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Sample records for ebstein anomaly

  1. Ebstein's Anomaly, Left Ventricular Noncompaction, and Sudden Cardiac Death

    Science.gov (United States)

    McGee, Michael; Warner, Luke; Collins, Nicholas

    2015-01-01

    Ebstein's anomaly is a congenital disorder characterized by apical displacement of the septal leaflet of the tricuspid valve. Ebstein's anomaly may be seen in association with other cardiac conditions, including patent foramen ovale, atrial septal defect, and left ventricular noncompaction (LVNC). LVNC is characterized by increased trabeculation within the left ventricular apex. Echocardiography is often used to diagnose LVNC; however, magnetic resonance (MR) imaging offers superior characterization of the myocardium. We report a case of sudden cardiac death in a patient with Ebstein's anomaly with unrecognized LVNC noted on post mortem examination with screening documenting the presence of LVNC in one of the patient's twin sons. PMID:26240764

  2. Ebstein anomaly and Trisomy 21: A rare association

    OpenAIRE

    Stephanie L Siehr; Rajesh Punn; Priest, James R.; Alexander Lowenthal

    2014-01-01

    This is a case report of a patient with Trisomy 21 with Ebstein anomaly, a ventricular septal defect, and acquired pulmonary vein stenosis; a rare combination, diagnosed during a routine neonatal examination.

  3. Ebstein anomaly and Trisomy 21: A rare association

    Directory of Open Access Journals (Sweden)

    Stephanie L Siehr

    2014-01-01

    Full Text Available This is a case report of a patient with Trisomy 21 with Ebstein anomaly, a ventricular septal defect, and acquired pulmonary vein stenosis; a rare combination, diagnosed during a routine neonatal examination.

  4. Cone Reconstruction of Atypical Ebstein Anomaly Associated with Right Ventricular Apical Hypoplasia.

    Science.gov (United States)

    Reddin, Gemma; Poterucha, Joseph T; Dearani, Joseph A; Warnes, Carole A; Cetta, Frank

    2016-02-01

    Cone reconstruction for tricuspid valve repair has revolutionized the surgical treatment of Ebstein anomaly. We present the case of a 58-year-old woman with atypical Ebstein anomaly and right ventricular apical hypoplasia who was spared from palliative shunt physiology by our use of cone reconstruction. Compared with other techniques, cone reconstruction of the tricuspid valve more closely replicates normal valvular anatomy and function. This surgical procedure can be applied to many anatomic variations of Ebstein anomaly, as in our patient's apparently unique instance of atypical Ebstein anomaly with right ventricular apical hypoplasia.

  5. Value of radionuclide angiogram for the diagnosis of Ebstein's anomaly.

    Science.gov (United States)

    Gould, L; Gopalaswamy, C; Yang, D; Patel, D M; Kim, B S; Patel, C

    1984-12-01

    A radionuclide angiogram in a patient with Ebstein's anomaly showed a very dilated right atrium with a minimally enlarged right ventricle and a normal sized left ventricle. This study led to the establishment of a definitive diagnosis by means of an echocardiogram. Late close of the tricuspid valve was demonstrated. In addition prolapse of the tricuspid and mitral valves was documented. A tricuspid valve prolapse has never been reported in this condition.

  6. Pure duplication of the distal long arm of chromosome 15 with ebstein anomaly and clavicular anomaly.

    Science.gov (United States)

    O'Connor, Rachel; Al-Murrani, Amel; Aftimos, Salim; Asquith, Philip; Mazzaschi, Roberto; Eyrolle-Guignot, Dominique; George, Alice M; Love, Donald R

    2011-01-01

    This report is of a patient with pure trisomy of 15q24-qter who presents with the rare Ebstein anomaly and a previously unreported skeletal anomaly. Chromosome microarray analysis allowed high-resolution identification of the extent of the trisomy and provided a means of achieving higher-resolution breakpoint data. The phenotypic expression of unbalanced chromosomal regions is a complex phenomenon, and fine mapping of the involved region, as described here, is only a first step on the path to its full understanding. Overexpression of the LINGO-1 and CSPG4 genes has been implicated in developmental delay seen in other patients with trisomy of 15q24-qter, but our patient is currently too young to ascertain developmental progress. The genetic underpinning of Ebstein anomaly and the skeletal anomaly reported here is unclear based on our high-resolution dosage mapping.

  7. Pure Duplication of the Distal Long Arm of Chromosome 15 with Ebstein Anomaly and Clavicular Anomaly

    Directory of Open Access Journals (Sweden)

    Rachel O'Connor

    2011-01-01

    Full Text Available This report is of a patient with pure trisomy of 15q24-qter who presents with the rare Ebstein anomaly and a previously unreported skeletal anomaly. Chromosome microarray analysis allowed high-resolution identification of the extent of the trisomy and provided a means of achieving higher-resolution breakpoint data. The phenotypic expression of unbalanced chromosomal regions is a complex phenomenon, and fine mapping of the involved region, as described here, is only a first step on the path to its full understanding. Overexpression of the LINGO-1 and CSPG4 genes has been implicated in developmental delay seen in other patients with trisomy of 15q24-qter, but our patient is currently too young to ascertain developmental progress. The genetic underpinning of Ebstein anomaly and the skeletal anomaly reported here is unclear based on our high-resolution dosage mapping.

  8. Pure Duplication of the Distal Long Arm of Chromosome 15 with Ebstein Anomaly and Clavicular Anomaly

    OpenAIRE

    Rachel O'Connor; Amel Al-Murrani; Salim Aftimos; Philip Asquith; Roberto Mazzaschi; Dominique Eyrolle-Guignot; George, Alice M.; Love, Donald R.

    2011-01-01

    This report is of a patient with pure trisomy of 15q24-qter who presents with the rare Ebstein anomaly and a previously unreported skeletal anomaly. Chromosome microarray analysis allowed high-resolution identification of the extent of the trisomy and provided a means of achieving higher-resolution breakpoint data. The phenotypic expression of unbalanced chromosomal regions is a complex phenomenon, and fine mapping of the involved region, as described here, is only a first step on the path to...

  9. Ebstein's anomaly with coarctation of the aorta. An unusual association

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    Munir Ebaid

    1999-08-01

    Full Text Available Ebstein's anomaly with coarctation of the aorta is an extremely unusual condition. In this report, the clinical and surgical features of 3 male patients, aged 7 months, 4 years and 14 years, are discussed. All patients were in situs solitus. The first 2 patients had atrioventricular and ventriculoarterial discordance and progressed to heart failure in the neonatal period. The third had atrioventricular and ventriculoarterial concordance, as well as Wolf-Parkinson-White syndrome, with frequent episodes of paroxysmal tachycardia. The 3 patients underwent surgery for correction of the coarctation of the aorta. The patient with atrioventricular and ventriculoarterial concordance underwent tricuspid valvuloplasty using a DeVega-like technique. In addition, ablation of 2 anomalous pathways (Kent bundle, which were detected by the electrophysiologic study, was also subsequently performed. The 3 patients showed a good postoperative outcome for 2 years, although, in those with discordance, the surgical procedure did not influence the dysplasia of the tricuspid valve, because this valve showed light to moderate dysfunction.

  10. [Carpentier's procedure for Ebstein's anomaly: successful and failed cases].

    Science.gov (United States)

    Ogawa, K; Yuasa, T; Fujita, K; Yano, Y; Hayase, S; Kidokoro, H; Hattori, T; Koike, A

    1992-06-01

    Two adult cases of Ebstein's anomaly underwent Carpentier's procedure. In the first case longitudinal plication limited to free wall of atrialized ventricle was performed and postoperative course was uneventful. In the second case preoperative echocardiography showed apparently restricted movement of anterior leaflet of the tricuspid valve which was compatible with intraoperative findings. That is, inferior edge of anterior leaflet was partly adherent to ventricular wall and systolic bulging of leaflet was significantly impaired which was left untouched but should be repaired by additional procedure. Six days after operation the tricuspid valve replacement was required for persistent right heart failure due to residual tricuspid regurgitation. In the same case longitudinal plication of atrialized ventricle reported by Carpentier and colleagues resulted in excessively small annulus. Therefore we had to reduce the plication and did not perform following atrial plication to avoid direct injury to conduction system or disturbing coronary venous return. In conclusion exact preoperative evaluation of anterior leaflet of the tricuspid valve especially subvalvular anatomy is essential to Carpentier's procedure, as Carpentier and colleagues emphasized, and conservative longitudinal plication of the atrialized ventricle limited to free wall is favorable when excessively small annulus might be concerned.

  11. Digitalization of the mother in treating hydrops fetalis in monochorionic twin with Ebstein's anomaly. Case report.

    Science.gov (United States)

    Koike, T; Minakami, H; Shiraishi, H; Ogawa, S; Matsubara, S; Honma, Y; Sato, I

    1997-01-01

    Hydrops fetalis thought to be due to Ebstein's anomaly was seen at 22 weeks' gestation in one of two fetuses with a monochorionic placenta. Hydrops was treated with maternal digitalization and resolved by the 28th week of gestation. Hydrops did not recur while maternal digitalization continued. A clinical diagnosis of twin-to-twin transfusion syndrome required termination of the pregnancy at 33 weeks of gestation. The twin with Ebstein's anomaly died 22 hours after birth. The other twin survived and was normal at 19 months of age. Thus, administration of digitalis to the mother controlled hydrops fetalis in one fetus, and ultimately led to the survival of the healthy infant.

  12. Partial PFO Closure for Persistent Hypoxemia in a Patient with Ebstein Anomaly

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    S. A. Zuberi

    2015-01-01

    Full Text Available Ebstein anomaly is characterized by deformities of the anterior leaflet of the tricuspid valve and atrialization of the right ventricle. Patients with severe tricuspid regurgitation are recommended to have tricuspid valve surgery with concomitant atrial septal defect closure. A 73-year-old female with Ebstein anomaly presented with severe hypoxemia. Transthoracic echocardiography revealed severe tricuspid regurgitation and a patent foramen ovale with right-to-left shunting. Complete percutaneous patent foramen ovale closure led to acute decompensation; however, partial closure led to hemodynamic stability and improved oxygenation. In conclusion, similar patients with “patent foramen ovale dependency” from longstanding shunts may benefit from partial patent foramen ovale closure.

  13. The changing epidemiology of Ebstein's anomaly and its relationship with maternal mental health conditions

    DEFF Research Database (Denmark)

    Boyle, Breidge; Garne, Ester; Loane, Maria

    2017-01-01

    OBJECTIVES: The aim of this study was to describe the epidemiology of Ebstein's anomaly in Europe and its association with maternal health and medication exposure during pregnancy. DESIGN: We carried out a descriptive epidemiological analysis of population-based data. SETTING: We included data fr...

  14. Modified Cone Reconstruction of the Tricuspid Valve for Ebstein Anomaly as Performed in Siberia

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    Krivoshchekov, Evgeny V.; Ackerman, Jaeger P.; Yanulevich, Olga S.; Sokolov, Alexander A.; Ershova, Nadezhda V.; Dearani, Joseph A.

    2017-01-01

    The cone reconstruction technique, first described by da Silva and modified by Dearani and by others, has become the repair method of choice in patients with Ebstein anomaly of the tricuspid valve. This report details the outcome of the modified cone reconstruction technique in 6 children who underwent surgical correction of Ebstein anomaly at the Tomsk Institute of Cardiology in Siberia. From 2012 through 2015, 4 boys and 2 girls (age range, 11 mo–12 yr) underwent surgery to correct Ebstein anomaly. All had presented with cyanosis, exertional dyspnea, fatigue, or new-onset atrial arrhythmia, and none had undergone previous cardiac surgery. All survived the operation. One patient needed tricuspid valve replacement with a bioprosthesis after early breakdown of the cone reconstruction. As of December 2016, all the patients had no symptoms, tricuspid stenosis, or arrhythmia. This series indicates that cone reconstruction—the most anatomic repair technique for the dysmorphic Ebstein tricuspid valve—can be successfully performed in pediatric heart centers with a large experience.

  15. Ebstein anomaly: Genetic heterogeneity and association with microdeletions 1p36 and 8p23.1.

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    Digilio, Maria Cristina; Bernardini, Laura; Lepri, Francesca; Giuffrida, Maria Grazia; Guida, Valentina; Baban, Anwar; Versacci, Paolo; Capolino, Rossella; Torres, Barbara; De Luca, Alessandro; Novelli, Antonio; Marino, Bruno; Dallapiccola, Bruno

    2011-09-01

    Ebstein anomaly is an uncommon congenital heart defect (CHD), characterized by downward displacement of the tricuspid valve into the right ventricle. To uncover the genetic associations with Ebstein anomaly, we have searched chromosomal imbalances using standard cytogenetic and array-CGH analysis, and single gene conditions associated with syndromic Ebstein anomaly (with extracardiac anomalies), and screened GATA4 and NKX2.5 mutations in nonsyndromic patients (without extracardiac anomalies). Between January 1997 and September 2009, 44 consecutive patients with Ebstein anomaly were evaluated in two centers of Pediatric Cardiology. Ebstein anomaly was syndromic in 12 (27%) patients, and nonsyndromic in 32 (73%). A recognizable syndrome or complex was diagnosed by clinical criteria in seven patients. In one syndromic patient an 18q deletion was diagnosed by standard cytogenetic analysis. Array-CGH analysis performed in 10 of the 12 syndromic patients detected an interstitial deletion of about 4 Mb at 8p23.1 in one patient, and a deletion 1pter > 1p36.32/dup Xpter- > Xp22.32 in another patient. In the 28 of 32 nonsyndromic patients who underwent molecular testing, no mutation in GATA4 and NKX2.5 genes were detected. We conclude that Ebstein anomaly is a genetically heterogeneous defect, and that deletion 1p36 and deletion 8p23.1 are the most frequent chromosomal imbalances associated with Ebstein anomaly. Candidate genes include the GATA4 gene (in patients with del 8p23.1), NKX2.5 (based on published patients with isolated Ebstein anomaly) and a hypothetical gene in patients with del 1p36). Copyright © 2011 Wiley-Liss, Inc.

  16. Anesthetic considerations of an emergency decompressive craniotomy complicated with Ebstein's anomaly and atrial septal defect

    Institute of Scientific and Technical Information of China (English)

    XIN Xin; TANG Shuai; WANG Ling; ZHAO Jing; LI Gui-lin; GUO Li-lin; HUANG Yu-guang

    2011-01-01

    Despite considerable published papers regarding Ebstein's anomaly (EA) patients receiving open-heart tricuspid valve replacement, non-cardiac emergency surgeries were rarely reported. We report a case of emergency decormpressive craniotormy in a patient with EA. Anesthesiologists should pay special attention to the complications and anesthetic management during the non-cardiac surgeries performed in EA patients.hile papers regarding Ebstein's anomaly (EA)patients receiving open-heart tricuspid valve replacement are numerous, the reports of non-cardiac emergency surgeries have not been to the same degree.We report a case of emergency decompressive craniotomy in a patient with EA. This case report describes the symptoms and anesthetic management during the surgery.

  17. Right atrial aneurysm with downward displacement of the anterior leaflet that resembled Ebstein's anomaly.

    Science.gov (United States)

    Yamauchi, Sanae; Suzuki, Yasuyuki; Daitoku, Kazuyuki; Kimura, Masaomi; Okumura, Ken; Fukuda, Ikuo

    2016-06-08

    A 13-year-old boy presented with right atrial aneurysm and downward displacement of the anterior leaflet in the tricuspid valve into the right ventricle, without tricuspid valve regurgitation. Paroxysmal atrial flutter was caused by an abnormal electrical re-entry circuit, which could not be treated using catheter radiofrequency ablation. Therefore, the patient underwent surgical ablation and resection of the enlarged right atrial wall. The anterior leaflet of the tricuspid valve was plastered and displaced downward into the right ventricle, which resembled Ebstein's anomaly. Pathological evaluation revealed a thin wall that contained fibrous tissue with lipomatous degeneration and few muscular elements. No postoperative arrhythmia was observed.

  18. A Case Report of Stroke in a Woman with Paradoxical Embolism Associated with Ebstein's Anomaly

    Directory of Open Access Journals (Sweden)

    M. Mazdeh

    2014-04-01

    Full Text Available Introduction: Ebstein's anomaly (EA is a rare congenital malformation of the tricuspid valve, often associated with PFO, which is present in 80-90% of patients & predisposes to para-doxical embolization. Case Report: The case described was a 30 year old female, in the post partum phase, (ten days after normal vaginal delivery who was presented to the emergency department with seizure & Rt sided hemiplegia & aphasia. On brain computed tomography scan there was large in-farct of Lt sided hemisphere in fronto temporopartial, and her brain MRI subsequently con-firmed the infarct. Laboratory tests including coagulation study & infectious tests were nor-mal. But electrocardiogram showed AG block grade I. Trans thoracic and Trans esophageal echocardiography revealed Ebstein's anomaly. Dynamic cardiac MRI showed severe tricus-pid regurgitation due to sown ward displacement of tricuspid valve to apical heart associated with patent foramen oral & ASD (Ejection fraction of right chamber was normal and no evi-dence of clot. Conclusion: After ruling out the other diagnoses, paradoxical emboli was considered as the cause leading to the stroke in this case. (Sci J Hamadan Univ Med Sci 2014; 21 (1:72-75

  19. Monochorionic-diamniotic discordant growth in a twin pregnancy with one fetus affected by Ebstein's anomaly of tricuspid leaflets.

    Science.gov (United States)

    Fukami, Tatsuya; Goto, Maki; Matsuoka, Sakiko; Sorano, Sumire; Tohyama, Atsushi; Yamamoto, Hiroko; Nakamura, Sumie; Matsuoka, Ryoei; Tsujioka, Hiroshi; Eguchi, Fuyuki

    2016-07-01

    Our patient was diagnosed as having discordant twin growth with Ebstein's anomaly in the larger fetus. Cardiac function was deteriorated in accordance with progression of gestational age. Our observation indicated cardiac failure of the larger fetus. The most important issue in this situation is management of the timing of delivery.

  20. Paradoxical embolism associated with Ebstein's anomaly in an adult: case report.

    Science.gov (United States)

    Melão, Filipa; Correia, Ana Sofia; Maciel, Maria Júlia

    2013-12-01

    Ebstein's anomaly (EA) is a rare congenital malformation of the tricuspid valve, often associated with other cardiac malformations, especially atrial septal defect, which is present in 80-90% of patients and predisposes to paradoxical embolization. We describe the case of a 47-year-old male, a drug abuser, with a known but not investigated cardiac murmur. He presented to the emergency department with worsening exertional dyspnea and fatigue associated with recent recurrent transient ischemic attacks. On brain computed tomography there were multiple non-recent ischemic infarctions. Transthoracic echocardiography showed EA with severely dilated right cardiac chambers, right systolic dysfunction and severe tricuspid regurgitation. Contrast and transesophageal echocardiography revealed a patent foramen ovale with right-to-left shunt. After exclusion of other potential causes of the neurologic events, they were assumed to be the consequence of paradoxical embolism.

  1. Thiamine-responsive megaloblastic anemia syndrome with Ebstein anomaly: a case report.

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    Akbari, Mohammad Taghi; Zare Karizi, Shohreh; Mirfakhraie, Reza; Keikhaei, Bijan

    2014-12-01

    Thiamine-responsive megaloblastic anemia (TRMA) or Roger syndrome is a rare autosomal recessive disorder characterized by the occurrence of multiple clinical manifestations including megaloblastic anemia, diabetes mellitus, and sensorineural deafness. A few patients have been also described with congenital cardiac malformations. The patients usually respond to treatment with pharmacological doses of thiamine. Mutations in the SLC19A2 gene, located at chromosome 1q24.2, are responsible for this syndrome. Here, we present two new Iranian TRMA patients who were homozygous for c.697C > T mutation in the SLC19A2 gene. On follow-up, one of the patients showed Ebstein anomaly. The present study confirms the variability of the clinical manifestations caused by the same mutation within patients with TRMA syndrome. Therefore, follow-up of the affected children should be considered.

  2. Acute arterial embolism of left lower extremity caused by paradoxical embolism in Ebstein's anomaly

    Science.gov (United States)

    LI, Jun-Sheng; Ma, Jie; Yan, Zi-Xing; Cheng, Dong-Ming; Chang, Liang; Zhang, Hai-Chun; Liu, Jiang-Yan

    2017-01-01

    Abstract Introduction: Ebstein's anomaly is a benign and stable congenital heart disease for asymptomatic patients. Despite a low incidence of Ebstein's anomaly (EA), patients’ quality of life can be badly affected by EA without positive surgical intervention. Especially EA is associated with other congenital heart disease, such as the atrial septal defect, patent foramen ovale, and arterial embolism exclude other reasons, it is often considered to be the consequence of paradoxical embolism, and surgical intervention must be conducted. Case report: An 11-year-old girl falling off the bed suffered pain from left lower extremity. Echocardiographic evaluation revealed an EA, severe tricuspid regurgitation, and secundum atrial septal defect. Both left leg amputation and cardiac surgery were conducted after recovery. Under the condition of anesthesia cardiopulmonary bypass extracorporeal circulation, atrial septal defect repair and Cone reconstruction of the tricuspid valve were performed. Patient recovered well and left hospital smoothly. Discussion: EA is a rare and complex congenital cardiac malformation. There are about 80% to 90% of EA patients with combined atrial septal defect and patent foramen ovale. Sudden arterial occlusion is very rare especially in childhood. When thoracic roentgenoscopy, arterial blood gas analysis, coagulation test, and echocardiographic of lower extremity deep venous system are all normal, one should consider the possibility of a paradoxical embolism. If patients have the paradoxical embolism or worsening tricuspid regurgitation, the most suitable therapeutic regimen should be chosen according to patients’ condition. With surgical techniques and methods renewed continuously, cone reconstruction of the tricuspid valve has been confirmed in clinical trials, which can use its own tissues to form not only central bloodstream, but also the coaption between leaflet and leaflet. PMID:28151866

  3. Ebstein anomaly

    Science.gov (United States)

    ... use of certain drugs (such as lithium or benzodiazepines) during pregnancy may play a role. The condition ... Stanton BF, St Geme JW, Schor NF. Cyanotic congenital heart lesions. In: Kliegman RM, Stanton BF, St ...

  4. Complex Ebstein's Anomaly in an 86-Year-Old Iranian Man: A Case Report

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    Bahieh Moradi

    2017-03-01

    Full Text Available Ebstein's anomaly is defined as the significant apical displacement of the tricuspid valve causing tricuspid regurgitation. Although a variety of concomitant lesions have been previously described, we herein introduce an unusual presentation.  Our patient was an 86-year-old man with a primary presentation of typical chest pain in the setting of recently diagnosed coronary artery disease with concomitant Ebstein’s anomaly. We found mild-to-moderate tricuspid regurgitation, bicuspid aortic valve, persistent left superior vena cava, and patent foramen ovale. The patient had suffered from chest discomfort on exertion for 2 months with good functional capacity prior to diagnosis. Coronary angiography revealed two-vessel disease. The patient refused surgery. He was treated with medical anti-ischemic therapy. He had good exercise tolerance with relief of chest pain at the latest follow-up. The features demonstrated in this case report suggest that there may be several adult survivors of complex congenital heart diseases requiring individualized surgical treatment plans.

  5. Philosopher, pediatrician, pathologist? John Locke's thoughts on Rhicketts and a missed case of Ebstein's anomaly.

    Science.gov (United States)

    Williams, A N; Wilson, N; Sunderland, R

    2009-02-01

    John Locke (1632-1704) is primarily remembered for his highly influential philosophical works regarded as the engine of the Enlightenment. It is less well known that Locke also was a highly regarded and influential physician. In 1666, Locke performed a postmortem examination of an 18-month-old child who had physical signs of rickets. Locke, a medical student at this time, attributed rickets as the cause of death. However, Locke described and recognized severe cardiac abnormality and speculated that right-to-left interatrial shunting was part of rickets. Locke's clearly described clinical history and postmortem findings are more consistent with a congenital cardiac malformation, an Ebstein's anomaly, in addition to the rickets. Locke did not consider this case as other than rickets. His opinion was not challenged when the case report was re-presented in the past half century. This article forces a reevaluation of the 17th-century understanding of infant cardiovascular physiology and pathology: Locke clearly gives one of the earliest descriptions of right-to-left shunting through the patent foramen ovale. It is unfortunate that Locke apparently did not discuss his postmortem findings with his contemporary Richard Lower (1631-1691), whose celebrated masterpiece on the heart, Tractatus de Corde, was published in 1669.

  6. Ebstein畸形的外科治疗%Surgical treatment of Ebstein anomaly

    Institute of Scientific and Technical Information of China (English)

    程前进; 马黎明; 褚衍林; 李祥; 刘高利; 刘朝亮; 赵永亮; 李庆臣

    2012-01-01

    Objective To summarize the experience in surgical treatment of Ebstein anomaly,and evaluate the therapeutic effect.Methods Thirty-five patients of Ebstein anomaly were treated by operation.New York heart association(NYHA)heart function classⅠ?was in 11 cases,classⅡ?was in 14 cases,class III-Ⅳ?was in 10 cases.The cue of echocardiogram about tricuspid valve regurgitation in 24 cases were severe,5 cases were moderate and 6 cases were mild.Two patients accepted tricuspid valve replacement.Thirty-three cases were accepted tricuspid valve repair and right ventricle folded,in which 2 cases accepted Danielson method,and 31 cases accepted Carpentier method,among them,9 cases accepted one and a half ventricular repair.Associated heart anomaly was corrected at the same time.Results One patient died.There were 2 cases with third degree atrioventricular block after tricuspid valve replacement,2 cases with low cardiac output syndrome and 2 cases with atrial fibrillation combined premature ventricular contraction.The heart was lower by chest X-ray and echocardiogram examination,tricuspid valve regurgitation in 22 cases were disappeared,9 cases were mild,3 cases were moderate.All patients were followed up from 1 month to 7years,tricuspid valve regurgitation in 21 cases were disappeared,12 cases were mild,heart function were class Ⅰ-Ⅱ.Because of heart function aggravation,1 patient was operated again 3 years after operation.Condusions Ebstein anomaly is a rare congenital heart disease,Carpentier method tricuspid valve repair can decrease regurgitation obviously and protect right ventricular function.One and a half ventricular repair should be adopted according to the function of tricuspid valve and right ventricle.%目的 总结Ebstein畸形的手术治疗经验,以提高临床疗效.方法 手术治疗Ebstein 畸形35例,NYHA心功能分级Ⅰ级11例,Ⅱ级14例,III~Ⅳ级10例;超声心动图示:三尖瓣重度反流24例,中度反流5例,轻度反流6例.2

  7. Comparison of the offset distance of the tricuspid septal leaflet in neonates with Ebstein's anomaly and neonates with pulmonary atresia with intact ventricular septum.

    Science.gov (United States)

    Kim, Min Jeong; Yu, Jeong Jin; Kang, So Yeon; Seo, Chang Deok; Baek, Jae Suk; Kim, Young-Hwue; Ko, Jae-Kon

    2015-01-01

    An indexed offset distance of the tricuspid septal leaflet ⩾8 mm/m2 is a quantitative criterion for the diagnosis of Ebstein's anomaly. The purpose of this study was to investigate the validity of this criterion for the discrimination of Ebstein's anomaly from pulmonary atresia with intact ventricular septum in neonatal patients. A total of 122 neonatal patients, 56 with Ebstein's anomaly and 66 with pulmonary atresia with intact ventricular septum, were enrolled. Diagnosis of each anomaly was based on typical morphologic features. Echocardiographic variables, including the offset distance of the tricuspid septal leaflet, were measured via an offline analysis of images recorded before 1 month of age. The offset distance of the tricuspid septal leaflet was indexed by the body surface area, and the indexed offset distances in the Ebstein's anomaly and pulmonary atresia with intact ventricular septum groups were 34.2 mm/m2 (7.1-119.1 mm/m2) and 7.2 mm/m2 (0.0-25.6 mm/m2), respectively. The indexed offset distance was ⩾8 mm/m2 in 29 (43.9%) of the patients with pulmonary atresia with intact ventricular septum; clinical and echocardiographic characteristics were comparable between these 29 patients and the remaining 37 patients with pulmonary atresia with intact ventricular septum. When an indexed offset distance ⩾8 mm/m2 was applied as a cut-off for the diagnosis of Ebstein's anomaly, the sensitivity was 0.963 and the specificity was 0.561. In conclusion, indexed offset distance ⩾8 mm/m2 cannot be used as a cut-off for the diagnosis of complicated Ebstein's anomaly in neonatal patients with pulmonary atresia with intact ventricular septum.

  8. Case report: successful repeat tricuspid valve replacement combined with atrial flutter ablation during correction of Ebstein's anomaly

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    Bockeria L.A.

    2013-09-01

    Full Text Available Patients with Ebstein's anomaly often suffer from a variety of arrhythmias, such as paroxysmal supraventricular tachycardia, atrial fibrillation and atrial flutter, which in turn adversely affects the prognosis of these patients. This is why early diagnosis and treatment can reduce the risk of sudden cardiac death. Patient V. 34 years old admitted to the department of surgical treatment of interactive pathology Bakoulev's Сenter for Сardiovascular Surgery RAMS. In 1987 the patient underwent tricuspid valve replacement with bioprosthesis made of aortic valve of a pig. After the operation he felt well. Worsening of the disease was noticed in July 2012. Due to worsening of the symptoms the patient admitted to a hospital. Dysfunction of bioprosthesis with calcification and insufficiency were revealed. Atrial flutter was diagnosed as well. 19.10.2012 redo tricuspid valve replacement with bioprosthesis Bioglis (28 in diameter, cryoablation of right isthmus and the dase of right atrial appendage with Atri Cure system. The patient was discharged on postoperative day 12. He felt well and was sent to supervision of cardiologist for follow-up.

  9. 儿童Ebstein畸形的外科治疗%Surgical treatment of children with Ebstein's anomaly in 31 cases

    Institute of Scientific and Technical Information of China (English)

    俞建根; 石卓; 孙柏平; 马良龙; 舒强; 张泽伟; 李建华; 朱雄凯

    2011-01-01

    Objective To study the surgical treatment for Ebstein's anomaly in children.Methods From August 1992 to August 2010,there were 31 cases of Ebstein's anomaly in children underwent surgical repair,including thirteen males and eighteen females,aged from 6 months to fifteen years[mean(6.9±1.6) years] and the weight was from 5.5 to 53.5 kg[mean(19.6±4.7)kg].Eight patients underwent Danielson repair of tricuspid valve,among these 2 patients were added bidirectional Glenn operation;23 patients underwent Carpentier repair of tricuspid valve,among these 5 patients were added bidirectional Glenn operation.The results of 31 cases of Ebstein's anomaly in children were retrospectively analyzed.Results There was no postoperative death with Carpentier repair of tricuspid valve.All survivals were in New York Heart Association class Ⅰ.Postoperative tricuspid regurgitation was markedly improved,echocardiography showed disappearance of tricuspid incompetence in 9 patients,mild incompetence in 13 and moderate incompetence in 1.There was one postoperative death with Danielson repair of tricuspid valve,and main causes of death were tachyarrhythmia and continuance hypoxia.All survivals were in New York Heart Association class Ⅰ.Postoperative echocardiaography showed disappearance of tricuspid incompetence in 3 patients,mild competence in 3 and moderate mild competence in 2. No reoperation for residual or recurrent tricuspid incompetence was required in all survivals. Conclusions In spite of the variable degree of Ebstein's anomaly present,the majority of patients can undergo a surgical repair.Tricuspid reconstruction should be the first choice of surgical procedures whenever possible in children.Carpentier repair of tricuspid valve is the best procedure at present.The bidirectional Glenn could be adopted according to the function of tricuspid valve and right ventricle.%目的 探讨儿童Ebstein畸形的外科治疗方法.方法 回顾性分析儿

  10. Ebstein Anomaly:An uptodate Review%埃博斯坦畸形诊治进展

    Institute of Scientific and Technical Information of China (English)

    杜睿; 杨丹; 陈玉成(综述)

    2016-01-01

    Ebstein anomaly( EA) is one kind of rare congenital heart disease, which is characterized with apical displacement of tri-cuspid value and right ventricular myopathy.Combined cardiac anomaly is not rare and manifestation is variable.More and more EA patients could survive into adulthood.In recent years, researches in molecular genetics, imaging techniques and surgery technique got rapidly devel-oped, and EA attracted more attention as a very challenging disease.This review aims to provide a comprehensive overview of the state of art knowledge in EA.%埃博斯坦畸形是一种罕见的先天性心脏疾病,主要累及三尖瓣和右室,其主要特征为三尖瓣附着点明显下移,常常合并右室继发改变及合并多种先天畸形,临床变异较大,部分患者可存活至成年。随着对这一疾病的深入认识,特别是基因遗传研究、多模态影像技术以及外科手术水平的提高,在埃博斯坦畸形诊治上近年得到明显的重视。现重点对埃博斯坦畸形诊治上的最新进展做一综述,以加深对埃博斯坦畸形这一罕见疾病的认识。

  11. Morphologic and functional abnormalities in patients with Ebstein's anomaly with cardiac magnetic resonance imaging: Correlation with tricuspid regurgitation.

    Science.gov (United States)

    Liu, Xi; Zhang, Qin; Yang, Zhi-Gang; Guo, Ying-Kun; Shi, Ke; Xu, Hua-Yan; Wen, Ling-Yi; Li, Rui; Chen, Jing

    2016-09-01

    The aim of this study was to assess the correlations of functional and dimensional parameters with the severity of tricuspid regurgitation in patients with Ebstein's anomaly (EA) by using cardiac magnetic resonance (CMR) imaging. Thirty-three patients with EA without previous cardiac surgery and 25 normal individuals were recruited and underwent both cardiac MR imaging and preoperative transthoracic echocardiography. The left ventricular (LV) functional parameters and dimensions of the right ventricle (RV) and LV were measured using 3.0-T cardiac MR imaging. Tricuspid regurgitation severity grading was estimated by echocardiography. The functional and dimensional parameters were compared between EA patients and controls using independent sample t-tests. Spearman's rank correlation was used to determine the correlations between the functional and dimensional parameters and tricuspid regurgitation. Receiver operating characteristic (ROC) analysis was used to predict tricuspid regurgitation severity using individual functional and dimensional parameters. Statistical analysis revealed significant differences in the functional and dimensional parameters between EA patients and controls. Within the EA group, tricuspid valve regurgitation negatively correlated well with the left ventricular ejection fraction (LVEF) (r=-0.558, p=0.001). The ratio of the right ventricular (functional right ventricle) end-diastolic dimension to the left ventricle end-diastolic dimension (RVEDD/LVEDD) in EA patients also correlated well with the severity of tricuspid valve regurgitation (r=0.492, p=0.004). Moreover, ROC analysis revealed that high sensitivity and specificity were obtained for predicting the severity of tricuspid valve regurgitation with LVEF (78.3%, 90.0%) and RVEDD/LVEDD (78.3%, 94.3%). In EA patients, the left and right ventricular functional and dimensional parameters from MRI correlated well with tricuspid regurgitation, which helped predict the severity of EA. Copyright

  12. A técnica do cone para correção da anomalia de Ebstein: resultados imediatos e em longo prazo Cone reconstruction in Ebstein's anomaly repair: early and long-term results

    Directory of Open Access Journals (Sweden)

    José Pedro da Silva

    2011-09-01

    Full Text Available FUNDAMENTO: As principais correções da anomalia de Ebstein (AE baseiam-se na reconstrução monocúspide da valva tricúspide e são limitadas pela frequente necessidade de substituição ou pela alta reincidência de insuficiência valvar. OBJETIVO: Avaliar a viabilidade e os efeitos da correção anatômica da anomalia de Ebstein com a técnica do cone na evolução clínica dos pacientes, na função da valva tricúspide e na morfologia do ventrículo direito. MÉTODOS: Foram comparados os dados clínicos, ecocardiográficos e radiológicos de 52 pacientes consecutivos, com idade média de 18,5 ± 13,8anos, submetidos à técnica do cone, obtidos nos períodos pré-operatório, pós-operatório imediato (POI e em longo prazo (POL. RESULTADOS: Houve dois óbitos hospitalares (3,8% e mais dois durante o seguimento. A classe funcional média de insuficiência cardíaca pré-operatória de 2,2 melhorou para 1,2 após 57 meses de seguimento médio de 97% dos pacientes (p 0,05. A área funcional indexada do VD aumentou de 8,53 ± 7,02 cm2/m2 no préoperatório para 21,01±6,87 cm2/m2 no POI (p 0,05. O índice cardiotorácico médio foi reduzido de 0,66 ± 0,09 para 0,54 ± 0,06 (p BACKGROUND: The main Ebstein anomaly (EA repairs are based on the monocusp reconstruction of the tricuspid valve and are limited by the frequent need for replacement or the high recurrence of valve regurgitation. OBJECTIVE: To evaluate the feasibility and effects of anatomical repair of Ebstein's anomaly using the cone reconstruction technique on patients' clinical evaluation, tricuspid valve function and right ventricular morphology. METHODS: We compared the clinical, echocardiographic and radiological data of 52 consecutive patients, with a mean age of 18.5 ± 13.8 years, submitted to the cone reconstruction technique, obtained in the preoperative, early postoperative (EPO and long-term (LPO periods. RESULTS: There were two in-hospital deaths (3.8% and two more during

  13. Surgical treatment of Ebstein's anomaly by tricuspid valvuloplasty applying autologous pericardium%利用自体心包片修复三尖瓣治疗Ebstein畸形

    Institute of Scientific and Technical Information of China (English)

    刘琛; 邵孟平

    2013-01-01

    目的 介绍一种利用自体心包片修复三尖瓣治疗Ebstein畸形的新方法和临床经验.方法 2008年1月至2012年6月手术治疗8例Ebstein畸形患者,根据Carpentier病理分型,B型1例,C型6例,D型1例.术中在Carpentier术式的基础上,应用戊二醛处理过的自体心包片重建前瓣、后瓣,增加瓣叶对合面积.结果 围术期无死亡.三尖瓣成形术后超声心动图示三尖瓣反流明显减轻.随访3~48个月,超声心动图表现明显改善,所有患者心功能均恢复至Ⅰ~Ⅱ级.结论 利用自体心包片修复三尖瓣治疗Ebstein畸形拓宽了瓣膜成形的适应证,能够更好地恢复三尖瓣的解剖形态及功能.%Objective To introduce a new method for surgical treatment of Ebstein's anomaly by tricuspid valvuloplasty applying autologous pericardium and summarize the clinical experience. Methods Eight patients of Ebstein's anomaly were treated from Jan. ,2008 to June,2012,and divided into one of type B,6 of type C and one of type D based on the Carpentier' s criteria for pathological classification. During the operations, autologous pericardia treated with glutaraldehyde were used to rebuild anterior and posterior valves, and increase the closing area of valves on the basis of the Carpentier method. Results There was no death during the perioperative period. Tricuspid regurgitation was mitigated significantly as indicated by ultrasonic cardiograms after tricuspid valvuloplasty. In the follow-up period of 3 to 48 months, the ultrasonic cardiogram performance was significantly improved and the heart function was restored to NYHA Class I or Ⅱ in all the patients. Conclusions The application of tricuspid valvuloplasty to the treatment of Ebstein s anomaly by autologous pericardium broadens indications for valvoplasty,and is more effective in restoring the anatomical form and functionality of the tricuspid.

  14. Clinical anatomy and surgical treatment of Ebstein's anomaly%Ebstein心脏畸形27例外科治疗分析

    Institute of Scientific and Technical Information of China (English)

    刘高利; 马黎明; 郑善光; 李祥; 程前进; 李庆臣; 赵永亮

    2012-01-01

    Objective To summarize the surgical experience of Ebstein 's anomaly. Methods Twenty-seven Ebstein s anomaly patients aged from 3 years 1 month to 40 years with an average of ( 17 ± 3.5) years underwent operation from February 2006 to February 2011. One patient was treated with simple tricuspid valvuloplasty,5 with Danielson plication of atrialized right ventricle, 16 with Carpentier method, including bidirectional Glenn operation in 5 due to the poor function of right ventricular, and reoperation of mitral valve replacement in one because of mitral valve repair failure. Results No patient died from operation. The transesophageal echocardiology showed minimal to mild tricuspid regurgitation in 23 patients, and moderate tricuspid regurgitation in 4 patients after 1 to 2 weeks from operation. Twenty-five patients were followed up for 2 months to 4 years with an average of 3. 3 ±1.6 years,in which 1 patient died from right ventricular failure, and 1 patient received reoperation of mitral valve replacement; In the remaining, the cardiac function was NYHA I in 16 patients, NYHA I in 5 and NYHA H in 2. Conclusion Tricuspid valve repair is an effective method for Ebsteins anomaly. It can alleviate patients'clinical manifestations , provide better hemodynamics, help the recovery of right ventricular function and improve the quality of life.%目的 总结Ebstein心脏畸形的临床解剖特点与外科治疗经验.方法 2006年2月至2011年2月手术治疗27例Ebstein畸形的患者,行单纯三尖瓣环成形术1例,行Danielson式折叠术5例,Carpentier式折叠术21例,其中5例患儿三尖瓣功能右心室发育差,加行双向Glenn术,2例心脏复跳后三尖瓣瓣叶关闭不良,大量反流,再次阻断行三尖瓣置换术.结果 全组无手术死亡;术后1~2周复查心脏超声见三尖瓣微量至轻度反流23例,中度反流4例.术后25例随访2个月~4年,平均(3.3±1.6)年,随访期间右心功能衰竭死亡1例;

  15. Surgical treatment of Ebstein anomaly in 45 adult patients%45例成人Ebstein畸形的外科治疗

    Institute of Scientific and Technical Information of China (English)

    刘琛; 邵孟平; 洪涛; 丁文军; 赵东; 王春生

    2012-01-01

    Objective To review retrospectively the experience of surgical treatment of Ebstein anomaly in 45 adult patients.Methods Between January 2008 and December 2011,45 adult patients underwent surgery for Ebstein anomaly.There were 14 male and 31 female patients aged 18 to 61 years (mean,39 years).The main symptoms included chest tightness,shortness of breath,palpitation.25 patients had cyanosis,while 6 patients with Wolff-Parkinson-White syndrome.Preoperative echocardiography: The septal downward from 2.5 cm to 7.5 cm,average 4.2 cm; the posterior leaflet downward 3.0 cm to 8.0cm,average 5.1 cm.Tricuspid incompetence was moderate in 6 patients and severe in 29.According to Carpentier classification,5 cases of type A,30 type B,type C in 6 cases.Preoperative New York Heart Association(NYHA) functional class Ⅱin 14 cases,Ⅲ 30 cases,Ⅳ in 1 cases.Surgical procedures included modified Danielson's in 15 patients,modified Carpentier's in 23,and 7 patients underwent tricuspid valve replacement(incloud 4 secondary operations).The ratio of tricuspid valve repair was 84.4%.Autologous pericardium patch was used to reconstruct the septal and posterior leaflets in 5 cases.Intraoperative use of annuloplasty rings in 21 cases.Results There were 2 hospital deaths with a postoperative mortality of 4.4%.The main causes of death were low cardiac output and right heart failure.Operation to discharge time was (8.0 ± 3.8)days.The follow up time was 2 to 46 months.Echocardiography examination: Within the 32 patients of severe tricuspid regurgitation before tricuspid valve plasty,16 patients’ tricuspid regurgitation disappeared,13 patients with mild regurgitation,3 moderate regurgitation.Within 5 patients of moderate tricuspid regurgitation before tricuspid valve plasty,4 cases tricuspid regurgitation disappeared after operation,1 case tricuspid valve mild regurgitation.Tricuspid valve leaflets were at normal levels,the atrialized portion of the ventricular disappeared.The heart

  16. Analysis of surgical treatment of Ebstein anomaly in 30 cases%Ebstein畸形外科治疗30例临床分析

    Institute of Scientific and Technical Information of China (English)

    林毅; 马黎明; 李鲁; 程前进; 李祥; 褚衍林; 王志鸿

    2012-01-01

    Objective To discuss and evaluate operative methods and therapeutic efficacy of Ebstein anomaly. Methods Thirty cases of Ebstein anomaly underwent operation during May 1996 to May 2009 were collected. Ten were male and 20 were female, their age ranged from 3 years to 48 years with a mean age of (17±11) years old. Ten patients were classified as New York Heart Association (NYHA)class I , 14 were class II and 6 in class III~ IV. The tricuspid regurgitation were severe in 16 patients by echocardiogram, while 9 patients were moderate and 5 patients were mild. Two patients had mechanic valve replacement. Twenty—eight patients had tricuspid valve repairment, 3 patients were operated with Danielson's technique and 25 patients were operated with Carpentier's technique. Six patients were performed one and a half ventricular repairment. The complicated heart lesions were corrected at the same time. Results No patient died. There was light tricuspid regurgitation in 16 patients postoperatively. All were followed from 1 month to 14 years. Tricuspid regurgitation was improved except in 2 patients who underwent mechanic valve replacement because tricuspid regurgitation were much severer. Conclusions Tricuspid valve repairment can evidently relieve regurgitation. Whether one and a half ventricular repairment should be adopted can be determined by the function of tricuspid valve and right ventricle.%目的 探讨Ebstein畸形的手术方法及疗效.方法 总结30倒手术治疗Ebstein畸形患者的临床资料,男10例,女20例;年龄3~48岁,平均(17±11)岁;术前心功能Ⅰ级10例,Ⅱ级14例,Ⅲ~Ⅳ级6例.超声心动图提示三尖瓣重度反流16例,中度反流9例,轻度反流5例.全组2例行三尖瓣置换术,其余均行三尖瓣成形术:3例采用Danielson法,25例采用Carpentier法,其中6例行一个半心室矫治术.合并畸形同期矫治.结果 无早期手术死亡病例.术后复查仍有轻度三尖瓣反流16例.随访1个月~14

  17. A comparative study for Danielson procedure with and without prosthetic valve ring in treating Ebstein anomaly%加与不加人工瓣环Danielson成形术矫治Ebstein畸形的比较

    Institute of Scientific and Technical Information of China (English)

    杨毅; 张健群; 甘辉立; 孔晴宇; 王胜洵; 郑斯宏; 伯平; 黄国晖

    2011-01-01

    Objective To compare the results of Danielson procedure with and without prosthetic valve ring in treating Ebstein anomaly and to define the effect of prosthetic valve ring on the procedure.Methods From January 2006 to December 2009,31 cases of Ebstein anomaly over 10 years old were classified as type A or type B according the Carpentier's classification scheme.Patients were treated by Danielson procedure or Danielson procedure plus prosthetic valve ring at Anzhen hospital.They were retrospectively classified as Danielson procedure group (group A,n =19) and Danielson procedure plus prosthetic valve ring group (group B,n =12 ).Results There was 1 early in-hospital death due to lung infection and hypoxemia in group A,and no early death in group B ( Fisher exact test,P =0.51 ).The mean follow-up time was ( 23.0 ± 18.5 ) months (5 -41 months).The cumulative follow-up time was 59.42 patient-years.There was one late death in group A due to the redo tricuspid valve plastic procedure because of severe tricuspid regurgitation,and no late death in group B.With echocardiography inspection,11 patients had mild and 7 had moderate to severe tricuspid regurgitation in group A,and only 2 mild tricuspid regurgitation in group B.The tricuspid valve competence after surgery in group B was better than in group A ( Fisher exact test,P=0.024).The 6-minute walk distance test (6MWD) in group B was significantly better than in group A(415 ±41 )m vs ( 382 ± 46 ) m( t test,P =0.047 ).The New York heart functional class in group B was statistically better than in Group A ( P =0.024).Conclusion Although there was no significant difference in the early and late mortality rate between the two groups after surgery,Danielson procedure plus prosthetic valve ring was better than pure Danielson procedure in prevention of late tricuspid regurgitation recurrence,heart function and 6MWD test during follow-up.%目的 比较应用Danielson成形术与Danielson加人工瓣环矫治Ebstein心脏畸形

  18. 常规及实时三维超声心动图在成人Ebstein畸形诊断中的应用价值%Diagnosis of Ebstein anomaly with conventional and transthoracic real-time three-dimensional echocardiography

    Institute of Scientific and Technical Information of China (English)

    江勇; 王浩; 陆敏杰; 万琳媛; 王吴刚; 张茗卉; 吴伟春; 孙欣

    2015-01-01

    ObjectiveTo explore the value of conventional echocardiography and transthoracic real-time three-dimensional echocardiography (RT3DE) in diagnosis of Ebstein anomaly.MethodsWe investigated the morphology and function of right ventricle (RV) as well as the structure, morphology and regurgitation of tricuspid valve in 61 adult patients with Ebstein anomaly before surgery by using conventional echocardiography and transthoracic RT3DE. Twenty normal adults were enrolled as control group. ResultsThe surface of the tricuspid leaflets, the morphology of the tricuspid annulus as well as the three-dimensional structure of the tricuspid valve were displayed stereoscopically by RT3DE. Complete RV volume data could be acquired in 32 patients of Ebstein anomaly. The apex or part of RV could not be contained in the remaining 29 patients. Thirty-four (55.7%) patients with Ebstein anomaly had severe tricuspid regurgitation, 16 (26.2%) patients had moderate to severe regurgitation, and 11 (18.1%) patients had moderate regurgitation. Compared with the normal adults, patients of Ebstein anomaly showed higher RV end-diastolic volume (EDV), end-systolic volume (ESV), end-diastolic volume index (EDVI), end-systolic volume index (ESVI), stroke volume (SV), RV anterior-posterior diameter (RV), tricuspid valve annular transverse diameter (TV-R), and lower RV ejection fraction(EF) [(273.5±77.7) mlvs (74.3±15.9) ml, (187.1±96.8) mlvs (31.1±9.2) ml, (177.4±53.6) ml/m2vs (43.4±8.2) ml/m2, (121.7±65.5) ml/m2vs (18.4±5.1) ml/m2, (95.9±20.2) ml vs (43.6±8.8) ml, (48.1±13.3) ml/m2vs (19.0±1.9) ml/m2, (56.4±8.9) ml/m2vs (28.5±4.3) ml/m2, (38.3±12.8) %vs (59.3±5.1) %, allP<0.05). The tricuspid regurgitant orifice flow cross-sectional area (EROA) were correlated positively with RV anterior-posterior diameter (r=0.691), ratio of RV and LV anterior-posterior diameter (RV/LV) (r=0.6471).ConclusionTransthoracic RT3DE is a feasible method in addition to conventional two

  19. 三尖瓣下移畸形合并难治性右心衰竭及下肢溃疡1例%Ebstein's anomaly with refractory right-sided heart failure and leg ulcers:a case report

    Institute of Scientific and Technical Information of China (English)

    徐飞; 周忠江

    2015-01-01

    三尖瓣下移畸形又称Ebstein畸形,是一种较为罕见的先天性心脏病,主要病理改变为:三尖瓣(主要隔瓣和后瓣)不附着在瓣环上,而是螺旋形下移至右心室,同时瓣膜及瓣下结构异常。由于右室发育不全及功能障碍和三尖瓣关闭不全导致的右心容量负荷增加,表现为劳累后气急乏力、心悸、发绀和心力衰竭。本文就三尖瓣下移畸形合并难治性右心衰竭及下肢溃疡1例进行报告。%Ebstein malformation is a congenital heart disease characterized pathologically by displacement of the septal leaflet of the tricuspid valve towards the apex of the right ventricle of the heart. Hypoplasia, dysfunction of the right ventricle and tricuspid regurgitation cause an increased volume load of the right heart and result in the clinical manifestations of chest tightness, shortness of breath and fatigue after activities, palpitation, cyanosis and heart failure. We report a case of Ebstein’s anomaly with refractory right heart failure and leg ulcers.

  20. Alcoholism and the Armanni-Ebstein lesion.

    Science.gov (United States)

    Parai, Jacqueline L; Kodikara, Sarathchandra; Milroy, Christopher M; Pollanen, Michael S

    2012-03-01

    The Armanni-Ebstein lesion is a histological change in the kidney consisting of sub-nuclear vacuolation of the proximal tubules. It has been most associated with diabetic ketoacidosis. The vacuoles have been reported to contain glycogen. More recent studies show them to contain fat. Recent papers have associated the Armanni-Ebstein lesion with non-diabetic ketoacidosis. We present 11 cases of alcoholic ketoacidosis where the Armanni-Ebstein lesion was identified. None had a history of diabetes mellitus and none showed any changes of diabetic nephropathy. All 11 cases had raised acetone levels (3-67 mg/100 mL (mean 17.9 mg/100 mL and median value of 16 mg/100 mL). In addition a case of isopropanol poisoning was found to have the Armanni-Ebstein lesion. Isopropanol is converted to acetone but is not associated with acidosis. These results indicate that the Armanni-Ebstein lesion is not specific to diabetes mellitus.

  1. Anomalies.

    Science.gov (United States)

    Online-Offline, 1999

    1999-01-01

    This theme issue on anomalies includes Web sites, CD-ROMs and software, videos, books, and additional resources for elementary and junior high school students. Pertinent activities are suggested, and sidebars discuss UFOs, animal anomalies, and anomalies from nature; and resources covering unexplained phenonmenas like crop circles, Easter Island,…

  2. Anomalía de Ebstein y comunicación interventricular. Una asociación poco frecuente

    OpenAIRE

    Patiño Bahena,Emilia; Yabur Espitia,Mirna; Muñoz Castellanos,Luis; Calderón Colmenero,Juan; Buendía Hernández,Alfonso

    2009-01-01

    La anomalía de Ebstein es una displasia de la válvula tricúspide en la que las valvas septal y posterior se encuentran adosadas a la pared ventricular derecha. La lesión asociada más frecuentemente es la comunicación interauricular y le siguen en frecuencia la estenosis pulmonar y la atresia pulmonar. La asociación con comunicación interventricular (CIV) es rara. Presentamos 3 casos con diagnóstico de anomalía de Ebstein y CIV. Los primeros 2 casos se manifestaron como cardiopatía acianógena ...

  3. Selective serotonin reuptake inhibitor antidepressant use in first trimester pregnancy and risk of congenital anomalies

    DEFF Research Database (Denmark)

    Wemakor, A.; Casson, K.; Garne, E.

    2015-01-01

    Objective / Background The Selective Serotonin Reuptake Inhibitor (SSRI) antidepressants are widely prescribed in pregnancy, but there is evidence that they may cause congenital anomalies, particularly congenital heart defects (CHD). Objective: To determine the specificity of association between...... first trimester pregnancy exposure to individual SSRI and specific congenital anomalies (CAs). Methods Population-based case-malformed control study covering 3.3 million births from 12 EUROCAT registries 1995-2009. CAs included non-syndromic live births, fetal deaths and terminations of pregnancy...... % CI 1.67-6.75, n=9), and Ebstein's anomaly (OR 8.23, 95 % CI 2.91-23.28, n=4) were detected. Statistically significant associations between SSRI and four of the 15 non- CHDsignals (anorectal atresia and stenosis, gastroschisis, renal dysplasia, clubfoot) were found. In all the statistically...

  4. Interventricular cardiac resynchronization with right ventricular apical pacing in a patient with Ebstein's defect.

    Science.gov (United States)

    Maffe, Stefano; Perucca, Antonello; Paffoni, Paola; Signorotti, Fabiana; Pardo, Nicolò Franchetti; Dellavesa, Pierfranco; Parravicini, Umberto; Zenone, Franco; Paino, Anna Maria; Bielli, Massimo; Carola, Federico; Zanetta, Marco

    2008-06-01

    We present the case of a patient with Ebstein's defect surgically corrected, and a complete right bundle branch block (RBBB) documented on echocardiogram. After an episode of near syncope due to a high-grade atrioventricular (AV) block, the patient was assisted with a bicameral DDDR pacemaker implanted with traditional right ventricular apical pacing. After the DDDR, and after stimulation with an AV delay of 180 ms, a narrow QRS complex was observed. Meanwhile, the typical left bundle branch block morphology of the right ventricular pacing and the native RBBB morphology were missing. The QRS complex narrowing persisted, even with physical activity and also with the heart rate progression. An echocardiographic study confirmed an improvement of the cardiac resynchronization parameters with this programmed stimulation.

  5. Anomaly holography

    Energy Technology Data Exchange (ETDEWEB)

    Gripaios, Ben [Rudolf Peierls Centre for Theoretical Physics, University of Oxford, 1 Keble Rd., Oxford OX1 3NP (United Kingdom); Merton College, Oxford OX1 4JD (United Kingdom)], E-mail: b.gripaios1@physics.ox.ac.uk; West, Stephen M. [Rudolf Peierls Centre for Theoretical Physics, University of Oxford, 1 Keble Rd., Oxford OX1 3NP (United Kingdom)], E-mail: s.west1@physics.ox.ac.uk

    2008-01-21

    We consider, in the effective field theory context, anomalies of gauge field theories on a slice of a five-dimensional, anti-de Sitter geometry and their four-dimensional, holographic duals. A consistent effective field theory description can always be found, notwithstanding the presence of the anomalies and without modifying the degrees of freedom of the theory. If anomalies do not vanish, the d=4 theory contains additional pseudoscalar states, which are either present in the low-energy theory as physical, light states, or are eaten by (would-be massless) gauge bosons. We show that the pseudoscalars ensure that global anomalies of the four-dimensional dual satisfy the 't Hooft matching condition and comment on the relevance for warped models of electroweak symmetry breaking.

  6. Anomalia de Ebstein: resultados com a reconstrução cônica da valva tricúspide

    Directory of Open Access Journals (Sweden)

    Silva José Pedro da

    2004-01-01

    Full Text Available OBJETIVO: Analisar os resultados de uma modificação técnica de plastia da valva tricúspide na anomalia de Ebstein. MÉTODOS: De novembro/1993 a agosto/2002, 21 pacientes com anomalia de Ebstein da valva tricúspide, com idades variando de 20 meses a 37 (média: 23 anos, foram submetidos a uma nova técnica de plastia da valva tricúspide, onde o megafolheto anterior tricúspide é desinserido da parede ventricular e do anel valvar, total, ou quase totalmente, transformando-o num cone, cujo vértice permanece fixo na ponta do ventrículo direito e cuja base é suturada ao verdadeiro anel tricúspide, inclusive na região septal, após o ajuste, com uma plicatura do anel, ao tamanho da base do cone. RESULTADOS: Houve um (4,7%, óbito hospitalar, causado por baixo débito cardíaco em portador de miocardiopatia causada pela hipóxia crônica. O tempo médio de seguimento foi de 4 anos e os ecocardiogramas recentes mostraram boa morfologia do ventrículo direito e valva tricúspide com discreta ou mínima insuficiência em 18 pacientes e moderada em 2. Em dois dos três portadores de feixe anômalo foi possível localizá-los e seccioná-los no ato cirúrgico. Não ocorreu bloqueio atrioventricular em nenhum dos pacientes. CONCLUSÃO: A técnica utilizada foi eficiente para a correção da insuficiência tricúspide e a restauração da morfologia do ventrículo direito, e aplicável para todos os tipos anatômicos de Ebstein, exceto o tipo D da classificação de Carpentier.

  7. Anomaly Structure of Supergravity and Anomaly Cancellation

    CERN Document Server

    Butter, Daniel

    2009-01-01

    We display the full anomaly structure of supergravity, including new D-term contributions to the conformal anomaly. This expression has the super-Weyl and chiral U(1)_K transformation properties that are required for implementation of the Green-Schwarz mechanism for anomaly cancellation. We outline the procedure for full anomaly cancellation. Our results have implications for effective supergravity theories from the weakly coupled heterotic string theory.

  8. Chiral anomalies and differential geometry

    Energy Technology Data Exchange (ETDEWEB)

    Zumino, B.

    1983-10-01

    Some properties of chiral anomalies are described from a geometric point of view. Topics include chiral anomalies and differential forms, transformation properties of the anomalies, identification and use of the anomalies, and normalization of the anomalies. 22 references. (WHK)

  9. Tracheobronchial Branching Anomalies

    Energy Technology Data Exchange (ETDEWEB)

    Hong, Min Ji; Kim, Young Tong; Jou, Sung Shick [Soonchunhyang University, Cheonan Hospital, Cheonan (Korea, Republic of); Park, A Young [Soonchunhyang University College of Medicine, Asan (Korea, Republic of)

    2010-04-15

    There are various congenital anomalies with respect to the number, length, diameter, and location of tracheobronchial branching patterns. The tracheobronchial anomalies are classified into two groups. The first one, anomalies of division, includes tracheal bronchus, cardiac bronchus, tracheal diverticulum, pulmonary isomerism, and minor variations. The second one, dysmorphic lung, includes lung agenesis-hypoplasia complex and lobar agenesis-aplasia complex

  10. Competing Orders and Anomalies

    Science.gov (United States)

    Moon, Eun-Gook

    2016-08-01

    A conservation law is one of the most fundamental properties in nature, but a certain class of conservation “laws” could be spoiled by intrinsic quantum mechanical effects, so-called quantum anomalies. Profound properties of the anomalies have deepened our understanding in quantum many body systems. Here, we investigate quantum anomaly effects in quantum phase transitions between competing orders and striking consequences of their presence. We explicitly calculate topological nature of anomalies of non-linear sigma models (NLSMs) with the Wess-Zumino-Witten (WZW) terms. The non-perturbative nature is directly related with the ’t Hooft anomaly matching condition: anomalies are conserved in renormalization group flow. By applying the matching condition, we show massless excitations are enforced by the anomalies in a whole phase diagram in sharp contrast to the case of the Landau-Ginzburg-Wilson theory which only has massive excitations in symmetric phases. Furthermore, we find non-perturbative criteria to characterize quantum phase transitions between competing orders. For example, in 4D, we show the two competing order parameter theories, CP(1) and the NLSM with WZW, describe different universality class. Physical realizations and experimental implication of the anomalies are also discussed.

  11. Anomaly-induced baryogenesis

    CERN Document Server

    Kobakhidze, A

    2004-01-01

    We propose a new mechanism for dynamical generation of the observed baryon asymmetry within the minimal Standard model extended by massive Majorana neutrinos and non-vanishing electroweak Chern-Simons term. We show that electroweak Chern-Simons number is produced in the expanding universe due to the conformal anomaly and subsequently converted into baryon number through the triangle anomaly.

  12. Competing Orders and Anomalies.

    Science.gov (United States)

    Moon, Eun-Gook

    2016-08-08

    A conservation law is one of the most fundamental properties in nature, but a certain class of conservation "laws" could be spoiled by intrinsic quantum mechanical effects, so-called quantum anomalies. Profound properties of the anomalies have deepened our understanding in quantum many body systems. Here, we investigate quantum anomaly effects in quantum phase transitions between competing orders and striking consequences of their presence. We explicitly calculate topological nature of anomalies of non-linear sigma models (NLSMs) with the Wess-Zumino-Witten (WZW) terms. The non-perturbative nature is directly related with the 't Hooft anomaly matching condition: anomalies are conserved in renormalization group flow. By applying the matching condition, we show massless excitations are enforced by the anomalies in a whole phase diagram in sharp contrast to the case of the Landau-Ginzburg-Wilson theory which only has massive excitations in symmetric phases. Furthermore, we find non-perturbative criteria to characterize quantum phase transitions between competing orders. For example, in 4D, we show the two competing order parameter theories, CP(1) and the NLSM with WZW, describe different universality class. Physical realizations and experimental implication of the anomalies are also discussed.

  13. Anomalies on orbifolds

    Energy Technology Data Exchange (ETDEWEB)

    Arkani-Hamed, Nima; Cohen, Andrew G.; Georgi, Howard

    2001-03-16

    We discuss the form of the chiral anomaly on an S1/Z2 orbifold with chiral boundary conditions. We find that the 4-divergence of the higher-dimensional current evaluated at a given point in the extra dimension is proportional to the probability of finding the chiral zero mode there. Nevertheless the anomaly, appropriately defined as the five dimensional divergence of the current, lives entirely on the orbifold fixed planes and is independent of the shape of the zero mode. Therefore long distance four dimensional anomaly cancellation ensures the consistency of the higher dimensional orbifold theory.

  14. Theoretically Optimal Distributed Anomaly Detection

    Data.gov (United States)

    National Aeronautics and Space Administration — A novel general framework for distributed anomaly detection with theoretical performance guarantees is proposed. Our algorithmic approach combines existing anomaly...

  15. Anomaly Detection in Sequences

    Data.gov (United States)

    National Aeronautics and Space Administration — We present a set of novel algorithms which we call sequenceMiner, that detect and characterize anomalies in large sets of high-dimensional symbol sequences that...

  16. Neutrino anomalies without oscillations

    Indian Academy of Sciences (India)

    Sandip Pakvasa

    2000-01-01

    I review explanations for the three neutrino anomalies (solar, atmospheric and LSND) which go beyond the `conventional' neutrino oscillations induced by mass-mixing. Several of these require non-zero neutrino masses as well.

  17. Scattering anomaly in optics

    CERN Document Server

    Silveirinha, Mario G

    2016-01-01

    In time-reversal invariant electronic systems the scattering matrix is anti-symmetric. This property enables an effect, designated here as "scattering anomaly", such that the electron transport does not suffer from back reflections, independent of the specific geometry of the propagation path or the presence of time-reversal invariant defects. In contrast, for a generic time-reversal invariant photonic system the scattering matrix is symmetric and there is no similar anomaly. Here, it is theoretically proven that despite these fundamental differences there is a wide class of photonic platforms - in some cases formed only by time-reversal invariant media - in which the scattering anomaly can occur. It is shown that an optical system invariant under the action of the composition of the time-reversal, parity and duality operators is characterized by an anti-symmetric scattering matrix. Specific examples of photonic platforms wherein the scattering anomaly occurs are given, and it is demonstrated with full wave n...

  18. The Pioneer Anomaly

    CERN Document Server

    de Diego, Jose A

    2008-01-01

    Analysis of the radio-metric data from Pioneer 10 and 11 spacecrafts has indicated the presence of an unmodeled acceleration starting at 20 AU, which has become known as the Pioneer anomaly. The nature of this acceleration is uncertain. In this paper we give a description of the effect and review some relevant mechanisms proposed to explain the observed anomaly. We also discuss on some future projects to investigate this phenomenon.

  19. DREDed Anomaly Mediation

    CERN Document Server

    Boyda, E; Pierce, A T; Boyda, Ed; Murayama, Hitoshi; Pierce, Aaron

    2002-01-01

    We offer a guide to dimensional reduction (DRED) in theories with anomaly mediated supersymmetry breaking. Evanescent operators proportional to epsilon arise in the bare Lagrangian when it is reduced from d=4 to d= (4-2 epsilon) dimensions. In the course of a detailed diagrammatic calculation, we show that inclusion of these operators is crucial. The evanescent operators conspire to drive the supersymmetry-breaking parameters along anomaly-mediation trajectories across heavy particle thresholds, guaranteeing the ultraviolet insensitivity.

  20. Anomalies and gravity

    CERN Document Server

    Mielke, E W

    2006-01-01

    Anomalies in Yang-Mills type gauge theories of gravity are reviewed. Particular attention is paid to the relation between the Dirac spin, the axial current j_5 and the non-covariant gauge spin C. Using diagrammatic techniques, we show that only generalizations of the U(1)- Pontrjagin four--form F^ F= dC arise in the chiral anomaly, even when coupled to gravity. Implications for Ashtekar's canonical approach to quantum gravity are discussed.

  1. SADM potentiometer anomaly investigations

    Science.gov (United States)

    Wood, Brian; Mussett, David; Cattaldo, Olivier; Rohr, Thomas

    2005-07-01

    During the last 3 years Contraves Space have been developing a Low Power (1-2kW) Solar Array Drive Mechanism (SADM) aimed at small series production. The mechanism was subjected to two test programmes in order to qualify the SADM to acceptable levels. During the two test programmes, anomalies were experienced with the Potentiometers provided by Eurofarad SA and joint investigations were undertaken to resolve why these anomalies had occurred. This paper deals with the lessons learnt from the failure investigation on the two Eurofarad (rotary) Potentiometer anomaly. The Rotary Potentiometers that were used were fully redundant; using two back to back mounted "plastic tracks". It is a pancake configuration mounted directly to the shaft of the Slip Ring Assembly at the extreme in-board end of the SADM. It has no internal bearings. The anomaly initially manifested itself as a loss of performance in terms of linearity, which was first detected during Thermal Vacuum testing. A subsequent anomaly manifested itself by the complete failure of the redundant potentiometer again during thermal vacuum testing. This paper will follow and detail the chain of events following this anomaly and identifies corrective measures to be applied to the potentiometer design and assembly process.

  2. Mapeo y ablación por radiofrecuencia a cielo abierto: un caso de taquicardia ventricular refractaria en anomalía de Ebstein

    Directory of Open Access Journals (Sweden)

    Alejandro Olaya

    2017-07-01

    Full Text Available La anomalía de Ebstein es una enfermedad congénita, caracterizada por el desplazamiento y la adherencia de la válvula tricúspide. Las valvas septal y posterior se implantan en posiciones más inferiores, causando insuficiencia tricuspídea, esta condición de forma progresiva genera dilatación y deterioro de la función sistólica ventricular derecha. Comúnmente se asocia a otras entidades, principalmente, a la comunicación interauricular y las arritmias mediadas por vías accesorias. La muerte súbita ocurre en estadios avanzados, usualmente relacionados con episodios de taquicardia ventricular. Este reporte describe un caso de anomalía de Ebstein y tormenta arrítmica, que se sometió a ablación del sustrato arrítmico endo y epicárdico en la porción atrializada del ventrículo derecho, que presentó como complicación intraprocedimiento la perforación del ventrículo, el taponamiento cardiaco y la necesidad urgente de la reparación quirúrgica, realizándose en el intraoperatorio una segunda ablación por radiofrecuencia a cielo abierto con el objetivo de eliminar los potenciales tardíos y los fragmentados remanentes en el área de bajo voltaje de la escara. Veintidós semanas después de la ablación se implantó un cardiodesfibrilador subcutáneo para prevención secundaria de la muerte súbita; en el seguimiento a 14 meses no hubo terapias apropiadas del dispositivo.

  3. Anomalies without Massless Particles

    CERN Document Server

    Gurlanik, Z

    1994-01-01

    Baryon and lepton number in the standard model are violated by anomalies, even though the fermions are massive. This problem is studied in the context of a two dimensional model. In a uniform background field, fermion production arise from non-adiabatic behavior that compensates for the absence of massless modes. On the other hand, for localized instanton-like configurations, there is an adiabatic limit. In this case, the anomaly is produced by bound states which travel across the mass gap. The sphaleron corresponds to a bound state at the halfway point.

  4. Classical Trace Anomaly

    OpenAIRE

    Farhoudi, M.

    1995-01-01

    We seek an analogy of the mathematical form of the alternative form of Einstein's field equations for Lovelock's field equations. We find that the price for this analogy is to accept the existence of the trace anomaly of the energy-momentum tensor even in classical treatments. As an example, we take this analogy to any generic second order Lagrangian and exactly derive the trace anomaly relation suggested by Duff. This indicates that an intrinsic reason for the existence of such a relation sh...

  5. Congenital laryngeal anomalies,

    Directory of Open Access Journals (Sweden)

    Michael J. Rutter

    2014-12-01

    Full Text Available Introduction: It is essential for clinicians to understand issues relevant to the airway management of infants and to be cognizant of the fact that infants with congenital laryngeal anomalies are at particular risk for an unstable airway. Objectives: To familiarize clinicians with issues relevant to the airway management of infants and to present a succinct description of the diagnosis and management of an array of congenital laryngeal anomalies. Methods: Revision article, in which the main aspects concerning airway management of infants will be analyzed. Conclusions: It is critical for clinicians to understand issues relevant to the airway management of infants.

  6. The reactor antineutrino anomalies

    Energy Technology Data Exchange (ETDEWEB)

    Haser, Julia; Buck, Christian; Lindner, Manfred [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany)

    2016-07-01

    Major discoveries were made in the past few years in the field of neutrino flavour oscillation. Nuclear reactors produce a clean and intense flux of electron antineutrinos and are thus an essential neutrino source for the determination of oscillation parameters. Most currently the reactor antineutrino experiments Double Chooz, Daya Bay and RENO have accomplished to measure θ{sub 13}, the smallest of the three-flavour mixing angles. In the course of these experiments two anomalies emerged: (1) the reanalysis of the reactor predictions revealed a deficit in experimentally observed antineutrino flux, known as the ''reactor antineutrino anomaly''. (2) The high precision of the latest generation of neutrino experiments resolved a spectral shape distortion relative to the expected energy spectra. Both puzzles are yet to be solved and triggered new experimental as well as theoretical studies, with the search for light sterile neutrinos as most popular explanation for the flux anomaly. This talk outlines the two reactor antineutrino anomalies. Discussing possible explanations for their occurrence, recent and upcoming efforts to solve the reactor puzzles are highlighted.

  7. Bolivian Bouguer Anomaly Grid

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — A 1 kilometer Bouguer anomaly grid for the country of Bolivia.Number of columns is 550 and number of rows is 900. The order of the data is from the lower left to the...

  8. Minnesota Bouguer Anomaly Grid

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — A 1.5 kilometer Bouguer anomaly grid for the state of Minnesota. Number of columns is 404 and number of rows is 463. The order of the data is from the lower left to...

  9. Astrometric solar system anomalies

    Energy Technology Data Exchange (ETDEWEB)

    Nieto, Michael Martin [Los Alamos National Laboratory; Anderson, John D [PROPULSION LABORATORY

    2009-01-01

    There are at least four unexplained anomalies connected with astrometric data. perhaps the most disturbing is the fact that when a spacecraft on a flyby trajectory approaches the Earth within 2000 km or less, it often experiences a change in total orbital energy per unit mass. next, a secular change in the astronomical unit AU is definitely a concern. It is increasing by about 15 cm yr{sup -1}. The other two anomalies are perhaps less disturbing because of known sources of nongravitational acceleration. The first is an apparent slowing of the two Pioneer spacecraft as they exit the solar system in opposite directions. Some astronomers and physicists are convinced this effect is of concern, but many others are convinced it is produced by a nearly identical thermal emission from both spacecraft, in a direction away from the Sun, thereby producing acceleration toward the Sun. The fourth anomaly is a measured increase in the eccentricity of the Moon's orbit. Here again, an increase is expected from tidal friction in both the Earth and Moon. However, there is a reported unexplained increase that is significant at the three-sigma level. It is produent to suspect that all four anomalies have mundane explanations, or that one or more anomalies are a result of systematic error. Yet they might eventually be explained by new physics. For example, a slightly modified theory of gravitation is not ruled out, perhaps analogous to Einstein's 1916 explanation for the excess precession of Mercury's perihelion.

  10. The Pioneer Anomaly

    Directory of Open Access Journals (Sweden)

    Viktor T. Toth

    2010-09-01

    Full Text Available Radio-metric Doppler tracking data received from the Pioneer 10 and 11 spacecraft from heliocentric distances of 20-70 AU has consistently indicated the presence of a small, anomalous, blue-shifted frequency drift uniformly changing with a rate of ~6 × 10–9 Hz/s. Ultimately, the drift was interpreted as a constant sunward deceleration of each particular spacecraft at the level of aP = (8.74 ± 1.33 × 10–10 m/s2. This apparent violation of the Newton's gravitational inverse square law has become known as the Pioneer anomaly; the nature of this anomaly remains unexplained. In this review, we summarize the current knowledge of the physical properties of the anomaly and the conditions that led to its detection and characterization. We review various mechanisms proposed to explain the anomaly and discuss the current state of efforts to determine its nature. A comprehensive new investigation of the anomalous behavior of the two Pioneers has begun recently. The new efforts rely on the much-extended set of radio-metric Doppler data for both spacecraft in conjunction with the newly available complete record of their telemetry files and a large archive of original project documentation. As the new study is yet to report its findings, this review provides the necessary background for the new results to appear in the near future. In particular, we provide a significant amount of information on the design, operations and behavior of the two Pioneers during their entire missions, including descriptions of various data formats and techniques used for their navigation and radio-science data analysis. As most of this information was recovered relatively recently, it was not used in the previous studies of the Pioneer anomaly, but it is critical for the new investigation.

  11. XYY chromosome anomaly and schizophrenia.

    Science.gov (United States)

    Rajagopalan, M; MacBeth, R; Varma, S L

    1998-02-07

    Sex chromosome anomalies have been associated with psychoses, and most of the evidence is linked to the presence of an additional X chromosome. We report a patient with XYY chromosome anomaly who developed schizophrenia.

  12. Discrete R Symmetries and Anomalies

    OpenAIRE

    Michael Dine(Santa Cruz Institute for Particle Physics and Department of Physics, Santa Cruz CA 95064, U.S.A.); Angelo Monteux(Santa Cruz Institute for Particle Physics, University of California Santa Cruz, 1156 High Street, Santa Cruz, U.S.A.)

    2012-01-01

    We comment on aspects of discrete anomaly conditions focussing particularly on $R$ symmetries. We review the Green-Schwarz cancellation of discrete anomalies, providing a heuristic explanation why, in the heterotic string, only the "model-independent dilaton" transforms non-linearly under discrete symmetries; this argument suggests that, in other theories, multiple fields might play a role in anomaly cancellations, further weakening any anomaly constraints at low energies. We provide examples...

  13. Anomaly-safe discrete groups

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Mu-Chun, E-mail: muchunc@uci.edu [Department of Physics and Astronomy, University of California, Irvine, CA 92697-4575 (United States); Fallbacher, Maximilian, E-mail: m.fallbacher@tum.de [Physik–Department T30, Technische Universität München, James–Franck–Straße 1, 85748 Garching (Germany); Ratz, Michael, E-mail: michael.ratz@tum.de [Physik–Department T30, Technische Universität München, James–Franck–Straße 1, 85748 Garching (Germany); Trautner, Andreas, E-mail: andreas.trautner@tum.de [Physik–Department T30, Technische Universität München, James–Franck–Straße 1, 85748 Garching (Germany); Excellence Cluster Universe, Boltzmannstraße 2, 85748 Garching (Germany); Vaudrevange, Patrick K.S., E-mail: patrick.vaudrevange@tum.de [Excellence Cluster Universe, Boltzmannstraße 2, 85748 Garching (Germany); TUM Institute for Advanced Study, Lichtenbergstraße 2a, 85748 Garching (Germany); Arnold Sommerfeld Center for Theoretical Physics, Ludwig–Maximilians–Universität München, Theresienstraße 37, 80333 München (Germany)

    2015-07-30

    We show that there is a class of finite groups, the so-called perfect groups, which cannot exhibit anomalies. This implies that all non-Abelian finite simple groups are anomaly-free. On the other hand, non-perfect groups generically suffer from anomalies. We present two different ways that allow one to understand these statements.

  14. Anomaly-safe discrete groups

    Directory of Open Access Journals (Sweden)

    Mu-Chun Chen

    2015-07-01

    Full Text Available We show that there is a class of finite groups, the so-called perfect groups, which cannot exhibit anomalies. This implies that all non-Abelian finite simple groups are anomaly-free. On the other hand, non-perfect groups generically suffer from anomalies. We present two different ways that allow one to understand these statements.

  15. Craniofacial anomalies in twins.

    Science.gov (United States)

    Keusch, C F; Mulliken, J B; Kaplan, L C

    1991-01-01

    Studies of twins provide insight into the relative contribution of genetic and environmental factors in the causality of structural anomalies. Thirty-five affected twin pairs were identified from a group of 1114 patients with congenital craniofacial deformities evaluated from 1972 to 1989. Forty-three of these 70 twins exhibited one or more craniofacial anomalies; these were analyzed for dysmorphic characteristics, zygosity, concordance, and family history. The anomalies were categorized into two groups: malformations and deformations. The malformations (n = 36) included hemifacial microsomia (n = 10), cleft lip and palate (n = 8), cleft palate (n = 4), rare facial cleft (n = 2), craniosynostosis (n = 2), Binder syndrome (n = 2), Treacher Collins syndrome (n = 2), craniopagus (n = 2), CHARGE association (n = 1), frontonasal dysplasia (n = 2), and constricted ears (n = 1). The deformations (n = 7) included plagiocephaly (n = 5), hemifacial hypoplasia (n = 1), and micrognathia (n = 1). Twenty-one monozygotic and 14 dizygotic twin pairs were identified. The concordance rate was 33 percent for monozygotic twins and 7 percent for dizygotic twins.(ABSTRACT TRUNCATED AT 250 WORDS)

  16. Detecting Patterns of Anomalies

    Science.gov (United States)

    2009-03-01

    detect anomalies in the dataset is used in [Leung and Leckie, 2005] and [Eskin et al., 2002]. One-class SVMs [Li et al., 2003, Heller et al., 2003] and...IEE Proceedings F, 140(2): 107–113, 1993. J.D.F. Habbema, J. Hermans , and K. Vandenbroek. A stepwise discriminant analysis pro- gram using density...Technometrics, 29(4):409–412, 1987. K.A. Heller , K.M. Svore, A. Keromytis, and S.J. Stolfo. One class support vector machines for detecting anomalous

  17. Chiral supergravity and anomalies

    CERN Document Server

    Mielke, E W; Macias, Alfredo; Mielke, Eckehard W.

    1999-01-01

    Similarily as in the Ashtekar approach, the translational Chern-Simons term is, as a generating function, instrumental for a chiral reformulation of simple (N=1) supergravity. After applying the algebraic Cartan relation between spin and torsion, the resulting canonical transformation induces not only decomposition of the gravitational fields into selfdual and antiselfdual modes, but also a splitting of the Rarita-Schwinger fields into their chiral parts in a natural way. In some detail, we also analyze the consequences for axial and chiral anomalies.

  18. Low Risk Anomalies?

    DEFF Research Database (Denmark)

    Schneider, Paul; Wagner, Christian; Zechner, Josef

    This paper shows theoretically and empirically that beta- and volatility-based low risk anomalies are driven by return skewness. The empirical patterns concisely match the predictions of our model that endogenizes the role of skewness for stock returns through default risk. With increasing downside...... of betting against beta/volatility among low skew firms compared to high skew firms is economically large. Our results suggest that the returns to betting against beta or volatility do not necessarily pose asset pricing puzzles but rather that such strategies collect premia that compensate for skew risk...

  19. Detecting Biosphere anomalies hotspots

    Science.gov (United States)

    Guanche-Garcia, Yanira; Mahecha, Miguel; Flach, Milan; Denzler, Joachim

    2017-04-01

    The current amount of satellite remote sensing measurements available allow for applying data-driven methods to investigate environmental processes. The detection of anomalies or abnormal events is crucial to monitor the Earth system and to analyze their impacts on ecosystems and society. By means of a combination of statistical methods, this study proposes an intuitive and efficient methodology to detect those areas that present hotspots of anomalies, i.e. higher levels of abnormal or extreme events or more severe phases during our historical records. Biosphere variables from a preliminary version of the Earth System Data Cube developed within the CAB-LAB project (http://earthsystemdatacube.net/) have been used in this study. This database comprises several atmosphere and biosphere variables expanding 11 years (2001-2011) with 8-day of temporal resolution and 0.25° of global spatial resolution. In this study, we have used 10 variables that measure the biosphere. The methodology applied to detect abnormal events follows the intuitive idea that anomalies are assumed to be time steps that are not well represented by a previously estimated statistical model [1].We combine the use of Autoregressive Moving Average (ARMA) models with a distance metric like Mahalanobis distance to detect abnormal events in multiple biosphere variables. In a first step we pre-treat the variables by removing the seasonality and normalizing them locally (μ=0,σ=1). Additionally we have regionalized the area of study into subregions of similar climate conditions, by using the Köppen climate classification. For each climate region and variable we have selected the best ARMA parameters by means of a Bayesian Criteria. Then we have obtained the residuals by comparing the fitted models with the original data. To detect the extreme residuals from the 10 variables, we have computed the Mahalanobis distance to the data's mean (Hotelling's T^2), which considers the covariance matrix of the joint

  20. When do anomalies begin?

    Science.gov (United States)

    Lightman, Alan; Gingerich, Owen

    1992-02-01

    The present historical and methodological consideration of scientific anomalies notes that some of these are recognized as such, after long neglect, only after the emergence of compelling explanations for their presence in the given theory in view of an alternative conceptual framework. These cases of 'retrorecognition' are indicative not merely of a significant characteristic of the process of conceptual development and scientific discovery, but of the bases for such process in human psychology. Attention is given to the illustrative cases of the 'flatness problem' in big bang theory, the perigee-opposition problem in Ptolemaic astronomy, the continental-fit problem in geology, and the equality of inertial and gravitational mass.

  1. The diphoton anomaly

    Science.gov (United States)

    Nardecchia, M.

    2017-07-01

    In December 2015, the ATLAS and CMS Collaborations presented results from data taken at the LHC with pp collisions at the center-of-mass energy of √{s} = 13{ TeV} . In the search for resonances decaying into two photons, both experiments observed a tantalising excess of events at an invariant mass of the photon pair of 750GeV. In this contribution, I will summarise some of the main phenomenological and theoretical aspects of this anomaly in terms of New Physics.

  2. Urinary System anomalies at birth

    Directory of Open Access Journals (Sweden)

    Sharada B. Menasinkai

    2015-06-01

    Full Text Available Background: Congenital anomalies of urinary system are common and are found in 3-4% of population, and lethal urinary anomalies account for 10% of termination of pregnancy. Methods: A study was done to know the incidence of congenital anomalies at birth for the period of 4 months from May 99 - Sept 99 at Cheluvamba hospital attached to Mysore medical college. Congenital anomalies in the still births, live births and aborted fetuses >20 weeks were studied along with the case history and ultrasound reports. Aborted fetuses and still born babies were collected for autopsy after the consent of parents. These babies were fixed in 10% formalin and autopsy was done after fixing, and anomalies were noted. Results: Total births during study period were 3000. There were 61 babies with congenital anomalies and 6 babies had anomalies of urinary system. Among the urinary system anomalies 1 baby had bilateral renal agenesis, 1 baby had unilateral renal agenesis with anophthalmia (Fraser syndrome, 2 babies had Multicystic dysplastic kidney disease (MCDK and 1 live baby had hydronephrosis due to obstruction at pelvi ureteric junction, and 1 live female baby had polycystic kidneys. Conclusion: Incidence of urinary system anomalies in the present study was 2 per 1000 births. U/S detection of urinary anomalies varies with period of gestation, amniotic fluid volume and visualisation of urinary bladder. Autopsy helps to detect renal agenesis. [Int J Res Med Sci 2015; 3(3.000: 743-748

  3. Quivers via anomaly chains

    Energy Technology Data Exchange (ETDEWEB)

    Casero, Roberto [Dipartimento di Fisica, Universita di Milano-Bicocca, Piazza della Scienza, 3, 20126 Milan (Italy)]. E-mail: roberto.casero@mib.infn.it; Trincherini, Enrico [Dipartimento di Fisica, Universita di Milano-Bicocca, Piazza della Scienza, 3, 20126 Milan (Italy)

    2003-09-01

    We study quivers in the context of matrix models. We introduce chains of generalized Konishi anomalies to write the quadratic and cubic equations that constrain the resolvents of general affine A-circumflex{sub n-1} and non-affine A{sub n} quiver gauge theories, and give a procedure to calculate all higher-order relations. For these theories we also evaluate, as functions of the resolvents, VEV's of chiral operators with two and four bi-fundamental insertions. As an example of the general procedure we explicitly consider the two simplest quivers A{sub 2} and A-circumflex{sub 1}, obtaining in the first case a cubic algebraic curve, and for the affine theory the same equation as that of U(N) theories with adjoint matter, successfully reproducing the RG cascade result. (author)

  4. Quivers via anomaly chains

    CERN Document Server

    Casero, R; Casero, Roberto; Trincherini, Enrico

    2003-01-01

    We study quivers in the context of matrix models. We introduce chains of generalized Konishi anomalies to write the quadratic and cubic equations that constrain the resolvents of general affine and non-affine quiver gauge theories, and give a procedure to calculate all higher-order relations. For these theories we also evaluate, as functions of the resolvents, VEV's of chiral operators with two and four bifundamental insertions. As an example of the general procedure we explicitly consider the two simplest quivers A2 and A1(affine), obtaining in the first case a cubic algebraic curve, and for the affine theory the same equation as that of U(N) theories with adjoint matter, successfully reproducing the RG cascade result.

  5. Low Risk Anomalies?

    DEFF Research Database (Denmark)

    Schneider, Paul; Wagner, Christian; Zechner, Josef

    risk, the standard capital asset pricing model (CAPM) increasingly overestimates expected equity returns relative to firms' true (skew-adjusted) market risk. Empirically, the profitability of betting against beta/volatility increases with firms' downside risk, and the risk-adjusted return differential...... of betting against beta/volatility among low skew firms compared to high skew firms is economically large. Our results suggest that the returns to betting against beta or volatility do not necessarily pose asset pricing puzzles but rather that such strategies collect premia that compensate for skew risk......This paper shows theoretically and empirically that beta- and volatility-based low risk anomalies are driven by return skewness. The empirical patterns concisely match the predictions of our model that endogenizes the role of skewness for stock returns through default risk. With increasing downside...

  6. Cubic anomalies in WMAP

    CERN Document Server

    Land, K; Land, Kate; Magueijo, Joao

    2004-01-01

    We perform a frequentist analysis of the bispectrum of WMAP first year data. We find clear signal domination up to l=200, with overall consistency with Gaussianity except for the following features. There is a flat patch (i.e. a low chi-squared region) in the same-l components of the bispectrum spanning the range l=32-62; this may be interpreted as ruling out Gaussianity at the 99.6% confidence level. There is also an asymmetry between the North and South inter-l bispectrum components at the 99% confidence level. The preferred asymmetry axis correlates well with the (l,b)=(57,10) direction quoted in the literature for asymmetries in the power spectrum and three-point correlation function. However our analysis of the quadrupole (its bispectrum and principal axes) fail to make contact with previously claimed anomalies.

  7. Algebraic study of chiral anomalies

    Indian Academy of Sciences (India)

    Juan Mañes; Raymond Stora; Bruno Zumino

    2012-06-01

    The algebraic structure of chiral anomalies is made globally valid on non-trivial bundles by the introduction of a fixed background connection. Some of the techniques used in the study of the anomaly are improved or generalized, including a systematic way of generating towers of ‘descent equations’.

  8. Anomaly mediation deformed by axion

    Energy Technology Data Exchange (ETDEWEB)

    Nakayama, Kazunori, E-mail: kazunori@hep-th.phys.s.u-tokyo.ac.jp [Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan); Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa 277-8583 (Japan); Yanagida, Tsutomu T. [Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa 277-8583 (Japan)

    2013-05-13

    We show that in supersymmetric axion models the axion supermultiplet obtains a sizable F-term due to a non-supersymmetric dynamics and it generally gives the gaugino masses comparable to the anomaly mediation contribution. Thus the gaugino mass relation predicted by the anomaly mediation effect can be significantly modified in the presence of axion to solve the strong CP problem.

  9. What is a Timing Anomaly?

    DEFF Research Database (Denmark)

    Cassez, Franck; Hansen, Rene Rydhof; Olesen, Mads Chr.

    2012-01-01

    Timing anomalies make worst-case execution time analysis much harder, because the analysis will have to consider all local choices. It has been widely recognised that certain hardware features are timing anomalous, while others are not. However, defining formally what a timing anomaly is, has bee...

  10. Seismic data fusion anomaly detection

    Science.gov (United States)

    Harrity, Kyle; Blasch, Erik; Alford, Mark; Ezekiel, Soundararajan; Ferris, David

    2014-06-01

    Detecting anomalies in non-stationary signals has valuable applications in many fields including medicine and meteorology. These include uses such as identifying possible heart conditions from an Electrocardiography (ECG) signals or predicting earthquakes via seismographic data. Over the many choices of anomaly detection algorithms, it is important to compare possible methods. In this paper, we examine and compare two approaches to anomaly detection and see how data fusion methods may improve performance. The first approach involves using an artificial neural network (ANN) to detect anomalies in a wavelet de-noised signal. The other method uses a perspective neural network (PNN) to analyze an arbitrary number of "perspectives" or transformations of the observed signal for anomalies. Possible perspectives may include wavelet de-noising, Fourier transform, peak-filtering, etc.. In order to evaluate these techniques via signal fusion metrics, we must apply signal preprocessing techniques such as de-noising methods to the original signal and then use a neural network to find anomalies in the generated signal. From this secondary result it is possible to use data fusion techniques that can be evaluated via existing data fusion metrics for single and multiple perspectives. The result will show which anomaly detection method, according to the metrics, is better suited overall for anomaly detection applications. The method used in this study could be applied to compare other signal processing algorithms.

  11. Anomaly Mediation and Cosmology

    CERN Document Server

    Basboll, A; Jones, D R T

    2011-01-01

    We consider an extension of the MSSM wherein anomaly mediation is the source of supersymmetry-breaking, and the tachyonic slepton problem is solved by a Fayet-Iliopoulos (FI) $D$-term associated with an additional $U(1)$ symmetry, which also facilitates the see-saw mechanism for neutrino masses and a natural source for the Higgs $\\mu$-term. We explore the cosmological consequences of the model, showing that the model naturally produces a period of hybrid inflation, terminating in the production of cosmic strings. In spite of the presence of a $U(1)$ with an FI term, inflation is effected by the $F$-term, with a $D$-flat tree potential (the FI term being cancelled by non-zero squark and slepton fields). Calculating the 1-loop corrections to the inflaton potential, we estimate the constraints on the parameters of the model from Cosmic Microwave Background data. We briefly discuss the mechanisms for baryogenesis via conventional leptogenesis, the out-of-equilibrium production of neutrinos from the cosmic strings...

  12. Interior Alaska Bouguer Gravity Anomaly

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — A 1 kilometer Complete Bouguer Anomaly gravity grid of interior Alaska. Only those grid cells within 10 kilometers of a gravity data point have gravity values....

  13. Interior Alaska Bouguer Gravity Anomaly

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — A 1 kilometer Complete Bouguer Anomaly gravity grid of interior Alaska. All grid cells within the rectangular data area (from 61 to 66 degrees North latitude and...

  14. ALP hints from cooling anomalies

    CERN Document Server

    Giannotti, Maurizio

    2015-01-01

    We review the current status of the anomalies in stellar cooling and argue that, among the new physics candidates, an axion-like particle would represent the best option to account for the hinted additional cooling.

  15. Notes on Anomaly Induced Transport

    CERN Document Server

    Landsteiner, Karl

    2016-01-01

    Chiral anomalies give rise to dissipationless transport phenomena such as the chiral magnetic and vortical effects. In these notes I review the theory from a quantum field theoretic, hydrodynamic and holographic perspective. A physical interpretation of the otherwise somewhat obscure concepts of consistent and covariant anomalies will be given. Vanishing of the CME in strict equilibrium will be connected to the boundary conditions in momentum space imposed by the regularization. The role of the gravitational anomaly will be explained. That it contributes to transport in an unexpectedly low order in the derivative expansion can be easiest understood via holography. Anomalous transport is supposed to play also a key role in understanding the electronics of advanced materials, the Dirac- and Weyl (semi)metals. Anomaly related phenomena such as negative magnetoresistivity, anomalous Hall effect, thermal anomalous Hall effect and Fermi arcs can be understood via anomalous transport. Finally I briefly review a holo...

  16. Renormalization group flows and anomalies

    CERN Document Server

    Komargodski, Zohar

    2015-01-01

    This chapter reviews various aspects of renormalization group flows and anomalies. The chapter considers specific Euclidean two-dimensional theories. Namely, the theories are invariant under translations and rotations in the two space directions. Here the chapter studies theories where, if possible, certain equations hold in fact also at coincident points. In other words, the chapter looks at theories where there is no local gravitational anomaly.

  17. Situs anomalies on prenatal MRI.

    Science.gov (United States)

    Nemec, Stefan F; Brugger, Peter C; Nemec, Ursula; Bettelheim, Dieter; Kasprian, Gregor; Amann, Gabriele; Rimoin, David L; Graham, John M; Prayer, Daniela

    2012-04-01

    Situs anomalies refer to an abnormal organ arrangement, which may be associated with severe errors of development. Due regard being given to prenatal magnetic resonance imaging (MRI) as an adjunct to ultrasonography (US), this study sought to demonstrate the in utero visualization of situs anomalies on MRI, compared to US. This retrospective study included 12 fetuses with situs anomalies depicted on fetal MRI using prenatal US as a comparison modality. With an MRI standard protocol, the whole fetus was assessed for anomalies, with regard to the position and morphology of the following structures: heart; venous drainage and aorta; stomach and intestines; liver and gallbladder; and the presence and number of spleens. Situs inversus totalis was found in 3/12 fetuses; situs inversus with levocardia in 1/12 fetuses; situs inversus abdominis in 2/12 fetuses; situs ambiguous with polysplenia in 3/12 fetuses, and with asplenia in 2/12 fetuses; and isolated dextrocardia in 1/12 fetuses. Congenital heart defects (CHDs), vascular anomalies, and intestinal malrotations were the most frequent associated malformations. In 5/12 cases, the US and MRI diagnoses were concordant. Compared to US, in 7/12 cases, additional MRI findings specified the situs anomaly, but CHDs were only partially visualized in six cases. Our initial MRI results demonstrate the visualization of situs anomalies and associated malformations in utero, which may provide important information for perinatal management. Using a standard protocol, MRI may identify additional findings, compared to US, which confirm and specify the situs anomaly, but, with limited MRI visualization of fetal CHDs. Copyright © 2011 Elsevier Ireland Ltd. All rights reserved.

  18. Anomaly detection on cup anemometers

    Science.gov (United States)

    Vega, Enrique; Pindado, Santiago; Martínez, Alejandro; Meseguer, Encarnación; García, Luis

    2014-12-01

    The performances of two rotor-damaged commercial anemometers (Vector Instruments A100 LK) were studied. The calibration results (i.e. the transfer function) were very linear, the aerodynamic behavior being more efficient than the one shown by both anemometers equipped with undamaged rotors. No detection of the anomaly (the rotors’ damage) was possible based on the calibration results. However, the Fourier analysis clearly revealed this anomaly.

  19. Space weather and space anomalies

    Directory of Open Access Journals (Sweden)

    L. I. Dorman

    2005-11-01

    Full Text Available A large database of anomalies, registered by 220 satellites in different orbits over the period 1971-1994 has been compiled. For the first time, data from 49 Russian Kosmos satellites have been included in a statistical analysis. The database also contains a large set of daily and hourly space weather parameters. A series of statistical analyses made it possible to quantify, for different satellite orbits, space weather conditions on the days characterized by anomaly occurrences. In particular, very intense fluxes (>1000 pfu at energy >10 MeV of solar protons are linked to anomalies registered by satellites in high-altitude (>15000 km, near-polar (inclination >55° orbits typical for navigation satellites, such as those used in the GPS network, NAVSTAR, etc. (the rate of anomalies increases by a factor ~20, and to a much smaller extent to anomalies in geostationary orbits, (they increase by a factor ~4. Direct and indirect connections between anomaly occurrence and geomagnetic perturbations are also discussed.

  20. Coronary Artery Anomalies in Animals

    Directory of Open Access Journals (Sweden)

    Brian A. Scansen

    2017-04-01

    Full Text Available Coronary artery anomalies represent a disease spectrum from incidental to life-threatening. Anomalies of coronary artery origin and course are well-recognized in human medicine, but have received limited attention in veterinary medicine. Coronary artery anomalies are best described in the dog, hamster, and cow though reports also exist in the horse and pig. The most well-known anomaly in veterinary medicine is anomalous coronary artery origin with a prepulmonary course in dogs, which limits treatment of pulmonary valve stenosis. A categorization scheme for coronary artery anomalies in animals is suggested, dividing these anomalies into those of major or minor clinical significance. A review of coronary artery development, anatomy, and reported anomalies in domesticated species is provided and four novel canine examples of anomalous coronary artery origin are described: an English bulldog with single left coronary ostium and a retroaortic right coronary artery; an English bulldog with single right coronary ostium and transseptal left coronary artery; an English bulldog with single right coronary ostium and absent left coronary artery with a prepulmonary paraconal interventricular branch and an interarterial circumflex branch; and a mixed-breed dog with tetralogy of Fallot and anomalous origin of all coronary branches from the brachiocephalic trunk. Coronary arterial fistulae are also described including a coronary cameral fistula in a llama cria and an English bulldog with coronary artery aneurysm and anomalous shunting vessels from the right coronary artery to the pulmonary trunk. These examples are provided with the intent to raise awareness and improve understanding of such defects.

  1. Shortening Anomalies in Supersymmetric Theories

    CERN Document Server

    Gomis, Jaume; Ooguri, Hirosi; Seiberg, Nathan; Wang, Yifan

    2016-01-01

    We present new anomalies in two-dimensional ${\\mathcal N} =(2, 2)$ superconformal theories. They obstruct the shortening conditions of chiral and twisted chiral multiplets at coincident points. This implies that marginal couplings cannot be promoted to background super-fields in short representations. Therefore, standard results that follow from ${\\mathcal N} =(2, 2)$ spurion analysis are invalidated. These anomalies appear only if supersymmetry is enhanced beyond ${\\mathcal N} =(2, 2)$. These anomalies explain why the conformal manifolds of the K3 and $T^4$ sigma models are not K\\"ahler and do not factorize into chiral and twisted chiral moduli spaces and why there are no ${\\mathcal N} =(2, 2)$ gauged linear sigma models that cover these conformal manifolds. We also present these results from the point of view of the Riemann curvature of conformal manifolds.

  2. Boundary terms of conformal anomaly

    Directory of Open Access Journals (Sweden)

    Sergey N. Solodukhin

    2016-01-01

    Full Text Available We analyze the structure of the boundary terms in the conformal anomaly integrated over a manifold with boundaries. We suggest that the anomalies of type B, polynomial in the Weyl tensor, are accompanied with the respective boundary terms of the Gibbons–Hawking type. Their form is dictated by the requirement that they produce a variation which compensates the normal derivatives of the metric variation on the boundary in order to have a well-defined variational procedure. This suggestion agrees with recent findings in four dimensions for free fields of various spins. We generalize this consideration to six dimensions and derive explicitly the respective boundary terms. We point out that the integrated conformal anomaly in odd dimensions is non-vanishing due to the boundary terms. These terms are specified in three and five dimensions.

  3. Multiple Visceral and Peritoneal Anomalies

    Directory of Open Access Journals (Sweden)

    Gayathri Prabhu S

    2016-07-01

    Full Text Available Visceral and peritoneal anomalies are frequently encountered during cadaveric dissections and surgical procedures of abdomen. A thorough knowledge of the same is required for the success of diagnostic, surgical and radiological procedures of abdomen. We report multiple peritoneal and visceral anomalies noted during dissection classes for medical undergraduates. The anomalies were found in an adult male cadaver aged approximately 70 years. The right iliac fossa was empty due to the sub-hepatic position of caecum and appendix. The sigmoid colon formed an inverted “U” shaped loop above the sacral promontory in the median position. It entered the pelvis from the right side and descended along the lateral wall of the pelvis. The sigmoid mesocolon was attached obliquely to the posterior abdominal wall, just above the sacral promontory. Further there was a cysto-colic fold of peritoneum extending from the right colic flexure. We discuss the clinical significance of the variations.

  4. Electromagnetic Duality and Entanglement Anomalies

    CERN Document Server

    Donnelly, William; Wall, Aron

    2016-01-01

    Duality is an indispensable tool for describing the strong-coupling dynamics of gauge theories. However, its actual realization is often quite subtle: quantities such as the partition function can transform covariantly, with degrees of freedom rearranged in a nonlocal fashion. We study this phenomenon in the context of the electromagnetic duality of abelian $p$-forms. A careful calculation of the duality anomaly on an arbitrary $D$-dimensional manifold shows that the effective actions agree exactly in odd $D$, while in even $D$ they differ by a term proportional to the Euler number. Despite this anomaly, the trace of the stress tensor agrees between the dual theories. We also compute the change in the vacuum entanglement entropy under duality, relating this entanglement anomaly to the duality of an "edge mode" theory in two fewer dimensions. Previous work on this subject has led to conflicting results; we explain and resolve these discrepancies.

  5. Conformal Anomalies and Gravitational Waves

    CERN Document Server

    Meissner, Krzysztof A

    2016-01-01

    We argue that the presence of conformal anomalies in gravitational theories can lead to observable modifications to Einstein's equations via the induced anomalous effective actions, whose non-localities can overwhelm the smallness of the Planck scale. The fact that no such effects have been seen in recent cosmological or gravitational wave observations therefore imposes strong restrictions on the field content of possible extensions of Einstein's theory: all viable theories should have vanishing conformal anomalies. We then show that, among presently known theories, a complete cancellation of conformal anomalies in $D=4$ for both the $C^2$ invariant and the Euler (Gauss-Bonnet) invariant $E_4$ can only be achieved for $N$-extended supergravities with $N\\geq 5$, as well as for M theory compactified to four dimensions.

  6. Boundary terms of conformal anomaly

    Energy Technology Data Exchange (ETDEWEB)

    Solodukhin, Sergey N., E-mail: Sergey.Solodukhin@lmpt.univ-tours.fr

    2016-01-10

    We analyze the structure of the boundary terms in the conformal anomaly integrated over a manifold with boundaries. We suggest that the anomalies of type B, polynomial in the Weyl tensor, are accompanied with the respective boundary terms of the Gibbons–Hawking type. Their form is dictated by the requirement that they produce a variation which compensates the normal derivatives of the metric variation on the boundary in order to have a well-defined variational procedure. This suggestion agrees with recent findings in four dimensions for free fields of various spins. We generalize this consideration to six dimensions and derive explicitly the respective boundary terms. We point out that the integrated conformal anomaly in odd dimensions is non-vanishing due to the boundary terms. These terms are specified in three and five dimensions.

  7. Boundary Anomalies and Correlation Functions

    CERN Document Server

    Huang, Kuo-Wei

    2016-01-01

    It was shown recently that boundary terms of conformal anomalies recover the universal contribution to the entanglement entropy and also play an important role in the boundary monotonicity theorem of odd-dimensional quantum field theories. Motivated by these results, we investigate relationships between boundary anomalies and the stress tensor correlation functions in conformal field theories. In particular, we focus on how the conformal Ward identity and the renormalization group equation are modified by boundary central charges. Renormalized stress tensors induced by boundary Weyl invariants are also discussed, with examples in spherical and cylindrical geometries.

  8. Global gravitational anomalies and transport

    Science.gov (United States)

    Chowdhury, Subham Dutta; David, Justin R.

    2016-12-01

    We investigate the constraints imposed by global gravitational anomalies on parity odd induced transport coefficients in even dimensions for theories with chiral fermions, gravitinos and self dual tensors. The η-invariant for the large diffeomorphism corresponding to the T transformation on a torus constraints the coefficients in the thermal effective action up to mod 2. We show that the result obtained for the parity odd transport for gravitinos using global anomaly matching is consistent with the direct perturbative calculation. In d = 6 we see that the second Pontryagin class in the anomaly polynomial does not contribute to the η-invariant which provides a topological explanation of this observation in the `replacement rule'. We then perform a direct perturbative calculation for the contribution of the self dual tensor in d = 6 to the parity odd transport coefficient using the Feynman rules proposed by Gaumé and Witten. The result for the transport coefficient agrees with that obtained using matching of global anomalies.

  9. Anomalies and noncommutative index theory

    CERN Document Server

    Perrot, D

    2006-01-01

    These are the notes of a lecture given during the summer school "Geometric and Topological Methods for Quantum Field Theory", Villa de Leyva, Colombia, july 11 - 29, 2005. We review basic facts concerning gauge anomalies and discuss the link with the Connes-Moscovici index formula in noncommutative geometry.

  10. Bony anomaly of Meckel's cave.

    Science.gov (United States)

    Tubbs, R Shane; Salter, E George; Oakes, W Jerry

    2006-01-01

    This study describes the seemingly rare occurrence of bone formation within the proximal superior aspect of Meckel's cave thus forming a bony foramen for the proximal trigeminal nerve to traverse. The anatomy of Meckel's cave is reviewed and the clinical potential for nerve compression from this bony anomaly discussed.

  11. Conformal anomalies and gravitational waves

    Science.gov (United States)

    Meissner, Krzysztof A.; Nicolai, Hermann

    2017-09-01

    We argue that the presence of conformal anomalies in gravitational theories can lead to observable modifications to Einstein's equations via the induced anomalous effective actions, whose non-localities can overwhelm the smallness of the Planck scale. The fact that no such effects have been seen in recent cosmological or gravitational wave observations therefore imposes strong restrictions on the field content of possible extensions of Einstein's theory: all viable theories should have vanishing conformal anomalies. We then show that a complete cancellation of conformal anomalies in D = 4 for both the C2 invariant and the Euler (Gauss-Bonnet) invariant E4 can only be achieved for N-extended supergravity multiplets with N ⩾ 5, as well as for M theory compactified to four dimensions. Although there remain open questions, in particular concerning the true significance of conformal anomalies in non-conformal theories, as well as their possible gauge dependence for spin s ⩾3/2, these cancellations suggest a hidden conformal structure of unknown type in these theories.

  12. Connecting Stratospheric and Ionospheric Anomalies

    Science.gov (United States)

    Spraggs, M. E.; Goncharenko, L. P.; Zhang, S.; Coster, A. J.; Benkevitch, L. V.

    2014-12-01

    This study investigates any relationship between lunar phases and ionospheric anomalies that appear at low latitudes concurrently with sudden stratospheric warmings (SSWs). The study utilizes World-wide GPS Receiver Network Total Electron Content (TEC) data spanning 13 years (2001-2014) and focuses on the changes in the equatorial ionization anomaly the Western hemisphere. TEC is highly variable due to the influences of solar flux, geomagnetic activity, and seasonal variation and these influences are removed by the use of model. This empirical TEC model is a combination of linear dependencies of solar flux (F10.7) and geomagnetic activity (Ap3) with a third degree polynomial dependency for day-of-year (DOY). With such dependencies removed, the remaining TEC variation could be resolved and attributed to an appropriate mechanism. Lunar phase and apside was investigated in particular, especially the new and full moon phases during perigees when tidal forcing would be most powerful. Lunar tidal forcing on planetary waves is also examined as being physically responsible for setting up conditions that may give rise to SSWs and ionospheric anomalies. Preliminary results suggest that such anomalies may be enhanced in intensity during the full or new moon and even more so during perigee by different amounts depending on whether the SSW is a major (40-60%) or minor (20-45%) event.

  13. Thermal anomalies in stressed Teflon.

    Science.gov (United States)

    Lee, S. H.; Wulff, C. A.

    1972-01-01

    In the course of testing polytetrafluoroethylene (Teflon) as a calorimetric gasketing material, serendipity revealed a thermal anomaly in stressed film that occurs concomitantly with the well-documented 25 C transition. The magnitude of the excess energy absorption - about 35 cal/g - is suggested to be related to the restricted thermal expansion of the film.

  14. Anomaly detection in online social networks

    CERN Document Server

    Savage, David; Yu, Xinghuo; Chou, Pauline; Wang, Qingmai

    2016-01-01

    Anomalies in online social networks can signify irregular, and often illegal behaviour. Anomalies in online social networks can signify irregular, and often illegal behaviour. Detection of such anomalies has been used to identify malicious individuals, including spammers, sexual predators, and online fraudsters. In this paper we survey existing computational techniques for detecting anomalies in online social networks. We characterise anomalies as being either static or dynamic, and as being labelled or unlabelled, and survey methods for detecting these different types of anomalies. We suggest that the detection of anomalies in online social networks is composed of two sub-processes; the selection and calculation of network features, and the classification of observations from this feature space. In addition, this paper provides an overview of the types of problems that anomaly detection can address and identifies key areas of future research.

  15. Focal skin defect, limb anomalies and microphthalmia.

    NARCIS (Netherlands)

    Jackson, K.E.; Andersson, H.C.

    2004-01-01

    We describe two unrelated female patients with congenital single focal skin defects, unilateral microphthalmia and limb anomalies. Growth and psychomotor development were normal and no brain malformation was detected. Although eye and limb anomalies are commonly associated, clinical anophthalmia and

  16. Prevalence of dental anomalies in orthodontic patients.

    Science.gov (United States)

    Thongudomporn, U; Freer, T J

    1998-12-01

    The prevalence of dental anomalies including agenesis, crown shape, tooth position, root shape, and invagination were examined in 111 orthodontic patients; 74.77 per cent of the patients exhibited at least one dental anomaly. Invagination was found to be the most prevalent anomaly, whereas supernumerary teeth and root dilaceration were the least frequent anomalies. Dental invagination and short or blunt roots were significantly more prevalent in females than in males. Implications for orthodontic treatment planning are discussed.

  17. [Ectopia cordis and cardiac anomalies].

    Science.gov (United States)

    Cabrera, Alberto; Rodrigo, David; Luis, María Teresa; Pastor, Esteban; Galdeano, José Miguel; Esteban, Susana

    2002-11-01

    Ectopia cordis is a rare disease that occurs in 5.5 to 7.9 per million live births. Only 267 cases had been reported as of 2001, most (95%) associated with other cardiac anomalies. We studied the cardiac malformations associated in 6 patients with ectopia cordis. Depending on where the defect was located, the cases of ectopia were classified into four groups: cervical, thoracic, thoraco-abdominal, and abdominal. All 6 patients died before the third day of life, 4 during delivery. Three of the patients were included in the thoracic group, whereas the other 3 belonged to the thoraco-abdominal group. All the patients had associated ventricular septal defects, 3 double-outlet right ventricle (50%) and the rest (50%) tetralogy of Fallot-pulmonary atresia. Two patients with double-outlet right ventricle presented mitral-valve pathology, a parachute valve and an atresic mitral valve. None of these cardiac anomalies have been reported to date.

  18. On Anomaly Mediated SUSY Breaking

    CERN Document Server

    de Alwis, S P

    2008-01-01

    A discrepancy between the Anomaly Mediated Supersymmetry Breaking (AMSB) gaugino mass calculated from the work of Kaplunovsky and Louis (hep-th/9402005) (KL) and other calculations in the literature is explained, and it is argued that the KL expression is the correct one relevant to the Wilsonian action. Furthermore it is argued that the AMSB contribution to the squark and slepton masses should be replaced by the contribution pointed out by Dine and Seiberg (DS) which has nothing to do with Weyl anomalies. This is not in general equivalent to the AMSB expression, and it is shown that there are models in which the usual AMSB expression would vanish but the DS one is non-zero. In fact the latter has aspects of both AMSB and gauge mediated SUSY breaking. In particular like the latter, it gives positive squared masses for sleptons.

  19. Survey of Anomaly Detection Methods

    Energy Technology Data Exchange (ETDEWEB)

    Ng, B

    2006-10-12

    This survey defines the problem of anomaly detection and provides an overview of existing methods. The methods are categorized into two general classes: generative and discriminative. A generative approach involves building a model that represents the joint distribution of the input features and the output labels of system behavior (e.g., normal or anomalous) then applies the model to formulate a decision rule for detecting anomalies. On the other hand, a discriminative approach aims directly to find the decision rule, with the smallest error rate, that distinguishes between normal and anomalous behavior. For each approach, we will give an overview of popular techniques and provide references to state-of-the-art applications.

  20. Theory of Geological Anomaly in Remote Sensing

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Geological anomaly is geological body or complex body with obviously different compositions, structures or orders of genesis as compared with those in the surrounding areas. Geological anomaly, restrained by the geological factors closely associated with ore-forming process, is an important clue to ore deposits. The geological anomaly serves as a geological sign to locate ore deposits. Therefore, it is very important to study how to define the characteristics of geological anomaly and further to locate the changes in these characteristics. In this paper, the authors propose the geological anomaly based on the remote-sensing images and data, and expound systematically such image features as scale, size, boundary, morphology and genesis of geological anomalies. Then the authors introduce the categorization of the geological anomalies according to their geneses. The image characteristics of some types of geological anomalies, such as the underground geological anomaly, are also explained in detail. Based on the remote-sensing interpretation of these geological anomalies, the authors conclude that the forecasting and exploration of ore deposits should be focused on the following three aspects: (1) the analysis of geological setting and geological anomaly; (2) the analysis of circular geological anomaly, and (3) the comprehensive forecasting of ore deposits and the research into multi-source information.

  1. Fetal renal anomalies : diagnosis, management, and outcome

    NARCIS (Netherlands)

    Damen-Elias, Henrica Antonia Maria

    2004-01-01

    In two to three percent of fetuses structural anomalies can be found with prenatal ultrasound investigation. Anomalies of the urinary tract account for 15 to 20% of these anomalies with a detection rate of approximately of 90%. In Chapter 2, 3 and 4 we present reference curves for size and growth of

  2. Fetal renal anomalies : diagnosis, management, and outcome

    NARCIS (Netherlands)

    Damen-Elias, Henrica Antonia Maria

    2004-01-01

    In two to three percent of fetuses structural anomalies can be found with prenatal ultrasound investigation. Anomalies of the urinary tract account for 15 to 20% of these anomalies with a detection rate of approximately of 90%. In Chapter 2, 3 and 4 we present reference curves for size and growth

  3. Bifid rib: A rare anomaly

    Directory of Open Access Journals (Sweden)

    Mythili Krishnan Rathinasabapathi

    2015-01-01

    Full Text Available A case of the bifid rib was found during routine bone study. The distal part of the osseous rib bifurcated into two divisions with an angle of 60°. Both divisions had their own costal cartilage. Bifid rib is a congenital abnormality of the rib cage and usually asymptomatic, often discovered incidentally on chest X-ray. Effects of this neuroskeletal anomaly can include respiratory difficulties and neurological limitations.

  4. Sharing AIS Related Anomalies (SARA)

    Science.gov (United States)

    2016-03-01

    misconfiguration and intentional misuse. These unintended behaviours generate an abundance of anomalies that the security community has an interest in monitoring...Lastly, the feedback loop formed with clients is essential to SARA’s advancement. The more SARA is exposed, the better and faster it can be adapted...to end-user needs and thus be adopted by them. This section is organised as follows : • Section 2.1 describes the strategy used to identify potential

  5. Anomaly mediation in superstring theory

    Energy Technology Data Exchange (ETDEWEB)

    Conlon, J.P. [Rudolf Peierls Center for Theoretical Physics, 1 Keble Road, Oxford, OX1 3NP (United Kingdom); Balliol College, Oxford, OX1 3BJ (United Kingdom); Kavli Institute of Theoretical Physics, Kohn Hall, University of California, Santa Barbara CA 93106-4030 (United States); Goodsell, M. [Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22603 Hamburg (Germany); Palti, E. [Centre de Physique Theorique, Ecole Polytechnique, CNRS, 91128 Palaiseau (France)

    2011-01-15

    We study anomaly mediated supersymmetry breaking in type IIB string theory and use our results to test the supergravity formula for anomaly mediated gaugino masses. We compute 1-loop gaugino masses for models of D3-branes on orbifold singularities with 3-form fluxes by calculating the annulus correlator of 3-form flux and two gauginos in the zero momentum limit. Consistent with supergravity expectations we find both anomalous and running contributions to 1-loop gaugino masses. For background Neveu-Schwarz H-flux we find an exact match with the supergravity formula. For Ramond-Ramond flux there is an off-shell ambiguity that precludes a full matching. The anomaly mediated gaugino masses, while determined by the infrared spectrum, arise from an explicit sum over UV open string winding modes. We also calculate brane-to-brane tree-level gravity mediated gaugino masses and show that there are two contributions coming from the dilaton and from the twisted modes, which are suppressed by the full T{sup 6} volume and the untwisted T{sup 2} volume respectively. (Copyright copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  6. Anomaly mediation in superstring theory

    Energy Technology Data Exchange (ETDEWEB)

    Conlon, Joseph P. [Rudolf Peierls Center for Theoretical Physics, Oxford (United Kingdom); Balliol College, Oxford (United Kingdom); Goodsell, Mark [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Palti, Eran [Centre de Physique Theoretique, Ecole Polytechnique, CNRS, Palaiseau (France)

    2010-08-15

    We study anomaly mediated supersymmetry breaking in type IIB string theory and use our results to test the supergravity formula for anomaly mediated gaugino masses. We compute 1-loop gaugino masses for models of D3-branes on orbifold singularities with 3-form fluxes by calculating the annulus correlator of 3-form flux and two gauginos in the zero momentum limit. Consistent with supergravity expectations we find both anomalous and running contributions to 1-loop gaugino masses. For background Neveu-Schwarz H-flux we find an exact match with the supergravity formula. For Ramond-Ramond flux there is an off-shell ambiguity that precludes a full matching. The anomaly mediated gaugino masses, while determined by the infrared spectrum, arise from an explicit sum over UV open string winding modes. We also calculate brane-to-brane tree-level gravity mediated gaugino masses and show that there are two contributions coming from the dilaton and from the twisted modes, which are suppressed by the full T{sup 6} volume and the untwisted T{sup 2} volume respectively. (orig.)

  7. Columbus Payloads Flow Rate Anomalies

    Science.gov (United States)

    Quaranta, Albino; Bufano, Gaetana; DePalo, Savino; Holt, James M.; Szigetvari, Zoltan; Palumberi, Sergio; Hinderer, S.

    2011-01-01

    The Columbus Active Thermal Control System (ATCS) is the main thermal bus for the pressurized racks working inside the European laboratory. One of the ATCS goals is to provide proper water flow rate to each payload (P/L) by controlling actively the pressure drop across the common plenum distribution piping. Overall flow measurement performed by the Water Pump Assembly (WPA) is the only flow rate monitor available at system level and is not part of the feedback control system. At rack activation the flow rate provided by the system is derived on ground by computing the WPA flow increase. With this approach, several anomalies were raised during these 3 years on-orbit, with the indication of low flow rate conditions on the European racks FSL, BioLab, EDR and EPM. This paper reviews the system and P/Ls calibration approach, the anomalies occurred, the engineering evaluation on the measurement approach and the accuracy improvements proposed, the on-orbit test under evaluation with NASA and finally discusses possible short and long term solutions in case of anomaly confirmation.

  8. Trace anomalies from quantum mechanics

    CERN Document Server

    Bastianelli, F; Bastianelli, Fiorenzo; Nieuwenhuizen, Peter van

    1993-01-01

    The 1-loop anomalies of a d-dimensional quantum field theory can be computed by evaluating the trace of the regulated path integral jacobian matrix, as shown by Fujikawa. In 1983, Alvarez-Gaum\\'e and Witten observed that one can simplify this evaluation by replacing the operators which appear in the regulator and in the jacobian by quantum mechanical operators with the same (anti)commutation relations. By rewriting this quantum mechanical trace as a path integral with periodic boundary conditions for a one-dimensional supersymmetric nonlinear sigma model, they obtained the chiral anomalies for spin 1/2 and 3/2 fields and selfdual antisymmetric tensors in d dimensions. In this article, we treat the case of trace anomalies for spin 0, 1/2 and 1 fields in a gravitational and Yang-Mills background. We do not introduce a supersymmetric sigma model, but keep the original Dirac matrices $\\g^\\m$ and internal symmetry generators $T^a$ in the path integral. As a result, we get a matrix-valued action. Gauge covariance o...

  9. Astrometric Solar-System Anomalies

    CERN Document Server

    Anderson, John D

    2009-01-01

    There are at least four unexplained anomalies connected with astrometric data. Perhaps the most disturbing is the fact that when a spacecraft on a flyby trajectory approaches the Earth within 2000 km or less, it often experiences a change in total orbital energy per unit mass. Next, a secular change in the astronomical unit AU is definitely a concern. It is increasing by about 15 cm yr$^{-1}$. The other two anomalies are perhaps less disturbing because of known sources of nongravitational acceleration. The first is an apparent slowing of the two Pioneer spacecraft as they exit the solar system in opposite directions. Some astronomers and physicists are convinced this effect is of concern, but many others are convinced it is produced by a nearly identical thermal emission from both spacecraft, in a direction away from the Sun, thereby producing acceleration toward the Sun. The fourth anomaly is a measured increase in the eccentricity of the Moon's orbit. Here again, an increase is expected from tidal friction ...

  10. Development and Congenital Anomalies of the Pancreas

    Directory of Open Access Journals (Sweden)

    Hiroyuki Tadokoro

    2011-01-01

    Full Text Available Understanding how the pancreas develops is essential to understand the pathogenesis of congenital pancreatic anomalies. Recent studies have shown the advantages of investigating the development of frogs, mice, and chickens for understanding early embryonic development of the pancreas and congenital anomalies, such as choledochal cysts, anomalous pancreaticobiliary junction, annular pancreas, and pancreas divisum. These anomalies arise from failure of complete rotation and fusion during embryogenesis. There are many theories in the etiology of congenital anomalies of the pancreas. We review pancreas development in humans and other vertebrates. In addition, we attempt to clarify how developmental failure is related to congenital pancreatic anomalies.

  11. Global Anomalies and Effective Field Theory

    CERN Document Server

    Golkar, Siavash

    2015-01-01

    We show that matching anomalies under large gauge transformations and large diffeomorphisms can explain the appearance and non-renormalization of couplings in effective field theory. We focus on %thermal partition functions and thermal effective field theory where we argue that the appearance of certain unusual Chern-Simons couplings is a consequence of global anomalies. As an example, we show that a mixed global anomaly in four dimensions fixes the chiral vortical effect coefficient. This is an experimentally measurable prediction from a global anomaly. For certain situations, we propose a simpler method for calculating global anomalies which uses correlation functions rather than eta invariants.

  12. Algorithms for Anomaly Detection - Lecture 2

    CERN Document Server

    CERN. Geneva

    2017-01-01

    The concept of statistical anomalies, or outliers, has fascinated experimentalists since the earliest attempts to interpret data. We want to know why some data points don’t seem to belong with the others: perhaps we want to eliminate spurious or unrepresentative data from our model. Or, the anomalies themselves may be what we are interested in: an outlier could represent the symptom of a disease, an attack on a computer network, a scientific discovery, or even an unfaithful partner. We start with some general considerations, such as the relationship between clustering and anomaly detection, the choice between supervised and unsupervised methods, and the difference between global and local anomalies. Then we will survey the most representative anomaly detection algorithms, highlighting what kind of data each approach is best suited to, and discussing their limitations. We will finish with a discussion of the difficulties of anomaly detection in high-dimensional data and some new directions for anomaly detec...

  13. Algorithms for Anomaly Detection - Lecture 1

    CERN Document Server

    CERN. Geneva

    2017-01-01

    The concept of statistical anomalies, or outliers, has fascinated experimentalists since the earliest attempts to interpret data. We want to know why some data points don’t seem to belong with the others: perhaps we want to eliminate spurious or unrepresentative data from our model. Or, the anomalies themselves may be what we are interested in: an outlier could represent the symptom of a disease, an attack on a computer network, a scientific discovery, or even an unfaithful partner. We start with some general considerations, such as the relationship between clustering and anomaly detection, the choice between supervised and unsupervised methods, and the difference between global and local anomalies. Then we will survey the most representative anomaly detection algorithms, highlighting what kind of data each approach is best suited to, and discussing their limitations. We will finish with a discussion of the difficulties of anomaly detection in high-dimensional data and some new directions for anomaly detec...

  14. Major congenital anomalies in a Danish region

    DEFF Research Database (Denmark)

    Garne, Ester; Hansen, Anne Vinkel; Birkelund, Anne Sofie

    2014-01-01

    congenital anomaly, 13.9% had a chromosomal anomaly and 7.7% were multiple congenital anomalies. The combined foetal and infant mortality in the study area was 11.6 per 1,000 births. 19% (2.2 per 1,000) of these deaths were foetuses and infants with major congenital anomalies. Combined foetal and infant......INTRODUCTION: This study describes the prevalence of congenital anomalies and changes over time in birth outcome, mortality and chronic maternal diseases. MATERIAL AND METHODS: This study was based on population data from the EUROCAT registry covering the Funen County, Denmark, 1995......-2008. The registry covers live births, foetal deaths with a gestational age (GA) of 20 weeks or more, and terminations of pregnancy due to congenital anomalies (TOPFA). RESULTS: The overall prevalence of congenital anomalies was 2.70% (95% confidence interval: 2.58-2.80). The majority of cases had an isolated...

  15. Congenital anomalies in Primorsky region.

    Science.gov (United States)

    Kiku, P; Voronin, S; Golokhvast, K

    2015-01-01

    According to WHO hereditary diseases and congenital malformations contribute significantly to the health of population. Thus, the problems of epidemiology, clinical presentation, diagnosis and treatment of congenital abnormalities are of interest for many researchers [2]. In addition, the dynamic accounting for the incidence of congenital malformations and hereditary diseases allows the researchers to assess the ecological situation in the region [1]. The occurrence of congenital anomalies in the world varies; it depends heavily on how carefully the data is collected [4]. Multifactorial or polygenic diseases develop under the influence of environmental factors in the presence of defective genes. They can constitute up to 90% of all chronic pathology [2-5]. To determine the incidence of congenital anomalies under the influence of environmental factors. The study used the methodology of system evaluation of congenital anomalies incidence in Primorsky region, depending on bio-climatic and environmental conditions. The authors used health statistics for the period from 2000 to 2014, F.12 class for congenital abnormalities in adolescents and children that were compared in geographical and temporal aspects with environmental factors of 33 settlements in Primorsky region. The environment is represented by nature and climate (6 factor modules) and sanitation (7 factor modules) blocks of factors. When formalizing the information database of the environment a specially developed 10-point assessment scale was used. Statistical processing of the information was carried out using Pearson's chi-squared test and multiple regression method from SSPS application program package. The study found that over the 15-year period the level of congenital abnormalities in children increased by 27.5% and in adolescents - by 35.1%, and in 2014 it amounted to 1687.6 and 839.3 per 100 000 people, respectively. The predictive model shows a steady further growth of this pathology. The incidence

  16. Chiral Anomaly in Contorted Spacetimes

    CERN Document Server

    Mielke, E W

    1999-01-01

    The Dirac equation in Riemann-Cartan spacetimes with torsion is reconsidered. As is well-known, only the axial covector torsion $A$, a one-form, couples to massive Dirac fields. Using diagrammatic techniques, we show that besides the familiar Riemannian term only the Pontrjagin type four-form $dA\\wedge dA$ does arise additionally in the chiral anomaly, but not the Nieh-Yan term $d ^* A$, as has been claimed recently. Implications for cosmic strings in Einstein-Cartan theory as well as for Ashtekar's canonical approach to quantum gravity are discussed.

  17. Endocrine disruptors and congenital anomalies

    Directory of Open Access Journals (Sweden)

    Mônica Rittler

    2002-04-01

    Full Text Available The specialized literature was reviewed concerning the suspected increasing secular trends in the frequency of female births, male genital congenital anomalies, abnormal sperm counts, and testicular cancer. Although no risk factors could be identified yet, the observed sex ratio decline during the last decades has been considered to be an effect of certain pollutants on normal hormone activity, and human reproductive development. Reported increasing trends in the frequencies of hypospadias and cryptorchidism are very difficult to be interpreted due to the large variability in the registered frequency of these malformations due to operational as well as biological reasons.

  18. Recognising serious umbilical cord anomalies.

    Science.gov (United States)

    Marshall, Andrew S J; Jayapal, Sathiya S K; Whitburn, Jessica A S; Akinbiyi, Bolutito A; Willetts, Ian E

    2013-11-27

    Umbilical vessel catheterisation is a common intervention in neonatal care. Many complications are recognised, some of which are life-threatening. We report the case of a term neonate who was compromised at birth following antepartum haemorrhage with evidence of multiorgan ischaemic injury. Following resuscitation and umbilical vessel catheterisation, she developed pneumoperitoneum. At laparotomy, a patent vitellointestinal duct was identified and resected. Intestinal perforation was found in the duct wall, most plausibly explained by the unintentional catheterisation of the duct via the umbilicus. Learning to recognise umbilical cord anomalies, such as patent vitellointestinal duct, can be simple and could prevent potentially serious complications.

  19. Hot Flow Anomalies at Venus

    Science.gov (United States)

    Collinson, G. A.; Sibeck, David Gary; Boardsen, Scott A.; Moore, Tom; Barabash, S.; Masters, A.; Shane, N.; Slavin, J.A.; Coates, A.J.; Zhang, T. L.; Sarantos, M.

    2012-01-01

    We present a multi-instrument study of a hot flow anomaly (HFA) observed by the Venus Express spacecraft in the Venusian foreshock, on 22 March 2008, incorporating both Venus Express Magnetometer and Analyzer of Space Plasmas and Energetic Atoms (ASPERA) plasma observations. Centered on an interplanetary magnetic field discontinuity with inward convective motional electric fields on both sides, with a decreased core field strength, ion observations consistent with a flow deflection, and bounded by compressive heated edges, the properties of this event are consistent with those of HFAs observed at other planets within the solar system.

  20. A study of dental anomalies

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Sook; Kim, Jae Duck [Dept. of Oral Radiology, College of Dentistry, Chosun University, Kwangju (Korea, Republic of)

    1993-08-15

    The purpose of this study was to find out the prevalence of dental anomalies in 600 normal persons (male:363, female:237) at age 14 to 39 years, through history taking, oral examination, and radiographic observations of subjects. The obtained results were as follows: 1. The prevalence of individual dental anomalies were as follows; Congenitally missing teeth 7%; supernumerary teeth 1.33%; ectopic eruption 8.50%; transposition 0.33%; rotation 23.67%; microdontia 11.16% (peg lateral is 5.33%; third molar 5.83%); prolonged retention of deciduous teeth 1.33%; crowding 49.83%; and spacing 15.17%. 2. Alterations in numbers of teeth : The most frequently missing teeth were mandibular lateral incisors, followed by mandibular second premolars and maxillary second premolars. In numbers of congenitally missing teeth per person, 52.38% had one missing tooth and 30.95% had two missing teeth. In supernumerary teeth, there was higher rate in male than in female. Most supernumerary teeth were mesiodens of median area in maxilla and the eruption pattern of that teeth generally was unerupted state. 3. In transposition, exchange of position of teeth involved the canine and first premolar. 4. Congenital missing rate of permanent successors in prolonged retention of deciduous teeth was 69.23%. 5. Crowding and spacing had respectively higher rate in mandible and in maxilla.

  1. Multimodality imaging of vascular anomalies.

    Science.gov (United States)

    Restrepo, Ricardo

    2013-03-01

    Vascular malformations and hemangiomas are common in children but remain a source of confusion during diagnosis, in part because of the lack of a uniform terminology. With the existing treatments for hemangiomas and vascular malformations, it is important to make the correct diagnosis initially to prevent adverse physical and emotional sequelae in not only the child but also the family. The diagnosis of vascular malformations is made primarily by the clinician and based on the physical exam. Imaging is carried out using predominantly ultrasound (US) and magnetic resonance imaging (MRI), which are complementary modalities. In most cases of vascular anomalies, US is the first line of imaging as it is readily available, less expensive, lacks ionizing radiation and does not require sedation. MRI is also of great help for further characterizing the lesions. Conventional arteriography is reserved for cases that require therapeutic intervention, more commonly for arteriovenous malformations. Radiographs usually play no role in diagnosing vascular anomalies in children. In this article, the author describes the terminology and types of hemangiomas and vascular malformations and their clinical, histological features, as well as the imaging approach and appearance.

  2. Surgical Treatment Experience of Ebstein Malformation On Infants and Children%婴幼儿三尖瓣下移畸形外科治疗体会

    Institute of Scientific and Technical Information of China (English)

    马新平

    2015-01-01

    Objective:To summarize the surgical treatment and effect of ebstein malformation on infants and chil-dren. Methods:21 patients who were operated on included 12 boys and 9 girls with main age at(2. 5 ± 1. 07)years from 4 months to 4 2/12years,with weight at(8. 21 ± 3. 41)Kg. All of children with preoperative diagnosis by ultrason-ic cardiogram were tricuspid valve malformation with tricuspid valvuloplasty and atrialized ventricular longitudinal fold-ing. in which there were 2 cases with two-way grenn surgery with the treatment of intracardiac consolidation deformation Three pointed leaf down the most in the distance was about 2. 6˜4. 1 cm. Results:There was one hospital death,one died of low cardiac output syndrome. There were complications in 21 cases,3 cases of perioperative period combined su-praventricular tachycardia( SVT),2 cases of premature beat,transientⅢdegree atrioventricular block in 1 case,3 ca-ses of pneumonia,were cured out of the hospital . Follow up was completed in 20patients from 3 months to 4years ,in which there were mild tricuspid regurgitation of 12 cases,light to moderate in 5 cases,1 cases of postoperative 3 years of severe tricuspid regurgitation,the second line of tricuspid valve replacement surgery. Conclusions:The early surgery should be done for infant children with tricuspid malformation ahead of the disc ring progressive expanding secondary pathological changes . Intraoperative eliminating tricuspid regurgitation,maximum function of the right ventricular are the key to successful operation. The tricuspid valvuloplasty and atrialized ventricular longitudinal folding is an ideal surgical method. Maintenance and right ventricular function after surgery for the treatment of arrhythmia is essential for the post-operative treatment.%目的:总结婴幼儿三尖瓣下移畸形的外科治疗及疗效。方法:本组患儿共21例,男12例,女9例,平均年龄(2.5±1.07)岁;平均体重(8.21±3.41)kg。全组患儿

  3. Electromagnetic field anomalies above an isometric depression

    Science.gov (United States)

    Golubtsova, N. S.

    1981-12-01

    The paper examines the three-dimensional simulation of the electromagnetic field above an isometric depression with conducting deposits. The model makes it possible to study the development of electromagnetic anomalies over such a depression and to make qualitative as well as quantitative assessments of the dependence of electromagnetic anomalies on field frequency, the dimensions of geoelectric inhomogeneities, and the specific resistance of the foundation of the depression. The present approach can be used in geoelectric and magnetotelluric studies of electromagnetic anomalies.

  4. Network anomaly detection a machine learning perspective

    CERN Document Server

    Bhattacharyya, Dhruba Kumar

    2013-01-01

    With the rapid rise in the ubiquity and sophistication of Internet technology and the accompanying growth in the number of network attacks, network intrusion detection has become increasingly important. Anomaly-based network intrusion detection refers to finding exceptional or nonconforming patterns in network traffic data compared to normal behavior. Finding these anomalies has extensive applications in areas such as cyber security, credit card and insurance fraud detection, and military surveillance for enemy activities. Network Anomaly Detection: A Machine Learning Perspective presents mach

  5. Development and Congenital Anomalies of the Pancreas

    OpenAIRE

    Hiroyuki Tadokoro; Masaru Takase; Bunsei Nobukawa

    2011-01-01

    Understanding how the pancreas develops is essential to understand the pathogenesis of congenital pancreatic anomalies. Recent studies have shown the advantages of investigating the development of frogs, mice, and chickens for understanding early embryonic development of the pancreas and congenital anomalies, such as choledochal cysts, anomalous pancreaticobiliary junction, annular pancreas, and pancreas divisum. These anomalies arise from failure of complete rotation and fusion during embryo...

  6. Peters anomaly: review of the literature.

    Science.gov (United States)

    Bhandari, Ramanath; Ferri, Sara; Whittaker, Beatrice; Liu, Margaret; Lazzaro, Douglas R

    2011-08-01

    Peters anomaly is a rare dramatic finding at birth and can be associated with other systemic malformations. We performed a literature review of multiple case reports and case series to better define the common characteristics and unusual findings associated with Peters anomaly. A representative case is discussed followed by a literature review of multiple case reports and case series. The literature search was conducted for the years 1969 to 2009. Cases and case series were included in the review of published English ophthalmic literature. Cases were excluded if no information was reported on ocular and systemic malformations or if no information was reported on surgical interventions or outcomes. In addition, if cases did not report laterality of the lesion, they were excluded from the review. Fifty-eight cases were found that fit the above criteria, and the relevant cases were reviewed to better characterize the systemic malformations, interventions, and outcomes associated with Peters anomaly reported in the literature. Fifty-eight cases of Peters anomaly were reviewed. Of those cases reporting sex, 56% were men and 44% of cases were women. In terms of laterality, 67.2% of cases were bilateral versus 32.8% of cases that were unilateral. Moreover, bilateral cases of Peters anomaly were associated with a higher rate of systemic malformations (71.8%) versus unilateral Peters anomaly (36.8%). This difference was significant (P anomaly type I (87.5%), as opposed to those patients with Peters anomaly type II (14.2%) (P anomaly are presented. Cornea specialists who care for pediatric patients should be aware of the common and uncommon associations with Peters anomaly. Although bilateral Peters anomaly is much more commonly associated with systemic malformations, we believe that all patients with Peters anomaly should be screened for systemic malformations by both pediatricians and geneticists and undergo chromosomal analysis and molecular genetic testing.

  7. Anomaly Detection from Hyperspectral Remote Sensing Imagery

    Directory of Open Access Journals (Sweden)

    Qiandong Guo

    2016-12-01

    Full Text Available Hyperspectral remote sensing imagery contains much more information in the spectral domain than does multispectral imagery. The consecutive and abundant spectral signals provide a great potential for classification and anomaly detection. In this study, two real hyperspectral data sets were used for anomaly detection. One data set was an Airborne Visible/Infrared Imaging Spectrometer (AVIRIS data covering the post-attack World Trade Center (WTC and anomalies are fire spots. The other data set called SpecTIR contained fabric panels as anomalies compared to their background. Existing anomaly detection algorithms including the Reed–Xiaoli detector (RXD, the blocked adaptive computation efficient outlier nominator (BACON, the random selection based anomaly detector (RSAD, the weighted-RXD (W-RXD, and the probabilistic anomaly detector (PAD are reviewed here. The RXD generally sets strict assumptions to the background, which cannot be met in many scenarios, while BACON, RSAD, and W-RXD employ strategies to optimize the estimation of background information. The PAD firstly estimates both background information and anomaly information and then uses the information to conduct anomaly detection. Here, the BACON, RSAD, W-RXD, and PAD outperformed the RXD in terms of detection accuracy, and W-RXD and PAD required less time than BACON and RSAD.

  8. MRI of central nervous system anomalies

    Energy Technology Data Exchange (ETDEWEB)

    Izawa, M.; Oikawa, A.; Matoba, A.

    1987-05-01

    MRI was very useful in the evaluation of congenital anomalies of central nervous system as well as other nervous system disease with three-dimensional spatial resolution. We had experienced MRI of central nervous system anomalies, demonstrated characterisitic findings in each anomaly. MRI is useful to observe the coronal, horizontal and sagittal images of the brain and spinal cord in order to discuss the etiological mechanisms of spinal dysraphysm and its associated anomalies. In case of spina bifida cystica MRI was available to decide operative indication for radical operation and tetherd cord developed from postoperative scar or accompanied intraspinal lesions.

  9. Vascular anomalies: differential diagnosis and mimickers.

    Science.gov (United States)

    Garzon, Maria C; Weitz, Nicole; Powell, Julie

    2016-09-01

    Vascular anomalies are very common in children and encompass a wide spectrum of diseases. Many vascular anomalies can be mistaken for infantile hemangioma (IH). In addition, there is a variety of rare disorders including benign and malignant tumors that may mimic IH and other types of vascular anomalies. Understanding the clinical features, natural history, and typical clinical course of different types of vascular anomalies is essential in order to make the correct diagnosis and guide management. Radiologic imaging plays an important role in establishing the diagnosis; and when the diagnosis remains in doubt, a biopsy performed by a surgical specialist with expertise may prove to be lifesaving.

  10. The "Parity" Anomaly On An Unorientable Manifold

    CERN Document Server

    Witten, Edward

    2016-01-01

    The "parity" anomaly -- more accurately described as an anomaly in time-reversal or reflection symmetry -- arises in certain theories of fermions coupled to gauge fields and/or gravity in a spacetime of odd dimension. The "parity" anomaly has traditionally been studied on orientable manifolds only, but recent developments involving topological superconductors have made it clear that one can get more information by asking what happens on an unorientable manifold. In this paper, we analyze the "parity" anomaly for fermions coupled to gauge fields and gravity in $2+1$ dimensions. We consider applications to gapped boundary states of a topological superconductor and to M2-branes in string/M-theory.

  11. Anomaly-free sets of fermions

    Energy Technology Data Exchange (ETDEWEB)

    Batra, Puneet; /Argonne; Dobrescu, Bogdan A.; /Fermilab; Spivak, David; /UC, Berkeley, Math. Dept.

    2005-10-01

    We present new techniques for finding anomaly-free sets of fermions. Although the anomaly cancellation conditions typically include cubic equations with integer variables that cannot be solved in general, we prove by construction that any chiral set of fermions can be embedded in a larger set of fermions which is chiral and anomaly-free. Applying these techniques to extensions of the Standard Model, we find anomaly-free models that have arbitrary quark and lepton charges under an additional U(1) gauge group.

  12. Consistent anomalies of the induced W gravities

    CERN Document Server

    Abud, M; Cappiello, L

    1995-01-01

    The BRST anomaly which may be present in the induced W_n gravity quantized on the light-cone is evaluated in the geometrical framework of Zucchini. The cocycles linked by the cohomology of the BRST operator to the anomaly are straightforwardly calculated thanks to the analogy between this formulation and the Yang-Mills theory. We give also a conformally covariant formulation of these quantities including the anomaly, which is valid on arbitrary Riemann surfaces. The example of the W_3 theory is discussed and a comparison with other candidates for the anomaly available in the literature is presented.

  13. The prevalence of congenital anomalies in Europe

    DEFF Research Database (Denmark)

    Dolk, Helen; Loane, Maria; Garne, Ester

    2010-01-01

    anomalies overwhelmingly concern children surviving the early neonatal period, who have important medical, social or educational needs. The prevalence of chromosomal anomalies was 3.6 per 1,000 births, contributing 28% of stillbirths/fetal deaths from 20 weeks gestation with congenital anomaly, and 48...... of 23.9 per 1,000 births for 2003-2007. 80% were livebirths. 2.5% of livebirths with congenital anomaly died in the first week of life. 2.0% were stillbirths or fetal deaths from 20 weeks gestation. 17.6% of all cases were terminations of pregnancy following prenatal diagnosis (TOPFA). Thus, congenital...

  14. Anomaly-Free Sets of Fermions

    CERN Document Server

    Batra, P; Spivak, D; Batra, Puneet; Dobrescu, Bogdan A.; Spivak, David

    2006-01-01

    We present new techniques for finding anomaly-free sets of fermions. Although the anomaly cancellation conditions typically include cubic equations with integer variables that cannot be solved in general, we prove by construction that any chiral set of fermions can be embedded in a larger set of fermions which is chiral and anomaly-free. Applying these techniques to extensions of the Standard Model, we find anomaly-free models that have arbitrary quark and lepton charges under an additional U(1) gauge group.

  15. Spectral Methods for Magnetic Anomalies

    Science.gov (United States)

    Parker, R. L.; Gee, J. S.

    2013-12-01

    Spectral methods, that is, those based in the Fourier transform, have long been employed in the analysis of magnetic anomalies. For example, Schouten and MaCamy's Earth filter is used extensively to map patterns to the pole, and Parker's Fourier transform series facilitates forward modeling and provides an efficient algorithm for inversion of profiles and surveys. From a different, and perhaps less familiar perspective, magnetic anomalies can be represented as the realization of a stationary stochastic process and then statistical theory can be brought to bear. It is vital to incorporate the full 2-D power spectrum, even when discussing profile data. For example, early analysis of long profiles failed to discover the small-wavenumber peak in the power spectrum predicted by one-dimensional theory. The long-wavelength excess is the result of spatial aliasing, when energy leaks into the along-track spectrum from the cross-track components of the 2-D spectrum. Spectral techniques may be used to improve interpolation and downward continuation of survey data. They can also evaluate the reliability of sub-track magnetization models both across and and along strike. Along-strike profiles turn out to be surprisingly good indicators of the magnetization directly under them; there is high coherence between the magnetic anomaly and the magnetization over a wide band. In contrast, coherence is weak at long wavelengths on across-strike lines, which is naturally the favored orientation for most studies. When vector (or multiple level) measurements are available, cross-spectral analysis can reveal the wavenumber interval where the geophysical signal resides, and where noise dominates. One powerful diagnostic is that the phase spectrum between the vertical and along-path components of the field must be constant 90 degrees. To illustrate, it was found that on some very long Project Magnetic lines, only the lowest 10% of the wavenumber band contain useful geophysical signal. In this

  16. Congenital anomalies surveillance in Canada.

    Science.gov (United States)

    Lowry, R Brian

    2008-01-01

    Congenital anomalies (CA) are present in approximately 3% of all newborn babies and account for about 12% of paediatric hospital admissions. They represent an important public health problem. Surveillance is especially important so that preventive measures such as folic acid fortification can be properly assessed without resorting to a series of ad hoc studies. Canada's surveillance of CAs is weak, with only Alberta and British Columbia having established sytems. Most provinces have perinatal systems but their CA data are incomplete and they do not capture terminations of pregnancy. The same is true of the Public Health Agency of Canada's system. A new system, the Fetal Alert Network, has been proposed for Ontario, which represents a start but will require additional sources of ascertainment if it is to be a truly population-based system for Ontario.

  17. GRAVITY ANOMALIES OF THE MOON

    Directory of Open Access Journals (Sweden)

    S. G. Pugacheva

    2015-01-01

    Full Text Available The source of gravity anomalies of the Moon are large mascons with a high mass concentration at a depth of volcanic plains and lunar Maria. New data on the gravitational field of the Moon were obtained from two Grail spacecrafts. The article presents the data of physical and mechanical properties of the surface soil layer of the lunar Maria and gives an assessment of the chemical composition of the soil. There have been calculated heterogeneity parameters of the surface macro-relief of the lunar Maria: albedo, soil density, average grain diameter of the particles forming the surface layer and the volume fraction occupied by particles. It can be assumed that mascons include rich KREEP rocks with a high content of thorium and iron oxide. Formation of mascons is connected with intensive development of basaltic volcanism on the Moon in the early periods of its existence.

  18. Magnitude Anomalies and Propagation of Local Phases

    Science.gov (United States)

    1983-01-31

    statistically significant variation of magnitude anomalies versus one of this above parameters. A contrario, we observed a significant dependance between...enough to demand a more detailed analysis. III - Local dependance of magnitude anomalies. A smoothing of our data on all quakes originating in the same

  19. Anomalies of Nuclear Criticality, Revision 6

    Energy Technology Data Exchange (ETDEWEB)

    Clayton, E. D.; Prichard, Andrew W.; Durst, Bonita E.; Erickson, David; Puigh, Raymond J.

    2010-02-19

    This report is revision 6 of the Anomalies of Nuclear Criticality. This report is required reading for the training of criticality professionals in many organizations both nationally and internationally. This report describes many different classes of nuclear criticality anomalies that are different than expected.

  20. Improved prenatal detection of chromosomal anomalies

    DEFF Research Database (Denmark)

    Frøslev-Friis, Christina; Hjort-Pedersen, Karina; Henriques, Carsten U;

    2011-01-01

    Prenatal screening for karyotype anomalies takes place in most European countries. In Denmark, the screening method was changed in 2005. The aim of this study was to study the trends in prevalence and prenatal detection rates of chromosome anomalies and Down syndrome (DS) over a 22-year period....

  1. Remarks on Global Anomalies in RCFT Orientifolds

    CERN Document Server

    Gato-Rivera, Beatriz

    2006-01-01

    We check the list of supersymmetric standard model orientifold spectra of Dijkstra, Huiszoon and Schellekens for the presence of global anomalies, using probe branes. Absence of global anomalies is found to impose strong constraints, but in nearly all cases they are automatically satisfied by the solutions to the tadpole cancellation conditions.

  2. Coronary CTA assessment of coronary anomalies.

    NARCIS (Netherlands)

    Pursnani, A.; Jacobs, J.E.; Saremi, F.; Levisman, J.; Makaryus, A.N.; Capunay, C.; Rogers, I.S.; Wald, C.; Azmoon, S.; Stathopoulos, I.A.; Srichai, M.B.

    2012-01-01

    Coronary anomalies occur in <1% of the general population and can range from a benign incidental finding to the cause of sudden cardiac death. The coronary anomalies are classified here according to the traditional grouping into those of origin and course, intrinsic arterial anatomy, and

  3. Effective action for supersymmetric chiral anomaly

    Energy Technology Data Exchange (ETDEWEB)

    Krivoshchekov, V.K.; Chekhov, L.O.

    1987-05-01

    It is shown that consistency conditions of the type of the Wess-Zumino conditions are necessary and sufficient conditions for local integrability of the supersymmetric chiral anomaly. It follows from the requirement of global integrability that the coefficient of the anomalous action is discrete. Explicit expressions are obtained for consistent anomalies and the corresponding functionals, which depend on superfields of various types.

  4. Coronary CTA assessment of coronary anomalies.

    NARCIS (Netherlands)

    Pursnani, A.; Jacobs, J.E.; Saremi, F.; Levisman, J.; Makaryus, A.N.; Capunay, C.; Rogers, I.S.; Wald, C.; Azmoon, S.; Stathopoulos, I.A.; Srichai, M.B.

    2012-01-01

    Coronary anomalies occur in <1% of the general population and can range from a benign incidental finding to the cause of sudden cardiac death. The coronary anomalies are classified here according to the traditional grouping into those of origin and course, intrinsic arterial anatomy, and terminat

  5. Seasonality of congenital anomalies in Europe

    DEFF Research Database (Denmark)

    Luteijn, Johannes Michiel; Dolk, Helen; Addor, Marie-Claude;

    2014-01-01

    with influenza. RESULTS: We detected statistically significant seasonality in prevalence of anomalies previously associated with influenza, but the conception peak was in June (2.4% excess). We also detected seasonality in congenital cataract (April conceptions, 27%), hip dislocation and/or dysplasia (April, 12......%), congenital hydronephrosis (July, 12%), urinary defects (July, 5%), and situs inversus (December, 36%), but not for nonchromosomal anomalies combined, chromosomal anomalies combined, or other anomalies analyzed. CONCLUSION: We have confirmed previously described seasonality for congenital cataract and hip......BACKGROUND: This study describes seasonality of congenital anomalies in Europe to provide a baseline against which to assess the impact of specific time varying exposures such as the H1N1 pandemic influenza, and to provide a comprehensive and recent picture of seasonality and its possible relation...

  6. Regional magnetic anomaly constraints on continental rifting

    Science.gov (United States)

    Vonfrese, R. R. B.; Hinze, W. J.; Olivier, R.; Bentley, C. R.

    1985-01-01

    Radially polarized MAGSAT anomalies of North and South America, Europe, Africa, India, Australia and Antarctica demonstrate remarkably detailed correlation of regional magnetic lithospheric sources across rifted margins when plotted on a reconstruction of Pangea. These major magnetic features apparently preserve their integrity until a superimposed metamorphoric event alters the magnitude and pattern of the anomalies. The longevity of continental scale magnetic anomalies contrasts markedly with that of regional gravity anomalies which tend to reflect predominantly isostatic adjustments associated with neo-tectonism. First observed as a result of NASA's magnetic satellite programs, these anomalies provide new and fundamental constraints on the geologic evolution and dynamics of the continents and oceans. Accordingly, satellite magnetic observations provide a further tool for investigating continental drift to compliment other lines of evidence in paleoclimatology, paleontology, paleomagnetism, and studies of the radiometric ages and geometric fit of the continents.

  7. KIDNEY ANOMALIES: HORSE SHOE KIDNEY

    Directory of Open Access Journals (Sweden)

    Hemalatha

    2015-03-01

    Full Text Available INTRODUCTION : Horse Shoe Kidney was first recognized during an autopsy by De Carpi in 1521. This anomaly consists of two distinct renal masses lying vertically on either side of the midline and connected at their respective lower poles by a parenchymatous or fibrous isthmus that crosses the mid pl ane of the body. This isthmus lies at the level of 4th lumbar vertebra just beneath the origin of inferior mesenteric artery in about 40% of cases. Fusion of upper poles instead of the lower poles results in a n inverted horse Shoe Kidney which constitute 5 - 10% of ail Horse - Shoe kidneys , (i.e. in 95% of HSK , fusion is at lower poles. HSK is found more commonly in males by a 2 : 1 margin. AIM OF STUDY : An attempt has been made to know the various anomalies . The study has been taken up with the fond hope of helping the clinician , sonologist , and surgeons during their routine work. To apply this knowledge to the incoming post graduates in their research works. EMBRIOLOGICAL BASIS & KDNEY : The abnormality originates between 4th and 6th weeks of gestation , after the ureteral bud has entered the renal blastema. Boyden (1931 postulated that at the 14mm stage (4.5 weeks the developing metanephric masses lie close to one another , any disturbance in their relationship may result in joining at their inferior poles. A slight alteration in the position of the umbilical or common iliac artery could change the orientation of migrating kidneys thus leading to contact and fusion. In 1941 Dees (Nation 1945 , Bell 1946 , Gleen 1959 , Campbell 1970 described horse - shoe kidney di sease occurrence in 0.25% of the population or about 1 in 400. OBSERVATION : In the present study 176 specimens of kidneys were studied out of which 40 were fetal specimens and the rest were adult specimens consisting of both cadaveric and sonograms. The ad ult specimens from cadavers were 76 and 60 from sonograms. MATERIAL & METHODS : Abdomen is opened ; superficial viscera and

  8. Fetal extracardiac anomalies associated with congenital cardiac diseases

    Energy Technology Data Exchange (ETDEWEB)

    Yi, Bum Ha; Cho, Jung Yeon; Lee, Young Ho; Song, Mi Jin [Samsung Cheil Hospital, Sungkyunkwan University School of Medicine, Seoul (Korea, Republic of)

    2004-06-15

    To evaluate the incidence of associated extracardiac anomalies in fetuses with congenital heart defects on fetal echocardiography, and to estimate the incidence of chromosomal abnormalities according to the extracardiac anomalies. From Jan. 1999 to Dec. 2001, 101 fetuses with prenatally diagnosed extracardiac anomalies and congenital cardiac diseases were selected for study. The mean gestational age at the time of the ultrasound exam was about 25 weeks. Associated extracardiac anomalies were classified into CNS, face and neck, thorax, abdomen, genitourinary system, musculoskeletal, other and multi-systemic anomalies groups. Chromosomal studies including chorionic villi sampling, amniocentesis, cordocentesis, and postnatal exam were correlated. Musculoskeletal anomalies were the most commonly associated extracardiac anomalies (n=28, 27.7%). Abdominal anomaly (n=26, 25.7%), central nervous system anomaly (n=25, 24.8%), genitourinary anomaly(n=12, 11.9%), thoracic anomaly (n=4, 4%), face and neck anomaly (n=3, 3%) were found. Twenty eight fetuses showed other anomalies (n=28, 27.7%). Multi-systemic anomalies were also common (n=20, 19.8%). Fetal anomalies involving two systems were noted in 15 fetuses, and anomalies of more than three systems were not uncommon (5 fetuses). Chromosomal study of 38 fetuses revealed 19 fetuses with abnormal karyotypes (50%). For 19 fetuses with abnormal karyotypes, central nervous system anomalies and musculoskeletal anomalies were the most frequently associated with extracardiac abnormalities (n=9). Multi-systemic anomalies were associated in 9 of the 19 fetuses. In fetuses with cardiac defects, the musculoskeletal, abdomen and CNS anomalies were commonly associated with extracardiac anomalies. Various extracardiac anomalies such as, head and neck anomalies, CNS anomalies, musculoskeletal anomalies, and multi-organ anomalies were highly correlated with chromosomal abnormalities, and so this relationship requires chromosomal study.

  9. Anomaly Detection in Dynamic Networks

    Energy Technology Data Exchange (ETDEWEB)

    Turcotte, Melissa [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2014-10-14

    Anomaly detection in dynamic communication networks has many important security applications. These networks can be extremely large and so detecting any changes in their structure can be computationally challenging; hence, computationally fast, parallelisable methods for monitoring the network are paramount. For this reason the methods presented here use independent node and edge based models to detect locally anomalous substructures within communication networks. As a first stage, the aim is to detect changes in the data streams arising from node or edge communications. Throughout the thesis simple, conjugate Bayesian models for counting processes are used to model these data streams. A second stage of analysis can then be performed on a much reduced subset of the network comprising nodes and edges which have been identified as potentially anomalous in the first stage. The first method assumes communications in a network arise from an inhomogeneous Poisson process with piecewise constant intensity. Anomaly detection is then treated as a changepoint problem on the intensities. The changepoint model is extended to incorporate seasonal behavior inherent in communication networks. This seasonal behavior is also viewed as a changepoint problem acting on a piecewise constant Poisson process. In a static time frame, inference is made on this extended model via a Gibbs sampling strategy. In a sequential time frame, where the data arrive as a stream, a novel, fast Sequential Monte Carlo (SMC) algorithm is introduced to sample from the sequence of posterior distributions of the change points over time. A second method is considered for monitoring communications in a large scale computer network. The usage patterns in these types of networks are very bursty in nature and don’t fit a Poisson process model. For tractable inference, discrete time models are considered, where the data are aggregated into discrete time periods and probability models are fitted to the

  10. Vitellointestinal Duct Anomalies in Infancy

    Science.gov (United States)

    Kadian, Yogender Singh; Verma, Anjali; Rattan, Kamal Nain; Kajal, Pardeep

    2016-01-01

    Background: Vitellointestinal duct (VID) or omphalomesenteric duct anomalies are secondary to the persistence of the embryonic vitelline duct, which normally obliterates by weeks 5–9 of intrauterine life. Methods: This is a retrospective analysis of a total of 16 patients of symptomatic remnants of vitellointestinal duct from period of Jan 2009 to May 2013. Results: Male to female ratio (M:F) was 4.3:1 and mean age of presentation was 2 months and their mode of presentation was: patent VID in 9 (56.25%) patients, umbilical cyst in 2(12.25%), umbilical granuloma in 2 (12.25%), and Meckel diverticulum as content of hernia sac in obstructed umbilical hernia in 1 (6.25%) patient. Two patients with umbilical fistula had severe electrolyte disturbance and died without surgical intervention. Conclusion: Persistent VID may have varied presentations in infancy. High output umbilical fistula and excessive bowel prolapse demand urgent surgical intervention to avoid morbidity and mortality. PMID:27433448

  11. Holography and Conformal Anomaly Matching

    CERN Document Server

    Cabo-Bizet, Alejandro; Narain, K S

    2013-01-01

    We discuss various issues related to the understanding of the conformal anomaly matching in CFT from the dual holographic viewpoint. First, we act with a PBH diffeomorphism on a generic 5D RG flow geometry and show that the corresponding on-shell bulk action reproduces the Wess-Zumino term for the dilaton of broken conformal symmetry, with the expected coefficient aUV-aIR. Then we consider a specific 3D example of RG flow whose UV asymptotics is normalizable and admits a 6D lifting. We promote a modulus \\rho appearing in the geometry to a function of boundary coordinates. In a 6D description {\\rho} is the scale of an SU(2) instanton. We determine the smooth deformed background up to second order in the space-time derivatives of \\rho and find that the 3D on-shell action reproduces a boundary kinetic term for the massless field \\tau= log(\\rho) with the correct coefficient \\delta c=cUV-cIR. We further analyze the linearized fluctuations around the deformed background geometry and compute the one-point functions ...

  12. Data Mining for Anomaly Detection

    Science.gov (United States)

    Biswas, Gautam; Mack, Daniel; Mylaraswamy, Dinkar; Bharadwaj, Raj

    2013-01-01

    The Vehicle Integrated Prognostics Reasoner (VIPR) program describes methods for enhanced diagnostics as well as a prognostic extension to current state of art Aircraft Diagnostic and Maintenance System (ADMS). VIPR introduced a new anomaly detection function for discovering previously undetected and undocumented situations, where there are clear deviations from nominal behavior. Once a baseline (nominal model of operations) is established, the detection and analysis is split between on-aircraft outlier generation and off-aircraft expert analysis to characterize and classify events that may not have been anticipated by individual system providers. Offline expert analysis is supported by data curation and data mining algorithms that can be applied in the contexts of supervised learning methods and unsupervised learning. In this report, we discuss efficient methods to implement the Kolmogorov complexity measure using compression algorithms, and run a systematic empirical analysis to determine the best compression measure. Our experiments established that the combination of the DZIP compression algorithm and CiDM distance measure provides the best results for capturing relevant properties of time series data encountered in aircraft operations. This combination was used as the basis for developing an unsupervised learning algorithm to define "nominal" flight segments using historical flight segments.

  13. Thermal infrared anomalies of several strong earthquakes.

    Science.gov (United States)

    Wei, Congxin; Zhang, Yuansheng; Guo, Xiao; Hui, Shaoxing; Qin, Manzhong; Zhang, Ying

    2013-01-01

    In the history of earthquake thermal infrared research, it is undeniable that before and after strong earthquakes there are significant thermal infrared anomalies which have been interpreted as preseismic precursor in earthquake prediction and forecasting. In this paper, we studied the characteristics of thermal radiation observed before and after the 8 great earthquakes with magnitude up to Ms7.0 by using the satellite infrared remote sensing information. We used new types of data and method to extract the useful anomaly information. Based on the analyses of 8 earthquakes, we got the results as follows. (1) There are significant thermal radiation anomalies before and after earthquakes for all cases. The overall performance of anomalies includes two main stages: expanding first and narrowing later. We easily extracted and identified such seismic anomalies by method of "time-frequency relative power spectrum." (2) There exist evident and different characteristic periods and magnitudes of thermal abnormal radiation for each case. (3) Thermal radiation anomalies are closely related to the geological structure. (4) Thermal radiation has obvious characteristics in abnormal duration, range, and morphology. In summary, we should be sure that earthquake thermal infrared anomalies as useful earthquake precursor can be used in earthquake prediction and forecasting.

  14. MR imaging of paediatric uterovaginal anomalies

    Energy Technology Data Exchange (ETDEWEB)

    Lang, I.M.; Babyn, P. [Hospital for Sick Children, Toronto, ON (Canada). Dept. of Diagnostic Imaging; Oliver, G.D. [Hospital for Sick Children, Toronto, ON (Canada). Dept. of Gynaecology

    1999-03-01

    Background. Transabdominal ultrasound (US) has not proved completely reliable in Muellerian duct anomalies. One study has shown it useful in obstructed uterovaginal anomalies. We are unaware of a study that has used endovaginal ultrasound in children to investigate uterovaginal anomalies. Magnetic resonance imaging (MRI) is now gaining wide acceptance in imaging congenital abnormalities of the genital tract. Objective. To identify the problems and potential pitfalls of using MRI to evaluate the female genital tract in paediatric patients. Materials and methods. A retrospective review of the MRI scans of 19 patients, aged 3 months to 19 years (mean 14 years), with uterovaginal anomalies. Results. The uterovaginal anomalies were categorised into three groups: (1) congenital absence of the Muellerian ducts, or the Mayer-Rokitansky-Kuster-Hauser syndrome (n = 7), (2) disorders of vertical fusion (n = 2) and (3) disorders of lateral fusion (n = 10). Conclusions. MRI is a reliable method for evaluating paediatric uterovaginal anomalies, but should be analysed in conjunction with other imaging modalities (US and genitography). Previous surgery makes interpretation more difficult and, if possible, MRI should be carried out prior to any surgery. An accurate MRI examination can be extremely helpful prior to surgery and it is important for the radiologist to have knowledge of how these complex anomalies are managed and what pitfalls to avoid. (orig.) With 7 figs., 4 tabs., 24 refs.

  15. Galilean Anomalies and Their Effect on Hydrodynamics

    CERN Document Server

    Jain, Akash

    2015-01-01

    We extend the null background construction of [arXiv:1505.05677,arXiv:1509.04718] to include torsion and a conserved spin current, and use it to study gauge and gravitational anomalies in Galilean theories coupled to torsional Newton-Cartan backgrounds. We establish that the relativistic anomaly inflow mechanism with an appropriately modified anomaly polynomial, can be used to generate these anomalies. Similar to relativistic case, we find that Galilean anomalies also survive only in even dimensions. Further, these anomalies only effect the gauge and rotational symmetries of a Galilean theory; in particular the Milne boost symmetry remains non-anomalous. We also extend the transgression machinery used in relativistic fluids to fluids on null backgrounds, and use it to determine how these anomalies affect the constitutive relations of a Galilean fluid. Unrelated to Galilean fluids, we propose an analogue of the off-shell second law of thermodynamics for relativistic fluids introduced by [arXiv:1106.0277], to i...

  16. Sea surface temperature anomalies in the Arabian Sea

    Digital Repository Service at National Institute of Oceanography (India)

    RameshKumar, M.R.

    . Further analysis has shown that the sea surface anomalies are well correlated to the anomalies of air temperature and latent heat flux values; whereas they are least correlated to the anomalies of wind stress and net radiation values, except over...

  17. Praenatalt diagnosticeret hydronefrose og andre urologiske anomalier

    DEFF Research Database (Denmark)

    Cortes, Dina; Jørgensen, Troels Munch; Rittig, Søren

    2006-01-01

    By renal ultrasound examination, urological anomalies may be demonstrated in 1-2% of fetuses and in about 0.5% of newborns. Boys have about twice the frequency of girls. Surgical treatment is indicated in about one fourth of these urological anomalies. If all pregnant women in Denmark were to have...... fetal ultrasound examination of the kidneys and the urinary tract, about 70 children would be born each year with a prenatally diagnosed urological anomaly for which surgical procedure is or will be indicated. This paper provides Danish guidelines for prenatal diagnosis, follow-up and intervention...

  18. Anomaly and exotic statistics in one dimension

    CERN Document Server

    Saradzhev, F M

    1995-01-01

    We study the influence of the anomaly on the physical quantum picture of the chiral Schwinger model (CSM) defined on S^1. We show that such phenomena as the total screening of charges and the dynamical mass generation characteristic for the standard Schwinger model do not take place here. Instead of them, the anomaly results in the background linearly rising electric field or, equivalently, in the exotic statistics of the physical matter field. We construct the algebra of the Poincare generators and show that it differs from the Poincare one. For the CSM on R^1, the anomaly influences only the mass generation mechanism.

  19. Simple recipe for holographic Weyl anomaly

    CERN Document Server

    Bugini, F

    2016-01-01

    We propose a recipe - arguably the simplest - to compute the holographic type-B Weyl anomaly for general higher-derivative gravity in asymptotically AdS spacetimes. In 5 and 7 dimensions we identify a suitable basis of curvature invariants that allows to read off easily, without any further computation, the Weyl anomaly coefficients of the dual CFT. We tabulate the contributions from quadratic, cubic and quartic purely algebraic curvature invariants and also from terms involving derivatives of the curvature. We provide few examples, where the anomaly coefficients have been obtained by other means, to illustrate the effectiveness of our prescription.

  20. Considerations in the Interpretation of Cosmological Anomalies

    CERN Document Server

    Peiris, Hiranya V

    2014-01-01

    Anomalies drive scientific discovery -- they are associated with the cutting edge of the research frontier, and thus typically exploit data in the low signal-to-noise regime. In astronomy, the prevalence of systematics --- both "known unknowns" and "unknown unknowns" --- combined with increasingly large datasets, the widespread use of ad hoc estimators for anomaly detection, and the "look-elsewhere" effect, can lead to spurious false detections. In this informal note, I argue that anomaly detection leading to discoveries of new physics requires a combination of physical understanding, careful experimental design to avoid confirmation bias, and self-consistent statistical methods. These points are illustrated with several concrete examples from cosmology.

  1. Gravitational anomalies in higher dimensional Riemann Cartan space

    Science.gov (United States)

    Yajima, S.; Tokuo, S.; Fukuda, M.; Higashida, Y.; Kamo, Y.; Kubota, S.-I.; Taira, H.

    2007-02-01

    By applying the covariant Taylor expansion method of the heat kernel, the covariant Einstein anomalies associated with a Weyl fermion of spin \\frac{1}{2} in four-, six- and eight-dimensional Riemann Cartan space are manifestly given. Many unknown terms with torsion tensors appear in these anomalies. The Lorentz anomaly is intimately related to the Einstein anomaly even in Riemann Cartan space. The explicit form of the Lorentz anomaly corresponding to the Einstein anomaly is also obtained.

  2. Gravitational anomalies in higher dimensional Riemann-Cartan space

    Energy Technology Data Exchange (ETDEWEB)

    Yajima, S [Department of Physics, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555 (Japan); Tokuo, S [Department of Physics, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555 (Japan); Fukuda, M [Department of Physics, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555 (Japan); Higashida, Y [Takuma National College of Technology, 551 kohda, Takuma-cho, Mitoyo, Kagawa 769-1192 (Japan); Kamo, Y [Radioisotope Center, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582 (Japan); Kubota, S-I [Computing and Communications Center, Kagoshima University, 1-21-35 Koorimoto, Kagoshima 890-0065 (Japan); Taira, H [Department of Physics, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555 (Japan)

    2007-02-21

    By applying the covariant Taylor expansion method of the heat kernel, the covariant Einstein anomalies associated with a Weyl fermion of spin 1/2 in four-, six- and eight-dimensional Riemann-Cartan space are manifestly given. Many unknown terms with torsion tensors appear in these anomalies. The Lorentz anomaly is intimately related to the Einstein anomaly even in Riemann-Cartan space. The explicit form of the Lorentz anomaly corresponding to the Einstein anomaly is also obtained.

  3. Using EVT for Geological Anomaly Design and Its Application in Identifying Anomalies in Mining Areas

    Directory of Open Access Journals (Sweden)

    Feilong Qin

    2016-01-01

    Full Text Available A geological anomaly is the basis of mineral deposit prediction. Through the study of the knowledge and characteristics of geological anomalies, the category of extreme value theory (EVT to which a geological anomaly belongs can be determined. Associating the principle of the EVT and ensuring the methods of the shape parameter and scale parameter for the generalized Pareto distribution (GPD, the methods to select the threshold of the GPD can be studied. This paper designs a new algorithm called the EVT model of geological anomaly. These study data on Cu and Au originate from 26 exploration lines of the Jiguanzui Cu-Au mining area in Hubei, China. The proposed EVT model of the geological anomaly is applied to identify anomalies in the Jiguanzui Cu-Au mining area. The results show that the model can effectively identify the geological anomaly region of Cu and Au. The anomaly region of Cu and Au is consistent with the range of ore bodies of actual engineering exploration. Therefore, the EVT model of the geological anomaly can effectively identify anomalies, and it has a high indicating function with respect to ore prospecting.

  4. Comparison of Unsupervised Anomaly Detection Methods

    Data.gov (United States)

    National Aeronautics and Space Administration — Several different unsupervised anomaly detection algorithms have been applied to Space Shuttle Main Engine (SSME) data to serve the purpose of developing a...

  5. Magnetic anomalies in Central Bengal fan

    Digital Repository Service at National Institute of Oceanography (India)

    Rao, T.C.S.; Lakshminarayana, S.; Sarma, K.V.L.N.S.

    Total magnetic field anomalies recorded over the Central Bengal Fan are analysed and the depths to the magnetic basement are computed using the analytical signal and the Werner deconvolution methods. To the west and east of 85 degrees E...

  6. Ionospheric Anomaly before Kyushu|Japan Earthquake

    Directory of Open Access Journals (Sweden)

    YANG Li

    2017-05-01

    Full Text Available GIM data released by IGS is used in the article and a new method of combining the Sliding Time Window Method and the Ionospheric TEC correlation analysis method of adjacent grid points is proposed to study the relationship between pre-earthquake ionospheric anomalies and earthquake. By analyzing the abnormal change of TEC in the 5 grid points around the seismic region, the abnormal change of ionospheric TEC is found before the earthquake and the correlation between the TEC sequences of lattice points is significantly affected by earthquake. Based on the analysis of the spatial distribution of TEC anomaly, anomalies of 6 h, 12 h and 6 h were found near the epicenter three days before the earthquake. Finally, ionospheric tomographic technology is used to do tomographic inversion on electron density. And the distribution of the electron density in the ionospheric anomaly is further analyzed.

  7. SEG US Bouguer Gravity Anomaly Grid

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The SEG gravity data are the product of the ad hoc Gravity Anomaly Map (GAM) Committee, sponsored by the Society of Exploration Geophysicists (SEG) and the U.S....

  8. Mexico Terrain Corrected Free Air Anomalies (97)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This 2' gravity anomaly grid for Mexico, North-Central America and the Western Caribbean Sea is NOT the input data set used in the development of the MEXICO97 model....

  9. Design and Implementation of an Anomaly Detector

    Energy Technology Data Exchange (ETDEWEB)

    Bagherjeiran, A; Cantu-Paz, E; Kamath, C

    2005-07-11

    This paper describes the design and implementation of a general-purpose anomaly detector for streaming data. Based on a survey of similar work from the literature, a basic anomaly detector builds a model on normal data, compares this model to incoming data, and uses a threshold to determine when the incoming data represent an anomaly. Models compactly represent the data but still allow for effective comparison. Comparison methods determine the distance between two models of data or the distance between a model and a point. Threshold selection is a largely neglected problem in the literature, but the current implementation includes two methods to estimate thresholds from normal data. With these components, a user can construct a variety of anomaly detection schemes. The implementation contains several methods from the literature. Three separate experiments tested the performance of the components on two well-known and one completely artificial dataset. The results indicate that the implementation works and can reproduce results from previous experiments.

  10. Major congenital anomalies in a Danish region

    DEFF Research Database (Denmark)

    Garne, Ester; Hansen, Anne Vinkel; Birkelund, Anne Sofie;

    2014-01-01

    : diabetes, epilepsy, mental disorder, thyroid disease, asthma, or inflammatory bowel disease. Medication for these conditions accounted for 46% of maternal drug use. CONCLUSION: Maternal morbidity and use of potentially teratogenic medication have increased among congenital anomaly cases. Foetal and infant...

  11. Isostatic geoid anomalies on a sphere

    Science.gov (United States)

    Dahlen, F. A.

    1982-01-01

    Long-wavelength geoid anomalies due to lateral variations in the density or thickness of a thin layer in local isostatic equilibrium on the surface of a sphere depend sensitively on the assumed state of stress within the layer. A number of common intuitive definitions of local isostasy generally believed to be essentially identical are associated with quite different states of isostatic stress, and the corresponding theoretical geoid anomalies can vary by more than a factor of 2. This sensitivity of the theoretical anomaly to the exact definition of local isostasy constitutes an obstacle to any proposed program of interpreting or exploiting observed global isostatic geoid anomalies such as those associated with the aging of the oceanic lithosphere.

  12. Coral Reef Watch, Temperature Anomaly, 50 km

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NOAA Coral Reef Watch distributes SST anomaly data using a combination of the POES AVHRR Global Area Coverage data, and data from a climatological database. AVHRR...

  13. Congenital microgastria and hypoplastic upper limb anomalies.

    Science.gov (United States)

    Lueder, G T; Fitz-James, A; Dowton, S B

    1989-03-01

    Six cases of congenital microgastria associated with limb anomalies are reviewed. The microgastria-hypoplastic upper limb association may arise as a result of aberrant mesodermal development in the 5th embryonic week.

  14. Viscosity anomaly in core-softened liquids

    OpenAIRE

    Fomin, Yu. D.; Ryzhov, V. N.

    2013-01-01

    The present article presents a molecular dynamics study of several anomalies of core-softened systems. It is well known that many core-softened liquids demonstrate diffusion anomaly. Usual intuition relates the diffusion coefficient to shear viscosity via Stockes-Einstein relation. However, it can break down at low temperature. In this respect it is important to see if viscosity also demonstrates anomalous behavior.

  15. Mullerian anomalies: a cause of primary amenorrhea

    OpenAIRE

    2013-01-01

    Background: The objectives of this study were to determine the etiologic causes of amenorrhea, the prevalence of mullerian anomalies as a cause of primary amenorrhea and the different varieties of mullerian anomalies causing primary amenorrhea. Methods: This study included all the women presenting with primary amenorrhea who presented to the department of obstetrics and gynecology, Sir T Hospital and Government Medical College, Bhavnagar from 1st January 2010 to 30th June 2012. Results: The c...

  16. Efficient Accurate Context-Sensitive Anomaly Detection

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    For program behavior-based anomaly detection, the only way to ensure accurate monitoring is to construct an efficient and precise program behavior model. A new program behavior-based anomaly detection model,called combined pushdown automaton (CPDA) model was proposed, which is based on static binary executable analysis. The CPDA model incorporates the optimized call stack walk and code instrumentation technique to gain complete context information. Thereby the proposed method can detect more attacks, while retaining good performance.

  17. Lateral sacral lipomyelomeningocele : a rare anomaly.

    Directory of Open Access Journals (Sweden)

    Shetty D

    2002-04-01

    Full Text Available Lateral sacral lipomyelomeningocele is a rare spinal developmental anomaly. In the case under report, the fat attached to the neural placode was blending with the gluteal fat externally. The cord was tethered at this level. Multiple bony anomalies and diastematomyelia were associated findings. A case of lateral sacral lipomyelomeningocele with excellent imaging detail provided by the multiplanar magnetic resonance (MR scan is reported.

  18. Gauge anomalies in Lorentz-violating QED

    Science.gov (United States)

    Santos, Tiago R. S.; Sobreiro, Rodrigo F.

    2016-12-01

    In this work we study the issue of gauge anomalies in Lorentz-violating QED. To do so, we opt to use the Becchi-Rouet-Stora-Tyutin formalism within the algebraic renormalization approach, reducing our study to a cohomology problem. Since this approach is independent of the renormalization scheme, the results obtained here are expected to be general. We find that the Lorentz-violating QED is free of gauge anomalies to all orders in perturbation theory.

  19. Gauge anomalies in Lorentz-violating QED

    CERN Document Server

    Santos, Tiago R S

    2016-01-01

    In this work we study the issue of gauge anomalies in Lorentz-violating QED. To do so, we opt to use the BRST formalism within of the algebraic renormalization approach, reducing our study to a cohomology problem. Since that this approach is independent of the renormalization scheme, the results here obtained are expected to be general. We find that the Lorentz-violating QED is free of gauge anomalies to all orders in perturbation theory.

  20. Craniofacial anomalies: from development to molecular pathogenesis.

    Science.gov (United States)

    Rice, David P C

    2005-11-01

    Advances in developmental biology combined with progress in human genetics are helping us decipher how the craniofacial region develops and how the consequences of misdirected development result in malformation. This review describes the molecular etiology of a number of craniofacial developmental anomalies. The more common craniofacial anomalies cleft lip and palate and craniosynostosis, as well as cleidocranial dysplasia, hemifacial microsomia, holoprosencephaly, enlarged parietal foramina, Treacher Collins syndrome and cherubism are discussed.

  1. CP-violating CFT and trace anomaly

    CERN Document Server

    Nakayama, Yu

    2012-01-01

    It is logically possible that the trace anomaly in four dimension includes the Hirzebruch-Pontryagin density in CP violating theories. Although the term vanishes at free conformal fixed points, we realize such a possibility in the holographic renormalization group and show that it is indeed possible. The Hirzebruch-Pontryagin term in the trace anomaly may serve as a barometer to understand how much CP is violated in conformal field theories.

  2. Reports on various anomalies of the ribs

    Energy Technology Data Exchange (ETDEWEB)

    Brinkmann, G.; Brix, F.

    1988-02-01

    Three patients are presented who were suffering from different anomalies of the ribs: There was one each plus and minus variant and a female patient with Gorlin-Goltz syndrome (basal cell nevus syndrome) demonstrating several changes in the ribs as an expression of a genetically determined segmentation disturbance. These presentations are followed by a detailed discussion on the types and causes of such anomalies.

  3. Anomalous transport due to scale anomaly

    CERN Document Server

    Chernodub, M N

    2016-01-01

    We show that the scale anomaly in field theories leads to new anomalous transport effects that emerge in external electromagnetic field in inhomogeneous gravitational background. In inflating geometry the QED scale anomaly generates electric current which flows in opposite direction with respect to background electric field. In static spatially inhomogeneous gravitational background the dissipationless electric current flows transversely both to the magnetic field axis and to the gradient of the inhomogeneity. The anomalous currents are proportional to the beta function of the theory.

  4. On the topological interpretation of gravitational anomalies

    Science.gov (United States)

    Perrot, Denis

    2001-07-01

    We consider the mixed gravitational Yang-Mills anomaly as the coupling between the K-theory and K-homology of a C ∗-algebra crossed product. The index theorem of Connes-Moscovici allows to compute the Chern character of the K-cycle by local formulae involving connections and curvatures. It gives a topological interpretation to the anomaly, in the sense of noncommutative algebras.

  5. Medical imaging for congenital anomalies of the lung. Focused on tracheobronchial and parenchymal anomalies

    Energy Technology Data Exchange (ETDEWEB)

    Kohda, Ehiichi; Shiraga, Nobuyuki; Higuchi, Mutsumi; Ishibashi, Ryouchi [Tachikawa Hospital, Tokyo (Japan)

    2003-02-01

    This is a review of medical imaging studies for congenital anomalies of the lung focused on tracheobronchial and parenchymal anomalies. It is important to know the findings of these developmental anomalies, because they are frequently manifested as infectious diseases or mass. Documented details are pulmonary agenesis, aplasia, pulmonary hypoplasia, tracheal agenesis, bridging bronchus, tracheal bronchus, congenital tracheal stenosis, bronchial atresia, bronchobiliary fistula, bronchogenic cyst, bronchopulmonary sequestration, congenital cystic adenomatoid malformation, and pulmonary lymphangiectasia. (author)

  6. Clustering and Recurring Anomaly Identification: Recurring Anomaly Detection System (ReADS)

    Science.gov (United States)

    McIntosh, Dawn

    2006-01-01

    This viewgraph presentation reviews the Recurring Anomaly Detection System (ReADS). The Recurring Anomaly Detection System is a tool to analyze text reports, such as aviation reports and maintenance records: (1) Text clustering algorithms group large quantities of reports and documents; Reduces human error and fatigue (2) Identifies interconnected reports; Automates the discovery of possible recurring anomalies; (3) Provides a visualization of the clusters and recurring anomalies We have illustrated our techniques on data from Shuttle and ISS discrepancy reports, as well as ASRS data. ReADS has been integrated with a secure online search

  7. MAGSAT correlations with geoid anomalies. [magnetic anomalies in the western Gulf of Mexico

    Science.gov (United States)

    Bowin, C. O. (Principal Investigator)

    1984-01-01

    A digital data library of MAGSAT data is described and its applications and capabilities are reviewed. Polynomial trends were removed from each half-orbit in order to estimate and remove ring current effects from the data. The MAGSAT data in the Gulf of Mexico region was analyzed to define better the possible relation of the negative MAGSAT anomaly there to the negative residual geoid anomaly in the western Gulf of Mexico. Since the shape and location of the negative magnetic anomaly are variable depending upon the particular polynomial surface and curve orders used, no definitive conclusion as to the degree of correspondance between the residual geoid and MAGSAT lithosphere anomalies is offered.

  8. Abdominal aortic surgery and renal anomalies

    Directory of Open Access Journals (Sweden)

    Ilić Nikola

    2011-01-01

    Full Text Available Introduction. Kidney anomalies present a challenge even for the most experienced vascular surgeon in the reconstruction of the aortoilliac segment. The most significant anomalies described in the surgery of the aortoilliac segment are a horse-shoe and ectopic kidney. Objective. The aim of this retrospective study was to analyze experience on 40 patients with renal anomalies, who underwent surgery of the aortoilliac segment and to determine attitudes on conventional surgical treatment. Methods. In the period from 1992 to 2009, at the Clinic for Vascular Surgery of the Clinical Centre of Belgrade we operated on 40 patients with renal anomalies and aortic disease (aneurysmatic and obstructive. The retrospective analysis involved standard epidemiological data of each patient (gender, age, risk factors for atherosclerosis, type of anomaly, type of aortic disease, presurgical parameter values of renal function, type of surgical approach (laparatomy or retroperitoneal approach, classification of the renal isthmus, reimplantation of renal arteries and perioperative morbidity and mortality. Results. Twenty patients were males In 30 (70% patients we diagnosed a horse-shoe kidney and in 10 (30% ectopic kidney. In the cases of ruptured aneurysm of the abdominal aorta the diagnosis was made by ultrasound findings. Pre-surgically, renal anomalies were confirmed in all patients, except in those with a ruptured aneurysm who underwent urgent surgery. In all patients we applied medial laparatomy, except in those with a thoracoabdominal aneurysm type IV, when the retroperitonal approach was necessary. On average the patients were under follow-up for 6.2 years (from 6 months to 17 years. Conclusion. Under our conditions, the so-called double clamp technique with the preservation of the kidney gave best results in the patients with renal anomalies and aortic disease.

  9. Gynecologic concerns in patients with cloacal anomaly.

    Science.gov (United States)

    Breech, Lesley

    2016-04-01

    Children with anorectal malformations (ARM) constitute a significant group within a pediatric surgery practice. It is important with female cases of anorectal malformations to consider the association of gynecologic anomalies, especially at the time of the definitive repair. However, it is critical to consider the association of such gynecologic anomalies when caring for patients with a cloacal anomaly. If not recognized, an opportunity to diagnose and treat such anomalies may be missed with the possibility of negative implications for future reproductive capacity. With the knowledge of the associated anomalies and long-term sequelae, surgeons can provide better care for girls and important counseling for parents. Knowledge of reproductive related issues in females with cloaca allows the pediatric surgeon an opportunity both, to provide optimal surgical management in infancy, childhood, and into young adulthood and to collaborate medically and surgically with an experienced gynecologist in patients with more complex anatomic variations. Appropriate counseling for patients and families about potential reproductive concerns that may develop many years after the definitive surgical repair allows preparation and planning to preserve future fertility. Copyright © 2016 Elsevier Inc. All rights reserved.

  10. Geopotential field anomalies and regional tectonic features

    Science.gov (United States)

    Mandea, Mioara; Korte, Monika

    2016-07-01

    Maps of both gravity and magnetic field anomalies offer crucial information about physical properties of the Earth's crust and upper mantle, required in understanding geological settings and tectonic structures. Density and magnetization represent independent rock properties and thus provide complementary information on compositional and structural changes. Two regions are considered: southern Africa (encompassing South Africa, Namibia and Botswana) and Germany. This twofold choice is motivated firstly by the fact that these regions represent rather diverse geological and geophysical conditions (old Archean crust with strong magnetic anomalies in southern Africa, and much younger, weakly magnetized crust in central Europe) and secondly by our intimate knowledge of the magnetic vector ground data from these two regions. We take also advantage of the recently developed satellite potential field models and compare magnetic and gravity gradient anomalies of some 200 km resolution. Comparing short and long wavelength anomalies and the correlation of rather large scale magnetic and gravity anomalies, and relating them to known lithospheric structures, we generally find a better agreement over the southern African region than the German territory. This probably indicates a stronger concordance between near-surface and deeper structures in the former area, which can be perceived to agree with a thicker lithosphere.

  11. Etiology and Evaluation of Sperm Chromatin Anomalies

    Directory of Open Access Journals (Sweden)

    Marziyeh Tavalaee

    2008-01-01

    Full Text Available Evidence suggests that human sperm chromatin anomalies adversely affect reproductive outcomesand infertile men possess substantially amount of sperm with chromatin anomalies than fertilemen.Routine semen analysis evaluates parameters such as sperm motility and morphology, but doesnot examine the nuclear DNA integrity of spermatozoa. It has been suggested that altered nuclearchromatin structure or damaged DNA in spermatozoa could modify the special cellular functionsof human spermatozoa, and thereby affect the fertility potential. Intra-cytoplasmic sperm injection(ICSI bypass the barriers to fertilization for such a sperm, then the effect of chromatin anomalies onthe development remains a concern. Therefore, it is essential to develop and use accurate diagnostictests, which may provide better prognostic capabilities than the standard sperm assessments. Thisreview discusses our current understanding of the structure and organization of sperm DNA,the different procedures for assessment of sperm chromatin anomalies including comet assay,Chromomycin A3 (CMA3, sperm chromatin structure assay (SCSA, acridine orange test (AOT,terminal TdT-mediated dUTP-nick-end labelling (TUNEL assay, aniline blue and sperm chromatindispersion (SCD test and the impact of chromatin anomalies on reproductive outcome.

  12. Anomaly-based Network Intrusion Detection Methods

    Directory of Open Access Journals (Sweden)

    Pavel Nevlud

    2013-01-01

    Full Text Available The article deals with detection of network anomalies. Network anomalies include everything that is quite different from the normal operation. For detection of anomalies were used machine learning systems. Machine learning can be considered as a support or a limited type of artificial intelligence. A machine learning system usually starts with some knowledge and a corresponding knowledge organization so that it can interpret, analyse, and test the knowledge acquired. There are several machine learning techniques available. We tested Decision tree learning and Bayesian networks. The open source data-mining framework WEKA was the tool we used for testing the classify, cluster, association algorithms and for visualization of our results. The WEKA is a collection of machine learning algorithms for data mining tasks.

  13. Weyl Anomaly and Initial Singularity Crossing

    CERN Document Server

    Awad, Adel

    2015-01-01

    We consider the role of quantum effects, mainly, Weyl anomaly in modifying FLRW model singular behavior at early times. Weyl anomaly corrections to FLRW models have been considered in the past, here we reconsider this model and show the following: The singularity of this model is weak according to Tipler and Krolak, therefore, the spacetime might admit a geodesic extension. Weyl anomaly corrections changes the nature of the initial singularity from a big bang singularity to a sudden singularity. The two branches of solutions consistent with the semiclassical treatment form a disconnected manifold. Joining these two parts at the singularity provides us with a $C^1$ extension to nonspacelike geodesics and leaves the spacetime geodesically complete. Using Gauss-Codazzi equations one can derive generalized junction conditions for this higher-derivative gravity. The extended spacetime obeys Friedmann and Raychaudhuri equations and the junction conditions. The junction does not generate Dirac delta functions in mat...

  14. Anomaly mediation in local effective theories

    Energy Technology Data Exchange (ETDEWEB)

    Dine, Michael; Draper, Patrick [Santa Cruz Institute for Particle Physics and Department of Physics,Santa Cruz CA 95064 (United States)

    2014-02-17

    The phenomenon known as “anomaly mediation” can be understood in a variety of ways. Rather than an anomaly, certain gaugino bilinear terms are required by local supersymmetry and gauge invariance (the derivation of these terms is in some cases related to anomalies in scale invariance or R symmetries). We explain why the gaugino bilinear is required in supersymmetric gauge theories with varying number of colors and flavors. By working in the Higgs phase, gauging a flavor group, or working below the scale of gaugino condensation, each of these theories has a local effective description in which we can identify the bilinear term, establishing its necessity in the microscopic theory. For example, in theories that exhibit gaugino condensation, the potential in the very low energy theory is supersymmetric precisely due to the relation between the nonperturbative superpotential and the gaugino bilinear terms. Similarly, the gravitino mass appears from its coupling to the gaugino bilinear.

  15. The Anomaly Structure of Regularized Supergravity

    CERN Document Server

    Butter, Daniel

    2014-01-01

    On-shell Pauli-Villars regularization of the one-loop divergences of supergravity theories is used to study the anomaly structure of supergravity and the cancellation of field theory anomalies under a $U(1)$ gauge transformation and under the T-duality group of modular transformations in effective supergravity theories with three K\\"ahler moduli $T^i$ obtained from orbifold compactification of the weakly coupled heterotic string. This procedure requires constraints on the chiral matter representations of the gauge group that are consistent with known results from orbifold compactifications. Pauli-Villars regulator fields allow for the cancellation of all quadratic and logarithmic divergences, as well as most linear divergences. If all linear divergences were canceled, the theory would be anomaly free, with noninvariance of the action arising only from Pauli-Villars masses. However there are linear divergences associated with nonrenormalizable gravitino/gaugino interactions that cannot be canceled by PV fields...

  16. Neutrino anomalies and large extra dimensions

    CERN Document Server

    Dighe, A S; Dighe, Amol S.; Joshipura, Anjan S.

    2001-01-01

    Theories with large extra dimensions can generate small neutrino masses when the standard model neutrinos are coupled to singlet fermions propagating in higher dimensions. The couplings can also generate mass splittings and mixings among the flavour neutrinos in the brane. We systematically study the minimal scenario involving only one singlet bulk fermion coupling weakly to the flavour neutrinos. We explore the neutrino mass structures in the brane that can potentially account for the atmospheric, solar and LSND anomalies simultaneously in a natural way. We demonstrate that in the absence of a priori mixings among the SM neutrinos, it is not possible to reconcile all these anomalies. The presence of some structure in the mass matrix of the SM neutrinos can solve this problem. This is exemplified by the Zee model, which when embedded in extra dimensions in a minimal way can account for all the neutrino anomalies.

  17. Gauge Anomalies and Neutrino Seesaw Models

    CERN Document Server

    Neves Cebola, Luis Manuel

    Despite the success of the Standard Model concerning theoretical predictions, there are several experimental results that cannot be explained and there are reasons to believe that there exists new physics beyond it. Neutrino oscillations, and hence their masses, are examples of this. Experimentally it is known that neutrinos masses are quite small, when compared to all Standard Model particle masses. Among the theoretical possibilities to explain these tiny masses, the seesaw mechanism is a simple and well-motivated framework. In its minimal version, heavy particles are introduced that decouple from the theory in the early universe. To build consistent theories, classical symmetries need to be preserved at quantum level, so that there are no anomalies. The cancellation of these anomalies leads to constraints in the parameters of the theory. One attractive solution is to realize the anomaly cancellation through the modication of the gauge symmetry. In this thesis we present a short review of some features of t...

  18. An Immune Inspired Approach to Anomaly Detection

    CERN Document Server

    Twycross, Jamie

    2009-01-01

    The immune system provides a rich metaphor for computer security: anomaly detection that works in nature should work for machines. However, early artificial immune system approaches for computer security had only limited success. Arguably, this was due to these artificial systems being based on too simplistic a view of the immune system. We present here a second generation artificial immune system for process anomaly detection. It improves on earlier systems by having different artificial cell types that process information. Following detailed information about how to build such second generation systems, we find that communication between cells types is key to performance. Through realistic testing and validation we show that second generation artificial immune systems are capable of anomaly detection beyond generic system policies. The paper concludes with a discussion and outline of the next steps in this exciting area of computer security.

  19. Associated congenital anomalies among cases with Down syndrome.

    Science.gov (United States)

    Stoll, Claude; Dott, Beatrice; Alembik, Yves; Roth, Marie-Paule

    2015-12-01

    Down syndrome (DS) is the most common congenital anomaly widely studied for at least 150 years. However, the type and the frequency of congenital anomalies associated with DS are still controversial. Despite prenatal diagnosis and elective termination of pregnancy for fetal anomalies, in Europe, from 2008 to 2012 the live birth prevalence of DS per 10,000 was 10. 2. The objectives of this study were to examine the major congenital anomalies occurring in infants and fetuses with Down syndrome. The material for this study came from 402,532 consecutive pregnancies of known outcome registered by our registry of congenital anomalies between 1979 and 2008. Four hundred sixty seven (64%) out of the 728 cases with DS registered had at least one major associated congenital anomaly. The most common associated anomalies were cardiac anomalies, 323 cases (44%), followed by digestive system anomalies, 42 cases (6%), musculoskeletal system anomalies, 35 cases (5%), urinary system anomalies, 28 cases (4%), respiratory system anomalies, 13 cases (2%), and other system anomalies, 26 cases (3.6%). Among the cases with DS with congenital heart defects, the most common cardiac anomaly was atrioventricular septal defect (30%) followed by atrial septum defect (25%), ventricular septal defect (22%), patent ductus arteriosus (5%), coarctation of aorta (5%), and tetralogy of Fallot (3%). Among the cases with DS with a digestive system anomaly recorded, duodenal atresia (67%), Hirschsprung disease (14%), and tracheo-esophageal atresia (10%) were the most common. Fourteen (2%) of the cases with DS had an obstructive anomaly of the renal pelvis, including hydronephrosis. The other most common anomalies associated with cases with DS were syndactyly, club foot, polydactyly, limb reduction, cataract, hydrocephaly, cleft palate, hypospadias and diaphragmatic hernia. Many studies to assess the anomalies associated with DS have reported various results. There is no agreement in the literature as to

  20. Global anomalies in Chiral Lattice Gauge Theory

    Science.gov (United States)

    Bär, Oliver; Campos, Isabel

    As first realized by Witten an SU(2) gauge theory coupled to a single Weyl fermion suffers from a global anomaly. This problem is addressed here in the context of the recent developments on chiral gauge theories on the lattice. We find Witten's anomaly manifests in the impossibility of defining globally a fermion measure that reproduces the proper continuum limit. Moreover, following Witten's original argument, we check numerically the crossing of the lowest eigenvalues of Neuberger's operator along a path connecting two gauge fields that differ by a topologically non-trivial gauge transformation.

  1. Radioactive anomaly discrimination from spectral ratios

    Science.gov (United States)

    Maniscalco, James; Sjoden, Glenn; Chapman, Mac Clements

    2013-08-20

    A method for discriminating a radioactive anomaly from naturally occurring radioactive materials includes detecting a first number of gamma photons having energies in a first range of energy values within a predetermined period of time and detecting a second number of gamma photons having energies in a second range of energy values within the predetermined period of time. The method further includes determining, in a controller, a ratio of the first number of gamma photons having energies in the first range and the second number of gamma photons having energies in the second range, and determining that a radioactive anomaly is present when the ratio exceeds a threshold value.

  2. Singlet deflected anomaly/gauge mediation

    Energy Technology Data Exchange (ETDEWEB)

    Blas, J. de, E-mail: jdeblasm@nd.edu [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Delgado, A., E-mail: antonio.delgado@nd.edu [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States)

    2012-02-28

    We study an extension of the standard anomaly/gauge mediation scenario where the messenger fields have direct interactions with an extra gauge singlet. This realizes a phenomenologically viable NMSSM-like scenario free of the {mu}-b{sub {mu}} problem. Current cosmological constraints imply a small size for the anomaly-mediation contributions, unless some source of R-parity violation is permitted. In the latter case the allowed regions in the parameter space can be substantially larger than in the corresponding gauge-mediation scenario.

  3. Experimental Signatures of Anomaly Induced DCC Formation

    CERN Document Server

    Asakawa, M; Müller, B

    2002-01-01

    We discuss possible experimental signatures related to the formation of domains of disoriented chiral condensate (DCC) triggered by the axial anomaly in relativistic heavy ion collisions. Our predictions make use of the feature of the anomaly effect that is coherent over a large region of space, but opposite in sign above and below the ion scattering plane. We predict an enhancement of the fraction of neutral pions compared to all pions, which depends on the angle of emission with respect to the scattering plane and is concentrated at small transverse momentum and small rapidity in the center-of-mass frame.

  4. The GSI Time Anomaly: Facts and Fiction

    CERN Document Server

    Giunti, Carlo

    2009-01-01

    The claims that the GSI time anomaly is due to the mixing of neutrinos in the final state of the observed electron-capture decays of hydrogen-like heavy ions are refuted with the help of an analogy with a double-slit experiment. It is a consequence of causality. It is shown that the GSI time anomaly may be caused by quantum beats due to the existence of two coherent energy levels of the decaying ion with an extremely small energy splitting (about $6\\times10^{-16} \\text{eV}$) and relative probabilities having a ratio of about 1/99.

  5. Purely Four-dimensional Viable Anomaly Mediation

    CERN Document Server

    Harnik, R; Pierce, A T; Harnik, Roni; Murayama, Hitoshi; Pierce, Aaron

    2002-01-01

    Anomaly mediation of supersymmetry breaking solves the supersymmetric flavor problem thanks to its ultraviolet-insensitivity. However, it suffers from two problems: sleptons have negative masses-squared, and there are likely bulk moduli that spoil the framework. Here, we present the first fully ultraviolet-insensitive model of anomaly mediation with positive slepton masses-squared in a purely four-dimensional framework. Our model is based on the additional D-term contributions to the sparticle masses of Arkani-Hamed, Kaplan, HM, and Nomura, and the conformal sequestering mechanism of Luty and Sundrum.

  6. A rare anomaly of abductor digiti minimi.

    Science.gov (United States)

    Sañudo, J R; Mirapeix, R M; Ferreira, B

    1993-06-01

    Two cases with anomalous fascicles in abductor digiti minimi, noted in the course of dissecting 62 adult postmortem forearms, are described. Both fascicles arose from the flexor retinaculum and the antebrachial fascia; one was inserted into abductor digiti minimi and the other on the proximal phalanx of the 5th finger. The anomalous muscles crossed the ulnar nerve and in 1 case also the median nerve. In the 2nd case the palmar nerve to the 5th finger was seen to penetrate the anomalous muscle. The ontogeny, morphology and clinical significance of this anomaly are discussed in relation to previously described anomalies of the hypothenar muscles.

  7. Gauge mediated supersymmetry breaking and neutrino anomalies

    CERN Document Server

    Joshipura, A S; Joshipura, Anjan S.; Vempati, Sudhir K.

    1999-01-01

    Supersymmetric standard model with softly broken lepton symmetry provides a suitable framework to accommodate the solar and atmospheric neutrino anomalies. This model contains a natural explanation for large mixing and hierarchal masses without fine tuning of the parameters. Neutrino spectrum is particularly constrained in the minimal messenger model (MMM) of gauge mediated SUSY breaking, since all SUSY breaking effects are controlled in MMM by a single parameter. We study the structure of neutrino masses and mixing both in MMM and in simple extensions of it in the context of solar and atmospheric neutrino anomalies.

  8. The Role of Imaging in Craniofacial Anomalies

    Directory of Open Access Journals (Sweden)

    P. Alipour

    2008-01-01

    Full Text Available It is important to know craniofacial anatomy in infancy for early detection of craniofacial anomalies, to help the surgeon's decision ,for repair and increase the patients, quality of life .In this regard, imaging has the major role in preoperative diagnostic maping and post operative follow up repair."nWe are going to show the normal craniofacial anatomy appearances in infancy in order to detect early craniofacial anomaly and syndromatic craniosynostosis with plain skull X-ray and CT scan reconstruction imaging.

  9. A Natural origin for the LHCb anomalies

    CERN Document Server

    Megias, Eugenio; Pujolas, Oriol; Quiros, Mariano

    2016-01-01

    The anomalies recently found by the LHCb collaboration in $B$-meson decays seem to point towards the existence of new physics coupled non-universally to muons and electrons. We show that a beyond-the-Standard-Model dynamics with these features naturally arises in models with a warped extra-dimension that aim to solve the electroweak Hierarchy Problem. The attractiveness of our set-up is the fact that the dynamics responsible for generating the flavor anomalies is automatically present, being provided by the massive Kaluza--Klein excitations of the electroweak gauge bosons. The flavor anomalies can be easily reproduced by assuming that the bottom and muon fields have a sizable amount of compositeness, while the electron is almost elementary. Interestingly enough, this framework correlates the flavor anomalies to a pattern of corrections in the electroweak observables and in flavor-changing processes. In particular the deviations in the bottom and muon couplings to the $Z$-boson and in $\\Delta F = 2$ flavor-cha...

  10. Hyperspectral anomaly detection using enhanced global factors

    Science.gov (United States)

    Paciencia, Todd J.; Bauer, Kenneth W.

    2016-05-01

    Dimension reduction techniques have become one popular unsupervised approach used towards detecting anomalies in hyperspectral imagery. Although demonstrating promising results in the literature on specific images, these methods can become difficult to directly interpret and often require tuning of their parameters to achieve high performance on a specific set of images. This lack of generality is also compounded by the need to remove noise and atmospheric absorption spectral bands from the image prior to detection. Without a process for this band selection and to make the methods adaptable to different image compositions, performance becomes difficult to maintain across a wider variety of images. Here, we present a framework that uses factor analysis to provide a robust band selection and more meaningful dimension reduction with which to detect anomalies in the imagery. Measurable characteristics of the image are used to create an automated decision process that allows the algorithm to adjust to a particular image, while maintaining high detection performance. The framework and its algorithms are detailed, and results are shown for forest, desert, sea, rural, urban, anomaly-sparse, and anomaly-dense imagery types from different sensors. Additionally, the method is compared to current state-of-the-art methods and is shown to be computationally efficient.

  11. Alaska Terrain Corrected Free Air Anomalies (96)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This 2' x 4' gravity anomaly grid for Alaska is NOT the input data set used in development of the GEOID96 model. This gravity grid models the 1.1 million terrestrial...

  12. A Methodological Overview on Anomaly Detection

    NARCIS (Netherlands)

    Callegari, C.; Coluccia, A.; D'Alconzo, A.; Ellens, W.; Giordano, S.; Mandjes, M.; Pagano, P.; Pepe, T.; Ricciato, F.; Żuraniewski, P.; Biersack, E.; Callegari, C.; Matijasevic, M.

    2013-01-01

    In this Chapter we give an overview of statistical methods for anomaly detection (AD), thereby targeting an audience of practitioners with general knowledge of statistics. We focus on the applicability of the methods by stating and comparing the conditions in which they can be applied and by discuss

  13. A methodological overview on anomaly detection

    NARCIS (Netherlands)

    Callegari, C.; Coluccia, A.; D'alconzo, A.; Ellens, W.; Giordano, S.; Mandjes, M.; Pagano, M.; Pepe, T.; Ricciato, F.; Zuraniewski, P.W.

    2013-01-01

    In this Chapter we give an overview of statistical methods for anomaly detection (AD), thereby targeting an audience of practitioners with general knowledge of statistics. We focus on the applicability of the methods by stating and comparing the conditions in which they can be applied and by discuss

  14. Detection of cardiovascular anomalies: Hybrid systems approach

    KAUST Repository

    Ledezma, Fernando

    2012-06-06

    In this paper, we propose a hybrid interpretation of the cardiovascular system. Based on a model proposed by Simaan et al. (2009), we study the problem of detecting cardiovascular anomalies that can be caused by variations in some physiological parameters, using an observerbased approach. We present the first numerical results obtained. © 2012 IFAC.

  15. Seasonality of Congenital Anomalies in Europe

    NARCIS (Netherlands)

    Luteijn, Johannes Michiel; Dolk, Helen; Addor, Marie-Claude; Arriola, Larraitz; Barisic, Ingeborg; Bianchi, Fabrizio; Calzolari, Elisa; Draper, Elizabeth; Garne, Ester; Gatt, Miriam; Haeusler, Martin; Khoshnood, Babak; McDonnell, Bob; Nelen, Vera; O'Mahony, Mary; Mullaney, Carmel; Queisser-Luft, Annette; Rankin, Judith; Tucker, David; Verellen-Dumoulin, Christine; de Walle, Hermien; Yevtushok, Lyubov

    2014-01-01

    BackgroundThis study describes seasonality of congenital anomalies in Europe to provide a baseline against which to assess the impact of specific time varying exposures such as the H1N1 pandemic influenza, and to provide a comprehensive and recent picture of seasonality and its possible relation to

  16. Psychoeducational Implications of Sex Chromosome Anomalies

    Science.gov (United States)

    Wodrich, David L.; Tarbox, Jennifer

    2008-01-01

    Numerous anomalies involving the sex chromosomes (X or Y) have been documented and their impact on development, learning, and behavior studied. This article reviews three of these disorders, Turner syndrome, Klinefelter syndrome, and Lesch-Nyhan disease. Each of these three is associated with one or more selective impairments or behavioral…

  17. Conformal Anomaly and Counterterms in Designer Gravity

    CERN Document Server

    Anabalon, Andres; Choque, David; Martinez, Cristian

    2015-01-01

    We construct concrete counterterms of the Balasubramanian-Kraus type for Einstein-scalar theories with designer gravity boundary conditions in AdS$_{4}$, so that the total action is finite on-shell and satisfy a well defined variational principle for an arbitrary scalar field potential. We focus on scalar fields with the conformal mass, $m^{2}=-2l^{-2}$, and show that the holographic mass matches the Hamiltonian mass for any boundary conditions. We compute the conformal anomaly of the dual field theory in the generic case, as well as when there exist logarithmic branches of non-linear origin. As expected, the conformal anomaly vanishes for the boundary conditions that are AdS invariant. When the anomaly does not vanish, the dual stress tensor describes a thermal gas with an equation of state related to the boundary conditions of the scalar field. When the anomaly vanishes, we recover the dual theory of a massless thermal gas. As an application of the formalism, we consider a general family of exact hairy blac...

  18. Congenital spine anomalies: the closed spinal dysraphisms

    Energy Technology Data Exchange (ETDEWEB)

    Schwartz, Erin Simon [University of Pennsylvania, Department of Radiology, The Children' s Hospital of Philadelphia, Perelman School of Medicine, Philadelphia, PA (United States); Rossi, Andrea [G. Gaslini Children' s Hospital, Department of Radiology, Genoa (Italy)

    2015-09-15

    The term congenital spinal anomalies encompasses a wide variety of dysmorphology that occurs during early development. Familiarity with current terminology and a practical, clinico-radiologic classification system allows the radiologist to have a more complete understanding of malformations of the spine and improves accuracy of diagnosis when these entities are encountered in practice. (orig.)

  19. Anomaly Detection using the "Isolation Forest" algorithm

    CERN Document Server

    CERN. Geneva

    2015-01-01

    Anomaly detection can provide clues about an outlying minority class in your data: hackers in a set of network events, fraudsters in a set of credit card transactions, or exotic particles in a set of high-energy collisions. In this talk, we analyze a real dataset of breast tissue biopsies, with malignant results forming the minority class. The "Isolation Forest" algorithm finds anomalies by deliberately “overfitting” models that memorize each data point. Since outliers have more empty space around them, they take fewer steps to memorize. Intuitively, a house in the country can be identified simply as “that house out by the farm”, while a house in the city needs a longer description like “that house in Brooklyn, near Prospect Park, on Union Street, between the firehouse and the library, not far from the French restaurant”. We first use anomaly detection to find outliers in the biopsy data, then apply traditional predictive modeling to discover rules that separate anomalies from normal data...

  20. A natural origin for the LHCb anomalies

    Science.gov (United States)

    Megías, Eugenio; Panico, Giuliano; Pujolàs, Oriol; Quirós, Mariano

    2016-09-01

    The anomalies recently found by the LHCb collaboration in B-meson decays seem to point towards the existence of new physics coupled non-universally to muons and electrons. We show that a beyond-the-Standard-Model dynamics with these features naturally arises in models with a warped extra-dimension that aim to solve the electroweak Hierarchy Problem. The attractiveness of our set-up is the fact that the dynamics responsible for generating the flavor anomalies is automatically present, being provided by the massive Kaluza-Klein excitations of the electroweak gauge bosons. The flavor anomalies can be easily reproduced by assuming that the bottom and muon fields have a sizable amount of compositeness, while the electron is almost elementary. Interestingly enough, this framework correlates the flavor anomalies to a pattern of corrections in the electroweak observables and in flavor-changing processes. In particular the deviations in the bottom and muon couplings to the Z-boson and in Δ F = 2 flavor-changing observables are predicted to be close to the present experimental bounds, and thus potentially testable in near-future experiments.

  1. Contextual Detection of Anomalies within Hyperspectral Images

    Science.gov (United States)

    2011-03-01

    Hyperspectral Imagery (HSI), Unsupervised Target Detection, Target Identification, Contextual Anomaly Detection 16. SECURITY CLASSIFICATION OF: 17. LIMITATION...processing. Hyperspectral imaging has a wide range of applications within remote sensing, not limited to terrain classification , environmental monitoring...Johnson, R. J. (2008). Improved feature extraction, feature selection, and identification techniques that create a fast unsupervised hyperspectral

  2. Reducing customer minutes lost by anomaly detection?

    NARCIS (Netherlands)

    Bakker, M.; Vreeburg, J.H.G.; Rietveld, L.C.; van der Roer, M.

    2012-01-01

    An method which compares measured and predicted water demands to detect anomalies, was developed and tested on three data sets of water demand of three years in which and 25 pipe bursts were reported. The method proved to be able to detect bursts where the water loss exceeds 30% of the average water

  3. Psychoeducational Implications of Sex Chromosome Anomalies

    Science.gov (United States)

    Wodrich, David L.; Tarbox, Jennifer

    2008-01-01

    Numerous anomalies involving the sex chromosomes (X or Y) have been documented and their impact on development, learning, and behavior studied. This article reviews three of these disorders, Turner syndrome, Klinefelter syndrome, and Lesch-Nyhan disease. Each of these three is associated with one or more selective impairments or behavioral…

  4. Seasonality of Congenital Anomalies in Europe

    NARCIS (Netherlands)

    Luteijn, Johannes Michiel; Dolk, Helen; Addor, Marie-Claude; Arriola, Larraitz; Barisic, Ingeborg; Bianchi, Fabrizio; Calzolari, Elisa; Draper, Elizabeth; Garne, Ester; Gatt, Miriam; Haeusler, Martin; Khoshnood, Babak; McDonnell, Bob; Nelen, Vera; O'Mahony, Mary; Mullaney, Carmel; Queisser-Luft, Annette; Rankin, Judith; Tucker, David; Verellen-Dumoulin, Christine; de Walle, Hermien; Yevtushok, Lyubov

    BackgroundThis study describes seasonality of congenital anomalies in Europe to provide a baseline against which to assess the impact of specific time varying exposures such as the H1N1 pandemic influenza, and to provide a comprehensive and recent picture of seasonality and its possible relation to

  5. Drug safety in pregnancy - monitoring congenital anomalies

    NARCIS (Netherlands)

    Morgan, Margery; De Jong-Van Den Berg, Lolkje T. W.; Jordan, Sue

    Aim This paper outlines research into the causes of congenital anomalies, and introduces a pan-European study. The potential roles of nurses and midwives in this area are illustrated by a case report. Background Since the thalidomide disaster, use of drugs in pregnancy has been carefully monitored

  6. Supercurrent anomalies in 4d SCFTs

    Science.gov (United States)

    Papadimitriou, Ioannis

    2017-07-01

    We use holographic renormalization of minimal N=2 gauged supergravity in order to derive the general form of the quantum Ward identities for 3d N=2 and 4d N=1 superconformal theories on general curved backgrounds, including an arbitrary fermionic source for the supercurrent. The Ward identities for 4d N=1 theories contain both bosonic and fermionic global anomalies, which we determine explicitly up to quadratic order in the supercurrent source. The Ward identities we derive apply to any superconformal theory, independently of whether it admits a holographic dual, except for the specific values of the a and c anomaly coefficients, which are equal due to our starting point of a two-derivative bulk supergravity theory. We show that the fermionic anomalies lead to an anomalous transformation of the supercurrent under rigid supersymmetry on backgrounds admitting Killing spinors, even if all superconformal anomalies are numerically zero on such backgrounds. The anomalous transformation of the supercurrent under rigid supersymmetry leads to an obstruction to the Q-exactness of the stress tensor in supersymmetric vacua, and may have implications for the applicability of localization techniques. We use this obstruction to the Q-exactness of the stress tensor, together with the Ward identities, in order to determine the general form of the stress tensor and R-current one-point functions in supersymmetric vacua, which allows us to obtain general expressions for the supersymmetric Casimir charges and partition function.

  7. Drug safety in pregnancy - monitoring congenital anomalies

    NARCIS (Netherlands)

    Morgan, Margery; De Jong-Van Den Berg, Lolkje T. W.; Jordan, Sue

    2011-01-01

    Aim This paper outlines research into the causes of congenital anomalies, and introduces a pan-European study. The potential roles of nurses and midwives in this area are illustrated by a case report. Background Since the thalidomide disaster, use of drugs in pregnancy has been carefully monitored t

  8. PROBLEMA ANOMALI DALAM INITIAL PUBLIC OFFERING (IPO

    Directory of Open Access Journals (Sweden)

    Sautma Ronni Basana

    2003-01-01

    Full Text Available This study on Initial Public Offerings (IPO showed that IPO stocks on average were underpriced, underperformed in the long run aftermarket and the Hot and Cold market cycle was present. These phenomenom can be explained by among others, the following: Asymetric Information, Winner's Curse, Traditional-Ibbotson, and Signalling Equilibrium Phenomenom. However, all of these can't give a satisfactory explanation because they were based on the price which existed on the secondary market (Underpriced Theory. The Withdrawn IPO (WIPO theory tried to explain the IPO anomaly differently so that the IPO anomaly could be explained clearly. Abstract in Bahasa Indonesia : Studi tentang Penawaran Saham Perdana (IPO menunjukkan saham-saham IPO secara rata-rata mengalami Underpriced, kinerja jangka panjang yang jelek dan adanya siklus pasar "Hot" dan "Cold". Ada beberapa penjelasan terhadap fenomena tersebut, antara lain: Informasi Asimetri, WinnerCurse, Tradisional-Ibbotson, Signaling Equilibrium Phenomenom tetapi semuanya belum memuaskan karena berdasarkan pada basis harga yang ada di pasar sekunder (Teori Underpriced. Teori Withdrawn IPO (WIPO mencoba menjelaskan fenomena anomali IPO dengan cara yang berbeda sehingga fenomena anomali IPO dapat dijelaskan secara tuntas. Kata kunci: Penawaran Saham Perdana (IPO, Underpriced, Withdrawn IPO (WIPO.

  9. Congenital cardiac anomalies in an English bulldog.

    Science.gov (United States)

    McConkey, Marina J

    2011-11-01

    A 4-year-old male castrated English bulldog was referred to the Atlantic Veterinary College for evaluation of exercise intolerance, multiple syncopal episodes, and a grade IV/VI heart murmur. The dog was shown to have 3 congenital cardiac anomalies: atrial septal defect, mitral valve dysplasia, and subaortic stenosis. Medical management consisted of exercise restriction, atenolol, pimobendan, and taurine.

  10. Chromosomal anomalies: The experience of the Congenital Anomalies Registry of the Valencia Region

    National Research Council Canada - National Science Library

    Gimeno-Martos, S; Cavero-Carbonell, C; López-Maside, A; Bosch-Sánchez, S; Martos-Jiménez, C; Zurriaga, O

    2016-01-01

    ...) in the Valencia Region, in less than one year olds, during the period 2007-2011. Live births, still births and termination of pregnancy due to foetal anomaly between 2007 and 2011 with chromosomal CA...

  11. Orbital debris hazard insights from spacecraft anomalies studies

    Science.gov (United States)

    McKnight, Darren S.

    2016-09-01

    Since the dawning of the space age space operators have been tallying spacecraft anomalies and failures then using these insights to improve the space systems and operations. As space systems improved and their lifetimes increased, the anomaly and failure modes have multiplied. Primary triggers for space anomalies and failures include design issues, space environmental effects, and satellite operations. Attempts to correlate anomalies to the orbital debris environment have started as early as the mid-1990's. Early attempts showed tens of anomalies correlated well to altitudes where the cataloged debris population was the highest. However, due to the complexity of tracing debris impacts to mission anomalies, these analyses were found to be insufficient to prove causation. After the fragmentation of the Chinese Feng-Yun satellite in 2007, it was hypothesized that the nontrackable fragments causing anomalies in LEO would have increased significantly from this event. As a result, debris-induced anomalies should have gone up measurably in the vicinity of this breakup. Again, the analysis provided some subtle evidence of debris-induced anomalies but it was not convincing. The continued difficulty in linking debris flux to satellite anomalies and failures prompted the creation of a series of spacecraft anomalies and failure workshops to investigate the identified shortfalls. These gatherings have produced insights into why this process is not straightforward. Summaries of these studies and workshops are presented and observations made about how to create solutions for anomaly attribution, especially as it relates to debris-induced spacecraft anomalies and failures.

  12. Isostatic residual gravity anomaly data grid for the conterminous US

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The grid of isostatic residual gravity anomaly data was produced from the grid of Bouguer gravity anomaly data (see Bouguer gravity metadata) by using an...

  13. Radiological evaluation congenital gastrointestinal tract anomalies

    Energy Technology Data Exchange (ETDEWEB)

    Cho, Young Hee; Kim, Ock [Hanil Hospital, Seoul (Korea, Republic of); Jang, Jung Wha [Seoul Nationl Hospital, Seoul (Korea, Republic of)

    1983-06-15

    With the improvements, during recent years, in the control of the infections and nutritional diseases the subject of congenital malformation becomes of increasing importance. The radiologic signs are crucial for prompt diagnosis of anomalies of alimentary tract and with early identification of resulting complication, surgical therapy is usually life-saving. 30 cases of congenital anomalies of alimentary tract in infants were reviewed in respect of age, sex, incidence and radiological findings. The results are summarized as follows; 1, The most common lesion was hypertrophic pyloric stenosis, followed by congenital megacolon and anorectal anomaly, tracheoesophageal fistula, intestinal atresia. 2. Male outnumbered female in most congenital anomalies of alimentary tract. 25 cases were under the age of 1 month. 3. Common symptoms of upper gastrointestinal tract obstruction are vomiting and abdominal distension. In the obstruction of lower gastrointestinal tract, abdominal distension and failure of meconium passage were noted. 4. Roentgenologic findings were as follows, a. Chest A-P and lateral view: In tracheoesophageal fistula, saccular dilatation of upper esophagus and displacement of trachea anterolaterally were the most common finding. b. Simple abdomen: Obstructive pattern of proximal portion of duodenum shows in 11 cases, of distal bowel shows in 16 cases. Duodenal atresia showed 'double bubble' sign, hypertrophic pyloric stenosis showed marked gastric distension, paucity of air in small bowel and increases gastric peristalsis were the most common findings. Hirschsprung's disease showed absenced of rectal gas almostly. The variable length between blind hindgut to anus was seen in anorectal anomalies. c. Esophagogram: Blind sac of upper esophagus was seen at the 4th thoracic spinal level and displacement of trachea anterolaterally. 1 case of tracheoesophageal fistula had an intact esophageal lumen. d. Upper G-I series: In hypertrophic pyloric

  14. A critical appraisal of the LSND anomaly

    CERN Document Server

    Boyko, I

    2008-01-01

    The so-called 'LSND anomaly', a 3.8 sigma excess of anti-nu_e events interpreted as originating from anti-nu_mu -> anti-nu_e oscillation, gave rise to many theoretical speculations. The MiniBooNE Collaboration reported inconsistency of this interpretation with the findings from their search for nu_mu -> nu_e oscillations. Yet the origin of the LSND anomaly was never clarified. A critical issue is the prediction of the background anti-nu_e flux that was used in the analysis of the LSND experiment. For this, decisive input comes from pion spectra measured with the HARP large-angle spectrometer under conditions that closely resemble the LSND situation: a proton beam with 800 MeV kinetic energy hitting a water target.

  15. Conformal anomaly around the sudden singularity

    CERN Document Server

    Houndjo, S J M

    2010-01-01

    Quantum effects due to particle creation on a classical sudden singularity have been investigated in a previous work. The conclusion was that quantum effects do not lead to the avoidance nor the modification of the sudden future singularity. In this paper, we investigate quantum corrections coming from conformal anomaly near the sudden future singularity. We conclude that when the equation of state is chosen to be $p=-\\rho-A\\rho^\\alpha$, the conformal anomaly can transform the sudden singularity in the singularity of type III for any $\\alpha> 1/2$ and in the singularity of the type I (the big rip) or the big crunch for $1/2<\\alpha<3/2$.

  16. Conformal anomaly around the sudden singularity

    Science.gov (United States)

    Houndjo, S. J. M.

    2010-10-01

    Quantum effects due to particle creation on a classical sudden singularity have been investigated in a previous work. The conclusion was that quantum effects do not lead to the avoidance nor the modification of the sudden future singularity. In this paper, we investigate quantum corrections coming from conformal anomaly near the sudden future singularity. We conclude that when the equation of state is chosen to be p=-ρ-Aρα, the conformal anomaly can transform the sudden singularity into the singularity of type III for any α>1/2 and into the singularity of the type I (the big rip) or the big crunch for 1/2<α<3/2.

  17. The GSI Time Anomaly: Facts and Fiction

    Energy Technology Data Exchange (ETDEWEB)

    Giunti, Carlo [INFN, Sezione di Torino, Via P. Giuria 1, I-10125 Torino (Italy)

    2009-03-15

    The claims that the GSI time anomaly is due to the mixing of neutrinos in the final state of the observed electron-capture processes are refuted. With the help of an analogy with a double-slit experiment, it is shown that the standard method of calculation of the rate of an interaction process by adding the rates of production of all the allowed final states, regardless of a possible coherence among them, is correct. It is a consequence of causality. It is shown that the GSI time anomaly may be caused by quantum beats due to the existence of two coherent energy levels of the decaying ion with an extremely small energy splitting (about 6x10{sup -16} eV) and relative probabilities having a ratio of about 1/99.

  18. LHCb anomalies from a natural perspective

    CERN Document Server

    García García, Isabel

    2016-01-01

    Tension between the Standard Model (SM) and data concerning $b \\rightarrow s$ processes has become apparent. Most notoriously, concerning the $R_K$ ratio, which probes lepton non-universality in $b$ decays, and measurements involving the decays $B \\rightarrow K^* \\mu^+ \\mu^-$ and $B_s \\rightarrow \\phi \\mu^+ \\mu^-$. Careful analysis of a wide range of $b \\rightarrow s$ data shows that certain kinds of new physics can significantly ameliorate agreement with experiment. Here, we show that these $b \\rightarrow s$ anomalies can be naturally accommodated in the context of Natural Scherk-Schwarz Theories of the Weak Scale -- a class of models designed to address the hierarchy problem. No extra states need to be introduced in order to accommodate these anomalies, and the assumptions required regarding flavor violating couplings are very mild. Moreover, the structure of the theory makes sharp predictions regarding $B$ meson decays into final states including $\\tau^+ \\tau^-$ pairs, which will provide a future test of t...

  19. Do retractile testes have anatomical anomalies?

    Science.gov (United States)

    Anderson, Kleber M.; Costa, Suelen F.; Sampaio, Francisco J.B.; Favorito, Luciano A.

    2016-01-01

    ABSTRACT Objectives: To assess the incidence of anatomical anomalies in patients with retractile testis. Materials and Methods: We studied prospectively 20 patients (28 testes) with truly retractile testis and compared them with 25 human fetuses (50 testes) with testis in scrotal position. We analyzed the relations among the testis, epididymis and patency of the processus vaginalis (PV). To analyze the relations between the testis and epididymis, we used a previous classification according to epididymis attachment to the testis and the presence of epididymis atresia. To analyze the structure of the PV, we considered two situations: obliteration of the PV and patency of the PV. We used the Chi-square test for contingency analysis of the populations under study (p patent processus vaginalis and epididymal anomalies. PMID:27564294

  20. Coronary artery anomalies in Turner Syndrome

    DEFF Research Database (Denmark)

    Viuff, Mette H; Trolle, Christian; Wen, Jan;

    2016-01-01

    BACKGROUND: Congenital heart disease, primarily involving the left-sided structures, is often seen in patients with Turner Syndrome. Moreover, a few case reports have indicated that coronary anomalies may be more prevalent in Turner Syndrome than in the normal population. We therefore set out...... to systematically investigate coronary arterial anatomy by computed tomographic coronary angiography (coronary CTA) in Turner Syndrome patients. METHODS: Fifty consecutive women with Turner Syndrome (mean age 47 years [17-71]) underwent coronary CTA. Patients were compared with 25 gender-matched controls. RESULTS......: Coronary anomaly was more frequent in patients with Turner Syndrome than in healthy controls [20% vs. 4% (p = 0.043)]. Nine out of ten abnormal cases had an anomalous left coronary artery anatomy (absent left main trunk, n = 7; circumflex artery originating from the right aortic sinus, n = 2). One case had...

  1. Network Anomaly Detection Based on Wavelet Analysis

    Directory of Open Access Journals (Sweden)

    Ali A. Ghorbani

    2008-11-01

    Full Text Available Signal processing techniques have been applied recently for analyzing and detecting network anomalies due to their potential to find novel or unknown intrusions. In this paper, we propose a new network signal modelling technique for detecting network anomalies, combining the wavelet approximation and system identification theory. In order to characterize network traffic behaviors, we present fifteen features and use them as the input signals in our system. We then evaluate our approach with the 1999 DARPA intrusion detection dataset and conduct a comprehensive analysis of the intrusions in the dataset. Evaluation results show that the approach achieves high-detection rates in terms of both attack instances and attack types. Furthermore, we conduct a full day's evaluation in a real large-scale WiFi ISP network where five attack types are successfully detected from over 30 millions flows.

  2. Neutrino Anomalies in an Extended Zee Model

    CERN Document Server

    Joshipura, A S; Joshipura, Anjan S.; Rindani, Saurabh D.

    1999-01-01

    We discuss an extended SU(2)X U(1) model which naturally leads to mass scales and mixing angles relevant for understanding both the solar and atmospheric neutrino anomalies. No right-handed neutrinos are introduced in the model.The model uses a softly broken L_e-L_{\\mu}-L_{\\tau} symmetry. Neutrino masses arise only at the loop level. The one-loop neutrino masses which arise as in the Zee model solve the atmospheric neutrino anomaly while breaking of L_e-L_{\\mu}-L_{\\tau} generates at two-loop order a mass splitting needed for the vacuum solution of the solar neutrino problem. A somewhat different model is possible which accommodates the large-angle MSW resolution of the solar neutrino problem.

  3. Axial Vector $Z'$ and Anomaly Cancellation

    CERN Document Server

    Ismail, Ahmed; Tsao, Kuo-Hsing; Unwin, James

    2016-01-01

    Whilst the prospect of new $Z'$ gauge bosons with only axial couplings to the Standard Model (SM) fermions is widely discussed, examples of anomaly-free renormalisable models are lacking in the literature. We look to remedy this by constructing several motivated examples. Specifically, we consider axial vectors which couple universally to all SM fermions, as well as those which are generation-specific, leptophilic, and leptophobic. Anomaly cancellation typically requires the presence of new coloured and charged chiral fermions, and we argue that the masses of these new states must generally be comparable to that of the axial vector. Finally, an axial vector mediator could provide a portal between SM and hidden sector states, and we also consider the possibility that the axial vector couples to dark matter. If the dark matter relic density is set due to freeze-out via the axial vector, this strongly constrains the parameter space.

  4. Footprints of New Strong Dynamics via Anomaly

    CERN Document Server

    Nakai, Yuichiro; Tobioka, Kohsaku

    2015-01-01

    Chiral anomaly provides a smoking-gun evidence of a new confining gauge theory. Motivated by a reported event excess in diphoton invariant mass distribution at the LHC, we discuss a scenario that a pseudo-Nambu-Goldstone (pNG) boson of a new QCD-like theory is produced by gluon fusion and decays into a pair of the standard model gauge bosons. Despite the strong dynamics, the production cross section and the decay widths are determined by anomaly matching condition. The excess can be explained by the pNG boson with mass of around 750 GeV. The model also predicts exotic hadrons such as a color octet scalar and baryons which are within the reach of the LHC experiment.

  5. Axial vector Z‧ and anomaly cancellation

    Science.gov (United States)

    Ismail, Ahmed; Keung, Wai-Yee; Tsao, Kuo-Hsing; Unwin, James

    2017-05-01

    Whilst the prospect of new Z‧ gauge bosons with only axial couplings to the Standard Model (SM) fermions is widely discussed, examples of anomaly-free renormalisable models are lacking in the literature. We look to remedy this by constructing several motivated examples. Specifically, we consider axial vectors which couple universally to all SM fermions, as well as those which are generation-specific, leptophilic, and leptophobic. Anomaly cancellation typically requires the presence of new coloured and charged chiral fermions, and we argue that in a large class of models masses of these new states are expected to be comparable to that of the axial vector. Finally, an axial vector mediator could provide a portal between SM and hidden sector states, and we also consider the possibility that the axial vector couples to dark matter. If the dark matter relic density is set due to freeze-out via the axial vector, this strongly constrains the parameter space.

  6. Spectrum of congenital anomalies in pregnancies with pregestational diabetes

    NARCIS (Netherlands)

    Garne, Ester; Loane, Maria; Dolk, Helen; Barisic, Ingeborg; Addor, Marie-Claude; Arriola, Larraitz; Bakker, Marian; Calzolari, Elisa; Dias, Carlos Matias; Doray, Berenice; Gatt, Miriam; Melve, Kari Klyungsoyr; Nelen, Vera; O'Mahony, Mary; Pierini, Anna; Randrianaivo-Ranjatoelina, Hanitra; Rankin, Judith; Rissmann, Anke; Tucker, David; Verellun-Dumoulin, Christine; Wiesel, Awi

    2012-01-01

    BACKGROUND Maternal pregestational diabetes is a well-known risk factor for congenital anomalies. This study analyses the spectrum of congenital anomalies associated with maternal diabetes using data from a large European database for the population-based surveillance of congenital anomalies. METHOD

  7. Morning glory disc anomaly with Chiari type I malformation.

    Science.gov (United States)

    Arlow, Tim; Arepalli, Sruthi; Flanders, Adam E; Shields, Carol L

    2014-04-30

    Morning glory disc anomaly is a rare optic nerve dysplasia associated with various neovascular abnormalities. Due to these associations, children with morning glory disc anomaly have brain imaging and angiography to detect other congenital defects. The authors report the case of an infant with morning glory disc anomaly and coexisting Chiari type I malformation.

  8. Spectrum of congenital anomalies in pregnancies with pregestational diabetes

    DEFF Research Database (Denmark)

    Garne, Ester; Loane, Maria; Dolk, Helen;

    2012-01-01

    Maternal pregestational diabetes is a well-known risk factor for congenital anomalies. This study analyses the spectrum of congenital anomalies associated with maternal diabetes using data from a large European database for the population-based surveillance of congenital anomalies....

  9. Minor Physical Anomalies, Footprints, and Behavior: Was the Buddha Right?

    Science.gov (United States)

    Draper, Thomas W.; Munoz, Milagros M.

    1982-01-01

    A relationship between an anomaly of the footprint suggested by ancient Abhidhamma meditations and Minor Physical Anomalies Scale was observed in children. The footprint anomalies correlated with the activity levels of children in the same way as the scores on the scale and consistently with prior research using the scale. (Author/RD)

  10. Cosmological anomalies and exotic smoothness structures

    OpenAIRE

    Asselmeyer-Maluga, Torsten; Brans, Carl H.

    2001-01-01

    It seems to be generally accepted that apparently anomalous cosmological observations, such as accelerating expansion, etc., necessarily are inconsistent with standard general relativity and standard matter sources. Following the suggestions of S{\\l}adkowski, we point out that in addition to exotic theories and exotic matter there is another possibility. We refer to exotic differential structures on ${\\mathbb R}^4$ which could be the source of the observed anomalies without changing the Einst...

  11. Horseshoe Appendix: An Extremely Rare Appendiceal Anomaly.

    Science.gov (United States)

    Singh, Ch Gyan; Nyuwi, Kuotho T; Rangaswamy, Raju; Ezung, Yibenthung S; Singh, H Manihar

    2016-03-01

    Appendiceal anomalies are extremely rare malformations that are usually found incidentally. Agenesis and duplication of the appendix has been well documented however, the cases of horseshoe appendix reported is very limited, only four cases reported so far. Here, we report a four and half-year-old who underwent interval appendectomy. Intraoperatively both the ends of the appendix were found to be communicating with the cecum with two separate base or stump located at a sagital disposal- the so called "horseshoe appendix".

  12. Resolution of the solar neutrino anomaly

    CERN Document Server

    Dubin, M; Dubin, Maurice; Soberman, Robert K

    1996-01-01

    The solar neutrino anomaly, measurements discrepant from predictions of the Standard Solar Model, has existed for over 30 years. Multiple experiments measuring fluxes from several reactions in the hydrogen fusion chain have added to the puzzle. Each of the several elements of the enigma are resolved by recognition of measurements establishing that most of the sun's fusion must occur near the surface rather than the core.

  13. Magnetic Anomaly Detection by Remote Means

    Science.gov (United States)

    2016-09-21

    effort we have demonstrated the detection of Xe using the remote Radar REMPI technique and the excitation of Xe atoms remotely using UV laser pulses...unlimited. 13. SUPPLEMENTARY NOTES 14. ABSTRACT Research on the possibility of detecting magnetic anomalies remotely using laser excitation of a... using laser excitation of a naturally occurring atomic or molecular species in air has focused on the use of Xe129. Although Xe129 is only present in

  14. Casimir Effect, Hawking Radiation and Trace Anomaly

    CERN Document Server

    Setare, M R

    2001-01-01

    The Casimir energy for massless scalar field of two parallel conductor, in two dimensional Schwarzchild black hole background, with Dirichlet boundary conditions is calculated by making use of general properties of renormalized stress tensor. We show that vacuum expectation value of stress tensor can be obtain by Casimir effect, trace anomaly and Hawking radiation. Four-dimensional of this problem, by this method, is under progress by this author.

  15. Electromagnetic duality anomaly in curved spacetimes

    CERN Document Server

    Agullo, I; Navarro-Salas, J

    2016-01-01

    The source-free Maxwell action is invariant under electric-magnetic duality rotations in arbitrary spacetimes. This leads to a conserved classical Noether charge. We show that this conservation law is broken at the quantum level in presence of a background classical gravitational field with a non-trivial Chern-Pontryagin invariant, in a parallel way to the chiral anomaly for massless Dirac fermions. Among the physical consequences, the net polarization of the quantum electromagnetic field is not conserved.

  16. Anomaly induced effects in a magnetic field

    OpenAIRE

    Antoniadis, Ignatios; Boyarsky, Alexey; Ruchayskiy, Oleg

    2007-01-01

    We consider a modification of electrodynamics by an additional light massive vector field, interacting with the photon via Chern-Simons-like coupling. This theory predicts observable effects for the experiments studying the propagation of light in an external magnetic field, very similar to those, predicted by theories of axion and axion-like particles. We discuss a possible microscopic origin of this theory from a theory with non-trivial gauge anomaly cancellation between massive and light p...

  17. OPAD data analysis. [Optical Plumes Anomaly Detection

    Science.gov (United States)

    Buntine, Wray L.; Kraft, Richard; Whitaker, Kevin; Cooper, Anita E.; Powers, W. T.; Wallace, Tim L.

    1993-01-01

    Data obtained in the framework of an Optical Plume Anomaly Detection (OPAD) program intended to create a rocket engine health monitor based on spectrometric detections of anomalous atomic and molecular species in the exhaust plume are analyzed. The major results include techniques for handling data noise, methods for registration of spectra to wavelength, and a simple automatic process for estimating the metallic component of a spectrum.

  18. Unsupervised Topic Discovery by Anomaly Detection

    Science.gov (United States)

    2013-09-01

    anomalous. 7 c. Support Vector Machines SVM was first introduced by Cortes and Vapnik [9], and it was used to detect anomalies in a single class...into a single file to be consumed by the LDA program. 2. Whitepaper posted on Facebook The population whitepaper posted on Facebook talks about...It talks about the importance of marriage and parenthood and the measures taken by the government to encourage parenthood . It addresses unpopular

  19. Dispersive Approach to the Trace Anomaly

    OpenAIRE

    Kawka, N.; Teryaev, O. V.; Veretin, O.L.

    1997-01-01

    In the scalar $\\phi^4$ field model the dispersive approach to the trace anomaly is proposed. It is shown that it is impossible to get dispersion representation for all formfactors so that preserve both the translation and dilatation Ward identities. Subtractions which preserve energy-momentum conservation violate the classical trace Ward--Takahashi identity and give rise to an anomalous contribution to the matrix element of stress tensor $\\theta_\\mu^\

  20. Reasoning Anomalies Associated With Delusions in Schizophrenia

    OpenAIRE

    Langdon, Robyn; Ward, Philip B.; Coltheart, Max

    2008-01-01

    Deluded people differ from nondeluded controls on attributional style questionnaires and probabilistic-reasoning and theory-of-mind (ToM) tasks. No study to date has examined the relations between these 3 reasoning anomalies in the same individuals so as to evaluate their functional independence and potentially inform theories of delusion formation. We did so in 35 schizophrenic patients with a history of delusions, 30 of whom were currently deluded, and 34 healthy controls. Compared with hea...

  1. Anomaly Detection and Attribution Using Bayesian Networks

    Science.gov (United States)

    2014-06-01

    UNCLASSIFIED Anomaly Detection and Attribution Using Bayesian Networks Andrew Kirk, Jonathan Legg and Edwin El-Mahassni National Security and...detection in Bayesian networks , en- abling both the detection and explanation of anomalous cases in a dataset. By exploiting the structure of a... Bayesian network , our algorithm is able to efficiently search for local maxima of data conflict between closely related vari- ables. Benchmark tests using

  2. Thermal expansion anomaly regulated by entropy.

    Science.gov (United States)

    Liu, Zi-Kui; Wang, Yi; Shang, ShunLi

    2014-11-13

    Thermal expansion, defined as the temperature dependence of volume under constant pressure, is a common phenomenon in nature and originates from anharmonic lattice dynamics. However, it has been poorly understood how thermal expansion can show anomalies such as colossal positive, zero, or negative thermal expansion (CPTE, ZTE, or NTE), especially in quantitative terms. Here we show that changes in configurational entropy due to metastable micro(scopic)states can lead to quantitative prediction of these anomalies. We integrate the Maxwell relation, statistic mechanics, and first-principles calculations to demonstrate that when the entropy is increased by pressure, NTE occurs such as in Invar alloy (Fe3Pt, for example), silicon, ice, and water, and when the entropy is decreased dramatically by pressure, CPTE is expected such as in anti-Invar cerium, ice and water. Our findings provide a theoretic framework to understand and predict a broad range of anomalies in nature in addition to thermal expansion, which may include gigantic electrocaloric and electromechanical responses, anomalously reduced thermal conductivity, and spin distributions.

  3. Congenital anomalies and proximity to landfill sites.

    LENUS (Irish Health Repository)

    Boyle, E

    2004-01-01

    The occurrence of congenital anomalies in proximity to municipal landfill sites in the Eastern Region (counties Dublin, Kildare, Wicklow) was examined by small area (district electoral division), distance and clustering tendancies in relation to 83 landfills, five of which were major sites. The study included 2136 cases of congenital anomaly, 37,487 births and 1423 controls between 1986 and 1990. For the more populous areas of the region 50% of the population lived within 2-3 km of a landfill and within 4-5 km for more rural areas. In the area-level analysis, the standardised prevalence ratios, empirical and full Bayesian modelling, and Kulldorff\\'s spatial scan statistic found no association between the residential area of cases and location of landfills. In the case control analysis, the mean distance of cases and controls from the nearest landfill was similar. The odds ratios of cases compared to controls for increasing distances from all landfills and major landfills showed no significant difference from the baseline value of 1. The kernel and K methods showed no tendency of cases to cluster in relationship to landfills. In conclusion, congenital anomalies were not found to occur more commonly in proximity to municipal landfills.

  4. Conformal anomaly of super Wilson loop

    Energy Technology Data Exchange (ETDEWEB)

    Belitsky, A.V., E-mail: andrei.belitsky@asu.edu [Department of Physics, Arizona State University, Tempe, AZ 85287-1504 (United States)

    2012-09-11

    Classically supersymmetric Wilson loop on a null polygonal contour possesses all symmetries required to match it onto non-MHV amplitudes in maximally supersymmetric Yang-Mills theory. However, to define it quantum mechanically, one is forced to regularize it since perturbative loop diagrams are not well defined due to presence of ultraviolet divergences stemming from integration in the vicinity of the cusps. A regularization that is adopted by practitioners by allowing one to use spinor helicity formalism, on the one hand, and systematically go to higher orders of perturbation theory is based on a version of dimensional regularization, known as Four-Dimensional Helicity scheme. Recently it was demonstrated that its use for the super Wilson loop at one loop breaks both conformal symmetry and Poincare supersymmetry. Presently, we exhibit the origin for these effects and demonstrate how one can undo this breaking. The phenomenon is alike the one emerging in renormalization group mixing of conformal operators in conformal theories when one uses dimensional regularization. The rotation matrix to the diagonal basis is found by means of computing the anomaly in the Ward identity for the conformal boost. Presently, we apply this ideology to the super Wilson loop. We compute the one-loop conformal anomaly for the super Wilson loop and find that the anomaly depends on its Grassmann coordinates. By subtracting this anomalous contribution from the super Wilson loop we restore its interpretation as a dual description for reduced non-MHV amplitudes which are expressed in terms of superconformal invariants.

  5. Supersymmetry on curved spaces and superconformal anomalies

    CERN Document Server

    Cassani, Davide

    2013-01-01

    We study the consequences of unbroken rigid supersymmetry of four-dimensional field theories placed on curved manifolds. We show that in Lorentzian signature the background vector field coupling to the R-current is determined by the Weyl tensor of the background metric. In Euclidean signature, the same holds if two supercharges of opposite R-charge are preserved, otherwise the (anti-)self-dual part of the vector field-strength is fixed by the Weyl tensor. As a result of this relation, the trace and R-current anomalies of superconformal field theories simplify, with the trace anomaly becoming purely topological. In particular, in Lorentzian signature, or in the presence of two Euclidean supercharges of opposite R-charge, supersymmetry of the background implies that the term proportional to the central charge c vanishes, both in the trace and R-current anomalies. This is equivalent to the vanishing of a superspace Weyl invariant. We comment on the implications of our results for holography.

  6. Chiral anomaly and transport in Weyl metals

    Science.gov (United States)

    Burkov, A. A.

    2015-03-01

    We present an overview of our recent work on transport phenomena in Weyl metals, which may be connected to their nontrivial topological properties, particularly to chiral anomaly. We argue that there are two basic phenomena, which are related to chiral anomaly in Weyl metals: anomalous Hall effect (AHE) and chiral magnetic effect (CME). While AHE is in principle present in any ferromagnetic metal, we demonstrate that a magnetic Weyl metal is distinguished from an ordinary ferromagnetic metal by the absence of the extrinsic and the Fermi surface part of the intrinsic contributions to the AHE, as long as the Fermi energy is sufficiently close to the Weyl nodes. The AHE in a Weyl metal is thus shown to be a purely intrinsic, universal property, fully determined by the location of the Weyl nodes in the first Brillouin zone. In other words, a ferromagnetic Weyl metal may be thought of as the only example of a ferromagnetic metal with a purely intrinsic AHE. We further develop a fully microscopic theory of diffusive magnetotransport in Weyl metals. We derive coupled diffusion equations for the total and axial (i.e. node-antisymmetric) charge densities and show that chiral anomaly manifests as a magnetic-field-induced coupling between them. We demonstrate that an experimentally-observable consequence of CME in magnetotransport in Weyl metals is a quadratic negative magnetoresistance, which will dominate all other contributions to magnetoresistance under certain conditions and may be regarded as a smoking-gun transport characteristic, unique to Weyl metals.

  7. Calendar anomalies in the Ukrainian stock market

    Directory of Open Access Journals (Sweden)

    Guglielmo Maria Caporale

    2017-03-01

    Full Text Available This paper is a comprehensive investigation of calendar anomalies in the Ukrainian stock market. It employs various statistical techniques (average analysis, Student’s t-test, ANOVA, the Kruskal-Wallis test, and regression analysis with dummy variables and a trading simulation approach to test for the presence of the following anomalies: day-of-the-week effect; turn-of-the-month effect; turn-of-the-year effect; month-of-the-year effect; January effect; holiday effect; Halloween effect. The results suggest that in general calendar anomalies are not present in the Ukrainian stock market, but there are a few exceptions, i.e. the turn-of-the-year and Halloween effect for the PFTS index, and the month-of-the-year effect for UX futures. However, the trading simulation analysis shows that only trading strategies based on the turn-of-the-year effect for the PFTS index and the month-of-the-year effect for the UX futures can generate exploitable profit opportunities that can be interpreted as evidence against market efficiency.

  8. Identification of Geochemical Anomaly by Multifractal Analysis

    Institute of Scientific and Technical Information of China (English)

    Xie Shuyun; Cheng Qiuming; Ke Xianzhong; Bao Zhengyu; Wang Changming; Quan Haoli

    2008-01-01

    The separation of anomalies from geochemical background is an important part of data analysis because lack of such identifications might have profound influence on or even distort the final analysis results. In this article, 1 672 geochemical analytical data of 11 elements, including Cu, Mo, Ag, Sn, and others, from a region within Tibet, South China, are used as one example. Together with the traditional anomaly recognition method of using the iterative mean ±2σ, local multifractality theory has been utilized to delineate the ranges of geochemical anomalies of the elements. To different degrees, on the basis of original data mapping, C-A fractal analysis and singularity exponents, Sn differs from the other 10 elements. Moreover, geochemical mapping results based on values of the multifractal asymmetry index for all elements delineate the highly anomalous area. Similar to other 10 elements, the anomalous areas of Sn delineated by the asymmetry index distribute along the main structure orientations. According to the asymmetry indexes, the 11 elements could be classified into 3 groups: (1) Ag and Au, (2) As-Sb-Cu-Pb-Zn-Mo, and (3) Sn-Bi-W.This paragenetic association of elements can be used to interpret possible origins of mineralization, which is in agreement with petrological analysis and field survey results.

  9. Remark on the Consistent Gauge Anomaly in Supersymmetric Theories

    CERN Document Server

    Ohshima, Y; Suzuki, H; Yasuta, H; Ohshima, Yoshihisa; Okuyama, Kiyoshi; Suzuki, Hiroshi; Yasuta, Hirofumi

    1999-01-01

    We present a direct field theoretical calculation of the consistent gauge anomaly in the superfield formalism, on the basis of a definition of the effective action through the covariant gauge current. The scheme is conceptually and technically simple and the gauge covariance in intermediate steps reduces calculational labors considerably. The resultant superfield anomaly, being proportional to the anomaly $d^{abc}=\\tr T^a\\{T^b,T^c\\}$, is minimal even without supplementing any counterterms. Our anomaly coincides with the anomaly obtained by Marinkovi\\'c as the solution of the Wess-Zumino consistency condition.

  10. [Congenital anomalies of the central nervous system in autopsy specimens].

    Science.gov (United States)

    Sobaniec-Lotowska, M; Ostapiuk, H; Sulkowski, S; Sobaniec, W; Sulik, M; Famulski, W

    1989-02-01

    On the basis of an analysis of 2398 autopsies of infants aged up to 1 year in 194 cases congenital anomalies of the central nervous system were found (8.1%). Most cases of these anomalies were noted in the group of newborns (85%) and the most frequent anomalies were: myelomeningocele (35.6%), multiple anomalies (20.1%), congenital hydrocephalus (17%), anencephaly (14.4%) and corpus callosum malformations (3.6%). Myelomeningocele, congenital hydrocephalus, anencephaly and true microcephaly were more frequent in girls, while multiple anomalies and corpus callosum malformations were more frequent in boys.

  11. Network Traffic Anomalies Identification Based on Classification Methods

    Directory of Open Access Journals (Sweden)

    Donatas Račys

    2015-07-01

    Full Text Available A problem of network traffic anomalies detection in the computer networks is analyzed. Overview of anomalies detection methods is given then advantages and disadvantages of the different methods are analyzed. Model for the traffic anomalies detection was developed based on IBM SPSS Modeler and is used to analyze SNMP data of the router. Investigation of the traffic anomalies was done using three classification methods and different sets of the learning data. Based on the results of investigation it was determined that C5.1 decision tree method has the largest accuracy and performance and can be successfully used for identification of the network traffic anomalies.

  12. The dynamic Allan Variance IV: characterization of atomic clock anomalies.

    Science.gov (United States)

    Galleani, Lorenzo; Tavella, Patrizia

    2015-05-01

    The number of applications where precise clocks play a key role is steadily increasing, satellite navigation being the main example. Precise clock anomalies are hence critical events, and their characterization is a fundamental problem. When an anomaly occurs, the clock stability changes with time, and this variation can be characterized with the dynamic Allan variance (DAVAR). We obtain the DAVAR for a series of common clock anomalies, namely, a sinusoidal term, a phase jump, a frequency jump, and a sudden change in the clock noise variance. These anomalies are particularly common in space clocks. Our analytic results clarify how the clock stability changes during these anomalies.

  13. The Wald entropy and 6d conformal anomaly

    Directory of Open Access Journals (Sweden)

    Amin Faraji Astaneh

    2015-10-01

    Full Text Available We analyze the Wald entropy for different forms of the conformal anomaly in six dimensions. In particular we focus on the anomaly which arises in a holographic calculation of Henningson and Skenderis. The various presentations of the anomaly differ by some total derivative terms. We calculate the corresponding Wald entropy for surfaces which do not have an Abelian O(2 symmetry in the transverse direction although the extrinsic curvature vanishes. We demonstrate that for this class of surfaces the Wald entropy is different for different forms of the conformal anomaly. The difference is due to the total derivative terms present in the anomaly. We analyze the conformal invariance of the Wald entropy for the holographic conformal anomaly and demonstrate that the violation of the invariance is due to the contributions of the total derivative terms in the anomaly. Finally, we make more precise the general form for the Hung–Myers–Smolkin discrepancy.

  14. Band Iron Formations and Satellite Magnetic Anomalies

    Science.gov (United States)

    Nazarova, K. A.; Wasilewski, P.

    2005-05-01

    Band Iron Formations (BIF) are mainly Precambrian (2.5-1.8 Ga) sedimentary deposits and are composed of alternating layers of iron rich material and silica (chert). Precambrian BIF mark growth in the level of free oxygen in the atmosphere and the ocean which happened about 2.2 Ga. Distribution of main BIF includes Hamersley Range, Australia; Transvaal-Griquatown, South Africa; Minas Gerais, Brazil; Labrador Trough, Canada, and Kursk-Krivoi Rog (Russia). Together these five very large BIF deposits constitute about 90 percent of Earth's total estimated BIF (5.76*10 14 ). On each continent these ancient rocks usually metamorphosed and crystallized include what are variously described as hematite-quartzites, banded iron formations, banded jaspers or calico-rocks. West African, Hudson Bay and Western Australian Satellite Magnetic Anomalies coincide with distribution BIF deposits. The Kursk Satellite Magnetic Anomaly (KMA) (about 22 nT at the altitude=400km, centered at 51o N, 37o E) also was identified by ground and aeromagnetic observations and is recognized as one of the largest magnetic anomaly on the Earth. Magnetic modeling shows that immense Precambrian iron ore deposits (iron bands) of Voronezh uplift are the main source of KMA. Magnetic properties of 10000 BIF samples outcropped in the KMA area have been measured and analyzed (Krutikhovskaya et al., 1964) Rockmag BIF dataset is presented at: http://core2.gsfc.nasa.gov/MPDB/datasets.html. Mean NRM value is about 42 A/M, Qn about 1.4. Demagnetization tests suggest that hard and stable NRM component is caused by hematite occurring in BIF in different forms and grain sizes. Hematite deposits discovered on Mars in western equatorial area with layered topography of Aram Chaos and Sinus Meridiani could be of hydrothermal origin and may be formed similar to hematite precipitated in BIF on Earth.

  15. Cerium anomaly at microscale in fossils.

    Science.gov (United States)

    Gueriau, Pierre; Mocuta, Cristian; Bertrand, Loïc

    2015-09-01

    Patterns in rare earth element (REE) concentrations are essential instruments to assess geochemical processes in Earth and environmental sciences. Excursions in the "cerium anomaly" are widely used to inform on past redox conditions in sediments. This proxy resources to the specificity of cerium to adopt both the +III and +IV oxidation states, while most rare earths are purely trivalent and share very similar reactivity and transport properties. In practical terms, the level of cerium anomaly is established through elemental point quantification and profiling. All these models rely on a supposed homogeneity of the cerium oxidation state within the samples. However, this has never been demonstrated, whereas the cerium concentration can significantly vary within a sample, as shown for fossils, which would vastly complicate interpretation of REE patterns. Here, we report direct micrometric mapping of Ce speciation through synchrotron X-ray absorption spectroscopy and production of local rare earth patterns in paleontological fossil tissues through X-ray fluorescence mapping. The sensitivity of the approach is demonstrated on well-preserved fishes and crustaceans from the Late Cretaceous (ca. 95 million years (Myr) old). The presence of Ce under the +IV form within the fossil tissues is attributed to slightly oxidative local conditions of burial and agrees well with the limited negative cerium anomaly observed in REE patterns. The [Ce(IV)]/[Ce(tot)] ratio appears remarkably stable at the microscale within each fossil and is similar between fossils from the locality. Speciation maps were obtained from an original combination of synchrotron microbeam X-ray fluorescence, absorption spectroscopy, and diffraction, together with light and electron microscopy. This work also highlights the need for more systematic studies of cerium geochemistry at the microscale in paleontological contexts, in particular across fossil histologies.

  16. RADIOLOGICAL EVALUATION OF CRANIOVERTEBRAL JUNCTION ANOMALIES

    Directory of Open Access Journals (Sweden)

    Joji Reddy

    2015-08-01

    Full Text Available INTRODUCTION: Detailed discussions of the CVJ are conspicuously absent in many standard textbooks and chapters addressing the skull or cervical spine, since it lies in between these regions . CVJ anomalies are common in India subcontinent. OBJECTIVES : To outline the normal anatomy and various abnormalities of craniovertebral junction. To evaluate the most common developmental and acquired craniovertebral junction abnormalities . CRANIOMETRY AND DIAGNOSIS: Radiological evaluation of CVJ requir es identification of only a few anatomic structures. Over the years multiple lines , planes and angles have been described for assessment of CVJ relationship , initially with radiography and later with polytomography. Two lines have remained particularly use ful for evaluation of CVJ relationship with virtually any imaging modality: the chamberlain`s line and weckenheim ’ s clivus base line . Two angles also continue to be useful: the welcher basal angle and atlanto occipital joint axis angle. PATIENTS AND METHOD S: The prospective study of craniovertebral junction anomalies was carried out at Kurnool medical college , Governament general hospital Kurnool from NOV 2012 to AUG 2014. The patients are subjected to clinical evaluation and radiological evaluation. OBSERV ATIONS AND RESULTS : In our study there is male predominance with male to female ratio of 2:1 . Majority of patients are in the age group of 11 - 40 (73.26%. The commonest symptom seen is weakness of extremities ( 70% with associated numbness (50%. On clinica l examination pyramidal tract involvement noticed in 70% of cases. Basilar invagination is the most common followed by Atlantoocoipital assimilation (40% and AAD (30% . CONCLUSION : Computed tomography and magnetic resonance imaging are invalvable adjuncts to the plain radiographs in the evaluation of the craniovertebral junction anomalies. Chamberlain’s line and McGregor line are the most commonly applied craniometric measurements

  17. The North German Conductivity Anomaly revisited

    Science.gov (United States)

    Schäfer, A.; Houpt, L.; Brasse, H.; Hoffmann, N.

    2011-10-01

    The North German Conductivity Anomaly was detected already in the early years of electromagnetic deep sounding. It refers to the reversal of induction arrows (as a graphical representation of the tipper transfer function, the ratio of vertical to horizontal magnetic field variations) at the northern and southern margins of the North German Basin. In spite of the many experiments carried out so far, its origin has remained ambiguous; explanations encompass a deep-crustal or even mantle source as well as the simple response to deepening of sedimentary sequences in the centre of the basin. Here, we report on modelling of new long-period magnetotelluric data collected along two profiles in NE Germany and S Sweden, with one transect crossing the Sorgenfrei-Tornquist Zone as the main boundary between Precambrian Baltica and the Palaeozoic belts of central Europe. With the exception of a few sites probably influenced by 3-D salt domes, the data allow a 2-D analysis. Resolution is reduced for large depths due to a well-conducting, saline aquifer, extending across the entire basin. The main result is that the reversal of induction arrows can largely be explained by the resistivity contrast between crystalline basement and sedimentary basin fill. Beneath Rügen island, a southward dipping conductor is interpreted to reflect an alum shale layer in Middle Cambrian-Lower Ordovician sediments. Beneath the southern basin, a moderately conductive upper mantle is modelled (although not very well resolved) which may reflect the thinning of the lithosphere as implied by seismic tomography. As the main anomalously inductive effect is primarily explained by the basin edges and numerous other anomalies exist inside the basin, we suggest not using the term 'North German Conductivity Anomaly' any longer.

  18. Comparison of Methods of Height Anomaly Computation

    Science.gov (United States)

    Mazurova, E.; Lapshin, A.; Menshova, A.

    2012-04-01

    As of today, accurate determination of height anomaly is one of the most difficult problems of geodesy, even with sustainable perfection of mathematical methods, computer possibilities. The most effective methods of height anomaly computation are based on the methods of discrete linear transformations, such as the Fast Fourier Transform (FFT), Short-Time Fourier Transform (STFT), Fast Wavelet Transform (FWT). The main drawback of the classical FFT is weak localization in the time domain. If it is necessary to define the time interval of a frequency presence the STFT is used that allows one to detect the presence of any frequency signal and the interval of its presence. It expands the possibilities of the method in comparison with the classical Fourier Transform. However, subject to Heisenberg's uncertainty principle, it is impossible to tell precisely what frequency signal is present at a given moment of time (it is possible to speak only about the range of frequencies); and it is impossible to tell at what precisely moment of time the frequency signal is present (it is possible to speak only about a time span). A wavelet-transform gives the chance to reduce the influence of the Heisenberg's uncertainty principle on the obtained time-and-frequency representation of the signal. With its help low frequencies have more detailed representation relative to the time, and high frequencies - relative to the frequency. The paper summarizes the results of height anomaly calculations done by the FFT, STFT, FWT methods and represents 3-D models of calculation results. Key words: Fast Fourier Transform(FFT), Short-Time Fourier Transform (STFT), Fast Wavelet Transform(FWT), Heisenberg's uncertainty principle.

  19. Structure and Transport Anomalies in Soft Colloids

    KAUST Repository

    Srivastava, Samanvaya

    2013-04-01

    Anomalous trends in nanoparticle correlation and motion are reported in soft nanoparticle suspensions using static and dynamic x-ray scattering measurements. Contrary to normal expectations, we find that particle-particle correlations decrease and particle dynamics become faster as volume fraction rises above a critical particle loading associated with overlap. Our observations bear many similarities to the cascade of structural and transport anomalies reported for complex, network forming molecular fluids such as water, and are argued to share similar physical origins. © 2013 American Physical Society.

  20. Imaging evaluation of fetal vascular anomalies

    Energy Technology Data Exchange (ETDEWEB)

    Calvo-Garcia, Maria A.; Kline-Fath, Beth M.; Koch, Bernadette L.; Laor, Tal [MLC 5031 Cincinnati Children' s Hospital Medical Center, Department of Radiology, Cincinnati, OH (United States); Adams, Denise M. [Cincinnati Children' s Hospital Medical Center, Department of Pediatrics and Hemangioma and Vascular Malformation Center, Cincinnati, OH (United States); Gupta, Anita [Cincinnati Children' s Hospital Medical Center, Department of Pathology, Cincinnati, OH (United States); Lim, Foong-Yen [Cincinnati Children' s Hospital Medical Center, Pediatric Surgery and Fetal Center of Cincinnati, Cincinnati, OH (United States)

    2015-08-15

    Vascular anomalies can be detected in utero and should be considered in the setting of solid, mixed or cystic lesions in the fetus. Evaluation of the gray-scale and color Doppler US and MRI characteristics can guide diagnosis. We present a case-based pictorial essay to illustrate the prenatal imaging characteristics in 11 pregnancies with vascular malformations (5 lymphatic malformations, 2 Klippel-Trenaunay syndrome, 1 venous-lymphatic malformation, 1 Parkes-Weber syndrome) and vascular tumors (1 congenital hemangioma, 1 kaposiform hemangioendothelioma). Concordance between prenatal and postnatal diagnoses is analyzed, with further discussion regarding potential pitfalls in identification. (orig.)

  1. Trusted Anomaly Detection with Context Dependency

    Institute of Scientific and Technical Information of China (English)

    PENG Xin-guang; YAN Mei-feng

    2006-01-01

    Anomaly detection of privileged processes is one of the most important means to safeguard the host and system security. The key problem for improving detection performance is to identify local behavior of the short sequences in traces of system calls accurately. An alternative modeling method was proposed based on the typical pattern matching of short sequences, which builds upon the concepts of short sequences with context dependency and the specially designed aggregation algorithm. The experimental results indicate that the modeling method considering the context dependency improves clearly the sensitive decision threshold as compared with the previous modeling method.

  2. Ectopia cordis: a rare congenital anomaly.

    Science.gov (United States)

    Gabriel, Abigail; Donnelly, Joseph; Kuc, Alexander; Good, Daniel; Doros, Gabriela; Matusz, Petru; Loukas, Marios

    2014-11-01

    Ectopia cordis (EC) is a rare congenital anomaly associated with the heart positioned outside of the thoracic cavity either partially or completely. The ectopic heart can be found along a spectrum of anatomical locations, including the cervical, thoracic and abdominal regions and in most cases, it protrudes outside the chest through a split sternum. Although the first case of EC was identified during the early 1600s only 91 cases have been reported since then in the literature. This review will discuss the history and prevalence of EC, its etiology, morphology, presentation and symptoms, complications, diagnosis, treatment and management and prognosis.

  3. A model for globular cluster extreme anomalies

    Science.gov (United States)

    D'Antona, F.; Ventura, P.

    2007-08-01

    In spite of the efforts made in recent years, there is still no comprehensive explanation for the chemical anomalies of globular cluster (GC) stars. Among these anomalies, the most striking is oxygen depletion, which reaches values down to [O/Fe] ~ -0.4 in most clusters, but in M13 it goes down to less than [O/Fe] ~ -1. In this work we suggest that the anomalies are due to the superposition of two different events, as follows. (i) Primordial self-enrichment; this is required to explain the oxygen depletion down to a minimum value [O/Fe] ~ -0.4. (ii) Extra mixing in a fraction of the stars already born with anomalous composition; these objects, starting with already low [O/Fe], will reduce the oxygen abundance down to the most extreme values. Contrary to other models that invoke extra mixing to explain the chemical anomalies, we suggest that this mixing is active only if there is a fraction of the stars in which the primordial composition is not only oxygen-depleted, but also extremely helium-rich (Y ~ 0.4), as found in a few GCs from their main-sequence multiplicity. We propose that the rotational evolution (and an associated extra mixing) of extremely helium-rich stars may be affected by the fact that they develop a very small or non-existent molecular weight barrier during the evolution. We show that extra mixing in these stars, having initial chemistry that has already been CNO processed, affects mainly the oxygen abundance, as well as (to a much smaller extent) the sodium abundance. The model also predicts a large fluorine depletion concomitant with the oxygen depletion, and a further enhancement of the surface helium abundance, which reaches values close to Y = 0.5 in the computed models. We stress that, in this tentative explanation, those stars that are primordially oxygen-depleted, but are not extremely helium-rich, do not suffer deep extra mixing.

  4. Conformal Anomaly and Large Scale Gravitational Coupling

    CERN Document Server

    Salehi, H

    2000-01-01

    We present a model in which the breackdown of conformal symmetry of a quantum stress-tensor due to the trace anomaly is related to a cosmological effect in a gravitational model. This is done by characterizing the traceless part of the quantum stress-tensor in terms of the stress-tensor of a conformal invariant classical scalar field. We introduce a conformal frame in which the anomalous trace is identified with a cosmological constant. In this conformal frame we establish the Einstein field equations by connecting the quantum stress-tensor with the large scale distribution of matter in the universe.

  5. Colours and anomalies of skin: diploma 2015

    OpenAIRE

    Marty, Nicolas; Geiser, Martial

    2016-01-01

    Afin de suivre et d’analyser l’évolution, lors de traitement ou pas, de lésions de la peau (grains de beauté, plaies, tâches de sénescence, coup de soleil …), nous avons développé une caméra portable munie d’une illumination multispectrale capable d’envoyer les images sur un serveur dédié et d’analyser ces images We developed a handheld camera with multispectral illumination to take pictures and to analyse anomalies of skin. The fields of use are: a) analysing and tracking skin lesions suc...

  6. Torque Anomaly in Quantum Field Theory

    CERN Document Server

    Fulling, S A; Trendafilova, C S

    2012-01-01

    The expectation values of energy density and pressure of a quantum field inside a wedge-shaped region appear to violate the expected relationship between torque and total energy as a function of angle. In particular, this is true of the well-known Deutsch--Candelas stress tensor for the electromagnetic field, whose definition requires no regularization except possibly at the vertex. Unlike a similar anomaly in the pressure exerted by a reflecting boundary against a perpendicular wall, this problem cannot be dismissed as an artifact of an ad hoc regularization.

  7. Second type of first branchial cleft anomaly

    Directory of Open Access Journals (Sweden)

    Hitesh Verma

    2016-01-01

    Full Text Available First branchial cleft fistula is a rare congenital malformation of the head and neck with an incidence of <8% of all branchial cleft defects. The patient presenting with discharging sinus in the neck with discharging ear should be investigated for a possible branchial cleft anomaly. Rarity and diverse presentation often lead to misdiagnosis and inadequate treatment. Recurrent infection and scarring make intraoperative identification of facial nerve made very difficult. We report a case of a 5-year-old boy with a first branchial cleft fistula, in which discharge was observed through the fistulous opening on the right side of the face and along the ear canal.

  8. Atom capture by nanotube and scaling anomaly

    CERN Document Server

    Giri, Pulak Ranjan

    2007-01-01

    The existence of bound state of the polarizable neutral atom in the inverse square potential created by the electric field of single walled charged carbon nanotube (SWNT) is shown to be theoretically possible. The consideration of inequivalent boundary conditions due to self-adjoint extensions lead to this nontrivial bound state solution. It is also shown that the scaling anomaly is responsible for the existence of bound state. Binding of the polarizable atoms in the coupling constant interval \\eta^2\\in[0,1) may be responsible for the smearing of the edge of steps in quantized conductance, which has not been considered so far in literature.

  9. Residual generator for cardiovascular anomalies detection

    KAUST Repository

    Belkhatir, Zehor

    2014-06-01

    This paper discusses the possibility of using observer-based approaches for cardiovascular anomalies detection and isolation. We consider a lumped parameter model of the cardiovascular system that can be written in a form of nonlinear state-space representation. We show that residuals that are sensitive to variations in some cardiovascular parameters and to abnormal opening and closure of the valves, can be generated. Since the whole state is not easily available for measurement, we propose to associate the residual generator to a robust extended kalman filter. Numerical results performed on synthetic data are provided.

  10. Magnetic resonance imaging in craniovertebral junction anomaly

    Energy Technology Data Exchange (ETDEWEB)

    Tada, Shimpei; Hata, Yuichi; Miyamoto, Yukio

    1985-03-01

    Materials consisted of 6 cases with occipitalization of the atlas, (4 of them complicated by basilar impression), 7 with basilar impression, one with hypoplasia of the atlas and C2-3 fusion, and one with os odontoideum. Basal angles after Welcker were all more than 130 in contrast to 118-138 (127 an average) in control group. Basal angle more than 140 denoted platybasia. Syringomyelia was seen in 7 of all 15 cases and 4 of 5 cases with platybasia. Chiari malformation was seen in 9 of all 15 cases and 4 of 5 with platybasia. Basal angles were closely related to craniovertebral junction bone anomaly, syringomyelia, and Chiari malformation. (author).

  11. The chiral anomaly from M theory

    CERN Document Server

    Gursoy, U; Portugues, R; Gursoy, Umut; Hartnoll, Sean A.; Portugues, Ruben

    2003-01-01

    We argue that the chiral anomaly of $\\Ncal = 1$ super Yang-Mills theory admits a dual description as spontaneous symmetry breaking in M theory on $G_2$ holonomy manifolds. We identify an angle of the $G_2$ background dual to the anomalous $U(1)_R$ current in field theory. This angle is not an isometry of the metric and we therefore develop a theory of ``massive isometry'' to describe fluctuations about such angles. Another example of a massive isometry occurs in the Atiyah-Hitchin metric.

  12. Mouse models for understanding human developmental anomalies

    Energy Technology Data Exchange (ETDEWEB)

    Generoso, W.M.

    1989-01-01

    The mouse experimental system presents an opportunity for studying the nature of the underlying mutagenic damage and the molecular pathogenesis of this class of anomalies by virtue of the accessibility of the zygote and its descendant blastomeres. Such studies could contribute to the understanding of the etiology of certain sporadic but common human malformations. The vulnerability of the zygotes to mutagens as demonstrated in the studies described in this report should be a major consideration in chemical safety evaluation. It raises questions regarding the danger to human zygotes when the mother is exposed to drugs and environmental chemicals.

  13. Associated anomalies in cases with anotia and microtia.

    Science.gov (United States)

    Stoll, Claude; Alembik, Yves; Dott, Beatrice; Roth, Marie-Paule

    2016-12-01

    Infants with anotia and microtia (AM) often have other non-AM associated congenital anomalies. The purpose of this investigation was to assess the prevalence and the types of these associated anomalies in a defined population. The associated anomalies in infants with AM were collected in all livebirths, stillbirths and terminations of pregnancy during 29 years in 387,067 consecutive births in the area covered by our population-based registry of congenital malformations. Of the 146 cases with AM registered during this period, representing a prevalence of 3.77 per 10,000, 49.3% had associated anomalies. There were 14 (9.6%) cases with chromosomal abnormalities including 5 trisomies 18, and 18 (12.3%) nonchromosomal recognized dysmorphic conditions including 6 cases with oculo-auriculo-vertebral spectrum. However, numerous other recognized dysmorphic conditions were registered. Forty (27.4%) of the cases had multiple congenital anomalies (MCA). Anomalies especially in the cardiovascular, the musculoskeletal, the urogenital, the central nervous, and the digestive systems, and facial clefts were the most common other anomalies. This study included special strengths: each affected child was examined by a geneticist, all elective terminations were ascertained, and the surveillance for anomalies was continued until 2 years of age. In conclusion the overall prevalence of associated anomalies, which was one in every two cases, emphasizes the need for a thorough investigation of cases with AM. A routine screening for other anomalies may be considered in infants and in fetuses with AM.

  14. Broader than Broadway. Le anomalie dentro la griglia / Broader than Broadway. The anomalies within the grid

    Directory of Open Access Journals (Sweden)

    Job Floris

    2015-01-01

    Full Text Available La tipologia di edifici poco profondi e cuneiformi è emersa come conseguenza dell’incontro di un piano urbano inserito in un tessuto urbano esistente. Questo fenomeno compare in diverse città come New York o Parigi. Generalmente, queste anomalie non fanno parte della strategia urbana in modo conscio, ma sono eccezioni e difetti nella logica della pianificazione. Nonostante ciò sono la causa di momenti urbani affascinanti, nei quali l’unione tra urbanistica e architettura sembra dare del suo meglio. Queste anomalie si possono percepire sia come insoliti oggetti, sia come obbedienza al piano urbanistico. Seguendo le regole di quest'ultimo su tutta la linea, sorgono edifici grande importanza perche' pezzi indispensabili in grado di rafforzare la trama urbana. / The typology of thin, shallow and wedge-shaped buildings emerged as a consequence of the meeting of an implemented urban plan into an existing city-fabric. This phenomenon appears in several cities throughout the world such as New York or Paris. In general, these anomalies are not consciously part of the urban strategy, but exceptions and flaws in the logic of their urban plan. Nevertheless causing fascinating urban moments, where the merge of urbanism and architecture might be at its best. These anomalies can be perceived both as a strange object and the ultimate obedience to the urban plan. By following the rules of urbanism all the way, buildings with exotic proportions arise, of big importance since these indispensable pieces are enforcing the urban pattern.

  15. [Horseshoe kidney: not a simple fusion anomaly].

    Science.gov (United States)

    Caccetta, Francesco; Caroppo, Maurizio; Musio, Fernando; Mudoni, Anna; Accogli, Antonella; Zacheo, Maria Dolores; Burzo, Domenica; Bramato, Daniele; Carluccio, Giancamillo; Nuzzo, Vitale

    2015-01-01

    The horseshoe kidney is a congenital anatomical defect of the kidney that occurs in 0,25% of the population and is generally characterized by the fusion of the lower poles of the two kidneys through an isthmus and to which may be associated with urogenital and renal vascular anomalies. Asymptomatic in 1/3 of the cases and, most of time, accidentally discovered during a radiological examination, promotes nephrolithiasis, ureteropelvic junction obstruction, hydronephrosis, vesicoureteral reflux and pyelonephritis. We report two cases of patients with kidney horseshoe, characterized by the abrupt onset of a septic state with oligo-anuric acute renal failure, electrolyte and acid-base abnormalities, rapid decay of the general conditions, with detection of nephrolithiasis, hydronephrosis and acute pyelonephritis and whose clinical management resulted in a significant and synergistic nefro-urology involvment. The kidney horseshoe not represent so only a simple fusion anomaly but rather an important anatomical condition that, once diagnosed, it would be worthy of a careful clinical, radiological and laboratory surveillance, in order to prevent the potential complications that may be also particularly severe.

  16. Abundance Anomalies In Tidal Disruption Events

    CERN Document Server

    Kochanek, C S

    2015-01-01

    The ~10% of tidal disruption events (TDEs) due to stars more massive than the Sun should show abundance anomalies due to stellar evolution in helium, carbon and nitrogen, but not oxygen. Helium is always enhanced, but only by up to ~25% on average because it becomes inaccessible once it is sequestered in the high density core as the star leaves the main sequence. However, portions of the debris associated with the disrupted core of a main sequence star can be enhanced in helium by factors of 2-3 for debris at a common orbital period. These helium abundance variations may be a contributor to the observed diversity of hydrogen and helium line strengths in TDEs. A still more striking anomaly is the rapid enhancement of nitrogen and the depletion of carbon due to the CNO cycle -- stars more massive than the Sun quickly show an increase in their average N/C ratio by factors of 3-10. Because low mass stars evolve slowly and high mass stars are rare, TDEs showing high N/C will almost all be due to 1-2Msun stars disr...

  17. Firewall policy anomaly detection and resolution

    Directory of Open Access Journals (Sweden)

    R.V. Darade

    2015-11-01

    Full Text Available Security of all private networks in businesses and institutions is achieved by firewall. Firewall provides protection by the quality of policy configured. Lack of Systematic analysis mechanism and Tools, Complex firewall configuration makes designing and managing firewall policies difficult. With help of segmentation rule, anomaly management framework is designed for accurate detection and effective resolution of anomalies. Using this technique, packets of network can be divided into set of disjoint packet space segments. Every segment is associated with unique set of firewall rules which specify an overlap relation among all firewall rules which could be conflicting or redundant. Flexible conflict resolution method is provided which has many resolution strategies for risk assessment of protected networks and its policy definition. Firewall logs are maintained by using association rule mining on these logs to find frequent logs, which in turned filtered to find malicious packets. Apriori algorithm is used to find frequent element from above logs. In each round, it computes the support for all candidate-item-sets. Candidate-item-sets with frequency above the minimum support parameter are selected at the end of each round; these frequent item-sets of round are used in the next round to construct candidate -item-sets. The algorithm halts when item-sets with desired frequency not found .

  18. Axial gravity, massless fermions and trace anomalies

    Science.gov (United States)

    Bonora, L.; Cvitan, M.; Prester, P. Dominis; Pereira, A. Duarte; Giaccari, S.; Štemberga, T.

    2017-08-01

    This article deals with two main topics. One is odd parity trace anomalies in Weyl fermion theories in a 4d curved background, the second is the introduction of axial gravity. The motivation for reconsidering the former is to clarify the theoretical background underlying the approach and complete the calculation of the anomaly. The reference is in particular to the difference between Weyl and massless Majorana fermions and to the possible contributions from tadpole and seagull terms in the Feynman diagram approach. A first, basic, result of this paper is that a more thorough treatment, taking account of such additional terms and using dimensional regularization, confirms the earlier result. The introduction of an axial symmetric tensor besides the usual gravitational metric is instrumental to a different derivation of the same result using Dirac fermions, which are coupled not only to the usual metric but also to the additional axial tensor. The action of Majorana and Weyl fermions can be obtained in two different limits of such a general configuration. The results obtained in this way confirm the previously obtained ones.

  19. Framework for behavioral analytics in anomaly identification

    Science.gov (United States)

    Touma, Maroun; Bertino, Elisa; Rivera, Brian; Verma, Dinesh; Calo, Seraphin

    2017-05-01

    Behavioral Analytics (BA) relies on digital breadcrumbs to build user profiles and create clusters of entities that exhibit a large degree of similarity. The prevailing assumption is that an entity will assimilate the group behavior of the cluster it belongs to. Our understanding of BA and its application in different domains continues to evolve and is a direct result of the growing interest in Machine Learning research. When trying to detect security threats, we use BA techniques to identify anomalies, defined in this paper as deviation from the group behavior. Early research papers in this field reveal a high number of false positives where a security alert is triggered based on deviation from the cluster learned behavior but still within the norm of what the system defines as an acceptable behavior. Further, domain specific security policies tend to be narrow and inadequately represent what an entity can do. Hence, they: a) limit the amount of useful data during the learning phase; and, b) lead to violation of policy during the execution phase. In this paper, we propose a framework for future research on the role of policies and behavior security in a coalition setting with emphasis on anomaly detection and individual's deviation from group activities.

  20. Detecting syntactic and semantic anomalies in schizophrenia.

    Science.gov (United States)

    Moro, Andrea; Bambini, Valentina; Bosia, Marta; Anselmetti, Simona; Riccaboni, Roberta; Cappa, Stefano F; Smeraldi, Enrico; Cavallaro, Roberto

    2015-12-01

    One of the major challenges in the study of language in schizophrenia is to identify specific levels of the linguistic structure that might be selectively impaired. While historically a main semantic deficit has been widely claimed, results are mixed, with also evidence of syntactic impairment. This might be due to heterogeneity in materials and paradigms across studies, which often do not allow to tap into single linguistic components. Moreover, the interaction between linguistic and neurocognitive deficits is still unclear. In this study, we concentrated on syntactic and semantic knowledge. We employed an anomaly detection task including short and long sentences with either syntactic errors violating the principles of Universal Grammar, or a novel form of semantic errors, resulting from a contradiction in the computation of the whole sentence meaning. Fifty-eight patients with diagnosis of schizophrenia were compared to 30 healthy subjects. Results showed that, in patients, only the ability to identify syntactic anomaly, both in short and long sentences, was impaired. This result cannot be explained by working memory abilities or psychopathological features. These findings suggest the presence of an impairment of syntactic knowledge in schizophrenia, at least partially independent of the cognitive and psychopathological profile. On the contrary, we cannot conclude that there is a semantic impairment, at least in terms of compositional semantics abilities.

  1. Effective Tolman temperature induced by trace anomaly

    Energy Technology Data Exchange (ETDEWEB)

    Eune, Myungseok [Sangmyung University, Department of Civil Engineering, Cheonan (Korea, Republic of); Gim, Yongwan [Sogang University, Department of Physics, Seoul (Korea, Republic of); Sogang University, Research Institute for Basic Science, Seoul (Korea, Republic of); Kim, Wontae [Sogang University, Department of Physics, Seoul (Korea, Republic of)

    2017-04-15

    Despite the finiteness of stress tensor for a scalar field on the four-dimensional Schwarzschild black hole in the Israel-Hartle-Hawking vacuum, the Tolman temperature in thermal equilibrium is certainly divergent on the horizon due to the infinite blue-shift of the Hawking temperature. The origin of this conflict is due to the fact that the conventional Tolman temperature was based on the assumption of a traceless stress tensor, which is, however, incompatible with the presence of the trace anomaly responsible for the Hawking radiation. Here, we present an effective Tolman temperature which is compatible with the presence of the trace anomaly by using the modified Stefan-Boltzmann law. Eventually, the effective Tolman temperature turns out to be finite everywhere outside the horizon, and so an infinite blue-shift of the Hawking temperature at the event horizon does not appear any more. In particular, it is vanishing on the horizon, so that the equivalence principle is exactly recovered at the horizon. (orig.)

  2. Firewall policy anomaly detection and resolution

    Directory of Open Access Journals (Sweden)

    Ms. R.V.Darade

    2014-06-01

    Full Text Available Security of all private networks in businesses and institutions is achieved by firewall. Firewall provides protection by the quality of policy configured. Lack of Systematic analysis mechanism and Tools, Complex firewall configuration makes designing and managing firewall policies difficult. With help of segmentation rule, anomaly management framework is designed for accurate detection and effective resolution of anomalies. Using this technique, packets of network can be divided into set of disjoint packet space segments. Every segment is associated with unique set of firewall rules which specify an overlap relation among all firewall rules whic h could be conflicting or redundant. Flexible conflict resolution method is provided which has many resolution stra tegies for risk assessment of protected networks and its policy definition. Firewall logs are maintained by using association rule mining on these logs to find frequent logs, which in turned filtered to find malicious packets. Apriori algorithm is used to find frequent element from above logs. In each round, it computes the support for all candidate-item-sets. Candidate-item-sets with frequency above the minimum support parameter are selected at the end of each round; these frequent item-sets of round are used in the next round to construct candidate -item-sets. The algorithm halts when item-sets with desired frequency not found .

  3. ENSO cycle and climate anomaly in China

    Institute of Scientific and Technical Information of China (English)

    CHEN Yongli; ZHAO Yongping; FENG Junqiao; WANG Fan

    2012-01-01

    The inter-annual variability of the tropical Pacific Subsurface Ocean Temperature Anomaly (SOTA) and the associated anomalous atmospheric circulation over the Asian North Pacific during the El Ni(n)o-Southern Oscillation (ENSO) were investigated using National Centers for Environmental Prediction/ National Center for Atmospheric Research (NCEP/NCAR) atmospheric reanalysis data and simple ocean data simulation (SODA).The relationship between the ENSO and the climate of China was revealed.The main results indicated the following:1) there are two ENSO modes acting on the subsurface tropical Pacific.The first mode is related to the mature phase of ENSO,which mainly appears during winter.The second mode is associated with a transition stage of the ENSO developing or decaying,which mainly occurs during summer; 2) during the mature phase of El Ni(n)o,the meridionality of the atmosphere in the mid-high latitude increases,the Aleutian low and high pressure ridge over Lake Baikal strengthens,northerly winds prevail in northern China,and precipitation in northern China decreases significantly.The ridge of the Ural High strengthens during the decaying phase of El Ni(n)o,as atmospheric circulation is sustained during winter,and the northerly wind anomaly appears in northern China during summer.Due to the ascending branch of the Walker circulation over the western Pacific,the western Pacific Subtropical High becomes weaker,and south-southeasterly winds prevail over southern China.As a result,less rainfall occurs over northern China and more rainfall over the Changjiang River basin and the southwestern and eastern region of Inner Mongolia.The flood disaster that occurred south of Changjiang River can be attributed to this.The La Ni(n)a event causes an opposite,but weaker effect; 3) the ENSO cycle can influence climate anomalies within China via zonal and meridional heat transport.This is known as the "atmospheric-bridge",where the energy anomaly within the tropical Pacific

  4. Major congenital anomalies in babies born with Down syndrome

    DEFF Research Database (Denmark)

    Morris, Joan K; Garne, Ester; Wellesley, Diana

    2014-01-01

    Previous studies have shown that over 40% of babies with Down syndrome have a major cardiac anomaly and are more likely to have other major congenital anomalies. Since 2000, many countries in Europe have introduced national antenatal screening programs for Down syndrome. This study aimed...... to determine if the introduction of these screening programs and the subsequent termination of prenatally detected pregnancies were associated with any decline in the prevalence of additional anomalies in babies born with Down syndrome. The study sample consisted of 7,044 live births and fetal deaths with Down...... syndrome registered in 28 European population-based congenital anomaly registries covering seven million births during 2000-2010. Overall, 43.6% (95% CI: 42.4-44.7%) of births with Down syndrome had a cardiac anomaly and 15.0% (14.2-15.8%) had a non-cardiac anomaly. Female babies with Down syndrome were...

  5. Prevalence and Distribution of Developmental Dental Anomalies in Pediatric Patients

    Directory of Open Access Journals (Sweden)

    Merve Erkmen Almaz

    2017-08-01

    Full Text Available Objective: The objective of this study was to evaluate the prevalence of dental anomalies in paediatric patients attending the Department of Paediatric Dentistry, Kırıkkale University Faculty of Dentistry. Materials and Methods: The study consisted a sample of 9173 patients, aged between 0-15 years, referred to our clinic between 1 August 2011-1 August 2012. The patients were examined clinically and radiographically in terms of the number, size, shape, structure and color anomalies. Results: One hundred sixty six children (1.8% were found to have developmental dental anomalies. The most frequently observed anomalies were congenitally missing teeth (0.52% and supernumerary teeth (0.27%. Anomalies such as dens invaginatus (0.03%, dentinogenesis imperfecta (0.02% and dilaceration (0.02% were encountered more rarely. Conclusion: Early diagnosis and determination of the prevalence of dental anomalies in children is important in the treatment planning.

  6. Geoid anomalies over Gorringe Ridge, North Atlantic Ocean

    Science.gov (United States)

    Souriau, A.

    1984-04-01

    The geoid anomalies over Gorringe Ridge, a very prominent high in the topography north of the Azores-Gibraltar plate boundary, have been deduced from Seasat alimetric data, and an interpretation of these anomalies together with the gravity anomalies is attempted. The geoid anomalies generated by the topographic high alone with the serpentinite density nearly fit the observed geoid anomalies, so that the structure must be either out of isostatic equilibrium or compensated at great depth. It is shown that a model in isostatic equilibrium with a small negative density contrast extending to 60 km depth or more explains both the gravity and geoid anomalies and is compatible with the deep seismicity north of Gorringe Ridge. Previous nonisostatic models, one involving an uplift of the upper mantle beneath the ridge, one describing a nascent subduction zone, and another involving flexure of the elastic part of the lithosphere due to the ridge loading, are discussed.

  7. Axial Anomaly in Lattice Abelian Gauge Theory in Arbitrary Dimensions

    CERN Document Server

    Fujiwara, T; Wu, K; Fujiwara, Takanori; Suzuki, Hiroshi; Wu, Ke

    1999-01-01

    Axial anomaly of lattice abelian gauge theory in hyper-cubic regular lattice in arbitrary even dimensions is investigated by applying the method of exterior differential calculus. The topological invariance, gauge invariance and locality of the axial anomaly determine the explicit form of the topological part. The anomaly is obtained up to a multiplicative constant for finite lattice spacing and can be interpreted as the Chern character of the abelian lattice gauge theory.

  8. Application of Noncommutative Differential Geometry on Lattice to Anomaly

    CERN Document Server

    Fujiwara, T; Wu, K; Fujiwara, Takanori; Suzuki, Hiroshi; Wu, Ke

    1999-01-01

    The chiral anomaly in lattice abelian gauge theory is investigated by applying the geometric and topological method in noncommutative differential geometry(NCDG). A new kind of double complex and descent equation are proposed on infinite hypercubic lattice in arbitrary even dimensional Euclidean space, in the framework of NCDG. Using the general solutions to proposed descent equation, we derive the chiral anomaly in Abelian lattice gauge theory. The topological origin of anomaly is nothing but the Chern classes in NCDG.

  9. Examining the relationship between skull size and dental anomalies

    OpenAIRE

    Krecioch, Joseph

    2014-01-01

    This study, reporting the results of a 2012 Master’s dissertation, of 131 skulls from 6 Classical to Medieval populations in Macedonia and England examined the relationship between craniometric variables and dental anomalies of shape, number, and position. Standard craniometric landmarks were measured and dental anomalies of shape, number, and position were recorded and tested for associations using SPSS. Rotations were the most common anomaly and were associated significantly with reduced ...

  10. Method for detecting software anomalies based on recurrence plot analysis

    OpenAIRE

    Michał Mosdorf

    2012-01-01

    Presented paper evaluates method for detecting software anomalies based on recurrence plot analysis of trace log generated by software execution. Described method for detecting software anomalies is based on windowed recurrence quantification analysis for selected measures (e.g. Recurrence rate - RR or Determinism - DET). Initial results show that proposed method is useful in detecting silent software anomalies that do not result in typical crashes (e.g. exceptions).

  11. Method for detecting software anomalies based on recurrence plot analysis

    Directory of Open Access Journals (Sweden)

    Michał Mosdorf

    2012-03-01

    Full Text Available Presented paper evaluates method for detecting software anomalies based on recurrence plot analysis of trace log generated by software execution. Described method for detecting software anomalies is based on windowed recurrence quantification analysis for selected measures (e.g. Recurrence rate - RR or Determinism - DET. Initial results show that proposed method is useful in detecting silent software anomalies that do not result in typical crashes (e.g. exceptions.

  12. On Certain Conceptual Anomalies in Einstein's Theory of Relativity

    OpenAIRE

    2008-01-01

    There are a number of conceptual anomalies occurring in the Standard exposition of Einstein’s Theory of Relativity. These anomalies relate to issues in both mathematics and in physics and penetrate to the very heart of Einstein’s theory. This paper reveals and amplifies a few such anomalies, including the fact that Einstein’s field equations for the so-called static vacuum configuration, R = 0 , violates his Principle of Equiv- alence, and is therefore ...

  13. Associated noncardiac congenital anomalies among cases with congenital heart defects.

    Science.gov (United States)

    Stoll, Claude; Dott, Beatrice; Alembik, Yves; Roth, Marie-Paule

    2015-02-01

    Cases with congenital heart defects (CHD) often have other associated anomalies. The purpose of this investigation was to assess the prevalence and the types of associated anomalies in CHD in a defined population. The anomalies associated with CHD were collected in all live births, stillbirths and terminations of pregnancy during 26 years in 346,831 consecutive pregnancies of known outcome in the area covered by our population based registry of congenital anomalies. Of the 4005 cases with CHD born during this period (total prevalence of 115.5 per 10,000), 1055 (26.3%) had associated major anomalies. There were 354 (8.8%) cases with chromosomal abnormalities including 218 trisomies 21, and 99 (2.5%) nonchromosomal recognized dysmorphic conditions. There were no predominant recognized dysmorphic conditions, but VACTERL association. However, other recognized dysmorphic conditions were registered including Noonan syndrome, fetal alcohol syndrome, and skeletal dysplasias. Six hundred and two (15.0%) of the cases had non syndromic, non chromosomal multiple congenital anomalies (MCA). Anomalies in the urinary tract, the musculoskeletal, the digestive, and the central nervous systems were the most common other anomalies. Prenatal diagnosis was obtained in 18.7% of the pregnancies. In conclusion the overall prevalence of associated anomalies, which was one in four infants, emphasizes the need for a thorough investigation of cases with CHD. A routine screening for other anomalies may be considered in infants and in fetuses with CHD. One should be aware that the anomalies associated with CHD can be classified into a recognizable anomaly, syndrome or pattern in one out of nine cases with CHD.

  14. Comparison of machine learning models for classification of BGP anomalies

    OpenAIRE

    2012-01-01

    Worms such as Slammer, Nimda, and Code Red~I are anomalies that affect performance of the global Internet Border Gateway Protocol (BGP). BGP anomalies also include Internet Protocol (IP) prefix hijacks, miss-configurations, and electrical failures. In this Thesis, we analyzed the feature selection process to choose the most correlated features for an anomaly class. We compare the Fisher, minimum redundancy maximum relevance (mRMR), odds ratio (OR), extended/multi-class/weighted odds ratio (EO...

  15. Anomalía de Ebstein

    OpenAIRE

    Ramírez M,Samuel; Cervantes S,Jorge L

    2006-01-01

    Presentamos los resultados del tratamiento quirúrgico de 61 enfermos, niños y adultos, sometidos a tratamiento en el Servicio de Cirugía de Cardiopatías Congénitas del Instituto Nacional de Cardiología "Ignacio Chávez" entre enero de 1993 y agosto de 2003. Analizamos los datos demográficos, el estado funcional y los datos ecocardiográficos pre y postoperatorios, así como la morbilidad y mortalidad. La técnica quirúrgica comprende la plicatura vertical de la porción atrializada del ventrículo ...

  16. On the trace anomaly of a Weyl fermion

    CERN Document Server

    Bastianelli, Fiorenzo

    2016-01-01

    We calculate the trace anomaly of a Weyl fermion coupled to gravity by using Fujikawa's method supplemented by a consistent regulator. The latter is constructed out of Pauli-Villars regulating fields. The motivation for presenting such a calculation stems from recent studies that suggest that the trace anomaly of chiral fermions in four dimensions might contain an imaginary part proportional to the Pontryagin density. We find that the trace anomaly of a Weyl fermion is given by half the trace anomaly of a Dirac fermion, so that no imaginary part proportional to the Pontryagin density is seen to arise.

  17. FOETAL ULTRASOUND - NEUROECTODERMAL ANOMALIES IN RURAL PREGNANT WOMEN

    Directory of Open Access Journals (Sweden)

    Mala Venkata

    2016-06-01

    Full Text Available BACKGROUND A prospective clinical study to know the various types of congenital Neuroectodermal Anomalies on obstetric Ultrasound, in rural pregnant women. To reduce the maternal morbidity and mortality by early detection of these Congenital Neuroectodermal Anomalies. To calculate the incidence and prevalence of different types of Congenital Neuroectodermal Anomalies, in these rural pregnant women. To assist the obstetrician in taking decisions regarding the termination or continuation of the pregnancy in relation to the type of malformation and its prognosis. METHODS A prospective clinical study of Congenital Neuroectodermal Anomalies in 22,000 rural pregnant women coming to the Santhiram Medical College, Radiology Department for a routine obstetric scan. 44 cases of neuroectodermal anomalies were detected out of the 22000 cases, within an incidence of 2 per 1000 cases. Approximately 1 in every 500 cases showed an anomaly. RESULTS The most common lesions detected were hydrocephalus, and spina bifida followed by anencephaly. Association of these lesions with consanguinity, previous history of similar anomaly and intake of iron and folic acid tablets was noted. CONCLUSION Ultrasound is an excellent modality for the diagnosis and characterisation of the neuroectodermal anomalies. Its multiplanar imaging property along with real time image visualisation make it an excellent tool for the diagnosis and characterisation of these anomalies

  18. The Weyl anomaly and the nature of the background geometry

    CERN Document Server

    Quirós, I

    2000-01-01

    The Weyl anomaly problem is treated within a purely geometrical context. Arguments are given that hint at a possible classical origin of the conformal anomaly in the Riemannian nature of the background geometry where the matter fields play out their dynamics. Some considerations allowing for a possible resolution of the Weyl anomaly problem are briefly outlined. Following the spirit of the standard model of the fundamental interactions, it is argued that the Weyl anomaly should be a consequence of the breaking of the gauge symmetry at some stage during the evolution of the universe.

  19. Diagnosing Traffic Anomalies Using a Two-Phase Model

    Institute of Scientific and Technical Information of China (English)

    Bin Zhang; Jia-Hai Yang; Jian-Ping Wu; Ying-Wu Zhu

    2012-01-01

    Network traffic anomalies are unusual changes in a network,so diagnosing anomalies is important for network management.Feature-based anomaly detection models (ab)normal network traffic behavior by analyzing packet header features. PCA-subspace method (Principal Component Analysis) has been verified as an efficient feature-based way in network-wide anomaly detection.Despite the powerful ability of PCA-subspace method for network-wide traffic detection,it cannot be effectively used for detection on a single link.In this paper,different from most works focusing on detection on flow-level traffic,based on observations of six traffc features for packet-level traffic,we propose a new approach B6SVM to detect anomalies for packet-level traffic on a single link.The basic idea of B6-SVM is to diagnose anomalies in a multi-dimensional view of traffic features using Support Vector Machine (SVM).Through two-phase classification,B6-SVM can detect anomalies with high detection rate and low false alarm rate.The test results demonstrate the effectiveness and potential of our technique in diagnosing anomalies.Further,compared to previous feature-based anomaly detection approaches,B6-SVM provides a framework to automatically identify possible anomalous types.The framework of B6-SVM is generic and therefore,we expect the derived insights will be helpful for similar future research efforts.

  20. Global structure of ionospheric TEC anomalies driven by geomagnetic storms

    Science.gov (United States)

    Pancheva, D.; Mukhtarov, P.; Andonov, B.

    2016-07-01

    This study examines the structure and variability of the ionospheric TEC anomalies driven by geomagnetic storms. For this purpose the CODE global ionospheric TEC data from four geomagnetically disturbed periods (29 October-1 November 2003, 7-10 November 2004, 14-15 December 2006, and 5-6 August 2011) have been considered. By applying the tidal analysis to the geomagnetically forced TEC anomalies we made an attempt to identify the tidal or stationary planetary wave (SPW) signatures that may contribute to the generation of these anomalies. It has been found that three types of positive anomalies with different origin and different latitudinal appearance are observed. These are: (i) anomalies located near latitudes of ±40° and related to the enhancement and poleward moving of the equatorial ionization anomaly (EIA) crests; (ii) anomalies located near latitudes of ±60° and seen predominantly in the night-side ionosphere, and (iii) very high latitude anomalies having mainly zonally symmetric structure and related to the auroral heating and thermospheric expansion. The decomposition analysis revealed that these anomalies can be reconstructed as a result of superposition of the following components: zonal mean (ZM), diurnal migrating (DW1), zonally symmetric diurnal (D0), and stationary planetary wave 1 (SPW1).

  1. DISTRIBUTED ANOMALY DETECTION USING SATELLITE DATA FROM MULTIPLE MODALITIES

    Data.gov (United States)

    National Aeronautics and Space Administration — DISTRIBUTED ANOMALY DETECTION USING SATELLITE DATA FROM MULTIPLE MODALITIES KANISHKA BHADURI*, KAMALIKA DAS, AND PETR VOTAVA* Abstract. There has been a tremendous...

  2. Caution is recommended prior to sildenafil use in vascular anomalies.

    Science.gov (United States)

    Rankin, Hannah; Zwicker, Kelley; Trenor, Cameron C

    2015-11-01

    Since publication of a single case report of lymphatic malformation improvement during sildenafil therapy for pulmonary hypertension, sildenafil use has propagated across multiple vascular anomalies diagnoses. Vascular anomalies are rare conditions, often with poor long-term outcomes from available therapies, making these patients vulnerable to novel therapy use. We have retrospectively reviewed 14 children with vascular anomalies treated with sildenafil. None of these patients reported improvement of disease while on treatment and some reported side effects including infections and bleeding. Pending more convincing prospective data, we recommend caution prior to sildenafil use for vascular anomalies.

  3. Unsupervised Anomaly Detection for Liquid-Fueled Rocket Prop...

    Data.gov (United States)

    National Aeronautics and Space Administration — Title: Unsupervised Anomaly Detection for Liquid-Fueled Rocket Propulsion Health Monitoring. Abstract: This article describes the results of applying four...

  4. Physical Modeling for Anomaly Diagnostics and Prognostics Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Ridgetop developed an innovative, model-driven anomaly diagnostic and fault characterization system for electromechanical actuator (EMA) systems to mitigate...

  5. TERATOGENIC EFFECTS OF SILVER NANOPARTICLES: GROSS ANOMALIES

    Directory of Open Access Journals (Sweden)

    Jyoti Prakash

    2015-07-01

    Full Text Available BACK GROUND: Prenatal exposure of AgNPs can induces devastative and detrimental effect in the organogenesis period of the developing embryos and foetuses. Organogenesis period is highly condemnatory and persuadable. Any injury to embryo during this period leads to dysmorphogenesis or even death AIM: The present study means to evaluate the gross anomalies on developing f o etus subsequent to silver nanoparticle ingestion during the gestational period. MATERIAL & METHOD: Random selections of pregnant Swiss albino mice were selected. AgNPs, of 20 - 100 nm size ra nge, were administered to pregnant mice by repeated oral gavages at concentra tions of 0.5, 1, 5, 10, 15 & 20 mg/kg/day during 4 - 17 gestational day. All dams were subjected to exteriorization on GD 18. The fetuses were evaluated for body malformation effects . RESULTS: Repeated oral gavages treatment with AgNPs at a concentration of 0.5mg/kg/day caused resorption (4.61% and intra uterine growth retardation (7.69% with no gross morphology alteration. 1 mg/kg/day caused resorption (9.23% and intra uterine growth retardation (10.76% with a rare case of haemorrhagic conception (1.53%, 5mg/kg/day caused limb malformation (7.01% resorption (17.54% and intra uterine growth retardation (17.54%, closed type Neural tube deformity (5.26%, 10mg/kg/day caused 20 % of limb malformation including Amelia, foot and tail vein hemorrhages and simple tail vein haemorrhage (3.50% each, resorption (22.80%, intra uterine growth retardation (29.82%, 15mg/kg/day caused severe hemorrhage within the entire body (22.80%, lim b anomaly including syndactyly and oligodactyly (8.77%, resorption (42.10%, intra uterine growth retardation (45.61%, 20mg/kg/day caused Omphalocele (3.27%, Bidiscoidal placental anomaly (9.83%, resorption (29.50% and intra uterine growth retardation (62.29%. CONCLUSION: The results show that a repeated oral dose of AgNPs during pregnancy caused fetal body dysmorphogenesis which is dose

  6. Winter to winter recurrence of atmospheric circulation anomalies over East Asia and its impact on winter surface air temperature anomalies

    Science.gov (United States)

    2017-01-01

    The persistence of atmospheric circulation anomalies over East Asia shows a winter to winter recurrence (WTWR) phenomenon. Seasonal variations in sea level pressure anomalies and surface wind anomalies display significantly different characteristics between WTWR and non-WTWR years. The WTWR years are characterized by the recurrence of both a strong (weak) anomalous Siberian High and an East Asian winter monsoon over two successive winters without persistence through the intervening summer. However, anomalies during the non-WTWR years have the opposite sign between the current and ensuing winters. The WTWR of circulation anomalies contributes to that of surface air temperature anomalies (SATAs), which is useful information for improving seasonal and interannual climate predictions over East Asia and China. In the positive (negative) WTWR years, SATAs are cooler (warmer) over East Asia in two successive winters, but the signs of the SATAs are opposite in the preceding and subsequent winters during the non-WTWR years. PMID:28178351

  7. Winter to winter recurrence of atmospheric circulation anomalies over East Asia and its impact on winter surface air temperature anomalies.

    Science.gov (United States)

    Zhao, Xia; Yang, Guang

    2017-01-01

    The persistence of atmospheric circulation anomalies over East Asia shows a winter to winter recurrence (WTWR) phenomenon. Seasonal variations in sea level pressure anomalies and surface wind anomalies display significantly different characteristics between WTWR and non-WTWR years. The WTWR years are characterized by the recurrence of both a strong (weak) anomalous Siberian High and an East Asian winter monsoon over two successive winters without persistence through the intervening summer. However, anomalies during the non-WTWR years have the opposite sign between the current and ensuing winters. The WTWR of circulation anomalies contributes to that of surface air temperature anomalies (SATAs), which is useful information for improving seasonal and interannual climate predictions over East Asia and China. In the positive (negative) WTWR years, SATAs are cooler (warmer) over East Asia in two successive winters, but the signs of the SATAs are opposite in the preceding and subsequent winters during the non-WTWR years.

  8. Critical point anomalies include expansion shock waves

    Energy Technology Data Exchange (ETDEWEB)

    Nannan, N. R., E-mail: ryan.nannan@uvs.edu [Mechanical Engineering Discipline, Anton de Kom University of Suriname, Leysweg 86, PO Box 9212, Paramaribo, Suriname and Process and Energy Department, Delft University of Technology, Leeghwaterstraat 44, 2628 CA Delft (Netherlands); Guardone, A., E-mail: alberto.guardone@polimi.it [Department of Aerospace Science and Technology, Politecnico di Milano, Via La Masa 34, 20156 Milano (Italy); Colonna, P., E-mail: p.colonna@tudelft.nl [Propulsion and Power, Delft University of Technology, Kluyverweg 1, 2629 HS Delft (Netherlands)

    2014-02-15

    From first-principle fluid dynamics, complemented by a rigorous state equation accounting for critical anomalies, we discovered that expansion shock waves may occur in the vicinity of the liquid-vapor critical point in the two-phase region. Due to universality of near-critical thermodynamics, the result is valid for any common pure fluid in which molecular interactions are only short-range, namely, for so-called 3-dimensional Ising-like systems, and under the assumption of thermodynamic equilibrium. In addition to rarefaction shock waves, diverse non-classical effects are admissible, including composite compressive shock-fan-shock waves, due to the change of sign of the fundamental derivative of gasdynamics.

  9. Chameleon effect and the Pioneer anomaly

    CERN Document Server

    Anderson, John D

    2012-01-01

    The possibility that the apparent anomalous acceleration of the Pioneer 10 and 11 spacecraft may be due, at least in part, to a chameleon field effect is examined. A small spacecraft, with no thin shell, can have a more pronounced anomalous acceleration than a large compact body, such as a planet, having a thin shell. The chameleon effect seems to present a natural way to explain the differences seen in deviations from pure Newtonian gravity for a spacecraft and for a planet, and appears to be compatible with the basic features of the Pioneer anomaly, including the appearance of a jerk term. However, estimates of the size of the chameleon effect indicate that its contribution to the anomalous acceleration is negligible. We conclude that any inverse-square component in the anomalous acceleration is more likely caused by an unmodelled reaction force from solar-radiation pressure, rather than a chameleon field effect.

  10. Phenomenology of deflected anomaly-mediation

    CERN Document Server

    Rattazzi, Riccardo; Wells, J D; Rattazzi, Riccardo; Strumia, Alessandro; Wells, James D.

    2000-01-01

    We explore the phenomenology of a class of models with anomaly-mediated supersymmetry breaking. These models retain the successful flavor properties of the minimal scenario while avoiding the tachyons. The mass spectrum is predicted in terms of a few parameters. However various qualitatively different spectra are possible, often strongly different from the ones usually employed to explore capabilities of new accelerators. One stable feature is the limited spread of the spectrum, so that squarks and gluinos could be conceivably produced at TEVII. The lightest superpartner of standard particles is often a charged slepton or a neutral higgsino. It behaves as a stable particle in collider experiments but it decays at or before nucleosynthesis. We identify the experimental signatures at hadron colliders that can help distinguish this scenario from the usual ones.

  11. Anomalies of the Cosmic Microwave Background

    DEFF Research Database (Denmark)

    Hansen, Martin Anders Kirstejn

    the model itself and the derived cosmological parameters, upon which most of the current astronomy and cosmology rests. In order to ascertain whether the anomalies are the results of systematics from the instruments, incomplete data treatment, residuals from foregrounds affecting the measurement of the true......The Cosmic Microwave Background (CMB) is the faint afterglow of the extreme conditions that existed shortly after Big Bang. The temperature of the CMB radiation across the sky is extremely uniform, yet tiny anisotropies are present, and have with recent satellite missions been mapped to very high...... accuracy. The information which the CMB provides has helped in creating the current standard cosmological model - the CDM model - and the theory of cosmic inflation as well as constrain a vast amount of cosmological parameters. The accuracy of observations of the CMB radiation is thus of extreme importance...

  12. Classifying Star Forming Cores through Chemical Anomalies

    Science.gov (United States)

    Hoq, Sadia; Jackson, J.; Foster, J.

    2011-05-01

    The chemical makeup of Infrared Dark Clouds may offer a method to classify star forming cores. This study uses the molecular line maps from the Millimetre Astronomy Legacy Team 90 GHz (MALT90) Survey, observed using the 22-m ATNF Mopra Telescope. The relative abundances of the four molecules, N2H+, HNC, HCN and HCO+ are calculated for each of 500 cores to determine the chemical signatures of star forming cores in their early evolutionary stages, as deduced from Spitzer data. Cores are classified as prestellar, protostellar, or HII regions. Initial findings indicate that sources with relatively strong N2H+ lines are prestellar, whereas weak N2H+ lines may designate protostellar or HII regions. These chemical anomalies, where the N2H+ lines are either very prominent or weak are rare, suggesting that these are short-lived chemical phases.

  13. Genetics And Tooth Anomalies - An Update

    Directory of Open Access Journals (Sweden)

    Aswathy Brahmanandan

    2013-01-01

    Full Text Available Tooth development like the development of all epithelial appendages is regulated by inductive tissue interactions between epithelium and mesenchyme. Numerous genes interact, either act in conjunction or antagonize each other in odontogenesis. A number of different mesenchymal molecules and their receptors act as mediators in epithelial mesenchymal interactions. Several genes linked with early tooth positioning and developments belong to signaling pathways and have morphogenesis regulatory functions in morphogenesis of other organs. Their mutations often show pleiotropic effects beyond dental morphogenesis. In contrast, certain genes involved in enamel and dentin structures are highly specific for tooth. Mutations in these genes have been identified as causes of Amelogenesis Imperfecta (AI, Dentinogenesis Imperfecta (DI, Dentin Dysplasia (DD and anomalies in tooth number. This article focuses on genetic basis of inherited non-syndromic teeth disorders.

  14. Rare craniofacial anomaly: Tessier no. 2 cleft.

    Science.gov (United States)

    Ozek, C; Gundogan, H; Bilkay, U; Cankayali, R; Guner, U; Gurler, T; Songur, E

    2001-07-01

    Four cases of facial cleft that fit the anatomic description of the rare Tessier no. 2 cleft, with two patients having the no. 12 cleft extending to the cranium as no. 2 clefts, are presented. In all patients, clinical expressions of the anomaly were different. Thus, diverse surgical procedures were used in all cases. These cases and review of the literature help to define the soft-tissue and bony course of these clefts, and also emphasize the role of three-dimensional computed tomography scan imaging to show the bony cleft route. The diagnosis and treatment plan of the no. 2 cleft as well as its cranial counterpart are discussed in this report.

  15. The accessory fallopian tube: A rare anomaly

    Directory of Open Access Journals (Sweden)

    Kusum R Gandhi

    2012-01-01

    Full Text Available This paper presents a rare anatomical variation in the form of accessory fallopian tube on right side. The duplication of fallopian tube was observed in a 34-year-old female during routine undergraduate dissection in our department. Fallopian tube is the part of uterus that carries the ovum from the ovary to the uterus. Accessory fallopian tube is the congenital anomaly attached to the ampullary part of main tube. This accessory tube is common site of pyosalpinx, hydrosalpinx, cystic swelling and torsion. The ovum released by the ovary may also be captured by the blind accessory tube leading to infertility or ectopic pregnancy. Hence, all patients of infertility or pelvic inflammatory disease should be screened to rule out the presence of accessory fallopian tube and if encountered should be removed.

  16. Anomaly induced effects in a magnetic field

    Science.gov (United States)

    Antoniadis, Ignatios; Boyarsky, Alexey; Ruchayskiy, Oleg

    2008-04-01

    We consider a modification of electrodynamics by an additional light massive vector field, interacting with the photon via Chern-Simons-like coupling. This theory predicts observable effects for the experiments studying the propagation of light in an external magnetic field, very similar to those, predicted by theories of axion and axion-like particles. We discuss a possible microscopic origin of this theory from a theory with non-trivial gauge anomaly cancellation between massive and light particles (including, for example, millicharged fermions). Due to the conservation of the gauge current, the production of the new vector field is suppressed at high energies. As a result, this theory can avoid both stellar bounds (which exist for axions) and the bounds from CMB considered recently, allowing for positive results in experiments like ALPS, LIPPS, OSQAR, PVLAS-2, BMV, Q&A, etc.

  17. Anomaly induced effects in a magnetic field

    Energy Technology Data Exchange (ETDEWEB)

    Antoniadis, Ignatios; Boyarsky, Alexey [Department of Physics, CERN, Theory Division, 1211 Geneva 23 (Switzerland); Ruchayskiy, Oleg [Ecole Polytechnique Federale de Lausanne, Institute of Theoretical Physics, FSB/ITP/LPPC, BSP 720, CH-1015 Lausanne (Switzerland)], E-mail: oleg.ruchayskiy@epfl.ch

    2008-04-11

    We consider a modification of electrodynamics by an additional light massive vector field, interacting with the photon via Chern-Simons-like coupling. This theory predicts observable effects for the experiments studying the propagation of light in an external magnetic field, very similar to those, predicted by theories of axion and axion-like particles. We discuss a possible microscopic origin of this theory from a theory with non-trivial gauge anomaly cancellation between massive and light particles (including, for example, millicharged fermions). Due to the conservation of the gauge current, the production of the new vector field is suppressed at high energies. As a result, this theory can avoid both stellar bounds (which exist for axions) and the bounds from CMB considered recently, allowing for positive results in experiments like ALPS, LIPPS, OSQAR, PVLAS-2, BMV, Q and A, etc.

  18. Anomaly induced effects in a magnetic field

    CERN Document Server

    Antoniadis, Ignatios; Ruchayskiy, O

    2008-01-01

    We consider a modification of electrodynamics by an additional light massive vector field, interacting with the photon via Chern-Simons-like coupling. This theory predicts observable effects for the experiments studying the propagation of light in an external magnetic field, very similar to those, predicted by theories of axion and axion-like particles. We discuss a possible microscopic origin of this theory from a theory with non-trivial gauge anomaly cancellation between massive and light particles (including, for example, millicharged fermions). Due to the conservation of the gauge current, the production of the new vector field is suppressed at high energies. As a result, this theory can avoid both stellar bounds (which exist for axions) and the bounds from CMB considered recently, allowing for positive results in experiments like ALPS, LIPPS, OSQAR, PVLAS-2, BMV, Q&A, etc.

  19. Quantum gravitational anomaly as a dark matter

    CERN Document Server

    Kazinski, P O

    2015-01-01

    The general properties of a perfect relativistic fluid resulting from the quantum gravitational anomaly are investigated. It is found that, in the limit of a weak gravitational field, this fluid possesses a polytropic equation of state characterized by two universal constants: the polytropic constant and the natural polytropic index. Based on the astrophysical data, the estimates for the polytropic constant are given. It is shown that this fluid can describe a considerable part of the cold dark matter. The quantum theory of such a fluid is constructed in the framework of the background field method. The Ward identities associated with the entropy and vorticity conservation laws are derived. The leading gradient corrections to the pressure of the perfect fluid are found and the restrictions on their form are obtained. These restrictions guarantee, in particular, the absence of ghosts in the model. The second order nonlinear corrections to the equations of motion of a perfect relativistic fluid are analyzed and...

  20. The accrual anomaly: Evidence from Borsa Istanbul

    Directory of Open Access Journals (Sweden)

    Nasif Ozkan

    2015-06-01

    Full Text Available In this study, we seek to answer whether stock prices fully reflect information in accruals and cash flows about future earnings. Following prior research, we perform Mishkin test and hedge portfolio analysis. The results based on full sample do not indicate mispricing in the components of earnings on Borsa Istanbul. When we exclude loss firms from the full sample, mispricing of total accruals and its components, and thus the presence of accrual anomaly on Borsa Istanbul, is revealed. Using trading strategy based on total accruals of profit firms, investors may generate abnormal returns of 18.58%. These results may suggest that Borsa Istanbul is not efficient in semi-strong form.

  1. Leptoquark Flavor Patterns & B Decay Anomalies

    CERN Document Server

    Hiller, Gudrun; Schönwald, Kay

    2016-01-01

    Flavor symmetries that explain masses and mixings of the standard model fermions dictate flavor patterns for the couplings of scalar and vector leptoquarks to the standard model fermions. A generic feature is that couplings to $SU(2)$-doublet leptons are suppressed at least by one spurion of the discrete non-abelian symmetry breaking, responsible for neutrino mixing, while couplings to charged lepton singlets can be order one. We obtain testable patterns including those that predominantly couple to a single lepton flavor, or two, or in a skewed way. They induce lepton non-universality, which we contrast to current anomalies in $B$-decays. We find maximal effects in $R_{D}$ and $R_{D^*}$ at the level of $\\sim$10 percent and few percent, respectively, while leptoquark effects in $R_{K^{(*)}}$ can reach order few$\\times 10$ percent. Predictions for charm and kaon decays and $\\mu-e$ conversion are worked out.

  2. Resurgent Transseries and the Holomorphic Anomaly

    CERN Document Server

    Santamaría, Ricardo Couso; Schiappa, Ricardo; Vonk, Marcel

    2013-01-01

    The gauge theoretic large N expansion yields an asymptotic series which requires a nonperturbative completion in order to be well defined. Recently, within the context of random matrix models, it was shown how to build resurgent transseries solutions encoding the full nonperturbative information beyond the 't Hooft genus expansion. On the other hand, via large N duality, random matrix models may be holographically described by B-model closed topological strings in local Calabi-Yau geometries. This raises the question of constructing the corresponding holographically dual resurgent transseries, tantamount to nonperturbative topological string theory. This paper addresses this point by showing how to construct resurgent transseries solutions to the holomorphic anomaly equations. These solutions are built upon (generalized) multi-instanton sectors, where the instanton actions are holomorphic. The asymptotic expansions around the multi-instanton sectors have both holomorphic and anti-holomorphic dependence, may a...

  3. DEVELOPMENT OF GRAVITY BOUGUER ANOMALIES OF STATE OF OHIO AND THE ISOSTATIC ANOMALIES IN NORTH ATLANTIC IN FOURIER SERIES

    Science.gov (United States)

    Gravity anomalies were developed in Fourier series in two test areas: 2 x 3 deg area in the State of Ohio, and 10 x 35 deg area in the Atlantic...based only on the original anomaly values and the topography, and the mean gravity anomalies were estimated for the same squares as in the Fourier series method...The result is that this second manual method has smaller standard errors than the Fourier series method, and that this kind of extrapolation

  4. The revised aeromagnetic anomaly map of Italy

    Directory of Open Access Journals (Sweden)

    O. Faggioni

    2004-06-01

    Full Text Available This paper presents the revised aeromagnetic anomaly map of Italy and its surrounding seas, projected at reference altitude of 2500 m and geomagnetic epoch 1979.0. The magnetic data set used for the map compilation is composed of the total intensity field data acquired partly during the aeromagnetic surveys performed by the Italian National Oil Company (Agip - Direzione Esplorazione Idrocarburi between 1971 and 1980, and during the new surveys committed by the Geophysical Corporate Services of Eni Spa - Exploration & Production Division in the years 2001-2002. In both campaigns the recorded data were very dense and uniformly distributed over the examined area. A detailed re-processing of this data set and a re-organization into a new digital database were carried out. The re-processing was done using modern adequate techniques, obtaining a remarkable exploitation of the data information content. The result is a colour shaded relief map that shows on a large scale many of the structural lineaments of the Italian area. The inclusion of a larger number of data and the subtraction of an appropriate magnetic reference field are the main reasons of an enhancement in the anomaly definition. This new map replaces the previous Agip version, and aims to become the reference aeromagnetic cartography of the Italian area. We think this work will be useful both for researchers interested in large scale tectonic studies, and for anyone interested in the investigation of smaller scale structures, such as volcanic complexes or infra-sedimentary magnetic bodies, as well as for mining research.

  5. Determining surface wave arrival angle anomalies

    Science.gov (United States)

    Larson, Erik W. F.; Ekström, Göran

    2002-06-01

    A new method for measuring arrival angles of teleseismic Love and Rayleigh waves is developed. The new method utilizes estimates of surface wave dispersion to create a phase-matched filter to isolate the Love or Rayleigh wave in three-component recordings. The polarization of the filtered wave group is determined in the time domain by application of a variation of the complex polarization method of Vidale [1986]. Orientation, linearity, and ellipticity of particle motion are estimated in several frequency bands to determine the frequency-dependent polarization. The method employs an iterative scheme, by which a predicted Love wave, based on the estimated dispersion and polarization, is subtracted from the three-component data prior to the estimation of Rayleigh wave polarization, and vice versa. The method is applied to an extensive set of Global Seismographic Network data covering the years 1989-1998. Between 4244 and 15,075 measurements are collected for fundamental mode Love and Rayleigh waves at nine different periods (37 to 150 s). Measurement uncertainties are estimated using the statistics of observations for pairwise similar paths and are generally of the order of 15-50% of the total signal, depending on the period and the wave type. Large and azimuthally invariant angle anomalies are documented for several stations and are consistent with misorientation of the horizontal seismometers. Two schemes are employed to determine the misorientations: (1) an azimuthally weighted average at each station, and (2) a joint inversion for seismometer misorientation and globally heterogeneous phase velocities. The determined corrections are robust and correlate well with those reported in earlier studies. Azimuthally varying arrival angle anomalies are shown to agree qualitatively with predictions of wave refraction calculated for recent phase velocity maps, which explain up to 30% of the variance in the new measurements.

  6. Developmental anomaly of ossification type patella partita.

    Science.gov (United States)

    Oohashi, Yoshikazu

    2015-04-01

    Bipartite patella has been recognized as an incidental radiographic finding. However, symptomatic bipartite patella is occasionally diagnosed in adolescents and young athletes. The incidence of bipartite patella has been reported at 0.2-1.7, and 1-2 % of these cases are symptomatic. The purpose of this review article was to discuss current concepts relevant to developmental anomaly of ossification type patella partita. A PubMed database search using the key words "bipartite patella" was performed. Clinical papers reporting the bipartite patella were included. Four German-language studies were also included, three for incidence of bipartite patella and one for classification. A new classification of developmental anomaly of ossification type patella partita based on location and number of fragment was recently proposed. It is simple and useful and applicable to all types of bipartite or tripartite patella. Several imaging studies have reportedly been used to evaluate symptomatic bipartite patella. MRI is currently the most appropriate method used to assess patients with bipartite patella. Although surgical procedures have been developed that reduce excessive traction force by the vastus lateralis muscle on the bipartite fragment, there is not sufficient evidence to support their use for routine treatment of painful bipartite patella. In most symptomatic cases, movement at the interface between the bipartite fragment and the body of the patella presumably causes the pain. Therefore, the existence of apparent motion at the interface should be confirmed by specific imaging studies before surgery. Magnetic resonance imaging findings may provide such evidence by demonstrating a fluid bright signal across the segmentation, typical of pseudoarthrosis. V.

  7. Tricuspid regurgitation

    Science.gov (United States)

    ... and dentist if you have a history of heart valve disease or congenital heart disease before treatment. Some people ... Regurgitation Tricuspid Regurgitation Ebstein's anomaly References Carabello BA. Valvular heart disease. In: Goldman L, Schafer AI, eds. Goldman's Cecil ...

  8. Wolff-Parkinson-White syndrome

    Science.gov (United States)

    ... person triggered ambulatory ECG monitoring, such as a Holter monitor . A test called an electrophysiologic study ( EPS ) ... rhythm - WPW; Rapid heartbeat - WPW Images Ebstein's anomaly Holter heart monitor Conduction system of the heart References ...

  9. Climate Prediction Center (CPC) Zonally Average 500 MB Temperature Anomalies

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This is one of the CPC?s Monthly Atmospheric and SST Indices. It is the 500-hPa temperature anomalies averaged over the latitude band 20oN ? 20oS. The anomalies are...

  10. Automated Network Anomaly Detection with Learning, Control and Mitigation

    Science.gov (United States)

    Ippoliti, Dennis

    2014-01-01

    Anomaly detection is a challenging problem that has been researched within a variety of application domains. In network intrusion detection, anomaly based techniques are particularly attractive because of their ability to identify previously unknown attacks without the need to be programmed with the specific signatures of every possible attack.…

  11. Anomalies of tooth formation in hypohidrotic ectodermal dysplasia

    DEFF Research Database (Denmark)

    Lexner, Michala O; Bardow, Allan; Hertz, Jens Michael;

    2007-01-01

    is the first to elaborate on anomalies of tooth formation found in a group of hemizygous males and heterozygous females with known ED1 mutations. These tooth anomalies may be used as dental biomarkers for heterozygous females, enabling an earlier diagnosis, and therefore, better treatment and genetic...

  12. Maternal age-specific risk of non-chromosomal anomalies

    NARCIS (Netherlands)

    Loane, M.; Dolk, H.; Morris, Joan K.

    To determine the excess risk of non-chromosomal congenital anomaly (NCA) among teenage mothers and older mothers. Population-based prevalence study using data from EUROCAT congenital anomaly registers in 23 regions of Europe in 15 countries, covering a total of 1.75 million births from 2000 to 2004.

  13. A Correlation between Renal Anomalies and Vesicoureteral Reflux

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Seung Soo; Kim, Young Tong; Kim, Il Young; Shin, Hyeong Cheol [Dept. of Radiology, Cheonan Hospital, Soonchunhyang University College of Medicine, Cheonan (Korea, Republic of)

    2011-12-15

    To investigate the frequency of vesicoureteral reflux (VUR) in children with renal anomalies a evaluate the correlation between renal anomalies and VUR. Eighty-one children (1 day-8 years) with renal anomalies underwent voiding cystourethrogram between 2006 and 2009 were reviewed. This study included ureteropelvic junction stenosis (n = 32), ureteropelvic duplication (n = 20), multicystic dysplastic kidney (n = 12), fusion anomaly (n = 11), renal agenesis (n = 3), unilateral renal hypoplasia (n = 2), and ectopic kidney (n = 1). The frequency, grade, and location of VUR were evaluated. The grade of VUR according to age and anomaly type was statistically analyzed, and the patients with VUR were followed. The VUR was present in 14 (17.3%); ipsilateral VUR was present in 8 (57.1%), bilateral VUR in 4 (28.6%), and contralateral VUR in 2 (14.2%). VUR was detected in 9 patients under the age of one. There was no statistical correlation between VUR grade and either age or anomaly type of the nine patients showed continuous VUR on up. The frequency of VUR in children with renal anomalies was 17.3%. VUR was most frequently detected in children under the age of one, and VUR grade was not related to age and anomaly type.

  14. Online Anomaly Energy Consumption Detection Using Lambda Architecture

    DEFF Research Database (Denmark)

    Liu, Xiufeng; Iftikhar, Nadeem; Nielsen, Per Sieverts;

    2016-01-01

    With the widely use of smart meters in the energy sector, anomaly detection becomes a crucial mean to study the unusual consumption behaviors of customers, and to discover unexpected events of using energy promptly. Detecting consumption anomalies is, essentially, a real-time big data analytics p...

  15. Multicriteria Similarity-Based Anomaly Detection Using Pareto Depth Analysis.

    Science.gov (United States)

    Hsiao, Ko-Jen; Xu, Kevin S; Calder, Jeff; Hero, Alfred O

    2016-06-01

    We consider the problem of identifying patterns in a data set that exhibits anomalous behavior, often referred to as anomaly detection. Similarity-based anomaly detection algorithms detect abnormally large amounts of similarity or dissimilarity, e.g., as measured by the nearest neighbor Euclidean distances between a test sample and the training samples. In many application domains, there may not exist a single dissimilarity measure that captures all possible anomalous patterns. In such cases, multiple dissimilarity measures can be defined, including nonmetric measures, and one can test for anomalies by scalarizing using a nonnegative linear combination of them. If the relative importance of the different dissimilarity measures are not known in advance, as in many anomaly detection applications, the anomaly detection algorithm may need to be executed multiple times with different choices of weights in the linear combination. In this paper, we propose a method for similarity-based anomaly detection using a novel multicriteria dissimilarity measure, the Pareto depth. The proposed Pareto depth analysis (PDA) anomaly detection algorithm uses the concept of Pareto optimality to detect anomalies under multiple criteria without having to run an algorithm multiple times with different choices of weights. The proposed PDA approach is provably better than using linear combinations of the criteria, and shows superior performance on experiments with synthetic and real data sets.

  16. Hawking Radiation from Plane Symmetric Black Hole Covariant Anomaly

    Institute of Scientific and Technical Information of China (English)

    ZENG Xiao-Xiong; HAN Yi-Wen; YANG Shu-Zheng

    2009-01-01

    Based on the covariant anomaly cancellation method, which is believed to be more refined than the initial approach of Robinson and Wilczek, we discuss Hawking radiation from the plane symmetric black hole. The result shows that Hawking radiation from the non-spherical symmetric black holes also can be derived from the viewpoint of anomaly.

  17. Systematic review of central nervous system anomalies in incontinentia pigmenti

    Directory of Open Access Journals (Sweden)

    Minić Snežana

    2013-02-01

    Full Text Available Abstract The objective of this study was to present a systematic review of the central nervous system (CNS types of anomalies and to consider the possibility to include CNS anomalies in Incontinentia pigmenti (IP criteria. The analyzed literature data from 1,393 IP cases were from the period 1993–2012. CNS anomalies were diagnosed for 30.44% of the investigated IP patients. The total number of CNS types of anomalies per patient was 1.62. In the present study there was no significantly higher number of anomalies per patient in females than males. The most frequent CNS types of anomalies were seizures, motor impairment, mental retardation, and microcephaly. The most frequently registered CNS lesions found using brain imaging methods were brain infarcts or necrosis, brain atrophies, and corpus callosum lesions. IKBKG exon 4–10 deletion was present in 86.00% of genetically confirmed IP patients. The frequency of CNS anomalies, similar to the frequency of retinal anomalies in IP patients, concurrent with their severity, supports their recognition in the list of IP minor criteria.

  18. Heat kernel for Newton-Cartan trace anomalies

    Energy Technology Data Exchange (ETDEWEB)

    Auzzi, Roberto [Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Via Musei 41, Brescia, 25121 (Italy); INFN Sezione di Perugia, Via A. Pascoli, Perugia, 06123 (Italy); Nardelli, Giuseppe [Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Via Musei 41, Brescia, 25121 (Italy); TIFPA - INFN, Università di Trento,c/o Dipartimento di Fisica, Povo, TN, 38123 (Italy)

    2016-07-11

    We compute the leading part of the trace anomaly for a free non-relativistic scalar in 2+1 dimensions coupled to a background Newton-Cartan metric. The anomaly is proportional to 1/m, where m is the mass of the scalar. We comment on the implications of a conjectured a-theorem for non-relativistic theories with boost invariance.

  19. Load characterization and anomaly detection for voice over IP traffic

    NARCIS (Netherlands)

    M.R.H. Mandjes (Michel); I. Saniee; A. Stolyar

    2005-01-01

    textabstractWe consider the problem of traffic anomaly detection in IP networks. Traffic anomalies typically arise when there is focused overload or when a network element fails and it is desired to infer these purely from the measured traffic. We derive new general formulae for the variance of the

  20. Chiral anomalies in N=1 supersymmetric Yang-Mills theories

    Energy Technology Data Exchange (ETDEWEB)

    Girardi, G.; Grimm, R.; Stora, R. (Grenoble-1 Univ., 74 - Annecy (France). Lab. de Physique des Particules)

    1985-06-20

    We establish a manifestly supersymmetric, compact, formula for the chiral anomalies of supersymmetric gauge theories. This result is obtained by combining superspace geometry with the usual algebra of anomalies. Except for a Wess-Zumino type term, we obtain an expression which is polynomial in the coefficients of the superconnection form.

  1. Present Status of b -> s l+ l- Anomalies

    CERN Document Server

    Mahmoudi, Farvah; Neshatpour, Siavash

    2016-01-01

    We discuss the observed deviations in b -> s l+ l- processes from the Standard Model predictions and present global fits for the New Physics description of these anomalies. We further investigate the stability of the global fits under different theoretical assumptions and suggest strategies and a number of observables to clear up the source of the anomalies.

  2. Maternal age-specific risk of non-chromosomal anomalies

    NARCIS (Netherlands)

    Loane, M.; Dolk, H.; Morris, Joan K.

    2009-01-01

    To determine the excess risk of non-chromosomal congenital anomaly (NCA) among teenage mothers and older mothers. Population-based prevalence study using data from EUROCAT congenital anomaly registers in 23 regions of Europe in 15 countries, covering a total of 1.75 million births from 2000 to 2004.

  3. Is an isolated cleft lip an isolated anomaly?

    NARCIS (Netherlands)

    Deelder, J. D.; Breugem, C. C.; de Vries, Iris; de Bruin, M.; van der Molen, A. B. Mink; van der Horst, C. M. A. M.

    Introduction: It is well known that patients with cleft lip/palate or cleft palate can have associated anomalies. However, there is a relative paucity of information about the possible anomalies associated with an isolated cleft lip. A recent study (Vallino et al., 2008) showed that children with

  4. Anomalies in B-decays and U(2) flavor symmetry

    Energy Technology Data Exchange (ETDEWEB)

    Barbieri, Riccardo [Institute of Theoretical Studies, Zurich (Switzerland); Scuola Normale Superiore, INFN, Pisa (Italy); Isidori, Gino [Universitaet Zuerich, Physik-Institut, Zurich (Switzerland); Laboratori Nazionali di Frascati, INFN, Frascati (Italy); Pattori, Andrea [Universitaet Zuerich, Physik-Institut, Zurich (Switzerland); Universita di Padova, Dipartimento di Fisica e Astronomia ' G. Galilei' , Padua (Italy); Senia, Fabrizio [Scuola Normale Superiore, INFN, Pisa (Italy)

    2016-02-15

    The collection of a few anomalies in semileptonic B-decays invites to speculate about the emergence of some strikingly new phenomena. Here we offer a possible interpretation of these anomalies in the context of a weakly broken U(2){sup 5} flavor symmetry and leptoquark mediators. (orig.)

  5. EUROCAT website data on prenatal detection rates of congenital anomalies

    DEFF Research Database (Denmark)

    Garne, Ester; Dolk, Helen; Loane, Maria

    2010-01-01

    The EUROCAT website www.eurocat-network.eu publishes prenatal detection rates for major congenital anomalies using data from European population-based congenital anomaly registers, covering 28% of the EU population as well as non-EU countries. Data are updated annually. This information can...

  6. Turtle carapace anomalies: the roles of genetic diversity and environment.

    Directory of Open Access Journals (Sweden)

    Guillermo Velo-Antón

    Full Text Available BACKGROUND: Phenotypic anomalies are common in wild populations and multiple genetic, biotic and abiotic factors might contribute to their formation. Turtles are excellent models for the study of developmental instability because anomalies are easily detected in the form of malformations, additions, or reductions in the number of scutes or scales. METHODOLOGY/PRINCIPAL FINDINGS: In this study, we integrated field observations, manipulative experiments, and climatic and genetic approaches to investigate the origin of carapace scute anomalies across Iberian populations of the European pond turtle, Emys orbicularis. The proportion of anomalous individuals varied from 3% to 69% in local populations, with increasing frequency of anomalies in northern regions. We found no significant effect of climatic and soil moisture, or climatic temperature on the occurrence of anomalies. However, lower genetic diversity and inbreeding were good predictors of the prevalence of scute anomalies among populations. Both decreasing genetic diversity and increasing proportion of anomalous individuals in northern parts of the Iberian distribution may be linked to recolonization events from the Southern Pleistocene refugium. CONCLUSIONS/SIGNIFICANCE: Overall, our results suggest that developmental instability in turtle carapace formation might be caused, at least in part, by genetic factors, although the influence of environmental factors affecting the developmental stability of turtle carapace cannot be ruled out. Further studies of the effects of environmental factors, pollutants and heritability of anomalies would be useful to better understand the complex origin of anomalies in natural populations.

  7. Statistical Anomaly Detection for Monitoring of Human Dynamics

    Science.gov (United States)

    Kamiya, K.; Fuse, T.

    2015-05-01

    Understanding of human dynamics has drawn attention to various areas. Due to the wide spread of positioning technologies that use GPS or public Wi-Fi, location information can be obtained with high spatial-temporal resolution as well as at low cost. By collecting set of individual location information in real time, monitoring of human dynamics is recently considered possible and is expected to lead to dynamic traffic control in the future. Although this monitoring focuses on detecting anomalous states of human dynamics, anomaly detection methods are developed ad hoc and not fully systematized. This research aims to define an anomaly detection problem of the human dynamics monitoring with gridded population data and develop an anomaly detection method based on the definition. According to the result of a review we have comprehensively conducted, we discussed the characteristics of the anomaly detection of human dynamics monitoring and categorized our problem to a semi-supervised anomaly detection problem that detects contextual anomalies behind time-series data. We developed an anomaly detection method based on a sticky HDP-HMM, which is able to estimate the number of hidden states according to input data. Results of the experiment with synthetic data showed that our proposed method has good fundamental performance with respect to the detection rate. Through the experiment with real gridded population data, an anomaly was detected when and where an actual social event had occurred.

  8. Is an isolated cleft lip an isolated anomaly?

    NARCIS (Netherlands)

    Deelder, J. D.; Breugem, C. C.; de Vries, Iris; de Bruin, M.; van der Molen, A. B. Mink; van der Horst, C. M. A. M.

    2011-01-01

    Introduction: It is well known that patients with cleft lip/palate or cleft palate can have associated anomalies. However, there is a relative paucity of information about the possible anomalies associated with an isolated cleft lip. A recent study (Vallino et al., 2008) showed that children with cl

  9. Congenital pouch colon: Increasing association with low anorectal anomalies

    Directory of Open Access Journals (Sweden)

    Pavai Arunachalam

    2009-01-01

    Full Text Available Three cases of type IV congenital pouch colon associated with low anorectal anomaly are reported here. Pouch colon may be a cause of intractable constipation in children operated for low anorectal anomaly. Excellent results can be obtained by exicision of the pouch. The radiological and pathological features of this condition are discussed.

  10. Arctic dipole anomaly and summer rainfall in Northeast China

    Institute of Scientific and Technical Information of China (English)

    WU BingYi; ZHANG RenHe; D'Arrigo ROSANNE

    2008-01-01

    A dipole structure anomaly in summer Arctic atmospheric variability is identified in this study, which is characterized by the second mode of empirical orthogonal function (EOF) analysis of summer monthly mean sea level pressure (SLP) north of 70°N, accounting for 12.94% of the variance. The dipole anom-aly shows a quasi-barotropic structure with opposite anomalous centers over the Canadian Arctic and the Beaufort Sea and between the Kara Sea and the Laptev Sea. The dipole anomaly reflects alternating variations in location of the polar vortex between the western and eastern Arctic regions. The positive phase of the dipole anomaly corresponds to the center of the polar vortex over the western Arctic, leading to an increase in summer mean rainfall in Northeast China. The dipole anomaly has a pre-dominant 6-year periodicity, and shows interdecadal variations in recent decades.

  11. Minor physical anomalies and schizophrenia spectrum disorders: a prospective investigation

    DEFF Research Database (Denmark)

    Schiffman, Jason; Ekstrøm, Morten; LaBrie, Joseph

    2002-01-01

    OBJECTIVE: The authors prospectively assessed the relationship between minor physical anomalies identified in childhood and adult psychiatric outcome. METHOD: In 1972, minor physical anomalies were measured in a group of 265 Danish children ages 11-13. The examination was part of a larger study...... at high risk. RESULTS: Individuals with a high number of minor physical anomalies developed schizophrenia spectrum disorders significantly more often than they developed a no mental illness outcome. Further, individuals with a high number of minor physical anomalies tended to develop schizophrenia...... spectrum disorders more often than other psychopathology. Among individuals at genetic high risk, higher numbers of minor physical anomalies may interact with pre-existing vulnerabilities for schizophrenia to increase the likelihood of a schizophrenia spectrum disorder outcome. CONCLUSIONS: Minor physical...

  12. Spectrum of bronchopulmonary anomalies associated with tracheoesophageal malformations

    Energy Technology Data Exchange (ETDEWEB)

    Benson, J.E.; Fletcher, B.D.; Olsen, M.

    1985-09-01

    The combination of tracheoesophageal and pulmonary malformations is unusual and reportedly carries a high mortality. We have observed six patients with esophageal atresia and tracheoesophageal fistula and one with a bronchoesophageal fistula who had associated bronchopulmonary anomalies ranging from lobar hypoplasia and agenesis to unilateral pulmonary hypoplasia or agenesis. All of the pulmonary malformations were right-sided. Vertebral or rib anomalies were present in five patients, congenital heart disease in two, imperforate anus in one and one patient had radial aplasia and Pierre Robin syndrome. The bronchopulmonary anomalies complicated the surgical care of tracheoesophageal malformations and required radiologic differentiation from aspiration pneumonia and atelectasis. Six of the seven patients survived. Mortality and morbidity were related to complications and associated cardiac anomalies as well as severity of the lung anomaly.

  13. Infrared medical image visualization and anomalies analysis method

    Science.gov (United States)

    Gong, Jing; Chen, Zhong; Fan, Jing; Yan, Liang

    2015-12-01

    Infrared medical examination finds the diseases through scanning the overall human body temperature and obtaining the temperature anomalies of the corresponding parts with the infrared thermal equipment. In order to obtain the temperature anomalies and disease parts, Infrared Medical Image Visualization and Anomalies Analysis Method is proposed in this paper. Firstly, visualize the original data into a single channel gray image: secondly, turn the normalized gray image into a pseudo color image; thirdly, a method of background segmentation is taken to filter out background noise; fourthly, cluster those special pixels with the breadth-first search algorithm; lastly, mark the regions of the temperature anomalies or disease parts. The test is shown that it's an efficient and accurate way to intuitively analyze and diagnose body disease parts through the temperature anomalies.

  14. Weather anomalies affect Climate Change microblogging intensity

    Science.gov (United States)

    Molodtsova, T.; Kirilenko, A.

    2012-12-01

    There is a huge gap between the scientific consensus and public understanding of climate change. Climate change has become a political issue and a "hot" topic in mass media that only adds the complexity to forming the public opinion. Scientists operate in scientific terms, not necessarily understandable by general public, while it is common for people to perceive the latest weather anomaly as an evidence of climate change. In 1998 Hansen et al. introduced a concept of an objectively measured subjective climate change indicator, which can relate public feeling that the climate is changing to the observed meteorological parameters. We tested this concept in a simple example of a temperature-based index, which we related to microblogging activity. Microblogging is a new form of communication in which the users describe their current status in short Internet messages. Twitter (http://twitter.com), is currently the most popular microblogging platform. There are multiple reasons, why this data is particularly valuable to the researches interested in social dynamics: microblogging is widely used to publicize one's opinion with the public; has broad, diverse audience, represented by users from many countries speaking different languages; finally, Twitter contains an enormous number of data, e.g., there were 1,284,579 messages related to climate change from 585,168 users in the January-May data collection. We collected the textual data entries, containing words "climate change" or "global warming" from the 1st of January, 2012. The data was retrieved from the Internet every 20 minutes using a specially developed Python code. Using geolocational information, blog entries originating from the New York urbanized area were selected. These entries, used as a source of public opinion on climate change, were related to the surface temperature, obtained from La Guardia airport meteorological station. We defined the "significant change" in the temperature index as deviation of the

  15. Multiple congenital ocular anomalies in Icelandic horses

    Directory of Open Access Journals (Sweden)

    Lindgren Gabriella

    2011-05-01

    Full Text Available Abstract Background Multiple congenital ocular anomalies (MCOA syndrome is a hereditary congenital eye defect that was first described in Silver colored Rocky Mountain horses. The mutation causing this disease is located within a defined chromosomal interval, which also contains the gene and mutation that is associated with the Silver coat color (PMEL17, exon 11. Horses that are homozygous for the disease-causing allele have multiple defects (MCOA-phenotype, whilst the heterozygous horses predominantly have cysts of the iris, ciliary body or retina (Cyst-phenotype. It has been argued that these ocular defects are caused by a recent mutation that is restricted to horses that are related to the Rocky Mountain Horse breed. For that reason we have examined another horse breed, the Icelandic horse, which is historically quite divergent from Rocky Mountain horses. Results We examined 24 Icelandic horses and established that the MCOA syndrome is present in this breed. Four of these horses were categorised as having the MCOA-phenotype and were genotyped as being homozygous for the PMEL17 mutation. The most common clinical signs included megaloglobus, iris stromal hypoplasia, abnormal pectinate ligaments, iridociliary cysts occasionally extending into the peripheral retina and cataracts. The cysts and pectinate ligament abnormalities were observed in the temporal quadrant of the eyes. Fourteen horses were heterozygous for the PMEL17 mutation and were characterized as having the Cyst-phenotype with cysts and occasionally curvilinear streaks in the peripheral retina. Three additional horses were genotyped as PMEL17 heterozygotes, but in these horses we were unable to detect cysts or other forms of anomalies. One eye of a severely vision-impaired 18 month-old stallion, homozygous for the PMEL17 mutation was examined by light microscopy. Redundant duplication of non-pigmented ciliary body epithelium, sometimes forming cysts bulging into the posterior chamber

  16. Developmental Venous Anomaly: Benign or Not Benign

    Science.gov (United States)

    AOKI, Rie; SRIVATANAKUL, Kittipong

    2016-01-01

    Developmental venous anomalies (DVAs), previously called venous angiomas, are the most frequently encountered cerebral vascular malformations. However, DVA is considered to be rather an extreme developmental anatomical variation of medullary veins than true malformation. DVAs are composed of dilated medullary veins converging centripetally into a large collecting venous system that drains into the superficial or deep venous system. Their etiology and mechanism are generally accepted that DVAs result from the focal arrest of the normal parenchymal vein development or occlusion of the medullary veins as a compensatory venous system. DVAs per se are benign and asymptomatic except for under certain unusual conditions. The pathomechanisms of symptomatic DVAs are divided into mechanical, flow-related causes, and idiopathic. However, in cases of DVAs associated with hemorrhage, cavernous malformations (CMs) are most often the cause rather than DVAs themselves. The coexistence of CM and DVA is common. There are some possibilities that DVA affects the formation and clinical course of CM because CM related to DVA is generally located within the drainage territory of DVA and is more aggressive than isolated CM in the literature. Brain parenchymal abnormalities surrounding DVA and cerebral varix have also been reported. These phenomena are considered to be the result of venous hypertension associated with DVAs. With the advance of diagnostic imagings, perfusion study supports this hypothesis demonstrating that some DVAs have venous congestion pattern. Although DVAs should be considered benign and clinically silent, they can have potential venous hypertension and can be vulnerable to hemodynamic changes. PMID:27250700

  17. Pathology of cloaca anomalies with case correlation.

    Science.gov (United States)

    Gupta, Anita; Bischoff, Andrea

    2016-04-01

    During the fourth week of human embryo development, a transient common channel known as a cloaca is formed from which three cavities with three external orifices arises. Cloaca anomalies occur when there is failure of separation of the rectum, vagina, and urethra channel resulting in a single drain into the perineum. In our previous institutional studies, Runck et al. compared human and mouse cloaca development and found early mis-patterning of the embryonic cloaca deranged hedgehog and bone morphogenetic proteins (BMP) signaling. Also, our group reported the embryological correlation of the epithelial and stromal histology found in step sections of the common channel in 14 cloaca malformations in humans. In this review, we present the pathology of a 4-year-old female with a cloaca and VACTERL complex, and summarize our current knowledge of cloaca pathology. Furthermore, we suggest that careful pathological examination of cloaca specimens in conjunction with surgical orientation may result in a better understanding of the etiology of this condition. Published by Elsevier Inc.

  18. Casimir energies: temperature dependence, dispersion, and anomalies.

    Science.gov (United States)

    Brevik, I; Milton, K A

    2008-07-01

    Assuming the conventional Casimir setting with two thick parallel perfectly conducting plates of large extent with a homogeneous and isotropic medium between them, we discuss the physical meaning of the electromagnetic field energy W disp when the intervening medium is weakly dispersive but nondissipative. The presence of dispersion means that the energy density contains terms of the form d[omega epsilon(omega)]/d omega and d[omega mu(omega)]/d omega . We find that, as W disp refers thermodynamically to a nonclosed physical system, it is not to be identified with the internal thermodynamic energy U following from the free energy F , or the electromagnetic energy W , when the last-mentioned quantities are calculated without such dispersive derivatives. To arrive at this conclusion, we adopt a model in which the system is a capacitor, linked to an external self-inductance L such that stationary oscillations become possible. Therewith the model system becomes a nonclosed one. As an introductory step, we review the meaning of the nondispersive energies, F , U , and W . As a final topic, we consider an anomaly connected with local surface divergences encountered in Casimir energy calculations for higher space-time dimensions, D>4 , and discuss briefly its dispersive generalization. This kind of application is essentially a generalization of the treatment of Alnes [J. Phys. A 40, F315 (2007)] to the case of a medium-filled cavity between two hyperplanes.

  19. Space Telescope Fine Guidance Sensor Bearing Anomaly

    Science.gov (United States)

    Loewenthal, S.; Esper, J.; Pan, J.; Decker, J.

    1996-01-01

    Early in 1993, a servo motor within one of three Fine Guidance Sensors (FGS) aboard the Hubble Space Telescope (HST) reached stall torque levels on several occasions. Little time was left to plan replacement during the first servicing mission, scheduled at the end of '93. Accelerated bearing life tests confirmed that a small angle rocking motion, known as Coarse Track (CT), accelerated bearing degradation. Saturation torque levels were reached after approximately 20 million test cycles, similar to the flight bearings. Reduction in CT operation, implemented in flight software, extended FGS life well beyond the first servicing mission. However in recent years, bearing torques have resumed upward trends and together with a second, recent bearing torque anomaly has necessitated a scheduled FGS replacement during the upcoming second servicing mission in '97. The results from two series of life tests to quantify FGS bearing remaining life, discussion of bearing on-orbit performance, and future plans to service the FGS servos are presented in this paper.

  20. Prenatal ultrasonographic findings of cloacal anomaly

    Energy Technology Data Exchange (ETDEWEB)

    Song, Mi Jin [Samsung Cheil Hospital, Sungkyunkwan University School of Medicine, Seoul (Korea, Republic of)

    2002-09-15

    To evaluate the ultrasonographic characteristic of a rare malformation comples, Cloacal anomaly on prenatal ultrasonography. From March 1991 to July 2001, eight cases with the persistent cloaca (4 cases in female and 1 case in male) and cloacal exstrophy (3 cases) diagnosed by prenatal ultrasound examination were included, and all of them were pathologically confirmed by autopsy. One radiologist retrospectively analyzed the prenatal sonographic images, including the urinary bladder, kidney, pelvic cyst, abdominal wall defect and amount of amniotic fluid. The ultrasonographic diagnosis was established at 21.8 {+-} 7.8 weeks of gestation. The prenatal ultrasonographic findings of the persistent cloaca were absent bladder (n=2), distended bladder (n=2) and small thick bladder (n=1). Sonography of the kidney showed normal (n=2), hydronephrosis (n=1), dysplasia (n=1) and unilateral hydronephrosis with absent contralateral kidney (n=1). Four fetuses showed septated pelvic cyst; three fetuses, oligohydramnios. The prenatal ultrasonographic findings of cloacal exstrophy included absent bladder (n=3), normal kidney (n=1), hydronephrosis (n=1) and absent kidney (n=1). All fetuses with cloacal exstrophy had abdominal wall defect while two of them had oligohydramnios. A prenatal diagnosis of persistent cloaca can be confidently made when there is septated pelvic cyst combined oligohydramnios, sediments within the cyst and intraluminal calcifications. Cloacal exstrophy should be included in diagnosis if there is a low abdominal wall defect with absent urinary bladder.

  1. Developmental venous anomaly in the newborn brain

    Energy Technology Data Exchange (ETDEWEB)

    Horsch, S. [Erasmus MC-Sophia Children' s Hospital, Department of Neonatology, Rotterdam (Netherlands); Helios Klinikum Berlin-Buch, Department of Neonatology, Berlin (Germany); Govaert, P. [Erasmus MC-Sophia Children' s Hospital, Department of Neonatology, Rotterdam (Netherlands); Cowan, F.M. [Hammersmith Hospital, Department of Paediatrics, Imperial College Healthcare NHS Trust, London (United Kingdom); Benders, M.J.N.L.; Groenendaal, F.; Vries, L.S. de [University Medical Centre Utrecht, Wilhelmina Children' s Hospital, Department of Neonatology, Utrecht (Netherlands); Lequin, M.H. [Erasmus MC/Sophia Children' s Hospital, Department of Paediatric Radiology, Rotterdam (Netherlands); Saliou, G. [University Hospital, Department of Neuroradiology, Le Kremlin-Bicetre (France)

    2014-07-15

    Cerebral developmental venous anomaly (DVA) is considered a benign anatomical variant of parenchymal venous drainage; it is the most common vascular malformation seen in the adult brain. Despite its assumed congenital origin, little is known about DVA in the neonatal brain. We report here the first cohort study of 14 neonates with DVA. Fourteen infants (seven preterm) with DVA diagnosed neonatally using cranial ultrasound (cUS) and magnetic resonance imaging (MRI) from three tertiary neonatal units over 14 years are reviewed. DVA was first detected on cUS in 6 and on MRI in 8 of the 14 infants. The cUS appearances of DVA showed a focal fairly uniform area of increased echogenicity, often (86 %) adjacent to the lateral ventricle and located in the frontal lobe (58 %). Blood flow in the dilated collector vein detected by Doppler ultrasound (US) varied between cases (venous flow pattern in ten and arterialized in four). The appearance on conventional MRI was similar to findings in adults. Serial imaging showed a fairly constant appearance to the DVAs in some cases while others varied considerably regarding anatomical extent and flow velocity. This case series underlines that a neonatal diagnosis of DVA is possible with carefully performed cUS and MRI and that DVA tends to be an incidental finding with a diverse spectrum of imaging appearances. Serial imaging suggests that some DVAs undergo dynamic changes during the neonatal period and early infancy; this may contribute to why diagnosis is rare at this age. (orig.)

  2. Accrual Anomaly in the Brazilian Capital Market

    Directory of Open Access Journals (Sweden)

    César Medeiros Cupertino

    2012-10-01

    Full Text Available This paper analyzes the phenomenon known as accrual anomaly in Brazil. In particular, we examine two hypotheses: (a that the earnings expectation included in the stock price fails to reflect the difference in persistence of the earnings components (accruals and cash flows; and (b that the construction of a hedge portfolio by taking a long (short position in assets with low (high accruals generates consistently abnormal returns. The data set includes nonfinancial firms listed on the BM&FBOVESPA between 1990 and 2008. The empirical tests required conducting panel data regressions to identify the persistence of earnings and theircomponents; the Mishkin test to identify whether the market rationally prices earnings; and the composition of a zero-investment (hedge portfolio to analyze whether a trading strategy based on accruals consistently provides abnormal positive returns. The results indicate that the accrual component is not mispriced by the Brazilian market, and that a trading strategy based on accruals does not provide consistently positive returns. Although this evidence does not encourage arbitrage, the results are relevant from various perspectives. The methodology applied permitted identifying the quality of earnings and of their components, as well as association between the components of earnings and returns.

  3. The Voyager Anomaly and the GEM Theory

    Science.gov (United States)

    Brandenburg, J. E.

    For over a decade, the Pioneer Anomaly (PA) was an object of study and remains unresolved. Basically it is a sunward constant acceleration of the spacecraft that appeared unambiguously after the satellites passage beyond Saturn. It now appears possible the PA acceleration is the appearance of second, string-like, solution to the Einstein Equations first discussed in the context of charged finite mass charged particle potentials as part of the GEM theory. The exact solution to the metric equations is similar in form to the Schwartzchild Solution but with a positive sign: grr = (1 + rG/r)-1 where rG is a characteristic radius corresponding to the Schwartzchild radius. Adopting the approximation that for weak fields the metric becomes a Newtonian gravity potential: grr ≅-2ϕ, a string potential form is obtained in the limit grr ≅1-2ϕ, for r acceleration a ≅ c/TH = 8 x 10-10 m/sec2 in agreement with observations. The "turn on" for this potential apparently occurs with the encounter with Jupiter, which raised the spacecraft to above escape velocity. The possible physical meaning of this second metric appearance is found to be a gravitational form of Lenz's law, where objects departing from gravity potentials experience a resistance that keeps them bound at long distances.

  4. Visual anomalies and display night vision goggles

    Science.gov (United States)

    Jarrett, Donald N.; Ineson, Judith; Cheetham, Mark

    2003-09-01

    A brief study has been conducted to investigate several visual anomalies reported by test pilots using a Display Night Vision Goggle (DNVG) that superimposed symbols onto the intensified image seen by the right eye. A survey of relevant research suggests that one oddity, an apparent focus mis-match between the scene image and the injected symbols, is an irremovable facet of the perception of bright, contrasting, overlaid symbols. A second oddity, an uncomfortable and distracting blurring of the under-stimulated left eye during periods of flight in cloud, was eventually experienced by several people in a laboratory simulation, the effect being more noticeable if the under-stimulated eye was the dominant eye. A subsequent apparent enlargement of the HUD symbols and a post-flight focussing delay by the left eye seemed to be after-effects of whatever caused the ocular discomfort. As about 30% of the population are left eye dominant, the disturbing discomfort and aftermath could affect this proportion of pilots using a right-eye DNVG. Although further work is needed to understand the phenomena, it would be wise to warn aircrew and enable the symbol injection unit to be fitted to either channel of the DNVG.

  5. Computational simulation of liquid rocket injector anomalies

    Science.gov (United States)

    Przekwas, A. J.; Singhal, A. K.; Tam, L. T.; Davidian, K.

    1986-01-01

    A computer model has been developed to analyze the three-dimensional two-phase reactive flows in liquid fueled rocket combustors. The model is designed to study the influence of liquid propellant injection nonuniformities on the flow pattern, combustion and heat transfer within the combustor. The Eulerian-Lagrangian approach for simulating polidisperse spray flow, evaporation and combustion has been used. Full coupling between the phases is accounted for. A nonorthogonal, body fitted coordinate system along with a conservative control volume formulation is employed. The physical models built into the model include a kappa-epsilon turbulence model, a two-step chemical reaction, and the six-flux radiation model. Semiempirical models are used to describe all interphase coupling terms as well as chemical reaction rates. The purpose of this study was to demonstrate an analytical capability to predict the effects of reactant injection nonuniformities (injection anomalies) on combustion and heat transfer within the rocket combustion chamber. The results show promising application of the model to comprehensive modeling of liquid propellant rocket engines.

  6. On the IceCube spectral anomaly

    CERN Document Server

    Palladino, Andrea; Vissani, Francesco

    2016-01-01

    Recently it was noted that different IceCube datasets are not consistent with the same power law spectrum of the cosmic neutrinos: this is the IceCube spectral anomaly, that suggests that they observe a multicomponent spectrum. In this work, the main possibilities to enhance the description in terms of a single extragalactic neutrino component are examined. The hypothesis of a sizable contribution of Galactic high-energy neutrino events distributed as $E^{-2.7}$ [ApJ 826, 185 (2016)] is critically analyzed and its natural generalization is considered. The stability of the expectations is studied by introducing free parameters, motivated by theoretical considerations and observational facts. The upgraded model here examined has 1)~a Galactic component with different normalization and shape $E^{- 2.4}$; 2)~an extragalactic neutrino spectrum based on new data; 3)~a non-zero prompt component of atmospheric neutrinos. The two key predictions of the model concern the `high-energy starting events' collected from the...

  7. On the IceCube spectral anomaly

    Science.gov (United States)

    Palladino, Andrea; Spurio, Maurizio; Vissani, Francesco

    2016-12-01

    Recently it was noted that different IceCube datasets are not consistent with the same power law spectrum of the cosmic neutrinos: this is the IceCube spectral anomaly, that suggests that they observe a multicomponent spectrum. In this work, the main possibilities to enhance the description in terms of a single extragalactic neutrino component are examined. The hypothesis of a sizable contribution of Galactic high-energy neutrino events distributed as E‑2.7 [Astrophys. J. 826 (2016) 185] is critically analyzed and its natural generalization is considered. The stability of the expectations is studied by introducing free parameters, motivated by theoretical considerations and observational facts. The upgraded model here examined has 1) a Galactic component with different normalization and shape E‑2.4 2) an extragalactic neutrino spectrum based on new data; 3) a non-zero prompt component of atmospheric neutrinos. The two key predictions of the model concern the `high-energy starting events' collected from the Southern sky. The Galactic component produces a softer spectrum and a testable angular anisotropy. A second, radically different class of models, where the second component is instead isotropic, plausibly extragalactic and with a relatively soft spectrum, is disfavored instead by existing observations of muon neutrinos from the Northern sky and below few 100 TeV.

  8. Gravitational Anomalies in the Solar System?

    CERN Document Server

    Iorio, Lorenzo

    2014-01-01

    Mindful of the anomalous perihelion precession of Mercury discovered by U. Le Verrier in the second half of the nineteenth century and its successful explanation by A. Einstein with his General Theory of Relativity in the early years of the twentieth century, discrepancies among observed effects in our Solar system and their theoretical predictions on the basis of the currently accepted laws of gravitation applied to known bodies have the potential of paving the way for remarkable advances in fundamental physics. This is particularly important now more than ever, given that most of the Universe seems to be made of unknown substances dubbed Dark Matter and Dark Energy. Should this not be directly the case, Solar system's anomalies could anyhow lead to advancements in cumulative science, as shown to us by the discovery of Neptune in the first half of the nineteenth century. Moreover, investigations in one of such directions can serendipitously enrich the other one as well. The current status of some alleged gra...

  9. Visual analytics of anomaly detection in large data streams

    Science.gov (United States)

    Hao, Ming C.; Dayal, Umeshwar; Keim, Daniel A.; Sharma, Ratnesh K.; Mehta, Abhay

    2009-01-01

    Most data streams usually are multi-dimensional, high-speed, and contain massive volumes of continuous information. They are seen in daily applications, such as telephone calls, retail sales, data center performance, and oil production operations. Many analysts want insight into the behavior of this data. They want to catch the exceptions in flight to reveal the causes of the anomalies and to take immediate action. To guide the user in finding the anomalies in the large data stream quickly, we derive a new automated neighborhood threshold marking technique, called AnomalyMarker. This technique is built on cell-based data streams and user-defined thresholds. We extend the scope of the data points around the threshold to include the surrounding areas. The idea is to define a focus area (marked area) which enables users to (1) visually group the interesting data points related to the anomalies (i.e., problems that occur persistently or occasionally) for observing their behavior; (2) discover the factors related to the anomaly by visualizing the correlations between the problem attribute with the attributes of the nearby data items from the entire multi-dimensional data stream. Mining results are quickly presented in graphical representations (i.e., tooltip) for the user to zoom into the problem regions. Different algorithms are introduced which try to optimize the size and extent of the anomaly markers. We have successfully applied this technique to detect data stream anomalies in large real-world enterprise server performance and data center energy management.

  10. Discovering System Health Anomalies Using Data Mining Techniques

    Science.gov (United States)

    Sriastava, Ashok, N.

    2005-01-01

    We present a data mining framework for the analysis and discovery of anomalies in high-dimensional time series of sensor measurements that would be found in an Integrated System Health Monitoring system. We specifically treat the problem of discovering anomalous features in the time series that may be indicative of a system anomaly, or in the case of a manned system, an anomaly due to the human. Identification of these anomalies is crucial to building stable, reusable, and cost-efficient systems. The framework consists of an analysis platform and new algorithms that can scale to thousands of sensor streams to discovers temporal anomalies. We discuss the mathematical framework that underlies the system and also describe in detail how this framework is general enough to encompass both discrete and continuous sensor measurements. We also describe a new set of data mining algorithms based on kernel methods and hidden Markov models that allow for the rapid assimilation, analysis, and discovery of system anomalies. We then describe the performance of the system on a real-world problem in the aircraft domain where we analyze the cockpit data from aircraft as well as data from the aircraft propulsion, control, and guidance systems. These data are discrete and continuous sensor measurements and are dealt with seamlessly in order to discover anomalous flights. We conclude with recommendations that describe the tradeoffs in building an integrated scalable platform for robust anomaly detection in ISHM applications.

  11. Nesting of thermodynamic, structural, and dynamic anomalies in liquid silicon

    Science.gov (United States)

    Vasisht, Vishwas V.; Mathew, John; Sengupta, Shiladitya; Sastry, Srikanth

    2014-09-01

    Anomalous behaviour in density, diffusivity, and structural order is investigated for silicon modeled by the Stillinger-Weber potential by performing molecular dynamics simulations. As previously reported in the case of water [J. R. Errington and P. G. Debenedetti, Nature (London) 409, 318 (2001)] and silica [M. S. Shell, P. G. Debenedetti, and A. Z. Panagiotopoulos, Phys. Rev. E 66, 011202 (2002)], a cascading of thermodynamic, dynamic, and structural anomalous regions is also observed in liquid silicon. The region of structural anomaly includes the region of diffusivity anomaly, which in turn encompasses the region of density anomaly (which is unlike water but similar to silica). In the region of structural anomaly, a tight correlation between the translational and tetrahedrality order parameter is found, but the correlation is weaker when a local orientational order parameter (q3) is used as a measure of tetrahedrality. The total excess entropy and the pair correlation entropy are computed across the phase diagram and the correlation between the excess entropy and the regions of anomalies in the phase diagram of liquid silicon is examined. Scaling relations associating the excess entropy with the diffusion coefficient show considerable deviation from the quasi-universal behaviour observed in hard-sphere and Lennard-Jones liquids and some liquid metals. Excess entropy based criteria for diffusivity and structural anomalies fail to capture the observed regions of anomaly.

  12. THE PREVALENCE OF DENTAL ANOMALIES IN A TURKISH POPULATION

    Directory of Open Access Journals (Sweden)

    Gamze Aren

    2015-10-01

    Full Text Available Purpose: The aim of the present study was to investigate the prevalence of dental anomalies in a Turkish population according to the gender and age. Materials and Methods: A retrospective study was performed using panoramic radiographs of 2025 patients (885 males and 1140 females ranging in age from 9 to 35 (mean age 25.61±10.04 years attending Department of Oral Radiology, University of Istanbul, Faculty of Dentistry. These patients were examined to determine the presence of developmental dental anomalies involving hypodontia, hyperdontia, microdontia, taurodontism and other root anomalies. The incidence of these anomalies were assessed according to the gender and age. Results: Among the 2025 subjects, a total of 96 individuals (42 males and 54 females showed at least one of the selected dental anomalies (4.74%. Tooth agenesis was the most common dental abnormality (1.77% followed by taurodontism (1.18%, hyperdontia (0.79%, microdontia (0.54% and root anomalies (0.44%, respectively. Conclusion: Tooth agenesis is the most common developmental dental anomaly in the studied Turkish population followed by taurodontism.

  13. Delineation of structural lineaments from marine magnetic anomalies off Lawson's Bay (Visakhapatnam), East Coast of India

    Digital Repository Service at National Institute of Oceanography (India)

    Murthy, K.S.R.; Rao, T.C.S.; Rao, M.M.M.

    Marine magnetic surveys have recorded total field anomalies that correspond to structural lineaments extending from the coast into the sea. The significant anomalies recorded in this area are along wavelength high amplitude negative anomaly...

  14. Local inversion of magnetic anomalies: Implication for Mars' crustal evolution

    OpenAIRE

    Quesnel, Yoann; Langlais, Benoit; Sotin, Christophe

    2007-01-01

    International audience; Martian magnetic anomalies have been revealed by the Mars Global Surveyor (MGS) mission in the south hemisphere of Mars. The present study models anomalies located in the ancient Terra Sirenum area between latitudes 26°S and 40°S and longitudes 185°E and 210°E using forward and inverse approaches. While the high-altitude measurements reveal the presence of two main magnetic anomalies, three are detected by low-altitude data. They are modeled as uncorrelated dipolar sou...

  15. On three-dimensional trace anomaly from holographic local RG

    CERN Document Server

    Kikuchi, Ken; Suzuki, Akihiro

    2016-01-01

    Odd-dimensional quantum field theories (QFTs) can have nonzero trace anomalies if external fields are introduced and some ingredients needed to make Lorentz scalars with appropriate mass dimensions (or weights) are supplied. We have studied a three-dimensional QFT and explicitly computed the trace of the stress tensor using the holographic local renormalization group (RG). We have checked some properties of vector beta functions and the Wess-Zumino consistency condition, however, found the anomalies vanish on fixed points. We clarify what is responsible for the vanishing trace anomalies.

  16. Application of Bayesian Dynamic Forecast in Anomaly Detection

    Institute of Scientific and Technical Information of China (English)

    YAN Hui; CAO Yuanda

    2005-01-01

    A macroscopical anomaly detection method based on intrusion statistic and Bayesian dynamic forecast is presented. A large number of alert data that cannot be dealt with in time are always aggregated in control centers of large-scale intrusion detection systems. In order to improve the efficiency and veracity of intrusion analysis, the intrusion intensity values are picked from alert data and Bayesian dynamic forecast method is used to detect anomaly. The experiments show that the new method is effective on detecting macroscopical anomaly in large-scale intrusion detection systems.

  17. Anomalies of the entanglement entropy in chiral theories

    Science.gov (United States)

    Iqbal, Nabil; Wall, Aron C.

    2016-10-01

    We study entanglement entropy in theories with gravitational or mixed U(1) gauge-gravitational anomalies in two, four and six dimensions. In such theories there is an anomaly in the entanglement entropy: it depends on the choice of reference frame in which the theory is regulated. We discuss subtleties regarding regulators and entanglement entropies in anomalous theories. We then study the entanglement entropy of free chiral fermions and self-dual bosons and show that in sufficiently symmetric situations this entanglement anomaly comes from an imbalance in the flux of modes flowing through the boundary, controlled by familiar index theorems.

  18. Lenz microphthalmia syndrome with dental anomalies: a case report.

    Science.gov (United States)

    Ersin, Nazan Kocatas; Tugsel, Zuhal; Gökce, Bülent; Ozpinar, Birgül; Eronat, Nesrin

    2003-01-01

    This report describes the dental management and 7-year follow-up of a 14-year-old boy who showed the typical characteristics of Lenz microphthalmia syndrome, a rare genetic disorder characterized by multiple abnormalities. The main features of the syndrome are microphthalmia, developmental retardation, ear abnormalities, microcephaly, skeletal, digital and urogenital anomalies. The dental anomalies include micrognathia, hypodontia, agenesis of permanent teeth, conic-shaped incisors, and taurodontic molars. The purpose of the report was to document specific oral manifestations and dental anomalies and their management associated with a previously reported case.

  19. Minor physical anomalies and schizophrenia spectrum disorders: a prospective investigation

    DEFF Research Database (Denmark)

    Schiffman, Jason; Ekstrøm, Morten; LaBrie, Joseph

    2002-01-01

    OBJECTIVE: The authors prospectively assessed the relationship between minor physical anomalies identified in childhood and adult psychiatric outcome. METHOD: In 1972, minor physical anomalies were measured in a group of 265 Danish children ages 11-13. The examination was part of a larger study...... spectrum disorders more often than other psychopathology. Among individuals at genetic high risk, higher numbers of minor physical anomalies may interact with pre-existing vulnerabilities for schizophrenia to increase the likelihood of a schizophrenia spectrum disorder outcome. CONCLUSIONS: Minor physical...

  20. Occupational chemical exposures and congenital anomalies: state of the art

    Energy Technology Data Exchange (ETDEWEB)

    Cordier, S. (Centre de Lutte Contre le Cancer Gustave-Roussy, 94 - Villejuif (France)); Goujard, J. (Maternite Baudelocque, 75 - Paris (France))

    1994-01-01

    Several thousands of compounds with a potential reproductive toxicity have been identified in animals, some of them are teratogens. In humans, only a small number of chemicals, administered as drugs, present in the diet, or in the occupational environment are recognized human teratogens. In parallel, about 60% of congenital anomalies have no identified cause and most probably some compounds present in the environment may contribute to certain anomalies. This paper presents a review of published epidemiological studies on the association between occupational exposures and congenital anomalies, focusing more particularly on some groups of compounds or some occupations such as: anaesthetic gases, laboratory work, solvents, pesticides and lead. (authors).

  1. Diagnosis of Fetal Central Nervous System Anomalies by Ultrasonography

    Directory of Open Access Journals (Sweden)

    F. Tuncay Ozgunen

    2003-04-01

    Full Text Available During the last 30 years, one of the most important instruments in diagnosis is ultrasonograph. It has an indispensible place in obstetrics. Its it possible to evaluate normal fetal anatomy, to follow-up fetal growth and to diagnose fetal congenital anomalies by ultrasonography. Central nervous system anomalies is the one of the most commonly seen and the best time for screening is between 18- and 22-week of pregnancy. In this paper, it is presented the sonographic features of some outstanding Central Nervous System anomalies. [Archives Medical Review Journal 2003; 12(2.000: 77-89

  2. Lithospheric analysis of satellite geopotential anomalies of East Asia

    Science.gov (United States)

    Tan, Li

    Satellite gravity and magnetic anomalies are used to study the lithosphere of East Asia. Free-air gravity anomalies are decomposed into terrain-correlated, mantle/core and intracrustal components by spectral correlation analysis of the free-air gravity anomalies and terrain gravity effects. Compensated terrain gravity anomalies are obtained by removing the terrain-correlated free-air gravity anomalies. They are used to estimate the Moho undulation and crustal thickness by Gauss-Legendre quadrature (GLQ) inversion techniques assuming a Airy-Heiskanen model of crustal compensation. These results are used to develop enhanced reduction procedures to generate an improved Magsat magnetic anomaly map for East Asia. A degree 12 core field is removed from the data that are updated for the crustal components in the core field differences between degree 14 and 12. These components are estimated by using spectral correlation analysis to compare the Magsat anomalies to the magnetic effect of the crust that is available from the first vertical derivative of the terrain-correlated free-air gravity anomalies via Poisson's theorem. External field effects are separated using pass-by-pass correlation analysis of the dusk and dawn data sets and their spectral reconstruction. Coherent components in the dusk and dawn maps are combined to estimate the magnetic anomalies of the lithosphere. Long wavelength magnetic features related to lower crustal thickness variations are converted into effective magnetization contrasts by a new GLQ inversion technique. Effective magnetization contrasts of the lower crust range over ±4 A/m in accordance petrological studies. Finally, a new GLQ integration formula for triangular wedge sources is derived for modeling of satellite-altitude geopotential field anomalies from arbitrarily shaped sources. Detailed magnetization and density contrasts for central India, the Tibetan Plateau, and the Bengal Gulf region are modeled by this new formula. Positive

  3. Chern-Simons terms from thermal circles and anomalies

    CERN Document Server

    Jensen, Kristan; Yarom, Amos

    2013-01-01

    We compute the full contribution of flavor and (or) Lorentz anomalies to the thermodynamic partition function. Apart from the Wess-Zumino consistency condition the Euclidean generating function must satisfy an extra requirement which we refer to as `consistency with the Euclidean vacuum.' The latter requirement fixes all Chern-Simons terms that arise in a particular Kaluza-Klein reduction of the theory. The solution to both conditions may be encoded in a `thermal anomaly polynomial' which we compute. Our construction fixes all the thermodynamic response parameters of a hydrodynamic theory associated with anomalies.

  4. On three-dimensional trace anomaly from holographic local RG

    Science.gov (United States)

    Kikuchi, Ken; Hosoda, Hiroto; Suzuki, Akihiro

    2017-01-01

    Odd-dimensional quantum field theories (QFTs) can have nonzero trace anomalies if external fields are introduced and some ingredients needed to make Lorentz scalars with appropriate mass dimensions (or weights) are supplied. We have studied a three-dimensional QFT and explicitly computed the trace of the stress tensor using the holographic local renormalization group (RG). We have checked some properties of vector beta functions and the Wess-Zumino consistency condition; however, we have found that the anomalies vanish on fixed points. We clarify what is responsible for the vanishing trace anomalies.

  5. Sacral rib: an uncommon congenital anomaly.

    Science.gov (United States)

    Miyakoshi, Naohisa; Kobayashi, Akira; Hongo, Michio; Shimada, Yoichi

    2015-06-01

    Sacral rib represents an uncommon pathology in which rib-like structures arise from the sacrum. Supernumerary ribs may occur at any level of the spine, but supernumerary ribs in the sacrococcygeal area are extremely rare. To present the case of a patient with sacral rib and to discuss this entity with reference to the literature. A case report and literature review. A 17-year-old girl presented with low back pain and discomfort in bilateral gluteal regions. Radiographs and computed tomography (CT) of the pelvis showed a smooth-surfaced, rod-like bony structure attaching to the sacrum on the left side. The appearance was consistent with sacral rib. The sacrum was hypoplastic and deviated to the right. Magnetic resonance imaging (MRI) showed insertion of the gluteus maximus (GM) onto the coccyx only on the right side. The sacral rib existed beneath the left GM muscle and received a partial insertion from the left GM muscle. No ligamentous continuation between the sacral rib and coccyx was observed. Conservative treatment relieved symptoms, so no surgical intervention was performed. Sacral rib is a rare congenital anomaly for which surgical intervention is usually unnecessary. However, appropriate workups with CT and/or MRI should be considered for women, because sacral rib may cause complications during childbirth. In the literature, sacral/coccygeal rib is sometimes called "pelvic rib." However, sacral/coccygeal rib should be distinguished from pelvic rib, because pelvic rib originating from the ilium is considered to represent a different entity. Copyright © 2015 Elsevier Inc. All rights reserved.

  6. Dental anomalies in a Portuguese population.

    Science.gov (United States)

    Campoy, Maria Dolores; González-Allo, Ana; Moreira, Joaquim; Ustrell, Josep; Pinho, Teresa

    2013-06-01

    The aim of this study was to evaluate the prevalence and pattern of agenesis, supernumerary teeth, impacted teeth and transpositions, as well as the relation between them, in a Portuguese sample. The study sample consisted of 2888 patients, observed between 2005 and 2009 at the Dentistry Clinic of the Instituto Superior de Ciências da Saúde-Norte (ISCSN, Portugal). The study included evaluation of the following parameters: agenesis of all teeth, supernumerary teeth, impacted permanent teeth and tooth transposition. The age range varied from 7 to 21 years. In order to study the absence of the third molar, subjects aged below 14 years were excluded. Statistical analysis was performed using SPSS(®). Excluding third molars, the prevalence of tooth agenesis, supernumerary teeth, impacted teeth and transpositions was 6.1%, 0.8%, 1.8% and 0.2%, respectively, for this Portuguese population. There was a significantly higher prevalence of supernumerary teeth in males than in females (P mesiodens was the most frequent supernumerary tooth, the upper canine was the most frequent impacted tooth, and the upper canine and upper lateral were the two most frequently transposed teeth. There was a significantly higher prevalence of missing third molars in the impacted canine group than in the non-impacted canine group (P < 0.05). Agenesis is the most frequent dental anomaly. There are no differences between genders, except for supernumerary teeth, which are found more frequently in men. A relation between third molar agenesis and impacted canines was found. Copyright © 2013 Elsevier Masson SAS. All rights reserved.

  7. Vibrational anomalies and marginal stability of glasses

    KAUST Repository

    Marruzzo, Alessia

    2013-01-01

    The experimentally measured vibrational spectrum of glasses strongly deviates from that expected in Debye\\'s elasticity theory: The density of states deviates from Debye\\'s ω2 law ("boson peak"), the sound velocity shows a negative dispersion in the boson-peak frequency regime, and there is a strong increase in the sound attenuation near the boson-peak frequency. A generalized elasticity theory is presented, based on the model assumption that the shear modulus of the disordered medium fluctuates randomly in space. The fluctuations are assumed to be uncorrelated and have a certain distribution (Gaussian or otherwise). Using field-theoretical techniques one is able to derive mean-field theories for the vibrational spectrum of a disordered system. The theory based on a Gaussian distribution uses a self-consistent Born approximation (SCBA),while the theory for non-Gaussian distributions is based on a coherent-potential approximation (CPA). Both approximate theories appear to be saddle-point approximations of effective replica field theories. The theory gives a satisfactory explanation of the vibrational anomalies in glasses. Excellent agreement of the SCBA theory with simulation data on a soft-sphere glass is reached. Since the SCBA is based on a Gaussian distribution of local shear moduli, including negative values, this theory describes a shear instability as a function of the variance of shear fluctuations. In the vicinity of this instability, a fractal frequency dependence of the density of states and the sound attenuation ∝ ω1+a is predicted with a ≲ 1/2. Such a frequency dependence is indeed observed both in simulations and in experimental data. We argue that the observed frequency dependence stems from marginally stable regions in a glass and discuss these findings in terms of rigidity percolation. © 2013 EDP Sciences and Springer.

  8. Indoor waypoint navigation via magnetic anomalies.

    Science.gov (United States)

    Riehle, Timothy H; Anderson, Shane M; Lichter, Patrick A; Condon, John P; Sheikh, Suneel I; Hedin, Daniel S

    2011-01-01

    A wide assortment of technologies have been proposed to construct indoor navigation services for the blind and vision impaired. Proximity-based systems and multilateration systems have been successfully demonstrated and employed. Despite the technical success of these technologies, broad adoption has been limited due to their significant infrastructure and maintenance costs. An alternative approach utilizing the indoor magnetic signatures inherent to steel-frame buildings solves the infrastructure cost problem; in effect the existing building is the location system infrastructure. Although magnetic indoor navigation does not require the installation of dedicated hardware, the dedication of resources to produce precise survey maps of magnetic anomalies represents a further barrier to adoption. In the present work an alternative leader-follower form of waypoint-navigation system has been developed that works without surveyed magnetic maps of a site. Instead the wayfarer's magnetometer readings are compared to a pre-recorded magnetic "leader" trace containing magnetic data collected along a route and annotated with waypoint information. The goal of the navigation system is to correlate the follower's magnetometer data with the leader's to trigger audio cues at precise points along the route, thus providing location-based guidance to the user. The system should also provide early indications of off-route conditions. As part of the research effort a smartphone based application was created to record and annotate leader traces with audio and numeric data at waypoints of interest, and algorithms were developed to determine (1) when the follower reaches a waypoint and (2) when the follower goes off-route. A navigation system utilizing this technology would enable a low-cost indoor navigation system capable of replaying audio annotations at precise locations along pre-recorded routes.

  9. Anomaly indicators for time-reversal symmetric topological orders

    CERN Document Server

    Wang, Chenjie

    2016-01-01

    Some time-reversal symmetric topological orders are anomalous in that they cannot be realized in strictly two-dimensions without breaking time reversal symmetry; instead, they can only be realized on the surface of certain three-dimensional systems. We propose two quantities, which we call {\\it anomaly indicators}, that can detect if a time-reversal symmetric topological order is anomalous in this sense. Both anomaly indicators are expressed in terms of the quantum dimensions, topological spins, and time-reversal properties of the anyons in the given topological order. The first indicator, $\\eta_2$, applies to bosonic systems while the second indicator, $\\eta_f$, applies to fermionic systems in the DIII class. We conjecture that $\\eta_2$, together with a previously known indicator $\\eta_1$, can detect the two known $\\mathbb Z_2$ anomalies in the bosonic case, while $\\eta_f$ can detect the $\\mathbb Z_{16}$ anomaly in the fermionic case.

  10. Anomalies of the Entanglement Entropy in Chiral Theories

    CERN Document Server

    Iqbal, Nabil

    2015-01-01

    We study entanglement entropy in theories with gravitational or mixed U(1) gauge-gravitational anomalies in two, four and six dimensions. In such theories there is an anomaly in the entanglement entropy: it depends on the choice of reference frame in which the theory is regulated. We discuss subtleties regarding regulators and entanglement entropies in anomalous theories. We then study the entanglement entropy of free chiral fermions and self-dual bosons and show that in sufficiently symmetric situations this entanglement anomaly comes from an imbalance in the flux of modes flowing through the boundary, controlled by familiar index theorems. In two and four dimensions we use anomalous Ward identities to find general expressions for the transformation of the entanglement entropy under a diffeomorphism. (In the case of a mixed anomaly there is an alternative presentation of the theory in which the entanglement entropy is not invariant under a U(1) gauge transformation. The free-field manifestation of this pheno...

  11. Aberrant Right Subclavian Artery: A Life‑threatening Anomaly that ...

    African Journals Online (AJOL)

    Aberrant Right Subclavian Artery: A Life‑threatening Anomaly that should be ... of the retroesophageal space during esophagectomy, may prevent any injury to the .... Source of Support: Nil, Conflict of Interest: None declared. [Downloaded free ...

  12. Hawaiian Islands Terrain Corrected Free Air Anomalies (96)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This 2' gravity anomaly grid for the Principal Hawaiian Islands is NOT the input data set used in development of the GEOID96 model. This gravity grid models the...

  13. PR/VI Terrain Corrected Free Air Anomalies (96)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This 2' gravity anomaly grid for the Puerto Rico and the Virgin Islands is NOT the input data set used in development of the GEOID96 model. This gravity grid models...

  14. Solving a prisoner's dilemma in distributed anomaly detection

    Data.gov (United States)

    National Aeronautics and Space Administration — Anomaly detection has recently become an important problem in many industrial and financial applications. In several instances, the data to be analyzed for possible...

  15. Anomaly Detection and Diagnosis Algorithms for Discrete Symbols

    Data.gov (United States)

    National Aeronautics and Space Administration — We present a set of novel algorithms which we call sequenceMiner that detect and characterize anomalies in large sets of high-dimensional symbol sequences that arise...

  16. Condition Parameter Modeling for Anomaly Detection in Wind Turbines

    Directory of Open Access Journals (Sweden)

    Yonglong Yan

    2014-05-01

    Full Text Available Data collected from the supervisory control and data acquisition (SCADA system, used widely in wind farms to obtain operational and condition information about wind turbines (WTs, is of important significance for anomaly detection in wind turbines. The paper presents a novel model for wind turbine anomaly detection mainly based on SCADA data and a back-propagation neural network (BPNN for automatic selection of the condition parameters. The SCADA data sets are determined through analysis of the cumulative probability distribution of wind speed and the relationship between output power and wind speed. The automatic BPNN-based parameter selection is for reduction of redundant parameters for anomaly detection in wind turbines. Through investigation of cases of WT faults, the validity of the automatic parameter selection-based model for WT anomaly detection is verified.

  17. Bouguer gravity anomaly data grid for the conterminous US

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The grid of gravity anomaly data for the conterminous United States and adjacent marine areas was constructed from National Information Mapping Agency (NIMA) gravity...

  18. A Framework for Security Components Anomalies Severity Evaluation and Classification

    Directory of Open Access Journals (Sweden)

    Kamel Karoui

    2013-07-01

    Full Text Available Security components such as firewalls, IDS and IPS, are the most widely adopted security devices fornetwork protection.These components are often implemented with several errors (or anomalies that aresometimes critical. To ensure the security of their networks, administrators should detect these anomaliesand correct them. Before correcting the detected anomalies, the administrator should evaluate and classifythese latter to determine the best strategy to correct them. In this work, we propose a framework to assessand classify the detected anomalies using a three evaluation criteria: a quantitative evaluation, a semanticevaluation and multi-anomalies evaluation. The proposed process, convenient in an audit process, will bedetailed by a case study to demonstrate its usefulness

  19. New Anomaly of the Axial-Vector Current

    Institute of Scientific and Technical Information of China (English)

    HE Han-Xin

    2001-01-01

    By computing the axial-vector current operator equation, we find the anomalous axial-vector curl equation besides the well-known anomalous axial-vector divergence equation (the Adler-Bell-Jackiw anomaly) and discuss its implication.``

  20. Anti-persistence in the global temperature anomaly field

    Directory of Open Access Journals (Sweden)

    L. M. V. Carvalho

    2007-11-01

    Full Text Available In this study, low-frequency variations in temperature anomaly are investigated by mapping temperature anomaly records onto random walks. We show evidence that global overturns in trends of temperature anomalies occur on decadal time-scales as part of the natural variability of the climate system. Paleoclimatic summer records in Europe and New-Zealand provide further support for these findings as they indicate that anti-persistence of temperature anomalies on decadal time-scale have occurred in the last 226 yrs. Atmospheric processes in the subtropics and mid-latitudes of the SH and interactions with the Southern Oceans seem to play an important role to moderate global variations of temperature on decadal time-scales.

  1. Seafloor spreading magnetic anomalies in the Enderby Basin, East Antarctic

    Digital Repository Service at National Institute of Oceanography (India)

    Ramana, M.V.; Ramprasad, T.; Desa, M.

    of eastern Gondwanaland. Inadequate age information either in the form of magnetic anomaly isochrons or dating of oceanic rocks from the conjugate margins of Antarctica and India perhaps led several authors to propose incomplete plate reconstruction models...

  2. Marine magnetic anomalies in the northeastern Arabian Sea

    Digital Repository Service at National Institute of Oceanography (India)

    Bhattacharya, G.C.; Chaubey, A; Murty, G.P.S.; Rao, D.G.; Scherbakov, V.S.; Lygin, V.A; Philipenko, A; Bogomyagkov, A

    Based on the analysis of some additional magnetic profiles, an updated correlation and identification of the sea-floor spreading type magnetic lineations in the northeastern Arabian Sea is presented. The anomaly 24 A-B sequence, characteris...

  3. Bouguer gravity anomaly data grid for the conterminous US

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The grid of gravity anomaly data for the conterminous United States and adjacent marine areas was constructed from National Information Mapping Agency (NIMA)...

  4. Aeromagnetic Anomaly Map of Bangladesh (mag8bg)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This coverage includes arcs and arc labels that hold the Aeromagnetic anomaly value for contours and type contours of the original map of Bangladesh with the same...

  5. Network Traffic Anomalies Detection and Identification with Flow Monitoring

    CERN Document Server

    Nguyen, Huy; Kim, Dong Il; Choi, Deokjai

    2010-01-01

    Network management and security is currently one of the most vibrant research areas, among which, research on detecting and identifying anomalies has attracted a lot of interest. Researchers are still struggling to find an effective and lightweight method for anomaly detection purpose. In this paper, we propose a simple, robust method that detects network anomalous traffic data based on flow monitoring. Our method works based on monitoring the four predefined metrics that capture the flow statistics of the network. In order to prove the power of the new method, we did build an application that detects network anomalies using our method. And the result of the experiments proves that by using the four simple metrics from the flow data, we do not only effectively detect but can also identify the network traffic anomalies.

  6. The effect of scale on the interpretation of geochemical anomalies

    Science.gov (United States)

    Theobald, P.K.; Eppinger, R.G.; Turner, R.L.; Shiquan, S.

    1991-01-01

    The purpose of geochemical surveys changes with scale. Regional surveys identify areas where mineral deposits are most likely to occur, whereas intermediate surveys identify and prioritize specific targets. At detailed scales specific deposit models may be applied and deposits delineated. The interpretation of regional geochemical surveys must take into account scale-dependent difference in the nature and objectives of this type of survey. Overinterpretation of regional data should be resisted, as should recommendations to restrict intermediate or detailed follow-up surveys to the search for specific deposit types or to a too limited suite of elements. Regional surveys identify metallogenic provinces within which a variety of deposit types and metals are most likely to be found. At intermediate scale, these regional provinces often dissipate into discrete clusters of anomalous areas. At detailed scale, individual anomalous areas reflect local conditions of mineralization and may seem unrelated to each other. Four examples from arid environments illustrate the dramatic change in patterns of anomalies between regional and more detailed surveys. On the Arabian Shield, a broad regional anomaly reflects the distribution of highly differentiated anorogenic granites. A particularly prominent part of the regional anomaly includes, in addition to the usual elements related to the granites, the assemblage of Mo, W and Sn. Initial interpretation suggested potential for granite-related, stockwork Mo deposits. Detailed work identified three separate sources for the anomaly: a metal-rich granite, a silicified and stockwork-veined area with scheelite and molybdenite, and scheelite/powellite concentrations in skarn deposits adjacent to a ring-dike complex. Regional geochemical, geophysical and remote-sensing data in the Sonoran Desert, Mexico, define a series of linear features interpreted to reflect fundamental, northeast-trending fractures in the crust that served as the prime

  7. Detailed gravity anomalies from GEOS-3 satellite altimetry data

    Science.gov (United States)

    Gopalapillai, G. S.; Mourad, A. G.

    1978-01-01

    A technique for deriving mean gravity anomalies from dense altimetry data was developed. A combination of both deterministic and statistical techniques was used. The basic mathematical model was based on the Stokes' equation which describes the analytical relationship between mean gravity anomalies and geoid undulations at a point; this undulation is a linear function of the altimetry data at that point. The overdetermined problem resulting from the excessive altimetry data available was solved using Least-Squares principles. These principles enable the simultaneous estimation of the associated standard deviations reflecting the internal consistency based on the accuracy estimates provided for the altimetry data as well as for the terrestrial anomaly data. Several test computations were made of the anomalies and their accuracy estimates using GOES-3 data.

  8. Gravity and geothermal anomalies in Borno Basin, Nigeria ...

    African Journals Online (AJOL)

    PROMOTING ACCESS TO AFRICAN RESEARCH ... This paper briefly attempts the interpretation of the gravity anomalies to ... gravity data to geodynamics in the exploration for geothermal energy as an additional source of energy for Nigeria.

  9. Anomaly Detection from ASRS Databases of Textual Reports

    Data.gov (United States)

    National Aeronautics and Space Administration — Our primary goal is to automatically analyze textual reports from the Aviation Safety Reporting System (ASRS) database to detect/discover the anomaly categories...

  10. An entropy-based unsupervised anomaly detection pattern learning algorithm

    Institute of Scientific and Technical Information of China (English)

    YANG Ying-jie; MA Fan-yuan

    2005-01-01

    Currently, most anomaly detection pattern learning algorithms require a set of purely normal data from which they train their model. If the data contain some intrusions buried within the training data, the algorithm may not detect these attacks because it will assume that they are normal. In reality, it is very hard to guarantee that there are no attack items in the collected training data. Focusing on this problem, in this paper,firstly a new anomaly detection measurement is proposed according to the probability characteristics of intrusion instances and normal instances. Secondly, on the basis of anomaly detection measure, we present a clusteringbased unsupervised anomaly detection patterns learning algorithm, which can overcome the shortage above. Finally, some experiments are conducted to verify the proposed algorithm is valid.

  11. Anomalies of subjective experience in schizophrenia and psychotic bipolar illness

    DEFF Research Database (Denmark)

    Parnas, J; Handest, P; Saebye, D

    2003-01-01

    Symptoms (BSABS). Anomalies of experience were condensed into rational scales with good internal consistencies. RESULTS: Diagnosis of schizophrenia was associated with elevated scores on the scales measuring perplexity (loss of immediate meaning), disorders of perception, disorders of self....... The purpose of this study is to explore frequency of qualitative, not-yet-psychotic, anomalies of subjective experience in patients with residual schizophrenia and psychotic bipolar illness in remission. METHOD: The patients were examined with the Danish version of the Bonn Scale for the Assessment of Basic......-awareness, and marginally so, disorders of cognition. CONCLUSION: These findings, in conjunction with those from other, methodologically similar studies, suggest that certain anomalies of subjective experience aggregate significantly in schizophrenia. These experiential anomalies appear to be relevant for early...

  12. In-Flight Diagnosis and Anomaly Detection Project

    Data.gov (United States)

    National Aeronautics and Space Administration — In flight diagnosis and anomaly detection is a difficult challenge that requires sufficient observation and real-time processing of health information. Our approach...

  13. Large Scale Anomalies of the Cosmic Microwave Background with Planck

    DEFF Research Database (Denmark)

    Frejsel, Anne Mette

    This thesis focuses on the large scale anomalies of the Cosmic Microwave Background (CMB) and their possible origins. The investigations consist of two main parts. The first part is on statistical tests of the CMB, and the consistency of both maps and power spectrum. We find that the Planck data...... is very consistent, while the WMAP 9 year release appears more contaminated by non-CMB residuals than the 7 year release. The second part is concerned with the anomalies of the CMB from two approaches. One is based on an extended inflationary model as the origin of one specific large scale anomaly, namely....... Here we find evidence that the Planck CMB maps contain residual radiation in the loop areas, which can be linked to some of the large scale CMB anomalies: the point-parity asymmetry, the alignment of quadrupole and octupole and the dipolemodulation....

  14. Magnetic Anomalies over the Pacific-Antarctic Ridge.

    Science.gov (United States)

    Pitman, W C; Heirtzler, J R

    1966-12-01

    Four magnetic profiles across the Pacific-Antarctic Ridge reveal magnetic anomalies that show trends parallel with the ridge axis and symmetry about the ridge axis. The distribution of bodies that could cause these anomalies supports the Vine and Matthews hypothesis for the generation of patterns of magnetic anomalies associated with the midocean ridge system. The geometry of the bodies accords with the known reversals of the geomagnetic field during the last 3.4 million years, indicating a spreading rate of the ocean floor of 4.5 centimeters per year. If one assume that the spreading rate within 500 kilometers of the ridge axis has been constant, reversals of the geomagnetic field during the last 10.0 million years can be determined. This new, detailed history of field reversals accords with observed anomalies over Reykjanes Ridge in the North Atlantic if a spreading rate of 1 centimeter per year is assumed there.

  15. Comparative Analysis of Data-Driven Anomaly Detection Methods

    Data.gov (United States)

    National Aeronautics and Space Administration — This paper provides a review of three different advanced machine learning algorithms for anomaly detection in continuous data streams from a ground-test firing of a...

  16. Load characterization and anomaly detection for voice over IP traffic.

    Science.gov (United States)

    Mandjes, Michel; Saniee, Iraj; Stolyar, Alexander L

    2005-09-01

    We consider the problem of traffic anomaly detection in IP networks. Traffic anomalies typically arise when there is focused overload or when a network element fails and it is desired to infer these purely from the measured traffic. We derive new general formulae for the variance of the cumulative traffic over a fixed time interval and show how the derived analytical expression simplifies for the case of voice over IP traffic, the focus of this paper. To detect load anomalies, we show it is sufficient to consider cumulative traffic over relatively long intervals such as 5 min. We also propose simple anomaly detection tests including detection of over/underload. This approach substantially extends the current practice in IP network management where only the first-order statistics and fixed thresholds are used to identify abnormal behavior. We conclude with the application of the scheme to field data from an operational network.

  17. Anomaly Detection with Score functions based on Nearest Neighbor Graphs

    CERN Document Server

    Zhao, Manqi

    2009-01-01

    We propose a novel non-parametric adaptive anomaly detection algorithm for high dimensional data based on score functions derived from nearest neighbor graphs on $n$-point nominal data. Anomalies are declared whenever the score of a test sample falls below $\\alpha$, which is supposed to be the desired false alarm level. The resulting anomaly detector is shown to be asymptotically optimal in that it is uniformly most powerful for the specified false alarm level, $\\alpha$, for the case when the anomaly density is a mixture of the nominal and a known density. Our algorithm is computationally efficient, being linear in dimension and quadratic in data size. It does not require choosing complicated tuning parameters or function approximation classes and it can adapt to local structure such as local change in dimensionality. We demonstrate the algorithm on both artificial and real data sets in high dimensional feature spaces.

  18. On the Utility of Anonymized Flow Traces for Anomaly Detection

    CERN Document Server

    Burkhart, Martin; May, Martin

    2008-01-01

    The sharing of network traces is an important prerequisite for the development and evaluation of efficient anomaly detection mechanisms. Unfortunately, privacy concerns and data protection laws prevent network operators from sharing these data. Anonymization is a promising solution in this context; however, it is unclear if the sanitization of data preserves the traffic characteristics or introduces artifacts that may falsify traffic analysis results. In this paper, we examine the utility of anonymized flow traces for anomaly detection. We quantitatively evaluate the impact of IP address anonymization, namely variations of permutation and truncation, on the detectability of large-scale anomalies. Specifically, we analyze three weeks of un-sampled and non-anonymized network traces from a medium-sized backbone network. We find that all anonymization techniques, except prefix-preserving permutation, degrade the utility of data for anomaly detection. We show that the degree of degradation depends to a large exten...

  19. Anomaly Detection in Microblogging via Co-Clustering

    Institute of Scientific and Technical Information of China (English)

    杨武; 申国伟; 王魏; 宫良一; 于焱; 董国忠

    2015-01-01

    Traditional anomaly detection on microblogging mostly focuses on individual anomalous users or messages. Since anomalous users employ advanced intelligent means, the anomaly detection is greatly poor in performance. In this paper, we propose an innovative framework of anomaly detection based on bipartite graph and co-clustering. A bipartite graph between users and messages is built to model the homogeneous and heterogeneous interactions. The proposed co-clustering algorithm based on nonnegative matrix tri-factorization can detect anomalous users and messages simultaneously. The homogeneous relations modeled by the bipartite graph are used as constraints to improve the accuracy of the co-clustering algorithm. Experimental results show that the proposed scheme can detect individual and group anomalies with high accuracy on a Sina Weibo dataset.

  20. Vascular gastric anomalies as a cause of relapsing bleeding

    Directory of Open Access Journals (Sweden)

    Golubović Gradimir

    2008-01-01

    Full Text Available Background. Although relatively rare, gastric vascular anomalies can be recognized as a source of both chronic and acute blood loss, most often presenting as long term iron deficiency anemia, rarely as severe acute gastrointestinal bleeding. Case report. We present five patients with various gastric vascular anomalies, diagnosed during the year of 2003. in the Clinical Hospital Center Zemun. The diagnosis was based on endoscopic appearances, clinical history and characteristic histological findings. Gastric vascular anomalies presented in our review were: portal hypertensive gastropathy, gastric antral vascular ectasia, angiodysplasia, hereditary hemorrhagic telangiectasia and Dieulafoy lesion. The used treatment modalities included surgery and various endoscopic techniques (schlerotherapy, argon plasma coagulation. Conclusion. Patients presented with chronic iron deficiency anemia or acute and recurrent gastrointestinal hemorrhage should be considered as having one of gastric vascular anomalies.

  1. PHACE syndrome in antenatally diagnosed posterior fossa anomaly

    Directory of Open Access Journals (Sweden)

    Seema Pavaman Sindgikar

    2014-01-01

    Full Text Available PHACE is a neurocutaneous syndrome, an acronym to describe patients with facial segmental hemangiomas and other malformations. We describe a newborn antenatally diagnosed to have posterior fossa anomaly and subsequently as PHACE syndrome.

  2. Insulin analogues in pregnancy and specific congenital anomalies

    DEFF Research Database (Denmark)

    de Jong, Josta; Garne, Ester; Wender-Ozegowska, Ewa

    2016-01-01

    in the congenital anomaly rate among foetuses exposed to insulin analogues (lispro, aspart, glargine or detemir) compared with those exposed to human insulin or Neutral Protamine Hagedorn insulin. The total prevalence of congenital anomalies was not increased for foetuses exposed to insulin analogues. The small...... included 1286 foetuses of mothers using short-acting insulin analogues with 1089 references of mothers using human insulin and 768 foetuses of mothers using long-acting insulin analogues with 685 references of mothers using long-acting human insulin (Neutral Protamine Hagedorn). The congenital anomaly rate...... samples in the included studies provided insufficient statistical power to identify a moderate increased risk of specific congenital anomalies. Copyright © 2015 John Wiley & Sons, Ltd....

  3. Market Rationality: Efficient Market Hypothesis versus Market Anomalies

    Directory of Open Access Journals (Sweden)

    Kadir Can Yalcin

    2010-10-01

    Full Text Available Market efficiency theory suggests that market is rational and provides correct pricing. That is, the current prices of securities are close to their fundamental values because of either the rational investors or the arbitragers’ buy and sell action of underpriced or overpriced stocks. On the other hand, observed market anomalies have a challenge for this argument. They claim that irrational investment activities and the arbitrage opportunities’ being limited in markets cause some market anomalies that are inconsistent with efficient market hypothesis. The most commonly seen anomalies are the “volume”, “volatility”, “cash dividends”, “equity premium puzzle”, and the “predictability”. This work is a literature survey, and its main objective is to deal with efficient market theory and market anomalies in order to examine the question “Are markets rational or not"?

  4. Market Rationality: Efficient Market Hypothesis versus Market Anomalies

    Directory of Open Access Journals (Sweden)

    Kadir Can Yalcin

    2016-02-01

    Full Text Available Market efficiency theory suggests that market is rational and provides correct pricing. That is, the current prices of securities are close to their fundamental values because of either the rational investors or the arbitragers' buy and sell action of underpriced or overpriced stocks. On the other hand, observed market anomalies have a challenge for this argument. They claim that irrational investment activities and the arbitrage opportunities' being limited in markets cause some market anomalies that are inconsistent with efficient market hypothesis. The most commonly seen anomalies are the "volume", "volatility", "cash dividends", "equity premium puzzle", and the "predictability". This work is a literature survey, and its main objective is to deal with efficient market theory and market anomalies in order to examine the question "Are markets rational or not"?

  5. Anomaly and Condensate in the Light-Cone Schwinger Model

    OpenAIRE

    1996-01-01

    The axial anomaly and fermion condensate in the light cone Schwinger model are studied following path integral methods. This formalism allows for a simple and direct calculation for these and other vacuum dependent phenomena.

  6. Chromosomal anomalies in infertile azoospermic and oligospermic men

    Directory of Open Access Journals (Sweden)

    Kalantari P

    2001-08-01

    Full Text Available In this study, chromosome analyses were performed on 70 infertile Azoospermic and Oligospermic (<20 million/ml men, and also cultures of peripheral blood lymphocytes by high resolution banding method were analysed as well. It is revealed 8 (11.43 percent men with chromosomal abnormality. There were 31.4 percent patients with azoospermia and 68.6 percent with oligospermia from several thousands to 20×10^6 million/ml and their duration of infertility was at least 2 years. All patients with numerical chromosome anomalies had azoospermia and the most frequent anomaly was 47, XXY chromosomal constitution (klinfelter's syndrome, found in 8.57 percent of patients. We found that chromosomal anomalies found in this study were sex chromosome anomalies and an increased rate of numerical chromosomal abnormalities was among men with azoospermia. As a conclusion, we suggest that all men with azoospermia be considered for cytogenetical evaluation. 

  7. Large Scale Anomalies of the Cosmic Microwave Background with Planck

    DEFF Research Database (Denmark)

    Frejsel, Anne Mette

    This thesis focuses on the large scale anomalies of the Cosmic Microwave Background (CMB) and their possible origins. The investigations consist of two main parts. The first part is on statistical tests of the CMB, and the consistency of both maps and power spectrum. We find that the Planck data...... is very consistent, while the WMAP 9 year release appears more contaminated by non-CMB residuals than the 7 year release. The second part is concerned with the anomalies of the CMB from two approaches. One is based on an extended inflationary model as the origin of one specific large scale anomaly, namely....... Here we find evidence that the Planck CMB maps contain residual radiation in the loop areas, which can be linked to some of the large scale CMB anomalies: the point-parity asymmetry, the alignment of quadrupole and octupole and the dipolemodulation....

  8. Magnetic anomalies over the Andaman Islands and their geological significance

    Indian Academy of Sciences (India)

    P B V Subba Rao; M Radhakrishna; K Haripriya; B Someswara Rao; D Chandrasekharam

    2016-03-01

    The Andaman Islands form part of the outer-arc accretionary sedimentary complex belonging to the Andaman–Sumatra active subduction zone. The islands are characterized by thick cover of Neogene sediments along with exposed ophiolite rocks at few places. A regional magnetic survey was carriedout for the first time over the Andaman Islands with a view to understand the correlation of anomaly signatures with surface geology of the islands. The residual total field magnetic anomaly maps have revealed distinct magnetic anomalies having intermediate to high amplitude magnetic signatures andcorrelate with the areas over/close to the exposed ophiolite rocks along the east coast of north, middle and the south Andaman Islands. The 2D modelling of magnetic anomalies along selected E–W profiles across the islands indicate that the ophiolite bodies extend to a depth of about 5–8 km and spatiallycorrelate with the mapped fault/thrust zones.

  9. Bouguer Gravity Anomaly Map of Bangladesh (grav8bg)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This coverage includes arcs and arc labels that hold the Bouguer Gravity anomaly value for contours and type contours of the original map of Bangladesh with the same...

  10. Conformal anomaly of generalized form factors and finite loop integrals

    CERN Document Server

    Chicherin, Dmitry

    2017-01-01

    We reveal a new mechanism of conformal symmetry breaking at Born level. It occurs in generalized form factors with several local operators and an on-shell state of massless particles. The effect is due to hidden singularities on collinear configurations of the momenta. This conformal anomaly is different from the holomorphic anomaly of amplitudes. We present a number of examples in four and six dimensions. We find an application of the new conformal anomaly to finite loop momentum integrals with one or more massless legs. The collinear region around a massless leg creates a contact anomaly, made visible by the loop integration. The anomalous conformal Ward identity for an $\\ell-$loop integral is a 2nd-order differential equation whose right-hand side is an $(\\ell-1)-$loop integral. We show several examples, in particular the four-dimensional scalar double box.

  11. Nucleon swelling and the Nolen-Schiffer anomaly

    Energy Technology Data Exchange (ETDEWEB)

    Epele, L.N.; Garcia Canal, C.A.; Fanchiotti, H.; Mendez Galain, R.

    1987-04-23

    A previously proposed explanation of the Nolen-Schiffer anomaly based on the nucleon swelling inside a nuclei is reanalyzed. We found a clear incompatibility beetween this proposal and the experimental results.

  12. ANOMALY DETECTION IN NETWORKING USING HYBRID ARTIFICIAL IMMUNE ALGORITHM

    Directory of Open Access Journals (Sweden)

    D. Amutha Guka

    2012-01-01

    Full Text Available Especially in today’s network scenario, when computers are interconnected through internet, security of an information system is very important issue. Because no system can be absolutely secure, the timely and accurate detection of anomalies is necessary. The main aim of this research paper is to improve the anomaly detection by using Hybrid Artificial Immune Algorithm (HAIA which is based on Artificial Immune Systems (AIS and Genetic Algorithm (GA. In this research work, HAIA approach is used to develop Network Anomaly Detection System (NADS. The detector set is generated by using GA and the anomalies are identified using Negative Selection Algorithm (NSA which is based on AIS. The HAIA algorithm is tested with KDD Cup 99 benchmark dataset. The detection rate is used to measure the effectiveness of the NADS. The results and consistency of the HAIA are compared with earlier approaches and the results are presented. The proposed algorithm gives best results when compared to the earlier approaches.

  13. Wolbachia-induced reproductive anomalies and their future applications

    NARCIS (Netherlands)

    Jeong, G.S.; Suh, E.

    2008-01-01

    The Wolbachia bacterium is currently one of most prevalent endosymbionts of arthropods. The bacterium has drawn much attention because of its ability to induce reproductive anomalies, such as cytoplasmic incompatibility, feminization, male killing, and parthenogenesis, in various invertebrates. This

  14. Fluid/Gravity Correspondence, Second Order Transport and Gravitational Anomaly

    CERN Document Server

    Megias, Eugenio

    2013-01-01

    We study the transport properties of a relativistic fluid affected by chiral and gauge-gravitational anomalies. The computation is performed in the framework of the fluid/gravity correspondence for a 5 dim holographic model with Chern-Simons terms in the action. We find new anomalous and non anomalous transport coefficients, as well as new contributions to the existing ones coming from the mixed gauge-gravitational anomaly. Consequences for the shear waves dispersion relation are analyzed.

  15. Testing the Flyby Anomaly with the GNSS Constellation

    CERN Document Server

    Bertolami, O; Gil, P J S; Páramos, J

    2012-01-01

    We propose the concept of a space mission to probe the so called flyby anomaly, an unexpected velocity change experienced by some deep-space probes using earth gravity assists. The key feature of this proposal is the use of GNSS systems to obtain an increased accuracy in the tracking of the approaching spacecraft, mainly near the perigee. Two low-cost options are also discussed to further test this anomaly: an add-on to an existing spacecraft and a dedicated mission.

  16. Solitary mesenteric vascular anomaly presenting as acute abdomen

    Directory of Open Access Journals (Sweden)

    Thambidorai C

    2008-01-01

    Full Text Available A 4-year-old girl with a solitary vascular anomaly of the mesentery presented with acute lower abdominal pain. Despite the use of ultrasound, computed tomography scan and image-guided core biopsies, the lesion was initially mistaken for an inflammatory intra-abdominal mass. The correct diagnosis was made at laparotomy. Solitary vascular anomaly of the mesentery is rare and its presentation as an acute abdomen has not been reported before.

  17. A study of associated congenital anomalies with biliary atresia

    Directory of Open Access Journals (Sweden)

    Lucky Gupta

    2016-01-01

    Full Text Available Background/Purpose: This study aims to analyze the incidence and type of various associated anomalies among infants with extrahepatic biliary atresia (EHBA, compare their frequency with those quoted in the existing literature and assess their role in the overall management. Materials and Methods: A retrospective study was performed on 137 infants who underwent the Kasai procedure for EHBA during the past 12 years. The medical records were reviewed for the incidence and type of associated anomalies in addition to the details of the management of the EHBA. Results: Of the137 infants, 40 (29.2% were diagnosed as having 58 anomalies. The majority of patients had presented in the 3 rd month of life; mean age was 81 ± 33 days (range = 20-150 days. There were 32 males and 8 females; boys with EHBA had a higher incidence of associated anomalies. Of these 40 patients, 22 (37.9% had vascular anomalies, 13 patients (22.4% had hernias (umbilical-10, inguinal-3, 7 patients (12.1% had intestinal malrotation, 4 patients (6.8% had choledochal cyst, 1 patient (1.7% had Meckel′s diverticulum, 3 patients (5% had undergone prior treatment for jejunoileal atresias (jejunal-2, ileal-1, 2 patients (3.4% had undergone prior treatment for esophageal atresia and tracheoesophageal fistula, 2 patients (3.4% had spleniculi, and 2 patients (3.4% were diagnosed as having situs inversus. Conclusions: The most common associated anomalies in our study were related to the vascular variation at the porta hepatis and the digestive system. The existence of anomalies in distantly developing anatomic regions in patients with EHBA supports the possibility of a "generalized" insult during embryogenesis rather than a "localized" defect. In addition, male infants were observed to have significantly more associated anomalies as compared with the female infants in contrast to earlier reports.

  18. PHACE Syndrome: Persistent Fetal Vascular Anomalies: A Case Report

    OpenAIRE

    Prochazka, V.; Hrbac, T.; Chmelova, J.; Skoloudik, D.; M. Prochazka

    2005-01-01

    PHACE(S) syndrome is an acronym for neurocutaneous disease encompassing the expression of (P) posterior cranial fossa malformations, (H) facial haemangiomas, (A) arterial anomalies, (C) aortic coarctaion and other cardiac defects, (E) eye abnormalities and (S) for sternal malformation or stenotic arterial diseases. We report on a case of PHACE syndrome complete expression with persistent fetal vascular anomalies unusually in a 55-year-old women with large bilateral facial and neck haemangioma...

  19. Congenital anomalies in paediatric surgery in North India

    Directory of Open Access Journals (Sweden)

    Babita Jangra

    2014-01-01

    Full Text Available Background: Congenitalmal formation represents defects in morphogenesis during early foetal life. Congenital anomalies account for 8-15% of perinatal deaths and 13-16% of neonatal deaths in India. The proportion of perinatal deaths due to congenital malformations is increasing as a result of reduction of mortality due to other causes owing to the improvement in perinatal and neonatal care. Materials and Methods: A retrospective record based study was conducted in the Paediatric Surgery Department of a Tertiary Care Institute of North India. The records of over a decade (2003-2012 were analysed. A total of 4305 cases of congenital anomalies were recorded in the study. All the data were entered in the excel spread sheet and analysed in SPSS version 17. (Statistical Package for the Social Sciences, a software package used for statistical analysis, officially named "IBM SPSS Statistics". Results: Over the decade, a total of 14264 children were admitted in the paediatric surgery department with various problems. Out of these about one-third children (30.18% had one or other type of congenital anomalies. This trend remained almost constant over the decade within a range of 26.8-33.6%. About half of the total congenital anomalies belonged to the gastro-intestinal tract, followed by genitourinary tract, central nervous system and other anomalies. All the anomalies were more common in males and were found in children belonging to rural communities. Conclusions: All the neonates should be examined with scrutiny for overt as well as occult congenital anomalies and Paediatric surgical care should be considered as an essential component of child health programmes in developing populations. Moreover, it is necessary to establish a registry system for congenital anomalies.

  20. Right Lung Agenesis; Isolated and with Accompanied Anomalies

    Directory of Open Access Journals (Sweden)

    Yakup Canıtez

    2013-12-01

    Full Text Available Right lung agenesis is a rare anomaly that can be isolated or accompanied by system anomalies such as cardiac, skeletal or urinary systems. Case 1, a four-month-old girl, was brought because of respiratory distress. Patient had polydactyly, syndactyly of right thumb, right mandibular hypoplasia and low-set dysmorphic ears. Lung x-ray and thorax computerized tomography (CT were consistent with right pulmonary agenesis and butterfly vertebra was evident in the 7th thoracic level. Thoracic CT angiography revealed narrowing of the left main bronchus and esophagus due to compression of aorta, left pulmonary artery and right atrium. In bronchoscopy, narrowing due to compression at the carina level was seen and right main bronchus was not seen. In abdominal ultrasonography, right kidney placement anomaly (pelvic ectopia was present and renal scintigraphy revealed fusion in both kidneys. With these findings, it was found that right pulmonary agenesis was accompanied by ipsilateral radial ray anomaly, renal anomaly, vertebral anomaly and hemifacial microsomia. Case 2, a fifteen-year-old male patient, was diagnosed as pulmonary agenesis via chest x-ray, pulmonary CT and bronchoscopy after a wheezing episode when he was 2 months old. Patient had no complaint except for exhaustion that is aggravated by exercise during last year. In physical examination, he had a mild scoliosis toward right, respiratory sounds were diminished on right hemithorax and heart sounds were heard on right side. Chest x-ray and thoracic CT were consistent with right lung agenesis. No abnormality was found in echocardiography and abdominal ultrasonography was normal. Accompanied cardiovascular anomalies, distortions of intrathoracic structures and recurrent infections are main factors that affect mortality and morbidity. Here, two cases with right lung agenesis, isolated and accompanied by multiple anomalies, were presented. (Jo­ur­nal of Cur­rent Pe­di­at­rics 2013; 11: 134-7

  1. S Matrix Proof of Consistency Condition Derived from Mixed Anomaly

    Science.gov (United States)

    Bhansali, Vineer

    For a confining quantum field theory with conserved current J and stress tensor T, the JJJ> and anomalies computed in terms of elementary quanta must be precisely equal to the same anomalies computed in terms of the exact physical spectrum if the conservation law corresponding to J is unbroken. These strongly constrain the allowed representations of the low energy spectrum. We present a proof of the latter consistency condition based on the proof by Coleman and Grossman of the former consistency condition.

  2. Cervical vertebral anomalies in patients with obstructive sleep apnea

    Directory of Open Access Journals (Sweden)

    Saugat Ray

    2015-01-01

    Full Text Available Objective: The aim of this study was to find an association between the patients with obstructive sleep apnea (OSA and with cervical vertebral anomalies and any further correlation between various anomalies with varying severities of OSA. Materials and Methods: The sample consisted lateral cephalograms of 70 subjects who were diagnosed with OSA and 70 other orthodontic patients who were selected as a control group. The lateral radiographs of both cases and controls were traced and findings were recorded. Results: In total, 21.42% of subjects in the OSA group and 8.57% in the control group were affected with cervical vertebrae anomalies. The statistical analysis reveals that the number of subjects affected with cervical vertebrae anomalies in OSA group is highly significant. A number of cases of fusion were higher than posterior arch deficiency in OSA group and equal in the control group. However, in both the groups, the number of cases with two vertebrae fusion was higher. Further, the higher number of two vertebrae fusion cases in OSA group was found to be statistically significant. The findings of one-way ANOVA for OSA cases reveals the number of cases affected with cervical vertebrae anomalies were statistically highly significant (P < 0.01 in severe cases of OSA. Conclusion: Patients of cervical vertebral anomalies may be at higher risk of developing OSA, and the possibility of the presence of cervical vertebral anomalies may increase with the increase in the severity of OSA. The most common vertebral anomaly was found to be two vertebral fusions.

  3. Entropy discrepancy and total derivatives in trace anomaly

    Directory of Open Access Journals (Sweden)

    Amin Faraji Astaneh

    2015-12-01

    Full Text Available In this note we address the discrepancy found by Hung, Myers and Smolkin between the holographic calculation of entanglement entropy (using the Jacobson–Myers functional for the holographic minimal surface and the CFT trace anomaly calculation if one uses the Wald prescription to compute the entropy in six dimensions. As anticipated in our previous work [1] the discrepancy originates entirely from a total derivative term present in the trace anomaly in six dimensions.

  4. Long-term sedimentary recycling of rare sulphur isotope anomalies.

    Science.gov (United States)

    Reinhard, Christopher T; Planavsky, Noah J; Lyons, Timothy W

    2013-05-01

    The accumulation of substantial quantities of O2 in the atmosphere has come to control the chemistry and ecological structure of Earth's surface. Non-mass-dependent (NMD) sulphur isotope anomalies in the rock record are the central tool used to reconstruct the redox history of the early atmosphere. The generation and initial delivery of these anomalies to marine sediments requires low partial pressures of atmospheric O2 (p(O2); refs 2, 3), and the disappearance of NMD anomalies from the rock record 2.32 billion years ago is thought to have signalled a departure from persistently low atmospheric oxygen levels (less than about 10(-5) times the present atmospheric level) during approximately the first two billion years of Earth's history. Here we present a model study designed to describe the long-term surface recycling of crustal NMD anomalies, and show that the record of this geochemical signal is likely to display a 'crustal memory effect' following increases in atmospheric p(O2) above this threshold. Once NMD anomalies have been buried in the upper crust they are extremely resistant to removal, and can be erased only through successive cycles of weathering, dilution and burial on an oxygenated Earth surface. This recycling results in the residual incorporation of NMD anomalies into the sedimentary record long after synchronous atmospheric generation of the isotopic signal has ceased, with dynamic and measurable signals probably surviving for as long as 10-100 million years subsequent to an increase in atmospheric p(O2) to more than 10(-5) times the present atmospheric level. Our results can reconcile geochemical evidence for oxygen production and transient accumulation with the maintenance of NMD anomalies on the early Earth, and suggest that future work should investigate the notion that temporally continuous generation of new NMD sulphur isotope anomalies in the atmosphere was likely to have ceased long before their ultimate disappearance from the rock record.

  5. Prevalence of inner ear anomalies among cochlear implant candidates

    OpenAIRE

    Aldhafeeri, Ahmad M.; Alsanosi, Abdulrahman A.

    2016-01-01

    Objectives: To determine the prevalence of inner ear anomalies and the frequency of different anomaly types among cochlear implant recipients. Methods: This study included a retrospective chart review of all patients who received cochlear implants between January 2009 and January 2013 in King Abdulaziz University Hospital cochlear implant program in Riyadh, Saudi Arabia. All subjects underwent thin-cut CT of the temporal bone and MRI. The collected data included age, gender, and CT and MRI fi...

  6. Diagnosis of Fetal Central Nervous System Anomalies by Ultrasonography

    OpenAIRE

    F. Tuncay Ozgunen

    2003-01-01

    During the last 30 years, one of the most important instruments in diagnosis is ultrasonograph. It has an indispensible place in obstetrics. Its it possible to evaluate normal fetal anatomy, to follow-up fetal growth and to diagnose fetal congenital anomalies by ultrasonography. Central nervous system anomalies is the one of the most commonly seen and the best time for screening is between 18- and 22-week of pregnancy. In this paper, it is presented the sonographic features of some outstandin...

  7. Anomaly Analysis of Hawking Radiation from Acoustic Black Hole

    CERN Document Server

    Kim, Wontae

    2007-01-01

    The Hawking radiation from the three dimensional rotating acoustic black hole is considered from the viewpoint of anomaly cancellation method initiated by Robinson and Wilczek. Quantum field near the horizon is effectively described by two dimensional charged field with a charge identified as the angular momentum m. The fluxes of charge and energy are obtained from the anomaly cancellation condition and regularity at the horizon, and are shown to match with those of the two dimensional black body radiation at the Hawking temperature.

  8. Anomaly detection in GPS data based on visual analytics

    OpenAIRE

    Yu, Y.; Liao, Z; Chen, B

    2010-01-01

    Modern machine learning techniques provide robust approaches for data-driven modeling and critical information extraction, while human experts hold the advantage of possessing high-level intelligence and domain-specific expertise. We combine the power of the two for anomaly detection in GPS data by integrating them through a visualization and human-computer interaction interface. In this paper we introduce GPSvas (GPS Visual Analytics System), a system that detects anomalies in GPS data using...

  9. Refining geoid and vertical gradient of gravity anomaly

    Directory of Open Access Journals (Sweden)

    Zhang Chijun

    2011-11-01

    Full Text Available We have derived and tested several relations between geoid (N and quasi-geoid (ζ with model validation. The elevation correction consists of the first-term (Bouguer anomaly and second-term (vertical gradient of gravity anomaly. The vertical gradient was obtained from direct measurement and terrain calculation. The test results demonstrated that the precision of geoid can reach centimeter-level in mountains less than 5000 meters high.

  10. A New Methodology for Early Anomaly Detection of BWR Instabilities

    Energy Technology Data Exchange (ETDEWEB)

    Ivanov, K. N.

    2005-11-27

    The objective of the performed research is to develop an early anomaly detection methodology so as to enhance safety, availability, and operational flexibility of Boiling Water Reactor (BWR) nuclear power plants. The technical approach relies on suppression of potential power oscillations in BWRs by detecting small anomalies at an early stage and taking appropriate prognostic actions based on an anticipated operation schedule. The research utilizes a model of coupled (two-phase) thermal-hydraulic and neutron flux dynamics, which is used as a generator of time series data for anomaly detection at an early stage. The model captures critical nonlinear features of coupled thermal-hydraulic and nuclear reactor dynamics and (slow time-scale) evolution of the anomalies as non-stationary parameters. The time series data derived from this nonlinear non-stationary model serves as the source of information for generating the symbolic dynamics for characterization of model parameter changes that quantitatively represent small anomalies. The major focus of the presented research activity was on developing and qualifying algorithms of pattern recognition for power instability based on anomaly detection from time series data, which later can be used to formulate real-time decision and control algorithms for suppression of power oscillations for a variety of anticipated operating conditions. The research being performed in the framework of this project is essential to make significant improvement in the capability of thermal instability analyses for enhancing safety, availability, and operational flexibility of currently operating and next generation BWRs.

  11. Interpretation of magnetic anomalies using a genetic algorithm

    Science.gov (United States)

    Kaftan, İlknur

    2017-07-01

    A genetic algorithm (GA) is an artificial intelligence method used for optimization. We applied a GA to the inversion of magnetic anomalies over a thick dike. Inversion of nonlinear geophysical problems using a GA has advantages because it does not require model gradients or well-defined initial model parameters. The evolution process consists of selection, crossover, and mutation genetic operators that look for the best fit to the observed data and a solution consisting of plausible compact sources. The efficiency of a GA on both synthetic and real magnetic anomalies of dikes by estimating model parameters, such as depth to the top of the dike (H), the half-width of the dike (B), the distance from the origin to the reference point (D), the dip of the thick dike (δ), and the susceptibility contrast (k), has been shown. For the synthetic anomaly case, it has been considered for both noise-free and noisy magnetic data. In the real case, the vertical magnetic anomaly from the Pima copper mine in Arizona, USA, and the vertical magnetic anomaly in the Bayburt-Sarıhan skarn zone in northeastern Turkey have been inverted and interpreted. We compared the estimated parameters with the results of conventional inversion methods used in previous studies. We can conclude that the GA method used in this study is a useful tool for evaluating magnetic anomalies for dike models.

  12. Electromagnetic Signatures of the Chiral Anomaly in Weyl Semimetals

    Science.gov (United States)

    Barnes, Edwin; Heremans, J. J.; Minic, Djordje

    2016-11-01

    Weyl semimetals are predicted to realize the three-dimensional axial anomaly first discussed in particle physics. The anomaly leads to unusual transport phenomena such as the chiral magnetic effect in which an applied magnetic field induces a current parallel to the field. Here we investigate diagnostics of the axial anomaly based on the fundamental equations of axion electrodynamics. We find that materials with Weyl nodes of opposite chirality and finite energy separation immersed in a uniform magnetic field exhibit an anomaly-induced oscillatory magnetic field with a period set by the chemical potential difference of the nodes. In the case where a chemical potential imbalance is created by applying parallel electric and magnetic fields, we find a suppression of the magnetic-field component parallel to the electric field inside the material for rectangular samples, suggesting that the chiral magnetic current opposes this imbalance. For cylindrical geometries, we instead find an enhancement of this magnetic-field component along with an anomaly-induced azimuthal component. We propose experiments to detect such magnetic signatures of the axial anomaly.

  13. Radiologic imaging of congenital gastrointestinal anomalies in infants

    Directory of Open Access Journals (Sweden)

    Leny Zabidi

    2014-11-01

    Full Text Available Background Congenital gastrointestinal anomalies may manifest signs or symptoms in the first few days of life, most commonly in the form of obstructions. Radiologic imaging plays an important role in diagnosis confirmation and surgical correction plans. Most cases may be diagnosed by plain radiographs alone, but CT scans and MRI may be needed to make accurate diagnoses, especially in difficult cases. Objective To report radiologic imaging findings in infants with congenital gastrointestinal anomalies. Methods For this retrospective, cross-sectional study we took secondary data from medical records of infants with congenital gastrointestinal anomalies in Dr. Kariadi Hospital, Semarang, Indonesia from January 2010 – June 2011. Diagnosis of congenital anomalies was confirmed by clinical manifestation and radiologic imaging. Radiologic findings were reviewed by a single radiologist on duty at that time. Data is presented in the form of frequency distribution. Results Subjects consisted of 50 males and 23 females. The most common complaints were vomiting in 14 subjects (19%, abdominal distension in 31 subjects (43%, and fecal passage dysfunction in 28 subjects (38%. Radiologic imaging of subjects with congenital gastrointestinal anomalies revealed the following conditions: anal atresia in 28 subjects (38%, congenital megacolon in 21 subjects (29%, esophageal atresia in 14 subjects (19%, duodenal atresia in 9 subjects (12%, and pyloric atresia in 1 subject (2%. Conclusion Using radiologic imaging of infants with congenital gastrointestinal anomalies, the most to least common conditions found were anal atresia, congenital megacolon, esophageal atresia, duodenal atresia, and pyloric atresia.

  14. Congenital anomalies associated with trisomy 18 or trisomy 13

    DEFF Research Database (Denmark)

    Springett, Anna; Wellesley, Diana; Greenlees, Ruth

    2015-01-01

    The aim of this study was to examine the prevalence of trisomies 18 and 13 in Europe and the prevalence of associated anomalies. Twenty-five population-based registries in 16 European countries provided data from 2000-2011. Cases included live births, fetal deaths (20+ weeks' gestation......), and terminations of pregnancy for fetal anomaly (TOPFAs). The prevalence of associated anomalies was reported in live births. The prevalence of trisomy 18 and trisomy 13 were 4.8 (95%CI: 4.7-5.0) and 1.9 (95%CI: 1.8-2.0) per 10,000 total births. Seventy three percent of cases with trisomy 18 or trisomy 13 resulted...... in a TOPFA. Amongst 468 live born babies with trisomy 18, 80% (76-83%) had a cardiac anomaly, 21% (17-25%) had a nervous system anomaly, 8% (6-11%) had esophageal atresia and 10% (8-13%) had an orofacial cleft. Amongst 240 Live born babies with trisomy 13, 57% (51-64%) had a cardiac anomaly, 39% (33-46%) had...

  15. Thermodynamic mechanism of density anomaly of liquid water

    Directory of Open Access Journals (Sweden)

    Makoto eYasutomi

    2015-03-01

    Full Text Available Although density anomaly of liquid water has long been studied by many different authors up to now, it is not still cleared what thermodynamic mechanism induces the anomaly. The thermodynamic properties of substances are determined by interparticle interactions. We analyze what characteristics of pair potential cause the density anomaly on the basis of statistical mechanics and thermodynamics using a thermodynamically self-consistent Ornstein-Zernike approximation (SCOZA. We consider a fluid of spherical particles with a pair potential given by a hard-core repulsion plus a soft-repulsion and an attraction. We show that the density anomaly occurs when the value of the soft-repulsive potential at hard-core contact is in some proper range, and the range depends on the attraction. Further, we show that the behavior of the excess internal energy plays an essential role in the density anomaly and the behavior is mainly determined by the values of the soft-repulsive potential, especially near the hard core contact. Our results show that most of ideas put forward up to now are not the direct causes of the density anomaly of liquid water.

  16. A New Methodology for Early Anomaly Detection of BWR Instabilities

    Energy Technology Data Exchange (ETDEWEB)

    Ivanov, K. N.

    2005-11-27

    The objective of the performed research is to develop an early anomaly detection methodology so as to enhance safety, availability, and operational flexibility of Boiling Water Reactor (BWR) nuclear power plants. The technical approach relies on suppression of potential power oscillations in BWRs by detecting small anomalies at an early stage and taking appropriate prognostic actions based on an anticipated operation schedule. The research utilizes a model of coupled (two-phase) thermal-hydraulic and neutron flux dynamics, which is used as a generator of time series data for anomaly detection at an early stage. The model captures critical nonlinear features of coupled thermal-hydraulic and nuclear reactor dynamics and (slow time-scale) evolution of the anomalies as non-stationary parameters. The time series data derived from this nonlinear non-stationary model serves as the source of information for generating the symbolic dynamics for characterization of model parameter changes that quantitatively represent small anomalies. The major focus of the presented research activity was on developing and qualifying algorithms of pattern recognition for power instability based on anomaly detection from time series data, which later can be used to formulate real-time decision and control algorithms for suppression of power oscillations for a variety of anticipated operating conditions. The research being performed in the framework of this project is essential to make significant improvement in the capability of thermal instability analyses for enhancing safety, availability, and operational flexibility of currently operating and next generation BWRs.

  17. [Fetal ocular anomalies: the advantages of prenatal magnetic resonance imaging].

    Science.gov (United States)

    Brémond-Gignac, D; Copin, H; Elmaleh, M; Milazzo, S

    2010-05-01

    Congenital ocular malformations are uncommon and require prenatal diagnosis. Severe anomalies are more often detected by trained teams and minor anomalies are more difficult to identify and must be systematically sought, particularly when multiple malformations or a family and maternal history is known. The prenatal diagnosis-imaging tool most commonly used is ultrasound but it can be completed by magnetic resonance imaging (MRI), which contributes crucial information. Fetal dysmorphism can occur in various types of dysfunction and prenatal diagnosis must recognize fetal ocular anomalies. After systematic morphologic ultrasound imaging, different abnormalities detected by MRI are studied. Classical parameters such as binocular and interorbital measurements are used to detect hypotelorism and hypertelorism. Prenatal ocular anomalies such as cataract microphthalmia, anophthalmia, and coloboma have been described. Fetal MRI added to prenatal sonography is essential in detecting cerebral and general anomalies and can give more information on the size and morphology of the eyeball. Fetal abnormality detection includes a detailed family and maternal history, an amniotic fluid sample for karyotype, and other analyses for a better understanding of the images. Each pregnancy must be discussed with all specialists for genetic counseling. With severe malformations, termination of pregnancy is proposed because of risk of blindness and associated cerebral or systemic anomalies. Early prenatal diagnosis of ocular malformations can also detect associated abnormalities, taking congenital cataracts that need surgical treatment into account as early as possible. Finally, various associated syndromes need a pediatric check-up that could lead to emergency treatment.

  18. Structural chromosomal anomalies detected by prenatal genetic diagnosis: our experience.

    Science.gov (United States)

    Farcaş, Simona; Crişan, C D; Andreescu, Nicoleta; Stoian, Monica; Motoc, A G M

    2013-01-01

    The prenatal diagnosis is currently widely spread and facilitates the acquiring of important genetic information about the fetus by a rate extremely accelerate and considered without precedent. In this paper, we like to present our experience concerning the genetic diagnosis and counseling offered for pregnancies in which a structural chromosomal aberration was found. The study group is formed by 528 prenatal samples of amniotic fluid and chorionic villi, received by our laboratory from 2006 through October 2012 for cytogenetic diagnosis. The appropriate genetic investigation was selected based on the indications for prenatal diagnosis. The cases with structural chromosomal anomalies and polymorphic variants were analyzed as regard to the maternal age, gestational age, referral indications and type of chromosomal anomaly found. A total number of 21 structural chromosomal anomalies and polymorphic variants were identified in the study group. Out of 21 structural chromosomal anomalies and polymorphic variants, six deletions and microdeletions, four situations with abnormal long "p" arm of acrocentric chromosomes, two duplications, two reciprocal translocations, two inversions, two additions, one Robertsonian translocation associating trisomy 13, one 9q heteromorphism and one complex chromosome rearrangement were noticed. To the best of our knowledge, this is the first Romanian study in which the diagnostic strategies and the management of the prenatal cases with structural rearrangements are presented. The data provided about the diagnosis strategy and the management of the prenatal cases with structural chromosomal anomalies represents a useful tool in genetic counseling of pregnancies diagnosed with rare structural chromosomal anomalies.

  19. Ant colony optimization-based firewall anomaly mitigation engine.

    Science.gov (United States)

    Penmatsa, Ravi Kiran Varma; Vatsavayi, Valli Kumari; Samayamantula, Srinivas Kumar

    2016-01-01

    A firewall is the most essential component of network perimeter security. Due to human error and the involvement of multiple administrators in configuring firewall rules, there exist common anomalies in firewall rulesets such as Shadowing, Generalization, Correlation, and Redundancy. There is a need for research on efficient ways of resolving such anomalies. The challenge is also to see that the reordered or resolved ruleset conforms to the organization's framed security policy. This study proposes an ant colony optimization (ACO)-based anomaly resolution and reordering of firewall rules called ACO-based firewall anomaly mitigation engine. Modified strategies are also introduced to automatically detect these anomalies and to minimize manual intervention of the administrator. Furthermore, an adaptive reordering strategy is proposed to aid faster reordering when a new rule is appended. The proposed approach was tested with different firewall policy sets. The results were found to be promising in terms of the number of conflicts resolved, with minimal availability loss and marginal security risk. This work demonstrated the application of a metaheuristic search technique, ACO, in improving the performance of a packet-filter firewall with respect to mitigating anomalies in the rules, and at the same time demonstrated conformance to the security policy.

  20. Imaging riometer observation in South Atlantic Anomaly

    Science.gov (United States)

    Makita, Kazuo; Hoshino, Mituo; Kato, Yasuo; Masanori, Nishino; Schuch, Nelson Jorge; Foppiano, Alberto J.; Ovalle, Ellias; Tanaka, Yoshi; Monreal, Ricardo

    The total geomagnetic field intensity is especially weak around the southern part of Latin America. This region is called South Atlantic Anomaly (SAA). We named this singularity region as "Geomagnetic Hole". High energetic particles larger than 100keV are precipitating into Geomagnetic Hole from Radiation belt. Since the intensity of Geomagnetic Hole is sharply decreasing now, the quantity of particle precipitation in this region will become more large near future. In order to examine Geomagnetic Hole phenomena, imaging riometer, photometer and other instruments are installed at INPE southern space observatory (SSO) and started observation since 1997. We also installed similar instruments and continue the observation at Concepcion / Punta Arenas in Chile and Kakioka in Japan. We study Cosmic Noise Absorption (CNA) obtained by imaging riometer and their relationships to particle data by GOES Satellite. From our analysis results, typical CNA events are observed in associated with big geomagnetic storm period at SSO and GOES particle date shows sharp decrease of energetic particle in this time. It suggests that radiation belt particles are precipitating to Geomagnetic Hole during ge-omagnetic storm period. Sometimes, CNA events are also observed during big substorm period and during the X-ray flare event. We also examined Punta Arenas, Concepcion and Kakioka imaging riometer data during geomagnetic storm time. However, typical CNA corresponding to SSO event is not found in our analysis. Our preliminary result suggests that particle precip-itation region is confined in a limited area around SSO, Brazil. On the other hands, Traveling Ionosphere Disturbance (TID) events are also observed at Concepcion and Kakioka as well as SSO by imaging riometer. Generally, number density of ionosphere electron increases and electron density disturbance with stripe-like structures are traveling during TID event. From imaging riometer observation, similar stripe-like CNA structure are