov (United States)

    Ganti, Vamsi; Meerschaert, Mark M.; Foufoula-Georgiou, Efi; Viparelli, Enrica; Parker, Gary

    2010-06-01

    One way to study the mechanism of gravel bed load transport is to seed the bed with marked gravel tracer particles within a chosen patch and to follow the pattern of migration and dispersal of particles from this patch. In this study, we invoke the probabilistic Exner equation for sediment conservation of bed gravel, formulated in terms of the difference between the rate of entrainment of gravel into motion and the rate of deposition from motion. Assuming an active layer formulation, stochasticity in particle motion is introduced by considering the step length (distance traveled by a particle once entrained until it is deposited) as a random variable. For step lengths with a relatively thin (e.g., exponential) tail, the above formulation leads to the standard advection-diffusion equation for tracer dispersal. However, the complexity of rivers, characterized by a broad distribution of particle sizes and extreme flood events, can give rise to a heavy-tailed distribution of step lengths. This consideration leads to an anomalous advection-diffusion equation involving fractional derivatives. By identifying the probabilistic Exner equation as a forward Kolmogorov equation for the location of a randomly selected tracer particle, a stochastic model describing the temporal evolution of the relative concentrations is developed. The normal and anomalous advection-diffusion equations are revealed as its long-time asymptotic solution. Sample numerical results illustrate the large differences that can arise in predicted tracer concentrations under the normal and anomalous diffusion models. They highlight the need for intensive data collection efforts to aid the selection of the appropriate model in real rivers.

  11. Anomalous reactive transport in porous media: Experiments and modeling

    Science.gov (United States)

    Edery, Yaniv; Dror, Ishai; Scher, Harvey; Berkowitz, Brian

    2015-05-01

    We analyze dynamic behavior of chemically reactive species in a porous medium, subject to anomalous transport. In this context, we present transport experiments in a refraction-index-matched, three-dimensional, water-saturated porous medium. A pH indicator (Congo red) was used as either a conservative or a reactive tracer, depending on the tracer solution pH relative to that of the background solution. The porous medium consisted of an acrylic polymer material formed as spherical beads that have pH-buffering capacity. The magnitude of reaction during transport through the porous medium was related to the color change of the Congo red, via image analysis. Here, we focused on point injection of the tracer into a macroscopically uniform flow field containing water at a pH different from that of the injected tracer. The setup yielded measurements of the temporally evolving spatial (local-in-space) concentration field. Parallel experiments with the same tracer, but without reactions (no changes in pH), enabled identification of the transport itself to be anomalous (non-Fickian); this was quantified by a continuous time random walk (CTRW) formulation. A CTRW particle tracking model was then used to quantify the spatial and temporal migration of both the conservative and reactive tracer plumes. Model parameters related to the anomalous transport were determined from the conservative tracer experiments. An additional term accounting for chemical reaction was established solely from analysis of the reactant concentrations, and significantly, no other fitting parameters were required. The measurements and analysis emphasized the localized nature of reaction, caused by small-scale concentration fluctuations and preferential pathways. In addition, a threshold radius for pH-controlled reactive transport processes was defined under buffering conditions, which delineated the region in which reactions occurred rapidly.

  12. Anomalous behaviors during infiltration into heterogeneous porous media

    Science.gov (United States)

    Aarão Reis, F. D. A.; Bolster, D.; Voller, V. R.

    2018-03-01

    Flow and transport in heterogeneous porous media often exhibit anomalous behavior. A physical analog example is the uni-directional infiltration of a viscous liquid into a horizontal oriented Hele-Shaw cell containing through thickness flow obstacles; a system designed to mimic a gravel/sand medium with impervious inclusions. When there are no obstacles present or the obstacles form a multi-repeating pattern, the change of the length of infiltration F with time t tends to follow a Fickian like scaling, F ∼t1/2 . In the presence of obstacle fields laid out as Sierpinski carpet fractals, infiltration is anomalous, i.e., F ∼ tn, n ≠ 1/2. Here, we study infiltration into such Hele-Shaw cells. First we investigate infiltration into a square cell containing one fractal carpet and make the observation that it is possible to generate both sub (n 1/2) diffusive behaviors within identical heterogeneity configurations. We show that this can be explained in terms of a scaling analysis developed from results of random-walk simulations in fractal obstacles; a result indicating that the nature of the domain boundary controls the exponent n of the resulting anomalous transport. Further, we investigate infiltration into a rectangular cell containing several repeats of a given Sierpinski carpet. At very early times, before the liquid encounters any obstacles, the infiltration is Fickian. When the liquid encounters the first (smallest scale) obstacle the infiltration sharply transitions to sub-diffusive. Subsequently, around the time where the liquid has sampled all of the heterogeneity length scales in the system, there is a rapid transition back to Fickian behavior. An explanation for this second transition is obtained by developing a simplified infiltration model based on the definition of a representative averaged hydraulic conductivity.

  13. Evaluating optimal superficial limb perfusion at different angles using non-invasive micro-lightguide spectrophotometry.

    Science.gov (United States)

    Darmanin, Geraldine; Jaggard, Matthew; Hettiaratchy, Shehan; Nanchahal, Jagdeep; Jain, Abhilash

    2013-06-01

    It is common practice to elevate the limbs postoperatively to reduce oedema and hence optimise perfusion and facilitate rehabilitation. However, elevation may be counterproductive as it reduces the mean perfusion pressure. There are no clear data on the optimal position of the limbs even in normal subjects. The optimal position of limbs was investigated in 25 healthy subjects using a non-invasive micro-lightguide spectrophotometry system "O2C", which indirectly measures skin and superficial tissue perfusion through blood flow, oxygen saturation and relative haemoglobin concentration. We found a reduction in skin and superficial tissue blood flow of 17% (p=0.0001) on arm elevation (180° shoulder flexion) as compared to heart level and an increase in skin and superficial tissue blood flow of 25% (p=0.02) on forearm elevation of 45°. Lower limb skin and superficial tissue blood flow decreased by 15% (p=0.004) on elevation to 47 cm and by 70% on dependency (p=0.0001) compared to heart level. However, on elevation of the lower limb there was also a 28% reduction in superficial venous pooling (p=0.0001) compared to heart level. In the normal limb, the position for optimal superficial perfusion of the upper limb is with the arm placed at heart level and forearm at 45°. In the lower limb the optimal position for superficial perfusion would be at heart level. However, some degree of elevation may be useful if there is an element of venous congestion. Copyright © 2013 British Association of Plastic, Reconstructive and Aesthetic Surgeons. Published by Elsevier Ltd. All rights reserved.

  14. Urbanization effects on natural radiation in anomalous areas

    International Nuclear Information System (INIS)

    Affonseca, M.S. de.

    1993-10-01

    The urbanization effects and their possible causes on the environmental gamma radiation levels, in an anomalous area, were studied. The field work was accomplished in Guarapari, located in the seacoast of the Brazilian state of Espirito Santo, which is rich in monazite sands, with thorium and uranium contents. The results show clearly that there was a reduction in the levels of external exposition in the streets and squares of Guarapari. It was ascertained that the reduction was due to the materials used in the urbanization. (L.C.J.A.)

  15. Boundary conditions of normal and anomalous diffusion from thermal equilibrium.

    Science.gov (United States)

    Korabel, Nickolay; Barkai, Eli

    2011-05-01

    Infiltration of diffusing particles from one material to another, where the diffusion mechanism is either normal or anomalous, is a widely observed phenomenon. Starting with an underlying continuous-time random-walk model, we derive the boundary conditions for the diffusion equations describing this problem. We discuss a simple method showing how the boundary conditions can be determined from equilibrium experiments. When the diffusion processes are close to thermal equilibrium, the boundary conditions are determined by a thermal Boltzmann factor, which in turn controls the solution of the problem.

  16. Anomalous scaling in an age-dependent branching model.

    Science.gov (United States)

    Keller-Schmidt, Stephanie; Tuğrul, Murat; Eguíluz, Víctor M; Hernández-García, Emilio; Klemm, Konstantin

    2015-02-01

    We introduce a one-parametric family of tree growth models, in which branching probabilities decrease with branch age τ as τ(-α). Depending on the exponent α, the scaling of tree depth with tree size n displays a transition between the logarithmic scaling of random trees and an algebraic growth. At the transition (α=1) tree depth grows as (logn)(2). This anomalous scaling is in good agreement with the trend observed in evolution of biological species, thus providing a theoretical support for age-dependent speciation and associating it to the occurrence of a critical point.

  17. Anomalous dimensions in deformed WZW models on supergroups

    Energy Technology Data Exchange (ETDEWEB)

    Candu, Constantin [Institut fuer Theoretische Physik, Zuerich (Switzerland); Mitev, Vladimir [Humboldt-Universitaet, Berlin (Germany). Inst. fuer Mathematik; Humboldt-Universitaet, Berlin (Germany). Inst. fuer Physik; Schomerus, Volker [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Gruppe Theorie

    2012-11-15

    We investigate a class of current-current, Gross-Neveu like, perturbations of WZW models in which the full left-right affine symmetry is broken to the diagonal global algebra only. Our analysis focuses on those supergroups for which such a perturbation preserves conformal invariance. A detailed calculation of the 2-point functions of affine primary operators to 3-loops is presented. Furthermore, we derive an exact formula for the anomalous dimensions of a large subset of fields to all orders in perturbation theory. Possible applications of our results, including the study of non-perturbative dualities, are outlined.

  18. Anomalous Transport in Natural Fracture Networks Induced by Tectonic Stress

    Science.gov (United States)

    Kang, P. K.; Lei, Q.; Lee, S.; Dentz, M.; Juanes, R.

    2017-12-01

    Fluid flow and transport in fractured rock controls many natural and engineered processes in the subsurface. However, characterizing flow and transport through fractured media is challenging due to the high uncertainty and large heterogeneity associated with fractured rock properties. In addition to these "static" challenges, geologic fractures are always under significant overburden stress, and changes in the stress state can lead to changes in the fracture's ability to conduct fluids. While confining stress has been shown to impact fluid flow through fractures in a fundamental way, the impact of confining stress on transportthrough fractured rock remains poorly understood. The link between anomalous (non-Fickian) transport and confining stress has been shown, only recently, at the level of a single rough fracture [1]. Here, we investigate the impact of geologic (tectonic) stress on flow and tracer transport through natural fracture networks. We model geomechanical effects in 2D fractured rock by means of a finite-discrete element method (FEMDEM) [2], which can capture the deformation of matrix blocks, reactivation of pre-existing fractures, and propagation of new cracks, upon changes in the stress field. We apply the model to a fracture network extracted from the geological map of an actual rock outcrop to obtain the aperture field at different stress conditions. We then simulate fluid flow and particle transport through the stressed fracture networks. We observe that anomalous transport emerges in response to confining stress on the fracture network, and show that the stress state is a powerful determinant of transport behavior: (1) An anisotropic stress state induces preferential flow paths through shear dilation; (2) An increase in geologic stress increases aperture heterogeneity that induces late-time tailing of particle breakthrough curves. Finally, we develop an effective transport model that captures the anomalous transport through the stressed fracture

  19. Simulations of anomalous ion diffusion in experimentally measured turbulent potential

    Czech Academy of Sciences Publication Activity Database

    Seidl, Jakub; Krlín, Ladislav; Pánek, Radomír; Pavlo, Pavol; Stöckel, Jan; Svoboda, V.

    2009-01-01

    Roč. 54, č. 2 (2009), s. 399-407 ISSN 1434-6060. [Symposium on Plasma Physics and Technology/23rd./. Prague, 16.06.2008-19.06.2008] R&D Projects: GA ČR GA202/07/0044; GA AV ČR IAA100430502 Institutional research plan: CEZ:AV0Z20430508 Keywords : plasma turbulence * Lévy- walk * anomalous diffusion * plasma impurities Subject RIV: BL - Plasma and Gas Discharge Physics Impact factor: 1.420, year: 2009 http://www.springerlink.com/content/hn8041u48795847m/

  20. On the anomalous grain size dependence of spall strength

    Science.gov (United States)

    Wilkerson, Justin; Ramesh, Kt

    2017-06-01

    Experimental studies have identified an anomalous grain size dependence of spall strength in a few face-centered cubic metals. Here we derive the first quantitative theory capable of explaining this phenomena. The theory agrees well with experimental measurements and atomistic calculations over a very wide range of conditions. Utilizing this theory, we are able to map out three distinct regimes in which spall strength (i) increases with decreasing grain size in accordance with conventional wisdom, (ii) non-intuitively decreases with decreasing grain size, and (iii) is independent of grain size. The theory also predicts microscopic characteristics of the spall fracture surface, which agree with available data.