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Sample records for correct severe post-tubercular

  1. [Correction of severe alar retraction with alar rotation flap].

    Science.gov (United States)

    Hong, Chun; Zheng, Dongxue; Lu, Lixin

    2015-01-01

    To investigate the therapeutic effect of alar rotation flap for severe alar retraction. Patients with severely retracted alar underwent ala reconstruction using alar rotation flaps and autogenous cartilage batten grafts. First, costal cartilage was used to reshape the nasal tip and nasal dorsum. Then cartilage patch was used to extend and thicken the retracted alar. Then the alar rotation flap was transferred to correct retracted alar. Fourteen patients with severe alar retraction underwent alar reconstruction with alar rotation flap and alar batten grafts. The alar retraction was corrected in all cases, with improvements functionally and aesthetically. No recurrence of alar retraction was noted. The incision healed with acceptable cosmetic results, with obvious scar in only one patient (one side). The alar rotation flap is an effective and reliable surgical option to correct severe alar retraction. Scar can be kept inconspicuous by precise placement of the incision within the junction of the ala and the nasal dorsum, following principles of the aesthetic nasal subunits.

  2. [Pterigium colli: secondary surgical correction of one severe case].

    Science.gov (United States)

    Posso, C M Z; Wolff, G A; Suarez, L D

    2012-06-01

    Congenital web neck is a deformity hardly ever reported in the English literature. It is usually associated to Ulrrich-Turner syndrome. There are several options to correct this deformity, but in severe cases complete correction of the web and the abnormal back hair is not always possible. We present our experience with a secondary case where previous butterfly method was employed, a combined procedure was used achieving a satisfactory result. We considered that this technique is useful and offers an important improvement of the contour.

  3. Is correction of severe hypoalbuminemia necessary in the critically ill?

    Institute of Scientific and Technical Information of China (English)

    Joachim Boldt

    2008-01-01

    @@ The rationale for using albumin in the critically ill intensive care unit (ICU) patient showing hypoalbuminemia is to increase colloid oncotic pressure (COP) to prevent extravasation of fluid from the intra- to the extravascular space.Correction of low albumin plasma levels is also justified by the role of albumin for binding and transportation of drugs and for its possibly beneficial role as an oxygen radical scavenger.1 Hypoalbuminemic patients have been shown to have a higher morbidity and mortality compared with patients with normal serum albumin levels.2 A serum albumin level of <2.0 g/dl has been documented to be associated with a mortality of nearly 100%.3 We report a patient showing an albumin plasma level of <0.5 g/dl on admission in whom no human albumin (HA) has been given.

  4. Dermal grafts for correction of severe chordee associated with hypospadias.

    Science.gov (United States)

    Horton, C E; Gearhart, J P; Jeffs, R D

    1993-08-01

    We report on 24 patients with hypospadias and severe chordee that could not be straightened with conventional techniques. We used small dermal grafts to augment the ventral tunica albuginea, which resulted in a completely straight, normal appearing erection in all patients. Subsequent urethroplasty was not complicated by the presence of the dermal graft. This procedure is technically straightforward and consistently results in a completely straight penis. Although required only rarely in hypospadias surgery, we recommend the dermal graft technique of tunica albuginea augmentation for cases of refractory chordee.

  5. [Pre-operative correction of severe scoliosis by halo and walking-frame system (author's transl)].

    Science.gov (United States)

    Durand, Y; Rigault, P; Pouliquen, J C; le Henaff, J C

    1980-01-01

    Ten cases of very severe scoliotic curves have been corrected pre-operatively by permanent traction with a halo suspended at a walking-frame device. The mean initial angulation was 110 degrees and the mean pre-operative correction was 48% for a mean use of two months. This procedure permits the patients a sub-normal activity, gives a good correction as "halo-cast" or "halo-pelvic" and avoids all cutaneous, neurological or psychological complications.

  6. Correction

    DEFF Research Database (Denmark)

    Pinkevych, Mykola; Cromer, Deborah; Tolstrup, Martin

    2016-01-01

    [This corrects the article DOI: 10.1371/journal.ppat.1005000.][This corrects the article DOI: 10.1371/journal.ppat.1005740.][This corrects the article DOI: 10.1371/journal.ppat.1005679.].......[This corrects the article DOI: 10.1371/journal.ppat.1005000.][This corrects the article DOI: 10.1371/journal.ppat.1005740.][This corrects the article DOI: 10.1371/journal.ppat.1005679.]....

  7. Correction of a Severely Rotated Maxillary Incisor by Elastics in Mixed Dentition Complicated by a Mesiodens.

    Science.gov (United States)

    Sidiq, Mohsin; Yousuf, Asif; Bhat, Manohar; Sharma, Rajesh; Bhargava, Neha; Ganta, Shravani

    2015-01-01

    The aim of this case study was to report a potentially convenient approach instead of a conventional orthodontic procedure for correcting severe rotation of anterior tooth of an 11-year-old Indian boy, with a mixed dentition class I malocclusion. The child reported seeking treatment for severely rotated upper right central incisor with mesiodens and a single tooth crossbite. The supernumerary tooth was first extracted and bondable buttons were placed on the rotated tooth, an appliance composed of a removable plate with Adam's clasp with distal extension and a loop for engagement of elastics was delivered. Circumferential supracrestal fibrotomy was performed on the corrected derotated tooth. Then, Hawley's appliance with a z-spring and posterior bite plane was fabricated and placed for correction of crossbite. Thus, this removable appliance can be a simplified and a cost-effective treatment alternative for derotation of anterior tooth, especially during the mixed dentition period. How to cite this article: Sidiq M, Yousuf A, Bhat M, Sharma R, Bhargava N, Ganta S. Correction of a Severely Rotated Maxillary Incisor by Elastics in Mixed Dentition Complicated by a Mesiodens. Int J Clin Pediatr Dent 2015;8(3):234-238.

  8. Correction of a severely rotated maxillary central incisor with the Whip device

    Science.gov (United States)

    Jahanbin, Arezoo; Baghaii, Bahareh; Parisay, Iman

    2009-01-01

    Objective The aim of this case report was to introduce an appliance that can be used for correcting severe rotation of anterior teeth in pre-adolescent children. Appliance design and testing This is a case report of an 11-year-old Iranian boy with a mixed dentition Class I malocclusion defined by a severe rotation of upper left central incisor and a mesiodens between the centrals. The supernumerary tooth was first extracted, and then a Whip device including removable appliance, a cantilever spring and bonded tube on rotated tooth was inserted into his mouth. After 8 months, the upper left central incisor was orthodontically brought into proper alignment. Circumferential supracrestal fibrotomy was done next to overcorrection of the tooth and one week after surgery, the device was removed and the retention was started. Conclusion The whip device, a removable appliance can be very effective for correcting severe rotation of anterior teeth. PMID:24151406

  9. Modeling Human Severe Combined Immunodeficiency and Correction by CRISPR/Cas9-Enhanced Gene Targeting.

    Science.gov (United States)

    Chang, Chia-Wei; Lai, Yi-Shin; Westin, Erik; Khodadadi-Jamayran, Alireza; Pawlik, Kevin M; Lamb, Lawrence S; Goldman, Frederick D; Townes, Tim M

    2015-09-08

    Mutations of the Janus family kinase JAK3 gene cause severe combined immunodeficiency (SCID). JAK3 deficiency in humans is characterized by the absence of circulating T cells and natural killer (NK) cells with normal numbers of poorly functioning B cells (T(-)B(+)NK(-)). Using SCID patient-specific induced pluripotent stem cells (iPSCs) and a T cell in vitro differentiation system, we demonstrate a complete block in early T cell development of JAK3-deficient cells. Correction of the JAK3 mutation by CRISPR/Cas9-enhanced gene targeting restores normal T cell development, including the production of mature T cell populations with a broad T cell receptor (TCR) repertoire. Whole-genome sequencing of corrected cells demonstrates no CRISPR/Cas9 off-target modifications. These studies describe an approach for the study of human lymphopoiesis and provide a foundation for gene correction therapy in humans with immunodeficiencies.

  10. Surgical correction of hypertrophic obstructive cardiomyopathy in a patient with severe hypertrophy and septal myocardial fibrosis.

    Science.gov (United States)

    Borisov, Konstantin Valentinovitch

    2012-10-01

    In patients with hypertrophic cardiomyopathy, myocardial fibrosis is an independent predictor of an adverse outcome. A new technique of hypertrophic obstructive cardiomyopathy (HOCM) surgical correction in patients with severe hypertrophy and septal myocardial fibrosis has been proposed. This approach avoids mechanical damage to the heart conduction system, and for the surgeon it improves visual inspection of the area to be resected. We present a case report of a 33-year old female patient with biventricular obstruction, extreme hypertrophy, septal myocardial fibrosis and episodes of ventricular tachycardia who underwent surgical correction according to this novel procedure. The advantage of the approach is an effective surgical treatment of HOCM in patients with severe hypertrophy and septal myocardial fibrosis who cannot be treated with the current surgical techniques.

  11. Class II correction in a growing patient with hyperdivergent growth patterns and severe overjet.

    Science.gov (United States)

    Park, Jae Hyun

    2010-01-01

    In general, the success of Class II treatment depends as much on the skill of the orthodontist as it does on a favorable facial-growth pattern. Lack of sufficient favorable growth during treatment will make it difficult to correct the skeletal malrelationship or significantly improve the facial profile. The case report presents the treatment of a patient with a Class II, Division 1 malocclusion with severe overjet and a hyperdivergent growth pattern. © 2011 BY QUINTESSENCE PUBLISHING CO, INC.

  12. Shortening Scarf osteotomy for correction of severe hallux valgus. Does shortening affect the outcome?

    Science.gov (United States)

    Karpe, Prasad; Killen, Marie C; Pollock, Raymond D; Limaye, Rajiv

    2016-12-01

    Translation and shortening of Scarf osteotomy allows correction of severe hallux valgus deformity. Shortening may result in transfer metatarsalgia. To evaluate outcome of patients undergoing shortening Scarf osteotomy for severe hallux valgus deformities. Fifteen patients (20feet, mean age 58 years) underwent shortening Scarf osteotomy for severe hallux valgus deformities. Outcomes were pre and postoperative AOFAS scores, IM and HV angles, patient satisfaction. Mean follow-up was 25 months (range 22-30). The IM angle improved from a median of 18.60 (range 13.4-26.20) preoperatively to 9.70 (range 8.0-13.70) postoperatively (8.9; 95% CI=7.6-10.3; posteotomies united. Shortening Scarf osteotomy is a viable option for treating severe hallux valgus deformities with no transfer metatarsalgia. Copyright © 2016 Elsevier Ltd. All rights reserved.

  13. Correction of Systemic Hemodynamics and Gas Exchange in Patients with Severe Brain Injury

    Directory of Open Access Journals (Sweden)

    S. Yu. Kozlov

    2005-01-01

    Full Text Available Intensive care of patients with severe brain injury (SBI should be performed, by taking into account damaging factors. The adequacy of correction of systemic hemodynamics and oxygen support in acute SBI determines the effectiveness of the performed treatment. Sixty-seven patients aged 21 to 68 years who had experienced SBI were examined and treated (28 patients were treated with the routine basic regimen and 39 were treated via goal-oriented correction of damaging factors. A comprehensive examination of the patients was made. The outcomes of therapy were assessed, by using the Glasgow coma scale (GCS. The episodes of hypoxia and arterial hypotension were detected in the virtually equal number of victims (as high as 90% in both groups. The outcomes of therapy were better in patients without arterial hypotension. The mean blood pressure was maintained at a level of higher than 90 mm Hg; the volume of circulating blood was replenished. Endotracheal intubation was made in patients with depressed consciousness (less than 9 scores by GCS if hypoxia was retained, which permitted controlled artificial ventilation to be performed. Amino acid drugs, fatty emulsions, hydroexyethyl starch preparations, and balanced enteral formulas were used to correct the internal environment. Goal-oriented correction of damaging factors in Group 2 reduced the number of poor outcomes and death rates.

  14. Differential Reinforcement of Correct Responses to Probes and Prompts in Picture-Name Training with Severely Retarded Children.

    Science.gov (United States)

    Olenick, Debra L.; Pear, Joseph J.

    1980-01-01

    A systematic sequence of prompt and probe trials was used to teach picture names to three severely retarded children (aged 4). For all children the fixed ratio schedule for correct responses to prompts, combined with the every correct response reinforced schedule for correct responses to probes, generated the best results. (Author/PHR)

  15. Open wedge metatarsal osteotomy versus crescentic osteotomy to correct severe hallux valgus deformity

    DEFF Research Database (Denmark)

    Wester, Jens Ulrik; Hamborg-Petersen, Ellen; Herold, Niels

    2016-01-01

    BACKGROUND: Different techniques of proximal osteotomies have been introduced to correct severe hallux valgus. The open wedge osteotomy is a newly introduced method for proximal osteotomy. The aim of this prospective randomized study was to compare the radiological and clinical results after...... operation for severe hallux valgus, comparing the open wedge osteotomy to the crescentic osteotomy which is our traditional treatment. METHODS: Forty-five patients with severe hallux valgus (hallux valgus angle >35̊, and intermetatarsal angle >15̊) were included in this study. The treatment was proximal...... open wedge osteotomy and fixation with plate (Hemax), group 1, or operation with proximal crescentic osteotomy and fixation with a 3mm cannulated screw, group 2. The mean age was 52 years (19-71). Forty-one females and four males were included. Clinical and radiological follow-ups were performed 4...

  16. Modeling Human Severe Combined Immunodeficiency and Correction by CRISPR/Cas9-Enhanced Gene Targeting

    Directory of Open Access Journals (Sweden)

    Chia-Wei Chang

    2015-09-01

    Full Text Available Mutations of the Janus family kinase JAK3 gene cause severe combined immunodeficiency (SCID. JAK3 deficiency in humans is characterized by the absence of circulating T cells and natural killer (NK cells with normal numbers of poorly functioning B cells (T–B+NK–. Using SCID patient-specific induced pluripotent stem cells (iPSCs and a T cell in vitro differentiation system, we demonstrate a complete block in early T cell development of JAK3-deficient cells. Correction of the JAK3 mutation by CRISPR/Cas9-enhanced gene targeting restores normal T cell development, including the production of mature T cell populations with a broad T cell receptor (TCR repertoire. Whole-genome sequencing of corrected cells demonstrates no CRISPR/Cas9 off-target modifications. These studies describe an approach for the study of human lymphopoiesis and provide a foundation for gene correction therapy in humans with immunodeficiencies.

  17. Optimization Correction Strength Using Contra Bending Technique without Anterior Release Procedure to Achieve Maximum Correction on Severe Adult Idiopathic Scoliosis

    Directory of Open Access Journals (Sweden)

    Ahmad Jabir Rahyussalim

    2016-01-01

    Full Text Available Adult scoliosis is defined as a spinal deformity in a skeletally mature patient with a Cobb angle of more than 10 degrees in the coronal plain. Posterior-only approach with rod and screw corrective manipulation to add strength of contra bending manipulation has correction achievement similar to that obtained by conventional combined anterior release and posterior approach. It also avoids the complications related to the thoracic approach. We reported a case of 25-year-old male adult idiopathic scoliosis with double curve. It consists of main thoracic curve of 150 degrees and lumbar curve of 89 degrees. His curve underwent direct contra bending posterior approach using rod and screw corrective manipulation technique to achieve optimal correction. After surgery the main thoracic Cobb angle becomes 83 degrees and lumbar Cobb angle becomes 40 degrees, with 5 days length of stay and less than 800 mL blood loss during surgery. There is no complaint at two months after surgery; he has already come back to normal activity with good functional activity.

  18. Skeletal anchorage for orthodontic correction of severe maxillary protrusion after previous orthodontic treatment.

    Science.gov (United States)

    Tanaka, Eiji; Nishi-Sasaki, Akiko; Hasegawa, Takuro; Nishio, Clarice; Kawai, Nobuhiko; Tanne, Kazuo

    2008-01-01

    The correction of a severe maxillary protrusion in an adult by distal movement of the maxillary molars has been one of the most difficult biomechanical problems in orthodontics. This article reports on the treatment of an adult case of severe maxillary protrusion and a large overjet treated with a skeletal anchorage system. A female patient, age 22 years and 3 months, complained of the difficulty of lip closure due to severe maxillary protrusion with a gummy smile. Overjet and overbite were +7.6 mm and -0.9 mm, respectively. She had a history of orthodontic treatment in which her maxillary first premolars were extracted. In order to conduct distal movement of the maxillary molars, anchor plates were placed in the zygomatic process. After achieving a Class I molar relationship, retraction and intrusion of the maxillary incisors were performed. After a 2-year treatment, an acceptable occlusion was achieved with a Class I molar relationship. Her convex facial profile with upper lip protrusion was considerably improved, and the lips showed less tension in lip closure. After a 2-year retention period, an acceptable occlusion was maintained without recurrence of maxillary protrusion, indicating a stability of the occlusion. The result of this treatment indicated that skeletal anchorage is of great importance as a remedy for achieving intrusion and retraction of the maxillary incisors in cases of severe maxillary protrusion with a patient who had previous orthodontic treatment.

  19. Refractive error change and vision improvement in moderate to severe hyperopic amblyopia after spectacle correction: Restarting the emmetropization process?

    Science.gov (United States)

    Chang, Ji Woong

    2017-01-01

    The aims of the study were to develop guidelines for prescribing spectacles for patients with moderate to severe hyperopic amblyopia and to demonstrate how emmetropization progresses. Children with hyperopic amblyopia who had a spherical equivalent of ≥ +4.0 diopters (D) or more were included, while those who had astigmatism of > 2.0 D or anisometropia of > 2.0 D were excluded. The patients were divided into a full correction group and an under-correction group according to the amount of hyperopia correction applied. The under-correction group was further subdivided into a fixed under-correction group and a post-cycloplegic refraction (PCR) under-correction group. The duration of amblyopia treatment and changes in initial hyperopia were compared between the groups. In total, 76 eyes of 38 patients were analyzed in this study. The full correction group and under-correction group were subjected to 5.5 months and 5.9 months of amblyopia treatment, respectively (P = 0.570). However, the PCR under-correction group showed more rapid improvement (2.9 months; P = 0.001). In the under-correction group, initial hyperopia was decreased by -0.28 D and -0.49 D at 6 months and 12 months, respectively, after initial cycloplegic refraction. Moreover, the amount of hyperopia under-correction was correlated with the amount of hyperopia reduction (P = 0.010). The under-correction of moderate to severe hyperopic amblyopia has beneficial effects for treating amblyopia and activating emmetropization. PCR under-correction can more rapidly improve visual acuity, while both fixed under-correction and PCR under-correction can induce emmetropization and effectively reduce initial hyperopia.

  20. Lipid Metabolic Disturbances in Severe Sepsis: Clinical Significance and New Methods of Correction

    Directory of Open Access Journals (Sweden)

    O. G. Malkova

    2009-01-01

    Full Text Available Objective: to reveal the basic regularities in the development of lipid metabolic disturbances in severe sepsis and to evaluate the efficiency of parenteral use of new balanced lipid emulsions in this cohort of patients. Subjects and methods. A prospective study was conducted in 88 patients with severe sepsis of different etiologies in the intensive care unit (ICI, Sverdlovsk Regional Clinical Hospital One. Among the lipid metabolic parameters, serum cholesterol, triglycerides (TG, high-density lipoproteins, low-density lipoproteins, and atherogenicity index were measured. Out of the systemic inflammatory markers and the additional criteria for sepsis severity, the serum levels of C-reactive protein, nitric oxide, lactate, D-dimers, the anti-inflammatory cytokine IL-4 and the proinflammatory cytokine IL-8 were determined. Serum was taken on days 1, 3, 5, and 7 after admission to the ICI. The quantitative attributes were comparatively analyzed by the statistical program «Statistica 6.0». Results. The severity assessed by the APACHE II scale, the degree of multiple organ failures (MOF evaluated by the SOFA scale, and lung lesion according to the MURREY scale were found to be closely related to the baseline serum TG levels in patients with severe sepsis. The findings suggest that patients with high TG levels have much higher resuscitative mortality rates. The clinical evaluation of the efficiency of the new method for correction of lipid metabolic disturbances in severe sepsis has indicated that the patients receiving balanced (omega-3 fatty acids-enriched fat emulsions as 20% Lipoplus solution had lower APACHE II scores within the first 7 days of intensive therapy and significantly more positive SOFA MOF changes. Specific changes were revealed in the presence of systemic inflammatory markers, such as C-reactive protein, IL-8, and IL-4, which confirms that balanced lipid emulsions are able to affect the system of pro- and anti

  1. Orthognathic Surgery for the Correction of Severe Skeletal Class III Malocclusion.

    Science.gov (United States)

    Kafle, D; Upadhayaya, C; Chaurasia, N; Agarwal, A

    2016-01-01

    Skeletal Malocclusions results from the abnormal position of maxilla and mandible in relation with cranial base. These types of malocclusion are commonly treated by orthodontic teeth movement known as camouflage orthodontics. However severe skeletal malocclusions cannot be treated by orthodontics alone. Such cases need surgical intervention to align the position of the jaw along with orthodontic correction. This procedure is commonly known as Orthognathic Surgery. Orthognathic Surgery dates back to early eighteenth century but became popular on mid twentieth century. Though the prevalence of skeletal malocclusion is more than 1% the treatment facility was not available in Nepal till 2012. Here we present a case of Skeletal Class III malocclusion treated at Dhulikhel Hospital, Kathmandu University Hospital. For this case, double jaw surgery was performed by le-Fort I osteotomy and Bilateral Sagital Split Osteotomy. Orthognathic surgery has been routinely performed at this centre since then.

  2. [Vertebral column growth in children after surgical correction of severe kyphosis in tuberculosis spondylitis].

    Science.gov (United States)

    Pershin, A A; Mushkin, A Iu

    2008-01-01

    The growth of the unit of vertebrae and intact vertebrae outside and within the instrumental fixation area was studied in children operated on for tuberculosis spondylitis complicated by severe kyphotic deformity. There was a considerable growth retardation of blocked vertebrae after radical spinal repair from the growth of intact vertebrae. Instrumental fixation of the vertebral column after its radical reconstruction causes no considerable retardation of the vertical growth of intact vertebral bodies; however, it leads to the advanced growth of their anterior versus posterior portions, which mediates a supplementary self-correction of residual kyphosis during growth. When compression implants are presented in the body for 2 years or more, most children develop degeneration of intervertebral risks within the fixation area.

  3. Correction

    CERN Document Server

    2002-01-01

    Tile Calorimeter modules stored at CERN. The larger modules belong to the Barrel, whereas the smaller ones are for the two Extended Barrels. (The article was about the completion of the 64 modules for one of the latter.) The photo on the first page of the Bulletin n°26/2002, from 24 July 2002, illustrating the article «The ATLAS Tile Calorimeter gets into shape» was published with a wrong caption. We would like to apologise for this mistake and so publish it again with the correct caption.

  4. Correction

    CERN Multimedia

    2002-01-01

    The photo on the second page of the Bulletin n°48/2002, from 25 November 2002, illustrating the article «Spanish Visit to CERN» was published with a wrong caption. We would like to apologise for this mistake and so publish it again with the correct caption.   The Spanish delegation, accompanied by Spanish scientists at CERN, also visited the LHC superconducting magnet test hall (photo). From left to right: Felix Rodriguez Mateos of CERN LHC Division, Josep Piqué i Camps, Spanish Minister of Science and Technology, César Dopazo, Director-General of CIEMAT (Spanish Research Centre for Energy, Environment and Technology), Juan Antonio Rubio, ETT Division Leader at CERN, Manuel Aguilar-Benitez, Spanish Delegate to Council, Manuel Delfino, IT Division Leader at CERN, and Gonzalo León, Secretary-General of Scientific Policy to the Minister.

  5. Correction

    Directory of Open Access Journals (Sweden)

    2012-01-01

    Full Text Available Regarding Gorelik, G., & Shackelford, T.K. (2011. Human sexual conflict from molecules to culture. Evolutionary Psychology, 9, 564–587: The authors wish to correct an omission in citation to the existing literature. In the final paragraph on p. 570, we neglected to cite Burch and Gallup (2006 [Burch, R. L., & Gallup, G. G., Jr. (2006. The psychobiology of human semen. In S. M. Platek & T. K. Shackelford (Eds., Female infidelity and paternal uncertainty (pp. 141–172. New York: Cambridge University Press.]. Burch and Gallup (2006 reviewed the relevant literature on FSH and LH discussed in this paragraph, and should have been cited accordingly. In addition, Burch and Gallup (2006 should have been cited as the originators of the hypothesis regarding the role of FSH and LH in the semen of rapists. The authors apologize for this oversight.

  6. Correction

    Directory of Open Access Journals (Sweden)

    2014-01-01

    Full Text Available Regarding Tagler, M. J., and Jeffers, H. M. (2013. Sex differences in attitudes toward partner infidelity. Evolutionary Psychology, 11, 821–832: The authors wish to correct values in the originally published manuscript. Specifically, incorrect 95% confidence intervals around the Cohen's d values were reported on page 826 of the manuscript where we reported the within-sex simple effects for the significant Participant Sex × Infidelity Type interaction (first paragraph, and for attitudes toward partner infidelity (second paragraph. Corrected values are presented in bold below. The authors would like to thank Dr. Bernard Beins at Ithaca College for bringing these errors to our attention. Men rated sexual infidelity significantly more distressing (M = 4.69, SD = 0.74 than they rated emotional infidelity (M = 4.32, SD = 0.92, F(1, 322 = 23.96, p < .001, d = 0.44, 95% CI [0.23, 0.65], but there was little difference between women's ratings of sexual (M = 4.80, SD = 0.48 and emotional infidelity (M = 4.76, SD = 0.57, F(1, 322 = 0.48, p = .29, d = 0.08, 95% CI [−0.10, 0.26]. As expected, men rated sexual infidelity (M = 1.44, SD = 0.70 more negatively than they rated emotional infidelity (M = 2.66, SD = 1.37, F(1, 322 = 120.00, p < .001, d = 1.12, 95% CI [0.85, 1.39]. Although women also rated sexual infidelity (M = 1.40, SD = 0.62 more negatively than they rated emotional infidelity (M = 2.09, SD = 1.10, this difference was not as large and thus in the evolutionary theory supportive direction, F(1, 322 = 72.03, p < .001, d = 0.77, 95% CI [0.60, 0.94].

  7. Corrective Bracing for Severe Idiopathic Scoliosis in Adolescence: Influence of Brace on Trunk Morphology

    Directory of Open Access Journals (Sweden)

    Edyta Kinel

    2012-01-01

    Full Text Available Aim. The aim of the work was to study whether wearing a corrective brace by adolescent girls with severe idiopathic scoliosis can influence external shape of the trunk. Methods. Comparison of clinical deformity of two groups of girls matched for age and Cobb angle: group (1 of 23 girls, aged 14.9±1.3 years, Cobb angle 55.0°±6.8°, who refused surgical treatment and have been wearing Chêneau brace for more than 6 months, compared with group (2 of 22 girls, aged 14.1±1.8 years, Cobb angle 59.7°±14.6° never treated with corrective bracing. Clinical deformity was assessed with the Bunnell scoliometer (angle of trunk rotation ATR and surface topography (posterior trunk symmetry index POTSI and Hump Sum HS. Results. The ATR in the primary curvature was 11.9°±3.4° (5°–18° in group 1 versus 15.1°±5.6° (6°–25° in group 2 (P=0.027. The HS was 16.8°±3.8 versus 19.2°±4.6, respectively, P=0.07. The POTSI value did not differ between groups. Conclusion. Girls with Cobb angle above 45 degrees, who have been subjected to brace treatment, revealed smaller clinical deformity of their back comparing to nontreated girls having similar radiological curvatures.

  8. Correction.

    Science.gov (United States)

    2015-10-01

    In the article by Quintavalle et al (Quintavalle C, Anselmi CV, De Micco F, Roscigno G, Visconti G, Golia B, Focaccio A, Ricciardelli B, Perna E, Papa L, Donnarumma E, Condorelli G, Briguori C. Neutrophil gelatinase–associated lipocalin and contrast-induced acute kidney injury. Circ Cardiovasc Interv. 2015;8:e002673. DOI: 10.1161/CIRCINTERVENTIONS.115.002673.), which published online September 2, 2015, and appears in the September 2015 issue of the journal, a correction was needed. On page 1, the institutional affiliation for Elvira Donnarumma, PhD, “SDN Foundation,” has been changed to read, “IRCCS SDN, Naples, Italy.” The institutional affiliation for Laura Papa, PhD, “Institute for Endocrinology and Experimental Oncology, National Research Council, Naples, Italy,” has been changed to read, “Institute of Genetics and Biomedical Research, Milan Unit, Milan, Italy” and “Humanitas Research Hospital, Rozzano, Italy.” The authors regret this error.

  9. Brachial plexus palsy caused by halo traction before posterior correction in patients with severe scoliosis

    Institute of Scientific and Technical Information of China (English)

    QIAN Bang-ping; QIU Yong; WANG Bin; YU Yang; ZHU Ze-zhang

    2007-01-01

    Objective: To explore the clinical features and treatment results of brachial plexus palsy caused by halo traction before posterior correction in patients with severe scoliosis.Methods: A total of 300 cases of severe scoliosis received halo traction before posterior correction in our department from July 1997 to November 2004. Among them, 7 cases were complicated with brachial plexus palsy.The average Cobb angle was 110° (range, 90°-135°).Diagnoses were made as idiopathic scoliosis in 1 case,congenital scoliosis in 3 cases, and neuromuscular scoliosis in 3 cases. Additionally, diastematomyelia and tethered cord syndrome were found in 3 cases and thoracolumbar kyphosis in 2 cases. Weight of traction was immediately reduced when the patient developed any abnormal neurological symptoms in the upper extremity, and rehabilitation training was undertaken. Simultaneously,neurotrophic pharmacotherapy was applied, and the neurological function restoration of the upper limbs and the recovery time were documented.Results: Traction was used for an average of 3.5 weeks (range, 2-6 weeks) before spinal fusion for these 7 patients. The average traction weight was 8 kg, which was 19% on average (range, 13%-26%) of the average body weight (40.2 kg). These 7 patients had long and thin body configuration with a mean height of 175 cm. The duration between symptoms of brachial plexus paralysis and the diagnosis was 1-3 hours. All of these 7 patients presented various degrees of numbness in the ulnar side of the hand and forearm. Median nerve paresis was found in 3 cases and ulnar nerve paresis in 4 cases. Complete recovery of the neurological function had been achieved by the end of three months.Conclusions: The clinical features of brachial plexus palsy caused by halo traction include median nerve paresis,ulnar nerve paralysis, and numbness in the ulnar side of the hand and forearm, which may be due to the injury of the inferior part of the brachial plexus, i.e. , damage of Cs and

  10. Poisoning severity score, Glasgow coma scale, corrected QT interval in acute organophosphate poisoning.

    Science.gov (United States)

    Akdur, Okhan; Durukan, Polat; Ozkan, Seda; Avsarogullari, Levent; Vardar, Alper; Kavalci, Cemil; Ikizceli, Ibrahim

    2010-05-01

    The aim of this study was to investigate effectiveness of the poisoning severity score (PSS), Glasgow coma scale (GCS), and corrected QT (QTc) interval in predicting outcomes in acute organophosphates (OP) poisoning. Over a period of 2 years, 62 patients with OP poisoning were admitted to emergency department (ED) of Erciyes University Medical School Hospital. The age, sex, cause of contact, compound involved, time elapsed between exposure and admission to the ED, duration of hospital stay, and cardiac manifestations at the time of presentation were recorded. GCS and poisoning severity score (PSS) was calculated for each patient. Electrocardiogram (ECG) analysis included the rate, rhythm, ST-T abnormalities, conduction defects, and measurement of PR and QT intervals. Sixty-two patients with OP poisoning presented to our ED from January 2007 to December 2008 from which 54 patients were included in the study. The mean age was 34.1 +/- 14.8 years. Of the cases, 53.7% were female. Twenty-six patients had a prolonged QTc interval. Mean PSS of men and women was 1.8 +/- 1.0. No statistically significant correlation was found between the PSS and QTc intervals of the cases. A significant correlation was determined between the GCS and PSS of grade 3 and grade 4 cases. GCS is a parameter that helps clinician to identify advanced grade OP poisoning patients in the initial assessment in the ED. However, ECG findings, such as prolonged QTc interval, are not effective in determination of short-term prognosis and show no relationship with PSS.

  11. Osmotic demyelination syndrome after correction of severe hyponatremia associated with pituitrin.

    Science.gov (United States)

    Xu, Dan Hua; Yuan, Min; Wang, Jian Wen; Hu, Yun Zhen

    2015-05-01

    Osmotic demyelination syndrome (ODS) may be precipitated by aggressive correction of a hypoosmolar state. We report the case of a 24-year-old woman who developed ODS during rapid correction of asymptomatic hyponatremia caused by pituitrin prescribed for hemoptysis. After hyponatremia correction by NaCl supplementation, the patient developed limb weakness, blurred vision, hand and perioral numbness, and lisp. Magnetic resonance imaging (MRI) revealed bilateral signal hyperintensity of the globus pallidus and caudate nucleus, compatible with extra-pontine ODS. These symptoms improved gradually with treatment, and brain MRI ~ 3 months later indicated substantial resolution of ODS. This case serves as a warning to physicians that hypoosmotic correction must be achieved at a controlled rate.

  12. Surgical strategy of one stage surgery of anterior release combined with posterior correction in treatment of severe scoliosis

    Institute of Scientific and Technical Information of China (English)

    LI Ming; LIU Yang; ZHU Xiao-dong; ZHAO Xin-gang; BAI Yu-shu; NI Chun-hong; SHI Zhi-cai; HOU Tie-sheng

    2005-01-01

    Objective: Severe scoliosis refers to scoliosis with serious and stiff curve. It always combins with trunk imbalance in coronal and sagittal contour. Besides complex pathological changes, cardiopulmonary deficits and other concomitant diseases increase treatmental difficulties. So the treatment of severe scoliosis is always a great challenge to spine surgeon.Methods:Thirty-six patients with severe scoliosis received one stage posterior correction followed by anterior release during July 1997 to January 2003, including 9 males and 27 females. Mean age was 17.2 years. Of them, 33 was idiopathic scoliosis and 3 was neurofibromatosis scoliosis( Cobb angle: 85-116 degree); 20 cases were abnormal in sagital plane. Three-dimensional devised instrumentation were applied such as CD, CD-Horizon, TSRH or Isola in posterior procedure followed by anterior release during the same anesthesia. 31 cases of this group received thoracic plasty.Results: The correction in the frontal plane achieved an average of 48.5%. In the sagittal plane, the pathological shape of the spine was reduced and distinctly ameliorated. 80.6% of the patients maintained or achieved balance of sagittal plane. There were no complications of severe neurological deficit, hook displacement, rod broken, and deep infection at follow-up. One case occurred traumatic pleurisy after operation and another appeared pseudarthrosis 2 years later. One case demonstrated imbalance 11 months after operation. One patient was presented loss of correction more than 10 degree at one year follow-up and 5.2 degree in average.Conclusion:The study indicates that the one stage posterior correction combined with anterior release in treatment of severe scoliosis can achieve satisfactory correction. Appropriate choice of cases, preoperational detailed assessment and application of SEP and wake-up test during operation can possibly reduce severe complication. The long-term outcomes still need further observation.

  13. Use of a TTA plate for correction of severe patella baja in a Chihuahua.

    Science.gov (United States)

    Edwards, George A; Jackson, Andrew H

    2012-01-01

    A 7 yr old spayed female Chihuahua presented for right hind limb lameness and reduced stifle range of motion. Radiographs showed a marked patella baja of the right stifle and evidence of a previous surgery to correct a medial patellar luxation. A tibial tuberosity osteotomy was performed to allow proximal translation of the tibial tuberosity, which was stabilized with a tibial tuberosity advancement plate. Four weeks postoperatively, lameness and articular range of motion were improved, and the use of anti-inflammatory and analgesic medications was discontinued. The dog was still ambulating well and had no lameness 12 mo postsurgically.

  14. Total serum calcium and corrected calcium as severity predictors in acute pancreatitis

    Directory of Open Access Journals (Sweden)

    A.A. Gutiérrez-Jiménez

    2014-01-01

    Conclusions: TC and ACC, measured within the first 24 hours, are useful severity predictors in acute pancreatitis, with sensitivity and predictive values comparable or superior to those of the conventional prognostic scales.

  15. Polarity correction factor for flattening filter free photon beams in several cylindrical ionization chambers.

    Science.gov (United States)

    Ogata, Toshiyuki; Uehara, Kazuyuki; Nakayama, Masao; Tsudou, Shinji; Masutani, Takashi; Okayama, Takanobu

    2016-07-01

    In this study, we aimed to compare the polarity correction factor in ionization chambers for flattening filter free (FFF) photon beams and flattening filter (FF) beams. Measurements were performed with both 6 and 10 MV FFF and FF beams. Five commercial ionization chambers were evaluated: PTW TN30013; IBA Dosimetry CC01, CC04, and CC13; and Exradin A12S. Except for the CC01 ionization chamber, the other four chambers showed less than a 0.3 % difference in the polarity effect between the FFF and the FF beams. The CC01 chamber showed a strong field-size-dependence, unlike the other chambers. The polarity effect for all chambers with FFF beams did not change with the dose rate. Except in the case of the CC01 chamber, the difference in the polarity effect between FFF and FF beams was not significant.

  16. Correction of aortic coarctation in a girl with severe PHACE syndrome.

    Science.gov (United States)

    Xiong, Lian; Xia, Zhenkun; Fan, Chengming; Zhang, Weizhi; Yang, Jinfu

    2014-10-14

    A 12-year-old Chinese girl was demonstrated multivessel distortion and malformation: aortic coarctation with the narrowest lumen diameter measuring of 4 mm located between the left common carotid artery and the left subclavian artery, a huge and thin-walled aneurysm is connected to the coarctation, and the descending aorta was distorted. Cerebrovascular revealed distorted arteries and a completely aberrant brain blood supply. She underwent correction of the aortic coarctation by establishing a bypass between the ascending aorta and the descending aorta using a 13-mm Gore-tex tube. Postoperative recovery was uneventful, at 6-month follow-up, the cervical vascular pulsatility was relieved and she is in good condition.

  17. A patient presenting with metabolic acidosis despite severe vomiting--correct diagnosis by use of the physical-chemical approach.

    Science.gov (United States)

    Lindner, Gregor; Pfortmüller, Carmen; Exadaktylos, Aristomenis K

    2013-06-01

    We describe the case of a 28-year-old otherwise healthy woman who presents to our emergency department with nausea for 2 days and severe vomiting for 1 day. She has no history of travel, and her medical history is unremarkable. The physical examination shows a soft and nontender abdomen. Laboratory examinations reveal the presence of significant metabolic alkalosis despite the severe vomiting of the patient. Hypochloremic alkalosis would be expected to be present in this patient. We explain how to correctly identify the rare cause of metabolic acidosis present in this patient using the physicochemical approach (Stewarts approach) for the analysis of human acid-base disorders.

  18. Dermal patch graft correction of severe chordee secondary to penile corporal body disproportion without urethral division in boys without hypospadias.

    Science.gov (United States)

    Zaontz, M R; Dean, G E

    2016-08-01

    Historically, significant ventral penile curvature secondary to corporal body disproportion has been corrected either by dorsal plication or division of the urethral plate. In the rare situations where there is severe chordee in the face of an intact urethra with an orthotopic meatus, division of the urethral plate is commonly performed at the time of grafting the ventral defect created by incising the tunica albuginea. Subsequently, a staged procedure is necessary to reconnect the urethra at a later date. Herein the authors present a novel technique that shows it is possible to perform successful dermal patch orthoplasty without division of the urethra in patients with a normal orthotopic meatus and urethra via urethral mobilization. Three patients over the past 3 years with severe ventral chordee, orthotopic meati and normal urethral anatomy presented for correction. Two patients were 18 years old and one was 10 years old. All three boys were circumcised. The two older boys insisted on dorsal plication as a first approach which worked only temporarily for about 6 months while the younger boy had no prior surgery performed. Each boy underwent a circumcising incision, degloving of the shaft skin, extensive urethral mobilization and dermal patch graft orthoplasty to correct chordee. All surgeries were performed in an outpatient setting. No urinary drainage was used in any patient and a simple bio-occlusive dressing was employed in each case. Follow-up ranged from 11 months to 2 years (mean 1.5 years). All three boys have strong straight erections, full well directed urinary streams and no complications noted to date. Our conclusion based on this experience is that extensive urethral mobilization can allow for correction of severe ventral chordee without urethral division in a single operative setting in boys without hypospadias and a normal urethra. The accompanying movie herein describes the surgical technique.

  19. Orthodontic correction of severely rotated maxillary central incisor in a diabetic adult

    Directory of Open Access Journals (Sweden)

    Rajesh Gyawali

    2015-12-01

    Full Text Available Background: Orthodontics has recently seen an increase in the number of adult population seeking treatment. Financial dependency, increasing awareness and availability of service can be the reasons behind this rise. Though, clinical myths regarding duration, effectiveness of treatment, associated systemic conditions still exist, these should be of no concern and with adequate monitoring and procedural modifications, conventional orthodontic treatment is possible.Case description: A 58 year old Type II diabetic male presented to orthodontic clinic with unesthetic gap between upper front teeth. The history revealed extraction of painful mesiodens. On examination, the patient had Class I molar, canine and incisor relationship. 21 was rotated with 5mm of space between central incisors. Fixed orthodontic treatment was planned after physician consultation regarding his diabetic condition. Bondable buccal tubes instead of bands were used in first molars, 0.022” Roth brackets were bonded on other maxillary teeth. The wire gradually progressed from 0.014”NiTi, 0.016”NiTi to 0.018”SS. Lingual button was attached on the labial and lingual surface of 21 to apply couple. After the correction of rotation of 21, remaining space closure with esthetic contouring of 21 was done. Maintenance of adequate oral hygiene was reinforced throughout the treatment period. Fixed lingual retainer was bonded and pericision performed to retain the achieved result.Conclusion: Orthodontic treatment can be carried out in diabetic adults with good glycemic control to achieve esthetic results; however, measures for maintenance of adequate oral hygiene should be undertaken. Interdisciplinary approach involving restorative procedures can enhance the esthetics achieved.JCMS Nepal. 2015;11(3:30-34

  20. Partial correction of a severe molecular defect in hemophilia A, because of errors during expression of the factor VIII gene

    Energy Technology Data Exchange (ETDEWEB)

    Young, M.; Antonarakis, S.E. [Univ. of Geneva (Switzerland); Inaba, Hiroshi [Tokyo Medical College (Japan)] [and others

    1997-03-01

    Although the molecular defect in patients in a Japanese family with mild to moderately severe hemophilia A was a deletion of a single nucleotide T within an A{sub 8}TA{sub 2} sequence of exon 14 of the factor VIII gene, the severity of the clinical phenotype did not correspond to that expected of a frameshift mutation. A small amount of functional factor VIII protein was detected in the patient`s plasma. Analysis of DNA and RNA molecules from normal and affected individuals and in vitro transcription/translation suggested a partial correction of the molecular defect, because of the following: (i) DNA replication/RNA transcription errors resulting in restoration of the reading frame and/or (ii) {open_quotes}ribosomal frameshifting{close_quotes} resulting in the production of normal factor VIII polypeptide and, thus, in a milder than expected hemophilia A. All of these mechanisms probably were promoted by the longer run of adenines, A{sub 10} instead of A{sub 8}TA{sub 2}, after the delT. Errors in the complex steps of gene expression therefore may partially correct a severe frameshift defect and ameliorate an expected severe phenotype. 36 refs., 6 figs.

  1. Corrected transposition of the great arteries with several associated anomalies in a 68-year-old patient

    Directory of Open Access Journals (Sweden)

    Jacob José Luiz Balthazar

    2001-01-01

    Full Text Available Few patients with corrected transposition of the great arteries survive past 50 years of age because of the association with congenital defects, development of total atrioventricular block, and right ventricular dysfunction. We report the case of a male patient with dextrocardia in situs solitus and corrected transposition of the great arteries associated with a wide atrial septal defect and severe pulmonary valvar and subvalvar stenoses. The patient also developed a large aneurysm on the pulmonary artery, total atrioventricular block diagnosed 8 years earlier, symptoms of dysfunction of the systemic ventricle in the previous 2 years, insufficiency of the left atrioventricular valve, and aortic regurgitation. Despite all these associated anomalies, the patient developed class III cardiac decompensation only at the age of 68 years, which makes this case a rarity. The patient was clinically treated, and was discharged from the hospital in good condition.

  2. Recovery and radiation corrections and time constants of several sizes of shielded and unshielded thermocouple probes for measuring gas temperature

    Science.gov (United States)

    Glawe, G. E.; Holanda, R.; Krause, L. N.

    1978-01-01

    Performance characteristics were experimentally determined for several sizes of a shielded and unshielded thermocouple probe design. The probes are of swaged construction and were made of type K wire with a stainless steel sheath and shield and MgO insulation. The wire sizes ranged from 0.03- to 1.02-mm diameter for the unshielded design and from 0.16- to 0.81-mm diameter for the shielded design. The probes were tested through a Mach number range of 0.2 to 0.9, through a temperature range of room ambient to 1420 K, and through a total-pressure range of 0.03 to 0.2.2 MPa (0.3 to 22 atm). Tables and graphs are presented to aid in selecting a particular type and size. Recovery corrections, radiation corrections, and time constants were determined.

  3. Severe Hypoxemia in Muskoxen ( Ovibos moschatus ) Immobilized with Etorphine and Xylazine Corrected with Supplemental Nasal Oxygen.

    Science.gov (United States)

    Lian, Marianne; Björck, Sven; Arnemo, Jon M; Esteruelas, Núria Fandos; Angel, Martine; Minsaas, Solveig C; Jones, Krista L; L Evans, Alina

    2017-01-04

    Twenty-three muskoxen ( Ovibos moschatus ) housed in a captive facility for rewilding in Sweden were chemically immobilized for annual health evaluations and hoof trimming. The muskoxen were darted in May to September (2012-2015) in their holding pen with etorphine (0.015 mg/kg) and xylazine (0.1 mg/kg) intramuscularly. Twenty-two of the 23 animals were immobilized with a single dart injection. The mean (SD) induction time was 4 (2) min. Arterial blood gases were collected from 18 animals. All animals were severely hypoxemic with varying degrees of respiratory acidosis. The hypoxemia resolved in 17 of 18 animals with intranasal oxygen supplementation at 1 L/min per 100 kg. Relative arterial oxygen saturation (SpO2) measured by pulse oximetry was significantly higher than the arterial oxygen saturation calculated from the partial pressure of arterial oxygen (SaO2) obtained by a blood gas analyzer. Based on these findings, muskox can be immobilized successfully with etorphine (0.015 mg/kg) and xylazine (0.1 mg/kg) but should receive supplemental oxygen.

  4. Open wedge metatarsal osteotomy versus crescentic osteotomy to correct severe hallux valgus deformity - A prospective comparative study.

    Science.gov (United States)

    Wester, Jens Ulrik; Hamborg-Petersen, Ellen; Herold, Niels; Hansen, Palle Bo; Froekjaer, Johnny

    2016-03-01

    Different techniques of proximal osteotomies have been introduced to correct severe hallux valgus. The open wedge osteotomy is a newly introduced method for proximal osteotomy. The aim of this prospective randomized study was to compare the radiological and clinical results after operation for severe hallux valgus, comparing the open wedge osteotomy to the crescentic osteotomy which is our traditional treatment. Forty-five patients with severe hallux valgus (hallux valgus angle >35̊, and intermetatarsal angle >15̊) were included in this study. The treatment was proximal open wedge osteotomy and fixation with plate (Hemax), group 1, or operation with proximal crescentic osteotomy and fixation with a 3mm cannulated screw, group 2. The mean age was 52 years (19-71). Forty-one females and four males were included. Clinical and radiological follow-ups were performed 4 and 12 months after the operation. In group 1 the hallux valgus angle decreased from 39.0̊ to 24.1̊ after 4 months and 27.9̊ after 12 months. In group 2 the angle decreased from 38.3̊ to 21.4̊ after 4 months and 27.0̊ after 12 months. The intermetatarsal angle in group 1 was 19.0̊ preoperatively, 11.6̊ after 4 months and 12.6̊ after 12 months. In group 2 the mean intermetatarsal angle was 18.9̊ preoperatively, 12.0̊ after 4 months and 12.6̊ after 12 months. The AOFAS score improved from 59.3 to 81.5 in group 1 and from 61.8 to 84.8 in group 2 respectively measured 12 months postoperatively. The relative length of the 1 metatarsal compared to 2 metatarsal bone was 0.88 and 0.87 preoperatively and 0.88 and 0.86 for group 1 and 2 respectively measured after 12 months. Crescentic osteotomy and open wedge osteotomy improve AOFAS score and VAS scores on patients operated with severe hallux valgus. No significant difference was found in the two groups looking at the postoperative improvement of HVA and IMA measured 4 and 12 months postoperatively. The postoperative VAS score and AOFAS score were

  5. Correction of a skeletal Class II malocclusion with severe crowding by a specially designed rapid maxillary expander.

    Science.gov (United States)

    Wang, Honghong; Feng, Jing; Lu, Peijun; Shen, Gang

    2015-02-01

    To correct an Angle Class II malocclusion or to create spaces in the maxillary arch by nonextraction treatment, distal movement of the maxillary molars is required. Various modalities for distalizing the buccal segment have been reported. Conventional extraoral appliances can be used to obtain maximum anchorage. However, many patients reject headgear wear because of social and esthetic concerns, and the success of this treatment depends on patient compliance. Intraoral appliances, such as repelling magnets, nickel-titanium coils, pendulum appliance, Jones jig appliance, distal jet appliance, and modified Nance appliance, have been introduced to distalize the molars with little or no patient cooperation. However, intraoral appliances can result in anchorage loss of the anterior teeth and distal tipping of the maxillary molars. In this case report, we introduce a diversified rapid maxillary expansion appliance that was custom designed and fabricated for the treatment of a growing girl with a skeletal Class II malocclusion and severe crowding from a totally lingually positioned lateral incisor. The appliance concomitantly expanded the maxilla transversely and retracted the buccal segment sagittally, distalizing the maxillary molars to reach a Class I relationship and creating the spaces to displace the malpositioned lateral incisor. The uniqueness of this special diversified rapid maxillary expansion appliance was highlighted by a series of reconstructions and modifications at different stages of the treatment to reinforce the anchorage.

  6. Equivalent correction in scarf and chevron osteotomy in moderate and severe hallux valgus: a randomized controlled trial.

    NARCIS (Netherlands)

    Deenik, A.; Mameren, H van; Visser, E. de; Waal Malefijt, M.C. de; Draijer, F.; Bie, R. de

    2008-01-01

    BACKGROUND: Chevron osteotomy is a widely accepted osteotomy for correction of hallux valgus.(18) Algorithms were developed to overcome the limitations of distal osteotomies. Scarf osteotomy has become popular as a versatile procedure that should be able to correct most cases of acquired hallux valg

  7. Use of the modified Stainsby procedure in correcting severe claw toe deformity in the rheumatoid foot: a retrospective review.

    LENUS (Irish Health Repository)

    Queally, Joseph M

    2009-06-01

    In claw toe deformity, the plantar plate of the metarsophalangeal joint becomes displaced onto the dorsal aspect of the metatarsal head. The Stainsby procedure replaces the displaced plantar plate to its correct position beneath the metatarsal head.

  8. Prevention of neurological complications in correction of severe spinal deformity%重视重度脊柱畸形矫形中的神经并发症

    Institute of Scientific and Technical Information of China (English)

    邱勇

    2014-01-01

    Spinal or neurological deifcit is one of the most severe complications in surgical correction of scoliosis, which may lead to catastrophic results. The neurological complications related to correction surgery for scoliosis, especially severe scoliosis, are now becoming the focus of spine surgeons. Since the differences exist in patient distribution, etiology and surgical procedures, the rate of neurological complications reported in previous literatures differs. The etiology of scoliosis has been proven to be a related factor for neurological complications in correction of severe scoliosis, and the patients with non-idiopathic scoliosis would take more risks than idiopathic scoliosis patients. Osteotomy, particularly 3-column osteotomy, is another risk factor for neurological complications. Due to complicated procedures in ocrrection of scoliosis, great attetion should paid to the operation plan. Meanwhile, prevention of neurological complications should be focused on and intra-operative neuro-monitoring is a necessity for any scoliosis surgery.

  9. CURRENT DEVELOPMENT OF CORRECTION OF SEVERE AND RIGID SCOLIOSIS%重度僵硬性脊柱侧凸矫正技术进展

    Institute of Scientific and Technical Information of China (English)

    周春光; 宋跃明

    2012-01-01

    Objective To summarize the current development of the correction of severe and rigid scoliosis. Methods Recent literature concerning the correction of severe and rigid scoliosis at home and abroad was extensively reviewed, and current developments of the correction of severe and rigid scoliosis were summarized. Results The correction of severe and rigid scoliosis shows developments as follows: the application of Halo-gravity traction increase and Halo-femoral traction is applied in posterior correction surgery. Fixation and correction technique with all pedicle screws was gradually popularized. The applications of posterior vertebral column resection, one-stage anterior and posterior surgery, and posterior-only correction surgery increase. Conclusion The developments of all kinds of correction techniques improve the correction effects of severe and rigid scoliosis. Now there is no standardized treatment protocol for severe and rigid scoliosis. Greater development can be expected in the future.%目的 对重度僵硬性脊柱侧凸矫正技术的进展进行综述. 方法 查阅近年来国内外重度僵硬性脊柱侧凸的相关文献,总结重度僵硬性脊柱侧凸矫正技术的最新进展. 结果 重度僵硬性脊柱侧凸矫正技术有如下进展:Halo-重力牵引应用增多;尝试了后路矫形术中应用Halo-股骨髁上牵引;全椎弓根螺钉固定矫形技术逐步得到推广;经后路全脊椎切除技术、一期前后路手术及单纯后路矫形手术应用增多. 结论 各种矫形技术的进展显著提高了重度僵硬性脊柱侧凸的矫形效果,但目前尚无标准化治疗方案,未来可期待更显著的进展.

  10. TH-C-BRD-06: A Novel MRI Based CT Artifact Correction Method for Improving Proton Range Calculation in the Presence of Severe CT Artifacts

    Energy Technology Data Exchange (ETDEWEB)

    Park, P; Schreibmann, E; Fox, T; Roper, J; Elder, E; Tejani, M; Crocker, I; Curran, W; Dhabaan, A [Department of Radiation Oncology and Winship Cancer Institute, Emory University, Atlanta, GA (United States)

    2014-06-15

    Purpose: Severe CT artifacts can impair our ability to accurately calculate proton range thereby resulting in a clinically unacceptable treatment plan. In this work, we investigated a novel CT artifact correction method based on a coregistered MRI and investigated its ability to estimate CT HU and proton range in the presence of severe CT artifacts. Methods: The proposed method corrects corrupted CT data using a coregistered MRI to guide the mapping of CT values from a nearby artifact-free region. First patient MRI and CT images were registered using 3D deformable image registration software based on B-spline and mutual information. The CT slice with severe artifacts was selected as well as a nearby slice free of artifacts (e.g. 1cm away from the artifact). The two sets of paired MRI and CT images at different slice locations were further registered by applying 2D deformable image registration. Based on the artifact free paired MRI and CT images, a comprehensive geospatial analysis was performed to predict the correct CT HU of the CT image with severe artifact. For a proof of concept, a known artifact was introduced that changed the ground truth CT HU value up to 30% and up to 5cm error in proton range. The ability of the proposed method to recover the ground truth was quantified using a selected head and neck case. Results: A significant improvement in image quality was observed visually. Our proof of concept study showed that 90% of area that had 30% errors in CT HU was corrected to 3% of its ground truth value. Furthermore, the maximum proton range error up to 5cm was reduced to 4mm error. Conclusion: MRI based CT artifact correction method can improve CT image quality and proton range calculation for patients with severe CT artifacts.

  11. Correction of severe spinopelvic mismatch: decreased blood loss with lateral hyperlordotic interbody grafts as compared with pedicle subtraction osteotomy.

    Science.gov (United States)

    Leveque, Jean-Christophe; Yanamadala, Vijay; Buchlak, Quinlan D; Sethi, Rajiv K

    2017-08-01

    OBJECTIVE Pedicle subtraction osteotomy (PSO) provides extensive correction in patients with fixed sagittal plane imbalance but is associated with high estimated blood loss (EBL). Anterior column realignment (ACR) with lateral graft placement and sectioning of the anterior longitudinal ligament allows restoration of lumbar lordosis (LL). The authors compare peri- and postoperative measures in 2 groups of patients undergoing correction of a sagittal plane imbalance, either through PSO or the use of lateral lumbar fusion and ACR with hyperlordotic (20°-30°) interbody cages, with stabilization through standard posterior instrumentation in all cases. METHODS The authors performed a retrospective chart review of cases involving a lumbar PSO or lateral lumbar interbody fusion and ACR (LLIF-ACR) between 2010 and 2015 at the authors' institution. Patients who had a PSO in the setting of a preexisting fusion that spanned more than 4 levels were excluded. Demographic characteristics, spinopelvic parameters, EBL, operative time, and LOS were analyzed and compared between patients treated with PSO and those treated with LLIF-ACR. RESULTS The PSO group included 14 patients and the LLIF-ACR group included 13 patients. The mean follow-up was 13 months in the LLIF-ACR group and 26 months in the PSO group. The mean EBL was significantly lower in the LLIF-ACR group, measuring approximately 50% of the mean EBL in the PSO group (1466 vs 2910 ml, p 0.05), as was the preoperative PI-LL mismatch (33° in each group, p > 0.05) and the postoperative PI-LL mismatch ( 0.5). The total operative time and LOS were not significantly different in the 2 groups. CONCLUSIONS This is the first direct comparison of the LLIF-ACR technique with the PSO in adult spinal deformity correction. The study demonstrates that the LLIF-ACR provides equivalent deformity correction with significantly reduced blood loss in patients with a previously unfused spine compared with the PSO. This technique provides a

  12. Determination of several trace elements in silicate rocks by an XRF method with background and matrix corrections

    Energy Technology Data Exchange (ETDEWEB)

    Pascual, J.

    1987-12-01

    An X-ray fluorescence method for determining trace elements in silicate rock samples was studied. The procedure focused on the application of the pertinent matrix corrections. Either the Compton peak or the reciprocal of the mass absorption coefficient of the sample was used as internal standard for this purpose. X-ray tubes with W or Cr anodes were employed, and the W L..beta.. and Cr K..cap alpha.. Compton intensities scattered by the sample were measured. The mass absorption coefficients at both sides of the absorption edge for Fe (1.658 and 1.936 A) were calculated. The elements Zr, Y, Rb, Zn, Ni, Cr and V were determined in 15 international reference rocks covering wide ranges of concentration. Relative mean errors were in many cases less than 10%.

  13. Correction of severe class II skeletal discrepancy with fixed twin block and high pull headgear--a case report.

    Science.gov (United States)

    Patel, Dolly; Parekh, Harshik; Gupta, Bhaskar; Purl, Taruna

    2014-01-01

    This case report describes the management of a girl with a severe Class II skeletal discrepancy, Class II molar and canine relationship, a large overjet, an impinging overbite and a steep mandibular plane angle. Seemingly a surgical case, but as the patient was in CVMI stage 4, the treatment was initiated with a fixed twin block extending up to the maxillary second molars along with high pull headgear for the vertical control. This promoted the growth of the mandible, restrained maxilla in anteroposterior and vertical directions, combined with the fixed appliances for the aligning and levelling of the dentition improved the soft tissue profile. Thus severe skeletal Class II discrepancy with noncompensatory dental occlusion was successfully managed non-surgically with the combination of dentofacial orthopaedics along with comprehensive orthodontic mechanism without any extraction resulting in acceptable soft tissue changes.

  14. Surgical Versus Orthodontic Correction for Class II Patients: Age and Severity in Treatment Planning and Treatment Outcome

    Science.gov (United States)

    Camilla Tulloch, J. F.; Lenz, Brent E.; Phillips, Ceib

    2013-01-01

    Treatment options for Class II malocclusion include orthognathic surgery. Treatment choices are particularly difficult for young patients because of the uncertainty regarding future growth. Surgical treatment has generally been considered necessary for older patients with more severe Class II problems. The treatment records of more than 500 patients with Class II malocclusion were reviewed. Patients were grouped according to their initial treatment plan (surgery or orthodontics) and treatment outcome (overjet [OJ] reduced to function analyses using data from the patient’s pretreatment cephalogram were used to determine whether age, in combination with malocclusion severity, could predict the choice of treatment, and whether a simple set of pretreatment variables could predict the success or failure of OJ reduction. The derived equations were tested in a similar group of growing Class II children. Although the data showed clinicians use patient’s age in determining treatment choice, age did not seem to be associated with treatment outcome. The majority of the variability that determined the success or failure of OJ reduction was not explained by patient’s age or malocclusion severity. These findings suggest other factors, including psychosocial variables, need to be explored if we are to gain a better understanding of why treatments succeed or fail. PMID:10860060

  15. Challenges in dengue fever in the elderly: atypical presentation and risk of severe dengue and hospital-acquired infection [corrected].

    Directory of Open Access Journals (Sweden)

    Emily K Rowe

    2014-04-01

    Full Text Available BACKGROUND/METHODS: To better understand dengue fever in the elderly, we compared clinical features, World Health Organization (WHO dengue classification and outcomes between adult (<60 and elderly (≥60 dengue patients. We explored the impact of co-morbidity and hospital-acquired infection (HAI on clinical outcomes in the elderly. All patients managed at the Communicable Disease Centre, Singapore, between 2005 and 2008 with positive dengue polymerase chain reaction (PCR or who fulfilled WHO 1997 or 2009 probable dengue criteria with positive dengue IgM were included. RESULTS: Of the 6989 cases, 295 (4.4% were elderly. PCR was positive in 29%. The elderly suffered more severe disease with more dengue haemorrhagic fever (DHF (29.2% vs. 21.4% and severe dengue (SD (20.3% vs. 14.6% (p<0.05. Classic dengue symptoms were more common in the adult group. The elderly were less likely to fulfill WHO 1997 (93.6% vs. 96.4% (p = 0.014, but not WHO 2009 probable dengue (75.3% vs. 71.5%. Time to dengue diagnosis was similar. There was no significant difference in the frequency of warning signs between the two groups, but the elderly were more likely to have hepatomegaly (p = 0.006 and malaise/lethargy (p = 0.033 while the adults had significantly more mucosal bleeding (p<0.001. Intensive care admission occurred in 15 and death in three, with no age difference. Notably, the elderly stayed in hospital longer (median 5 vs. 4 days, and suffered more pneumonia (3.8% vs. 0.7% and urinary infection (1.9% vs. 0.3% (p = 0.003. Predictors of excess length of stay were age (adjusted odds ratio [aOR] 2.01, 95% confidence interval [CI] 1.37-2.88, critical illness (aOR 5.13, 95%CI 2.59-9.75, HAI (aOR 12.06, 95%CI 7.39-19.9, Charlson score (aOR 6.9, 95%CI 2.02-22.56 and severe dengue (DHF/dengue shock syndrome/SD (aOR 2.24, 95%CI 1.83-2.74. CONCLUSION: Elderly dengue patients present atypically and are at higher risk of DHF, SD and HAI. Aside from dengue

  16. Correction of severe wrist deformity following physeal arrest of the distal radius with the aid of a three-dimensional computer simulation.

    Science.gov (United States)

    Murase, Tsuyoshi; Oka, Kunihiro; Moritomo, Hisao; Goto, Akira; Sugamoto, Kazuomi; Yoshikawa, Hideki

    2009-11-01

    Growth arrest following physeal injury may result in severe limb deformity. We report a case of complex wrist deformity caused by injury to the distal radial physis resulting in radial shortening and abnormal inclination of the radial articular surface, which was successfully treated by gradual correction after computer simulation. The simulation enabled us to develop an appropriate operative plan by accurately calculating the axis of the three-dimensional (3D) deformity using computer bone models. In the simulative surgery with a full-size stereolithography bone model, an Ilizarov external fixator was applied to the radius such that its two hinges were located on the virtual axis of the deformity, which was reproduced in the actual surgery. This technique of 3D computer simulation is a useful alternative to plan accurate correction of complex limb deformities following growth arrest.

  17. Laparoscopic Reconstruction in Post-Tubercular Urinary Tract Strictures: Technical Challenges.

    Science.gov (United States)

    Ghosh, Bastab; Sridhar, Kartik; Pal, Dilip Kumar

    2017-05-10

    Genitourinary tuberculosis still continues to plague developing countries and is a significant cause of morbidity as well as mortality in the developing world. At present, nearly 55% of the patients of genitourinary tuberculosis (GUTB) need surgical management. Owing to the presence of dense adhesions and loss of normal anatomical planes, GUTB was considered to be a contraindication to laparoscopic surgery. However, recent literature shows laparoscopy to be feasible in GUTB. Our study aimed at identifying the challenges in laparoscopic urinary tract reconstructive surgery in genitourinary tuberculosis-related urinary tract obstruction. The details of 6 patients who underwent different types of laparoscopic reconstructive surgery for genitourinary tuberculosis-related urinary tract obstruction from January 2014 to December 2015 were reviewed. Baseline characteristics, indications of surgery, type of surgery, operative duration, blood loss, and follow-up details were noted. All patients received antitubercular treatment before surgery as per the direct observed treatment short-course regimen followed in our country. We performed one bilateral laparoscopic pyeloplasty, one unilateral laparoscopic pyeloplasty, two laparoscopic ureteroneocystostomies, and two ureteroureterostomies. Difficulty was encountered during dissection owing to the presence of adhesions, but conversion to open surgery was not done in five cases. Dense adhesions adjacent to the common iliac vessels necessitated conversion to open surgery in one of the ureteroureterostomies. Stenting was done in all the patients. All patients had uneventful postoperative recovery. Functional imaging following stent removal showed unobstructed tracer flow, showing successful operative outcome. Our study showed that laparoscopic reconstructive surgery is feasible in genitourinary tuberculosis despite the presence of adhesions that may pose a challenge to dissection. This is in contrast to the previous studies which conclude that genitourinary tuberculosis is a relative contraindication to laparoscopic surgery.

  18. Hematopoietic stem cell gene therapy for adenosine deaminase-deficient severe combined immunodeficiency leads to long-term immunological recovery and metabolic correction.

    Science.gov (United States)

    Gaspar, H Bobby; Cooray, Samantha; Gilmour, Kimberly C; Parsley, Kathryn L; Zhang, Fang; Adams, Stuart; Bjorkegren, Emma; Bayford, Jinhua; Brown, Lucinda; Davies, E Graham; Veys, Paul; Fairbanks, Lynette; Bordon, Victoria; Petropoulou, Theoni; Petropolou, Theoni; Kinnon, Christine; Thrasher, Adrian J

    2011-08-24

    Genetic defects in the purine salvage enzyme adenosine deaminase (ADA) lead to severe combined immunodeficiency (SCID) with profound depletion of T, B, and natural killer cell lineages. Human leukocyte antigen-matched allogeneic hematopoietic stem cell transplantation (HSCT) offers a successful treatment option. However, individuals who lack a matched donor must receive mismatched transplants, which are associated with considerable morbidity and mortality. Enzyme replacement therapy (ERT) for ADA-SCID is available, but the associated suboptimal correction of immunological defects leaves patients susceptible to infection. Here, six children were treated with autologous CD34-positive hematopoietic bone marrow stem and progenitor cells transduced with a conventional gammaretroviral vector encoding the human ADA gene. All patients stopped ERT and received mild chemotherapy before infusion of gene-modified cells. All patients survived, with a median follow-up of 43 months (range, 24 to 84 months). Four of the six patients recovered immune function as a result of engraftment of gene-corrected cells. In two patients, treatment failed because of disease-specific and technical reasons: Both restarted ERT and remain well. Of the four reconstituted patients, three remained off enzyme replacement. Moreover, three of these four patients discontinued immunoglobulin replacement, and all showed effective metabolic detoxification. All patients remained free of infection, and two cleared problematic persistent cytomegalovirus infection. There were no adverse leukemic side effects. Thus, gene therapy for ADA-SCID is safe, with effective immunological and metabolic correction, and may offer a viable alternative to conventional unrelated donor HSCT.

  19. Magnetic resonance imaging depiction of tight iliotibial band in melorheostosis associated with severe external rotation deformity, limb shortening and patellar dislocation in planning surgical correction

    Energy Technology Data Exchange (ETDEWEB)

    Osgood, Greg M.; Lee, Francis Young-In [Department of Orthopaedic Surgery, College of Physicians and Surgeons of Columbia University, New York, NY (United States); Parisien, May V. [Department of Pathology, College of Physicians and Surgeons of Columbia University, New York, NY (United States); Ruzal-Shapiro, Carrie [Department of Radiology, Babies and Children' s Hospital of New York, NY (United States)

    2002-01-01

    We present the case of a 14-year-old male with melorhesotosis and severe iliotibial band tightness which was associated with femoral shortening, severe external rotational deformity of the femur, genu valgum and patellar dislocation in the right lower extremity. Skeletal survey revealed irregular radiodense streaks involving the pelvis, femoral head, femoral shaft, distal femoral epiphysis, talus and middle phalangeal bones of the foot. Magnetic resonance (MR) imaging showed thickening of the iliotibial band in addition to low MR signal changes in the bone. Intraoperatively fibrosis in the subcutaneous layer and a thickened iliotibial band were found. MR images were very useful in understanding the soft tissue pathoanatomy in melorheostosis and planning surgical correction. (orig.)

  20. Strong halo-femoral traction with wide posterior spinal release and three dimensional spinal correction for the treatment of severe adolescent idiopathic scoliosis

    Institute of Scientific and Technical Information of China (English)

    ZHANG Hong-qi; YIN Xin-hua; LI Feng; GAO Qi-le; GE Lei; WU Jian-huang; LIU Jin-yang; GUO Chao-feng; LIU Shao-hua; LU Shi-jin; LI Jin-song

    2012-01-01

    Background Many investigators advocate anterior release combined with halo-femoral traction and posterior fusion when treating stiff thoracic curves in patient with adolescent idiopathic scoliosis (AIS).But the anterior operations often induce severe complications.Some surgeons choose posterior-only surgery with halo-femoral traction,posterior wide release and correction.But to the best of our knowledge,there are only rare prospective studies on these posterior-only surgeries for AIS patients who have a rigid curve more than 80° and flexibility less than 35%.@@Methods Sixty-four AIS patients were recruited from September 2006 to June 2009.All patients had rigid curves and underwent spinal correction.They were randomly divided into group A (combined anteroposterior surgery) and group B (posterior-only surgery).Images and scoliosis research society-22 questionnaire (SRS-22) scores were performed praand post-operation and during follow-up visits.The operation time,blood loss,hospital days,and hospital charges were compared between the two groups.@@Results These patients were followed for an average of 37.5 months (range,24-65 months).No serious complications were observed.There were no significant differences between the two groups in gender,age,preoperative radiographic data,or preoperative SRS-22 score.The average operation time,blood loss,hospital days and hospital charges in group B were less than those in group A.The SRS-22 score in group B was better than in group A at post-operation and at final follow-up.@@Conclusions In AIS with a rigid curve more than 80° and flexibility less than 35%,strong halo-femoral traction with wide posterior spinal release and three dimensional spinal correction can provide better SRS-22 scores,comparable curve correction,shorter operation time,less blood loss,shorter hospital stays and lower charges when compared to combined anterior and posterior surgery.

  1. Correction of Murine Rag2 Severe Combined Immunodeficiency by Lentiviral Gene Therapy Using a Codon-optimized RAG2 Therapeutic Transgene

    Science.gov (United States)

    van Til, Niek P; de Boer, Helen; Mashamba, Nomusa; Wabik, Agnieszka; Huston, Marshall; Visser, Trudi P; Fontana, Elena; Poliani, Pietro Luigi; Cassani, Barbara; Zhang, Fang; Thrasher, Adrian J; Villa, Anna; Wagemaker, Gerard

    2012-01-01

    Recombination activating gene 2 (RAG2) deficiency results in severe combined immunodeficiency (SCID) with complete lack of T and B lymphocytes. Initial gammaretroviral gene therapy trials for other types of SCID proved effective, but also revealed the necessity of safe vector design. We report the development of lentiviral vectors with the spleen focus forming virus (SF) promoter driving codon-optimized human RAG2 (RAG2co), which improved phenotype amelioration compared to native RAG2 in Rag2−/− mice. With the RAG2co therapeutic transgene, T-cell receptor (TCR) and immunoglobulin repertoire, T-cell mitogen responses, plasma immunoglobulin levels and T-cell dependent and independent specific antibody responses were restored. However, the thymus double positive T-cell population remained subnormal, possibly due to the SF virus derived element being sensitive to methylation/silencing in the thymus, which was prevented by replacing the SF promoter by the previously reported silencing resistant element (ubiquitous chromatin opening element (UCOE)), and also improved B-cell reconstitution to eventually near normal levels. Weak cellular promoters were effective in T-cell reconstitution, but deficient in B-cell reconstitution. We conclude that immune functions are corrected in Rag2−/− mice by genetic modification of stem cells using the UCOE driven codon-optimized RAG2, providing a valid optional vector for clinical implementation. PMID:22692499

  2. Koreksi dimensi vertikal oklusal dengan modifikasi restorasi mahkota logam pada kasus severe early childhood caries (Correcting occlusal vertical dimension using modified stainless steel crown restoration in severe early childhood caries case

    Directory of Open Access Journals (Sweden)

    Amrita Widyagarini

    2014-06-01

    Full Text Available Background: Severe early childhood caries (SECC describes progressively dental caries in primary dentition among children aged less than 3 to 5-year-old. Loss of Occlusal Vertical Dimension (OVD with deep bite in clinical feature found 2.5 times more often in s-ecc children than others. It leads discrepancies of vertical development of permanent dentition, hence creates malocclusion. Purpose: The aim of this paper was to report consideration and correction of OVD in SECC child. Case: A 5-year-old girl was accompanied by her mother came to pediatric dental clinic Faculty of Dentistry Universitas Indonesia. Patient’s chief complaint was decay on all her teeth. Clinical examination revealed caries on all primary dentition, tooth #16, #46 have not yet been occluded, 26 erupted partially and it occluded with 36, anterior deep bite. Diagnose was anterior deep bite caused by SECC. Case management: Operative-rehabilitative treatment restores OVD to prevent malocclusion by modifying height of ssc in primary molars. Correcting deep bite using stainless steel crown (SSC modified in posterior was done. First, restoration with glass-ionomer cement for raising the bite followed by a week evaluation to observe masticatory function and functional analysis of temporomandibular joint. Second, ssc were placed in primary molars. Conclusion: Modifying height of ssc in primary molars could corrected OVD in SECC child. Permanent first molars eruption could be guided to completely occlusion and prevent early malocclusion.Latar belakang: Severe early childhood caries (SECC menunjukan pola karies gigi sulung yang progresif dan menyeluruh pada anak usia di bawah 3 hingga 5 tahun. Kehilangan dimensi vertikal oklusal (DVO, dengan gambaran gigitan dalam pada periode gigi sulung dilaporkan terjadi 2,5 kali lebih banyak pada anak SECC. Hal ini dapat menyebabkan gangguan perkembangan vertikal gigi permanen yang nantinya menyebabkan maloklusi. Tujuan: Laporan kasus ini

  3. Check ligament suspension for correction of congenital severe blepharoptosis%翼状韧带悬吊矫正先天性重度上睑下垂

    Institute of Scientific and Technical Information of China (English)

    潘贰; 张毓; 李琳; 沈绍勇; 王向阳; 王洪勇; 郝永生

    2011-01-01

    Objective To evaluate the clinical result of check ligament suspension for correction of congenital severe blepharoptosis. Methods Since Jan. 2010 to Nov. 2010, 15 eyes in 15 cases with congenital severe blepharoptosis were treated with the check ligament suspension. Palpebralis aponeurosis was exposured by opening fascia palpebralis during blepharoplasty. Palpebralis aponeurosis was cut off about 5 mm above the tarsus. The check ligament was seen in the intermuscular space between the segment of levator and the anterior one third of superior rectus attached to the conjunctival fornix. Congenital blepharoptosis could be corrected by suturing the check ligament and levator palpebrae superior to the upper margin of tarsal plate with 3-0 silk thread. Double eyelid plasty was carried out in the end. Results The follow-up period was 3-11 months with good cosmetic result. All the cases could close their eyes in 15 to 30 days with no complication. Conclusions In conclusion, this technique is quite successful in raising the level of the upper eyelid in severe congenital blepharoptosis. The check ligament moves in a similar direction as the natural movement of levator muscle, so both the postoperative static and dynamic appearance of the upper lid is more natural.%目的 探讨翼状韧带悬吊矫正重度先天性上睑下垂的临床效果.方法 2010年1~11月,应用翼状韧带悬吊法治疗先天性重度上睑下垂患者15例15只眼,按照切开重睑术术式,打开眶隔,在距睑板上缘5 mm处剪断上睑提肌腱膜进入到上睑提肌下层,向结膜上穹窿分离,在上直肌前1/3和上睑提肌之间找到翼状韧带,用3-0丝线同上睑提肌缝合于睑板上缘,悬吊矫正上睑下垂,缝合形成重睑.结果 经过3~11个月随访,15只眼矫正良好,眼裂均在15~30 d基本闭合,无其他并发症发生,重睑弧度形态自然,外观满意.结论 翼状韧带悬吊治疗重度先天性上睑下垂疗效可靠,用翼状韧带代替

  4. Postoperative consumption of opioid analgesics following correction of pectus excavatum is influenced by pectus severity: a single-centre study of 236 patients undergoing minimally invasive correction of pectus excavatum

    DEFF Research Database (Denmark)

    Grosen, Kasper; Pfeiffer-Jensen, Mogens; Pilegaard, Hans

    2009-01-01

    regression analysis explained approximately 30% of the variation in daily morphine consumption (R-squared=0.2957). There was a significant positive linear relationship between pectus severity and the daily consumption of morphine. Thus, postoperative consumption of morphine increased by 6% (95% confidence...... on the postoperative consumption of opioid analgesics following this procedure to optimise pain management. Methods: A retrospective study was conducted on 236 consecutive patients undergoing minimally invasive repair of PE from 2005 to 2008. The collected data included depth of preoperative pectus excavation, patient...... demographics, peri- and postoperative information, including data on pain management. The consumption of opioid analgesics was registered after discontinuation of epidural analgesia and other types of opioid analgesics used during the study period were converted to morphine equivalents. Multiple linear...

  5. Correction of murine rag2 severe combined immunodeficiency by lentiviral gene therapy using a codon-optimized RAG2 therapeutic transgene

    NARCIS (Netherlands)

    N.P. van Til (Niek); H. de Boer (Helen); N. Mashamba (Nomusa); A. Wabik (Agnieszka); M.W. Huston (Marshall W.); T.P. Visser (Trudi); R.J. Fontana (Robert); P.L. Poliani (Pietro); B. Cassani (Barbara); F. Zhang (Fang); A.J. Thrasher (Adrian); A. Anna (Villa); G. Wagemaker (Gerard)

    2012-01-01

    textabstractRecombination activating gene 2 (RAG2) deficiency results in severe combined immunodeficiency (SCID) with complete lack of T and B lymphocytes. Initial gammaretroviral gene therapy trials for other types of SCID proved effective, but also revealed the necessity of safe vector design. We

  6. The Difficulties in Determining Time of the Operation in the Total Corrected Transposition of the Great Arteries with Severe Left AV Valve Regurgitation: Case Report

    Directory of Open Access Journals (Sweden)

    Erden İ et al.

    2010-03-01

    Full Text Available Congenitally corrected transposition of the great arteries (L-TGA is characterized by discordance between the atria and ventricles, as well as between the ventricles and the great arteries. As a result, the morphologic right ventricle lies to the left of the morphologic left ventricle and becomes the systemic ventricle. The morphologic right ventricle gives rise to the aorta, which is anterior of the pulmonary artery. As a result of discordance at both the atrioventricular (AV and the great vessel level, physiologic blood flow remains normal. It was shown that the decreased RV functions are related with increased mortality rates in long term follow up. Most of these patients have RV failure due to abnormal pressure load of systemic RV, imbalance between O2 supply and myocardial demand and development of systemic AV valvular regurgitation in most of the patients. Therefore, the most important and difficult point in the follow up of these patients is evaluation of RV functions and degree of systemic AV valve regurgitation. In this review, we discussed the difficulties in the diagnosis and treatment of these patients in the light of a typical TGA case.

  7. Less invasive corrective surgery using oblique lateral interbody fusion (OLIF) including L5-S1 fusion for severe lumbar kyphoscoliosis due to L4 compression fracture in a patient with Parkinson's disease: a case report.

    Science.gov (United States)

    Wakita, Hiromasa; Shiga, Yasuhiro; Ohtori, Seiji; Kubota, Go; Inage, Kazuhide; Sainoh, Takeshi; Sato, Jun; Fujimoto, Kazuki; Yamauchi, Kazuyo; Nakamura, Junichi; Takahashi, Kazuhisa; Toyone, Tomoaki; Aoki, Yasuchika; Inoue, Gen; Miyagi, Masayuki; Orita, Sumihisa

    2015-04-07

    Corrective surgery for kyphoscoliosis patients tend to be highly invasive due to osteotomy. The present case introduce less invasive corrective surgery using anterior oblique lateral interbody fusion (OLIF) technique. An 80-year-old Japanese man with a history of Parkinson's disease presented to our hospital because of severe kyphoscoliosis and gait disturbance. Considering the postsurgical complications due to osteotomy, we performed an anterior-posterior combined corrective fusion surgery: OLIF of Lumbar (L) 2-3, L3-4, and L4-5 (Medtronic Sofamor Danek, Memphis, TN, USA) followed by L5-Sacral (S) 1 anterior lumbar fusion via the OLIF approach using an anterior intervertebral cage, and posterior L3-4 and L4-5 facetectomy and posterior fusion using percutaneous pedicle screws from Thoracic (T) 10 to S1 with a T-9 hook system. The surgery was performed in a less invasive manner with no osteotomy, and it improved the sagittal alignments with moderate restoration, which improved the patient's posture and gait disturbance. The patient showed transient muscle weakness of proximal lower extremity contralateral side to the surgical site, which fully recovered by physical rehabilitation 3 months after the surgery. The surgical corrective procedure using the minimally invasive OLIF method including L5-S1 fusion showed a great advantage in treating degenerative kyphoscoliosis in a Parkinson's disease patient in its less-invasive approac.

  8. Correction of a severe skeletal Class II occlusion with a fixed functional appliance anchored on mini-implants: a patient report.

    Science.gov (United States)

    Gandedkar, Narayan H; Revankar, Ameet V; Ganeshkar, Sanjay V

    2010-01-01

    This report describes the treatment of a patient with a severe skeletal Angle Class II occlusion with a 14-mm overjet, crowding, and protrusion of the mandibular anterior teeth. The Class II relationship was caused mainly by a short corpus of the mandible. A fixed functional appliance was directly anchored on mini-implants, which were inserted in the mandible. A significant amount of mandibular advancement was achieved, with no protrusion of the mandibular anterior teeth. Facial esthetics improved considerably. This is the first patient report to demonstrate that mini-implants can be applied to anchor fixed functional appliances. The rationale to use mini-implants with fixed functional appliances and the potential benefits of this procedure are discussed. © 2010 BY QUINTESSENCE PUBLISHING CO, INC.

  9. The effect of a therapy protocol for increasing correction of severely contracted proximal interphalangeal joints caused by dupuytren disease and treated with collagenase injection.

    Science.gov (United States)

    Skirven, Terri M; Bachoura, Abdo; Jacoby, Sidney M; Culp, Randall W; Osterman, A Lee

    2013-04-01

    To determine the effect of a specific orthotic intervention and therapy protocol on proximal interphalangeal (PIP) joint contractures of greater than 40° caused by Dupuytren disease and treated with collagenase injections. All patients with PIP joints contracted at least 40° by Dupuytren disease were prospectively invited to participate in the study. Following standard collagenase injection and cord rupture by a hand surgeon, a certified hand therapist evaluated and treated each patient based on a defined treatment protocol that consisted of orthotic intervention to address residual PIP joint contracture. In addition, exercises were initiated emphasizing reverse blocking for PIP joint extension and distal interphalangeal joint flexion exercises with the PIP joint held in extension to lengthen a frequently shortened oblique retinacular ligament. Patients were assessed before injection, immediately after injection, and 1 and 4 weeks later. There were 22 fingers in 21 patients. The mean age at treatment was 63 years (range, 37-80 y). The mean baseline passive PIP joint contracture was 56° (range, 40° to 80°). At cord rupture, the mean PIP joint contracture became 22° (range, 0° to 55°). One week after cord rupture and therapy, the contracture decreased further to a mean of 12° (range, 0° to 36°). By 4 weeks, the mean contracture was 7° (range, 0° to 35°). The differences in PIP joint contracture were statistically significant at all time points except when comparing the means at 1 week and 4 weeks. The results represent an 88% improvement of the PIP joint contracture. In the short term, it appears that severe PIP joint contractures benefit from specific, postinjection orthotic intervention and targeted exercises. Therapeutic IV. Copyright © 2013 American Society for Surgery of the Hand. Published by Elsevier Inc. All rights reserved.

  10. Small fields output factors measurements and correction factors determination for several detectors for a CyberKnife{sup Registered-Sign} and linear accelerators equipped with microMLC and circular cones

    Energy Technology Data Exchange (ETDEWEB)

    Bassinet, C.; Huet, C.; Derreumaux, S.; Baumann, M.; Trompier, F.; Roch, P.; Clairand, I. [Institut de Radioprotection et de Surete Nucleaire (IRSN), BP17, 92262 Fontenay-aux-Roses Cedex (France); Brunet, G.; Gaudaire-Josset, S. [Institut de Cancerologie de l' Ouest Rene Gauducheau, bd Jacques Monod, 44805 Saint Herblain Cedex (France); Chea, M.; Boisserie, G. [Groupe Hospitalier Pitie-Salpetriere, 47/83 bd de l' Hopital, 75651 Paris Cedex 13 (France); Lacornerie, T. [Centre Oscar Lambret, 3, rue Frederic Combemale, BP 307, 59020 Lille Cedex (France)

    2013-07-15

    Purpose: The use of small photon fields is now an established practice in stereotactic radiosurgery and radiotherapy. However, due to a lack of lateral electron equilibrium and high dose gradients, it is difficult to accurately measure the dosimetric quantities required for the commissioning of such systems. Moreover, there is still no metrological dosimetric reference for this kind of beam today. In this context, the first objective of this work was to determine and to compare small fields output factors (OF) measured with different types of active detectors and passive dosimeters for three types of facilities: a CyberKnife{sup Registered-Sign} system, a dedicated medical linear accelerator (Novalis) equipped with m3 microMLC and circular cones, and an adaptive medical linear accelerator (Clinac 2100) equipped with an additional m3 microMLC. The second one was to determine the k{sub Q{sub c{sub l{sub i{sub n,Q{sub m{sub s{sub r}{sup f{sub c}{sub l}{sub i}{sub n},f{sub m}{sub s}{sub r}}}}}}}}} correction factors introduced in a recently proposed small field dosimetry formalism for different active detectors.Methods: Small field sizes were defined either by microMLC down to 6 Multiplication-Sign 6 mm{sup 2} or by circular cones down to 4 mm in diameter. OF measurements were performed with several commercially available active detectors dedicated to measurements in small fields (high resolution diodes: IBA SFD, Sun Nuclear EDGE, PTW 60016, PTW 60017; ionizing chambers: PTW 31014 PinPoint chamber, PTW 31018 microLion liquid chamber, and PTW 60003 natural diamond). Two types of passive dosimeters were used: LiF microcubes and EBT2 radiochromic films.Results: Significant differences between the results obtained by several dosimetric systems were observed, particularly for the smallest field size for which the difference in the measured OF reaches more than 20%. For passive dosimeters, an excellent agreement was observed (better than 2%) between EBT2 and LiF microcubes

  11. Ludloff截骨治疗中重度拇外翻的临床疗效观察%Clinical results with the Ludloff osteotomy for correction of moderate-to-severe hallux valgus

    Institute of Scientific and Technical Information of China (English)

    杨波; 李强; 鲁英; 喻飞

    2011-01-01

    Objective To observe the outcomes of Ludloff proximal first metatarsal osteotomy. Methods Twentysix patients (34 feet) with a mean age of fifty-eight years underwent a modified Ludloff proximal first metatarsal osteotomy and a distal soft-tissue procedure at our hospital for the treatment of a moderate-to-severe hallux valgus deformity. The American Orthopaedic Foot and Ankle Society score and weight-bearing radiographs of the foot were assessed preoperatively and after a mean duration of follow-up of twenty-five months. Results The mean American Orthopaedic Foot and Ankle Society score improved significantly ( P < 0. 01 ) from 52 points preoperatively to 88 points at the time of the most recent follow-up. The average hallux valgus angle improved from 31° preoperatively to 10. 3° at follow-up. The average intermetatarsal angle improved from 17° to 7. 8°. No severe complication has found. Conclusion Our intermodiateterm results demonstrate that the procedure achieves significant correction of moderate-to-severe hallux valgus deformity, significant reduction in forefoot pain, and significant improvement in functional outcome. This technique is valuable in correction of moderate to severe hallux valgus deformities.%目的 研究Ludloff截骨术对中、重度拇外翻的治疗效果.方法 2007年9月至2008年10月对26例(34足)中、重度拇外翻患者使用Ludloff截骨配合远端软组织手术进行矫形手术治疗,截骨使用螺钉固定.男4例,女22例,年龄48~67岁,平均58岁.术后采用AOFAS评分对患足进行临床功能评价,同时拍负重位足的正侧位X线片进行影像学评价,比较术后AOFAS评分及跖拇角和第一二跖间角的变化,了解患者的满意程度.结果 平均随访时间25个月(19~36个月).在最后一次随访时,31足基本无痛,3足偶有疼痛或轻微疼痛.患者对拇外翻畸形纠正满意.AOFAS评分为从术前的51分(27~65分)提高到术后的88分(72~96分),HVA从术前的31°(21

  12. The effect of image radiometric correction on the accuracy of vegetation canopy density estimate using several Landsat-8 OLI’s vegetation indices: A case study of Wonosari area, Indonesia

    Science.gov (United States)

    Dewa, R. P.; Danoedoro, P.

    2017-01-01

    Recent studies on the use of spectral indices have involved radiometric correction as a prerequisite. However, study on the effect of radiometric correction level on the accuracy of biophysical parameters’ estimate is still rare in Indonesia. This study tried to investigate the influence of various radiometric correction levels and the number of vegetation strata on the accuracy of vegetation density estimates using NDVI, MSAVI2 and GEMI of Landsat 8 OLI. In this study, the dataset covering vegetated area in Wonosari, Gunung Kidul Regency, Indonesia was processed radiometrically using eight different methods, i.e. spectral radiance, at sensor reflectance, sun elevation correction, histogram adjustments using original DN, spectal radiance, at sensor reflectance, and sun position correction respectively, as well as dark object subtraction (DOS). Every image with specific correction level was then transformed using the aforementioned indices, in order correlate with the field-measured canopy density. The analysis were carried out by considering the number of canopy layers. This found that different radiometric correction methods resulted canopy density estimates with different accuracies. The number of canopy strata also played an important role. Every vegetation index transformation performed its best accuracy by using different radiometric correction method and different number of canopy layers.

  13. 双椎体截骨术矫正强直性脊柱炎重度胸腰椎后凸畸形%Two-level pedicle subtraction osteotomy for correction of severe thoracolumbar kyphosis due to ankylosing spondylitis

    Institute of Scientific and Technical Information of China (English)

    陈志明; 杨滨; 马华松; 王晓平; 谭荣; 陈阳; 袁伟

    2014-01-01

    Objectives: To analyze the clinical results of two-level pedicle subtraction osteotomy for correc-tion of severe thoracolumbar kyphosis due to ankylosing spondylitis. Methods: From May 2009 to December 2010, 18 males with ankylosing spondylitis complicated with severe thoracolumbar kyphosis underwent two-level pedicle subtraction osteotomy, the average age at admission was 34.8 years(range, 19-47 years). Preoper-ative global kyphosis(GK) Cobb angle was 70°-108°(82.6°±17.5°) and the apex vertebra was at thoracolumbar region. Preoperative thoracic kyphosis(TK), thoracolumbar kyphosis(TLK) and lumbar lordosis(LL) angle was 46 °-67°(55.2°±15.3°), 25°-43°(32.4°±12.6°) and (-37°)-(-11°)[(-19.5°)±10.3°], respectively. Preoperative chin-brow vertical angle at standing position was 43°-130°(67.2°±21.9°). Global sagittal imbalance was determined by C7 plumb line and its relationship with the posterior superior corner of the sacrum, and the preoperative one was 11-35cm(18.3±14.8cm). Bridwell-Dewald scale was used to evaluate the clinical outcomes. Results: The aver-age operation time was 5.3±1.0h (3.7-6.9h), and the average blood loss was 1887.5±850.9ml (600-3000ml). Dura matter tearing was noted in 4 cases and skin infection in 1 case, 1 case developed transient neurologic deficits, but all healed after proper intervention. The average follow-up time was 33.5 months(24-48 months). The postoperative mean GK angle, chin-brow vertical angle, global sagittal imbalance was corrected to 21.3 °±4.2°, 9.3°±12.8° and 3.0±4.7cm, respectively. The postoperative GK, TK, TLK, LL, chin-brow vertical angle and global sagittal imbalance improved significantly compared with the preoperative data(P0.05). Instrument displacement was not noted at final follow-up. All patients could walk with normal vision. Satisfactory clinical outcomes including changes of pain, social and working status were noted at final follow-up(P0.05);X线片显示所有患者内

  14. Clinical study of Verisyse phakic iris-fixated intraocular lenses for the correction of severe myopia%有晶状体眼Verisyse虹膜夹持型人工晶状体植入矫正超高度近视

    Institute of Scientific and Technical Information of China (English)

    张素华; 曹伟芳; 赵炬伟; 余黎明; 杨坤

    2014-01-01

    Objective To evaluate the efficacy,safety,stability and predictability of the Verisyse phakic iris-fixated intraocular lens (PIOL) for the correction of severe myopia.Methods In this prospective cohort study,37 patients (65 eyes),aged from 17 to 44 years with severe myopia of-9.00--27.00 D (-18.55±4.19 D),were implanted with Verisyse phakic iris-fixated intraocular lenses from June 2005 to March 2012.Visual acuity,refraction,intraocular pressure,corneal endothelium,Verisyse IOL position,contrast sensitivity,glare sensitivity,surgical complications and poor visual symptoms were observed on 1 day,1 week,1 month,3 months,6 months,1 year,2 years,3 years,and 5 years.Then safety index and efficacy index were obtained from BSCVA and UCVA.Results The mean safety index and efficacy index were better than 1 at most times except at 1 month and 24 months.At 5 years,the mean manifest refraction was within 1 D of the attempted correction in 93% of eyes and within 0.5 D of the attempted correction in 84% of eyes.Near vision and intraocular pressure were not significantly different at 5 years.The mean loss of corneal endothelium was 3.0%±2.5% (0.07%-9.1%).The distance from the corneal endothelium to the PIOL was 2.20±0.15 mm (>2 mm) aud 0.73±0.08 mm (>0.5 mm) from the PIOL to the natural lens.There were statistically significant differences between preoperative and postoperative contrast sensitivity and glare sensitivity.Postoperative complications included 2 eyes with light inflammatory deposits on the PIOL surface,1 eye with an oval pupil and 1 patient (2 eyes) with dislocated PIOLs.More than 80% of eyes had depigmented irises at the attachment sites.Conclusion Verisvse IOL implantation for the correction of severe myopia is effective,safe,stable and predictable.It can be a supplement for corneal refractive surgery but follow-up is still required for the evaluation of long-term results.%目的 探讨有晶状体眼Verisyse虹膜夹持型人工晶状体植

  15. 第一跖骨双截骨矫正重度(足母)外翻畸形%Double wedge osteotomy of the first metatarsal for correction of severe hallux valgus

    Institute of Scientific and Technical Information of China (English)

    李昕宇; 林顺福; 王剑; 陈宇明; 王正义

    2013-01-01

    Objective To explore the curative effect of the operation of double wedge osteotomy of the first metatarsal for correction of severe hallux valgus.Methods The data of 62 patients (87 feet) with severe hallux valgus caused by enlarged distal metatarsal articular angle (DMAA) who were followed up after receiving the treatment of double wedge osteotomy of the first metatarsal from January 2008 to December 2011 were analyzed retrospectively.There are 9 males (14 feet),and 53 females (73 feet),with an average age of 56 years (range,28-70 years).Preoperative radiographs showed hallux valgus angle (HVA) was 48.6° in average,intermetatarsal angle (IMA) was 19.8° in average,and DMAA was 22.1° in avcragc.Thc opcration plan was made based on the preoperative deformity,and the osteotomy site,the angle,the capacity of osteotomy was all based on preoperative measurement.Compare the changes of HVA,IMA,DMAA before and after operation.The changes were also compared before and after the internal fixation extraction.The curative effect was observation based on American Orthopaedic Foot and Ankle Society (AOFAS) propodium score standard.Results Sixty-two patients (87 feet) were followed up for 10 to 57 months,with an average of 21 months.HVA (14.6°±1.2°),IMA (7.9°±0.7°),DMAA (7.7°±0.9°) were all satisfied 6 months after the operation.Stiff occurred in 2 patients after the operation.Cutaneous nerve injury occurred in 2 patients,and metastatic metatarsalgia occurred in 1 patient.No sever recurrence of deformity,bone nonunion and bone necrosis was found in all the patients.AOFAS score reached 91.8±1.8 one year after the operation,which was 28.4±9.1 preoperatively.Among them,49 feet were rated as excellent,31 as good,and 7 as fair.The excellent and good rate was 92% (80/87).Conclusion The first metatarsal double osteotomy can effectively correct the severe hallux valgus deformity with enlarged DMAA with few complications.It achieves good effect.Patients can bear part of

  16. Nested Quantum Error Correction Codes

    CERN Document Server

    Wang, Zhuo; Fan, Hen; Vedral, Vlatko

    2009-01-01

    The theory of quantum error correction was established more than a decade ago as the primary tool for fighting decoherence in quantum information processing. Although great progress has already been made in this field, limited methods are available in constructing new quantum error correction codes from old codes. Here we exhibit a simple and general method to construct new quantum error correction codes by nesting certain quantum codes together. The problem of finding long quantum error correction codes is reduced to that of searching several short length quantum codes with certain properties. Our method works for all length and all distance codes, and is quite efficient to construct optimal or near optimal codes. Two main known methods in constructing new codes from old codes in quantum error-correction theory, the concatenating and pasting, can be understood in the framework of nested quantum error correction codes.

  17. [Treatment of severe scoliosis].

    Science.gov (United States)

    Helenius, Ilkka; Pajulo, Olli

    2015-01-01

    Untreated severe scoliosis results in a serious malposition of the back, restrictive lung disease and increases mortality compared with the normal population. Idiopathic scoliosis rarely reaches a severe degree. In the treatment of severe scoliosis, preoperative head traction of several weeks' duration has proven a safe and effective method of correcting the malposition, and will also make scoliosis surgery technically easier. Most cases of severe scoliosis can be treated with anterior pedicle screw instrumentation, and vertebrectomy is only seldom required.

  18. 经后路全脊椎切除术治疗严重僵硬性脊柱畸形的手术策略%Surgical strategy of posterior vertebral column resection to correct severe rigid spinal deformity

    Institute of Scientific and Technical Information of China (English)

    解京明; 王迎松; 施志约; 赵智; 李韬; 张颖; 毕尼

    2015-01-01

    挑战,有赖于有效的围手术期处理、严密的手术策略及紧密协作的团队。%Background: It was considered that the surgical treatment for severe rigid spinal deformity was a restricted zone, which would face huge challenges and risks. Objective:To summarize the surgical strategy of posterior vertebral column resection (PVCR) to correct severe rigid spinal deformity in our center. Methods:A total of 105 consecutive patients undergoing PVCR for severe rigid deformity from October 2004 to December 2013 were reviewed. There were 47 males and 58 females with an average age of 18.9 years (range, 10-45 years). The flexi-bility of major curve of scoliosis was less than 10%in all patients. The major curve of scoliosis was larger than 150° in 12 patients who were treated with skull-femoral traction in supine position for 4 weeks before surgery. Demographic data, med-ical and surgical histories, perioperative and final follow-up radiographic measurements, and prevalence of perioperative complications were reviewed. Results:The mean operating time was (602±132) min and intraoperative blood loss was (4694±1794) ml. The mean major curve of scoliosis was 108.9° ± 25.5° and 36.6° ± 15.7° before and after PVCR, respectively, and the mean kyphosis was 88.8° ± 31.1° and 29.9° ± 14.1° . In the 12 patients with the curve greater than 150° , the mean major curve of scoliosis was 152.5°±14.3°, 141.8°±16.3°, 93.4°±14.0°, 47.2°±7.2° in standing position before surgery, in supine position before traction, at 4 weeks after traction in supine position and in standing position after surgery, respectively; the kyphosis was 109.3° ± 42.3°, 98.9°±40.0°, 67.3°±22.2°, and 32.2°±9.5°, respectively. The major curve of scoliosis and kyphosis after 4-week trac-tion in supine position were significantly improved when compared with before traction (P<0.05). Transient neurological complications occurred in 7 cases and nerve function recovered

  19. Brain Image Motion Correction

    DEFF Research Database (Denmark)

    Jensen, Rasmus Ramsbøl; Benjaminsen, Claus; Larsen, Rasmus

    2015-01-01

    The application of motion tracking is wide, including: industrial production lines, motion interaction in gaming, computer-aided surgery and motion correction in medical brain imaging. Several devices for motion tracking exist using a variety of different methodologies. In order to use such devices...... offset and tracking noise in medical brain imaging. The data are generated from a phantom mounted on a rotary stage and have been collected using a Siemens High Resolution Research Tomograph for positron emission tomography. During acquisition the phantom was tracked with our latest tracking prototype...

  20. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... Corrective Jaw Surgery Corrective Jaw Surgery Orthognathic surgery is performed to correct the misalignment of jaws and ... Implant Surgery Dental Implant Surgery Dental implant surgery is, of course, surgery, and is best performed by ...

  1. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... and Craniofacial Surgery Cleft Lip/Palate and Craniofacial Surgery A cleft lip may require one or more ... find out more. Corrective Jaw Surgery Corrective Jaw Surgery Orthognathic surgery is performed to correct the misalignment ...

  2. Corrective Jaw Surgery

    Science.gov (United States)

    ... and Craniofacial Surgery Cleft Lip/Palate and Craniofacial Surgery A cleft lip may require one or more ... find out more. Corrective Jaw Surgery Corrective Jaw Surgery Orthognathic surgery is performed to correct the misalignment ...

  3. A Novel Melanocortin-4 Receptor Mutation MC4R-P272L Associated with Severe Obesity Has Increased Propensity To Be Ubiquitinated in the ER in the Face of Correct Folding

    Science.gov (United States)

    Granell, Susana; Serra-Juhé, Clara; Martos-Moreno, Gabriel Á.; Díaz, Francisca; Pérez-Jurado, Luis A.; Baldini, Giulia; Argente, Jesús

    2012-01-01

    Heterozygous mutations in the melanocortin-4 receptor (MC4R) gene represent the most frequent cause of monogenic obesity in humans. MC4R mutation analysis in a cohort of 77 children with morbid obesity identified previously unreported heterozygous mutations (P272L, N74I) in two patients inherited from their obese mothers. A rare polymorphism (I251L, allelic frequency: 1/100) reported to protect against obesity was found in another obese patient. When expressed in neuronal cells, the cell surface abundance of wild-type MC4R and of the N74I and I251L variants and the cAMP generated by these receptors in response to exposure to the agonist, α-MSH, were not different. Conversely, MC4R P272L was retained in the endoplasmic reticulum and had reduced cell surface expression and signaling (by ≈3-fold). The chemical chaperone PBA, which promotes protein folding of wild-type MC4R, had minimal effects on the distribution and signaling of the P272L variant. In contrast, incubation with UBE-41, a specific inhibitor of ubiquitin activating enzyme E1, inhibited ubiquitination of MC4R P272L and increased its cell surface expression and signaling to similar levels as wild-type MC4R. UBE41 had much less profound effects on MC4R I316S, another obesity-linked MC4R variant trapped in the ER. These data suggest that P272L is retained in the ER by a propensity to be ubiquitinated in the face of correct folding, which is only minimally shared by MC4R I316S. Thus, studies that combine clinical screening of obese patients and investigation of the functional defects of the obesity-linked MC4R variants can identify specific ways to correct these defects and are the first steps towards personalized medicine. PMID:23251400

  4. Updating quasar bolometric luminosity corrections

    CERN Document Server

    Runnoe, Jessie C; Shang, Zhaohui

    2012-01-01

    Bolometric corrections are used in quasar studies to quantify total energy output based on a measurement of a monochromatic luminosity. First, we enumerate and discuss the practical difficulties of determining such corrections, then we present bolometric luminosities between 1 \\mu m and 8 keV rest frame and corrections derived from the detailed spectral energy distributions of 63 bright quasars of low to moderate redshift (z = 0.03-1.4). Exploring several mathematical fittings, we provide practical bolometric corrections of the forms L_iso=\\zeta \\lambda L_{\\lambda} and log(L_iso)=A+B log(\\lambda L_{\\lambda}) for \\lambda= 1450, 3000, and 5100 \\AA, where L_iso is the bolometric luminosity calculated under the assumption of isotropy. The significant scatter in the 5100 \\AA\\ bolometric correction can be reduced by adding a first order correction using the optical slope, \\alpha_\\lambda,opt. We recommend an adjustment to the bolometric correction to account for viewing angle and the anisotropic emission expected fr...

  5. Sever's Disease

    Science.gov (United States)

    ... take place on hard surfaces, such as track, basketball, soccer, and gymnastics. Sever's disease also can result ... diagnosing Sever's disease, some doctors order them to rule out other problems, such as fractures. Sever's disease ...

  6. NWS Corrections to Observations

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Form B-14 is the National Weather Service form entitled 'Notice of Corrections to Weather Records.' The forms are used to make corrections to observations on forms...

  7. Error Correction in Classroom

    Institute of Scientific and Technical Information of China (English)

    Dr. Grace Zhang

    2000-01-01

    Error correction is an important issue in foreign language acquisition. This paper investigates how students feel about the way in which error correction should take place in a Chinese-as-a foreign-language classroom, based on empirical data of a large scale. The study shows that there is a general consensus that error correction is necessary. In terms of correction strategy, the students preferred a combination of direct and indirect corrections, or a direct only correction. The former choice indicates that students would be happy to take either so long as the correction gets done.Most students didn't mind peer correcting provided it is conducted in a constructive way. More than halfofthe students would feel uncomfortable ifthe same error they make in class is corrected consecutively more than three times. Taking these findings into consideration, we may want to cncourage peer correcting, use a combination of correction strategies (direct only if suitable) and do it in a non-threatening and sensitive way. It is hoped that this study would contribute to the effectiveness of error correction in a Chinese language classroom and it may also have a wider implication on other languages.

  8. Background correction in near-infrared spectra of plant extracts by orthogonal signal correction

    Institute of Scientific and Technical Information of China (English)

    QU Hai-bin; OU Dan-lin; CHENG Yi-yu

    2005-01-01

    In near-infrared (NIR) analysis of plant extracts, excessive background often exists in near-infrared spectra. The detection of active constituents is difficult because of excessive background, and correction of this problem remains difficult. In this work, the orthogonal signal correction (OSC) method was used to correct excessive background. The method was also compared with several classical background correction methods, such as offset correction, multiplicative scatter correction (MSC),standard normal variate (SNV) transformation, de-trending (DT), first derivative, second derivative and wavelet methods. A simulated dataset and a real NIR spectral dataset were used to test the efficiency of different background correction methods. The results showed that OSC is the only effective method for correcting excessive background.

  9. EDITORIAL: Politically correct physics?

    Science.gov (United States)

    Pople Deputy Editor, Stephen

    1997-03-01

    If you were a caring, thinking, liberally minded person in the 1960s, you marched against the bomb, against the Vietnam war, and for civil rights. By the 1980s, your voice was raised about the destruction of the rainforests and the threat to our whole planetary environment. At the same time, you opposed discrimination against any group because of race, sex or sexual orientation. You reasoned that people who spoke or acted in a discriminatory manner should be discriminated against. In other words, you became politically correct. Despite its oft-quoted excesses, the political correctness movement sprang from well-founded concerns about injustices in our society. So, on balance, I am all for it. Or, at least, I was until it started to invade science. Biologists were the first to feel the impact. No longer could they refer to 'higher' and 'lower' orders, or 'primitive' forms of life. To the list of undesirable 'isms' - sexism, racism, ageism - had been added a new one: speciesism. Chemists remained immune to the PC invasion, but what else could you expect from a group of people so steeped in tradition that their principal unit, the mole, requires the use of the thoroughly unreconstructed gram? Now it is the turn of the physicists. This time, the offenders are not those who talk disparagingly about other people or animals, but those who refer to 'forms of energy' and 'heat'. Political correctness has evolved into physical correctness. I was always rather fond of the various forms of energy: potential, kinetic, chemical, electrical, sound and so on. My students might merge heat and internal energy into a single, fuzzy concept loosely associated with moving molecules. They might be a little confused at a whole new crop of energies - hydroelectric, solar, wind, geothermal and tidal - but they could tell me what devices turned chemical energy into electrical energy, even if they couldn't quite appreciate that turning tidal energy into geothermal energy wasn't part of the

  10. Diophantine Correct Open Induction

    CERN Document Server

    Raffer, Sidney

    2010-01-01

    We give an induction-free axiom system for diophantine correct open induction. We relate the problem of whether a finitely generated ring of Puiseux polynomials is diophantine correct to a problem about the value-distribution of a tuple of semialgebraic functions with integer arguments. We use this result, and a theorem of Bergelson and Leibman on generalized polynomials, to identify a class of diophantine correct subrings of the field of descending Puiseux series with real coefficients.

  11. Correcting Reflux Laparoscopically

    Directory of Open Access Journals (Sweden)

    Eric C Poulin

    1998-01-01

    Full Text Available Most operations in the abdominal cavity and chest can be performed using minimally invasive techniques. As yet it has not been determined which laparoscopic procedures are preferable to the same operations done through conventional laparotomy. However, most surgeons who have completed the learning curves of these procedures believe that most minimally invasive techniques will be scientifically recognized soon. The evolution, validation and justification of advanced laparoscopic surgical methods seem inevitable. Most believe that the trend towards procedures that minimize or eliminate the trauma of surgery while adhering to accepted surgical principles is irreversible. The functional results of laparoscopic antireflux surgery in the seven years since its inception have been virtually identical to the success curves generated with open fundoplication in past years. Furthermore, overall patient outcomes with laparoscopic procedures have been superior to outcomes with the traditional approach. Success is determined by patient selection and operative technique. Patient evaluation should include esophagogastroduodenoscopy, barium swallow, 24 h pH study and esophageal motility study. Gastric emptying also should be evaluated. Patients who have abnormal propulsion in the esophagus should not receive a complete fundoplication (Nissen because it adds a factor of obstruction. Dor or Toupet procedures are adequate alternatives. Prokinetic agents, dilation or pyloroplasty are used for pyloric obstruction ranging from little to more severe. Correcting reflux laparoscopically is more difficult in patients with obesity, peptic strictures, paraesophageal hernias, short esophagus, or a history of previous upper abdominal or antireflux surgery.

  12. CORRECTING WRITTEN WORK

    Institute of Scientific and Technical Information of China (English)

    1994-01-01

    Introduction During the teaching and learning process, teachers often check how much students have understood through written assignments. In this article I’d like to describe one method of correcting students’ written work by using a variety of symbols to indicate where students have gone wrong, then asking students to correct their work themselves.

  13. Observation in effect of early oxygen atomizing inhalation with oxygen mask on correction of hy-poxemia of patients with severe head injury%早期氧气面罩雾化给氧对纠正重型颅脑损伤患者低氧血症的影响效果观察

    Institute of Scientific and Technical Information of China (English)

    提文萍

    2009-01-01

    Objective To explore the feasibility and safety of early oxygen atomizing inhalation with oxygen mask on correction of hypoxemia of patients with severe head injury in order to promote the early recov-ery of patients. Methods 98 cases of patients with severe head injury were randomly divided into the obser-vation group(48 cases) and the control group(50 cases), the observation group received conventional treatment as well as oxygen atomizing inhalation with oxygen mask, the control group used nasal catheter with wet gauze covering mouth and nose for oxygen supply. Results The arterial oxygen saturation rate, partial pressure of oxygen markedly improved in the observation group. Significant difference existed in mortality rate between the two groups, while no significant difference was seen in heart rate, blood pressure, pH and PaCO2 between the two groups. Conclusions Oxygen atomizing inhalation with oxygen mask can quickly and effectively correct the hypoxic state and correct hypoxemia of patients with severe head injury.%目的 探讨氧气面罩雾化给氧方式对重型颅脑损伤患者低氧血症的可行性及安全性,以促进患者早日康复.方法 将收治98例重型颅脑损伤患者随机分为观察组48例和对照组50例,在常规治疗的同时,观察组采用氧气面罩接雾化器给氧方式进行给氧;对照组采用鼻塞导管湿纱布覆盖口鼻进行给氧.结果 观察组其动脉血氧饱和度、氧分压明显提高.2组病死率比较差异明显,而2组患者的心率、血压、pH、PaCO2比较差异不明显.结论 氧气面罩雾化器给氧能快速、有效纠正重型颅脑损伤患者缺氧状态,纠正低氧血症.

  14. Video Error Correction Using Steganography

    Directory of Open Access Journals (Sweden)

    Robie David L

    2002-01-01

    Full Text Available The transmission of any data is always subject to corruption due to errors, but video transmission, because of its real time nature must deal with these errors without retransmission of the corrupted data. The error can be handled using forward error correction in the encoder or error concealment techniques in the decoder. This MPEG-2 compliant codec uses data hiding to transmit error correction information and several error concealment techniques in the decoder. The decoder resynchronizes more quickly with fewer errors than traditional resynchronization techniques. It also allows for perfect recovery of differentially encoded DCT-DC components and motion vectors. This provides for a much higher quality picture in an error-prone environment while creating an almost imperceptible degradation of the picture in an error-free environment.

  15. Probabilistic quantum error correction

    CERN Document Server

    Fern, J; Fern, Jesse; Terilla, John

    2002-01-01

    There are well known necessary and sufficient conditions for a quantum code to correct a set of errors. We study weaker conditions under which a quantum code may correct errors with probabilities that may be less than one. We work with stabilizer codes and as an application study how the nine qubit code, the seven qubit code, and the five qubit code perform when there are errors on more than one qubit. As a second application, we discuss the concept of syndrome quality and use it to suggest a way that quantum error correction can be practically improved.

  16. [Orthognathic surgery: corrective bone operations].

    Science.gov (United States)

    Reuther, J

    2000-05-01

    The article reviews the history of orthognathic surgery from the middle of the last century up to the present. Initially, mandibular osteotomies were only performed in cases of severe malformations. But during the last century a precise and standardized procedure for correction of the mandible was established. Multiple modifications allowed control of small fragments, functionally stable osteosynthesis, and finally a precise positioning of the condyle. In 1955 Obwegeser and Trauner introduced the sagittal split osteotomy by an intraoral approach. It was the final breakthrough for orthognathic surgery as a standard treatment for corrections of the mandible. Surgery of the maxilla dates back to the nineteenth century. B. von Langenbeck from Berlin is said to have performed the first Le Fort I osteotomy in 1859. After minor changes, Wassmund corrected a posttraumatic malocclusion by a Le Fort I osteotomy in 1927. But it was Axhausen who risked the total mobilization of the maxilla in 1934. By additional modifications and further refinements, Obwegeser paved the way for this approach to become a standard procedure in maxillofacial surgery. Tessier mobilized the whole midface by a Le Fort III osteotomy and showed new perspectives in the correction of severe malformations of the facial bones, creating the basis of modern craniofacial surgery. While the last 150 years were distinguished by the creation and standardization of surgical methods, the present focus lies on precise treatment planning and the consideration of functional aspects of the whole stomatognathic system. To date, 3D visualization by CT scans, stereolithographic models, and computer-aided treatment planning and simulation allow surgery of complex cases and accurate predictions of soft tissue changes.

  17. Towards a single proposal is spelling correction

    CERN Document Server

    Agirre, E; Sarasola, K

    1998-01-01

    The study presented here relies on the integrated use of different kinds of knowledge in order to improve first-guess accuracy in non-word context-sensitive correction for general unrestricted texts. State of the art spelling correction systems, e.g. ispell, apart from detecting spelling errors, also assist the user by offering a set of candidate corrections that are close to the misspelled word. Based on the correction proposals of ispell, we built several guessers, which were combined in different ways. Firstly, we evaluated all possibilities and selected the best ones in a corpus with artificially generated typing errors. Secondly, the best combinations were tested on texts with genuine spelling errors. The results for the latter suggest that we can expect automatic non-word correction for all the errors in a free running text with 80% precision and a single proposal 98% of the times (1.02 proposals on average).

  18. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... It can also invite bacteria that lead to gum disease. Click here to find out more. Who We ... It can also invite bacteria that lead to gum disease. Click here to find out more. Corrective Jaw ...

  19. Correction of Neonatal Hypovolemia

    Directory of Open Access Journals (Sweden)

    V. V. Moskalev

    2007-01-01

    Full Text Available Objective: to evaluate the efficiency of hydroxyethyl starch solution (6% refortane, Berlin-Chemie versus fresh frozen plasma used to correct neonatal hypovolemia.Materials and methods. In 12 neonatal infants with hypoco-agulation, hypovolemia was corrected with fresh frozen plasma (10 ml/kg body weight. In 13 neonates, it was corrected with 6% refortane infusion in a dose of 10 ml/kg. Doppler echocardiography was used to study central hemodynamic parameters and Doppler study was employed to examine regional blood flow in the anterior cerebral and renal arteries.Results. Infusion of 6% refortane and fresh frozen plasma at a rate of 10 ml/hour during an hour was found to normalize the parameters of central hemodynamics and regional blood flow.Conclusion. Comparative analysis of the findings suggests that 6% refortane is the drug of choice in correcting neonatal hypovolemia. Fresh frozen plasma should be infused in hemostatic disorders. 

  20. Corrected Age for Preemies

    Science.gov (United States)

    ... Spread the Word Shop AAP Find a Pediatrician Ages & Stages Prenatal Baby Bathing & Skin Care Breastfeeding Crying & ... Listen Español Text Size Email Print Share Corrected Age For Preemies Page Content Article Body If your ...

  1. Correctness is not enough

    CERN Document Server

    Pryor, Louise

    2008-01-01

    The usual aim of spreadsheet audit is to verify correctness. There are two problems with this: first, it is often difficult to tell whether the spreadsheets in question are correct, and second, even if they are, they may still give the wrong results. These problems are explained in this paper, which presents the key criteria for judging a spreadsheet and discusses how those criteria can be achieved

  2. Adaptable DC offset correction

    Science.gov (United States)

    Golusky, John M. (Inventor); Muldoon, Kelly P. (Inventor)

    2009-01-01

    Methods and systems for adaptable DC offset correction are provided. An exemplary adaptable DC offset correction system evaluates an incoming baseband signal to determine an appropriate DC offset removal scheme; removes a DC offset from the incoming baseband signal based on the appropriate DC offset scheme in response to the evaluated incoming baseband signal; and outputs a reduced DC baseband signal in response to the DC offset removed from the incoming baseband signal.

  3. [Conceptual basics of paralytic lagophthalmos correction].

    Science.gov (United States)

    Grusha, Ia O

    2013-01-01

    The article discusses complications of paralytic lagophthalmos, such as exposure keratopathy, keratitis, corneal lysis, as well as other exposure-related problems and abnormalities of eyelid position. Thorough analysis of surgical methods of eyelids malposition correction, besides conservative protective measures for the cornea, has been performed. The primary treatment goal in facial nerve paralysis is the prevention of severe corneal complications. The most effective methods of static correction of paralytic lagophthalmos, once of narrowing of palpebral fissure by means of circular suture, and different techniques of ectropion correction are discussed. Application results on an upper eyelid implant are presented. Indications for suture and permanent tarsorrhaphy in patients with facial paralysis are also observed.

  4. [Severe asthma].

    Science.gov (United States)

    González, Claudio D

    2016-01-01

    The objectives of this work were to investigate the frequency of severe asthma (SA) according to WHO definition and to compare SA patients' characteristics with those of non-severe asthma (NSA); secondly, to investigate the level of control reached throughout a period of regular treatment. Between 1-1-2005 and 12-31-2014, 471 medical records from patients with bronchial asthma assisted in Buenos Aires City were analyzed. SA frequency was 40.1% (189/471), being significantly higher among patients from the public health system (47.7%, 108/226 vs. 33%, 81/245, p = 0.001). SA patients were older than NSA ones (51.3 ± 17.4 vs. 42.6 ± 17.1 years, p = 0.000), presented longer time since onset of the disease (median 30 vs. 20 years, p = 0.000), lower educational levels (secondary level or higher 41.7% vs. 58.1%, p = 0.000), lower frequency of rhinitis (47% vs. 60.6%, p = 0.004), more severe levels of airway obstruction (FEV% 50.2 ± 13.7 vs. 77.7 ± 12.4, p = 0.000), more frequent antecedents of Near Fatal Asthma (11.1% vs. 2.8%, p = 0.000), higher levels of serum IgE (median of 410 vs. 279 UI/l, p = 0.01) and higher demand of systemic steroids requirements and hospitalizations (68.7% vs. 50.7%, p = 0.000 and 37.5% vs. 15.9%, p = 0.000, respectively). A 30.6% of SA patients (58/189) reached a follow-up period of 12 months, 13 (22.5%) of whom reached the controlled asthma level. The frequency of SA found seems to be considerable. Multicenter studies to investigate the levels of control reached by SA patients with access to proper treatment are recommended.

  5. An introduction to Bartlett correction and bias reduction

    CERN Document Server

    Cordeiro, Gauss M

    2014-01-01

    This book presents a concise introduction to Bartlett and Bartlett-type corrections of statistical tests and bias correction of point estimators. The underlying idea behind both groups of corrections is to obtain higher accuracy in small samples. While the main focus is on corrections that can be analytically derived, the authors also present alternative strategies for improving estimators and tests based on bootstrap, a data resampling technique, and discuss concrete applications to several important statistical models.

  6. CORRECTING STUDENTS’ HOMEWORK

    Institute of Scientific and Technical Information of China (English)

    1996-01-01

    IntroductionI have been teaching English for ten years and like many other teachers in middle schools.I teach threebig classes each year.Before I had the opportunity to further my study in the SMSTT project run jointlyby the British Council and the State Education Commission of China at Southwest China TeachersUniversity.I found it somewhat difficult to correct students homework since I had so many students.Now I still have three big classes.but I have found it casier to correct students homework since I havebeen combining the techniques learned in the project with my own successful experience.In this article.I attempt to discuss my approach to correcting students homework.I hope that it will be of some use tothose who have not vet had the opportunity to further their training.

  7. Model Correction Factor Method

    DEFF Research Database (Denmark)

    Christensen, Claus; Randrup-Thomsen, Søren; Morsing Johannesen, Johannes

    1997-01-01

    The model correction factor method is proposed as an alternative to traditional polynomial based response surface techniques in structural reliability considering a computationally time consuming limit state procedure as a 'black box'. The class of polynomial functions is replaced by a limit...... statebased on an idealized mechanical model to be adapted to the original limit state by the model correction factor. Reliable approximations are obtained by iterative use of gradient information on the original limit state function analogously to previous response surface approaches. However, the strength...... of the model correction factor method, is that in simpler form not using gradient information on the original limit state function or only using this information once, a drastic reduction of the number of limit state evaluation is obtained together with good approximations on the reliability. Methods...

  8. Utilization of edge-to-edge valve plastic technique to correct severe tricuspid regurgitation in patients with congenital heart disease%"缘对缘"瓣膜成形术在先天性心脏病合并重度三尖瓣关闭不全中的应用

    Institute of Scientific and Technical Information of China (English)

    柳克晔; 来永强; 罗志强; 罗毅; 韩喆; 刘福林; 梁宜武

    2010-01-01

    Objective Tricuspid regurgitation is often associated in patients with congenital heart disease. Significant morbidity and mortality are related to tricuspid valve replacement. Tricuspid valve plasty is still a preferred choice. This report deals with our surgical experience in using edge-to-edge valve plasty technique to correct severe tricuspid regurgitation in patients with congenital heart disease. Methods From April 2001 to Mar. 2010, severe tricuspid regurgitation was corrected with a flexible band anuloplasty and edge-to-edge valve plasty technique in 14 patients with congenital heart disease. The age ranged from 7 years to 62 years [average (31.2 ± 16.1 ) years]. Congenital cardiac anomalies include: atrioventricular canal in 5 cases, secundum atrial septal defect in 6 cases, secundum atrial septal defect with mitral valve regurgitation in 2 cases and cor triatriatum in 1 case. Results No hospital death or postoperative morbidity occurred. No or trivial tricuspid regurgitation was present in 11 cases and mild tricuspid regurgitation in 3 cases at discharge. The follow-up ranged from 3 month to 97 months [average (51.6 ± 26.8 ) months]. No tricuspid stenosis was found. No or trivial tricuspid regurgitation was present in 5 cases. Mild tricuspid regurgitation was present in 8 cases, and moderate tricuspid regurgitation in 1 case at the latest followup. Conclusion Edge-to-edge valve plasty is an easy, effective and important procedure to correct severe tricuspid regurgitation in patients with congenital heart disease.%目的 总结运用"缘对缘"成形技术治疗先天性心脏病病人的重度三尖瓣关闭不全的效果.方法 2001年4月至2010年3月,对14例先大性心脏病合并重度三尖瓣关闭不全病人采用常规三尖瓣瓣环成形和"缘对缘"技术行三尖瓣成形.年龄7~62岁,平均(31.2±16.1)岁.先大性心脏畸形包括继发孔房间隔缺损6例,房室管畸形5例,继发孔房间隔缺损合并二尖瓣关闭不全2

  9. Correction of ocular dystopia.

    Science.gov (United States)

    Janecka, I P

    1996-04-01

    The purpose of this study was to examine results with elective surgical correction of enophthalmos. The study was a retrospective assessment in a university-based referral practice. A consecutive sample of 10 patients who developed ocular dystopia following orbital trauma was examined. The main outcome measures were a subjective evaluation by patients and objective measurements of patients' eye position. The intervention was three-dimensional orbital reconstruction with titanium plates. It is concluded that satisfactory correction of enophthalmos and ocular dystopia can be achieved with elective surgery using titanium plates. In addition, intraoperative measurements of eye position in three planes increases the precision of surgery.

  10. Refraction corrections for surveying

    Science.gov (United States)

    Lear, W. M.

    1980-01-01

    Optical measurements of range and elevation angles are distorted by refraction of Earth's atmosphere. Theoretical discussion of effect, along with equations for determining exact range and elevation corrections, is presented in report. Potentially useful in optical site surveying and related applications, analysis is easily programmed on pocket calculator. Input to equation is measured range and measured elevation; output is true range and true elevation.

  11. Renormalons and Power Corrections

    CERN Document Server

    Beneke, Martin

    2000-01-01

    Even for short-distance dominated observables the QCD perturbation expansion is never complete. The divergence of the expansion through infrared renormalons provides formal evidence of this fact. In this article we review how this apparent failure can be turned into a useful tool to investigate power corrections to hard processes in QCD.

  12. Radiative Corrections and Z'

    CERN Document Server

    Erler, Jens

    2009-01-01

    Radiative corrections to parity violating deep inelastic electron scattering are reviewed including a discussion of the renormalization group evolution of the weak mixing angle. Recently obtained results on hypothetical Z' bosons - for which parity violating observables play an important role - are also presented.

  13. General forecasting correcting formula

    OpenAIRE

    Harin, Alexander

    2009-01-01

    A general forecasting correcting formula, as a framework for long-use and standardized forecasts, is created. The formula provides new forecasting resources and new possibilities for expansion of forecasting including economic forecasting into the areas of municipal needs, middle-size and small-size business and, even, to individual forecasting.

  14. ERRORS AND CORRECTION

    Institute of Scientific and Technical Information of China (English)

    1998-01-01

    To err is human . Since the 1960s, most second language teachers or language theorists have regarded errors as natural and inevitable in the language learning process . Instead of regarding them as terrible and disappointing, teachers have come to realize their value. This paper will consider these values, analyze some errors and propose some effective correction techniques.

  15. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... of jaws and teeth. Surgery can improve chewing, speaking and breathing. While the patient's appearance may be dramatically enhanced as a result of their surgery, orthognathic surgery is performed to correct functional problems. Jaw Surgery can have a dramatic effect on ...

  16. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... functional problems. Jaw Surgery can have a dramatic effect on many aspects of life. Following are some of the conditions that may indicate the need for corrective jaw surgery: Difficulty chewing, or biting food Difficulty swallowing Chronic jaw or jaw joint (TMJ) ...

  17. Corrections for collaborators

    NARCIS (Netherlands)

    NN,

    1953-01-01

    In the ”Directions and Hints” for collaborators in Flora Malesiana, which has been forwarded to all collaborators, two corrections should be made, viz: 1) p. 12; Omit the explanatory notes under Jamaica Plain, Mass., and Cambridge, Mass. 2) p. 13; Add as number 12a; Stockholm, Paleobotaniska Avdelni

  18. General forecasting correcting formula

    OpenAIRE

    2009-01-01

    A general forecasting correcting formula, as a framework for long-use and standardized forecasts, is created. The formula provides new forecasting resources and new possibilities for expansion of forecasting including economic forecasting into the areas of municipal needs, middle-size and small-size business and, even, to individual forecasting.

  19. Tunica vaginalis free graft for the correction of chordee.

    Science.gov (United States)

    Perlmutter, A D; Montgomery, B T; Steinhardt, G F

    1985-08-01

    Tunica vaginalis free grafts were used to correct severe chordee not amenable to other surgical maneuvers in 11 boys. Postoperatively, the penis was straight in 10 patients and had some degree of downward angulation in 1 boy. The tunica vaginalis free graft seems to be a useful technique for the correction of severe chordee.

  20. One reason, several logics

    Directory of Open Access Journals (Sweden)

    Evandro Agazzi

    2011-06-01

    Full Text Available Humans have used arguments for defending or refuting statements long before the creation of logic as a specialized discipline. This can be interpreted as the fact that an intuitive notion of "logical consequence" or a psychic disposition to articulate reasoning according to this pattern is present in common sense, and logic simply aims at describing and codifying the features of this spontaneous capacity of human reason. It is well known, however, that several arguments easily accepted by common sense are actually "logical fallacies", and this indicates that logic is not just a descriptive, but also a prescriptive or normative enterprise, in which the notion of logical consequence is defined in a precise way and then certain rules are established in order to maintain the discourse in keeping with this notion. Yet in the justification of the correctness and adequacy of these rules commonsense reasoning must necessarily be used, and in such a way its foundational role is recognized. Moreover, it remains also true that several branches and forms of logic have been elaborated precisely in order to reflect the structural features of correct argument used in different fields of human reasoning and yet insufficiently mirrored by the most familiar logical formalisms.

  1. Nonperturbative QCD corrections to electroweak observables

    Energy Technology Data Exchange (ETDEWEB)

    Dru B Renner, Xu Feng, Karl Jansen, Marcus Petschlies

    2011-12-01

    Nonperturbative QCD corrections are important to many low-energy electroweak observables, for example the muon magnetic moment. However, hadronic corrections also play a significant role at much higher energies due to their impact on the running of standard model parameters, such as the electromagnetic coupling. Currently, these hadronic contributions are accounted for by a combination of experimental measurements and phenomenological modeling but ideally should be calculated from first principles. Recent developments indicate that many of the most important hadronic corrections may be feasibly calculated using lattice QCD methods. To illustrate this, we will examine the lattice computation of the leading-order QCD corrections to the muon magnetic moment, paying particular attention to a recently developed method but also reviewing the results from other calculations. We will then continue with several examples that demonstrate the potential impact of the new approach: the leading-order corrections to the electron and tau magnetic moments, the running of the electromagnetic coupling, and a class of the next-to-leading-order corrections for the muon magnetic moment. Along the way, we will mention applications to the Adler function, the determination of the strong coupling constant and QCD corrections to muonic-hydrogen.

  2. Nonperturbative QCD corrections to electroweak observables

    Energy Technology Data Exchange (ETDEWEB)

    Renner, Dru B. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Feng, Xu [High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki (Japan); Jansen, Karl [Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany); Petschlies, Marcus [The Cyprus Institute, Nicosia (Cyprus)

    2012-06-15

    Nonperturbative QCD corrections are important to many low-energy electroweak observables, for example the muon magnetic moment. However, hadronic corrections also play a significant role at much higher energies due to their impact on the running of standard model parameters, such as the electromagnetic coupling. Currently, these hadronic contributions are accounted for by a combination of experimental measurements, effective field theory techniques and phenomenological modeling but ideally should be calculated from first principles. Recent developments indicate that many of the most important hadronic corrections may be feasibly calculated using lattice QCD methods. To illustrate this, we examine the lattice computation of the leading-order QCD corrections to the muon magnetic moment, paying particular attention to a recently developed method but also reviewing the results from other calculations. We then continue with several examples that demonstrate the potential impact of the new approach: the leading-order corrections to the electron and tau magnetic moments, the running of the electromagnetic coupling, and a class of the next-to-leading-order corrections for the muon magnetic moment. Along the way, we mention applications to the Adler function, which can be used to determine the strong coupling constant, and QCD corrections to muonic-hydrogen.

  3. Lump corrections for radioactive waste assay.

    Science.gov (United States)

    Miller, T J

    2009-09-01

    Previous studies have shown that automated radioactive waste assay techniques, such as segmented gamma scanner (SGS) and automated qualitative and quantitative (AQ2), have severely underestimated fissile material due to either the malfunction or absence of appropriate lump correction routines. This paper examines the application of manual techniques, such as Monte Carlo N particle (MCNP) and spectral non-destructive assay platform (SNAP) software, to lump corrections in plutonium (Pu), enriched uranium (EU) and depleted uranium (DU) waste streams. Excellent results have been obtained when comparing MCNP with SNAP and applying the SNAP lump correction routine to a range of simulated and typical wastes containing various Pu and EU lump sizes. It has been concluded that the need for lump corrections was relatively rare and usually apparent from abnormal gamma ray peak area ratios, since most AWE waste streams are only lightly shielded.

  4. Technique for correction of lop ear.

    Science.gov (United States)

    Elsahy, N I

    1990-04-01

    Various techniques of correction of lop ear have been described. Minor lop ear deformity can easily be corrected with simple excision of the overhanging auricular cartilage. Moderate and severe lop ear deformities, on the other hand, are more difficult to correct because there is actual reduction in size of the upper third of the ear in addition to the overhanging auricular cartilage. The purpose of this paper was to present a new technique used to correct the moderate lop ear deformity. In addition to excising the overhanging cartilage, I rotate a cartilage flap from the anthelix upward where the missing superior crus was supposed to be. This flap increases the vertical height of the ear and creates a new superior crus. I applied this technique on three cases of moderate lop ear deformities with good results.

  5. Topographical Correction on Gravity Data in Complex Mountainous Areas

    Institute of Scientific and Technical Information of China (English)

    YangZhanjun; LiuYunxiang; ChaiYupu

    2003-01-01

    Discussed in this paper was the pre-processing procedure for gravity data, including topographical correction,intermediary layer correction etc. The necessity to utilize aerial photogram to do topographical correction in middle area was discussed, and a real examples given showing the effect. We discussed the problems caused by the maximum radius for conventional correction, the necessity of extending the radius for topographical correction, the corresponding method for calculation of topographical correction, and the standard of optimally selecting the radium for topographical correction.This method could raise the data accuracy of gravity survey in the complex mountainous areas by several millil-gals-several tens milli-gals reaching the exploration effect as well as in plain area almost.

  6. Clinical efficacies of transpedicular bivertebral osteotomy for correction of severe kyphosis in ankylosing spondylilis patients%经椎弓根双椎体截骨术治疗重度强直性脊柱炎后凸畸形的临床疗效

    Institute of Scientific and Technical Information of China (English)

    伍佳剑; 马华松; 王蒙; 周雪峰; 彭军

    2014-01-01

    背景:经椎弓跟双椎体截骨治疗重度强直性脊柱炎后凸畸形能够很好地恢复矢状位平衡,术后效果明显,但缺乏临床随访观察研究。  目的:探讨重度强直性脊柱炎后凸畸形经椎弓根双椎体截骨术治疗的临床疗效。  方法:回顾性分析2009年1月至2011年12月行经椎弓根双椎体截骨术治疗的34例强直性脊柱炎重度后凸畸形患者的临床资料。男22例,女12例;年龄23~62岁,平均(38.3±9.6)岁。统计测量患者术前、术后身高,X线片的矢状面平衡参数,如颌眉角、胸椎后凸角、腰椎前凸、脊柱整体后凸角等。  结果:本组患者身高术前为(125.3±7.8)cm,术后为(165.4±10.3)cm;颌眉角术前为92.4°±8.3°,术后为13.2°±11.9°;胸椎后凸角术前为72.3°±14°,术后为63.4°±11.5°;腰椎前凸角术前为-30°±20.3°,术后为29.0°±13.1°;脊柱整体后凸角术前为100.4°±19.3°,术后为26.4°±12.4°;C7铅垂线与骶骨后上角之间的垂直距离术前为(50.3±13.4)cm,术后为(15.4±7.2)cm。上述指标术前与术后比较差异均有统计学意义(P<0.05),末次随访与术后比较差异无统计学意义(P>0.05)。SRS-22评分术前为(4.0±0.4)分,术后为(1.6±0.2)分,术前与术后比较差异有统计学意义(P<0.05)。末次随访时所有患者均无内固定断裂、脱出,均达骨性融合。  结论:对于重度强直性脊柱炎后凸畸形,经椎弓根双椎体截骨术是一种安全、有效的术式,具有良好的临床效果。%Background:Transpedicular bivertebral osteotomy for correction of severe kyphosis in ankylosing spondylilis patients can achieve a good sagittal balance, but clinical follow-up study is insufficient. Objective:To explore efficacies of transpedicular bivertebral osteotomy in correction of severe kyphotic deformity in anky-losing spondylitis patients

  7. Radiative corrections to DIS

    CERN Document Server

    Krasny, Mieczyslaw Witold

    2008-01-01

    Early deep inelastic scattering (DIS) experiments at SLAC discovered partons, identified them as quarks and gluons, and restricted the set of the candidate theories for strong interactions to those exhibiting the asymptotic freedom property. The next generation DIS experiments at FNAL and CERN confirmed the predictions of QCD for the size of the scaling violation effects in the nucleon structure functions. The QCD fits to their data resulted in determining the momentum distributions of the point-like constituents of nucleons. Interpretation of data coming from all these experiments and, in the case of the SLAC experiments, even an elaboration of the running strategies, would not have been possible without a precise understanding of the electromagnetic radiative corrections. In this note I recollect the important milestones, achieved in the period preceding the HERA era, in the high precision calculations of the radiative corrections to DIS, and in the development of the methods of their experimental control. ...

  8. Aberration Corrected Emittance Exchange

    CERN Document Server

    Nanni, Emilio A

    2015-01-01

    Full exploitation of emittance exchange (EEX) requires aberration-free performance of a complex imaging system including active radio-frequency (RF) elements which can add temporal distortions. We investigate the performance of an EEX line where the exchange occurs between two dimensions with normalized emittances which differ by orders of magnitude. The transverse emittance is exchanged into the longitudinal dimension using a double dog-leg emittance exchange setup with a 5 cell RF deflector cavity. Aberration correction is performed on the four most dominant aberrations. These include temporal aberrations that are corrected with higher order magnetic optical elements located where longitudinal and transverse emittance are coupled. We demonstrate aberration-free performance of emittances differing by 4 orders of magnitude, i.e. an initial transverse emittance of $\\epsilon_x=1$ pm-rad is exchanged with a longitudinal emittance of $\\epsilon_z=10$ nm-rad.

  9. Correcting Duporcq's theorem☆

    Science.gov (United States)

    Nawratil, Georg

    2014-01-01

    In 1898, Ernest Duporcq stated a famous theorem about rigid-body motions with spherical trajectories, without giving a rigorous proof. Today, this theorem is again of interest, as it is strongly connected with the topic of self-motions of planar Stewart–Gough platforms. We discuss Duporcq's theorem from this point of view and demonstrate that it is not correct. Moreover, we also present a revised version of this theorem. PMID:25540467

  10. Congenitally corrected transposition

    Directory of Open Access Journals (Sweden)

    Debich-Spicer Diane

    2011-05-01

    Full Text Available Abstract Congenitally corrected transposition is a rare cardiac malformation characterized by the combination of discordant atrioventricular and ventriculo-arterial connections, usually accompanied by other cardiovascular malformations. Incidence has been reported to be around 1/33,000 live births, accounting for approximately 0.05% of congenital heart malformations. Associated malformations may include interventricular communications, obstructions of the outlet from the morphologically left ventricle, and anomalies of the tricuspid valve. The clinical picture and age of onset depend on the associated malformations, with bradycardia, a single loud second heart sound and a heart murmur being the most common manifestations. In the rare cases where there are no associated malformations, congenitally corrected transposition can lead to progressive atrioventricular valvar regurgitation and failure of the systemic ventricle. The diagnosis can also be made late in life when the patient presents with complete heart block or cardiac failure. The etiology of congenitally corrected transposition is currently unknown, and with an increase in incidence among families with previous cases of congenitally corrected transposition reported. Diagnosis can be made by fetal echocardiography, but is more commonly made postnatally with a combination of clinical signs and echocardiography. The anatomical delineation can be further assessed by magnetic resonance imaging and catheterization. The differential diagnosis is centred on the assessing if the patient is presenting with isolated malformations, or as part of a spectrum. Surgical management consists of repair of the associated malformations, or redirection of the systemic and pulmonary venous return associated with an arterial switch procedure, the so-called double switch approach. Prognosis is defined by the associated malformations, and on the timing and approach to palliative surgical care.

  11. Surgical correction of pectus excavatum.

    Science.gov (United States)

    Holcomb, G W

    1977-06-01

    It has been observed that some patients who had correction of funnel chest deformity by methods which failed to provide fixed elevation of the involved sternal segment developed progressive sagging in later years in spite of looking good at the operating table. This has led to the adoption of a new technique of double sternal support. This procedure has resulted in 35 of 37 children (94%) being classified as excellent or satisfactory. This double support was initially established in 1959 by overlapping the upper transsected sternum while maintaining elevation of the lower end with a soft tissue sling of perichondrium and intercostal muscle. Beginning in 1961, a rigid bridge of rib or stainless steel bar was substituted at the lower end of the sternum. This has provided better support and the current preference of using the steel bar has been validated in this group of patients. The few disappointments were related to removal of the bar earlier than desired, failure to excise all the protruding sternal cartilage stumps or rib graft tips and inability to cover the lateral sternal edges with pectoral muscles. If possible, the steel bar should not be removed before 12 mo. When these pitfalls were avoided, the results were almost uniformly excellent. The wisdom of excising all depressed cartilaginous segments, as advocated by Ravitch in 1949, has been substantiated. A submammary transverse incision has provided an excellent cosmetic appearance. The morbidity has been low and the mortality zero. In spite of the absence of objective evidence of cardiopulmonary dysfunction, there seems to be an almost uniform improvement in appearance and in patient activity following successful correction of the funnel chest. The latter may be as much a psychological response as a physiologic one. The low morbidity, satisfactory long term results, and general improvement in the patient's body image and outlook on life indicate the need to offer correction of the severe pectus excavatum

  12. Distraction osteogenesis united with orthognathic surgery and orthodontic treatment in correction of severe mandibular micrognathia concomitancy with asymmetric dento-maxillofacial deformity%牵张成骨联合正颌正畸治疗成人严重小下颌畸形

    Institute of Scientific and Technical Information of China (English)

    陈宇轩; 韩小宪; 赵林炜; 陈书军; 林雪梅; 魏晓总

    2015-01-01

    Objective:To evaluate the effect of distraction osteogenesis united with orthognathic surgery and orthodon-tic treatment in correction of severe mandibular micrognathia concomitancy with asymmetric dento-maxillofacial deformity. Method:Two patients who suffered from micromandibular deformity concomitancy with asymmetric dento-maxillofacial de-formity were treated by distraction osteogenesis and orthognathic surgery under general anesthesia.At the first stage ,after os-teotomy of mandibular body,the tractor was put on,the mandible was protruded so as to rectify micrognathism.At the second stage,the tractor was removed,followed by an orthognathic operation and orthodontic treatment for occlusal reconstruction. Result:ALL the operations were performed as planned.The minimum distance of distraction was 25 mm ,the maximum was 30 mm,in mandible of 2 patients with 4 sides.The distraction process was smooth in all the cases.The osteogenesis was good,without infection and other complications.The increase of SNB angle was from preoperative 67 to 80 on average post-operatively. Micrognathism and asymmetric dento-maxillofacial deformity was rectified. After the orthognathic operation and orthodontic treatment,occlusion was reconstructed. The patient was significantly improved in the appearance and satisfactory with the results. There was no recurence during a follow-up of 30 months after surgery. Conclusion:Distraction osteogenesis united with orthognathic surgery and orthodontic treatment can be used to effectively correct severe dento-maxillofacial de-formities with low relapse rate and stable result.It is an ideal means to treat severe mandibular micrognathia concomitancy with asymmetric dento-maxillofacial deformity.%目的:探讨牵引成骨技术联合正颌正畸治疗重度小下颌伴偏颌畸形患者下颌骨严重发育不足及咬合关系紊乱的疗效。方法:对2例继发于儿童时期颞下颌关节损伤的小下颌伴偏颌畸形患者采用牵张

  13. 75 FR 2510 - Procurement List; Corrections

    Science.gov (United States)

    2010-01-15

    ... PEOPLE WHO ARE BLIND OR SEVERELY DISABLED Procurement List; Corrections AGENCY: Committee for Purchase... published by the Committee in proposing to add to and delete from the Procurement List a product and... adding services to and deleting from the Procurement List products and services on January 11, 2010...

  14. Vertical orbital dystopia--surgical correction.

    Science.gov (United States)

    Edgerton, M T; Jane, J A

    1981-02-01

    The surgical correction of vertical malpositions of the human eye has been made relatively safe and reliable by recent surgical techniques. The authors define this condition as vertical orbital dystopia and review the etiology of this deformity in 38 recent consecutive cases that were surgically treated at the Craniofacial Anomalies Center of The University of Virginia. Some new and useful tests are described that are of value to the plastic surgeon in analysis of the facial deformity and in planning the appropriate surgical procedure to correct the vertical dystopia of one or both eyes. Several cases are illustrated that describe the principal surgical methods of moving the eye up or down without loss of vision. The vertical eye shifts in this series have been in the range of 2 to 3 mm to over 22 mm. No loss of vision was produced by these corrections. The most common difficulties and complications of orbital dystopia corrections are described. The implications of this type of surgery in terms of visual physiology are suggested. The authors conclude that surgical correction of vertical orbital dystopias is possible, safe, and rewarding to the patients. However, they advise that the correction is best performed in young children and by a specially trained team of plastic surgeons, neurosurgeons, and ophthalmologists.

  15. Chicago aberration correction work

    Energy Technology Data Exchange (ETDEWEB)

    Beck, V.D., E-mail: vnlbeck@earthlink.net [1 Hobby Drive, Ridgefield, CT 06877-01922 (United States)

    2012-12-15

    The author describes from his personal involvement the many improvements to electron microscopy Albert Crewe and his group brought by minimizing the effects of aberrations. The Butler gun was developed to minimize aperture aberrations in a field emission electron gun. In the 1960s, Crewe anticipated using a spherical aberration corrector based on Scherzer's design. Since the tolerances could not be met mechanically, a method of moving the center of the octopoles electrically was developed by adding lower order multipole fields. Because the corrector was located about 15 cm ahead of the objective lens, combination aberrations would arise with the objective lens. This fifth order aberration would then limit the aperture of the microscope. The transformation of the off axis aberration coefficients of a round lens was developed and a means to cancel anisotropic coma was developed. A new method of generating negative spherical aberration was invented using the combination aberrations of hexapoles. Extensions of this technique to higher order aberrations were developed. An electrostatic electron mirror was invented, which allows the cancellation of primary spherical aberration and first order chromatic aberration. A reduction of chromatic aberration by two orders of magnitude was demonstrated using such a system. -- Highlights: Black-Right-Pointing-Pointer Crewe and his group made significant advances in aberration correction and reduction. Black-Right-Pointing-Pointer A deeper understanding of the quadrupole octopole corrector was developed. Black-Right-Pointing-Pointer A scheme to correct spherical aberration using hexapoles was developed. Black-Right-Pointing-Pointer Chromatic aberration was corrected using a uniform field mirror.

  16. HOW CORRECTION CAN MOTIVATE LEARNING

    Institute of Scientific and Technical Information of China (English)

    1996-01-01

    IntroductionMistakes and their correction generally follow one another in the language classroom.Most teachersthink that correction is a necessary part of teaching;while most students agree that making mistakesis a necessary part of learning.Although both teachers and students maintain that correction andmistakes are necessary,we often find that some correction helps students’ learning and some does not.Correction can make students lose confidence and interest in learning.In order to try and find outmore about why this happens I surveyed students attitudes towards mistakes and correction.

  17. Experimental repetitive quantum error correction.

    Science.gov (United States)

    Schindler, Philipp; Barreiro, Julio T; Monz, Thomas; Nebendahl, Volckmar; Nigg, Daniel; Chwalla, Michael; Hennrich, Markus; Blatt, Rainer

    2011-05-27

    The computational potential of a quantum processor can only be unleashed if errors during a quantum computation can be controlled and corrected for. Quantum error correction works if imperfections of quantum gate operations and measurements are below a certain threshold and corrections can be applied repeatedly. We implement multiple quantum error correction cycles for phase-flip errors on qubits encoded with trapped ions. Errors are corrected by a quantum-feedback algorithm using high-fidelity gate operations and a reset technique for the auxiliary qubits. Up to three consecutive correction cycles are realized, and the behavior of the algorithm for different noise environments is analyzed.

  18. Calculating correct compilers

    DEFF Research Database (Denmark)

    Bahr, Patrick; Hutton, Graham

    2015-01-01

    In this article, we present a new approach to the problem of calculating compilers. In particular, we develop a simple but general technique that allows us to derive correct compilers from high-level semantics by systematic calculation, with all details of the implementation of the compilers...... falling naturally out of the calculation process. Our approach is based upon the use of standard equational reasoning techniques, and has been applied to calculate compilers for a wide range of language features and their combination, including arithmetic expressions, exceptions, state, various forms...

  19. [Correction of hypospadias].

    Science.gov (United States)

    Bianchi, M

    1998-12-01

    A thorough evaluation of both urethral and penile malformation are mandatory for the choice of the best surgical treatment of patients with hypospadias. The site and the size of the urethral meatus, the presence of a chordee and of a velamentous distal urethra must be carefully assessed. In distal (glandular and coronal) hypospadias, the meatal advancement with glanduloplasty is the treatment of choice. In proximal hypospadias with chordee, the transverse preputial island flap according to the Duckett's technique allows a one-stage hypospadias repair. The awareness of the possible psychologic impact of genital malformations in childhood recommends an early correction of hypospadias, if possible during the first year of life.

  20. [Correction of paralytic lagophthalmos].

    Science.gov (United States)

    Iskusnykh, N S; Grusha, Y O

    2015-01-01

    Current options for correction of paralytic lagophthalmos are either temporary (external eyelid weight placement, hyaluronic acid gel or botulinum toxin A injection) or permanent (various procedures for narrowing of the palpebral fissure, upper eyelid weights or spring implantation). Neuroplastic surgery (cross-facial nerve grafting, nerve anastomoses) and muscle transposition surgery is not effective enough. The majority of elderly and medically compromised patients should not be considered for such complicated and long procedures. Upper eyelid weight implantation thus appears the most reliable and simple treatment.

  1. 跳跃式经椎弓根椎体截骨术矫治强直性脊柱炎重度后凸畸形的疗效%Clinical efficacies of skipping two-level transpedicular wedge osteotomy for correction of severe kyphosis in ankylosing spondylitis

    Institute of Scientific and Technical Information of China (English)

    宋若先; 张永刚; 张雪松; 毛克亚; 郑国权; 王岩

    2012-01-01

    目的 探讨跳跃式经椎弓根双脊椎截骨术矫治强直性脊柱炎重度后凸畸形的临床效果.方法 2003年1月至2009年12月对解放军总医院骨科收治的38例颌眉角或脊柱整体后凸角>70°的强直性脊柱炎重度后凸畸形患者,行后路跳跃式经椎弓根双脊椎截骨矫形内固定术.术前测量脊柱整体后凸角、胸腰段后凸角、腰椎前凸角及颌眉角与躯干矢状位失平衡距离,根据后凸畸形的特点,参考正常脊柱生理曲度与力线特点,分配截骨部位与角度,并在计算机上模拟截骨确认.观察术后各指标改善情况,并评价治疗满意度.结果 手术时间平均309 min,出血量平均2050 ml.脊柱整体后凸角、胸腰段后凸角、腰椎前凸角分别由术前(101.0±21.3)°、(45.2±13.6)°、(-28.2±23.3)°改善至术后(26.0±12.1)°、(2.8±11.6)°、(28.9±13.3)°;颌眉角由术前(79.4±15.9)°矫正到术后(13.6±10.9)°;矢状面失平衡距离由术前(49±13)cm,矫正到术后的(15±7)cm,差异均有统计学意义(均P<0.01).术后患者均能平视、直立行走及仰卧睡眠.平均随访32个月(24 ~78个月),截骨部位愈合良好,全部病例无矫正度丢失及内置物失败,SRS-22评分由术前平均1.8分改善到术后4.2分,疗效满意.结论 跳跃式经椎弓根双脊椎截骨矫形内固定术可有效矫正强直性脊柱炎重度后凸畸形,临床效果满意.%Objective To explore the clinical efficacies of skipping two-level transpedicular wedge osteotomy in the correction of severe kyphotic deformity in ankylosing spondylitis (AS).Methods From January 2003 to December 2009,a total of 38 consecutive patients with AS and severe kyphosis ( chin-brow vertical angle (CBVA) or global thoraco-lumbar kyphosis angle (TLKA) over 70°) undergoing skipping two-level transpedicular wedge osteotomy at the Department of Orthopedics of Chinese PLA General Hospital were reviewed retrospectively.There were 32 males and 6

  2. Using Online Annotations to Support Error Correction and Corrective Feedback

    Science.gov (United States)

    Yeh, Shiou-Wen; Lo, Jia-Jiunn

    2009-01-01

    Giving feedback on second language (L2) writing is a challenging task. This research proposed an interactive environment for error correction and corrective feedback. First, we developed an online corrective feedback and error analysis system called "Online Annotator for EFL Writing". The system consisted of five facilities: Document Maker,…

  3. Radiative corrections to neutralino annihilation. Recent developments

    Energy Technology Data Exchange (ETDEWEB)

    Herrmann, Bjoern

    2010-11-15

    Evaluating the relic density of dark matter is an interesting possibility to constrain the parameter space of new physics models. However, this calculation is affected by several sources of uncertainty. On the particle physics side, considerable progress has been made in the recent years concerning the calculation of the annihilation cross-section of dark matter, which is needed in this context. In particular, within the Minimal Supersymmetric Standard Model, the theoretical uncertainty has been reduced through the calculation of loop corrections. The present contribution gives an overview over the achievements that have been made in QCD corrections to neutralino pair annihilation. The numerical impact is illustrated for a few examples. (orig.)

  4. TOPOGRAPHIC CORRECTION OF ETM IMAGES BASED ON SMOOTHED TERRAIN

    Institute of Scientific and Technical Information of China (English)

    Jiang Kang; Zhao Yongchao; Geng Xiurui; Tang Hairong

    2012-01-01

    A new empirical topographic correction method is proposed in this paper.The main idea of the new method is smoothing the slope angle of terrain in the first place and then performing the cosine correction based on the smoothed terrain.A comparison is conducted among the new method and several other common methods using Landsat-7 ETM+ data.Visual analysis and statistical analysis are adopted to assess the performance of these methods from two aspects:overcorrection,homogeneity within a land cover class.Comparison results indicate that the new method is superior to the cosine correction,Gamma correction,Sun-Canopy-Sensor correction,and Minnaert correction.Compared with common methods,the proposed one can eliminate overcorrection better and is an effective topographic correction method.

  5. 78 FR 34245 - Miscellaneous Corrections

    Science.gov (United States)

    2013-06-07

    ... Federal Regulations is sold by the Superintendent of Documents. #0;Prices of new books are listed in the... office, correcting and adding missing cross-references, correcting grammatical errors, revising language... the name of its human capital office, correcting and adding missing cross-references,...

  6. Power corrections, renormalons and resummation

    Energy Technology Data Exchange (ETDEWEB)

    Beneke, M.

    1996-08-01

    I briefly review three topics of recent interest concerning power corrections, renormalons and Sudakov resummation: (a) 1/Q corrections to event shape observables in e(+)e(-) annihilation, (b) power corrections in Drell-Yan production and (c) factorial divergences that arise in resummation of large infrared (Sudakov) logarithms in moment or `real` space.

  7. Radiation camera motion correction system

    Science.gov (United States)

    Hoffer, P.B.

    1973-12-18

    The device determines the ratio of the intensity of radiation received by a radiation camera from two separate portions of the object. A correction signal is developed to maintain this ratio at a substantially constant value and this correction signal is combined with the camera signal to correct for object motion. (Official Gazette)

  8. 75 FR 16516 - Dates Correction

    Science.gov (United States)

    2010-04-01

    ... From the Federal Register Online via the Government Publishing Office ] NATIONAL ARCHIVES AND RECORDS ADMINISTRATION Office of the Federal Register Dates Correction Correction In the Notices section... through 15499, the date at the top of each page is corrected to read ``Monday, March 29, 2010''....

  9. Cutting Cakes Correctly

    CERN Document Server

    Hill, Theodore P

    2008-01-01

    Without additional hypotheses, Proposition 7.1 in Brams and Taylor's book "Fair Division" (Cambridge University Press, 1996) is false, as are several related Pareto-optimality theorems of Brams, Jones and Klamler in their 2006 cake-cutting paper.

  10. Infinite-degree-corrected stochastic block model

    DEFF Research Database (Denmark)

    Herlau, Tue; Schmidt, Mikkel Nørgaard; Mørup, Morten

    2014-01-01

    In stochastic block models, which are among the most prominent statistical models for cluster analysis of complex networks, clusters are defined as groups of nodes with statistically similar link probabilities within and between groups. A recent extension by Karrer and Newman [Karrer and Newman......, Phys. Rev. E 83, 016107 (2011)] incorporates a node degree correction to model degree heterogeneity within each group. Although this demonstrably leads to better performance on several networks, it is not obvious whether modeling node degree is always appropriate or necessary. We formulate the degree...... corrected stochastic block model as a nonparametric Bayesian model, incorporating a parameter to control the amount of degree correction that can then be inferred from data. Additionally, our formulation yields principled ways of inferring the number of groups as well as predicting missing links...

  11. Anomaly corrected heterotic horizons

    Science.gov (United States)

    Fontanella, A.; Gutowski, J. B.; Papadopoulos, G.

    2016-10-01

    We consider supersymmetric near-horizon geometries in heterotic supergravity up to two loop order in sigma model perturbation theory. We identify the conditions for the horizons to admit enhancement of supersymmetry. We show that solutions which undergo supersymmetry enhancement exhibit an {s}{l}(2,{R}) symmetry, and we describe the geometry of their horizon sections. We also prove a modified Lichnerowicz type theorem, incorporating α' corrections, which relates Killing spinors to zero modes of near-horizon Dirac operators. Furthermore, we demonstrate that there are no AdS2 solutions in heterotic supergravity up to second order in α' for which the fields are smooth and the internal space is smooth and compact without boundary. We investigate a class of nearly supersymmetric horizons, for which the gravitino Killing spinor equation is satisfied on the spatial cross sections but not the dilatino one, and present a description of their geometry.

  12. Anomaly Corrected Heterotic Horizons

    CERN Document Server

    Fontanella, A; Papadopoulos, G

    2016-01-01

    We consider supersymmetric near-horizon geometries in heterotic supergravity up to two loop order in sigma model perturbation theory. We identify the conditions for the horizons to admit enhancement of supersymmetry. We show that solutions which undergo supersymmetry enhancement exhibit an sl(2,R) symmetry, and we describe the geometry of their horizon sections. We also prove a modified Lichnerowicz type theorem, incorporating $\\alpha'$ corrections, which relates Killing spinors to zero modes of near-horizon Dirac operators. Furthermore, we demonstrate that there are no AdS2 solutions in heterotic supergravity up to second order in $\\alpha'$ for which the fields are smooth and the internal space is smooth and compact without boundary. We investigate a class of nearly supersymmetric horizons, for which the gravitino Killing spinor equation is satisfied on the spatial cross sections but not the dilatino one, and present a description of their geometry.

  13. Catalytic quantum error correction

    CERN Document Server

    Brun, T; Hsieh, M H; Brun, Todd; Devetak, Igor; Hsieh, Min-Hsiu

    2006-01-01

    We develop the theory of entanglement-assisted quantum error correcting (EAQEC) codes, a generalization of the stabilizer formalism to the setting in which the sender and receiver have access to pre-shared entanglement. Conventional stabilizer codes are equivalent to dual-containing symplectic codes. In contrast, EAQEC codes do not require the dual-containing condition, which greatly simplifies their construction. We show how any quaternary classical code can be made into a EAQEC code. In particular, efficient modern codes, like LDPC codes, which attain the Shannon capacity, can be made into EAQEC codes attaining the hashing bound. In a quantum computation setting, EAQEC codes give rise to catalytic quantum codes which maintain a region of inherited noiseless qubits. We also give an alternative construction of EAQEC codes by making classical entanglement assisted codes coherent.

  14. Iatrogenic diplopia [corrected].

    Science.gov (United States)

    González-Martín-Moro, Julio; González-López, Julio José; Sales-Sanz, Marco; Sales-Sanz, Andrea; González-Martín-Moro, Javier; Gómez-Sanz, Fernando; González-Manrique, Mar; Pilo-de-la-Fuente, Belén; García-Leal, Roberto

    2014-08-01

    Diplopia is a very disturbing condition that has been reported as a complication of several surgical procedures. The following review aims to identify the ocular and nonocular surgical techniques more often associated with this undesirable result. Diplopia is reported as an adverse outcome of some neurosurgical procedures, dental procedures, endoscopic paranasal sinus surgery, and several ophthalmic procedures. The most common patterns and some recommendations in order to prevent and treat this frustrating outcome are also given.

  15. Height drift correction in non-raster atomic force microscopy

    NARCIS (Netherlands)

    Meyer, Travis R.; Ziegler, Dominik; Brune, Christoph; Chen, Alex; Farnham, Rodrigo; Huynh, Nen; Chang, Jen-Mei; Bertozzi, Andrea L.; Ashby, Paul D.

    2014-01-01

    We propose a novel method to detect and correct drift in non-raster scanning probe microscopy. In conventional raster scanning drift is usually corrected by subtracting a fitted polynomial from each scan line, but sample tilt or large topographic features can result in severe artifacts. Our method u

  16. Correction: Discovery and validation of breast cancer subtypes

    Directory of Open Access Journals (Sweden)

    Bukholm Ida RK

    2007-04-01

    Full Text Available Abstract Following the publication of our recent article (Kapp et al., BMC Genomics 2006, 7:231, we (the authors regrettably found several errors in the published Table 5. This correction article not only describes what makes the published Table 5 incorrect, it also presents the correct Table 5.

  17. Different partial volume correction methods lead to different conclusions

    DEFF Research Database (Denmark)

    Greve, Douglas N; Salat, David H; Bowen, Spencer L

    2016-01-01

    A cross-sectional group study of the effects of aging on brain metabolism as measured with (18)F-FDG-PET was performed using several different partial volume correction (PVC) methods: no correction (NoPVC), Meltzer (MZ), Müller-Gärtner (MG), and the symmetric geometric transfer matrix (SGTM) usin...

  18. Urethroplasty in the distal penile segment using flap for the staged correction of severe hypospadias%皮瓣法重建阴茎段尿道在重度尿道下裂分期手术中的应用

    Institute of Scientific and Technical Information of China (English)

    范志强; 刘中华; 皇甫雪军; 朱晓博; 陈国晓

    2015-01-01

    Objective To discuss the applicatioen of flap for the urethroplasty in the distal penile segment in the staged correction of severe hypospadias.Methods From Oct.2004 to Aug.2014, 25 cases with severe hypospadias were treated by staged urethroplasty for urethra reconstruction.The urethral meatus were located at peroscrotum in 4 patinets, at scrotum in 8 patients and at perineum in 13 cases.At the first stage, the urethral plate was divided and chordee was corrected.Then tubularized transverse island flap was used to prefabricate partial distal urethra.The defective urethra was repaired by using the Thiersch-Duplay principle at the second stage.Results All patients completed both stages of the operation.The follow-up duration was 6-72 months (average,24 months).In the first-stage, the modified tabularized transverse preputial island flap was performed on 10 patients, whereas the modified preputial double-faced island flap was performed on the other 15 patients.All of the prefabricated partial distal urethras had no evidence of stenosis or scarring.The result of the second-stage procedure was a complete penis with integrated urethral.All patients were satisfied with cosmetic and functional results.Neither stricture nor diverticula was observed.A good urinary stream during the urination was achieved in 19(19/ 25, 76%) patients.Five cases (5/25, 25%) developed urethrocutaneous fistula and one cases developed meatal stenosis (1/25, 4%) after the second stage repair.Conclusions Staged urethroplasty using flap is a good choice for severe hypospadias.The successful rate is relatively high with good cosmetic and functional results.%目的 探讨皮瓣法部分阴茎远段尿道成形在重度尿道下裂分期手术中的临床应用.方法 2004年10月至2014年8月,采用分期、分节段尿道重建的方法治疗25例重度尿道下裂,其中阴茎阴囊型4例,阴囊型8例,会阴型13例.一期手术行阴茎充分伸直术,同时采用横裁包皮皮瓣

  19. 人胚胎干细胞体外定向诱导分化胰岛细胞移植治疗非肥胖联合免疫缺陷糖尿病小鼠%Pancreatic islets differentiated from human embryonic stem cells correct hyperglycemia in non-obese diabetic /severe combined immunodeficient mice

    Institute of Scientific and Technical Information of China (English)

    华秀峰; 孙强; 王延伟; 丛晋; 刘芙君; 孟晓梅; 李华峰; 靳少华; 王海燕; 李建远

    2013-01-01

    目的 探讨人胚胎干细胞(hESs)体外定向诱导分化胰岛细胞移植治疗非肥胖联合免疫缺陷(NOD/SCID)糖尿病小鼠的可行性.方法 体外分四阶段诱导hESs定向分化为胰岛细胞:第一阶段,予以活化素A(activin A)、渥曼青霉素(wortmannin)诱导分化形成定型内胚层;第二阶段,予以全反式维甲酸(RA)、NOGGIN、碱性成纤维细胞生长因子(bFGF)诱导胰腺细胞定向分化;第三阶段,予以表皮生长因子(EGF)扩增胰腺祖细胞;第四阶段,予以尼克酰胺(nicotinamide)、唾液素4(exendin-4)、bFGF及骨形成蛋白(BMP4)促进胰岛细胞成熟;观察诱导各阶段细胞形态变化、免疫荧光鉴定胰十二指肠同源异型盒基因(PDX-1)、胰高糖素、胰岛素、C肽、葡萄糖转运子2(Glut-2)的表达;四阶段分化成熟的胰岛细胞体外检测胰岛素释放反应并植入链脲菌素(STZ)诱导形成的NOD/SCID糖尿病小鼠一侧附睾脂肪垫内,观察血糖变化.结果 诱导第四阶段14天时hESs出现胰高糖素荧光表达;20天时细胞出现PDX-1和C肽共表达;22天形成的成熟胰岛细胞出现Glut-2和胰岛素的阳性表达;流式鉴定胰岛素阳性细胞占17.1%,C肽阳性细胞占3.8%;体外检测有葡萄糖刺激的胰岛素释放反应.分化成熟胰岛细胞约(3~5)×106植入NOD/SCID糖尿病小鼠体内可以逆转其高血糖至少8周.结论 体外定向诱导hESs分化形成的胰岛细胞植入NOD/SCID糖尿病小鼠附睾脂肪垫内可以逆转其高血糖.%Objective To investigate whether pancreatic progenitors differentiated from human embryonic stem (hES) cells could correct hyperglycemia in non-obese diabetic(NOD)/severe combined immunodeficient(SCID) mice or not. Methods Pancreatic islets derived from hES cells line YT1 according to the optimized four-stage differentiation protocol in a chemical-defined culture system were observed. In the first stage.activin A and wortmannin were utilized to induce definitive endoderm

  20. Corrective Jaw Surgery

    Medline Plus

    Full Text Available ... which will probably include orthodontics before and after surgery, may take several years to complete. Your OMS and orthodontist understand that this is a long-term commitment for you and your family, and will try to realistically estimate the time ...

  1. Higher-Order Corrections to Timelike Jets

    Energy Technology Data Exchange (ETDEWEB)

    Giele, W.T.; /Fermilab; Kosower, D.A.; /Saclay, SPhT; Skands, P.Z.; /CERN

    2011-02-01

    We present a simple formalism for the evolution of timelike jets in which tree-level matrix element corrections can be systematically incorporated, up to arbitrary parton multiplicities and over all of phase space, in a way that exponentiates the matching corrections. The scheme is cast as a shower Markov chain which generates one single unweighted event sample, that can be passed to standard hadronization models. Remaining perturbative uncertainties are estimated by providing several alternative weight sets for the same events, at a relatively modest additional overhead. As an explicit example, we consider Z {yields} q{bar q} evolution with unpolarized, massless quarks and include several formally subleading improvements as well as matching to tree-level matrix elements through {alpha}{sub s}{sup 4}. The resulting algorithm is implemented in the publicly available VINCIA plugin to the PYTHIA8 event generator.

  2. Higher-Order Corrections to Timelike Jets

    CERN Document Server

    Giele, W T; Skands, P Z

    2011-01-01

    We present a simple formalism for the evolution of timelike jets in which tree-level matrix element corrections can be systematically incorporated, up to arbitrary parton multiplicities and over all of phase space, in a way that exponentiates the matching corrections. The scheme is cast as a shower Markov chain which generates one single unweighted event sample, that can be passed to standard hadronization models. Remaining perturbative uncertainties are estimated by providing several alternative weight sets for the same events, at a relatively modest additional overhead. As an explicit example, we consider Z -> q qbar evolution with unpolarized, massless quarks and include several formally subleading improvements as well as matching to tree-level matrix elements through alpha_s^4. The resulting algorithm is implemented in the publicly available VINCIA plugin to the PYTHIA 8 event generator.

  3. Surgical correction of truncus arteriosus in infancy.

    Science.gov (United States)

    Sullivan, H; Sulayman, R; Replogle, R; Arcilla, R A

    1976-07-01

    An 8 week old infant with severe heart failure from type 1 truncus arteriosus underwent successful corrective surgery employing the Rastelli procedure with use of deep hypothermia and total circulatory arrest. Postoperative hemodynamic studies showed complete closure of the septal defect, disappearance of truncal stenosis, but presence of mild porcine valve stenosis. This procedure is possible even in very small subjects and is preferable to palliative pulmonary arterial banding.

  4. Unpacking Corrections in Mobile Instruction

    DEFF Research Database (Denmark)

    Levin, Lena; Cromdal, Jakob; Broth, Mathias

    2017-01-01

    This article deals with the organisation of correction in mobile instructional settings. Five sets of video data (>250 h) documenting how learners were instructed to fly aeroplanes, drive cars and ride bicycles in real life traffic were examined to reveal some common features of correction...... exchanges. Through detailed multimodal analysis of participants’ actions, it is shown how instructors systematically elaborate their corrective instructions to include relevant information about the trouble and remedial action – a practice we refer to as unpacking corrections. It is proposed...... that the practice of unpacking the local particulars of corrections (i) provides for the instructional character of the interaction, and (ii) is highly sensitive to the relevant physical and mobile contingencies. These findings contribute to the existing literature on the interactional organisation of correction...

  5. Gravitational Correction to Vacuum Polarization

    CERN Document Server

    Jentschura, U D

    2015-01-01

    We consider the gravitational correction to (electronic) vacuum polarization in the presence of a gravitational background field. The Dirac propagators for the virtual fermions are modified to include the leading gravitational correction (potential term) which corresponds to a coordinate-dependent fermion mass. The mass term is assumed to be uniform over a length scale commensurate with the virtual electron-positron pair. The on-mass shell renormalization condition ensures that the gravitational correction vanishes on the mass shell of the photon, i.e., the speed of light is unaffected by the quantum field theoretical loop correction, in full agreement with the equivalence principle. Nontrivial corrections are obtained for off-shell, virtual photons. We compare our findings to other works on generalized Lorentz transformations and combined quantum-electrodynamic gravitational corrections to the speed of light which have recently appeared in the literature.

  6. Food systems in correctional settings

    DEFF Research Database (Denmark)

    Smoyer, Amy; Kjær Minke, Linda

    Food is a central component of life in correctional institutions and plays a critical role in the physical and mental health of incarcerated people and the construction of prisoners' identities and relationships. An understanding of the role of food in correctional settings and the effective...... management of food systems may improve outcomes for incarcerated people and help correctional administrators to maximize their health and safety. This report summarizes existing research on food systems in correctional settings and provides examples of food programmes in prison and remand facilities......, including a case study of food-related innovation in the Danish correctional system. It offers specific conclusions for policy-makers, administrators of correctional institutions and prison-food-service professionals, and makes proposals for future research....

  7. Correction due to finite speed of light in absolute gravimeters

    CERN Document Server

    Nagornyi, V D; Zanimonskiy, Y Y

    2010-01-01

    Correction due to finite speed of light is among the most inconsistent ones in absolute gravimetry. Formulas reported by different authors yield corrections scattered up to 8 $\\mu$Gal with no obvious reasons. The problem, though noted before, has never been studied, and nowadays the correction is rather postulated than rigorously proven. In this paper we investigate the problem from several prospectives, find the corrections for different types of absolute gravimeters, and establish relationships between different ways of implement them. The obtained results enabled us to analyze and understand the discrepancies in the results of other authors. We found that the correction derived from the Doppler effect is accountable only for $\\tfrac{2}{3}$ of the total correction due to finite speed of light, if no signal delays are considered. Another major source of inconsistency was found in the tacit use of simplified trajectory models.

  8. 经后路全脊椎切除治疗结核治愈型胸腰椎角状后凸畸形%Posterior vertebal column resection for correct severe focus-healed tubercular angular kyphosis in thoracal and lumbar spine

    Institute of Scientific and Technical Information of China (English)

    周田华; 汤逊; 苏踊跃; 王毅; 黄游; 殴校冉; 徐永清

    2014-01-01

    目的:探讨经后路全脊椎切除术治疗结核治愈型胸腰椎角状后凸畸形的有效性和安全性。方法:2008年1月~2012年1月,采用后路全脊椎切除手术治疗17例结核治愈型胸腰椎角状后凸畸形患者,男5例,女12例,年龄9~40岁,平均23.6岁。病程16~122个月,平均37.5个月,其中2例病例既往有经肋横突入路结核病灶清除手术史。病灶累及1~2个椎体8例,≥3个椎体9例。后凸畸形顶椎位于胸椎(T5~T10)5例,胸腰段(T11~L1)10例,腰椎2例。术前Cobb角60°~90°者13例,>90°者4例,最大为102°,平均81.3°±12.8°。所有患者均可见驼背畸形,无低热、盗汗等结核中毒症状。术前、术后和末次随访时分别测量患者后凸Cobb角,并评估神经功能ASIA 分级。结果:本组病例手术均顺利完成,手术时间330~450min,平均364min;术中出血量1600~2500ml,平均2218ml;术中输血1000~2000ml,平均1863ml。术中2例患者出现胸膜破裂,及时予以修补,经观察未发现气胸或血气胸。所有病例术后伤口均一期愈合,无窦道形成,内固定未见松动,未见神经功能加重者。术后Cobb角矫正至10°~28°,平均17.3°±3.6°,较术前明显改善(P0.05),但与术前相比仍有明显改善(P<0.01);植骨融合时间5~9个月,平均6.5个月;术前神经功能为D级的5例患者,4例恢复到E级,另1例仍为D级,但后凸畸形及局部疼痛已明显好转。结论:经后路全脊椎切除可安全有效地用于结核治愈型胸腰椎角状后凸畸形的矫形手术。%Objectives: To evaluate the safety and efficacy of posterior vertebral column resection in treat-ment for severe focus-healed tubercular angular kyphosis in thoracal and lumbar spine. Methods: From Jan-uary 2008 to January 2012, 17 patients with severe focus-healed tubercular angular kyphosis in thoracal and lumbar spine underwent

  9. Processor register error correction management

    Science.gov (United States)

    Bose, Pradip; Cher, Chen-Yong; Gupta, Meeta S.

    2016-12-27

    Processor register protection management is disclosed. In embodiments, a method of processor register protection management can include determining a sensitive logical register for executable code generated by a compiler, generating an error-correction table identifying the sensitive logical register, and storing the error-correction table in a memory accessible by a processor. The processor can be configured to generate a duplicate register of the sensitive logical register identified by the error-correction table.

  10. Comparison of Topographic Correction Methods

    Directory of Open Access Journals (Sweden)

    Rudolf Richter

    2009-07-01

    Full Text Available A comparison of topographic correction methods is conducted for Landsat-5 TM, Landsat-7 ETM+, and SPOT-5 imagery from different geographic areas and seasons. Three successful and known methods are compared: the semi-empirical C correction, the Gamma correction depending on the incidence and exitance angles, and a modified Minnaert approach. In the majority of cases the modified Minnaert approach performed best, but no method is superior in all cases.

  11. Food systems in correctional settings

    DEFF Research Database (Denmark)

    Smoyer, Amy; Kjær Minke, Linda

    Food is a central component of life in correctional institutions and plays a critical role in the physical and mental health of incarcerated people and the construction of prisoners' identities and relationships. An understanding of the role of food in correctional settings and the effective mana......, including a case study of food-related innovation in the Danish correctional system. It offers specific conclusions for policy-makers, administrators of correctional institutions and prison-food-service professionals, and makes proposals for future research....

  12. Towards self-correcting quantum memories

    Science.gov (United States)

    Michnicki, Kamil

    This thesis presents a model of self-correcting quantum memories where quantum states are encoded using topological stabilizer codes and error correction is done using local measurements and local dynamics. Quantum noise poses a practical barrier to developing quantum memories. This thesis explores two types of models for suppressing noise. One model suppresses thermalizing noise energetically by engineering a Hamiltonian with a high energy barrier between code states. Thermalizing dynamics are modeled phenomenologically as a Markovian quantum master equation with only local generators. The second model suppresses stochastic noise with a cellular automaton that performs error correction using syndrome measurements and a local update rule. Several ways of visualizing and thinking about stabilizer codes are presented in order to design ones that have a high energy barrier: the non-local Ising model, the quasi-particle graph and the theory of welded stabilizer codes. I develop the theory of welded stabilizer codes and use it to construct a code with the highest known energy barrier in 3-d for spin Hamiltonians: the welded solid code. Although the welded solid code is not fully self correcting, it has some self correcting properties. It has an increased memory lifetime for an increased system size up to a temperature dependent maximum. One strategy for increasing the energy barrier is by mediating an interaction with an external system. I prove a no-go theorem for a class of Hamiltonians where the interaction terms are local, of bounded strength and commute with the stabilizer group. Under these conditions the energy barrier can only be increased by a multiplicative constant. I develop cellular automaton to do error correction on a state encoded using the toric code. The numerical evidence indicates that while there is no threshold, the model can extend the memory lifetime significantly. While of less theoretical importance, this could be practical for real

  13. New orbit correction method uniting global and local orbit corrections

    Science.gov (United States)

    Nakamura, N.; Takaki, H.; Sakai, H.; Satoh, M.; Harada, K.; Kamiya, Y.

    2006-01-01

    A new orbit correction method, called the eigenvector method with constraints (EVC), is proposed and formulated to unite global and local orbit corrections for ring accelerators, especially synchrotron radiation(SR) sources. The EVC can exactly correct the beam positions at arbitrarily selected ring positions such as light source points, simultaneously reducing closed orbit distortion (COD) around the whole ring. Computer simulations clearly demonstrate these features of the EVC for both cases of the Super-SOR light source and the Advanced Light Source (ALS) that have typical structures of high-brilliance SR sources. In addition, the effects of errors in beam position monitor (BPM) reading and steering magnet setting on the orbit correction are analytically expressed and also compared with the computer simulations. Simulation results show that the EVC is very effective and useful for orbit correction and beam position stabilization in SR sources.

  14. Corrective Action Decision Document/ Corrective Action Plan for Corrective Action Unit 443: Central Nevada Test Area-Subsurface Central Nevada Test Area, Nevada, Rev. No. 0

    Energy Technology Data Exchange (ETDEWEB)

    Susan Evans

    2004-11-01

    This Corrective Action Decision Document/Corrective Action Plan (CADD/CAP) has been prepared for the subsurface at the Central Nevada Test Area (CNTA) Corrective Action Unit (CAU) 443, CNTA - Subsurface, Nevada, in accordance with the ''Federal Facility Agreement and Consent Order'' (FFACO) (1996). CAU 443 is located in Hot Creek Valley in Nye County, Nevada, north of U.S. Highway 6, about 48 kilometers north of Warm Springs, Nevada. The CADD/CAP combines the decision document (CADD) with the corrective action plan (CAP) and provides or references the specific information necessary to recommend corrective actions for the UC-1 Cavity (Corrective Action Site 58-57-001) at CAU 443, as provided in the FFACO. The purpose of the CADD portion of the document (Section 1.0 to Section 4.0) is to identify and provide a rationale for the selection of a recommended corrective action alternative for the subsurface at CNTA. To achieve this, the following tasks were required: (1) Develop corrective action objectives; (2) Identify corrective action alternative screening criteria; (3) Develop corrective action alternatives; (4) Perform detailed and comparative evaluations of the corrective action alternatives in relation to the corrective action objectives and screening criteria; and (5) Recommend a preferred corrective action alternative for the subsurface at CNTA. A Corrective Action Investigation (CAI) was performed in several stages from 1999 to 2003, as set forth in the ''Corrective Action Investigation Plan for the Central Nevada Test Area Subsurface Sites (Corrective Action Unit No. 443)'' (DOE/NV, 1999). Groundwater modeling was the primary activity of the CAI. Three phases of modeling were conducted for the Faultless underground nuclear test. The first involved the gathering and interpretation of geologic and hydrogeologic data into a three-dimensional numerical model of groundwater flow, and use of the output of the flow model for a

  15. Exemplar-based human action pose correction.

    Science.gov (United States)

    Shen, Wei; Deng, Ke; Bai, Xiang; Leyvand, Tommer; Guo, Baining; Tu, Zhuowen

    2014-07-01

    The launch of Xbox Kinect has built a very successful computer vision product and made a big impact on the gaming industry. This sheds lights onto a wide variety of potential applications related to action recognition. The accurate estimation of human poses from the depth image is universally a critical step. However, existing pose estimation systems exhibit failures when facing severe occlusion. In this paper, we propose an exemplar-based method to learn to correct the initially estimated poses. We learn an inhomogeneous systematic bias by leveraging the exemplar information within a specific human action domain. Furthermore, as an extension, we learn a conditional model by incorporation of pose tags to further increase the accuracy of pose correction. In the experiments, significant improvements on both joint-based skeleton correction and tag prediction are observed over the contemporary approaches, including what is delivered by the current Kinect system. Our experiments for the facial landmark correction also illustrate that our algorithm can improve the accuracy of other detection/estimation systems.

  16. The new Sunspot Number: assembling all corrections

    CERN Document Server

    Frédéric,; Lefèvre, Laure

    2015-01-01

    The Sunspot Number, created by R.Wolf in 1849, provides a direct long-term record of solar activity from 1700 to the present. In spite of its central role in multiple studies of the solar dynamo and of the past Sun-Earth relations, it was never submitted to a global critical revision. However, various discrepancies with other solar indices recently motivated a full re-calibration of this series. Based on various diagnostics and corrections established in the framework of several Sunspot Number Workshops and described in Clette et al. 2014, we assembled all corrections in order to produce a new standard version of this reference time series. In this paper, we explain the three main corrections and the criteria used to choose a final optimal version of each correction factor or function, given the available information and published analyses. We then discuss the good agreement obtained with the Group sunspot Number derived from a recent reconstruction. Among the implications emerging from this re-calibrated ser...

  17. Unpacking Corrections in Mobile Instruction

    DEFF Research Database (Denmark)

    Levin, Lene; Broth, Mathias; Cromdal, Jakob

    2017-01-01

    This article deals with the organisation of correction in mobile instructional settings. Five sets of video data (>250 h) documenting how learners were instructed to fly aeroplanes, drive cars and ride bicycles in real life traffic were examined to reveal some common features of correction exchan...

  18. Feature Referenced Error Correction Apparatus.

    Science.gov (United States)

    A feature referenced error correction apparatus utilizing the multiple images of the interstage level image format to compensate for positional...images and by the generation of an error correction signal in response to the sub-frame registration errors. (Author)

  19. [Severe asthma--where are we today?].

    Science.gov (United States)

    von Bülow, Anna; Backer, Vibeke; Porsbjerg, Celeste

    2014-01-13

    Severe asthma is defined by persistent symptoms and frequent exacerbations despite intensive asthma therapy. The prevalence is estimated to be 5-10% of all asthmatics. Severe asthma is responsible for a major burden of illness including low quality of life and a disproportionate use of health-care resources. The clinical assessment of severe asthma must include verification of the correct diagnosis, adherence to medication, excluding differential diagnosis and identification and treatment of aggravating co-morbidities and trigger factors.

  20. Generalised geometry for string corrections

    CERN Document Server

    Coimbra, André; Triendl, Hagen; Waldram, Daniel

    2014-01-01

    We present a general formalism for incorporating the string corrections in generalised geometry, which necessitates the extension of the generalised tangent bundle. Not only are such extensions obstructed, string symmetries and the existence of a well-defined effective action require a precise choice of the (generalised) connection. The action takes a universal form given by a generalised Lichnerowitz--Bismut theorem. As examples of this construction we discuss the corrections linear in $\\alpha'$ in heterotic strings and the absence of such corrections for type II theories.

  1. Management of severe perioperative bleeding

    DEFF Research Database (Denmark)

    Kozek-Langenecker, Sibylle A; Afshari, Arash; Albaladejo, Pierre

    2013-01-01

    The aims of severe perioperative bleeding management are three-fold. First, preoperative identification by anamesis and laboratory testing of those patients for whom the perioperative bleeding risk may be increased. Second, implementation of strategies for correcting preoperative anaemia......-sectional surveys were selected. At the suggestion of the ESA Guideline Committee, the Scottish Intercollegiate Guidelines Network (SIGN) grading system was initially used to assess the level of evidence and to grade recommendations. During the process of guideline development, the official position of the ESA...

  2. Spelling Correction in Agglutinative Languages

    CERN Document Server

    Oflazer, K

    1994-01-01

    This paper presents an approach to spelling correction in agglutinative languages that is based on two-level morphology and a dynamic programming based search algorithm. Spelling correction in agglutinative languages is significantly different than in languages like English. The concept of a word in such languages is much wider that the entries found in a dictionary, owing to {}~productive word formation by derivational and inflectional affixations. After an overview of certain issues and relevant mathematical preliminaries, we formally present the problem and our solution. We then present results from our experiments with spelling correction in Turkish, a Ural--Altaic agglutinative language. Our results indicate that we can find the intended correct word in 95\\% of the cases and offer it as the first candidate in 74\\% of the cases, when the edit distance is 1.

  3. Dispersion based beam tilt correction

    CERN Document Server

    Guetg, Marc W; Prat, Eduard; Reiche, Sven

    2013-01-01

    In Free Electron Lasers (FEL), a transverse centroid misalignment of longitudinal slices in an electron bunch reduces the effective overlap between radiation field and electron bunch and therefore the FEL performance. The dominant sources of slice misalignments for FELs are the incoherent and coherent synchrotron radiation within bunch compressors as well as transverse wake fields in the accelerating cavities. This is of particular importance for over-compression which is required for one of the key operation modes for the SwissFEL planned at the Paul Scherrer Institute. The centroid shift is corrected using corrector magnets in dispersive sections, e.g. the bunch compressors. First and second order corrections are achieved by pairs of sextupole and quadrupole magnets in the horizontal plane while skew quadrupoles correct to first order in the vertical plane. Simulations and measurements at the SwissFEL Injector Test Facility are done to investigate the proposed correction scheme for SwissFEL. This paper pres...

  4. General correcting formula of forecasting?

    OpenAIRE

    2009-01-01

    A general correcting formula of forecasting (as a framework for long-use and standardized forecasts) is proposed. The formula provides new forecasting resources and areas of application including economic forecasting.

  5. Quantum corrections for Boltzmann equation

    Institute of Scientific and Technical Information of China (English)

    M.; Levy; PETER

    2008-01-01

    We present the lowest order quantum correction to the semiclassical Boltzmann distribution function,and the equation satisfied by this correction is given. Our equation for the quantum correction is obtained from the conventional quantum Boltzmann equation by explicitly expressing the Planck constant in the gradient approximation,and the quantum Wigner distribution function is expanded in pow-ers of Planck constant,too. The negative quantum correlation in the Wigner dis-tribution function which is just the quantum correction terms is naturally singled out,thus obviating the need for the Husimi’s coarse grain averaging that is usually done to remove the negative quantum part of the Wigner distribution function. We also discuss the classical limit of quantum thermodynamic entropy in the above framework.

  6. General correcting formula of forecasting?

    OpenAIRE

    Harin, Alexander

    2009-01-01

    A general correcting formula of forecasting (as a framework for long-use and standardized forecasts) is proposed. The formula provides new forecasting resources and areas of application including economic forecasting.

  7. [Treatment of severe Rhesus erythroblastosis].

    Science.gov (United States)

    Bichler, A; Frisch, H

    1977-01-01

    Report about the management of cases of severe Rhesus erythroblastosis. One case is specially discussed because of it's actuality. This was a patient with severe Rh-sensitization (OOD at 450 mm from the beginning of the 30th week of gestation in zone III according to Liley). Because of the haemolytic disease and the chronic fetal distress the Caesarean section was already performed in the 32nd week of gestation after Betamethason treatment of the mother. The Lecithin-Sphingomyelin (L/S) ratio in the amniotic fluid as a criterium of fetal lung maturity raised almost twicefold (from 0.9 to 1.6) after Cortison treatment. The intensive care (assisted ventilation with PEEP, correction of the acidosis and transfusion of packed red cells) of the severely anaemic (Hb 3.5 g%, Hk 15 vol.%) and hydropic newborn was already started in the delivery room. The newborn developed no RDS and was discharged healthy. With reference to this and other cases the management of severe Rh-sensitization before the 34th week of gestation is discussed. Premature infants are mainly susceptable to the development of a Respiratory Distress syndrome (RDS). After antepartum Cortison treatment for prevention of an RDS the date of confinement should be arranged earlier. The value of an early Caesarian section after antepartum Glucocorticoid treatment as compared to the application of intrauterine transfusions in cases of severe erythroblastosis is discussed. It is also reported about recent methods of treatment of severe conditions of hydrops fetalis.

  8. Error correcting coding for OTN

    DEFF Research Database (Denmark)

    Justesen, Jørn; Larsen, Knud J.; Pedersen, Lars A.

    2010-01-01

    Forward error correction codes for 100 Gb/s optical transmission are currently receiving much attention from transport network operators and technology providers. We discuss the performance of hard decision decoding using product type codes that cover a single OTN frame or a small number...... of such frames. In particular we argue that a three-error correcting BCH is the best choice for the component code in such systems....

  9. Radiative corrections to Bose condensation

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez, A. (Academia de Ciencias de Cuba, La Habana. Inst. de Matematica, Cibernetica y Computacion)

    1985-04-01

    The Bose condensation of the scalar field in a theory behaving in the Coleman-Weinberg mode is considered. The effective potential of the model is computed within the semiclassical approximation in a dimensional regularization scheme. Radiative corrections are shown to introduce certain ..mu..-dependent ultraviolet divergences in the effective potential coming from the Many-Particle theory. The weight of radiative corrections in the dynamics of the system is strongly modified by the charge density.

  10. Proving Program Correctness. Volume V.

    Science.gov (United States)

    1981-11-01

    Task 2. Proving Program Correctness (P.I.: J.C. Reynolds). This group is working towards programming languaje designs which increase the probability...certain syntactic difficulties: the natural abstract syntax is ambiguous, and syntactic correctness is violated by certain beta reductions. 3 - These...concept of a functor to express a-sp- priat : restrictions on implicit conversion functions. In a similar v-’.1n, we can use the concept of a natural

  11. Quantum error correction for beginners.

    Science.gov (United States)

    Devitt, Simon J; Munro, William J; Nemoto, Kae

    2013-07-01

    Quantum error correction (QEC) and fault-tolerant quantum computation represent one of the most vital theoretical aspects of quantum information processing. It was well known from the early developments of this exciting field that the fragility of coherent quantum systems would be a catastrophic obstacle to the development of large-scale quantum computers. The introduction of quantum error correction in 1995 showed that active techniques could be employed to mitigate this fatal problem. However, quantum error correction and fault-tolerant computation is now a much larger field and many new codes, techniques, and methodologies have been developed to implement error correction for large-scale quantum algorithms. In response, we have attempted to summarize the basic aspects of quantum error correction and fault-tolerance, not as a detailed guide, but rather as a basic introduction. The development in this area has been so pronounced that many in the field of quantum information, specifically researchers who are new to quantum information or people focused on the many other important issues in quantum computation, have found it difficult to keep up with the general formalisms and methodologies employed in this area. Rather than introducing these concepts from a rigorous mathematical and computer science framework, we instead examine error correction and fault-tolerance largely through detailed examples, which are more relevant to experimentalists today and in the near future.

  12. Resistor array infrared nonuniformity correction based on sparse grid

    Science.gov (United States)

    He, Xudong; Qiu, Jiang; Zhang, Qiao; Du, Huijie; Zhao, Hongming

    2013-10-01

    Resistor array plays a vital role in emulation of the IR control and guide system. However, its serious nonuniformity confines the range of its application. Therefore, in order to obtain an available IR image, nonuniformity correction (NUC) is necessary. The traditional method is sparse grid and flood which only take the array's nonuniformity into account. In this paper we present an improved sparse grid method which considers the whole system which affects the array's nonuniformity by dividing the NUC process into different gray levels. In each gray level, we can take two points or several points to calculate the nonuniformity of every block which is divided before correction. After that, we can have several characteristic curves which will be operated with curve fitting. By this means, we will correct the nonuniformity. At last, through the experiment of a number of images, we find the residual nonuniformity associated with random noise is about 0.2% after the correction.

  13. Corrective Feedback Strategies Used in Chinese Senior Middle School EFL Classes

    Institute of Scientific and Technical Information of China (English)

    杜娟

    2015-01-01

    Error correction,part of teacher talk,plays a significant role in the classroom interaction.This thesis discusses the current error correction practice in Chinese senior middle school English classes and then proposes several approaches to improve English teachers' corrective feedback strategies.

  14. Corrective Feedback Strategies Used in Chinese Senior Middle School EFL Classes

    Institute of Scientific and Technical Information of China (English)

    杜娟

    2015-01-01

    Error correction,part of teacher talk,plays a significant role in the classroom interaction.This thesis discusses the current error correction practice in Chinese senior middle school English classes and then proposes several approaches to improve English teachers’ corrective feedback strategies.

  15. Updating quasar bolometric luminosity corrections - III. [O iii] bolometric corrections

    Science.gov (United States)

    Pennell, Alison; Runnoe, Jessie C.; Brotherton, M. S.

    2017-06-01

    We present quasar bolometric corrections using the [O III] λ 5007 narrow emission line luminosity based on the detailed spectral energy distributions of 53 bright quasars at low to moderate redshift (0.0345 diversity, introduces scatter into the L_{[O III]}-Liso relationship. We found that the {[O III]} bolometric correction can be significantly improved by adding a term including the equivalent width ratio R_{Fe II} ≡ EW_{{Fe II}}/EW_{Hβ }, which is an EV1 indicator. Inclusion of R_{Fe II} in predicting Liso is significant at nearly the 3σ level and reduces the scatter and systematic offset of the luminosity residuals. Typically, {[O III]} bolometric corrections are adopted for Type 2 sources where the quasar continuum is not observed and in these cases, R_{Fe II} cannot be measured. We searched for an alternative measure of EV1 that could be measured in the optical spectra of Type 2 sources but were unable to identify one. Thus, the main contribution of this work is to present an improved {[O III]} bolometric correction based on measured bolometric luminosities and highlight the EV1 dependence of the correction in Type 1 sources.

  16. Improvements for Optics Measurement and Corrections software

    CERN Document Server

    Bach, T

    2013-01-01

    This note presents the improvements for the OMC software during a 14 month technical student internship at CERN. The goal of the work was to improve existing software in terms of maintainability, features and performance. Significant improvements in stability, speed and overall development process were reached. The main software, a Java GUI at the LHC CCC, run for months without noteworthy problems. The overall running time of the software chain used for optics corrections was reduced from nearly half an hour to around two minutes. This was the result of analysing and improving several involved programs and algorithms.

  17. Correction of spin diffusion during iterative automated NOE assignment.

    Science.gov (United States)

    Linge, Jens P; Habeck, Michael; Rieping, Wolfgang; Nilges, Michael

    2004-04-01

    Indirect magnetization transfer increases the observed nuclear Overhauser enhancement (NOE) between two protons in many cases, leading to an underestimation of target distances. Wider distance bounds are necessary to account for this error. However, this leads to a loss of information and may reduce the quality of the structures generated from the inter-proton distances. Although several methods for spin diffusion correction have been published, they are often not employed to derive distance restraints. This prompted us to write a user-friendly and CPU-efficient method to correct for spin diffusion that is fully integrated in our program ambiguous restraints for iterative assignment (ARIA). ARIA thus allows automated iterative NOE assignment and structure calculation with spin diffusion corrected distances. The method relies on numerical integration of the coupled differential equations which govern relaxation by matrix squaring and sparse matrix techniques. We derive a correction factor for the distance restraints from calculated NOE volumes and inter-proton distances. To evaluate the impact of our spin diffusion correction, we tested the new calibration process extensively with data from the Pleckstrin homology (PH) domain of Mus musculus beta-spectrin. By comparing structures refined with and without spin diffusion correction, we show that spin diffusion corrected distance restraints give rise to structures of higher quality (notably fewer NOE violations and a more regular Ramachandran map). Furthermore, spin diffusion correction permits the use of tighter error bounds which improves the distinction between signal and noise in an automated NOE assignment scheme.

  18. Techniques for transparent lattice measurement and correction

    Science.gov (United States)

    Cheng, Weixing; Li, Yongjun; Ha, Kiman

    2017-07-01

    A novel method has been successfully demonstrated at NSLS-II to characterize the lattice parameters with gated BPM turn-by-turn (TbT) capability. This method can be used at high current operation. Conventional lattice characterization and tuning are carried out at low current in dedicated machine studies which include beam-based measurement/correction of orbit, tune, dispersion, beta-beat, phase advance, coupling etc. At the NSLS-II storage ring, we observed lattice drifting during beam accumulation in user operation. Coupling and lifetime change while insertion device (ID) gaps are moved. With the new method, dynamical lattice correction is possible to achieve reliable and productive operations. A bunch-by-bunch feedback system excites a small fraction (∼1%) of bunches and gated BPMs are aligned to see those bunch motions. The gated TbT position data are used to characterize the lattice hence correction can be applied. As there are ∼1% of total charges disturbed for a short period of time (several ms), this method is transparent to general user operation. We demonstrated the effectiveness of these tools during high current user operation.

  19. Local stretch zeroing NMO correction

    Science.gov (United States)

    Kazemi, N.; Siahkoohi, H. R.

    2012-01-01

    In this paper we present a new method of normal move-out (NMO) correction called local stretch zeroing (LSZ) method that avoids NMO stretch. The method eliminates the theoretical curves that generate interpolated data samples responsible for NMO stretch. Pre-correction time sampling interval is preserved by reassigning and zero padding of true data samples. The optimum mute zone selection feature of the LSZ method eliminates all interfering reflection events at far offsets. The resulted stacked section from the LSZ method contains generally higher frequency components than a normal stack, and preserves most of the shallow reflectors. The LSZ method requires that zero-offset width of the time gate, i.e. zero-offset time difference between two adjacent reflections, be larger than the dominant period. The major shortcoming of the method occurs when CMP data are over- or under-NMO corrected. Both synthetic and real world examples show the efficiency of the LSZ method over the conventional NMO (CNMO) correction. The method loses its superiority when CMP data are over- or under-NMO corrected.

  20. 椎弓根螺钉内固定材料置入并植骨融合后路矫正治疗重度僵硬性青少年特发性脊柱侧凸20例%Posterior correction using pedicle screw fixation combined with bone grafting and fusion for treatment of severe and rigid adolescent idiopathic scoliosis in 20 cases

    Institute of Scientific and Technical Information of China (English)

    臧危平; 刘祖德; 李展春; 冯宇; 张磊

    2008-01-01

    主弯平均Cobb角从术前的82°(75o~ 92o)矫正到31°(22°~37°),平均矫正率为62%.③双肩高度差及住院时间:术后脊柱侧位片均显示患者胸腰椎基本恢复正常后凸及前凸,平均双肩高度差为7.5 mm(0~11 mm),患者住院日为8~11 d, 平均9 d.④随访结果:所有患者均获术后4年随访,所有侧凸主弯矫正角度未发生丢失,固定节段全部融合,无断钉、断棒发生.结论:单纯后路椎弓根螺钉内固定材料置入并植骨融合术能有效治疗主弯在75o~92o,柔韧性≥ 20%的重度僵硬性青少年特发性脊柱侧凸.%BACKGROUND: Traditional anterior release followed by posterior correction and fusion is frequently used to treat severe and rigid adolescent idiopathic scoliosis, which is considered as Cobb angle of the major curve > 65° and flexibility < 34.5%; however, there are a great majority of complications. Whether isolated posterior correction using pedicle screw fixation combining with bone grafting and fusion may provide better effects on severe and rigid adolescent idiopathic scoliosis needs to be further studied.OBJECTIVE: To evaluate isolated posterior correction using pedicle screw fixation combining with bone grafting and fusion for the treatment of severe and rigid adolescent idiopathic scoliosis. DESIGN: Case analysis.SETTING: Department of Orthopaedics, Renji Hospital, Medical College of Shanghai Jiao Tong University.PARTICIPANTS: Twenty patients with severe and rigid adolescent idiopathic scoliosis, including 8 males and 12 females, were selected from Department of Orthopaedics, Renji Hospital, Medical College of Shanghai Jiaotong University from June 1999 to August 2005. They were 12-18 years old, and the mean age was 14.6 years. All patients were finally diagnosed as X-ray of whole spine. According to King-Moe criteria, patients were classified into type Ⅰ(n =4), type Ⅱ(n =6), type Ⅲ (n =5), type Ⅳ(n =3) and type Ⅴ(n =2). Before surgery, mean Cobb angle of the major curve was 82

  1. Corrections

    Science.gov (United States)

    2004-05-01

    1. The first photograph on p12 of News in Physics Educaton January 2004 is of Prof. Paul Black and not Prof. Jonathan Osborne, as stated. 2. The review of Flowlog on p209 of the March 2004 issue wrongly gives the maximum sampling rate of the analogue inputs as 25 kHz (40 ms) instead of 25 kHz (40 µs) and the digital inputs as 100 kHz (10 ms) instead of 100 kHz (10 µs). 3. The letter entitled 'A trial of two energies' by Eric McIldowie on pp212-4 of the March 2004 issue was edited to fit the space available. We regret that a few small errors were made in doing this. Rather than detail these, the interested reader can access the whole of the original letter as a Word file from the link below.

  2. Correction.

    Science.gov (United States)

    2016-04-01

    Sukcharanjit S, Tan AS, Loo AV, Chan XL, Wang CY. The effect of a forced-air warming blanket on patients’ end-tidal and transcutaneous carbon dioxide partial pressures during eye surgery under local anaesthesia: a single-blind, randomised controlled trial. Anaesthesia 2015; 70: 1390–4. In the article [1] by Sukcharanjit et al., data in the ‘Systolic blood pressure; mmHg’ row in Table 1 is listed incorrectly. It should be: 158.0 (14.3) in the Forced air warmer column and 160.9 (15.6) in the Heated Overblanket column.

  3. Correction.

    Science.gov (United States)

    1991-11-29

    Because of a production error, the photographs of pierre Chambon and Harald zur Hausen, which appeared on pages 1116 and 1117 of last week's issue (22 November), were transposed. Here's what you should have seen: Chambon is on the left, zur Hausen on the right.

  4. Correction

    Science.gov (United States)

    1999-11-01

    Synsedimentary deformation in the Jurassic of southeastern Utah—A case of impact shaking? COMMENT Geology, v. 27, p. 661 (July 1999) The sentence on p. 661, first column, second paragraph, line one, should read: The 1600 m of Pennsylvania Paradox Formation is 75 90% salt in Arches National Park. The sentence on p. 661, second column, third paragraph, line seven, should read: This high-pressured ydrothermal solution created the clastic dikes, chert nodules from reprecipitated siliceous cement that have been called “siliceous impactites” (Kriens et al., 1997), and much of the present structure at Upheaval Dome by further faulting.

  5. Correction

    Science.gov (United States)

    2016-09-01

    The feature article “Neutrons for new drugs” (August pp26-29) stated that neutron crystallography was used to determine the structures of “wellknown complex biological molecules such as lysine, insulin and trypsin”.

  6. Correction

    CERN Multimedia

    2007-01-01

    From left to right: Luis, Carmen, Mario, Christian and José listening to speeches by theorists Alvaro De Rújula and Luis Alvarez-Gaumé (right) at their farewell gathering on 15 May.We unfortunately cut out a part of the "Word of thanks" from the team retiring from Restaurant No. 1. The complete message is published below: Dear friends, You are the true "nucleus" of CERN. Every member of this extraordinary human mosaic will always remain in our affections and in our thoughts. We have all been very touched by your spontaneous generosity. Arrivederci, Mario Au revoir,Christian Hasta Siempre Carmen, José and Luis PS: Lots of love to the theory team and to the hidden organisers. So long!

  7. Local Correction of Boolean Functions

    CERN Document Server

    Alon, Noga

    2011-01-01

    A Boolean function f over n variables is said to be q-locally correctable if, given a black-box access to a function g which is "close" to an isomorphism f_sigma of f, we can compute f_sigma(x) for any x in Z_2^n with good probability using q queries to g. We observe that any k-junta, that is, any function which depends only on k of its input variables, is O(2^k)-locally correctable. Moreover, we show that there are examples where this is essentially best possible, and locally correcting some k-juntas requires a number of queries which is exponential in k. These examples, however, are far from being typical, and indeed we prove that for almost every k-junta, O(k log k) queries suffice.

  8. String-Corrected Black Holes

    Energy Technology Data Exchange (ETDEWEB)

    Hubeny, Veronika; Maloney, Alexander; Rangamani, Mukund

    2005-02-07

    We investigate the geometry of four dimensional black hole solutions in the presence of stringy higher curvature corrections to the low energy effective action. For certain supersymmetric two charge black holes these corrections drastically alter the causal structure of the solution, converting seemingly pathological null singularities into timelike singularities hidden behind a finite area horizon. We establish, analytically and numerically, that the string-corrected two-charge black hole metric has the same Penrose diagram as the extremal four-charge black hole. The higher derivative terms lead to another dramatic effect -- the gravitational force exerted by a black hole on an inertial observer is no longer purely attractive! The magnitude of this effect is related to the size of the compactification manifold.

  9. String-corrected black holes

    Energy Technology Data Exchange (ETDEWEB)

    Hubeny, Veronika E. [Department of Physics, University of California, Berkeley, CA 94720 (United States); Maloney, Alexander [SLAC and Department of Physics, Stanford University, Stanford, CA 94309 (United States); Rangamani, Mukund [Department of Physics, University of California, Berkeley, CA 94720 (United States)

    2005-05-01

    We investigate the geometry of four dimensional black hole solutions in the presence of stringy higher curvature corrections to the low energy effective action. For certain supersymmetric two charge black holes these corrections drastically alter the causal structure of the solution, converting seemingly pathological null singularities into timelike singularities hidden behind a finite area horizon. We establish, analytically and numerically, that the string-corrected two-charge black hole metric has the same Penrose diagram as the extremal four-charge black hole. The higher derivative terms lead to another dramatic effect - the gravitational force exerted by a black hole on an inertial observer is no longer purely attractive{exclamation_point} The magnitude of this effect is related to the size of the compactification manifold.

  10. Aberration Correction in Electron Microscopy

    CERN Document Server

    Rose, Harald H

    2005-01-01

    The resolution of conventional electron microscopes is limited by spherical and chromatic aberrations. Both defects are unavoidable in the case of static rotationally symmetric electromagnetic fields (Scherzer theorem). Multipole correctors and electron mirrros have been designed and built, which compensate for these aberrations. The principles of correction will be demonstrated for the tetrode mirror, the quadrupole-octopole corrector and the hexapole corrector. Electron mirrors require a magnetic beam separator free of second-order aberrations. The multipole correctors are highly symmetric telescopic systems compensating for the defects of the objective lens. The hexapole corrector has the most simple structure yet eliminates only the spherical aberration, whereas the mirror and the quadrupole-octopole corrector are able to correct for both aberrations. Chromatic correction is achieved in the latter corrector by cossed electric and magnetic quadrupoles acting as first-order Wien filters. Micrographs obtaine...

  11. Classical Corrections in String Cosmology

    CERN Document Server

    Brustein, Ram; Brustein, Ram; Madden, Richard

    1999-01-01

    An important element in a model of non-singular string cosmology is a phase in which classical corrections saturate the growth of curvature in a deSitter-like phase with a linearly growing dilaton (an `algebraic fixed point'). As the form of the classical corrections is not well known, here we look for evidence, based on a suggested symmetry of the action, scale factor duality and on conformal field theory considerations, that they can produce this saturation. It has previously been observed that imposing scale factor duality on the $O(\\alpha')$ corrections is not compatible with fixed point behavior. Here we present arguments that these problems persist to all orders in $\\alpha'$. We also present evidence for the form of a solution to the equations of motion using conformal perturbation theory, examine its implications for the form of the effective action and find novel fixed point structure.

  12. Classical corrections in string cosmology

    Science.gov (United States)

    Brustein, Ram; Madden, Richard

    1999-07-01

    An important element in a model of non-singular string cosmology is a phase in which classical corrections saturate the growth of curvature in a deSitter-like phase with a linearly growing dilaton (an `algebraic fixed point'). As the form of the classical corrections is not well known, here we look for evidence, based on a suggested symmetry of the action, scale factor duality and on conformal field theory considerations, that they can produce this saturation. It has previously been observed that imposing scale factor duality on the O(alpha') corrections is not compatible with fixed point behavior. Here we present arguments that these problems persist to all orders in alpha'. We also present evidence for the form of a solution to the equations of motion using conformal perturbation theory, examine its implications for the form of the effective action and find novel fixed point structure.

  13. Binary Error Correcting Network Codes

    CERN Document Server

    Wang, Qiwen; Li, Shuo-Yen Robert

    2011-01-01

    We consider network coding for networks experiencing worst-case bit-flip errors, and argue that this is a reasonable model for highly dynamic wireless network transmissions. We demonstrate that in this setup prior network error-correcting schemes can be arbitrarily far from achieving the optimal network throughput. We propose a new metric for errors under this model. Using this metric, we prove a new Hamming-type upper bound on the network capacity. We also show a commensurate lower bound based on GV-type codes that can be used for error-correction. The codes used to attain the lower bound are non-coherent (do not require prior knowledge of network topology). The end-to-end nature of our design enables our codes to be overlaid on classical distributed random linear network codes. Further, we free internal nodes from having to implement potentially computationally intensive link-by-link error-correction.

  14. String-Corrected Black Holes

    Energy Technology Data Exchange (ETDEWEB)

    Hubeny, V.

    2005-01-12

    We investigate the geometry of four dimensional black hole solutions in the presence of stringy higher curvature corrections to the low energy effective action. For certain supersymmetric two charge black holes these corrections drastically alter the causal structure of the solution, converting seemingly pathological null singularities into timelike singularities hidden behind a finite area horizon. We establish, analytically and numerically, that the string-corrected two-charge black hole metric has the same Penrose diagram as the extremal four-charge black hole. The higher derivative terms lead to another dramatic effect--the gravitational force exerted by a black hole on an inertial observer is no longer purely attractive. The magnitude of this effect is related to the size of the compactification manifold.

  15. Automatic orientation correction for radiographs

    Science.gov (United States)

    Luo, Hui; Luo, Jiebo; Wang, Xiaohui

    2006-03-01

    In picture archiving and communications systems (PACS), images need to be displayed in standardized ways for radiologists' interpretations. However, for most radiographs acquired by computed radiography (CR), digital radiography (DR), or digitized films, the image orientation is undetermined because of the variation of examination conditions and patient situations. To address this problem, an automatic orientation correction method is presented. It first detects the most indicative region for orientation in a radiograph, and then extracts a set of low-level visual features sensitive to rotation from the region. Based on these features, a trained classifier based on a support vector machine is employed to recognize the correct orientation of the radiograph and reorient it to a desired position. A large-scale experiment has been conducted on more than 12,000 radiographs covering a large variety of body parts and projections to validate the method. The overall performance is quite promising, with the success rate of orientation correction reaching 95.2%.

  16. Gravitomagnetic corrections on gravitational waves

    CERN Document Server

    Capozziello, S; Forte, L; Garufi, F; Milano, L

    2009-01-01

    Gravitational waveforms and production could be considerably affected by gravitomagnetic corrections considered in relativistic theory of orbits. Beside the standard periastron effect of General Relativity, new nutation effects come out when c^{-3} corrections are taken into account. Such corrections emerge as soon as matter-current densities and vector gravitational potentials cannot be discarded into dynamics. We study the gravitational waves emitted through the capture, in the gravitational field of massive binary systems (e.g. a very massive black hole on which a stellar object is inspiralling) via the quadrupole approximation, considering precession and nutation effects. We present a numerical study to obtain the gravitational wave luminosity, the total energy output and the gravitational radiation amplitude. From a crude estimate of the expected number of events towards peculiar targets (e.g. globular clusters) and in particular, the rate of events per year for dense stellar clusters at the Galactic Cen...

  17. When correction turns positive: processing corrective prosody in Dutch.

    Directory of Open Access Journals (Sweden)

    Diana V Dimitrova

    Full Text Available Current research on spoken language does not provide a consistent picture as to whether prosody, the melody and rhythm of speech, conveys a specific meaning. Perception studies show that English listeners assign meaning to prosodic patterns, and, for instance, associate some accents with contrast, whereas Dutch listeners behave more controversially. In two ERP studies we tested how Dutch listeners process words carrying two types of accents, which either provided new information (new information accents or corrected information (corrective accents, both in single sentences (experiment 1 and after corrective and new information questions (experiment 2. In both experiments corrective accents elicited a sustained positivity as compared to new information accents, which started earlier in context than in single sentences. The positivity was not modulated by the nature of the preceding question, suggesting that the underlying neural mechanism likely reflects the construction of an interpretation to the accented word, either by identifying an alternative in context or by inferring it when no context is present. Our experimental results provide strong evidence for inferential processes related to prosodic contours in Dutch.

  18. When correction turns positive: processing corrective prosody in Dutch.

    Science.gov (United States)

    Dimitrova, Diana V; Stowe, Laurie A; Hoeks, John C J

    2015-01-01

    Current research on spoken language does not provide a consistent picture as to whether prosody, the melody and rhythm of speech, conveys a specific meaning. Perception studies show that English listeners assign meaning to prosodic patterns, and, for instance, associate some accents with contrast, whereas Dutch listeners behave more controversially. In two ERP studies we tested how Dutch listeners process words carrying two types of accents, which either provided new information (new information accents) or corrected information (corrective accents), both in single sentences (experiment 1) and after corrective and new information questions (experiment 2). In both experiments corrective accents elicited a sustained positivity as compared to new information accents, which started earlier in context than in single sentences. The positivity was not modulated by the nature of the preceding question, suggesting that the underlying neural mechanism likely reflects the construction of an interpretation to the accented word, either by identifying an alternative in context or by inferring it when no context is present. Our experimental results provide strong evidence for inferential processes related to prosodic contours in Dutch.

  19. SELF CORRECTION WORKS BETTER THAN TEACHER CORRECTION IN EFL SETTING

    Directory of Open Access Journals (Sweden)

    Azizollah Dabaghi

    2012-11-01

    Full Text Available Learning a foreign language takes place step by step, during which mistakes are to be expected in all stages of learning. EFL learners are usually afraid of making mistakes which prevents them from being receptive and responsive. Overcoming fear of mistakes depends on the way mistakes are rectified. It is believed that autonomy and learner-centeredness suggest that in some settings learner's self-correction of mistakes might be more beneficial for language learning than teacher's correction. This assumption has been the subject of debates for some time. Some researchers believe that correction whether that of teacher's or on behalf of learners is effective in showing them how their current interlanguage differs from the target (Long &Robinson, 1998. Others suggest that correcting the students whether directly or through recasts are ambiguous and may be perceived by the learner as confirmation of meaning rather than feedback on form (Lyster, 1998a. This study is intended to investigate the effects of correction on Iranian intermediate EFL learners' writing composition in Payam Noor University. For this purpose, 90 English majoring students, studying at Isfahan Payam Noor University were invited to participate at the experiment. They all received a sample of TOFEL test and a total number of 60 participants whose scores were within the range of one standard deviation below and above the mean were divided into two equal groups; experimental and control. The experimental group went through some correction during the experiment while the control group remained intact and the ordinary processes of teaching went on. Each group received twelve sessions of two hour classes every week on advanced writing course in which some activities of Modern English (II were selected. Then after the treatment both groups received an immediate test as post-test and the experimental group took the second post-test as the delayed recall test with the same design as the

  20. Detecting and Correcting Speech Repairs

    CERN Document Server

    Heeman, P A; Heeman, Peter; Allen, James

    1994-01-01

    Interactive spoken dialog provides many new challenges for spoken language systems. One of the most critical is the prevalence of speech repairs. This paper presents an algorithm that detects and corrects speech repairs based on finding the repair pattern. The repair pattern is built by finding word matches and word replacements, and identifying fragments and editing terms. Rather than using a set of prebuilt templates, we build the pattern on the fly. In a fair test, our method, when combined with a statistical model to filter possible repairs, was successful at detecting and correcting 80\\% of the repairs, without using prosodic information or a parser.

  1. Self-correcting Multigrid Solver

    Energy Technology Data Exchange (ETDEWEB)

    Jerome L.V. Lewandowski

    2004-06-29

    A new multigrid algorithm based on the method of self-correction for the solution of elliptic problems is described. The method exploits information contained in the residual to dynamically modify the source term (right-hand side) of the elliptic problem. It is shown that the self-correcting solver is more efficient at damping the short wavelength modes of the algebraic error than its standard equivalent. When used in conjunction with a multigrid method, the resulting solver displays an improved convergence rate with no additional computational work.

  2. Correction of gene expression data

    DEFF Research Database (Denmark)

    Darbani Shirvanehdeh, Behrooz; Stewart, C. Neal, Jr.; Noeparvar, Shahin;

    2014-01-01

    This report investigates for the first time the potential inter-treatment bias source of cell number for gene expression studies. Cell-number bias can affect gene expression analysis when comparing samples with unequal total cellular RNA content or with different RNA extraction efficiencies...... an analytical approach to examine the suitability of correction methods by considering the inter-treatment bias as well as the inter-replicate variance, which allows use of the best correction method with minimum residual bias. Analyses of RNA sequencing and microarray data showed that the efficiencies...

  3. Corrective Physical Education. Revised Edition.

    Science.gov (United States)

    Wilmington Public Schools, DE.

    This guide, prepared to assist students who have postural and other remedial defects, is divided into four sections. Section one outlines the organization and administration of a remedial physical education program and gives information concerning the administration of alignment tests and corrections. Section two discusses anteroposterior…

  4. The correct "ball bearings" data.

    Science.gov (United States)

    Caroni, C

    2002-12-01

    The famous data on fatigue failure times of ball bearings have been quoted incorrectly from Lieblein and Zelen's original paper. The correct data include censored values, as well as non-fatigue failures that must be handled appropriately. They could be described by a mixture of Weibull distributions, corresponding to different modes of failure.

  5. "Free Speech" and "Political Correctness"

    Science.gov (United States)

    Scott, Peter

    2016-01-01

    "Free speech" and "political correctness" are best seen not as opposing principles, but as part of a spectrum. Rather than attempting to establish some absolute principles, this essay identifies four trends that impact on this debate: (1) there are, and always have been, legitimate debates about the--absolute--beneficence of…

  6. Multilingual text induced spelling correction

    NARCIS (Netherlands)

    Reynaert, M.W.C.

    2004-01-01

    We present TISC, a multilingual, language-independent and context-sensitive spelling checking and correction system designed to facilitate the automatic removal of non-word spelling errors in large corpora. Its lexicon is derived from raw text corpora, without supervision, and contains word unigrams

  7. Speech Correction in the Schools.

    Science.gov (United States)

    Eisenson, Jon; Ogilvie, Mardel

    An introduction to the problems and therapeutic needs of school age children whose speech requires remedial attention, the text is intended for both the classroom teacher and the speech correctionist. General considerations include classification and incidence of speech defects, speech correction services, the teacher as a speaker, the mechanism…

  8. ADMINISTRATIVE GUIDE IN SPEECH CORRECTION.

    Science.gov (United States)

    HEALEY, WILLIAM C.

    WRITTEN PRIMARILY FOR SCHOOL SUPERINTENDENTS, PRINCIPALS, SPEECH CLINICIANS, AND SUPERVISORS, THIS GUIDE OUTLINES THE MECHANICS OF ORGANIZING AND CONDUCTING SPEECH CORRECTION ACTIVITIES IN THE PUBLIC SCHOOLS. IT INCLUDES THE REQUIREMENTS FOR CERTIFICATION OF A SPEECH CLINICIAN IN MISSOURI AND DESCRIBES ESSENTIAL STEPS FOR THE DEVELOPMENT OF A…

  9. CORRECTIVE ACTION IN CAR MANUFACTURING

    Directory of Open Access Journals (Sweden)

    H. Rohne

    2012-01-01

    Full Text Available

    ENGLISH ABSTRACT: In this paper the important .issues involved in successfully implementing corrective action systems in quality management are discussed. The work is based on experience in implementing and operating such a system in an automotive manufacturing enterprise in South Africa. The core of a corrective action system is good documentation, supported by a computerised information system. Secondly, a systematic problem solving methodology is essential to resolve the quality related problems identified by the system. In the following paragraphs the general corrective action process is discussed and the elements of a corrective action system are identified, followed by a more detailed discussion of each element. Finally specific results from the application are discussed.

    AFRIKAANSE OPSOMMING: Belangrike oorwegings by die suksesvolle implementering van korrektiewe aksie stelsels in gehaltebestuur word in hierdie artikel bespreek. Die werk is gebaseer op ondervinding in die implementering en bedryf van so 'n stelsel by 'n motorvervaardiger in Suid Afrika. Die kern van 'n korrektiewe aksie stelsel is goeie dokumentering, gesteun deur 'n gerekenariseerde inligtingstelsel. Tweedens is 'n sistematiese probleemoplossings rnetodologie nodig om die gehalte verwante probleme wat die stelsel identifiseer aan te spreek. In die volgende paragrawe word die algemene korrektiewe aksie proses bespreek en die elemente van die korrektiewe aksie stelsel geidentifiseer. Elke element word dan in meer besonderhede bespreek. Ten slotte word spesifieke resultate van die toepassing kortliks behandel.

  10. An improved density matrix functional by physically motivated repulsive corrections.

    Science.gov (United States)

    Gritsenko, Oleg; Pernal, Katarzyna; Baerends, Evert Jan

    2005-05-22

    An improved density matrix functional [correction to Buijse and Baerends functional (BBC)] is proposed, in which a hierarchy of physically motivated repulsive corrections is employed to the strongly overbinding functional of Buijse and Baerends (BB). The first correction C1 restores the repulsive exchange-correlation (xc) interaction between electrons in weakly occupied natural orbitals (NOs) as it appears in the exact electron pair density rho(2) for the limiting two-electron case. The second correction C2 reduces the xc interaction of the BB functional between electrons in strongly occupied NOs to an exchange-type interaction. The third correction C3 employs a similar reduction for the interaction of the antibonding orbital of a dissociating molecular bond. In addition, C3 applies a selective cancellation of diagonal terms in the Coulomb and xc energies (not for the frontier orbitals). With these corrections, BBC still retains a correct description of strong nondynamical correlation for the dissociating electron pair bond. BBC greatly improves the quality of the BB potential energy curves for the prototype few-electron molecules and in several cases BBC reproduces very well the benchmark ab initio potential curves. The average error of the self-consistent correlation energies obtained with BBC3 for prototype atomic systems and molecular systems at the equilibrium geometry is only ca. 6%.

  11. K-corrections and extinction corrections for Type Ia supernovae

    Energy Technology Data Exchange (ETDEWEB)

    Nugent, Peter; Kim, Alex; Perlmutter, Saul

    2002-05-21

    The measurement of the cosmological parameters from Type Ia supernovae hinges on our ability to compare nearby and distant supernovae accurately. Here we present an advance on a method for performing generalized K-corrections for Type Ia supernovae which allows us to compare these objects from the UV to near-IR over the redshift range 0 < z < 2. We discuss the errors currently associated with this method and how future data can improve upon it significantly. We also examine the effects of reddening on the K-corrections and the light curves of Type Ia supernovae. Finally, we provide a few examples of how these techniques affect our current understanding of a sample of both nearby and distant supernovae.

  12. Atmospheric Corrections for Altimetry Studies over Inland Water

    Directory of Open Access Journals (Sweden)

    M. Joana Fernandes

    2014-05-01

    Full Text Available Originally designed for applications over the ocean, satellite altimetry has been proven to be a useful tool for hydrologic studies. Altimeter products, mainly conceived for oceanographic studies, often fail to provide atmospheric corrections suitable for inland water studies. The focus of this paper is the analysis of the main issues related with the atmospheric corrections that need to be applied to the altimeter range to get precise water level heights. Using the corrections provided on the Radar Altimeter Database System, the main errors present in the dry and wet tropospheric corrections and in the ionospheric correction of the various satellites are reported. It has been shown that the model-based tropospheric corrections are not modeled properly and in a consistent way in the various altimetric products. While over the ocean, the dry tropospheric correction (DTC is one of the most precise range corrections, in some of the present altimeter products, it is the correction with the largest errors over continental water regions, causing large biases of several decimeters, and along-track interpolation errors up to several centimeters, both with small temporal variations. The wet tropospheric correction (WTC from the on-board microwave radiometers is hampered by the contamination on the radiometer measurements of the surrounding lands, making it usable only in the central parts of large lakes. In addition, the WTC from atmospheric models may also have large errors when it is provided at sea level instead of surface height. These errors cannot be corrected by the user, since no accurate expression exists for the height variation of the WTC. Alternative and accurate corrections can be computed from in situ data, e.g., DTC from surface pressure at barometric stations and WTC from Global Navigation Satellite System permanent stations. The latter approach is particularly favorable for small lakes and reservoirs, where GNSS-derived WTC at a single

  13. Correcting ligands, metabolites, and pathways

    Directory of Open Access Journals (Sweden)

    Vriend Gert

    2006-11-01

    Full Text Available Abstract Background A wide range of research areas in bioinformatics, molecular biology and medicinal chemistry require precise chemical structure information about molecules and reactions, e.g. drug design, ligand docking, metabolic network reconstruction, and systems biology. Most available databases, however, treat chemical structures more as illustrations than as a datafield in its own right. Lack of chemical accuracy impedes progress in the areas mentioned above. We present a database of metabolites called BioMeta that augments the existing pathway databases by explicitly assessing the validity, correctness, and completeness of chemical structure and reaction information. Description The main bulk of the data in BioMeta were obtained from the KEGG Ligand database. We developed a tool for chemical structure validation which assesses the chemical validity and stereochemical completeness of a molecule description. The validation tool was used to examine the compounds in BioMeta, showing that a relatively small number of compounds had an incorrect constitution (connectivity only, not considering stereochemistry and that a considerable number (about one third had incomplete or even incorrect stereochemistry. We made a large effort to correct the errors and to complete the structural descriptions. A total of 1468 structures were corrected and/or completed. We also established the reaction balance of the reactions in BioMeta and corrected 55% of the unbalanced (stoichiometrically incorrect reactions in an automatic procedure. The BioMeta database was implemented in PostgreSQL and provided with a web-based interface. Conclusion We demonstrate that the validation of metabolite structures and reactions is a feasible and worthwhile undertaking, and that the validation results can be used to trigger corrections and improvements to BioMeta, our metabolite database. BioMeta provides some tools for rational drug design, reaction searches, and

  14. 7 CFR 800.165 - Corrected certificates.

    Science.gov (United States)

    2010-01-01

    ... this process shall be corrected according to this section. (b) Who may correct. Only official personnel.... According to this section and the instructions, corrected certificates shall show (i) the terms “Corrected... that has been superseded by another certificate or on the basis of a subsequent analysis for...

  15. 5 CFR 1601.34 - Error correction.

    Science.gov (United States)

    2010-01-01

    ... 5 Administrative Personnel 3 2010-01-01 2010-01-01 false Error correction. 1601.34 Section 1601.34... Contribution Allocations and Interfund Transfer Requests § 1601.34 Error correction. Errors in processing... in the wrong investment fund, will be corrected in accordance with the error correction...

  16. [Severe hyperkalemia in cardiac patients].

    Science.gov (United States)

    Barrillon, A; Bousser, J P; Labrousse, J; Cousteau, J P; Lhoste, F; Gerbaux, A

    1976-10-02

    Hyperkalaemia with severe myocardial consequence may complicate the treatment of heart failure. In five patients who developed kalaemia ranging from 6.5. to 8.6. mEq/l, the ECG showed altered auriculogram and/or widened QRS, the latter change being associated with ST segment elevation and very large T wave in one case. Such hyperkalaemia cannot be termed iatrogenic, although it is promoted by diuretic-induced hyponatraemia and dehydration. The essential part is played by an aggravation of the haemodynamic status, responsible for acute renal insufficiency with oligoanuria, and by the attendant metabolic acidosis. The correction of this metabolic acidosis promotes diuresis, causing potassium depletion and the rapid regression of electrocardiographic abnormalities. Parenteral alkalinization with sodium bicarbonate, associated with furosemid to prevent sodium overload, instituted in emergency, is the only way to prevent asystole or ventricular fibrillation when kalaemia exceeds 8 mEq/l.

  17. Motion-corrected Fourier ptychography

    CERN Document Server

    Bian, Liheng; Guo, Kaikai; Suo, Jinli; Yang, Changhuei; Chen, Feng; Dai, Qionghai

    2016-01-01

    Fourier ptychography (FP) is a recently proposed computational imaging technique for high space-bandwidth product imaging. In real setups such as endoscope and transmission electron microscope, the common sample motion largely degrades the FP reconstruction and limits its practicability. In this paper, we propose a novel FP reconstruction method to efficiently correct for unknown sample motion. Specifically, we adaptively update the sample's Fourier spectrum from low spatial-frequency regions towards high spatial-frequency ones, with an additional motion recovery and phase-offset compensation procedure for each sub-spectrum. Benefiting from the phase retrieval redundancy theory, the required large overlap between adjacent sub-spectra offers an accurate guide for successful motion recovery. Experimental results on both simulated data and real captured data show that the proposed method can correct for unknown sample motion with its standard deviation being up to 10% of the field-of-view scale. We have released...

  18. MR image intensity inhomogeneity correction

    Science.gov (United States)

    (Vişan Pungǎ, Mirela; Moldovanu, Simona; Moraru, Luminita

    2015-01-01

    MR technology is one of the best and most reliable ways of studying the brain. Its main drawback is the so-called intensity inhomogeneity or bias field which impairs the visual inspection and the medical proceedings for diagnosis and strongly affects the quantitative image analysis. Noise is yet another artifact in medical images. In order to accurately and effectively restore the original signal, reference is hereof made to filtering, bias correction and quantitative analysis of correction. In this report, two denoising algorithms are used; (i) Basis rotation fields of experts (BRFoE) and (ii) Anisotropic Diffusion (when Gaussian noise, the Perona-Malik and Tukey's biweight functions and the standard deviation of the noise of the input image are considered).

  19. Proximity effect correction sensitivity analysis

    Science.gov (United States)

    Zepka, Alex; Zimmermann, Rainer; Hoppe, Wolfgang; Schulz, Martin

    2010-05-01

    Determining the quality of a proximity effect correction (PEC) is often done via 1-dimensional measurements such as: CD deviations from target, corner rounding, or line-end shortening. An alternative approach would compare the entire perimeter of the exposed shape and its original design. Unfortunately, this is not a viable solution as there is a practical limit to the number of metrology measurements that can be done in a reasonable amount of time. In this paper we make use of simulated results and introduce a method which may be considered complementary to the standard way of PEC qualification. It compares simulated contours with the target layout via a Boolean XOR operation with the area of the XOR differences providing a direct measure of how close a corrected layout approximates the target.

  20. Interaction and self-correction

    DEFF Research Database (Denmark)

    Satne, Glenda Lucila

    2014-01-01

    In this paper, I address the question of how to account for the normative dimension involved in conceptual competence in a naturalistic framework. First, I present what I call the naturalist challenge (NC), referring to both the phylogenetic and ontogenetic dimensions of conceptual possession...... and acquisition. I then criticize two models that have been dominant in thinking about conceptual competence, the interpretationist and the causalist models. Both fail to meet NC, by failing to account for the abilities involved in conceptual self-correction. I then offer an alternative account of self......-correction that I develop with the help of the interactionist theory of mutual understanding arising from recent developments in phenomenology and developmental psychology. © 2014 Satne....

  1. Historical aspects of aberration correction.

    Science.gov (United States)

    Rose, Harald H

    2009-06-01

    A brief history of the development of direct aberration correction in electron microscopy is outlined starting from the famous Scherzer theorem established in 1936. Aberration correction is the long story of many seemingly fruitless efforts to improve the resolution of electron microscopes by compensating for the unavoidable resolution-limiting aberrations of round electron lenses over a period of 50 years. The successful breakthrough, in 1997, can be considered as a quantum step in electron microscopy because it provides genuine atomic resolution approaching the size of the radius of the hydrogen atom. The additional realization of monochromators, aberration-free imaging energy filters and spectrometers has been leading to a new generation of analytical electron microscopes providing elemental and electronic information about the object on an atomic scale.

  2. Quantum corrections to unimodular gravity

    Energy Technology Data Exchange (ETDEWEB)

    Álvarez, Enrique; González-Martín, Sergio; Herrero-Valea, Mario [Instituto de Física Teórica UAM/CSIC,C/Nicolas Cabrera, 13-15, C.University Cantoblanco, 28049 Madrid (Spain); Departamento de Física Teórica,Universidad Autónoma de Madrid, 20849 Madrid (Spain); Martín, Carmelo P. [Universidad Complutense de Madrid (UCM), Departamento de Física Téorica I,Facultad de Ciencias Físicas, Av. Complutense S/N (Ciudad University), 28040 Madrid (Spain)

    2015-08-17

    The problem of the comological constant appears in a new light in Unimodular Gravity. In particular, the zero momentum piece of the potential (that is, the constant piece independent of the matter fields) does not automatically produce a cosmological constant proportional to it. The aim of this paper is to give some details on a calculation showing that quantum corrections do not renormalize the classical value of this observable.

  3. Holographic superconductors with Weyl corrections

    Science.gov (United States)

    Momeni, Davood; Raza, Muhammad; Myrzakulov, Ratbay

    2016-10-01

    A quick review on the analytical aspects of holographic superconductors (HSCs) with Weyl corrections has been presented. Mainly, we focus on matching method and variational approaches. Different types of such HSC have been investigated — s-wave, p-wave and Stúckelberg ones. We also review the fundamental construction of a p-wave type, in which the non-Abelian gauge field is coupled to the Weyl tensor. The results are compared from numerics to analytical results.

  4. EPS Young Physicist Prize - CORRECTION

    CERN Multimedia

    2009-01-01

    The original text for the article 'Prizes aplenty in Krakow' in Bulletin 30-31 assigned the award of the EPS HEPP Young Physicist Prize to Maurizio Pierini. In fact he shared the prize with Niki Saoulidou of Fermilab, who was rewarded for her contribution to neutrino physics, as the article now correctly indicates. We apologise for not having named Niki Saoulidou in the original article.

  5. Quantum annealing correction with minor embedding

    Science.gov (United States)

    Vinci, Walter; Albash, Tameem; Paz-Silva, Gerardo; Hen, Itay; Lidar, Daniel A.

    2015-10-01

    Quantum annealing provides a promising route for the development of quantum optimization devices, but the usefulness of such devices will be limited in part by the range of implementable problems as dictated by hardware constraints. To overcome constraints imposed by restricted connectivity between qubits, a larger set of interactions can be approximated using minor embedding techniques whereby several physical qubits are used to represent a single logical qubit. However, minor embedding introduces new types of errors due to its approximate nature. We introduce and study quantum annealing correction schemes designed to improve the performance of quantum annealers in conjunction with minor embedding, thus leading to a hybrid scheme defined over an encoded graph. We argue that this scheme can be efficiently decoded using an energy minimization technique provided the density of errors does not exceed the per-site percolation threshold of the encoded graph. We test the hybrid scheme using a D-Wave Two processor on problems for which the encoded graph is a two-level grid and the Ising model is known to be NP-hard. The problems we consider are frustrated Ising model problem instances with "planted" (a priori known) solutions. Applied in conjunction with optimized energy penalties and decoding techniques, we find that this approach enables the quantum annealer to solve minor embedded instances with significantly higher success probability than it would without error correction. Our work demonstrates that quantum annealing correction can and should be used to improve the robustness of quantum annealing not only for natively embeddable problems but also when minor embedding is used to extend the connectivity of physical devices.

  6. Corrective camouflage in pediatric dermatology.

    Science.gov (United States)

    Tedeschi, Aurora; Dall'Oglio, Federica; Micali, Giuseppe; Schwartz, Robert A; Janniger, Camila K

    2007-02-01

    Many dermatologic diseases, including vitiligo and other pigmentary disorders, vascular malformations, acne, and disfiguring scars from surgery or trauma, can be distressing to pediatric patients and can cause psychological alterations such as depression, loss of self-esteem, deterioration of quality of life, emotional distress, and, in some cases, body dysmorphic disorder. Corrective camouflage can help cover cutaneous unaesthetic disorders using a variety of water-resistant and light to very opaque products that provide effective and natural coverage. These products also can serve as concealers during medical treatment or after surgical procedures before healing is complete. Between May 2001 and July 2003. corrective camouflage was used on 15 children and adolescents (age range, 7-16 years; mean age, 14 years). The majority of patients were girls. Six patients had acne vulgaris; 4 had vitiligo; 2 had Becker nevus; and 1 each had striae distensae, allergic contact dermatitis. and postsurgical scarring. Parents of all patients were satisfied with the cosmetic cover results. We consider corrective makeup to be a well-received and valid adjunctive therapy for use during traditional long-term treatment and as a therapeutic alternative in patients in whom conventional therapy is ineffective.

  7. Quasar bolometric corrections: theoretical considerations

    CERN Document Server

    Nemmen, Rodrigo S

    2010-01-01

    Bolometric corrections based on the optical-to-ultraviolet continuum spectrum of quasars are widely used to quantify their radiative output, although such estimates are affected by a myriad of uncertainties, such as the generally unknown line-of-sight angle to the central engine. In order to shed light on these issues, we investigate the state-of-the-art models of Hubeny et al. that describe the continuum spectrum of thin accretion discs and include relativistic effects. We explore the bolometric corrections as a function of mass accretion rates, black hole masses and viewing angles, restricted to the parameter space expected for type-1 quasars. We find that a nonlinear relationship log L_bol=A + B log(lambda L_lambda) with B<=0.9 is favoured by the models and becomes tighter as the wavelength decreases. We calculate from the model the bolometric corrections corresponding to the wavelengths lambda = 1450A, 3000A and 5100A. In particular, for lambda=3000A we find A=9.24 +- 0.77 and B=0.81 +- 0.02. We demons...

  8. Severe Combined Immunodeficiency (SCID)

    Science.gov (United States)

    ... with facebook share with twitter share with linkedin Severe Combined Immunodeficiency (SCID) SCID is a group of rare disorders ... life-saving treatments. Why Is the Study of Severe Combined Immunodeficiency (SCID) a Priority for NIAID? SCID is a ...

  9. Palmer Drought Severity Index

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — PDSI from the Dai dataset. The Palmer Drought Severity Index (PDSI) is devised by Palmer (1965) to represent the severity of dry and wet spells over the U.S. based...

  10. Counterpoint Piece: The Case for Variety in Corrective Feedback Research

    Science.gov (United States)

    Lyster, Roy; Ranta, Leila

    2013-01-01

    Goo and Mackey (this issue) outline several apparent design flaws in studies that have compared the impact of different types of corrective feedback (CF). Furthermore, they argue that SLA researchers should stop comparing recasts to other types of CF because they are inherently different kinds of phenomena. Our response to their article addresses…

  11. 75 FR 15371 - Time Error Correction Reliability Standard

    Science.gov (United States)

    2010-03-29

    ...Pursuant to section 215 of the Federal Power Act, the Commission proposes to remand the proposed revised Time Error Correction Reliability Standard developed by the North American Electric Reliability Corporation (NERC) in order for NERC to develop several modifications to the proposed Reliability Standard. The proposed action ensures that any modifications to Reliability Standards will be......

  12. Dermal graft correction of extraordinary chordee.

    Science.gov (United States)

    Kogan, S J; Reda, E F; Smey, P L; Levitt, S B

    1983-11-01

    Severe degrees of primary chordee and persistent or recurrent chordee following previous surgical attempts at correction present a challenging problem. Inadequate resection of involved tissues, which may involve all layers of the penile investiture, or recurrent scarring of the ventral skin, Buck's fascia and tunica albuginea is usually the cause. Reoperation to achieve penile straightening often is unsuccessful unless all chordee-bearing tissue is resected extensively. Excision of large segments of tunica albuginea or wide separation of the margins creates a defect that tends to heal by dense scarring unless the defect is bridged by a graft. Various autogenous materials have been used, including blood vessel, fascia, free fat graft, dermis and tunica albuginea, as well as prosthestic materials, such as polytetrafluoroethylene, with varying results. A series of patients with extensive chordee is presented in whom tunical resection was necessary to achieve penile straightening. The results of free dermal graft replacement of the tunica are reported.

  13. Modified koyanagi repair for severe hypospadias

    Science.gov (United States)

    Vepakomma, Deepti; Alladi, Anand; Ramareddy, Raghu S.; Akhtar, Tanveer

    2013-01-01

    Aim: To report the results of an early series of patients who underwent modified Koyanagi repair for severe hypospadias. Materials and Methods: A total of 24 boys (age: 9 months to 11 years) with proximal hypospadias, chordee, and poor urethral plate underwent modified Koyanagi repair between September 2008 and January 2012. Nine boys had associated penoscrotal transposition that was corrected simultaneously. Vascularized parameatal based foreskin flap was used to correct the hypospadias in a single stage. The follow-up ranged from 6 months to 3.5 years. Results: A total of 13 of the 24 children had a good outcome and were voiding normally, while 11 boys developed complications, 3 of which were major and 8 minor. The major complications were complete breakdown (n = 1), meatal and distal neourethral stenosis requiring laying open of distal urethra (n = 1), and glans breakdown (n = 1). The minor complications included fistulae (n = 5), meatal stenosis amenable to dilatation (n = 1), and lateral chordee (n = 1). Majority of the complications were in the initial patients, with successful outcomes in the last 1 year. Most of these complications were successfully managed by minor second procedures. Conclusion: Modified Koyanagi repair not only corrects severe hypospadias with chordee but also corrects the associated penoscrotal transposition in a single stage. The results are good once the learning curve is crossed. PMID:24019639

  14. Testing Ionospheric Faraday Rotation Corrections in CASA

    Science.gov (United States)

    Kooi, Jason E.; Moellenbrock, George

    2015-04-01

    The Earth’s ionosphere introduces direction- and time-dependent effects over a range of physical and temporal scales and so is a major source for unmodeled phase offsets for low frequency radioastronomical observations. Ionospheric effects are often the limiting factor to making sensitive radioastronomical measurements to probe the solar corona or coronal mass ejections at low frequencies (CASA) package. CASA, which was developed to meet the data post-processing needs of next generation telescopes such as the Karl G. Jansky Very Large Array (VLA), did not previously have the capability to mitigate ionospheric effects. This algorithm uses GPS-based global ionosphere maps to mitigate the first and second order ionospheric effects (dispersion delay and Faraday rotation, respectively). We investigated several data centers as potential sources for global ionospheric models and chose the International Global Navigation Satellite System Service data product because data from other sources are generally too sparse to use without additional interpolation schemes. This implementation of ionospheric corrections in CASA has been tested on several sets of VLA observations and all of them showed a significant reduction of the dispersion delay. In order to rigorously test CASA’s ability to mitigate ionospheric Faraday rotation, we made VLA full-polarization observations of the standard VLA phase calibrators J0359+5057 and J0423+4150 in August 2014, using L band (1 - 2 GHz), S band (2 - 4 GHz), and C band (4 - 6 GHz) frequencies in the D array configuration. The observations were 4 hours in duration, beginning near local sunrise. In this paper, we give a general description of how these corrections are implemented as well as discussion of the code’s ability to mitigate the ionospheric effects present in these test observations over a range of times and elevation angles. This work was supported at the University of Iowa by grant ATM09-56901.

  15. Misalignment corrections in optical interconnects

    Science.gov (United States)

    Song, Deqiang

    Optical interconnects are considered a promising solution for long distance and high bitrate data transmissions, outperforming electrical interconnects in terms of loss and dispersion. Due to the bandwidth and distance advantage of optical interconnects, longer links have been implemented with optics. Recent studies show that optical interconnects have clear advantages even at very short distances---intra system interconnects. The biggest challenge for such optical interconnects is the alignment tolerance. Many free space optical components require very precise assembly and installation, and therefore the overall cost could be increased. This thesis studied the misalignment tolerance and possible alignment correction solutions for optical interconnects at backplane or board level. First the alignment tolerance for free space couplers was simulated and the result indicated the most critical alignments occur between the VCSEL, waveguide and microlens arrays. An in-situ microlens array fabrication method was designed and experimentally demonstrated, with no observable misalignment with the waveguide array. At the receiver side, conical lens arrays were proposed to replace simple microlens arrays for a larger angular alignment tolerance. Multilayer simulation models in CodeV were built to optimized the refractive index and shape profiles of the conical lens arrays. Conical lenses fabricated with micro injection molding machine and fiber etching were characterized. Active component VCSOA was used to correct misalignment in optical connectors between the board and backplane. The alignment correction capability were characterized for both DC and AC (1GHz) optical signal. The speed and bandwidth of the VCSOA was measured and compared with a same structure VCSEL. Based on the optical inverter being studied in our lab, an all-optical flip-flop was demonstrated using a pair of VCSOAs. This memory cell with random access ability can store one bit optical signal with set or

  16. Corrective Action Decision Document for Corrective Action Unit 417: Central Nevada Test Area Surface, Nevada

    Energy Technology Data Exchange (ETDEWEB)

    U.S. Department of Energy Nevada Operations Office

    1999-04-02

    This Corrective Action Decision Document (CADD) identifies and rationalizes the U.S. Department of Energy, Nevada Operations Office's selection of a recommended corrective action alternative (CAA) appropriate to facilitate the closure of Corrective Action Unit (CAU) 417: Central Nevada Test Area Surface, Nevada, under the Federal Facility Agreement and Consent Order. Located in Hot Creek Valley in Nye County, Nevada, and consisting of three separate land withdrawal areas (UC-1, UC-3, and UC-4), CAU 417 is comprised of 34 corrective action sites (CASs) including 2 underground storage tanks, 5 septic systems, 8 shaker pad/cuttings disposal areas, 1 decontamination facility pit, 1 burn area, 1 scrap/trash dump, 1 outlier area, 8 housekeeping sites, and 16 mud pits. Four field events were conducted between September 1996 and June 1998 to complete a corrective action investigation indicating that the only contaminant of concern was total petroleum hydrocarbon (TPH) which was found in 18 of the CASs. A total of 1,028 samples were analyzed. During this investigation, a statistical approach was used to determine which depth intervals or layers inside individual mud pits and shaker pad areas were above the State action levels for the TPH. Other related field sampling activities (i.e., expedited site characterization methods, surface geophysical surveys, direct-push geophysical surveys, direct-push soil sampling, and rotosonic drilling located septic leachfields) were conducted in this four-phase investigation; however, no further contaminants of concern (COCs) were identified. During and after the investigation activities, several of the sites which had surface debris but no COCs were cleaned up as housekeeping sites, two septic tanks were closed in place, and two underground storage tanks were removed. The focus of this CADD was to identify CAAs which would promote the prevention or mitigation of human exposure to surface and subsurface soils with contaminant

  17. Matrix Models and Gravitational Corrections

    CERN Document Server

    Dijkgraaf, R; Temurhan, M; Dijkgraaf, Robbert; Sinkovics, Annamaria; Temurhan, Mine

    2002-01-01

    We provide evidence of the relation between supersymmetric gauge theories and matrix models beyond the planar limit. We compute gravitational R^2 couplings in gauge theories perturbatively, by summing genus one matrix model diagrams. These diagrams give the leading 1/N^2 corrections in the large N limit of the matrix model and can be related to twist field correlators in a collective conformal field theory. In the case of softly broken SU(N) N=2 super Yang-Mills theories, we find that these exact solutions of the matrix models agree with results obtained by topological field theory methods.

  18. A Quantum Correction To Chaos

    OpenAIRE

    A. Fitzpatrick; Kaplan, Jared

    2016-01-01

    We use results on Virasoro conformal blocks to study chaotic dynamics in CFT 2 at large central charge c . The Lyapunov exponent λ L , which is a diagnostic for the early onset of chaos, receives 1 /c corrections that may be interpreted as λ L = 2 π β 1 + 12 c $$ {\\lambda}_L=\\frac{2\\pi }{\\beta}\\left(1+\\frac{12}{c}\\right) $$ . However, out of time order correlators receive other equally important 1 /c suppressed contributions that do not have such a simple interpretation. We revisit the proof ...

  19. Sparse MRI for motion correction

    CERN Document Server

    Yang, Zai; Xie, Lihua

    2013-01-01

    MR image sparsity/compressibility has been widely exploited for imaging acceleration with the development of compressed sensing. A sparsity-based approach to rigid-body motion correction is presented for the first time in this paper. A motion is sought after such that the compensated MR image is maximally sparse/compressible among the infinite candidates. Iterative algorithms are proposed that jointly estimate the motion and the image content. The proposed method has a lot of merits, such as no need of additional data and loose requirement for the sampling sequence. Promising results are presented to demonstrate its performance.

  20. Holographic Thermalization with Weyl Corrections

    CERN Document Server

    Dey, Anshuman; Sarkar, Tapobrata

    2015-01-01

    We consider holographic thermalization in the presence of a Weyl correction in five dimensional AdS space. We numerically analyze the time dependence of the two point correlation functions and the expectation values of rectangular Wilson loops in the boundary field theory. The subtle interplay between the Weyl coupling constant and the chemical potential is studied in detail. An outcome of our analysis is the appearance of a swallow tail behaviour in the thermalization curve, and we give evidence that this might indicate distinct physical situations relating to different length scales in the problem.

  1. Correct Linearization of Einstein's Equations

    Directory of Open Access Journals (Sweden)

    Rabounski D.

    2006-06-01

    Full Text Available Regularly Einstein's equations can be reduced to a wave form (linearly dependent from the second derivatives of the space metric in the absence of gravitation, the space rotation and Christoffel's symbols. As shown here, the origin of the problem is that one uses the general covariant theory of measurement. Here the wave form of Einstein's equations is obtained in the terms of Zelmanov's chronometric invariants (physically observable projections on the observer's time line and spatial section. The obtained equations depend on solely the second derivatives even if gravitation, the space rotation and Christoffel's symbols. The correct linearization proves: the Einstein equations are completely compatible with weak waves of the metric.

  2. Management of severe preeclampsia.

    Science.gov (United States)

    Brichant, G; Dewandre, P Y; Foidart, J M; Brichant, J F

    2010-01-01

    Features of severe preeclampsia include severe proteinuric hypertension and symptoms of central nervous system dysfunction, hepatocellular injury, thrombocytopenia, oliguria, pulmonary oedema, cerebrovascular accident and severe intrauterine growth restriction. Women with severe preeclampsia must be hospitalized to confirm the diagnosis, to assess the severity of the disease, to monitor the progression of the disease and to try to stabilize the disease. Severe preeclampsia may be managed expectantly, in selected cases. The objective of expectant management in these patients is to improve neonatal outcome. Expectant management is based on antihypertensive treatment and prevention of end organ dysfunction. Antihypertensive treatment improves maternal outcome but has the potential to be deleterious for the foetus. Plasma volume expansion has been suggested for severe preeclampsia but trials failed to show any benefit. Magnesium sulfate is the anticonvulsivant of choice to treat or prevent eclampsia when indicated. Antenatal corticosteroids are recommended in severely preeclamptic women with 26-34 weeks gestation. Timing of delivery is based upon gestational age, severity of preeclampsia, maternal and foetal risks.

  3. Language Trajectory through Corrective Feedback

    Directory of Open Access Journals (Sweden)

    S. Saber Alavi

    2016-08-01

    Full Text Available This quasi-experimental study was designed to investigate the effects of corrective feedback on SLA/EFL to determine the potential benefits of two different corrective feedback techniques, namely recasts and elicitation. The research hypotheses were: 1 Learners who are exposed to interactive focused task that requires CR will benefit more than those who are exposed to communicative activities only; 2 Elicitation will be more effective than recasts in leading to L2 development; Three intensive EFL classes in a language center in Songkhla province, Thailand were selected to participate in the study. Based on the study design, two class were assigned to the treatment conditions elicitation group and recasts group and the third was used as a control group. The treatment took place over a period of 9 meetings focusing on teaching third person singular –s morpheme and the provision of CF where it was necessary. The participants' knowledge of the intended syntantic point was tested before treatment and post tested after receiving the treatment. A multiple choice and focused-cloze reading grammar test was used in the pre-test and the post-test to evaluate the effects of the treatments on the learners' acquisition of third person singular morpheme. This classroom-based study showed that the two treatment groups benefited from CF strategies, but according to the study, elicitation group outperformed the recast one.

  4. Aberration correction past and present.

    Science.gov (United States)

    Hawkes, P W

    2009-09-28

    Electron lenses are extremely poor: if glass lenses were as bad, we should see as well with the naked eye as with a microscope! The demonstration by Otto Scherzer in 1936 that skillful lens design could never eliminate the spherical and chromatic aberrations of rotationally symmetric electron lenses was therefore most unwelcome and the other great electron optician of those years, Walter Glaser, never ceased striving to find a loophole in Scherzer's proof. In the wartime and early post-war years, the first proposals for correcting C(s) were made and in 1947, in a second milestone paper, Scherzer listed these and other ways of correcting lenses; soon after, Dennis Gabor invented holography for the same purpose. These approaches will be briefly summarized and the work that led to the successful implementation of quadupole-octopole and sextupole correctors in the 1990 s will be analysed. In conclusion, the elegant role of image algebra in describing image formation and processing and, above all, in developing new methods will be mentioned.

  5. OPTIMIZED STRAPDOWN CONING CORRECTION ALGORITHM

    Institute of Scientific and Technical Information of China (English)

    黄磊; 刘建业; 曾庆化

    2013-01-01

    Traditional coning algorithms are based on the first-order coning correction reference model .Usually they reduce the algorithm error of coning axis (z) by increasing the sample numbers in one iteration interval .But the increase of sample numbers requires the faster output rates of sensors .Therefore ,the algorithms are often lim-ited in practical use .Moreover ,the noncommutivity error of rotation usually exists on all three axes and the in-crease of sample numbers has little positive effect on reducing the algorithm errors of orthogonal axes (x ,y) . Considering the errors of orthogonal axes cannot be neglected in the high-precision applications ,a coning algorithm with an additional second-order coning correction term is developed to further improve the performance of coning algorithm .Compared with the traditional algorithms ,the new second-order coning algorithm can effectively reduce the algorithm error without increasing the sample numbers .Theoretical analyses validate that in a coning environ-ment with low frequency ,the new algorithm has the better performance than the traditional time-series and fre-quency-series coning algorithms ,while in a maneuver environment the new algorithm has the same order accuracy as the traditional time-series and frequency-series algorithms .Finally ,the practical feasibility of the new coning al-gorithm is demonstrated by digital simulations and practical turntable tests .

  6. Deriving time discounting correction factors for TTO tariffs.

    Science.gov (United States)

    Attema, Arthur E; Brouwer, Werner B F

    2014-04-01

    The Time Trade-off (TTO) method is a popular method for valuing health state utilities and is frequently used in economic evaluations. However, this method produces utilities that are distorted by several biases. One important bias entails the failure to incorporate time discounting. This paper aims to measure time discounting for health outcomes in a sample representative for the general population. In particular, we estimate TTO scores alongside time discounting in order to derive a set of correction factors that can be employed to correct raw TTO scores for the downward bias caused by time discounting. We find substantial positive correction factors, which are increasing with the severity of the health state. Furthermore, higher discounting is found when using more severe health states in the discounting elicitation task. More research is needed to further develop discount rate elicitation procedures and test their validity, especially in general public samples. Moreover, future research should investigate the correction of TTO values for other biases as well, such as loss aversion, and to develop a criterion to test the external validity of TTO scores.

  7. [A young woman with severe hyponatremia].

    Science.gov (United States)

    Renard, C; Garcia, C; Perret, M-R; Vest, P; El Jahiri, Y; Fuilla, C

    2004-01-01

    We report here the case of a young woman, who came by herself at the emergency department, presenting with a severe hyponatremia (106 mmol/L), as shown by her initial biological report. The biological comment leads us to review the hyponatremia considering on one hand osmolarity and on the other hand volemia. Patient's tests results showed hyponatremia with hypoosmolarity and isovolemia, due to her potomania. At last, the authors expose the main guidelines for the correction of hyponatremia.

  8. Posterior-only multilevel modified vertebral column resection for extremely severe Pott's kyphotic deformity

    National Research Council Canada - National Science Library

    Wang, Yan; Zhang, YongGang; Zhang, XueSong; Wang, Zheng; Mao, KeYa; Chen, Cao; Zheng, GuoQuan; Li, Gang; Wood, Kirkham B

    2009-01-01

    Extremely severe Pott's kyphotic deformity cannot be completely corrected by conventional techniques, including vertebral body resection, Smith-Peterson, pedicle subtraction osteotomy or even vertebral column resection (VCR...

  9. Non-factorizable photonic corrections to resonant production and decay of many unstable particles

    CERN Document Server

    Dittmaier, Stefan

    2015-01-01

    Electroweak radiative corrections to the production of high-multiplicity final states with several intermediate resonances in most cases can be sufficiently well described by the leading contribution of an expansion about the resonance poles. In this approach, also known as pole approximation, corrections are classified into separately gauge-invariant factorizable and non-factorizable corrections, where the former can be attributed to the production and decay of the unstable particles on their mass shell. The remaining non-factorizable corrections are induced by the exchange of soft photons between different production and decay subprocesses. We give explicit analytical results for the non-factorizable photonic virtual corrections to the production of an arbitrary number of unstable particles at the one-loop level and, thus, deliver an essential building block in the calculation of next-to-leading-order electroweak corrections in pole approximation. The remaining virtual factorizable corrections can be obtain...

  10. Simplified correction of g-value measurements

    DEFF Research Database (Denmark)

    Duer, Karsten

    1998-01-01

    A double glazed unit (Ipasol Natura 66/34) has been investigated in the Danish experimental setup METSET. The corrections of the experimental data are very important for the investigated sample as it shows significant spectral selectivity. In (Duer, 1998) and in (Platzer, 1998) the corrections have...... been carried out using a detailed physical model based on ISO9050 and prEN410 but using polarized data for non-normal incidence. This model is only valid for plane, clear glazings and therefor not suited for corrections of measurements performed on complex glazings. To investigate a more general...... correction procedure the results from the measurements on the Interpane DGU have been corrected using the principle outlined in (Rosenfeld, 1996). This correction procedure is more general as corrections can be carried out without a correct physical model of the investigated glazing. On the other hand...

  11. Juvenile Correctional Institutions Library Services: A Bibliography.

    Science.gov (United States)

    McAlister, Annette M.

    This bibliography lists citations for 14 articles, books, and reports concerned with library services in juvenile correctional institutions. A second section lists 21 additional materials on adult correctional libraries which also contain information relevant to the juvenile library. (KP)

  12. Antifungals in severe asthma

    NARCIS (Netherlands)

    Parulekar, Amit D.; Diamant, Zuzana; Hanania, Nicola A.

    2015-01-01

    Purpose of review Despite guideline-based treatment, many patients with severe asthma continue to have uncontrolled disease. Fungal allergy is being increasingly recognized in the pathogenesis of severe asthma. Limited data exist on the approach to treatment of fungal asthma. This review summarizes

  13. Allergy in severe asthma

    NARCIS (Netherlands)

    Del Giacco, Stefano R.; Bakirtas, A.; Bel, E.; Custovic, A.; Diamant, Z.; Hamelmann, E.; Heffler, E.; Kalayci, O.; Saglani, S.; Sergejeva, S.; Seys, S.; Simpson, A.; Bjermer, Leif

    2017-01-01

    It is well recognized that atopic sensitization is an important risk factor for asthma, both in adults and in children. However, the role of allergy in severe asthma is still under debate. The term 'Severe Asthma' encompasses a highly heterogeneous group of patients who require treatment on steps 4-

  14. Sequences of Closed Operators and Correctness

    Directory of Open Access Journals (Sweden)

    Sabra Ramadan

    2010-01-01

    Full Text Available In applications and in mathematical physics equations it is very important for mathematical models corresponding to the given problem to be correct given. In this research we will study the relationship between the sequence of closed operators An→A and the correctness of the equation Ax = y. Also we will introduce the criterion for correctness.

  15. 5 CFR 1604.6 - Error correction.

    Science.gov (United States)

    2010-01-01

    ... 5 Administrative Personnel 3 2010-01-01 2010-01-01 false Error correction. 1604.6 Section 1604.6 Administrative Personnel FEDERAL RETIREMENT THRIFT INVESTMENT BOARD UNIFORMED SERVICES ACCOUNTS § 1604.6 Error correction. (a) General rule. A service member's employing agency must correct the service member's...

  16. QT measurement and heart rate correction during hypoglycemia

    DEFF Research Database (Denmark)

    Christensen, Toke Folke; Randløv, Jette; Christensen, Leif Engmann;

    2010-01-01

    Introduction. Several studies show that hypoglycemia causes QT interval prolongation. The aim of this study was to investigate the effect of QT measurement methodology, heart rate correction, and insulin types during hypoglycemia. Methods. Ten adult subjects with type 1 diabetes had hypoglycemia...... induced by intravenous injection of two insulin types in a cross-over design. QT measurements were done using the slope-intersect (SI) and manual annotation (MA) methods. Heart rate correction was done using Bazett's (QTcB) and Fridericia's (QTcF) formulas. Results. The SI method showed significant...... a significant impact on the prolongation of QT during hypoglycemia. Heart rate correction may also influence the QT during hypoglycemia while the type of insulin is insignificant. Prolongation of QTc in this study did not reach pathologic values suggesting that QTc prolongation cannot fully explain the dead...

  17. Van Vleck correction generalization for complex correlators with multilevel quantization

    CERN Document Server

    Benkevitch, L V; Lonsdale, C J; Cappallo, R J; Oberoi, D; Erickson, P J; Baker, K A V

    2016-01-01

    Remote sensing with phased antenna arrays is based on measurement of the cross-correlations between the signals from each antenna pair. Digital correlators have systematic errors due to the quantization losses. The correlation errors allow substantial abatement based on the assumption that the analog signals are stochastic processes sampled from a statistical distribution (usually the Gaussian). The correlation correction technique is named after Van Vleck who was the first to apply it to two-level clipping quantizers. The correction is especially important for high correlation levels, e.g. in studies of solar radio emissions. We offer a generalized method that for every antenna pair inputs the quantized signals' covariance and standard deviations, and outputs high-precision estimates of the analog correlation. Although correlation correction methods have been extensively investigated in the past, there are several problems that, as far as we know, have not been published yet. We consider a very general quant...

  18. A Quantum Correction To Chaos

    CERN Document Server

    Fitzpatrick, A Liam

    2016-01-01

    We use results on Virasoro conformal blocks to study chaotic dynamics in CFT$_2$ at large central charge c. The Lyapunov exponent $\\lambda_L$, which is a diagnostic for the early onset of chaos, receives $1/c$ corrections that may be interpreted as $\\lambda_L = \\frac{2 \\pi}{\\beta} \\left( 1 + \\frac{12}{c} \\right)$. However, out of time order correlators receive other equally important $1/c$ suppressed contributions that do not have such a simple interpretation. We revisit the proof of a bound on $\\lambda_L$ that emerges at large $c$, focusing on CFT$_2$ and explaining why our results do not conflict with the analysis leading to the bound. We also comment on relationships between chaos, scattering, causality, and bulk locality.

  19. Pileup correction of microdosimetric spectra

    CERN Document Server

    Langen, K M; Lennox, A J; Kroc, T K; De Luca, P M

    2002-01-01

    Microdosimetric spectra were measured at the Fermilab neutron therapy facility using low pressure proportional counters operated in pulse mode. The neutron beam has a very low duty cycle (<0.1%) and consequently a high instantaneous dose rate which causes distortions of the microdosimetric spectra due to pulse pileup. The determination of undistorted spectra at this facility necessitated (i) the modified operation of the proton accelerator to reduce the instantaneous dose rate and (ii) the establishment of a computational procedure to correct the measured spectra for remaining pileup distortions. In support of the latter effort, two different pileup simulation algorithms using analytical and Monte-Carlo-based approaches were developed. While the analytical algorithm allows a detailed analysis of pileup processes it only treats two-pulse and three-pulse pileup and its validity is hence restricted. A Monte-Carlo-based pileup algorithm was developed that inherently treats all degrees of pileup. This algorithm...

  20. Radiative corrections in bumblebee electrodynamics

    Directory of Open Access Journals (Sweden)

    R.V. Maluf

    2015-10-01

    Full Text Available We investigate some quantum features of the bumblebee electrodynamics in flat spacetimes. The bumblebee field is a vector field that leads to a spontaneous Lorentz symmetry breaking. For a smooth quadratic potential, the massless excitation (Nambu–Goldstone boson can be identified as the photon, transversal to the vacuum expectation value of the bumblebee field. Besides, there is a massive excitation associated with the longitudinal mode and whose presence leads to instability in the spectrum of the theory. By using the principal-value prescription, we show that no one-loop radiative corrections to the mass term is generated. Moreover, the bumblebee self-energy is not transverse, showing that the propagation of the longitudinal mode cannot be excluded from the effective theory.

  1. Quantum Corrections in Massive Gravity

    CERN Document Server

    de Rham, Claudia; Ribeiro, Raquel H

    2013-01-01

    We compute the one-loop quantum corrections to the potential of ghost-free massive gravity. We show how the mass of external matter fields contribute to the running of the cosmological constant, but do not change the ghost-free structure of the massive gravity potential at one-loop. When considering gravitons running in the loops, we show how the structure of the potential gets destabilized at the quantum level, but in a way which would never involve a ghost with a mass smaller than the Planck scale. This is done by explicitly computing the one-loop effective action and supplementing it with the Vainshtein mechanism. We conclude that to one-loop order the special mass structure of ghost-free massive gravity is technically natural.

  2. Quantum corrections in massive gravity

    Science.gov (United States)

    de Rham, Claudia; Heisenberg, Lavinia; Ribeiro, Raquel H.

    2013-10-01

    We compute the one-loop quantum corrections to the potential of ghost-free massive gravity. We show how the mass of external matter fields contributes to the running of the cosmological constant, but does not change the ghost-free structure of the massive gravity potential at one-loop. When considering gravitons running in the loops, we show how the structure of the potential gets destabilized at the quantum level, but in a way which would never involve a ghost with a mass smaller than the Planck scale. This is done by explicitly computing the one-loop effective action and supplementing it with the Vainshtein mechanism. We conclude that to one-loop order the special mass structure of ghost-free massive gravity is technically natural.

  3. Correct Linearization of Einstein's Equations

    Directory of Open Access Journals (Sweden)

    Rabounski D.

    2006-04-01

    Full Text Available Routinely, Einstein’s equations are be reduced to a wave form (linearly independent of the second derivatives of the space metric in the absence of gravitation, the space rotation and Christoffel’s symbols. As shown herein, the origin of the problem is the use of the general covariant theory of measurement. Herein the wave form of Einstein’s equations is obtained in terms of Zelmanov’s chronometric invariants (physically observable projections on the observer’s time line and spatial section. The equations so obtained depend solely upon the second derivatives, even for gravitation, the space rotation and Christoffel’s symbols. The correct linearization proves that the Einstein equations are completely compatible with weak waves of the metric.

  4. A quantum correction to chaos

    Energy Technology Data Exchange (ETDEWEB)

    Fitzpatrick, A. Liam [Department of Physics, Boston University,590 Commonwealth Avenue, Boston, MA 02215 (United States); Kaplan, Jared [Department of Physics and Astronomy, Johns Hopkins University,3400 N. Charles St, Baltimore, MD 21218 (United States)

    2016-05-12

    We use results on Virasoro conformal blocks to study chaotic dynamics in CFT{sub 2} at large central charge c. The Lyapunov exponent λ{sub L}, which is a diagnostic for the early onset of chaos, receives 1/c corrections that may be interpreted as λ{sub L}=((2π)/β)(1+(12/c)). However, out of time order correlators receive other equally important 1/c suppressed contributions that do not have such a simple interpretation. We revisit the proof of a bound on λ{sub L} that emerges at large c, focusing on CFT{sub 2} and explaining why our results do not conflict with the analysis leading to the bound. We also comment on relationships between chaos, scattering, causality, and bulk locality.

  5. Static Correctness of Hierarchical Procedures

    DEFF Research Database (Denmark)

    Schwartzbach, Michael Ignatieff

    1990-01-01

    A system of hierarchical, fully recursive types in a truly imperative language allows program fragments written for small types to be reused for all larger types. To exploit this property to enable type-safe hierarchical procedures, it is necessary to impose a static requirement on procedure calls....... We introduce an example language and prove the existence of a sound requirement which preserves static correctness while allowing hierarchical procedures. This requirement is further shown to be optimal, in the sense that it imposes as few restrictions as possible. This establishes the theoretical...... basis for a general type hierarchy with static type checking, which enables first-order polymorphism combined with multiple inheritance and specialization in a language with assignments. We extend the results to include opaque types. An opaque version of a type is different from the original but has...

  6. Severe asthma in children.

    Science.gov (United States)

    Guilbert, Theresa W; Bacharier, Leonard B; Fitzpatrick, Anne M

    2014-01-01

    Severe asthma in children is characterized by sustained symptoms despite treatment with high doses of inhaled corticosteroids or oral corticosteroids. Children with severe asthma may fall into 2 categories, difficult-to-treat asthma or severe therapy-resistant asthma. Difficult-to-treat asthma is defined as poor control due to an incorrect diagnosis or comorbidities, or poor adherence due to adverse psychological or environmental factors. In contrast, treatment resistant is defined as difficult asthma despite management of these factors. It is increasingly recognized that severe asthma is a highly heterogeneous disorder associated with a number of clinical and inflammatory phenotypes that have been described in children with severe asthma. Guideline-based drug therapy of severe childhood asthma is based primarily on extrapolated data from adult studies. The recommendation is that children with severe asthma be treated with higher-dose inhaled or oral corticosteroids combined with long-acting β-agonists and other add-on therapies, such as antileukotrienes and methylxanthines. It is important to identify and address the influences that make asthma difficult to control, including reviewing the diagnosis and removing causal or aggravating factors. Better definition of the phenotypes and better targeting of therapy based upon individual patient phenotypes is likely to improve asthma treatment in the future.

  7. Severe asthma in children

    Science.gov (United States)

    Guilbert, TW; Bacharier, LB; Fitzpatrick, AM

    2015-01-01

    Severe asthma in children is characterized by sustained symptoms despite treatment with high doses of ICS or oral corticosteroids. Children with severe asthma may fall into two categories, difficult-to-treat asthma or severe therapy-resistant asthma. Difficult-to-treat asthma is defined as poor control due to an incorrect diagnosis or comorbidities, poor adherence due to adverse psychological or environmental factors. In contrast, treatment-resistant is defined as difficult asthma despite management of these factors. It is increasingly recognized that severe asthma is a highly heterogeneous disorder associated with a number of clinical and inflammatory phenotypes that have been described in children with severe asthma. Guideline based drug therapy of severe childhood asthma is based primarily on extrapolated data from adult studies. The recommendation is that children with severe asthma be treated with higher-dose inhaled or oral corticosteroids combined with long-acting beta-agonists and other add on therapies such as antileukotrienes and methylxanthines. It is important to identify and address the influences that make asthma difficult to control including reviewing the diagnosis and the removal of causal or aggravating factors. Better definition of the phenotypes and better targeting of therapy based upon individual patient phenotypes is likely to improve asthma treatment in the future. PMID:25213041

  8. Characterizing bias correction uncertainty in wheat yield predictions

    Science.gov (United States)

    Ortiz, Andrea Monica; Jones, Julie; Freckleton, Robert; Scaife, Adam

    2017-04-01

    Farming systems are under increased pressure due to current and future climate change, variability and extremes. Research on the impacts of climate change on crop production typically rely on the output of complex Global and Regional Climate Models, which are used as input to crop impact models. Yield predictions from these top-down approaches can have high uncertainty for several reasons, including diverse model construction and parameterization, future emissions scenarios, and inherent or response uncertainty. These uncertainties propagate down each step of the 'cascade of uncertainty' that flows from climate input to impact predictions, leading to yield predictions that may be too complex for their intended use in practical adaptation options. In addition to uncertainty from impact models, uncertainty can also stem from the intermediate steps that are used in impact studies to adjust climate model simulations to become more realistic when compared to observations, or to correct the spatial or temporal resolution of climate simulations, which are often not directly applicable as input into impact models. These important steps of bias correction or calibration also add uncertainty to final yield predictions, given the various approaches that exist to correct climate model simulations. In order to address how much uncertainty the choice of bias correction method can add to yield predictions, we use several evaluation runs from Regional Climate Models from the Coordinated Regional Downscaling Experiment over Europe (EURO-CORDEX) at different resolutions together with different bias correction methods (linear and variance scaling, power transformation, quantile-quantile mapping) as input to a statistical crop model for wheat, a staple European food crop. The objective of our work is to compare the resulting simulation-driven hindcasted wheat yields to climate observation-driven wheat yield hindcasts from the UK and Germany in order to determine ranges of yield

  9. Costs of RCRA corrective action: Interim report

    Energy Technology Data Exchange (ETDEWEB)

    Tonn, B.; Russell, M.; Hwang Ho-Ling; Goeltz, R. (Oak Ridge National Lab., TN (United States)); Warren, J. (Research Triangle Inst., Research Triangle Park, NC (United States))

    1991-09-01

    This report estimates the cost of the corrective action provisions of the Resource Conservation and Recovery Act (RCRA) for all non-federal facilities in the United States. RCRA is the federal law which regulates the treatment, storage, disposal, and recovery of hazardous waste. The 1984 amendment to RCRA, known as the Hazardous and Solid Waste Amendments, stipulates that facilities that treat, store or dispose of hazardous wastes (TSDs) must remediate situations where hazardous wastes have escaped into the environment from their solid waste management units (SWMUs). The US Environmental Protection Agency (USEPA 1990a), among others, believes that the costs of RCRA corrective action could rival the costs of SUPERFUND. Evaluated herein are costs associated with actual remedial actions. The remedial action cost estimating program developed by CH2M Hill is known as the Cost of Remedial Action Model (CORA). It provides cost estimates, in 1987 dollars, by technology used to remediate hazardous waste sites. Rules were developed to categorize each SWMU in the RTI databases by the kinds of technologies that would be used to remediate them. Results were then run through CORA using various assumptions for variable values that could not be drawn from the RTI databases and that did not have CORA supplied default values. Cost estimates were developed under several scenarios. The base case assumes a TSD and SWMU universe equal to that captured in the RTI databases, a point of compliance at the SWMU boundary with no ability to shift wastes from SWMU to SWMU, and a best-as-practical clean-up to health-based standards. 11 refs., 12 figs., 12 tabs.

  10. Correction to Kane et al. (2016).

    Science.gov (United States)

    Kane, Michael J; Meier, Matt E; Smeekens, Bridget A; Gross, Georgina M; Chun, Charlotte A; Silvia, Paul J; Kwapil, Thomas R

    2016-12-01

    Reports an error in "Individual differences in the executive control of attention, memory, and thought, and their associations with schizotypy" by Michael J. Kane, Matt E. Meier, Bridget A. Smeekens, Georgina M. Gross, Charlotte A. Chun, Paul J. Silvia and Thomas R. Kwapil (Journal of Experimental Psychology: General, 2016[Aug], Vol 145[8], 1017-1048). There were errors in Table 3 and Table 7 (these transcription errors were limited to descriptive statistics in the Tables and did not affect any inferential statistics). In Table 3, the ARRO-TUT and LETT-TUT variables had incorrect values for Mean [95% CI], SD, Skew, Kurtosis, and N. In Table 7, the same values (plus Min and Max) were incorrect for the SEM-SART variable. The correct values for these measures are presented in the correction (the values for Min and Max were correct as set in Table 3, but are repeated below for clarity). (The following abstract of the original article appeared in record 2016-29680-001.) A large correlational study took a latent-variable approach to the generality of executive control by testing the individual-differences structure of executive-attention capabilities and assessing their prediction of schizotypy, a multidimensional construct (with negative, positive, disorganized, and paranoid factors) conveying risk for schizophrenia. Although schizophrenia is convincingly linked to executive deficits, the schizotypy literature is equivocal. Subjects completed tasks of working memory capacity (WMC), attention restraint (inhibiting prepotent responses), and attention constraint (focusing visual attention amid distractors), the latter 2 in an effort to fractionate the "inhibition" construct. We also assessed mind-wandering propensity (via in-task thought probes) and coefficient of variation in response times (RT CoV) from several tasks as more novel indices of executive attention. WMC, attention restraint, attention constraint, mind wandering, and RT CoV were correlated but separable

  11. A new nonuniformity correction algorithm for infrared line scanners

    Science.gov (United States)

    Sui, Jing; Jin, Wei-qi; Dong, Li-quan; Wang, Xia

    2006-05-01

    Nonuniformity correction (NUC) is a critical task for achieving higher performances in modern infrared imaging systems. The striping fixed pattern noise produced by the scanning-type infrared imaging system can hardly be removed clearly by many scene-based non-uniformity correction methods, which can work effectively for staring focal plane arrays (FPA). We proposed an improved nonuniformity algorithm that corrects the aggregate nonuniformity by two steps for the infrared line scanners (IRLS). The novel contribution in our approach is the integration of local constant statistics (LCS) constraint and neural networks. First, the nonuniformity due to the readout electronics is corrected by treating every row of pixels as one channel and normalizing the channel outputs so that each channel produces pixels with the same mean and standard deviation as median value of the local channels statistics. Second, for IRLS every row is generated by pushbrooming one detector on line sensors, we presume each detector has one neuron with a weight and an offset as correction parameters, which can update column by column recursively at Least Mean Square sense. A one-dimensional median filter is used to produce ideal output of linear neural network and some optimization strategies are added to increase the robustness of learning process. Applications to both simulated and real infrared images demonstrated that this algorithm is self-adaptive and able to complete NUC by only one frames. If the nonuniformity is not so severe then only the first step can obtain a good correction result. Combination of two steps can achieve a higher correction level and remove stripe pattern noise clearly.

  12. An attempt to correct for the fading in million year old basaltic rocks

    DEFF Research Database (Denmark)

    Morthekai, P.; Jain, Mayank; Cunha, Pedro P.;

    2011-01-01

    The use of feldspar for luminescence dating has been restricted because of anomalous fad-ing. This has made its application to several important geological problems such as volcanic terrains difficult. Presently, two correction procedures are used to correct for anomalous fading. The present stud...

  13. A Study of IR Loss Correction Methodologies for Commercially Available Pyranometers

    Energy Technology Data Exchange (ETDEWEB)

    Long, Chuck; Andreas, Afshin; Augustine, John; Dooraghi, Mike; Habte, Aron; Hall, Emiel; Kutchenreiter, Mark; McComiskey, Allison; Reda, Ibrahim; Sengupta, Manajit

    2017-03-24

    This presentation provides a high-level overview of a study of IR Loss Connection Methodologies for Commercially Available Pyranometers. The IR Loss Corrections Study is investigating how various correction methodologies work for several makes and models of commercially available pyranometers in common use, both when operated in ventilators with DC fans and without ventilators, as when they are typically calibrated.

  14. How EFL Students Can Use Google to Correct Their "Untreatable" Written Errors

    Science.gov (United States)

    Geiller, Luc

    2014-01-01

    This paper presents the findings of an experiment in which a group of 17 French post-secondary EFL learners used Google to self-correct several "untreatable" written errors. Whether or not error correction leads to improved writing has been much debated, some researchers dismissing it is as useless and others arguing that error feedback…

  15. ADIPONECTIN IN SEVERE PREECLAMPSIA

    Science.gov (United States)

    Nien, Jyh Kae; Mazaki-Tovi, Shali; Romero, Roberto; Erez, Offer; Kusanovic, Juan Pedro; Gotsch, Francesca; Pineles, Beth L.; Gomez, Ricardo; Edwin, Samuel; Mazor, Moshe; Espinoza, Jimmy; Yoon, Bo Hyun; Hassan, Sonia S.

    2008-01-01

    Aims Adiponectin is an adipokine with insulin-sensitizing, anti-atherogenic, anti-inflammatory and angiogenic properties. The aims of this study were to determine whether maternal plasma adiponectin concentrations differ between patients with severe preeclampsia and those with normal pregnancies, and to explore the relationship between plasma adiponectin and the results of Doppler velocimetry of the uterine arteries. Methods This case-control study included two groups: (1) patients with severe preeclampsia (n=50) and (2) patients with normal pregnancies (n=150). Pulsed-wave and color Doppler ultrasound examination of the uterine arteries were performed. Plasma adiponectin concentrations were determined by ELISA. Non-parametric statistics were used for analysis. Results (1) Patients with severe preeclampsia had a higher median plasma concentration of adiponectin than that of normal pregnant women. (2) The median plasma adiponectin concentration did not differ between women with severe preeclampsia who had a high impedance to blood flow in the uterine arteries and those with normal impedance to blood flow. (3) Among patients with normal pregnancies, plasma adiponectin concentrations were negatively correlated with BMI in the first trimester and at sampling. Conclusions Women with severe preeclampsia have a higher median plasma concentration of adiponectin than that of normal pregnant women. This may reflect a compensatory feedback mechanism to the metabolically-altered, anti-angiogenic and pro-atherogenic state of severe preeclampsia. PMID:17919115

  16. Amplitude path corrections for regional phases in China

    Energy Technology Data Exchange (ETDEWEB)

    Phillips, W.S.; Velasco, A.A.; Taylor, S.R.; Randall, G.E.

    1998-12-31

    The authors investigate the effectiveness of amplitude path corrections for regional phases on seismic event discrimination and magnitude estimation. Waveform data from digital stations in China for regional, shallow (< 50 km) events were obtained from the IRIS Data Management Center (DMC) for years 1986 to 1996 using the USGS Preliminary Determination of Epicenters (PDE) and the Chinese State Seismological Bureau (SSB) catalogs. For each event, the amplitudes for each regional phase (P{sub n}, P{sub g}, S{sub n}, L{sub g}) were measured, as well as the P{sub g} and L{sub g} coda. Measured amplitudes were corrected for source scaling using estimates of m{sub b} and for distance using a power law that accounts for attenuation and spreading. The amplitude residuals were interpolated and mapped as 2-D amplitude correction surfaces. The authors employ several methods to create the amplitude correction surfaces: a waveguide method, and two interpolation methods (Baysian kriging and a circular moving window mean smoother). They explore the sensitivities of the surfaces to the method and to regional propagation, and apply these surfaces to correct amplitude data to reduce scatter in discrimination ratios and magnitude estimates.

  17. Advanced hardware design for error correcting codes

    CERN Document Server

    Coussy, Philippe

    2015-01-01

    This book provides thorough coverage of error correcting techniques. It includes essential basic concepts and the latest advances on key topics in design, implementation, and optimization of hardware/software systems for error correction. The book’s chapters are written by internationally recognized experts in this field. Topics include evolution of error correction techniques, industrial user needs, architectures, and design approaches for the most advanced error correcting codes (Polar Codes, Non-Binary LDPC, Product Codes, etc). This book provides access to recent results, and is suitable for graduate students and researchers of mathematics, computer science, and engineering. • Examines how to optimize the architecture of hardware design for error correcting codes; • Presents error correction codes from theory to optimized architecture for the current and the next generation standards; • Provides coverage of industrial user needs advanced error correcting techniques.

  18. ON-THE-FLY GARBAGE COLLECTION FOR SEVERAL MUTATORS

    NARCIS (Netherlands)

    JONKER, JE

    1992-01-01

    An algorithm is given for on-the-fly garbage collection in the presence of several mutators. It uses two colours and is a generalization of Ben-Ari's algorithm (1984). The correctness proof is based on the lexical orderings of several tuples of state space functions. It is shown that in a certain se

  19. ON-THE-FLY GARBAGE COLLECTION FOR SEVERAL MUTATORS

    NARCIS (Netherlands)

    JONKER, JE

    An algorithm is given for on-the-fly garbage collection in the presence of several mutators. It uses two colours and is a generalization of Ben-Ari's algorithm (1984). The correctness proof is based on the lexical orderings of several tuples of state space functions. It is shown that in a certain

  20. Pulse compressor with aberration correction

    Energy Technology Data Exchange (ETDEWEB)

    Mankos, Marian [Electron Optica, Inc., Palo Alto, CA (United States)

    2015-11-30

    In this SBIR project, Electron Optica, Inc. (EOI) is developing an electron mirror-based pulse compressor attachment to new and retrofitted dynamic transmission electron microscopes (DTEMs) and ultrafast electron diffraction (UED) cameras for improving the temporal resolution of these instruments from the characteristic range of a few picoseconds to a few nanoseconds and beyond, into the sub-100 femtosecond range. The improvement will enable electron microscopes and diffraction cameras to better resolve the dynamics of reactions in the areas of solid state physics, chemistry, and biology. EOI’s pulse compressor technology utilizes the combination of electron mirror optics and a magnetic beam separator to compress the electron pulse. The design exploits the symmetry inherent in reversing the electron trajectory in the mirror in order to compress the temporally broadened beam. This system also simultaneously corrects the chromatic and spherical aberration of the objective lens for improved spatial resolution. This correction will be found valuable as the source size is reduced with laser-triggered point source emitters. With such emitters, it might be possible to significantly reduce the illuminated area and carry out ultrafast diffraction experiments from small regions of the sample, e.g. from individual grains or nanoparticles. During phase I, EOI drafted a set of candidate pulse compressor architectures and evaluated the trade-offs between temporal resolution and electron bunch size to achieve the optimum design for two particular applications with market potential: increasing the temporal and spatial resolution of UEDs, and increasing the temporal and spatial resolution of DTEMs. Specialized software packages that have been developed by MEBS, Ltd. were used to calculate the electron optical properties of the key pulse compressor components: namely, the magnetic prism, the electron mirror, and the electron lenses. In the final step, these results were folded

  1. Operative management of severe constipation.

    Science.gov (United States)

    Lahr, S J; Lahr, C J; Srinivasan, A; Clerico, E T; Limehouse, V M; Serbezov, I K

    1999-12-01

    postoperative deaths. The complication rate was 6.1 per cent (small bowel obstruction, 7; anastomotic leak, 2; ureteral stenosis, 2; and patch erosion, 1). In our experience, severe surgical constipation can be due to colonic inertia, pelvic hiatal hernia, or both. Careful preoperative evaluation identifies these disorders, and surgical therapy aimed at correction of anatomic and physiologic defects results in high patient satisfaction and improvement in bowel function.

  2. Comparison of Blepharoptosis Correction Using Müller-aponeurosis Composite Flap Advancement and Frontalis Muscle Transfer

    Directory of Open Access Journals (Sweden)

    David Dae Hawan Park, MD, PhD

    2014-08-01

    Conclusions: In our study, we confirmed that Müller aponeurosis composite flap advancement and the frontalis transfer technique are both effective in the correction of severe blepharoptosis; our results showed no significant differences between the 2 techniques.

  3. Magnetic Resonance-based Motion Correction for Quantitative PET in Simultaneous PET-MR Imaging.

    Science.gov (United States)

    Rakvongthai, Yothin; El Fakhri, Georges

    2017-07-01

    Motion degrades image quality and quantitation of PET images, and is an obstacle to quantitative PET imaging. Simultaneous PET-MR offers a tool that can be used for correcting the motion in PET images by using anatomic information from MR imaging acquired concurrently. Motion correction can be performed by transforming a set of reconstructed PET images into the same frame or by incorporating the transformation into the system model and reconstructing the motion-corrected image. Several phantom and patient studies have validated that MR-based motion correction strategies have great promise for quantitative PET imaging in simultaneous PET-MR. Copyright © 2017 Elsevier Inc. All rights reserved.

  4. DEFINITION OF TYPOS IN ANSWER OF STUDENT IN KNOWN CORRECT ANSWER

    Directory of Open Access Journals (Sweden)

    Maria V. Biryukova

    2015-01-01

    Full Text Available The paper describes method of typo detection in the answers for the questions with open answers. In such questions we know one or several correct answers defining relatively small dictionary of correct words contrasting the usual case of looking for typos in arbitrary text. This fact allows using more complex analysis methods and finding more possible typos, such as extra or missing separators. A typo correction module for the Correct Writing question type (for Moodle LMS was developed using proposed methods. 

  5. Corrections to the Vienna Code

    Science.gov (United States)

    Since the publication of the Vienna Code, several errors have been noticed. Most are minor punctuation or cross-referencing errors, or, in the Appendices, inconsistencies in abbreviation, but there was one important omission from Art. 37, the misspelling of two specific epithets and the transpositio...

  6. [Severe depression : psychoanalysis].

    Science.gov (United States)

    Bouvet de la Maisonneuve, O

    2009-12-01

    The indication for psychoanalysis in severe depression is not clear. And yet, demands for this type of intervention are increasing, despite the absence of any form of consensus on the subject. Freud considered depression as a failure of analytical efforts and, based on this observation, revised his theory, in particular to include the notions of narcissism and the death drive. Many analysts have been reluctant to follow his teachings on this last point and provide depressed patients with analytical-type therapies aimed at restoring narcissism. Melanie Klein pushed Freud's ideas about depression even further and brought such therapies back to the heart of analytical practice. Jacques Lacan took the debate to another level by proposing an overhaul of the principles on which analysis has been based. Today, while following certain precautionary rules, true psychoanalyses can be proposed to patients with severe depression, whether of the bipolar, recurring or even neurotic type that can reach this level of severity.

  7. Rulison Site corrective action report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-09-01

    Project Rulison was a joint US Atomic Energy Commission (AEC) and Austral Oil Company (Austral) experiment, conducted under the AEC`s Plowshare Program, to evaluate the feasibility of using a nuclear device to stimulate natural gas production in low-permeability gas-producing geologic formations. The experiment was conducted on September 10, 1969, and consisted of detonating a 40-kiloton nuclear device at a depth of 2,568 m below ground surface (BGS). This Corrective Action Report describes the cleanup of petroleum hydrocarbon- and heavy-metal-contaminated sediments from an old drilling effluent pond and characterization of the mud pits used during drilling of the R-EX well at the Rulison Site. The Rulison Site is located approximately 65 kilometers (40 miles) northeast of Grand Junction, Colorado. The effluent pond was used for the storage of drilling mud during drilling of the emplacement hole for the 1969 gas stimulation test conducted by the AEC. This report also describes the activities performed to determine whether contamination is present in mud pits used during the drilling of well R-EX, the gas production well drilled at the site to evaluate the effectiveness of the detonation in stimulating gas production. The investigation activities described in this report were conducted during the autumn of 1995, concurrent with the cleanup of the drilling effluent pond. This report describes the activities performed during the soil investigation and provides the analytical results for the samples collected during that investigation.

  8. Severe Combined Immunodeficiency Disorders.

    Science.gov (United States)

    Chinn, Ivan K; Shearer, William T

    2015-11-01

    Severe combined immunodeficiency disorders represent pediatric emergencies due to absence of adaptive immune responses to infections. The conditions result from either intrinsic defects in T-cell development (ie, severe combined immunodeficiency disease [SCID]) or congenital athymia (eg, complete DiGeorge anomaly). Hematopoietic stem cell transplant provides the only clinically approved cure for SCID, although gene therapy research trials are showing significant promise. For greatest survival, patients should undergo transplant before 3.5 months of age and before the onset of infections. Newborn screening programs have yielded successful early identification and treatment of infants with SCID and congenital athymia in the United States.

  9. Recent Developments in the CONRAD Code regarding Experimental Corrections

    Directory of Open Access Journals (Sweden)

    Noguère G.

    2013-03-01

    Full Text Available The CONRAD code is an object-oriented software tool developed at CEA Cadarache since 2005 to deal with problems arising during the evaluation process (data assimilation and analysis, physical modelling, propagation of uncertainties…. This paper will present recent developments concerning the experimental corrections, which are required when a neutron resonance shape analysis is performed. Several experimental aspects are detailed in this work: the possibility to use spectra in energy as well as in time, the implementation of both analytical (Chi-Square and Monte-Carlo resolution functions, the sample homogeneity corrections using log-normal distributions. Each development aspect is illustrated with several examples and comparisons with other resonance analysis codes (SAMMY, REFIT.

  10. Self-correction coil: operation mechanism of self-correction coil

    Energy Technology Data Exchange (ETDEWEB)

    Hosoyama, K.

    1983-06-01

    We discuss here the operation mechanism of self-correction coil with a simple model. At the first stage, for the ideal self-correction coil case we calculate the self-inductance L of self-correction coil, the mutual inductance M between the error field coil and the self-correction coil, and using the model the induced curent in the self-correction coil by the external magnetic error field and induced magnetic field by the self-correction coil. And at the second stage, we extend this calculation method to non-ideal self-correction coil case, there we realize that the wire distribution of self-correction coil is important to get the high enough self-correction effect. For measure of completeness of self-correction effect, we introduce the efficiency eta of self-correction coil by the ratio of induced magnetic field by the self-correction coil and error field. As for the examples, we calculate L, M and eta for two cases; one is a single block approximation of self-correction coil winding and the other is a two block approximation case. By choosing the adequate angles of self-correction coil winding, we can get about 98% efficiency for single block approximation case and 99.8% for two block approximation case. This means that by using the self-correction coil we can improve the field quality about two orders.

  11. Surgical treatment of severe scoliosis and kyphoscoliosis by stages

    Institute of Scientific and Technical Information of China (English)

    TAN Rong; MA Hua-song; ZOU De-wei; WU Ji-gong; CHEN Zhi-ming; ZHOU Xue-feng; ZHOU Jian-wei

    2012-01-01

    Background Although previous reports had reported the use of temporary internal distraction as an aid to correct severe scoliosis,two-stage surgery strategy (less invasive internal distraction followed by posterior correction and instrumentation) has never been reported in the treatment of patients with severe spinal deformity.This study aimed to report the results of the surgical treatment of severe scoliosis and kyphoscoliosis by two-stage and analyse the safety and efficacy of this surgical strategy in the treatment of severe spinal deformities.Methods A total of 15 patients with severe scoliosis,kyphoscoliosis or kyphosis who underwent two-stage surgeries (less invasive internal distraction followed by posterior correction and instrumentation) were studied based on hospital records.Pretreatment radiographs and radiographs taken after first surgery (internal distraction by two small incisions),before second surgery (posterior correction,instrumentation and fusion),one week after second surgery and final follow-up were measured.Subjects were analyzed by age,gender,major coronal curve magnitude,flexibility of major curve,major sagittal curve magnitude before first surgery,after first surgery,before second surgery,after second surgery and at final follow-up.Complications related to two-stage surgeries were noted in each case.Results The average major curve magnitude was 129.4° (range,95° to 175°),reduced 58.9° or 45.4% after first stage surgery and reduced 30.6° or 24.6% after second stage surgery.The loss of correction during the interval between two surgeries was 7.1%.The total major coronal curve correction was 81.4°or 62.9%.At the final follow up,the average loss of correction of major coronal curve was 3.9° and the final average correction rate was 59.7%.The average major sagittal curve magnitude was 80.3° (range,30° to 170°),and the total major sagittal curve correction was 48.2°.Loss of correction averaged 4.0° for major sagittal curve

  12. Proof-Carrying Code with Correct Compilers

    Science.gov (United States)

    Appel, Andrew W.

    2009-01-01

    In the late 1990s, proof-carrying code was able to produce machine-checkable safety proofs for machine-language programs even though (1) it was impractical to prove correctness properties of source programs and (2) it was impractical to prove correctness of compilers. But now it is practical to prove some correctness properties of source programs, and it is practical to prove correctness of optimizing compilers. We can produce more expressive proof-carrying code, that can guarantee correctness properties for machine code and not just safety. We will construct program logics for source languages, prove them sound w.r.t. the operational semantics of the input language for a proved-correct compiler, and then use these logics as a basis for proving the soundness of static analyses.

  13. Automatic Power Factor Correction Using Capacitive Bank

    Directory of Open Access Journals (Sweden)

    Mr.Anant Kumar Tiwari,

    2014-02-01

    Full Text Available The power factor correction of electrical loads is a problem common to all industrial companies. Earlier the power factor correction was done by adjusting the capacitive bank manually [1]. The automated power factor corrector (APFC using capacitive load bank is helpful in providing the power factor correction. Proposed automated project involves measuring the power factor value from the load using microcontroller. The design of this auto-adjustable power factor correction is to ensure the entire power system always preserving unity power factor. The software and hardware required to implement the suggested automatic power factor correction scheme are explained and its operation is described. APFC thus helps us to decrease the time taken to correct the power factor which helps to increase the efficiency.

  14. Effectiveness of Corrective Feedback on Writing

    Institute of Scientific and Technical Information of China (English)

    高砚

    2012-01-01

      This study aims to find out the effectiveness of corrective feedback on ESL writing. By reviewing and analyzing the previous six research studies, the author tries to reveal the most effective way to provide corrective feedback for L2 students and the factors that impact the processing of error feedback. Findings indicated that corrective feedback is helpful for students to improve ESL writing on both accuracy and fluency. Furthermore, correction and direct corrective feedbacks as well as the oral and written meta-linguistic explanation are the most effective ways to help students improving their writing. However, in⁃dividual learner’s difference has influence on processing corrective feedback. At last, limitation of present study and suggestion for future research were made.

  15. Weather-Corrected Performance Ratio

    Energy Technology Data Exchange (ETDEWEB)

    Dierauf, T.; Growitz, A.; Kurtz, S.; Cruz, J. L. B.; Riley, E.; Hansen, C.

    2013-04-01

    Photovoltaic (PV) system performance depends on both the quality of the system and the weather. One simple way to communicate the system performance is to use the performance ratio (PR): the ratio of the electricity generated to the electricity that would have been generated if the plant consistently converted sunlight to electricity at the level expected from the DC nameplate rating. The annual system yield for flat-plate PV systems is estimated by the product of the annual insolation in the plane of the array, the nameplate rating of the system, and the PR, which provides an attractive way to estimate expected annual system yield. Unfortunately, the PR is, again, a function of both the PV system efficiency and the weather. If the PR is measured during the winter or during the summer, substantially different values may be obtained, making this metric insufficient to use as the basis for a performance guarantee when precise confidence intervals are required. This technical report defines a way to modify the PR calculation to neutralize biases that may be introduced by variations in the weather, while still reporting a PR that reflects the annual PR at that site given the project design and the project weather file. This resulting weather-corrected PR gives more consistent results throughout the year, enabling its use as a metric for performance guarantees while still retaining the familiarity this metric brings to the industry and the value of its use in predicting actual annual system yield. A testing protocol is also presented to illustrate the use of this new metric with the intent of providing a reference starting point for contractual content.

  16. Hydroxyethyl starch 130/0.42 versus Ringer's acetate in severe sepsis

    DEFF Research Database (Denmark)

    Perner, Anders; Haase, Nicolai; Guttormsen, Anne B

    2012-01-01

    Hydroxyethyl starch (HES) [corrected] is widely used for fluid resuscitation in intensive care units (ICUs), but its safety and efficacy have not been established in patients with severe sepsis.......Hydroxyethyl starch (HES) [corrected] is widely used for fluid resuscitation in intensive care units (ICUs), but its safety and efficacy have not been established in patients with severe sepsis....

  17. Spatial Light Modulator for wavefront correction

    CERN Document Server

    Vyas, Akondi; Banyal, Ravinder Kumar; Prasad, B Raghavendra

    2009-01-01

    We present a liquid crystal method of correcting the phase of an aberrated wavefront using a spatial light modulator. A simple and efficient lab model has been demonstrated for wavefront correction. The crux of a wavefront correcting system in an adaptive optics system lies in the speed and the image quality that can be achieved. The speeds and the accuracy of wavefront representation using Zernike polynomials have been presented using a very fast method of computation.

  18. Loop corrections to pion and kaon neutrinoproduction

    CERN Document Server

    Siddikov, Marat

    2016-01-01

    In this paper we study the next-to-leading order corrections to deeply virtual pion and kaon production in neutrino experiments. We estimate these corrections in the kinematics of the Minerva experiment at FERMILAB, and find that they are sizable and increase the leading order cross-section by up to a factor of two. We provide a code, which can be used for the evaluation of the cross-sections, taking into account these corrections and employing various GPD models.

  19. Experimental demonstration of topological error correction

    OpenAIRE

    2012-01-01

    Scalable quantum computing can only be achieved if qubits are manipulated fault-tolerantly. Topological error correction - a novel method which combines topological quantum computing and quantum error correction - possesses the highest known tolerable error rate for a local architecture. This scheme makes use of cluster states with topological properties and requires only nearest-neighbour interactions. Here we report the first experimental demonstration of topological error correction with a...

  20. Optimization of neutron monitor data correction algorithms

    Energy Technology Data Exchange (ETDEWEB)

    Paschalis, P. [Nuclear and Particle Physics Section, Physics Department, National and Kapodistrian University of Athens, Zografos 15783, Athens (Greece); Mavromichalaki, H., E-mail: emavromi@phys.uoa.gr [Nuclear and Particle Physics Section, Physics Department, National and Kapodistrian University of Athens, Zografos 15783, Athens (Greece)

    2013-06-21

    Nowadays, several neutron monitor stations worldwide, broadcast their cosmic ray data in real time, in order for the scientific community to be able to use these measurements immediately. In parallel, the development of the Neutron Monitor Database (NMDB; (http://www.nmdb.eu)) which collects all the high resolution real time measurements, allows the implementation of various applications and services by using these data instantly. Therefore, it is obvious that the need for high quality real time data is imperative. The quality of the data is handled by different correction algorithms that filter the real time measurements for undesired instrumental variations. In this work, an optimization of the Median Editor that is currently mainly applied to the neutron monitor data and the recently proposed ANN algorithm based on neural networks is presented. This optimization leads to the implementation of the Median Editor Plus and the ANN Plus algorithms. A direct comparison of these algorithms with the newly appeared Edge Editor is performed and the results are presented.

  1. Working session 4: Preventative and corrective measures

    Energy Technology Data Exchange (ETDEWEB)

    Clark, R. [Golder Federal Services Inc., Redmond, WA (United States); Slama, G. [Framatome, Paris (France)

    1997-02-01

    The Preventive and Corrective Measures working session included 13 members from France, Germany, Japan, Spain, Slovenia, and the United States. Attendee experience included regulators, utilities, three steam generator vendors, consultants and researchers. Discussions centered on four principal topics: (1) alternate materials, (2) mechanical mitigation, (3) maintenance, and (4) water chemistry. New or replacement steam generators and original equipment steam generators were separately addressed. Four papers were presented to the session, to provide information and stimulate various discussion topics. Topics discussed and issues raised during the several meeting sessions are provided below, followed by summary conclusions and recommendations on which the group was able to reach a majority consensus. The working session was composed of individuals with diverse experience and varied areas of specialized expertise. The somewhat broad range of topics addressed by the group at times saw discussion participation by only a few individuals. As in any technical meeting where all are allowed the opportunity to speak their mind, straying from an Individual topic was not unusual. Where useful, these stray topics are also presented below within the context In which they occurred. The main categories of discussion were: minimize sludge; new steam generators; maintenance; mechanical mitigation; water chemistry.

  2. Immediate error correction process following sleep deprivation

    National Research Council Canada - National Science Library

    HSIEH, SHULAN; CHENG, I‐CHEN; TSAI, LING‐LING

    2007-01-01

    ...) participated in this study. Participants performed a modified letter flanker task and were instructed to make immediate error corrections on detecting performance errors. Event‐related potentials (ERPs...

  3. Quantum corrections to Schwarzschild black hole

    Energy Technology Data Exchange (ETDEWEB)

    Calmet, Xavier; El-Menoufi, Basem Kamal [University of Sussex, Department of Physics and Astronomy, Brighton (United Kingdom)

    2017-04-15

    Using effective field theory techniques, we compute quantum corrections to spherically symmetric solutions of Einstein's gravity and focus in particular on the Schwarzschild black hole. Quantum modifications are covariantly encoded in a non-local effective action. We work to quadratic order in curvatures simultaneously taking local and non-local corrections into account. Looking for solutions perturbatively close to that of classical general relativity, we find that an eternal Schwarzschild black hole remains a solution and receives no quantum corrections up to this order in the curvature expansion. In contrast, the field of a massive star receives corrections which are fully determined by the effective field theory. (orig.)

  4. Bayesian long branch attraction bias and corrections.

    Science.gov (United States)

    Susko, Edward

    2015-03-01

    Previous work on the star-tree paradox has shown that Bayesian methods suffer from a long branch attraction bias. That work is extended to settings involving more taxa and partially resolved trees. The long branch attraction bias is confirmed to arise more broadly and an additional source of bias is found. A by-product of the analysis is methods that correct for biases toward particular topologies. The corrections can be easily calculated using existing Bayesian software. Posterior support for a set of two or more trees can thus be supplemented with corrected versions to cross-check or replace results. Simulations show the corrections to be highly effective.

  5. A Global Correction to PPMXL Proper Motions

    CERN Document Server

    Vickers, John J; Grebel, Eva K

    2016-01-01

    In this paper we notice that extragalactic sources seem to have non-zero proper motions in the PPMXL proper motion catalog. We collect a large, all-sky sample of extragalactic objects and fit their reported PPMXL proper motions to an ensemble of spherical harmonics in magnitude shells. A magnitude dependent proper motion correction is thus constructed. This correction is applied to a set of fundamental radio sources, quasars, and is compared to similar corrections to assess its utility. We publish, along with this paper, code which may be used to correct proper motions in the PPMXL catalog over the full sky which have 2 Micron All Sky Survey photometry.

  6. Supersymmetric radiative corrections at large tan {beta}

    Energy Technology Data Exchange (ETDEWEB)

    Logan, H.E.

    2001-02-20

    In the minimal supersymmetric extension of the Standard Model (MSSM), fermion masses and Yukawa couplings receive radiative corrections at one loop from diagrams involving the supersymmetric particles. The corrections to the relation between down-type fermion masses and Yukawa couplings are enhanced by tan {beta}, which makes them potentially very significant at large tan {beta}. These corrections affect a wide range of processes in the MSSM, including neutral and charged Higgs phenomenology, rare B meson decays, and renormalization of the CKM matrix. We give a pedagogical review of the sources and phenomenological effects of these corrections.

  7. Electronic crosstalk correction for terra long wave infrared photovoltaic bands

    Science.gov (United States)

    Sun, Junqiang; Madhavan, Sriharsha; Xiong, Xiaoxiong; Wang, Menghua

    2014-11-01

    The MODerate-resolution Imaging Spectroradiometer (MODIS) is one of the primary instruments in the National Aeronautics and Space Administration (NASA) Earth Observing System (EOS). The first MODIS instrument was launched in December 1999 on-board the Terra spacecraft. MODIS has 36 bands, among which 27-30 are Long Wave Infrared (LWIR) PhotoVoltaic (PV) bands covering a wavelength range from 6.72 μm to 9.73 μm. It has been found that there is severe contamination in Terra band 27 from other three bands due to crosstalk of signals among them. The crosstalk effect induces strong striping in the Earth View (EV) images and causes large long-term drift in the EV Brightness Temperature (BT) in the band. An algorithm using a linear approximation derived from on-orbit lunar observations has been developed to correct the crosstalk effect for band 27. It was demonstrated that the crosstalk correction can substantially reduce the striping in the EV images and significantly remove the long-term drift in the EV BT. In this paper, it is shown that other three LWIR PV bands are also contaminated by the crosstalk of signals among themselves. The effect induces strong striping artifacts and large long-term drifts in these bands as similarly observed in band 27. The crosstalk correction algorithm previously developed is applied to correct the crosstalk effect. It is demonstrated that the crosstalk correction successfully reduces the striping in the EV images and removes long-term drifts in the EV BT in bands 28-30 as was done similarly for band 27. The crosstalk correction algorithm can thus substantially improve both the image quality and radiometric accuracy of the LWIR PV bands Level 1B (L1B) products. The algorithm can be applied to other MODIS bands and/or other remote sensors that exhibit an electronic crosstalk effect.

  8. Correction of Anophthalmic Enophthalmos with a Three-Staged Procedure: Two Case Reports

    Directory of Open Access Journals (Sweden)

    Tomohiro Minagawa

    2011-01-01

    Full Text Available Surgical correction of an anophthalmic enophthalmos secondary to inappropriate repair of the eye socket involves several difficult aesthetic issues associated with long-term use of a poorly fitting prosthetic eye. In this paper, we present two cases of anophthalmic enophthalmos. During the treatment of the first patient, unsatisfactory cosmetic problems including lower eyelid retraction, hypoglobus, and severe upper eyelid ptosis were revealed. Accordingly, a three-staged procedure was performed on the second patient, including autologous augmentation of the eye socket, correction of lower eyelid retraction with a cartilage graft, and a frontalis sling procedure to correct upper eyelid ptosis.

  9. Correction of tuberous breasts using the unfolded subareolar gland flap.

    Science.gov (United States)

    Oroz-Torres, Javier; Pelay-Ruata, María-Josefa; Escolán-Gonzalvo, Nieves; Jordán-Palomar, Elena

    2014-08-01

    In this retrospective study, the authors present 12 years of experience using a modified Puckett's technique with a double unfolded strictly subareolar glandular flap for surgical correction of the deformity known as "tuberous breast." In 1976, Rees and Aston documented this congenital malformation of the mammary glands in women. Its cause is unknown, and it affects adolescent girls with varying severity uni- or bilaterally. The condition is characterized by a lack of development, primarily in the lower quadrants of the breast plus a rising of the inframammary fold, together with herniation and increased diameter of the areola. Many varied surgical techniques for correction of this malformation in its different degrees of severity have been documented in the available literature. This study examined the treatment of 42 breasts in 26 patients with a high percentage of full correction of the deformity. The advantages and achievements of the double unfolded strictly subareolar glandular flap include restructuring of the breast's lower pole in volume, length, and shape; reduction and even removal of the double-bubble effect as the flap covers the implant fitted; lowering of inframammary fold height; and correction of areola size and herniation. The procedure is performed through a hemi- or periareolar incision. The technique is versatile for managing the different variations of tuberous breasts, making it another interesting option for correction of the deformity. Level of Evidence IV This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

  10. Severe metabolic acidosis following assault chemical burn

    Directory of Open Access Journals (Sweden)

    Sophie De Roock

    2012-01-01

    Full Text Available Assault chemical burns are uncommon in northern Europe. Besides local toxicity, systemic manifestations are possible after strong acid exposure. A 40-year-old woman was admitted 1 h after a criminal assault with sulfuric acid. The total burned surface area was 35%, third degree. Injury was due to sulfuric acid (measured pH 0.9 obtained from a car battery. Immediate complications were obstructive dyspnea and metabolic acidosis. The admission arterial pH was 6.92, with total bicarbonate 8.6 mEq/l and base deficit 23.4 mEq/l. The correction of metabolic acidosis was achieved after several hours by the administration of bicarbonate and lactate buffers. The patient developed several burns-related complications (sepsis and acute renal failure. Cutaneous projections of strong acids may cause severe metabolic acidosis, particularly when copious irrigation and clothes removal cannot be immediately performed at the scene.

  11. Severe metabolic acidosis following assault chemical burn.

    Science.gov (United States)

    Roock, Sophie D; Deleuze, Jean-Paul; Rose, Thomas; Jennes, Serge; Hantson, Philippe

    2012-04-01

    Assault chemical burns are uncommon in northern Europe. Besides local toxicity, systemic manifestations are possible after strong acid exposure. A 40-year-old woman was admitted 1 h after a criminal assault with sulfuric acid. The total burned surface area was 35%, third degree. Injury was due to sulfuric acid (measured pH 0.9) obtained from a car battery. Immediate complications were obstructive dyspnea and metabolic acidosis. The admission arterial pH was 6.92, with total bicarbonate 8.6 mEq/l and base deficit 23.4 mEq/l. The correction of metabolic acidosis was achieved after several hours by the administration of bicarbonate and lactate buffers. The patient developed several burns-related complications (sepsis and acute renal failure). Cutaneous projections of strong acids may cause severe metabolic acidosis, particularly when copious irrigation and clothes removal cannot be immediately performed at the scene.

  12. Several real variables

    CERN Document Server

    Kantorovitz, Shmuel

    2016-01-01

    This undergraduate textbook is based on lectures given by the author on the differential and integral calculus of functions of several real variables. The book has a modern approach and includes topics such as: •The p-norms on vector space and their equivalence •The Weierstrass and Stone-Weierstrass approximation theorems •The differential as a linear functional; Jacobians, Hessians, and Taylor's theorem in several variables •The Implicit Function Theorem for a system of equations, proved via Banach’s Fixed Point Theorem •Applications to Ordinary Differential Equations •Line integrals and an introduction to surface integrals This book features numerous examples, detailed proofs, as well as exercises at the end of sections. Many of the exercises have detailed solutions, making the book suitable for self-study. Several Real Variables will be useful for undergraduate students in mathematics who have completed first courses in linear algebra and analysis of one real variable.

  13. Epidemiology of severe trauma.

    Science.gov (United States)

    Alberdi, F; García, I; Atutxa, L; Zabarte, M

    2014-12-01

    Major injury is the sixth leading cause of death worldwide. Among those under 35 years of age, it is the leading cause of death and disability. Traffic accidents alone are the main cause, fundamentally in low- and middle-income countries. Patients over 65 years of age are an increasingly affected group. For similar levels of injury, these patients have twice the mortality rate of young individuals, due to the existence of important comorbidities and associated treatments, and are more likely to die of medical complications late during hospital admission. No worldwide, standardized definitions exist for documenting, reporting and comparing data on severely injured trauma patients. The most common trauma scores are the Abbreviated Injury Scale (AIS), the Injury Severity Score (ISS) and the Trauma and Injury severity Score (TRISS). Documenting the burden of injury also requires evaluation of the impact of post-trauma impairments, disabilities and handicaps. Trauma epidemiology helps define health service and research priorities, contributes to identify disadvantaged groups, and also facilitates the elaboration of comparable measures for outcome predictions.

  14. Universal relations for range corrections to Efimov features

    Science.gov (United States)

    Ji, Chen; Braaten, Eric; Phillips, Daniel R.; Platter, Lucas

    2015-09-01

    In a three-body system of identical bosons interacting through a large S -wave scattering length a , there are several sets of features related to the Efimov effect that are characterized by discrete scale invariance. Effective field theory was recently used to derive universal relations between these Efimov features that include the first-order correction due to a nonzero effective range rs. We reveal a simple pattern in these range corrections that had not been previously identified. The pattern is explained by the renormalization group for the effective field theory, which implies that the Efimov three-body parameter runs logarithmically with the momentum scale at a rate proportional to rs/a . The running Efimov parameter also explains the empirical observation that range corrections can be largely taken into account by shifting the Efimov parameter by an adjustable parameter divided by a . The accuracy of universal relations that include first-order range corrections is verified by comparing them with various theoretical calculations using models with nonzero range.

  15. On alpha'-corrections to D-brane solutions

    CERN Document Server

    De Haro, S; Skenderis, K; Haro, Sebastian de; Sinkovics, Annamaria; Skenderis, Kostas

    2003-01-01

    We discuss the computation of the leading corrections to D-brane solutions due to higher derivative terms in the corresponding low energy effective action. We develop several alternative methods for analyzing the problem. In particular, we derive an effective one-dimensional action from which the field equations for spherically symmetric two-block brane solutions can be derived, show how to obtain first order equations, and discuss a few other approaches. We integrate the equations for extremal branes and obtain the corrections in terms of integrals of the evaluation of the higher derivative terms on the lowest order solution. To obtain completely explicit results one would need to know all leading higher derivative corrections which at present are not available. One of the known higher derivative terms is the R^4 term, and we obtain the corrections to the D3 brane solution due to this term alone. We note, however, that (unknown at present) higher terms depending on F_5 are expected to modify our result. We a...

  16. Physiopathology of severe asthma

    OpenAIRE

    Todo-Bom, Ana; Mota-Pinto, Anabela

    2006-01-01

    A história natural da asma e as condições determinantes de evolução para formas moderadas ou graves não estão completamente estabelecidas. Contudo, quer os fatores genéticos quer os fatores ambientais serão determinantes na fisiopatologia e no prognóstico da doença. Nesta revisão são apresentados os mecanismos envolvidos na fisiopatologia da asma grave The natural history of asthma and the determinant factors involved in its evolution from moderate to severe forms are not completely establ...

  17. 16 CFR 1209.37 - Corrective actions.

    Science.gov (United States)

    2010-01-01

    ... SAFETY STANDARD FOR CELLULOSE INSULATION Certification § 1209.37 Corrective actions. (a) Test failure... change in the product specification and a new cellulose insulation product (see § 1209.34(b)), the... insulation product itself. Corrective action may consist of equipment adjustment, equipment repair, equipment...

  18. Preparing and correcting extracted BRITE observations

    CERN Document Server

    Buysschaert, B; Neiner, C

    2016-01-01

    Extracted BRITE lightcurves must be carefully prepared and corrected for instrumental effects before a scientific analysis can be performed. Therefore, we have created a suite of Python routines to prepare and correct the lightcurves, which is publicly available. In this paper we describe the method and successive steps performed by these routines.

  19. 19 CFR 145.25 - Entry correct.

    Science.gov (United States)

    2010-04-01

    ... director believes the duty originally assessed was correct, he shall send the addressee a notice in writing... 19 Customs Duties 2 2010-04-01 2010-04-01 false Entry correct. 145.25 Section 145.25 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE...

  20. 7 CFR 868.73 - Corrected certificates.

    Science.gov (United States)

    2010-01-01

    ... authorized agent who affixed the name or signature, or both. Errors found during this process shall be... this section and the instructions, corrected certificates shall show— (i) The terms “Corrected Original... that has been superseded by another certificate or on the basis of a subsequent analysis for quality....

  1. Correction of errors in power measurements

    DEFF Research Database (Denmark)

    Pedersen, Knud Ole Helgesen

    1998-01-01

    Small errors in voltage and current measuring transformers cause inaccuracies in power measurements.In this report correction factors are derived to compensate for such errors.......Small errors in voltage and current measuring transformers cause inaccuracies in power measurements.In this report correction factors are derived to compensate for such errors....

  2. The Organization of Delayed Second Language Correction

    Science.gov (United States)

    Rolin-Ianziti, Jeanne

    2010-01-01

    The present study uses a conversation analytic framework to examine the organization of a type of classroom talk: the delayed correction sequence. Such talk occurs when teacher and students interactively correct errors after the students have completed a communicative activity. This study investigates naturally occurring instances of correction…

  3. Optimal correction of independent and correlated errors

    OpenAIRE

    Jacobsen, Sol H.; Mintert, Florian

    2013-01-01

    We identify optimal quantum error correction codes for situations that do not admit perfect correction. We provide analytic n-qubit results for standard cases with correlated errors on multiple qubits and demonstrate significant improvements to the fidelity bounds and optimal entanglement decay profiles.

  4. Radiative corrections to electron-proton scattering

    NARCIS (Netherlands)

    Maximon, LC; Tjon, JA

    2000-01-01

    The radiative corrections to elastic electron-proton scattering are analyzed in a hadronic model including the finite size of the nucleon. For initial electron energies above 8 GeV and large scattering angles, the proton vertex correction in this model increases by at least 2% of the overall factor

  5. 76 FR 11337 - Presidential Library Facilities; Correction

    Science.gov (United States)

    2011-03-02

    ..., June 17, 2008 (73 FR 34197) that are the subject of this correction, NARA adopted and incorporated by... RECORDS ADMINISTRATION 36 CFR Part 1281 RIN 3095-AA82 Presidential Library Facilities; Correction AGENCY... libraries and information required in NARA's reports to Congress before accepting title to or entering...

  6. 40 CFR 1065.672 - Drift correction.

    Science.gov (United States)

    2010-07-01

    ...-zero or post-span might have occurred after one or more subsequent test intervals. (5) If you do not...) Correction principles. The calculations in this section utilize a gas analyzer's responses to reference zero... correction is based on an analyzer's mean responses to reference zero and span gases, and it is based on...

  7. Thermoelastic Correction in the Torsion Pendulum Experiment

    Institute of Scientific and Technical Information of China (English)

    胡忠坤; 王雪黎; 罗俊

    2001-01-01

    The thermoelastic effect of the suspension fibre in the torsion pendulum experiment with magnetic damping was studied. The disagreement in the oscillation periods was reduced by one order of magnitude through monitoring the ambient temperature and thermoelastic correction. We also found that the period on uncertainty due to noise increases with the amplitude attenuation after thermoelastic correction.

  8. 9 CFR 417.3 - Corrective actions.

    Science.gov (United States)

    2010-01-01

    ... REGULATORY REQUIREMENTS UNDER THE FEDERAL MEAT INSPECTION ACT AND THE POULTRY PRODUCTS INSPECTION ACT HAZARD ANALYSIS AND CRITICAL CONTROL POINT (HACCP) SYSTEMS § 417.3 Corrective actions. (a) The written HACCP plan.... The HACCP plan shall describe the corrective action to be taken, and assign responsibility for...

  9. Correcting Poor Posture without Awareness or Willpower

    Science.gov (United States)

    Wernik, Uri

    2012-01-01

    In this article, a new technique for correcting poor posture is presented. Rather than intentionally increasing awareness or mobilizing willpower to correct posture, this approach offers a game using randomly drawn cards with easy daily assignments. A case using the technique is presented to emphasize the subjective experience of living with poor…

  10. A Hybrid Approach for Correcting Grammatical Errors

    Science.gov (United States)

    Lee, Kiyoung; Kwon, Oh-Woog; Kim, Young-Kil; Lee, Yunkeun

    2015-01-01

    This paper presents a hybrid approach for correcting grammatical errors in the sentences uttered by Korean learners of English. The error correction system plays an important role in GenieTutor, which is a dialogue-based English learning system designed to teach English to Korean students. During the talk with GenieTutor, grammatical error…

  11. ART and SIRT correction factors in geotomography

    Science.gov (United States)

    Balanis, C. A.; Hill, H. W.; Freeland, K. A.

    1983-04-01

    The ART and SIRT image reconstruction techniques are introduced and a correction factor which provides high resolution images is presented. The techniques were tested using synthetic measurements. In order to examine the manner in which each reconstruction progresses, the Euclidean distance for the reconstructions were plotted, versus iteration number. Results indicate that ART produces better reconstructed profiles than the SIRT (using identical correction factors).

  12. Quantum Error Correction Beyond Completely Positive Maps

    OpenAIRE

    Shabani, A.; Lidar, D. A.

    2006-01-01

    By introducing an operator sum representation for arbitrary linear maps, we develop a generalized theory of quantum error correction (QEC) that applies to any linear map, in particular maps that are not completely positive (CP). This theory of "linear quantum error correction" is applicable in cases where the standard and restrictive assumption of a factorized initial system-bath state does not apply.

  13. Optical advantages of astigmatic aberration corrected heliostats

    Science.gov (United States)

    van Rooyen, De Wet; Schöttl, Peter; Bern, Gregor; Heimsath, Anna; Nitz, Peter

    2016-05-01

    Astigmatic aberration corrected heliostats adapt their shape in dependence of the incidence angle of the sun on the heliostat. Simulations show that this optical correction leads to a higher concentration ratio at the target and thus in a decrease in required receiver aperture in particular for smaller heliostat fields.

  14. Energy Dependence of the Intermodule Widening Correction

    CERN Document Server

    Mcblane, Neil Fraser

    2017-01-01

    This project looked to investigate the energy dependence of the ATLAS Liquid Argon (LAr) Calorimeter Intermodule Widening correction factors. A clear energy dependence was observed, with possible parameterisations of the dependency were briefly explored. In addition, official correction factors were validated on a new software release.

  15. Characteristics of Correctional Instruction, 1789-1875.

    Science.gov (United States)

    Gehring, Thom

    1995-01-01

    In the 19th century, ministers would teach reading to prisoners on Sunday evenings, so-called sabbath schools. Expansion of these efforts into other subjects led to correctional education. Inadequate resources and facilities and resistance from administrators and prisoners parallel the struggles of today's correctional educators. (SK)

  16. The Organization of Correctional Education Services

    Science.gov (United States)

    Gehring, Thom

    2007-01-01

    There have been five major types of correctional education organizations over the centuries: Sabbath school, traditional or decentralized, bureau, correctional school district (CSD), and integral education. The middle three are modern organizational patterns that can be implemented throughout a system: Decentralized, bureau, and CSD. The…

  17. 75 FR 41556 - Proposed Collection Renewal; Correction

    Science.gov (United States)

    2010-07-16

    ... should be addressed to Marjorie Anctil, Director of World Wise Schools, Peace Corps, 1111 20th Street, NW... From the Federal Register Online via the Government Publishing Office PEACE CORPS Proposed Collection Renewal; Correction ACTION: 60-day notice and request for comments; correction. SUMMARY: The Peace...

  18. Electroweak Corrections at the LHC with MCFM

    Energy Technology Data Exchange (ETDEWEB)

    Campbell, John M. [Fermilab; Wackeroth, Doreen [SUNY, Buffalo; Zhou, Jia [SUNY, Buffalo

    2015-07-10

    Electroweak (EW) corrections at the LHC can be enhanced at high energies due to soft/collinear radiation of W and Z bosons, being dominated by Sudakov-like corrections in the form of $\\alpha_W^l\\log^n(Q^2/M_W^2)$ $(n \\le 2l, \\alpha_W = \\alpha/(4\\pi\\sin\\theta_W^2))$ when the energy scale $Q$ enters the TeV regime. Thus, the inclusion of EW corrections in LHC predictions is important for the search of possible signals of new physics in tails of kinematic distributions. EW corrections should also be taken into account in virtue of their comparable size ($\\mathcal{O}(\\alpha)$) to that of higher order QCD corrections ($\\mathcal{O}(\\alpha_s^2)$). We calculated the next-to-leading-order (NLO) weak corrections to the neutral-current (NC) Drell-Yan process, top-quark pair production and di-jet producion, and implemented them in the Monte-Carlo program MCFM. This enables a combined study with the corresponding NLO QCD corrections. We provide both the full NLO weak corrections and their weak Sudakov approximation valid at high energies. The latter is often used for a fast evaluation of weak effects, and having the exact result available as well allows to quantify the validity of the Sudakov approximation.

  19. Offset Correction Techniques for Voltage Sense Amplifiers

    NARCIS (Netherlands)

    Groeneveld, S.

    2006-01-01

    This report deals with offset correction techniques for voltage sense amplifiers and is divided into two different parts: 1) mismatch and 2) offset correction techniques. First a literature study is done on the subject mismatch with specially focus on the future. Mismatch of a transistor is determin

  20. 75 FR 41530 - Petitions for Modification; Correction

    Science.gov (United States)

    2010-07-16

    ... Safety and Health Administration Petitions for Modification; Correction AGENCY: Mine Safety and Health Administration, Labor. ACTION: Notice; correction. SUMMARY: The Mine Safety and Health Administration (MSHA... Affected: 30 CFR 75.507-1(a) (Electric equipment other than power-connection points; outby the last...

  1. Beyond Political Correctness: Toward the Inclusive University.

    Science.gov (United States)

    Richer, Stephen, Ed.; Weir, Lorna, Ed.

    This collection of 12 essays examines the history of the discourse over political correctness (PC) in Canadian academia, focusing on the neoconservative backlash to affirmative action, inclusive policies, and feminist and anti-racist teaching in the classroom. It includes: (1) "Introduction: Political Correctness and the Inclusive University"…

  2. 76 FR 32866 - Cable Landing Licenses; Correction

    Science.gov (United States)

    2011-06-07

    ... Systems Agency in the regulations that we published in the Federal Register of January 14, 2002, 67 FR... COMMISSION 47 CFR Part 1 Cable Landing Licenses; Correction AGENCY: Federal Communications Commission. ACTION... streamlined processing of cable landing license applications. Need for Correction As published, the...

  3. FISICO: Fast Image SegmentatIon COrrection.

    Directory of Open Access Journals (Sweden)

    Waldo Valenzuela

    Full Text Available In clinical diagnosis, medical image segmentation plays a key role in the analysis of pathological regions. Despite advances in automatic and semi-automatic segmentation techniques, time-effective correction tools are commonly needed to improve segmentation results. Therefore, these tools must provide faster corrections with a lower number of interactions, and a user-independent solution to reduce the time frame between image acquisition and diagnosis.We present a new interactive method for correcting image segmentations. Our method provides 3D shape corrections through 2D interactions. This approach enables an intuitive and natural corrections of 3D segmentation results. The developed method has been implemented into a software tool and has been evaluated for the task of lumbar muscle and knee joint segmentations from MR images.Experimental results show that full segmentation corrections could be performed within an average correction time of 5.5±3.3 minutes and an average of 56.5±33.1 user interactions, while maintaining the quality of the final segmentation result within an average Dice coefficient of 0.92±0.02 for both anatomies. In addition, for users with different levels of expertise, our method yields a correction time and number of interaction decrease from 38±19.2 minutes to 6.4±4.3 minutes, and 339±157.1 to 67.7±39.6 interactions, respectively.

  4. Minimal Exit Trajectories with Optimum Correctional Manoeuvres

    Directory of Open Access Journals (Sweden)

    T. N. Srivastava

    1980-10-01

    Full Text Available Minimal exit trajectories with optimum correctional manoeuvers to a rocket between two coplaner, noncoaxial elliptic orbits in an inverse square gravitational field have been investigated. Case of trajectories with no correctional manoeuvres has been analysed. In the end minimal exit trajectories through specified orbital terminals are discussed and problem of ref. (2 is derived as a particular case.

  5. Correctional Education Reform--School Libraries.

    Science.gov (United States)

    Puffer, Margaret; Burton, Linda

    2002-01-01

    School library services are essential to standards-based education reform. Correctional educators must be aware of information literacy standards as well as library standards for juvenile facilities and should incorporate library media specialists into correctional education programs. (Contains 32 references.) (SK)

  6. Relativistic corrections to molecular dynamic dipole polarizabilities

    DEFF Research Database (Denmark)

    Kirpekar, Sheela; Oddershede, Jens; Jensen, Hans Jørgen Aagaard

    1995-01-01

    Using response function methods we report calculations of the dynamic isotropic polarizability of SnH4 and PbH4 and of the relativistic corrections to it in the random phase approximation and at the correlated multiconfigurational linear response level of approximation. All relativistic corrections...

  7. Locative prepositional phrases in severe aphasia.

    Science.gov (United States)

    Weinrich, M; McCall, D; Shoosmith, L; Thomas, K; Katzenberger, K; Weber, C

    1993-07-01

    Six severely aphasic patients were trained on C-VIC, a computerized alternative communication system. Patients with both global and Broca's aphasia were able to produce and comprehend locative prepositions using C-VIC. The Broca's aphasic patients were able to produce and interpret symbol order correctly in C-VIC locative prepositional phrases, despite their difficulties in performing the same tasks using English. One patient's verbal production of locative prepositional phrases improved markedly after C-VIC training. These results suggest that the "mapping" impairment suffered by some Broca's aphasics may be ameliorated by use of alternative communication system, such as C-VIC.

  8. Abstract thinking following severe traumatic brain injury.

    Science.gov (United States)

    Scherzer, B P; Charbonneau, S; Solomon, C R; Lepore, F

    1993-01-01

    Abstract abilities were studied in a sample of 34 individuals with severe TBI and a control group. The results indicate that TBI interferes with performance on tests requiring individuals to process information into new categories. There appears to be a dissociation between verbal abstract abilities and visual-perceptual abstract abilities. There is evidence that Goldstein and Sheerer's [1] postulate of a general 'abstract attitude' was at least partially correct. This attitude does not appear to be related to a general verbal ideational process, as dysphasic subjects were only deficient on a purely verbal abstract task.

  9. Landscape scale thermography - from simple to sophisticated atmospheric data correction

    Science.gov (United States)

    Hammerle, Albin; Meier, Fred; Heinl, Michael; Egger, Angelika; Leitinger, Georg

    2014-05-01

    Surface temperature is a key variable in the study of energy and mass exchange at the surface-atmosphere interface. Surface temperatures are typically measured onsite by infrared radiometers, by infrared scanners mounted on aircrafts or on satellite platforms. While onsite measurements provide data at a high temporal resolution they cannot capture surface temperatures at the landscape scale. In contrast remotely sensed data provide surface temperature measurements on a wide area but relatively low temporal and/or spatial resolution - or in case of airborne measurements at very high costs. Recent technical advances and the improved accessibility of mobile thermal-infrared (TIR) cameras provide an instrument that can produce surface temperature measurements from close proximity to an object right up to distances of several kilometres. This measurement system provides spatial resolutions of some millimetres up to some meters at a temporal resolution down to some seconds covering areas of several square kilometers. Due to this available range of spatio-temporal resolutions this method perfectly closes that gap between point measurements onsite by infrared radiometers and remotely sensed data at relatively low costs. Therefore this method gains more and more popularity in ecological research. While remotely sensed surface temperature data are routinely corrected for atmospheric influences by this time such corrections are often neglected or waived for data retrieved with TIR cameras. This practice is defensible for short distance measurements. But for measurements on landscape-scales taken from a distance of kilometres, the bias caused by atmospheric distortion becomes highly relevant for the accuracy of the surface temperature data. In this study we compared different approaches for atmospheric correction of thermal infrared images. 2500 TIR surface temperature measurements that were retrieved during several campaigns in summer 2012 were compared with continuous on

  10. Key Techniques of Terminal Correction Mortar Projectiles

    Institute of Scientific and Technical Information of China (English)

    XU Jin-xiang

    2007-01-01

    The operational principle, the impulse force and terminal guidance laws of terminal correction mortar projectiles(TCMP) are researched in this paper, by using the TCMP simulation program, key techniques such as the miss distance influenced by the acting point of impulse force, the impulse force value, the correction threshold, and the number of impulse rockets are researched in this paper.And the dual pulse control scheme is also studied.Simulation results indicate that the best acting point is near the center of gravity, sufficient correction resources are needed, the miss distance is insentive to the correction threshold, increasing the number of impulse rockets properly is beneficial to increase the hit precision, the velocity pursuit guidance law has less miss distance, the change of the attack angle is milder and the transient time becomes less in the dual impulse control scheme.These conclusions are important for choosing parameters and impulse correction schemes designed for TCMP.

  11. Mechanism for Corrective Action on Budget Imbalances

    Directory of Open Access Journals (Sweden)

    Ion Lucian CATRINA

    2014-02-01

    Full Text Available The European Fiscal Compact sets the obligation for the signatory states to establish an automatic mechanism for taking corrective action on budget imbalances. Nevertheless, the European Treaty says nothing about the tools that should be used in order to reach the desired equilibrium of budgets, but only that it should aim at correcting deviations from the medium-term objective or the adjustment path, including their cumulated impact on government debt dynamics. This paper is aiming at showing that each member state has to build the correction mechanism according to the impact of the chosen tools on economic growth and on general government revenues. We will also emphasize that the correction mechanism should be built not only exacerbating the corrective action through spending/ tax based adjustments, but on a high quality package of economic policies as well.

  12. Quantum gravitational corrections for spinning particles

    CERN Document Server

    Fröb, Markus B

    2016-01-01

    We calculate the quantum corrections to the gauge-invariant gravitational potentials of spinning particles in flat space, induced by loops of both massive and massless matter fields of various types. While the corrections to the Newtonian potential induced by massless conformal matter for spinless particles are well-known, and the same corrections due to massless minimally coupled scalars [S. Park and R. P. Woodard, Class. Quant. Grav. 27 (2010) 245008], massless non-conformal scalars [A. Marunovic and T. Prokopec, Phys. Rev. D 87 (2013) 104027] and massive scalars, fermions and vector bosons [D. Burns and A. Pilaftsis, Phys. Rev. D 91 (2015) 064047] have been recently derived, spinning particles receive additional corrections which are the subject of the present work. We give both fully analytic results valid for all distances from the particle, and present numerical results as well as asymptotic expansions. At large distances from the particle, the corrections due to massive fields are exponentially suppres...

  13. Optical implementation of a unitarily correctable code

    Science.gov (United States)

    Schreiter, K. M.; Pasieka, A.; Kaltenbaek, R.; Resch, K. J.; Kribs, D. W.

    2009-08-01

    Noise poses a challenge for any real-world implementation in quantum information science. The theory of quantum error correction deals with this problem via methods to encode and recover quantum information in a way that is resilient against that noise. Unitarily correctable codes are an error correction technique wherein a single unitary recovery operation is applied without the need for an ancilla Hilbert space. Here, we present an optical implementation of a nontrivial unitarily correctable code for a noisy quantum channel with no decoherence-free subspaces or noiseless subsystems. We show that recovery of our initial states is achieved with high fidelity (≥0.97) , quantitatively proving the efficacy of this unitarily correctable code.

  14. Several crimes solved

    CERN Multimedia

    Relations with the Host States Service

    2007-01-01

    A member of a contractor's personnel suspected of having committed several thefts in and around Building 180 has recently been questioned by the French police. He was immediately tried by the court in Bourg-en-Bresse and sentenced to six months in prison, with a requirement to serve at least three months. His arrest was facilitated, among other things, by a video recording, fast and detailed statements to the CERN Fire Brigade and close collaboration between the members of the personnel concerned, the Reception and Access Control Service and the police. Several laptops and other items of electronic equipment were seized during a search of the culprit's home. A stolen digital camera has yet to be returned to its owner as he has not reported the theft to the CERN Fire Brigade and the police. The person concerned is therefore requested to go to the Gendarmerie in Saint-Genis-Pouilly with the necessary proof of ownership. In addition, the French authorities have informed CERN that the presumed authors of the a...

  15. A Form—Correcting System of Chinese Characters Using a Model of Correcting Procedures of Calligraphists

    Institute of Scientific and Technical Information of China (English)

    曾建超; HidehikoSanada; 等

    1995-01-01

    A support system for form-correction of Chinese Characters is developed based upon a generation model SAM,and its feasibility is evaluated.SAM is excellent as a model for generating Chinese characters,but it is difficult to determine appropriate parameters because the use of calligraphic knowledge is needed.by noticing that calligraphic knowledge of calligraphists is included in their corrective actions, we adopt a strategy to acquire calligraphic knowledge by monitoring,recording and analyzing corrective actions of calligraphists,and try to realize an environment under which calligraphists can easily make corrections to character forms and which can record corrective actions of calligraphists without interfering with them.In this paper,we first construct a model of correcting procedures of calligraphists,which is composed of typical correcting procedures that are acquired by extensively observing their corrective actions and interviewing them,and develop a form-correcting system for brush-written Chinese characters by using the model.Secondly,through actual correcting experiments,we demonstrate that parameters within SAM can be easily corrected at the level of character patterns by our system,and show that it is effective and easy for calligraphists to be used by evaluating effectiveness of the correcting model,sufficiency of its functions and execution speed.

  16. Corrective Action Plan for Corrective Action Unit 424: Area 3 Landfill Complex, Tonopah Test Range, Nevada

    Energy Technology Data Exchange (ETDEWEB)

    Bechtel Nevada

    1998-08-31

    This corrective action plan provides the closure implementation methods for the Area 3 Landfill Complex, Corrective Action Unit (CAU) 424, located at the Tonopah Test Range. The Area 3 Landfill Complex consists of 8 landfill sites, each designated as a separate corrective action site.

  17. Non-factorizable photonic corrections to resonant production and decay of many unstable particles

    Energy Technology Data Exchange (ETDEWEB)

    Dittmaier, Stefan; Schwan, Christopher [Albert-Ludwigs-Universitaet Freiburg, Physikalisches Institut, Freiburg (Germany)

    2016-03-15

    Electroweak radiative corrections to the production of high-multiplicity final states with several intermediate resonances in most cases can be sufficiently well described by the leading contribution of an expansion about the resonance poles. In this approach, also known as pole approximation, corrections are classified into separately gauge-invariant factorizable and non-factorizable corrections, where the former can be attributed to the production and decay of the unstable particles on their mass shell. The remaining non-factorizable corrections are induced by the exchange of soft photons between different production and decay subprocesses. We give explicit analytical results for the non-factorizable photonic virtual corrections to the production of an arbitrary number of unstable particles at the one-loop level and, thus, present an essential building block in the calculation of next-to-leading-order electroweak corrections in pole approximation. The remaining virtual factorizable corrections can be obtained with modern automated one-loop matrix-element generators, while the evaluation of the corresponding real photonic corrections can be evaluated with full matrix elements by multi-purpose Monte Carlo generators. Our results can be easily modified to non-factorizable QCD corrections, which are induced by soft-gluon exchange. (orig.)

  18. Inflationary power spectra with quantum holonomy corrections

    Energy Technology Data Exchange (ETDEWEB)

    Mielczarek, Jakub, E-mail: jakub.mielczarek@uj.edu.pl [Institute of Physics, Jagiellonian University, Reymonta 4, Cracow, 30-059 Poland (Poland)

    2014-03-01

    In this paper we study slow-roll inflation with holonomy corrections from loop quantum cosmology. It was previously shown that, in the Planck epoch, these corrections lead to such effects as singularity avoidance, metric signature change and a state of silence. Here, we consider holonomy corrections affecting the phase of cosmic inflation, which takes place away from the Planck epoch. Both tensor and scalar power spectra of primordial inflationary perturbations are computed up to the first order in slow-roll parameters and V/ρ{sub c}, where V is a potential of the scalar field and ρ{sub c} is a critical energy density (expected to be of the order of the Planck energy density). Possible normalizations of modes at short scales are discussed. In case the normalization is performed with use of the Wronskian condition applied to adiabatic vacuum, the tensor and scalar spectral indices are not quantum corrected in the leading order. However, by choosing an alternative method of normalization one can obtain quantum corrections in the leading order. Furthermore, we show that the holonomy-corrected equations of motion for tensor and scalar modes can be derived based on effective background metrics. This allows us to show that the classical Wronskian normalization condition is well defined for the cosmological perturbations with holonomy corrections.

  19. Quantum Steganography and Quantum Error-Correction

    CERN Document Server

    Shaw, Bilal A

    2010-01-01

    In the current thesis we first talk about the six-qubit quantum error-correcting code and show its connections to entanglement-assisted error-correcting coding theory and then to subsystem codes. This code bridges the gap between the five-qubit (perfect) and Steane codes. We discuss two methods to encode one qubit into six physical qubits. Each of the two examples corrects an arbitrary single-qubit error. The first example is a degenerate six-qubit quantum error-correcting code. We prove that a six-qubit code without entanglement assistance cannot simultaneously possess a Calderbank-Shor-Steane (CSS) stabilizer and correct an arbitrary single-qubit error. A corollary of this result is that the Steane seven-qubit code is the smallest single-error correcting CSS code. Our second example is the construction of a non-degenerate six-qubit CSS entanglement-assisted code. This code uses one bit of entanglement (an ebit) shared between the sender (Alice) and the receiver (Bob) and corrects an arbitrary single-qubit e...

  20. Correction for near vision in pseudophakic patients

    Directory of Open Access Journals (Sweden)

    Dujić Mirjana

    2004-01-01

    Full Text Available Objective of the study was to show the mean values of correction for near vision and to discuss the presbyopic correction in pseudophakic patients. Setting was the Eye department where authors work. Inclusion criteria for 55 patients were native or corrected distant vision of 0.8-1.0 on Snellen's chart; 0,6 on Jagger's chart for near vision; round pupil and good position of the implant. Biometry of the anterior chamber depth with Alcon biophysics during distant and near vision was performed in our study. „Hi square" test was carried out and it was concluded that patients younger than 59 years (41 eyes had median correction of +2.0 dsph, while patients older than 60 years (36 eyes had correction of+3.0 dsph, but it was not statistically significant. There was no statistically significant difference of the correction between pseudophakic (41 and phakic (19 eyes in patients younger than 59 years. The anterior movement of the IOL was 0.18 mm in the younger group and 0.15 mm in the older group. With good IOL movement and new materials which could have changeable refractive power, the problem of pseudophakic correction for near vision might be solved.

  1. Quantum gravitational corrections for spinning particles

    Science.gov (United States)

    Fröb, Markus B.

    2016-10-01

    We calculate the quantum corrections to the gauge-invariant gravitational potentials of spinning particles in flat space, induced by loops of both massive and massless matter fields of various types. While the corrections to the Newtonian potential induced by massless conformal matter for spinless particles are well known, and the same corrections due to massless minimally coupled scalars [23], massless non-conformal scalars [25] and massive scalars, fermions and vector bosons [98] have been recently derived, spinning particles receive additional corrections which are the subject of the present work. We give both fully analytic results valid for all distances from the particle, and present numerical results as well as asymptotic expansions. At large distances from the particle, the corrections due to massive fields are exponentially suppressed in comparison to the corrections from massless fields, as one would expect. However, a surprising result of our analysis is that close to the particle itself, on distances comparable to the Compton wavelength of the massive fields running in the loops, these corrections can be enhanced with respect to the massless case.

  2. English Learners Perception on Lecturers’ Corrective Feedback

    Directory of Open Access Journals (Sweden)

    Titien Fatmawaty Mohammad

    2016-04-01

    Full Text Available The importance of written corrective feedback (CF has been an issue of substantial debate in the literature and this controversial issue has led to a development in latest studies to draw on foreign language acquisition (FLA research as a way to further comprehend the complexities of this issue particularly how students and teachers perceive the effectiveness of written corrective feedback. This research has largely focused on students’ perception on Lecturers’ corrective feedback, perceives the usefulness of different types of corrective feedback and the reasons they have for their preferences. Qualitative data was collected from 40 EFL students in 6th semester, by means of written questionnaires, interview and observation. Four feedback strategies were employed in this research and ranked each statement by using five-point Likert scale. Findings showed that almost all students 81.43 % want correction or feedback from lecturers for the mistakes on their writing. For the type of written corrective feedback, students prefer lecturers mark their mistakes and give comment on their work with the percentage as follows: 93% students found that giving clues or comment about how to fix errors can improve their writing ability, 76.69% of the students found that error identification is the most useful type of feedback, and 57.50% of students have a positive opinion for the provision of correction which is accompanied by comment. Those percentages of students perspective is supported by students’ explanation in an open ended question of questionnaire. Pedagogical implications of the study are also discussed.

  3. Re-investigating the isotopic fractionation corrections in radiocarbon measurements

    Science.gov (United States)

    Fahrni, S.; Santos, G. M.; Xu, X.; Southon, J. R.

    2012-12-01

    By convention (Stuiver and Polach, 1977), 14C data has to be corrected for any isotopic fractionation occurring in nature, during the sample preparation or the measurement. The fractionation factor b = 2.0 used to correct the 14C/12C ratio for shifts in the 13C/12C ratio has been proposed in 1954 (Craig, 1954) and has been applied ever since. While theoretical considerations have suggested moderate deviations of b from 2.0, some measurements have suggested larger differences (e.g. Saliege and Fontes, 1984). With the increasing precision of radiocarbon measurements, potential deviations of b from 2.0 become more significant, since these could cause shifts of several decades in some radiocarbon dates (Southon, 2011). It is therefore of great interest for the radiocarbon community to re-evaluate the fractionation corrections. We present approaches for the experimental determination of b and discuss results and their effects on radiocarbon dating. Stuiver M., Polach H.A., 1977. Discussion: reporting of 14C data. Radiocarbon 19(3):355-63. Saliege J.F., Fontes J.C., 1984. Essai de détermination expérimentale du fractionnement des isotopes 13C et 14C du carbone au cours de processus naturels. International Journal of Applied Radiation and Isotopes 35(1):55-62. Craig H., 1954. Carbon 13 in plants and the relationships between carbon 13 and carbon 14 in nature. Journal of Geology 62(2):115-49. Southon J., 2011. Are the Fractionation Corrections Correct: Are the Isotopic Shifts for 14C/12C Ratios in Physical Processes and Chemical Reactions Really Twice Those for 13C/12C? Radiocarbon 53(4):691-704.

  4. Surgical results of strabismus correction in patients with myelomeningocele

    Directory of Open Access Journals (Sweden)

    Dayane Cristine Issaho

    2015-02-01

    Full Text Available Purpose: Myelomeningocele is one of the most common birth defects. It is associated with severe neurological deficiencies, and ocular changes, such as strabismus, are very common. The purpose of this study was to describe indications for strabismus surgery in patients with myelomeningocele and to evaluate the results achieved with surgical correction. Methods: We retrospectively reviewed records of all patients with myelomeningocele who underwent surgery for strabismus correction in a 5-year period in an institution for disabled children. Results: The main indications for strabismus surgery were esotropia and A-pattern anisotropia. Excellent surgical results were achieved in 60.9% of patients, satisfactory in 12.2%, and unsatisfactory in 26.9%. Conclusion: Patients with myelomeningocele and strabismus had a high incidence of esotropia and A-pattern anisotropia. Strabismus surgery in these patients had an elevated percentage of excellent and satisfactory results, not only for the ocular deviation, but also for improvement of head posture.

  5. Bias correction for magnetic resonance images via joint entropy regularization.

    Science.gov (United States)

    Wang, Shanshan; Xia, Yong; Dong, Pei; Luo, Jianhua; Huang, Qiu; Feng, Dagan; Li, Yuanxiang

    2014-01-01

    Due to the imperfections of the radio frequency (RF) coil or object-dependent electrodynamic interactions, magnetic resonance (MR) images often suffer from a smooth and biologically meaningless bias field, which causes severe troubles for subsequent processing and quantitative analysis. To effectively restore the original signal, this paper simultaneously exploits the spatial and gradient features of the corrupted MR images for bias correction via the joint entropy regularization. With both isotropic and anisotropic total variation (TV) considered, two nonparametric bias correction algorithms have been proposed, namely IsoTVBiasC and AniTVBiasC. These two methods have been applied to simulated images under various noise levels and bias field corruption and also tested on real MR data. The test results show that the proposed two methods can effectively remove the bias field and also present comparable performance compared to the state-of-the-art methods.

  6. Quantum Corrections to Solitons Composed of Interacting Fermions and Bosons.

    Science.gov (United States)

    Li, Ming

    To understand quark-confinment and hadron physics, many models have been proposed in attempts to describe hadrons as bound states of quarks through using solitons in an effective theory. Here we utilize a method of Green's function to study the quantum corrections to solitons at the one-loop level. We apply it first to investigate several two dimensional non-linear theories. We then generalize it to study in detail the one loop quantum corrections to nontopological solitons in the four dimensional Friedberg -Lee soliton model, which reduces to either the MIT or the SLAC bag model for appropriate limits of parameters in the theory. The derivative and inverse mass expansions to the non-local one loop energy are studied in detail. The behaviors of the model at finite temperature and baryon density are also studied.

  7. On the Interpretation of Gravitational Corrections to Gauge Couplings

    CERN Document Server

    Ellis, John

    2012-01-01

    Several recent papers discuss gravitational corrections to gauge couplings that depend quadratically on the energy. In the framework of the background-field approach, these correspond in general to adding to the effective action terms quadratic in the field strength but with higher-order space-time derivatives. We observe that such terms can be removed by appropriate local field redefinitions, and do not contribute to physical scattering-matrix elements. We illustrate this observation in the context of open string theory, where the effective action includes, among other terms, the well-known Born-Infeld form of non-linear electrodynamics. We conclude that the quadratically energy-dependent gravitational corrections are \\emph{not} physical in the sense of contributing to the running of a physically-measurable gauge coupling, or of unifying couplings as in string theory.

  8. Tree level unitarity and finiteness of electroweak oblique corrections

    CERN Document Server

    Nagai, Ryo

    2015-01-01

    We study perturbative unitarity and electroweak oblique corrections in the electroweak symmetry breaking models including an arbitrary number of neutral Higgs bosons. Requiring the perturbative unitarity of the high energy scattering amplitudes of weak gauge bosons and the neutral Higgs bosons at tree level, we obtain a set of conditions among the Higgs coupling strengths (unitarity sum rules). It is shown that the unitarity sum rules require the tree level rho parameter to be 1 if there are only neutral Higgs bosons. Moreover, we find that the one-loop finiteness of the electroweak oblique corrections is automatically guaranteed once the unitarity sum rules are imposed among the Higgs coupling strengths. Applying the unitarity sum rules, we obtain severe constraints on the mass of the second lightest neutral Higgs boson and the lightest neutral Higgs (a 125GeV Higgs) coupling strength from the results of the electroweak precision tests as well as the unitarity.

  9. Thermalization, Error Correction, and Memory Lifetime for Ising Anyon Systems

    Science.gov (United States)

    Brell, Courtney G.; Burton, Simon; Dauphinais, Guillaume; Flammia, Steven T.; Poulin, David

    2014-07-01

    We consider two-dimensional lattice models that support Ising anyonic excitations and are coupled to a thermal bath. We propose a phenomenological model for the resulting short-time dynamics that includes pair creation, hopping, braiding, and fusion of anyons. By explicitly constructing topological quantum error-correcting codes for this class of system, we use our thermalization model to estimate the lifetime of the quantum information stored in the encoded spaces. To decode and correct errors in these codes, we adapt several existing topological decoders to the non-Abelian setting. We perform large-scale numerical simulations of these two-dimensional Ising anyon systems and find that the thresholds of these models range from 13% to 25%. To our knowledge, these are the first numerical threshold estimates for quantum codes without explicit additive structure.

  10. Prosthetic Correction of Postenucleation Socket Syndrome: A Case Report.

    Science.gov (United States)

    Kamble, Vikas B

    2014-12-01

    Postenucleation socket syndrome is a frequent late complication of enucleation of eye globe. Several pathophysiological mechanisms have been proposed to account for the symptoms of postenucleation socket syndrome, which include lost orbital volume, superior sulcus deformity, upper eyelid ptosis, lower eyelid laxity, and backward tilt of the prosthesis. The goal of postenucleation socket syndrome treatment is to achieve the best possible functional and esthetic result. The treatment can be either conservative or surgical. For the patient interested in a non-surgical correction, the conservative treatment is simple and non invasive and can be done with prosthesis modification for good positioning, comfort, and mobility. This paper describes prosthetic correction of a patient with postenucleation socket syndrome by modified ocular prosthesis.

  11. Combined Error Correction Techniques for Quantum Computing Architectures

    CERN Document Server

    Byrd, M S; Byrd, Mark S.; Lidar, Daniel A.

    2003-01-01

    Proposals for quantum computing devices are many and varied. They each have unique noise processes that make none of them fully reliable at this time. There are several error correction/avoidance techniques which are valuable for reducing or eliminating errors, but not one, alone, will serve as a panacea. One must therefore take advantage of the strength of each of these techniques so that we may extend the coherence times of the quantum systems and create more reliable computing devices. To this end we give a general strategy for using dynamical decoupling operations on encoded subspaces. These encodings may be of any form; of particular importance are decoherence-free subspaces and quantum error correction codes. We then give means for empirically determining an appropriate set of dynamical decoupling operations for a given experiment. Using these techniques, we then propose a comprehensive encoding solution to many of the problems of quantum computing proposals which use exchange-type interactions. This us...

  12. Quadratic electroweak corrections for polarized Moller scattering

    Energy Technology Data Exchange (ETDEWEB)

    A. Aleksejevs, S. Barkanova, Y. Kolomensky, E. Kuraev, V. Zykunov

    2012-01-01

    The paper discusses the two-loop (NNLO) electroweak radiative corrections to the parity violating electron-electron scattering asymmetry induced by squaring one-loop diagrams. The calculations are relevant for the ultra-precise 11 GeV MOLLER experiment planned at Jefferson Laboratory and experiments at high-energy future electron colliders. The imaginary parts of the amplitudes are taken into consideration consistently in both the infrared-finite and divergent terms. The size of the obtained partial correction is significant, which indicates a need for a complete study of the two-loop electroweak radiative corrections in order to meet the precision goals of future experiments.

  13. General Logarithmic Corrections to Black Hole Entropy

    CERN Document Server

    Das, S; Bhaduri, R K; Das, Saurya; Majumdar, Parthasarathi; Bhaduri, Rajat K.

    2002-01-01

    We compute leading order corrections to the the entropy of any thermodynamic system due to small statistical fluctuations around equilibrium. When applied to black holes, these corrections are shown to be of the form $-k\\ln(Area)$. For BTZ black holes, $k=3/2$, as found earlier. We extend the result to anti-de Sitter Schwarzschild and Reissner-Nordstrom black holes in arbitrary dimensions. Finally we examine the role of conformal field theory in black hole entropy and its corrections.

  14. Transition-state theory and dynamical corrections

    DEFF Research Database (Denmark)

    Henriksen, Niels Engholm; Hansen, Flemming Yssing

    2002-01-01

    . The correction factor due to non-adiabatic dynamics is considered in relation to the non-activated dissociative sticking of N-2 on Fe(111). For this process, conventional transition-state theory gives a sticking probability which is about 10 times too large (at T = 300 K). We estimate that the sticking......We consider conventional transition-state theory, and show how quantum dynamical correction factors can be incorporated in a simple fashion, as a natural extension of the fundamental formulation. Corrections due to tunneling and non-adiabatic dynamics are discussed, with emphasis on the latter...

  15. Threshold corrections in heterotic flux compactifications

    CERN Document Server

    Angelantonj, Carlo; Sarkis, Matthieu

    2016-01-01

    We compute the one-loop threshold corrections to the gauge and gravitational couplings for a large class of N=2 non-K\\"ahler heterotic compactifications with three-form flux, consisting in principal two-torus bundles over K3 surfaces. We obtain the results as sums of BPS-states contributions, depending on the topological data of the bundle. We analyse also the worldsheet non-perturbative corrections coming from instantons wrapping the torus fiber, that are mapped under S-duality to D-instanton corrections in type I flux compactifications.

  16. Perimeter security for Minnesota correctional facilities

    Energy Technology Data Exchange (ETDEWEB)

    Crist, D. [Minnesota Department of Corrections, St. Paul, MN (United States); Spencer, D.D. [Sandia National Labs., Albuquerque, NM (United States)

    1996-12-31

    For the past few years, the Minnesota Department of Corrections, assisted by Sandia National Laboratories, has developed a set of standards for perimeter security at medium, close, and maximum custody correctional facilities in the state. During this process, the threat to perimeter security was examined and concepts about correctional perimeter security were developed. This presentation and paper will review the outcomes of this effort, some of the lessons learned, and the concepts developed during this process and in the course of working with architects, engineers and construction firms as the state upgraded perimeter security at some facilities and planned new construction at other facilities.

  17. Leading gravitational corrections and a unified universe

    DEFF Research Database (Denmark)

    Codello, Alessandro; Jain, Rajeev Kumar

    2016-01-01

    Leading order gravitational corrections to the Einstein-Hilbert action can lead to a consistent picture of the universe by unifying the epochs of inflation and dark energy in a single framework. While the leading local correction induces an inflationary phase in the early universe, the leading...... nonlocal term leads to an accelerated expansion of the universe at the present epoch. We argue that both the leading UV and IR terms can be obtained within the framework of a covariant effective field theory of gravity. The perturbative gravitational corrections therefore provide a fundamental basis...

  18. Hologram production and representation for corrected image

    Science.gov (United States)

    Jiao, Gui Chao; Zhang, Rui; Su, Xue Mei

    2015-12-01

    In this paper, a CCD sensor device is used to record the distorted homemade grid images which are taken by a wide angle camera. The distorted images are corrected by using methods of position calibration and correction of gray with vc++ 6.0 and opencv software. Holography graphes for the corrected pictures are produced. The clearly reproduced images are obtained where Fresnel algorithm is used in graph processing by reducing the object and reference light from Fresnel diffraction to delete zero-order part of the reproduced images. The investigation is useful in optical information processing and image encryption transmission.

  19. Electroweak corrections to hadronic event shapes

    CERN Document Server

    Denner, Ansgar; Gehrmann, Thomas; Kurz, Christian

    2010-01-01

    We report on a recent calculation of the electroweak O(\\alpha^3\\alpha_s) corrections to 3-jet production and related event-shape observables at e+e- colliders. The calculation properly accounts for the experimental photon isolation criteria and for the corrections to the total hadronic cross section. Corrections to the normalised event-shape distributions, which are exemplarily discussed here for the thrust distribution at LEP and linear-collider energies, turn out to be at the few-per-cent level and show remnants of the radiative return to the Z pole even after inclusion of appropriate cuts.

  20. Correction to Keller et al. (2015).

    Science.gov (United States)

    2015-08-01

    Reports an error in "Individual and Dyadic Planning Predicting Pelvic Floor Exercise Among Prostate Cancer Survivors" by Jan Keller, Silke Burkert, Amelie U. Wiedemann, Aleksandra Luszczynska, Mark Schrader and Nina Knoll (Rehabilitation Psychology, Advanced Online Publication, Jul 6, 2015, np). Aleksandra Luszczynska's institutional affiliation was incorrectly set as Warsaw School of Social Sciences and Humanities. It should have been University of Social Sciences and Humanities. All versions of this article have been corrected. (The following abstract of the original article appeared in record 2015-30045-001.) Radical prostatectomy, a standard treatment for localized prostate cancer, is often followed by a recommendation to initiate and maintain pelvic floor exercise (PFE), to control postsurgery urinary incontinence. Previous studies showed that planning facilitated the uptake and maintenance of a new behavior. Whereas individual planning addresses the setting of plans by 1 person, dyadic planning refers to creating plans together with a partner on when, where, and how the individual target person will perform a behavior. Individual and dyadic planning of PFE, their development over time, and their associations with PFE were investigated. In a correlational study, 175 prostate-cancer patients provided data at 1, 3, 5, and 7 months following the onset of incontinence. Individual planning of PFE by patients and dyadic planning of PFE between patients and their partners, PFE, and incontinence were assessed by patients' self-reports. Two-level models with repeated assessments nested in individuals revealed stable levels of individual planning of PFE over time in patients with higher incontinence severity, whereas patients with receding incontinence showed decreases. Independent of incontinence severity, a curvilinear increase followed by a decrease of dyadic planning of PFE across time emerged. Sequential associations of both planning strategies with PFE were found

  1. CALCULATION OF THE RELATIVISTIC CORRECTION ENERGIES OF Ne-LIKE IONS WITH ORBITAL POLARIZATION CORRECTION

    Institute of Scientific and Technical Information of China (English)

    LI XIANG-DONG; TAN MING-LIANG; YI YOU-GEN; SHENG YONG; JIANG GANG; ZHANG ZHI-HONG; ZHU ZHENG-HE; ZHAO YONG-KUAN

    2000-01-01

    This paper reports the theoretical calculation of Breit, self-energy, and vacuum polarization corrections in the Ne like system using multi-configuration Dirac-Fock method with the orbital polarization. The relations of these corrections with the atomic number and the orbital symmetries are shown and the calculated correction energies are compared with other calculated results. Our Breit correction energies are all smaller by leV as maximum than the other theoretical Breit correction energies and the differences reveal systematical relation with atomic number. It is found that the configuration interactions have great effect on Breit corrections while the orbital polarization has much smaller effect on Breit corrections. The self-energy and vacuum polarization obtained by our calculation are much different from that in previous literatures for some transitions.

  2. Improving quantitative dosimetry in (177)Lu-DOTATATE SPECT by energy window-based scatter corrections

    DEFF Research Database (Denmark)

    de Nijs, Robin; Lagerburg, Vera; Klausen, Thomas L

    2014-01-01

    and the activity, which depends on the collimator type, the utilized energy windows and the applied scatter correction techniques. In this study, energy window subtraction-based scatter correction methods are compared experimentally and quantitatively. MATERIALS AND METHODS: (177)Lu SPECT images of a phantom...... with known activity concentration ratio between the uniform background and filled hollow spheres were acquired for three different collimators: low-energy high resolution (LEHR), low-energy general purpose (LEGP) and medium-energy general purpose (MEGP). Counts were collected in several energy windows......, and scatter correction was performed by applying different methods such as effective scatter source estimation (ESSE), triple-energy and dual-energy window, double-photopeak window and downscatter correction. The intensity ratio between the spheres and the background was measured and corrected for the partial...

  3. A Comparison of Two Approaches to Correction of Restriction of Range in Correlation Analysis

    Directory of Open Access Journals (Sweden)

    Marie Wiberg

    2009-03-01

    Full Text Available A common problem in predictive validity studies in the educational and psychological fields, e.g. in educational and employment selection, is restriction in range of the predictor variables. There are several methods for correcting correlations for restriction of range. The aim of this paper was to examine the usefulness of two approaches to correcting for range restriction; Thorndike's case 2 correction and ML estimates obtained from the EM algorithm, by comparing the corrected correlations with the correlation from an unrestricted sample. The unrestricted sample consisted of examinees who took the practical Swedish driving-license test regardless of their result on the theory test. Examinees that passed the theory test and took the practical test were regarded as a restricted sample. The result provided empirical support for the appropriateness of Thorndike's case 2 correction method. Although using the EM algorithm yielded a good estimate of the correlation in the unrestricted sample, further studies are needed on this topic

  4. On the importance of the 1-loop finite corrections to seesaw neutrino masses

    CERN Document Server

    Sierra, D Aristizabal

    2011-01-01

    In the standard seesaw mechanism, finite corrections to the neutrino mass matrix arise from 1-loop self-energy diagrams mediated by a heavy neutrino. We study in detail these corrections and demonstrate that they can be very significant, exceeding in several cases the tree-level result. We consider the normal and inverted hierarchy spectra for light neutrinos and compute the finite corrections to the different elements of the neutrino mass matrix. Special attention is paid to their dependence with the parameters of the seesaw model. Among the cases in which the corrections can be large, we identify the fine-tuned models considered previously in the literature, where a strong cancellation between the different parameters is required to achieve compatibility with the experimental data. As a particular example, we also analyze how these corrections modify the tribimaximal mixing pattern and find that the deviations may be sizable, in particular for $\\theta_{13}$. Finally, we emphasize that due to their large siz...

  5. BayesHammer: Bayesian clustering for error correction in single-cell sequencing.

    Science.gov (United States)

    Nikolenko, Sergey I; Korobeynikov, Anton I; Alekseyev, Max A

    2013-01-01

    Error correction of sequenced reads remains a difficult task, especially in single-cell sequencing projects with extremely non-uniform coverage. While existing error correction tools designed for standard (multi-cell) sequencing data usually come up short in single-cell sequencing projects, algorithms actually used for single-cell error correction have been so far very simplistic.We introduce several novel algorithms based on Hamming graphs and Bayesian subclustering in our new error correction tool BAYESHAMMER. While BAYESHAMMER was designed for single-cell sequencing, we demonstrate that it also improves on existing error correction tools for multi-cell sequencing data while working much faster on real-life datasets. We benchmark BAYESHAMMER on both k-mer counts and actual assembly results with the SPADES genome assembler.

  6. The correct renal function evaluation in patients with thyroid dysfunction.

    Science.gov (United States)

    Simeoni, Mariadelina; Cerantonio, Annamaria; Pastore, Ida; Liguori, Rossella; Greco, Marta; Foti, Daniela; Gulletta, Elio; Brunetti, Antonio; Fuiano, Giorgio

    2016-05-01

    Thyroid dysfunction induces several renal derangements involving all nephron portions. Furthermore, dysthyroidism is a recognized risk factor associated with the development of chronic kidney disease. Current data, in fact, demonstrate that either subclinical or overt thyroid disease is associated with significant changes in creatinine, estimated glomerular filtration rate, measured glomerular filtration rate and Cystatin C. Herein, we systematically reviewed several relevant studies aiming at the identification of the most sensitive and specific parameter for the correct renal function evaluation in patients with thyroid dysfunction, that are usually treated as outpatients. Our systematic review indicates that estimated glomerular filtration rate, preferably with CKD-EPI equation, appears to be the most reliable and wieldy renal function parameter. Instead, Cystatin C should be better used in the grading of thyroid dysfunction severity.

  7. The correct use of the ART approach.

    NARCIS (Netherlands)

    Frencken, J.E.F.M.; Leal, S.C.

    2010-01-01

    Confusion exists amongst dentists and scientists about the correct use of the caries management approach termed atraumatic restorative treatment (ART). Inconsistent use of the original definition of ART and suggested modifications (mART) have led to misunderstanding, misconception and

  8. Radiation Emitting Product Corrective Actions and Recalls

    Data.gov (United States)

    U.S. Department of Health & Human Services — This database provides descriptions of radiation-emitting products that have been recalled under an approved corrective action plan to remove defective and...

  9. Assessing the Security Vulnerabilities of Correctional Facilities

    Energy Technology Data Exchange (ETDEWEB)

    Morrison, G.S.; Spencer, D.S.

    1998-10-27

    The National Institute of Justice has tasked their Satellite Facility at Sandia National Laboratories and their Southeast Regional Technology Center in Charleston, South Carolina to devise new procedures and tools for helping correctional facilities to assess their security vulnerabilities. Thus, a team is visiting selected correctional facilities and performing vulnerability assessments. A vulnerability assessment helps to identi~ the easiest paths for inmate escape, for introduction of contraband such as drugs or weapons, for unexpected intrusion fi-om outside of the facility, and for the perpetration of violent acts on other inmates and correctional employees, In addition, the vulnerability assessment helps to quantify the security risks for the facility. From these initial assessments will come better procedures for performing vulnerability assessments in general at other correctional facilities, as well as the development of tools to assist with the performance of such vulnerability assessments.

  10. A refined tip correction based on decambering

    DEFF Research Database (Denmark)

    Sørensen, Jens Nørkær; Dag, Kaya Onur; Ramos García, Néstor

    2016-01-01

    A new tip correction for use in performance codes based on the blade element momentum (BEM) or the lifting-line techniqueis presented. The correction modifies the circulation by taking into account the additional influence of the inductionof the vortices in the wake, using the so-called decambering...... effect and thin-airfoil theory. A limitation of the standard Prandtl tip correction is that it represents the surface loading by a line distribution that does not take into account the actual shape of the rotor blade. Thus, the chord distribution does not appear as a parameter in the model......, and the loading in the proximity of the tip is generally found to be overestimated. The new tip correction is implemented as an additional correctionin order to represent the surface loading by a line distribution. Comparing computations using the new model with standard BEM results and computations using a 3D...

  11. Catadioptric aberration correction in cathode lens microscopy

    Energy Technology Data Exchange (ETDEWEB)

    Tromp, R.M. [IBM T.J. Watson Research Center, PO Box 218, Yorktown Heights, NY 10598 (United States); Kamerlingh Onnes Laboratory, Leiden Institute of Physics, Niels Bohrweg 2, 2333 CA Leiden (Netherlands)

    2015-04-15

    In this paper I briefly review the use of electrostatic electron mirrors to correct the aberrations of the cathode lens objective lens in low energy electron microscope (LEEM) and photo electron emission microscope (PEEM) instruments. These catadioptric systems, combining electrostatic lens elements with a reflecting mirror, offer a compact solution, allowing simultaneous and independent correction of both spherical and chromatic aberrations. A comparison with catadioptric systems in light optics informs our understanding of the working principles behind aberration correction with electron mirrors, and may point the way to further improvements in the latter. With additional developments in detector technology, 1 nm spatial resolution in LEEM appears to be within reach. - Highlights: • The use of electron mirrors for aberration correction in LEEM/PEEM is reviewed. • A comparison is made with similar systems in light optics. • Conditions for 1 nm spatial resolution are discussed.

  12. T-branes and $\\alpha'$-corrections

    CERN Document Server

    Marchesano, Fernando

    2016-01-01

    We study $\\alpha'$-corrections in multiple D7-brane configurations with non-commuting profiles for their transverse position fields. We focus on T-brane systems, crucial in F-theory GUT model building. There $\\alpha'$-corrections modify the D-term piece of the BPS equations which, already at leading order, require a non-primitive Abelian worldvolume flux background. We find that $\\alpha'$-corrections may either i) leave this flux background invariant, ii) modify the Abelian non-primitive flux profile, or iii) deform it to a non-Abelian profile. The last case typically occurs when primitive fluxes, a necessary ingredient to build 4d chiral models, are added to the system. We illustrate these three cases by solving the $\\alpha'$-corrected D-term equations in explicit examples, and describe their appearance in more general T-brane backgrounds. Finally, we discuss implications of our findings for F-theory GUT local models.

  13. The Challenge of Individualized Instruction in Corrections.

    Science.gov (United States)

    Clements, Carl B.; McKee, John M.

    2000-01-01

    Discusses 14 challenges to the use of individualized instruction in corrections. Emphasizes a systems approach, motivational tools, programmed instructional materials, and approaches such as Direct Instruction and Precision Teaching. (SK)

  14. HSIP Correctional Institutions in New Mexico

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — Jails and Prisons (Correctional Institutions). The Jails and Prisons sub-layer is part of the Emergency Law Enforcement Sector and the Critical Infrastructure...

  15. Experimental demonstration of topological error correction.

    Science.gov (United States)

    Yao, Xing-Can; Wang, Tian-Xiong; Chen, Hao-Ze; Gao, Wei-Bo; Fowler, Austin G; Raussendorf, Robert; Chen, Zeng-Bing; Liu, Nai-Le; Lu, Chao-Yang; Deng, You-Jin; Chen, Yu-Ao; Pan, Jian-Wei

    2012-02-22

    Scalable quantum computing can be achieved only if quantum bits are manipulated in a fault-tolerant fashion. Topological error correction--a method that combines topological quantum computation with quantum error correction--has the highest known tolerable error rate for a local architecture. The technique makes use of cluster states with topological properties and requires only nearest-neighbour interactions. Here we report the experimental demonstration of topological error correction with an eight-photon cluster state. We show that a correlation can be protected against a single error on any quantum bit. Also, when all quantum bits are simultaneously subjected to errors with equal probability, the effective error rate can be significantly reduced. Our work demonstrates the viability of topological error correction for fault-tolerant quantum information processing.

  16. Increasing sensing resolution with error correction.

    Science.gov (United States)

    Arrad, G; Vinkler, Y; Aharonov, D; Retzker, A

    2014-04-18

    The signal to noise ratio of quantum sensing protocols scales with the square root of the coherence time. Thus, increasing this time is a key goal in the field. By utilizing quantum error correction, we present a novel way of prolonging such coherence times beyond the fundamental limits of current techniques. We develop an implementable sensing protocol that incorporates error correction, and discuss the characteristics of these protocols in different noise and measurement scenarios. We examine the use of entangled versue untangled states, and error correction's reach of the Heisenberg limit. The effects of error correction on coherence times are calculated and we show that measurement precision can be enhanced for both one-directional and general noise.

  17. Refractive surgery for the correction of myopia.

    Science.gov (United States)

    Swinger, C A

    1981-01-01

    Interest in the surgical correction of myopia is increasing. At the present time, two procedures are clinically employed: radial keratotomy and myopic keratomileusis. The two techniques are described, and a detailed clinical comparison is presented.

  18. Radiative corrections to the polarizability of helium.

    Science.gov (United States)

    Łach, Grzegorz; Jeziorski, Bogumił; Szalewicz, Krzysztof

    2004-06-11

    The complete alpha(3) QED correction to the helium atom polarizability is computed assuming an infinite nuclear mass and found to be equal to 0.000030666(3) a.u., with the contribution from the electric-field dependence of the Bethe logarithm amounting to 0.000000193(2) a.u. After including the alpha(2) and alpha(3) corrections for the nuclear recoil and the leading part of the alpha(4) QED correction, we find that the molar polarizability of 4He is 0.51725419(9)(4) cm(3)/mol. The first of the two error bounds is dominated by the uncertainty of alpha(4) and higher-order QED corrections and the second reflects the uncertainty of the Avogadro constant.

  19. 78 FR 32165 - Commercial Radio Operators; Correction

    Science.gov (United States)

    2013-05-29

    ... COMMISSION 47 CFR Part 0 Commercial Radio Operators; Correction AGENCY: Federal Communication Commission...) Administers the Commission's commercial radio operator program (part 13 of this chapter); the Commission's... rules concerning radio operator licenses for maritime and aviation in order to reduce...

  20. Vermont "Hydrologically Corrected" Digital Elevation Model (VTHYDRODEM)

    Data.gov (United States)

    Vermont Center for Geographic Information — VTHYDRODEM was created to produce a "hydrologically correct" DEM, compliant with the Vermont Hydrography Dataset (VHD) in support of the "flow regime" project whose...

  1. Geometric Correction for Braille Document Images

    Directory of Open Access Journals (Sweden)

    Padmavathi.S

    2016-04-01

    Full Text Available Braille system has been used by the visually impair ed people for reading.The shortage of Braille books has caused a need for conversion of Braille t o text. This paper addresses the geometric correction of a Braille document images. Due to the standard measurement of the Braille cells, identification of Braille characters could be achie ved by simple cell overlapping procedure. The standard measurement varies in a scaled document an d fitting of the cells become difficult if the document is tilted. This paper proposes a line fitt ing algorithm for identifying the tilt (skew angle. The horizontal and vertical scale factor is identified based on the ratio of distance between characters to the distance between dots. Th ese are used in geometric transformation matrix for correction. Rotation correction is done prior to scale correction. This process aids in increased accuracy. The results for various Braille documents are tabulated.

  2. Relativistic Scott correction for atoms and molecules

    DEFF Research Database (Denmark)

    Solovej, Jan Philip; Sørensen, Thomas Østergaard; Spitzer, Wolfgang Ludwig

    2010-01-01

    We prove the first correction to the leading Thomas-Fermi energy for the ground state energy of atoms and molecules in a model where the kinetic energy of the electrons is treated relativistically. The leading Thomas-Fermi energy, established in [25], as well as the correction given here, are of ......We prove the first correction to the leading Thomas-Fermi energy for the ground state energy of atoms and molecules in a model where the kinetic energy of the electrons is treated relativistically. The leading Thomas-Fermi energy, established in [25], as well as the correction given here......, are of semiclassical nature. Our result on atoms and molecules is proved from a general semiclassical estimate for relativistic operators with potentials with Coulomb-like singularities. This semiclassical estimate is obtained using the coherent state calculus introduced in [36]. The paper contains a unified treatment...

  3. Performance Evaluation of Blind Tropospheric Delay correction ...

    African Journals Online (AJOL)

    Performance Evaluation of Blind Tropospheric Delay correction Models over Africa. ... consisting of surface meteorological models and global empirical models. ... GPT2w and UNB3M models with accurate International GNSS Service (IGS)- ...

  4. Parton distribution functions with QED corrections

    CERN Document Server

    Carrazza, Stefano

    2015-01-01

    We present the first unbiased determination of parton distribution functions (PDFs) with electroweak corrections. The aim of this thesis is to provide an exhaustive description of the theoretical framework and the technical implementation which leads to the determination of a set of PDFs which includes the photon PDF and quantum electrodynamics (QED) contributions to parton evolution. First, we introduce and motivate the need of including electroweak corrections to PDFs, providing phenomenological examples and presenting an overview of the current state of the art in PDF fits. The theoretical implications of such corrections are then described through the implementation of the combined QCD+QED evolution in APFEL, a public code for the solution of the PDF evolution developed particularly for this thesis. We proceed by presenting the new structure of the Neural-Network PDF (NNPDF) methodology used for the extraction of this set of PDFs with QED corrections. We then provide a first determination of the full set ...

  5. Pole Inflation - Shift Symmetry and Universal Corrections

    CERN Document Server

    Broy, Benedict J; Roest, Diederik; Westphal, Alexander

    2015-01-01

    An appealing explanation for the Planck data is provided by inflationary models with a non-canonical kinetic term: a Laurent expansion of the kinetic function translates into a potential with a nearly shift-symmetric plateau in canonical fields. The shift symmetry can be broken at large field values by including higher-order poles. We show that the resulting corrections to the inflationary dynamics and predictions are universal at lowest order, and can induce power loss at large angular scales. At lowest order there are no corrections from a pole of one order higher; this is referred to as extended no-scale in string theory and we explain why this is a general phenomenon. Finally, we outline which other corrections may arise as string loop corrections.

  6. Electromagnetic corrections in eta --> 3 pi decays

    CERN Document Server

    Ditsche, Christoph; Meißner, Ulf-G

    2008-01-01

    We re-evaluate the electromagnetic corrections to eta --> 3 pi decays at next-to-leading order in the chiral expansion, arguing that effects of order e^2(m_u-m_d) disregarded so far are not negligible compared to other contributions of order e^2 times a light quark mass. Despite the appearance of the Coulomb pole in eta --> pi+ pi- pi0 and cusps in eta --> 3 pi0, the overall corrections remain small.

  7. Survey of Radar Refraction Error Corrections

    Science.gov (United States)

    2016-11-01

    Science Laboratory. “Data Systems Manual, Meteorology and Timing.” Prepared for White Sands Missile Range under contract DAAD07-76-0007, September, 1979...reflect the different meteorological layers within the troposphere. Atmospheric Modeling Parameters 5.1 Earth Model Refraction correction models use...Reference Atmosphere. Washington: U.S. Dept. of Commerce, National Bureau of Standards, 1959. Survey of Radar Refraction Error Corrections, RCC 266

  8. Nonfreeze epikeratophakia for the correction of myopia.

    Science.gov (United States)

    Krumeich, J H; Swinger, C A

    1987-03-15

    We developed a procedure for preparing epikeratophakia tissue lenses for the correction of myopia from unfrozen tissue using a newly developed artificial anterior chamber and the BKS-1000 (Barraquer-Krumeich-Swinger) refractive set. The results of 23 clinical cases involving tissue that was not frozen or lyophilized demonstrate a correlation coefficient of 0.90 in terms of accuracy of correction and good visual acuity results.

  9. Robust Quantum Error Correction via Convex Optimization

    CERN Document Server

    Kosut, R L; Lidar, D A

    2007-01-01

    Quantum error correction procedures have traditionally been developed for specific error models, and are not robust against uncertainty in the errors. Using a semidefinite program optimization approach we find high fidelity quantum error correction procedures which present robust encoding and recovery effective against significant uncertainty in the error system. We present numerical examples for 3, 5, and 7-qubit codes. Our approach requires as input a description of the error channel, which can be provided via quantum process tomography.

  10. Habit Breaking Appliance for Multiple Corrections

    OpenAIRE

    Reji Abraham; Geetha Kamath; Jasmeet Singh Sodhi; Sonia Sodhi; Chandki Rita; Sai Kalyan, S.

    2013-01-01

    Tongue thrusting and thumb sucking are the most commonly seen oral habits which act as the major etiological factors in the development of dental malocclusion. This case report describes a fixed habit correcting appliance, Hybrid Habit Correcting Appliance (HHCA), designed to eliminate these habits. This hybrid appliance is effective in less compliant patients and if desired can be used along with the fixed orthodontic appliance. Its components can act as mechanical restrainers and muscle ret...

  11. On quantum corrections to dislocations mass

    CERN Document Server

    Kwiatkowski, Grzegorz

    2011-01-01

    Quasi-classical quantization of crystal dislocations field is considered in terms of functional integral. The generalized zeta-function is used to evaluate the functional integral and quantum corrections to mass in quasi-classical approximation. The quantum corrections to few classical solutions of one-dimensional Sin-Gordon model are evaluated with account of rest $n-1$ dimensions. The results are applied to appropriate crystal dislocation models.

  12. LINEARIZATION AND CORRECTION METHOD FOR NONLINEAR PROBLEMS

    Institute of Scientific and Technical Information of China (English)

    何吉欢

    2002-01-01

    A new perturbation-like technique called linearization and correction method is proposed. Contrary to the traditional perturbation techniques, the present theory does not assume that the solution is expressed in the form of a power series of small parameter. To obtain an asymptotic solution of nonlinear system, the technique first searched for a solution for the linearized system, then a correction was added to the linearized solution. So the obtained results are uniformly valid for both weakly and strongly nonlinear equations.

  13. Boundary Correct Real-Time Soft Shadows

    DEFF Research Database (Denmark)

    Jacobsen, Bjarke; Christensen, Niels Jørgen; Larsen, Bent Dalgaard

    2004-01-01

    This paper describes a method to determine correct shadow boundaries from an area light source using umbra and penumbra volumes. The light source is approximated by a circular disk as this gives a fast way to extrude the volumes. The method also gives a crude estimate of the visibility of the are...... for implementation on most programmable hardware. Though some crude approximations are used in the visibility function, the method can be used to produce soft shadows with correct boundaries in real time....

  14. Can Dopplergrams be corrected for straylight?

    Science.gov (United States)

    Moretti, P. F.

    2000-10-01

    Straylight effects in solar intensity images have been framed in a well-established mathematical formulation (Chae et al., 1998a, b). Many procedures can be applied to recover the point spread function (PSF) and correct the atmospheric and instrumental distortions. Concerning velocity data, some procedures to make corrections for straylight have been addressed. Many experiments infer the velocity as the mean displacement of a spectral line and build a Dopplergram as a nonlinear combination of the intensity images sampled at different wavelengths. Unfortunately, often only the final products are available and it is not possible to apply an appropriate correction to the individual intensity images. A standard procedure to correct for the straylight has been applied to a time-series of velocity data and the results have been controlled in the single Dopplergram (that seems to be good) and in a power spectrum at the atmospheric frequencies (where any correction should reduce the power). These frequencies are characteristic of the observing site and typically in the range of the g modes: this means that no long run from a network would decrease their contribution to the noise. The results show that the correction procedures, based on the intensity and velocity gradients, are not reliable if controlled in the power spectrum. This conclusion has led to a change of the acquisition procedure at the Kanzelhöhe Solar Observatory, where now the individual intensity images that build the Dopplergram are stored.

  15. Correction of chordee. The Nesbit procedure.

    Science.gov (United States)

    Montague, D K

    1986-02-01

    In select patients the Nesbit operation is a useful procedure for the correction of congenital or acquired chordee. This operation results in a deliberate shortening of the convex surface of the corpora cavernosa to counterbalance congenital or acquired shortening on the opposite side. Precise placement of the corrective tuck allows complete correction of the chordee with minimal disturbance of normal tissue. An artificial erection should be created to permit precise identification of the point of maximal curvature on the longer (convex) side of the penis. The transverse elliptical segment to be removed should be placed precisely at this point and should be of sufficient width to result in complete correction of the chordee. Care should be taken to remove only a segment of the tunica albuginea without damaging the underlying erectile tissue. In cases of ventral chordee, the corrective procedure will require elevation of the neurovascular bundle. In cases of dorsal chordee, the procedure will require elevation of the urethra and corpus spongiosum. A repeat artificial erection insures that an adequate correction has been obtained.

  16. Optimal feedback correction in string quartet synchronization.

    Science.gov (United States)

    Wing, Alan M; Endo, Satoshi; Bradbury, Adrian; Vorberg, Dirk

    2014-04-06

    Control of relative timing is critical in ensemble music performance. We hypothesize that players respond to and correct asynchronies in tone onsets that arise from fluctuations in their individual tempos. We propose a first-order linear phase correction model and demonstrate that optimal performance that minimizes asynchrony variance predicts a specific value for the correction gain. In two separate case studies, two internationally recognized string quartets repeatedly performed a short excerpt from the fourth movement of Haydn's quartet Op. 74 no. 1, with intentional, but unrehearsed, expressive variations in timing. Time series analysis of successive tone onset asynchronies was used to estimate correction gains for all pairs of players. On average, both quartets exhibited near-optimal gain. However, individual gains revealed contrasting patterns of adjustment between some pairs of players. In one quartet, the first violinist exhibited less adjustment to the others compared with their adjustment to her. In the second quartet, the levels of correction by the first violinist matched those exhibited by the others. These correction patterns may be seen as reflecting contrasting strategies of first-violin-led autocracy versus democracy. The time series approach we propose affords a sensitive method for investigating subtle contrasts in music ensemble synchronization.

  17. Corrective Action Plan for Corrective Action Unit 262: Area 25 Septic Systems and Underground Discharge Point, Nevada Test Site, Nevada

    Energy Technology Data Exchange (ETDEWEB)

    K. B. Campbell

    2002-06-01

    This Corrective Action Plan (CAP) provides selected corrective action alternatives and proposes the closure methodology for Corrective Action Unit (CAU) 262, Area 25 Septic Systems and Underground Discharge Point. CAU 262 is identified in the Federal Facility Agreement and Consent Order (FFACO) of 1996. Remediation of CAU 262 is required under the FFACO. CAU 262 is located in Area 25 of the Nevada Test Site (NTS), approximately 100 kilometers (km) (62 miles [mi]) northwest of Las Vegas, Nevada. The nine Corrective Action Sites (CASs) within CAU 262 are located in the Nuclear Rocket Development Station complex. Individual CASs are located in the vicinity of the Reactor Maintenance, Assembly, and Disassembly (R-MAD); Engine Maintenance, Assembly, and Disassembly (E-MAD); and Test Cell C compounds. CAU 262 includes the following CASs as provided in the FFACO (1996); CAS 25-02-06, Underground Storage Tank; CAS 25-04-06, Septic Systems A and B; CAS 25-04-07, Septic System; CAS 25-05-03, Leachfield; CAS 25-05-05, Leachfield; CAS 25-05-06, Leachfield; CAS 25-05-08, Radioactive Leachfield; CAS 25-05-12, Leachfield; and CAS 25-51-01, Dry Well. Figures 2, 3, and 4 show the locations of the R-MAD, the E-MAD, and the Test Cell C CASs, respectively. The facilities within CAU 262 supported nuclear rocket reactor engine testing. Activities associated with the program were performed between 1958 and 1973. However, several other projects used the facilities after 1973. A significant quantity of radioactive and sanitary waste was produced during routine operations. Most of the radioactive waste was managed by disposal in the posted leachfields. Sanitary wastes were disposed in sanitary leachfields. Septic tanks, present at sanitary leachfields (i.e., CAS 25-02-06,2504-06 [Septic Systems A and B], 25-04-07, 25-05-05,25-05-12) allowed solids to settle out of suspension prior to entering the leachfield. Posted leachfields do not contain septic tanks. All CASs located in CAU 262 are

  18. Post-Editing Error Correction Algorithm for Speech Recognition using Bing Spelling Suggestion

    CERN Document Server

    Bassil, Youssef

    2012-01-01

    ASR short for Automatic Speech Recognition is the process of converting a spoken speech into text that can be manipulated by a computer. Although ASR has several applications, it is still erroneous and imprecise especially if used in a harsh surrounding wherein the input speech is of low quality. This paper proposes a post-editing ASR error correction method and algorithm based on Bing's online spelling suggestion. In this approach, the ASR recognized output text is spell-checked using Bing's spelling suggestion technology to detect and correct misrecognized words. More specifically, the proposed algorithm breaks down the ASR output text into several word-tokens that are submitted as search queries to Bing search engine. A returned spelling suggestion implies that a query is misspelled; and thus it is replaced by the suggested correction; otherwise, no correction is performed and the algorithm continues with the next token until all tokens get validated. Experiments carried out on various speeches in differen...

  19. Intensity inhomogeneity correction of structural MR images: a data-driven approach to define input algorithm parameters

    OpenAIRE

    Marco eGanzetti; Nicole eWenderoth; Dante eMantini

    2016-01-01

    Intensity non-uniformity (INU) in magnetic resonance (MR) imaging is a major issue when conducting analyses of brain structural properties. An inaccurate INU correction may result in qualitative and quantitative misinterpretations. Several INU correction methods exist, whose performance largely depend on the specific parameter settings that need to be chosen by the user. Here we addressed the question of how to select the best input parameters for a specific INU correction algorithm. Our inve...

  20. Written Corrective Feedback: The Practitioners’ Perspective

    Directory of Open Access Journals (Sweden)

    Norman W. Evans

    2010-12-01

    Full Text Available Considerable attention has been given to written corrective feedback (WCF in second language writing (L2 over the past several decades. One of the central questions has focused on the appropriateness of its use in L2 writing. In these academic discussions, scholars frequently describe how WCF is utilized in the classroom. However, many of these claims of teacher practice have no research base, since few studies have actually asked teachers what place WCF has in their writing classroom (Ferris, et al., in press/2011a; Ferris, et al., in press/2011b; Hyland, 2003; Lee, 2004. This paucity of data from teachers about their WCF practices is problematic. Understanding teacher perspectives on corrective feedback is integral to our understanding the place of WCF in L2 writing pedagogy. Accordingly, this article reports on a study that asks two fundamental research questions: (a To what extent do current L2 writing teachers provide WCF? and (b What determines whether or not practitioners choose to provide WCF? These questions were answered by means of an international survey completed by 1,053 L2 writing practitioners in 69 different countries. Results suggest that WCF is commonly practiced in L2 pedagogy by experienced and well-educated L2 practitioners for sound pedagogical reasons.Durante las últimas décadas se ha prestado bastante atención a la pertinencia del empleo de feedback correctivo (FC sobre los textos producidos por los alumnos en una segunda lengua. Aunque hay bastantes descripciones sobre cómo se emplea el FC en el aula, muchas de las afirmaciones sobre la práctica docente no tienen una base científica ya que son pocos los estudios en los que se ha preguntado directamente a los profesores el lugar que el FC ocupa en sus clases (Ferris, et al., in press/2011a; Ferris, et al., in press/2011b; Hyland, 2003; Lee, 2004. Esta escasez de datos es problemática ya que las percepciones de los profesores sobre el del FC son fundamentales a la

  1. QED radiative corrections for electroproduction: modernising the COMPASS code - Summer Student Programme 2015 - Final Report

    CERN Document Server

    Latacz, Barbara Maria

    2015-01-01

    Program TERAD is a well known tool to calculate radiative corrections for an inclusive lepton-nucleus deep inelastic scattering. It was originally written in FORTRAN 77. Several collaborations were using it for many yearsw adding corrections using the Patchy package. After years of using Patchy and TERAD together it needed to be reordered. The new version, called Terad15, is described in this report. It has the same functionality as the old TERAD but is written only in FORTRAN 77.

  2. Large \\theta_13 from finite quantum corrections in quasi-degenerate neutrino mass spectrum

    CERN Document Server

    Araki, Takeshi

    2011-01-01

    We study finite quantum corrections for several well known neutrino mixing matrices and find that it is hard to account for the large value of \\theta_13 recently reported by T2K and MINOS. To nicely reproduce all experimentally favored neutrino mixing angles and masses, we propose a new neutrino mixing pattern. We also demonstrate a simple realization by slightly extending the standard model to illustrate the quantum corrections.

  3. Redrawing the US Obesity Landscape: Bias-Corrected Estimates of State-Specific Adult Obesity Prevalence

    OpenAIRE

    Ward, Zachary J.; Long, Michael W.; Resch, Stephen C.; Gortmaker, Steven L.; Cradock, Angie L.; Catherine Giles; Amber Hsiao; Y Claire Wang

    2016-01-01

    Background: State-level estimates from the Centers for Disease Control and Prevention (CDC) underestimate the obesity epidemic because they use self-reported height and weight. We describe a novel bias-correction method and produce corrected state-level estimates of obesity and severe obesity. Methods: Using non-parametric statistical matching, we adjusted self-reported data from the Behavioral Risk Factor Surveillance System (BRFSS) 2013 (n = 386,795) using measured data from the National He...

  4. Monotone Regression and Correction for Order Relation Deviations in Indicator Kriging

    Institute of Scientific and Technical Information of China (English)

    Han Yan; Yang Yiheng

    2008-01-01

    The indicator kriging (IK) is one of the most efficient nonparametric methods in geo-statistics. The order relation problem in the conditional cumulative distribution values obtained by IK is the most severe drawback of it. The correction of order relation deviations is an essential and important part of IK approach. A monotone regression was proposed as a new correction method which could minimize the deviation from original quintiles value, although, ensuring all order relations.

  5. Aspects of probe correction for odd-order probes in spherical near-field antenna measurements

    DEFF Research Database (Denmark)

    Laitinen, Tommi; Pivnenko, Sergey N.; Breinbjerg, Olav

    2004-01-01

    Probe correction aspects for the spherical near-field antenna measurements are investigated. First, the spherical mode analyses of the radiated fields of several antennas are performed. It is shown that many common antennas are essentially so-called odd-order antennas. Second, the errors caused...... by the use of the first-order probe correction [1] for a rectangular waveguide probe, that is an odd-order antenna, are demonstrated. Third, a recently developed probe correction technique for odd-order probes is applied for the rectangular waveguide probe and shown to provide accurate results....

  6. Incremental Interactive Verification of the Correctness of Object-Oriented Software

    DEFF Research Database (Denmark)

    Mehnert, Hannes

    by Coq. In this dissertation I describe the requirements of Kopitiam and solutions to implementation challenges by presenting several generations of Kopitiam. Kopitiam's usefulness is evaluated qualitatively in an experiment. I also present a formalised correctness proof of the snapshotable tree data...... structure. For efficiency, our implementation uses copy-on-write and shared mutable data, not observable by a client. I further use this data structure to verify the correctness of a solution to the point location problem. The results demonstrate that I am able to verify the correctness of object...

  7. Open End Correction for Flanged Circular Tube from the Diffusion Process

    CERN Document Server

    Ogawa, Naohisa

    2013-01-01

    In the physics education of waves and resonance phenomena at high school, we usually consider the sound waves in a tube with open or closed end as a simple model. However, it is well known that we need end correction $\\Delta L$ for an open end. The value of the correction for franged circular tube was first given by L. Rayleigh and experimentally checked by several authors.In this paper we show the different method to obtain the end correction for circular tube by using the diffusion process.

  8. Hypertelorism and micro-orbit simultaneous correction in a patient with paramedian bilateral facial clefts.

    Science.gov (United States)

    Prada, José Rolando; Mendoza, María Bibiana

    2014-09-01

    The aim of this paper is to report a case of a patient with paramedian bilateral facial clefts and hypertelorism associated with a severe encephalocele and micro-orbit. The patient required a facial bipartition to correct a transsphenoidal encephalocele, and a modified medialization surgery of the orbits to simultaneously expand the micro-orbit and correct the hypertelorism. These procedures achieved hypertelorbitism correction, orbital expansion which allowed symmetrical facial growth, and a functional orbit that permitted the use of an ocular prosthesis. We present this unique case to highlight the predictable results of a procedure that combines 2 surgical reproducible techniques of craniofacial surgery.

  9. Correction of anterior crossbite using modified transparent aligners: An esthetic approach

    Directory of Open Access Journals (Sweden)

    K Korath Abraham

    2016-01-01

    Full Text Available Anterior crossbite results from the abnormal axial inclination of one or more anterior teeth. It is a major esthetic and functional anomaly which has to be corrected in the primary and early mixed dentition period to allow the normal development of maxilla and mandible as well as the occlusion. Several treatment options are available to correct the problem. A unique appliance, "modified transparent tray aligners" was used to correct the anterior crossbite in an 8-year-old child. The clinical presentation, fabrication of the appliance, and the outcome are discussed.

  10. Correction of anterior crossbite using modified transparent aligners: An esthetic approach

    Science.gov (United States)

    Abraham, K. Korath; James, Arun Roy; Thenumkal, Elza; Emmatty, Tharian

    2016-01-01

    Anterior crossbite results from the abnormal axial inclination of one or more anterior teeth. It is a major esthetic and functional anomaly which has to be corrected in the primary and early mixed dentition period to allow the normal development of maxilla and mandible as well as the occlusion. Several treatment options are available to correct the problem. A unique appliance, “modified transparent tray aligners” was used to correct the anterior crossbite in an 8-year-old child. The clinical presentation, fabrication of the appliance, and the outcome are discussed. PMID:27630508

  11. Error-correcting pairs for a public-key cryptosystem

    CERN Document Server

    Márquez-Corbella, Irene

    2012-01-01

    Code-based cryptography is an interesting alternative to classic number-theory PKC since it is conjectured to be secure against quantum computer attacks. Many families of codes have been proposed for these cryptosystems, one of the main requirements is having high performance t-bounded decoding algorithms which in the case of having high an error-correcting pair is achieved. In this article the class of codes with a t-ECP is proposed for the McEliece cryptosystem. The hardness of retrieving the t-ECP for a given code is considered. As a first step distinguishers of several subclasses are given.

  12. Correction of anterior open bite in a case of achondroplasia

    Directory of Open Access Journals (Sweden)

    Karpagam S

    2005-01-01

    Full Text Available Treatment planning for patients with skeletal deformities is often considered challenging. This article reports a female patient with achondroplasia who presented with severe maxillary retrognathism and vertical excess along with anterior open bite. The clinical and cephalometric findings of the patient are detailed here. The treatment plan consisted of modified anterior maxillary osteotomy for simultaneous vertical and sagittal augmentation along with orthodontic intervention. The course of surgical-orthodontic treatment and the results are presented. This treatment is to be followed by correction of vertical maxillary excess after completion of growth. This paper concludes that the dentoalveolar component of a skeletal deformity can be handled independent of the craniofacial management.

  13. Genetic correction using engineered nucleases for gene therapy applications.

    Science.gov (United States)

    Li, Hongmei Lisa; Nakano, Takao; Hotta, Akitsu

    2014-01-01

    Genetic mutations in humans are associated with congenital disorders and phenotypic traits. Gene therapy holds the promise to cure such genetic disorders, although it has suffered from several technical limitations for decades. Recent progress in gene editing technology using tailor-made nucleases, such as meganucleases (MNs), zinc finger nucleases (ZFNs), TAL effector nucleases (TALENs) and, more recently, CRISPR/Cas9, has significantly broadened our ability to precisely modify target sites in the human genome. In this review, we summarize recent progress in gene correction approaches of the human genome, with a particular emphasis on the clinical applications of gene therapy.

  14. Analysis of Sqp current systems by using corrected geomagneticcoordinates

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    The Spq equivalent current system of the quiet day geomagnetic variation in the polar region is very complicated. It is composed of several currents, such as the ionospheric dynamo current and the auroral electrojet caused by the field-aligned current. Spq is unsymmetrical in both polar regions. In this paper, the Spq current systems are analyzed in the corrected geomagnetic coordinates (CGM) instead of the conventional geomagnetic coordinates (GM), and the symmetries of the Spq current indifferent systems are compared. Then the causes of Spq asymmetry in the GM coordinates are discussed; the effects of each component in Spq are determined.

  15. SU-E-I-38: Improved Metal Artifact Correction Using Adaptive Dual Energy Calibration

    Energy Technology Data Exchange (ETDEWEB)

    Dong, X; Elder, E; Roper, J; Dhabaan, A [Winship Cancer Institute of Emory University (United States)

    2015-06-15

    Purpose: The empirical dual energy calibration (EDEC) method corrects for beam-hardening artifacts, but shows limited performance on metal artifact correction. In this work, we propose an adaptive dual energy calibration (ADEC) method to correct for metal artifacts. Methods: The empirical dual energy calibration (EDEC) method corrects for beam-hardening artifacts, but shows limited performance on metal artifact correction. In this work, we propose an adaptive dual energy calibration (ADEC) method to correct for metal artifacts. Results: Highly attenuating copper rods cause severe streaking artifacts on standard CT images. EDEC improves the image quality, but cannot eliminate the streaking artifacts. Compared to EDEC, the proposed ADEC method further reduces the streaking resulting from metallic inserts and beam-hardening effects and obtains material decomposition images with significantly improved accuracy. Conclusion: We propose an adaptive dual energy calibration method to correct for metal artifacts. ADEC is evaluated with the Shepp-Logan phantom, and shows superior metal artifact correction performance. In the future, we will further evaluate the performance of the proposed method with phantom and patient data.

  16. Distortion correction in EPI using an extended PSF method with a reversed phase gradient approach.

    Directory of Open Access Journals (Sweden)

    Myung-Ho In

    Full Text Available In echo-planar imaging (EPI, such as commonly used for functional MRI (fMRI and diffusion-tensor imaging (DTI, compressed distortion is a more difficult challenge than local stretching as spatial information can be lost in strongly compressed areas. In addition, the effects are more severe at ultra-high field (UHF such as 7T due to increased field inhomogeneity. To resolve this problem, two EPIs with opposite phase-encoding (PE polarity were acquired and combined after distortion correction. For distortion correction, a point spread function (PSF mapping method was chosen due to its high correction accuracy and extended to perform distortion correction of both EPIs with opposite PE polarity thus reducing the PSF reference scan time. Because the amount of spatial information differs between the opposite PE datasets, the method was further extended to incorporate a weighted combination of the two distortion-corrected images to maximize the spatial information content of a final corrected image. The correction accuracy of the proposed method was evaluated in distortion-corrected data using both forward and reverse phase-encoded PSF reference data and compared with the reversed gradient approaches suggested previously. Further we demonstrate that the extended PSF method with an improved weighted combination can recover local distortions and spatial information loss and be applied successfully not only to spin-echo EPI, but also to gradient-echo EPIs acquired with both PE directions to perform geometrically accurate image reconstruction.

  17. Refraction Correction in 3D Transcranial Ultrasound Imaging

    Science.gov (United States)

    Lindsey, Brooks D.; Smith, Stephen W.

    2014-01-01

    We present the first correction of refraction in three-dimensional (3D) ultrasound imaging using an iterative approach that traces propagation paths through a two-layer planar tissue model, applying Snell’s law in 3D. This approach is applied to real-time 3D transcranial ultrasound imaging by precomputing delays offline for several skull thicknesses, allowing the user to switch between three sets of delays for phased array imaging at the push of a button. Simulations indicate that refraction correction may be expected to increase sensitivity, reduce beam steering errors, and partially restore lost spatial resolution, with the greatest improvements occurring at the largest steering angles. Distorted images of cylindrical lesions were created by imaging through an acrylic plate in a tissue-mimicking phantom. As a result of correcting for refraction, lesions were restored to 93.6% of their original diameter in the lateral direction and 98.1% of their original shape along the long axis of the cylinders. In imaging two healthy volunteers, the mean brightness increased by 8.3% and showed no spatial dependency. PMID:24275538

  18. Patterns of recontracture after surgical correction of Dupuytren disease.

    Science.gov (United States)

    Dias, Joseph J; Singh, Harvinder Pal; Ullah, Aamer; Bhowal, Bhaskar; Thompson, John R

    2013-10-01

    To study the evolution of deformity of the proximal interphalangeal joint over 5 years after good surgical correction of Dupuytren-induced contracture. We assessed 63 patients (72 fingers; 69 hands) with Dupuytren disease for the degree of contracture, its correction after surgery, and the range of movement at the proximal interphalangeal joints at 3 and 6 months, and 1, 3, and 5 years after fasciectomy with or without the use of a firebreak graft. We investigated associations between the recurrence of contracture and preoperative patient and surgical factors. There were 4 patterns of evolution of contracture after surgical correction. A total of 31 patients (33 hands) showed good improvement that was maintained for 5 years (minimal recontracture group). Twenty patients (23 hands) showed good initial improvement, which mildly worsened ( 20°) but there was no further worsening (severe early recontracture group). Eight patients (8 hands) worsened progressively over 5 years (progressive recontracture group). Worsening of contracture more than 6° between 3 and 6 months after surgery predicted progressive recontracture at 5 years. Recurrence of contracture (not disease recurrence) could be predicted as early as 6 months after surgery for Dupuytren disease. Copyright © 2013 American Society for Surgery of the Hand. Published by Elsevier Inc. All rights reserved.

  19. Developing Formal Correctness Properties from Natural Language Requirements

    Science.gov (United States)

    Nikora, Allen P.

    2006-01-01

    This viewgraph presentation reviews the rationale of the program to transform natural language specifications into formal notation.Specifically, automate generation of Linear Temporal Logic (LTL)correctness properties from natural language temporal specifications. There are several reasons for this approach (1) Model-based techniques becoming more widely accepted, (2) Analytical verification techniques (e.g., model checking, theorem proving) significantly more effective at detecting types of specification design errors (e.g., race conditions, deadlock) than manual inspection, (3) Many requirements still written in natural language, which results in a high learning curve for specification languages, associated tools and increased schedule and budget pressure on projects reduce training opportunities for engineers, and (4) Formulation of correctness properties for system models can be a difficult problem. This has relevance to NASA in that it would simplify development of formal correctness properties, lead to more widespread use of model-based specification, design techniques, assist in earlier identification of defects and reduce residual defect content for space mission software systems. The presentation also discusses: potential applications, accomplishments and/or technological transfer potential and the next steps.

  20. Police and pastoral power: governmentality and correctional forensic psychiatric nursing.

    Science.gov (United States)

    Holmes, Dave

    2002-06-01

    Police and pastoral power: governmentality and correctional forensic psychiatric nursing Since 1978, the federal inmates of Canada have had access to a full range of psychiatric care within the penitentiary system. Several psychiatric units are now integrated into the correctional services of Canada. This paper presents the results of a grounded theory doctoral study undertaken in a multilevel secured psychiatric ward within the Canadian federal penitentiary system. The author describes and discusses the results of qualitative data that emerged from his fieldwork. The concept of governmentality, as defined by the late French philosopher Michel Foucault, constitutes one of the major theoretical tools that were helpful in analyzing these data. Police and pastoral power, two dimensions of the security apparatus of governmentality, were found to be useful in understanding and characterizing nursing practice caught between the penal and the psychiatric dispositifs. A Foucauldian perspective allows one to understand the manner in which forensic psychiatric nursing is involved in the governance of mentally ill inmates through three forms of power - sovereign, disciplinary and pastoral - which have posited nursing practice as a strategic tool of the correctional services. This research consists of a study of nursing practice in an extreme setting that deserves a radical analysis.

  1. Accounting for Chromatic Atmospheric Effects on Barycentric Corrections

    Science.gov (United States)

    Blackman, Ryan T.; Szymkowiak, Andrew E.; Fischer, Debra A.; Jurgenson, Colby A.

    2017-03-01

    Atmospheric effects on stellar radial velocity measurements for exoplanet discovery and characterization have not yet been fully investigated for extreme precision levels. We carry out calculations to determine the wavelength dependence of barycentric corrections across optical wavelengths, due to the ubiquitous variations in air mass during observations. We demonstrate that radial velocity errors of at least several cm s‑1 can be incurred if the wavelength dependence is not included in the photon-weighted barycentric corrections. A minimum of four wavelength channels across optical spectra (380–680 nm) are required to account for this effect at the 10 cm s‑1 level, with polynomial fits of the barycentric corrections applied to cover all wavelengths. Additional channels may be required in poor observing conditions or to avoid strong telluric absorption features. Furthermore, consistent flux sampling on the order of seconds throughout the observation is necessary to ensure that accurate photon weights are obtained. Finally, we describe how a multiple-channel exposure meter will be implemented in the EXtreme PREcision Spectrograph (EXPRES).

  2. Entanglement and Quantum Error Correction with Superconducting Qubits

    Science.gov (United States)

    Reed, Matthew

    2015-03-01

    Quantum information science seeks to take advantage of the properties of quantum mechanics to manipulate information in ways that are not otherwise possible. Quantum computation, for example, promises to solve certain problems in days that would take a conventional supercomputer the age of the universe to decipher. This power does not come without a cost however, as quantum bits are inherently more susceptible to errors than their classical counterparts. Fortunately, it is possible to redundantly encode information in several entangled qubits, making it robust to decoherence and control imprecision with quantum error correction. I studied one possible physical implementation for quantum computing, employing the ground and first excited quantum states of a superconducting electrical circuit as a quantum bit. These ``transmon'' qubits are dispersively coupled to a superconducting resonator used for readout, control, and qubit-qubit coupling in the cavity quantum electrodynamics (cQED) architecture. In this talk I will give an general introduction to quantum computation and the superconducting technology that seeks to achieve it before explaining some of the specific results reported in my thesis. One major component is that of the first realization of three-qubit quantum error correction in a solid state device, where we encode one logical quantum bit in three entangled physical qubits and detect and correct phase- or bit-flip errors using a three-qubit Toffoli gate. My thesis is available at arXiv:1311.6759.

  3. Needed improvements in the development of systemic corrective actions.

    Energy Technology Data Exchange (ETDEWEB)

    Campisi, John A.

    2009-07-01

    There are indications that corrective actions, as implemented at Sandia National Laboratories are not fully adequate. Review of independent audits spanning multiple years provides evidence of recurring issues within the same or similar operations and programs. Several external audits have directly called into question the ability Sandia's assessment and evaluation processes to prevent recurrence. Examples of repeated findings include lockout/tagout programs, local exhaust ventilation controls and radiological controls. Recurrence clearly shows that there are underlying systemic factors that are not being adequately addressed by corrective actions stemming from causal analyses. Information suggests that improvements in the conduct of causal analyses and, more importantly, in the development of subsequent corrective actions are warranted. Current methodolgies include Management Oversight Risk Tree, developed in the early 1970s and Systemic Factors Analysis. Recommendations for improvements include review of other causal analysis systems, training, improved formality of operations, improved documentation, and a corporate method that uses truly systemic solutions. This report was written some years ago and is being published now to form the foundation for current, follow-on reports being developed. Some outdated material is recognized but is retained for report completeness.

  4. Total energy evaluation in the Strutinsky shell correction method.

    Science.gov (United States)

    Zhou, Baojing; Wang, Yan Alexander

    2007-08-14

    We analyze the total energy evaluation in the Strutinsky shell correction method (SCM) of Ullmo et al. [Phys. Rev. B 63, 125339 (2001)], where a series expansion of the total energy is developed based on perturbation theory. In agreement with Yannouleas and Landman [Phys. Rev. B 48, 8376 (1993)], we also identify the first-order SCM result to be the Harris functional [Phys. Rev. B 31, 1770 (1985)]. Further, we find that the second-order correction of the SCM turns out to be the second-order error of the Harris functional, which involves the a priori unknown exact Kohn-Sham (KS) density, rho(KS)(r). Interestingly, the approximation of rho(KS)(r) by rho(out)(r), the output density of the SCM calculation, in the evaluation of the second-order correction leads to the Hohenberg-Kohn-Sham functional. By invoking an auxiliary system in the framework of orbital-free density functional theory, Ullmo et al. designed a scheme to approximate rho(KS)(r), but with several drawbacks. An alternative is designed to utilize the optimal density from a high-quality density mixing method to approximate rho(KS)(r). Our new scheme allows more accurate and complex kinetic energy density functionals and nonlocal pseudopotentials to be employed in the SCM. The efficiency of our new scheme is demonstrated in atomistic calculations on the cubic diamond Si and face-centered-cubic Ag systems.

  5. Automatic gray scale correction of video data

    Science.gov (United States)

    Chochia, Pavel A.

    1995-01-01

    Automatic gray scale correction of captured video data (both still and moving images) is one of the least researched questions in the image processing area, in spite of this the question is touched almost in every book concerned with image processing. Classically it is related to the image enhancement, and frequently is classified as histogram modification techniques. Traditionally used algorithms, based on analysis of the image histogram, are not able to decide the problem properly. The investigating difficulties are associated with the absence of a formal quantitative estimate of image quality -- till now the most often used criteria are human visual perception and experience. Hence, the problem of finding out some measurable properties of real images, which might be the basis for automatic building of gray scale correction function (sometimes identified also as gamma-correction function), is still unsolved. In the paper we try to discern some common properties of real images that could help us to evaluate the gray scale image distortion, and, finally, to construct the appropriate correction function to enhance an image. Such a method might be sufficiently used for automatic image processing procedures, like enhancing of medical images, reproducing of pictures in the publishing industry, correcting of remote sensing images, preprocessing of captured data in the computer vision area, and for many other applications. The question of complexity of analysis procedure becomes important when an algorithm is realized in real-time (for example in video input devices, like video cameras).

  6. Revisit of Sheppard corrections in linear regression

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    Dempster and Rubin(D&R) in their JRSSB paper considered the statistical error caused by data rounding in a linear regression model and compared the Sheppard correction,BRB correction and the ordinary LSE by simulations.Some asymptotic results when the rounding scale tends to 0 were also presented.In a previous research,we found that the ordinary sample variance of rounded data from normal populations is always inconsistent while the sample mean of rounded data is consistent if and only if the true mean is a multiple of the half rounding scale.In the light of these results,in this paper we further investigate the rounding errors in linear regressions.We notice that these results form the basic reasons that the Sheppard corrections perform better than other methods in D&R examples and their conclusion in general cases is incorrect.Examples in which the Sheppard correction works worse than the BRB correction are also given.Furthermore,we propose a new approach to estimate the parameters,called "two-stage estimator",and establish the consistency and asymptotic normality of the new estimators.

  7. Isochronicity Correction in the CR Storage Ring

    CERN Document Server

    Litvinov, S; Weick, H; Dolinskii, A

    2013-01-01

    A challenge for nuclear physics is to measure masses of exotic nuclei up to the limits of nuclear existence which are characterized by low production cross sections and short half-lives. The large acceptance Collector Ring (CR) at FAIR tuned in the isochronous ion-optical mode offers unique possibilities for measuring short-lived and very exotic nuclides. However, in a ring designed for maximal acceptance, many factors limit the resolution. One point is a limit in time resolution inversely proportional to the transverse emittance. But most of the time aberrations can be corrected and others become small for large number of turns. We show the relations of the time correction to the corresponding transverse focusing and that the main correction for large emittance corresponds directly to the chromaticity correction for transverse focusing of the beam. With the help of Monte-Carlo simulations for the full acceptance we demonstrate how to correct the revolution times so that in principle resolutions of dm/m=1E-6 ...

  8. Spacetime curvature induced corrections to Lamb shift

    CERN Document Server

    Zhou, Wenting

    2012-01-01

    The Lamb shift results from the coupling of an atom with vacuum fluctuations of quantum fields, so corrections are expected to arise when the spacetime is curved since the vacuum fluctuations are modified by the presence of spacetime curvature. Here, we calculate the curvature-induced correction to the Lamb shift outside a spherically symmetric object and demonstrate that this correction can be remarkably significant outside a compact massive astrophysical body. For instance, for a neutron star or a stellar mass black hole, the correction is $\\sim$ 25% at a radial distance of $4GM/c^2$, $\\sim$ 16% at $10GM/c^2$ and as large as $\\sim$ 1.6% even at $100GM/c^2$, where $M$ is the mass of the object, $G$ the Newtonian constant, and $c$ the speed of light. In principle, we can look at the spectra from a distant compact supper-massive body to find such corrections. Therefore, our results suggest a possible way of detecting fundamental quantum effects in astronomical observations.

  9. Probabilistic error correction for RNA sequencing.

    Science.gov (United States)

    Le, Hai-Son; Schulz, Marcel H; McCauley, Brenna M; Hinman, Veronica F; Bar-Joseph, Ziv

    2013-05-01

    Sequencing of RNAs (RNA-Seq) has revolutionized the field of transcriptomics, but the reads obtained often contain errors. Read error correction can have a large impact on our ability to accurately assemble transcripts. This is especially true for de novo transcriptome analysis, where a reference genome is not available. Current read error correction methods, developed for DNA sequence data, cannot handle the overlapping effects of non-uniform abundance, polymorphisms and alternative splicing. Here we present SEquencing Error CorrEction in Rna-seq data (SEECER), a hidden Markov Model (HMM)-based method, which is the first to successfully address these problems. SEECER efficiently learns hundreds of thousands of HMMs and uses these to correct sequencing errors. Using human RNA-Seq data, we show that SEECER greatly improves on previous methods in terms of quality of read alignment to the genome and assembly accuracy. To illustrate the usefulness of SEECER for de novo transcriptome studies, we generated new RNA-Seq data to study the development of the sea cucumber Parastichopus parvimensis. Our corrected assembled transcripts shed new light on two important stages in sea cucumber development. Comparison of the assembled transcripts to known transcripts in other species has also revealed novel transcripts that are unique to sea cucumber, some of which we have experimentally validated. Supporting website: http://sb.cs.cmu.edu/seecer/.

  10. Target Uncertainty Mediates Sensorimotor Error Correction.

    Science.gov (United States)

    Acerbi, Luigi; Vijayakumar, Sethu; Wolpert, Daniel M

    2017-01-01

    Human movements are prone to errors that arise from inaccuracies in both our perceptual processing and execution of motor commands. We can reduce such errors by both improving our estimates of the state of the world and through online error correction of the ongoing action. Two prominent frameworks that explain how humans solve these problems are Bayesian estimation and stochastic optimal feedback control. Here we examine the interaction between estimation and control by asking if uncertainty in estimates affects how subjects correct for errors that may arise during the movement. Unbeknownst to participants, we randomly shifted the visual feedback of their finger position as they reached to indicate the center of mass of an object. Even though participants were given ample time to compensate for this perturbation, they only fully corrected for the induced error on trials with low uncertainty about center of mass, with correction only partial in trials involving more uncertainty. The analysis of subjects' scores revealed that participants corrected for errors just enough to avoid significant decrease in their overall scores, in agreement with the minimal intervention principle of optimal feedback control. We explain this behavior with a term in the loss function that accounts for the additional effort of adjusting one's response. By suggesting that subjects' decision uncertainty, as reflected in their posterior distribution, is a major factor in determining how their sensorimotor system responds to error, our findings support theoretical models in which the decision making and control processes are fully integrated.

  11. Target Uncertainty Mediates Sensorimotor Error Correction

    Science.gov (United States)

    Vijayakumar, Sethu; Wolpert, Daniel M.

    2017-01-01

    Human movements are prone to errors that arise from inaccuracies in both our perceptual processing and execution of motor commands. We can reduce such errors by both improving our estimates of the state of the world and through online error correction of the ongoing action. Two prominent frameworks that explain how humans solve these problems are Bayesian estimation and stochastic optimal feedback control. Here we examine the interaction between estimation and control by asking if uncertainty in estimates affects how subjects correct for errors that may arise during the movement. Unbeknownst to participants, we randomly shifted the visual feedback of their finger position as they reached to indicate the center of mass of an object. Even though participants were given ample time to compensate for this perturbation, they only fully corrected for the induced error on trials with low uncertainty about center of mass, with correction only partial in trials involving more uncertainty. The analysis of subjects’ scores revealed that participants corrected for errors just enough to avoid significant decrease in their overall scores, in agreement with the minimal intervention principle of optimal feedback control. We explain this behavior with a term in the loss function that accounts for the additional effort of adjusting one’s response. By suggesting that subjects’ decision uncertainty, as reflected in their posterior distribution, is a major factor in determining how their sensorimotor system responds to error, our findings support theoretical models in which the decision making and control processes are fully integrated. PMID:28129323

  12. Partial Volume Correction in Quantitative Amyloid Imaging

    Science.gov (United States)

    Su, Yi; Blazey, Tyler M.; Snyder, Abraham Z.; Raichle, Marcus E.; Marcus, Daniel S.; Ances, Beau M.; Bateman, Randall J.; Cairns, Nigel J.; Aldea, Patricia; Cash, Lisa; Christensen, Jon J.; Friedrichsen, Karl; Hornbeck, Russ C.; Farrar, Angela M.; Owen, Christopher J.; Mayeux, Richard; Brickman, Adam M.; Klunk, William; Price, Julie C.; Thompson, Paul M.; Ghetti, Bernardino; Saykin, Andrew J.; Sperling, Reisa A.; Johnson, Keith A.; Schofield, Peter R.; Buckles, Virginia; Morris, John C.; Benzinger, Tammie. LS.

    2014-01-01

    Amyloid imaging is a valuable tool for research and diagnosis in dementing disorders. As positron emission tomography (PET) scanners have limited spatial resolution, measured signals are distorted by partial volume effects. Various techniques have been proposed for correcting partial volume effects, but there is no consensus as to whether these techniques are necessary in amyloid imaging, and, if so, how they should be implemented. We evaluated a two-component partial volume correction technique and a regional spread function technique using both simulated and human Pittsburgh compound B (PiB) PET imaging data. Both correction techniques compensated for partial volume effects and yielded improved detection of subtle changes in PiB retention. However, the regional spread function technique was more accurate in application to simulated data. Because PiB retention estimates depend on the correction technique, standardization is necessary to compare results across groups. Partial volume correction has sometimes been avoided because it increases the sensitivity to inaccuracy in image registration and segmentation. However, our results indicate that appropriate PVC may enhance our ability to detect changes in amyloid deposition. PMID:25485714

  13. Fractal Correction of Well Logging Curves

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    It is always significant for assessing and evaluation of oil-bearing layers, especially for well logging data processing and interpretation of non-marine oil beds to get more accurate physical properties in thin and inter-thin layers. This paper presents a definition of measures and the measure presents power law relation with the corresponded scale described by fractal theory. Thus, logging curves can be reconstructed according to this power law relation. This method uses the local structure nearby concurrent points to com pensate the average effect of logging probes and measurement errors. As an example, deep and medium induced conductivity (IMPH and IDPH) curves in ODP Leg 127 Hole 797C are reconstructed or corrected. Corrected curves are with less adjacent effects through comparison of corrected curves with original one. And also, the power spectra of corrected well logging curve are abounding with more resolution components than the original one. Thus, fractal correction method makes the well logging more resoluble for thin beds.``

  14. Simple Correction of Alar Retraction by Conchal Cartilage Extension Grafts

    Directory of Open Access Journals (Sweden)

    Yong Jun Jang

    2016-11-01

    Full Text Available BackgroundAlar retraction is a challenging condition in rhinoplasty marked by exaggerated nostril exposure and awkwardness. Although various methods for correcting alar retraction have been introduced, none is without drawbacks. Herein, we report a simple procedure that is both effective and safe for correcting alar retraction using only conchal cartilage grafting.MethodsBetween August 2007 and August 2009, 18 patients underwent conchal cartilage extension grafting to correct alar retraction. Conchal cartilage extension grafts were fixed to the caudal margins of the lateral crura and covered with vestibular skin advancement flaps. Preoperative and postoperative photographs were reviewed and analyzed. Patient satisfaction was surveyed and categorized into 4 groups (very satisfied, satisfied, moderate, or unsatisfied.ResultsAccording to the survey, 8 patients were very satisfied, 9 were satisfied, and 1 considered the outcome moderate, resulting in satisfaction for most patients. The average distance from the alar rim to the long axis of the nostril was reduced by 1.4 mm (3.6 to 2.2 mm. There were no complications, except in 2 cases with palpable cartilage step-off that resolved without any aesthetic problems.ConclusionsConchal cartilage alar extension graft is a simple, effective method of correcting alar retraction that can be combined with aesthetic rhinoplasty conveniently, utilizing conchal cartilage, which is the most similar cartilage to alar cartilage, and requiring a lesser volume of cartilage harvest compared to previously devised methods. However, the current procedure lacks efficacy for severe alar retraction and a longer follow-up period may be required to substantiate the enduring efficacy of the current procedure.

  15. Cerebellar substrates for error correction in motor conditioning.

    Science.gov (United States)

    Gluck, M A; Allen, M T; Myers, C E; Thompson, R F

    2001-11-01

    The authors evaluate a mapping of Rescorla and Wagner's (1972) behavioral model of classical conditioning onto the cerebellar substrates for motor reflex learning and illustrate how the limitations of the Rescorla-Wagner model are just as useful as its successes for guiding the development of new psychobiological theories of learning. They postulate that the inhibitory pathway that returns conditioned response information from the cerebellar interpositus nucleus back to the inferior olive is the neural basis for the error correction learning proposed by Rescorla and Wagner (Gluck, Myers, & Thompson, 1994; Thompson, 1986). The authors' cerebellar model expects that behavioral processes described by the Rescorla-Wagner model will be localized within the cerebellum and related brain stem structures, whereas behavioral processes beyond the scope of the Rescorla-Wagner model will depend on extracerebellar structures such as the hippocampus and related cortical regions. Simulations presented here support both implications. Several novel implications of the authors' cerebellar error-correcting model are described including a recent empirical study by Kim, Krupa, and Thompson (1998), who verified that suppressing the putative error correction pathway should interfere with the Kamin (1969) blocking effect, a behavioral manifestation of error correction learning. The authors also discuss the model's implications for understanding the limits of cerebellar contributions to associative learning and how this informs our understanding of hippocampal function in conditioning. This leads to a more integrative view of the neural substrates of conditioning in which the authors' real-time circuit-level model of the cerebellum can be viewed as a generalization of the long-term memory module of Gluck and Myers' (1993) trial-level theory of cerebellar-hippocampal interaction in motor conditioning.

  16. Error-correcting pairs for a public-key cryptosystem

    Science.gov (United States)

    Pellikaan, Ruud; Márquez-Corbella, Irene

    2017-06-01

    Code-based Cryptography (CBC) is a powerful and promising alternative for quantum resistant cryptography. Indeed, together with lattice-based cryptography, multivariate cryptography and hash-based cryptography are the principal available techniques for post-quantum cryptography. CBC was first introduced by McEliece where he designed one of the most efficient Public-Key encryption schemes with exceptionally strong security guarantees and other desirable properties that still resist to attacks based on Quantum Fourier Transform and Amplitude Amplification. The original proposal, which remains unbroken, was based on binary Goppa codes. Later, several families of codes have been proposed in order to reduce the key size. Some of these alternatives have already been broken. One of the main requirements of a code-based cryptosystem is having high performance t-bounded decoding algorithms which is achieved in the case the code has a t-error-correcting pair (ECP). Indeed, those McEliece schemes that use GRS codes, BCH, Goppa and algebraic geometry codes are in fact using an error-correcting pair as a secret key. That is, the security of these Public-Key Cryptosystems is not only based on the inherent intractability of bounded distance decoding but also on the assumption that it is difficult to retrieve efficiently an error-correcting pair. In this paper, the class of codes with a t-ECP is proposed for the McEliece cryptosystem. Moreover, we study the hardness of distinguishing arbitrary codes from those having a t-error correcting pair.

  17. Simple Correction of Alar Retraction by Conchal Cartilage Extension Grafts.

    Science.gov (United States)

    Jang, Yong Jun; Kim, Sung Min; Lew, Dae Hyun; Song, Seung Yong

    2016-11-01

    Alar retraction is a challenging condition in rhinoplasty marked by exaggerated nostril exposure and awkwardness. Although various methods for correcting alar retraction have been introduced, none is without drawbacks. Herein, we report a simple procedure that is both effective and safe for correcting alar retraction using only conchal cartilage grafting. Between August 2007 and August 2009, 18 patients underwent conchal cartilage extension grafting to correct alar retraction. Conchal cartilage extension grafts were fixed to the caudal margins of the lateral crura and covered with vestibular skin advancement flaps. Preoperative and postoperative photographs were reviewed and analyzed. Patient satisfaction was surveyed and categorized into 4 groups (very satisfied, satisfied, moderate, or unsatisfied). According to the survey, 8 patients were very satisfied, 9 were satisfied, and 1 considered the outcome moderate, resulting in satisfaction for most patients. The average distance from the alar rim to the long axis of the nostril was reduced by 1.4 mm (3.6 to 2.2 mm). There were no complications, except in 2 cases with palpable cartilage step-off that resolved without any aesthetic problems. Conchal cartilage alar extension graft is a simple, effective method of correcting alar retraction that can be combined with aesthetic rhinoplasty conveniently, utilizing conchal cartilage, which is the most similar cartilage to alar cartilage, and requiring a lesser volume of cartilage harvest compared to previously devised methods. However, the current procedure lacks efficacy for severe alar retraction and a longer follow-up period may be required to substantiate the enduring efficacy of the current procedure.

  18. Mie scatter corrections in single cell infrared microspectroscopy.

    Science.gov (United States)

    Konevskikh, Tatiana; Lukacs, Rozalia; Blümel, Reinhold; Ponossov, Arkadi; Kohler, Achim

    2016-06-23

    Strong Mie scattering signatures hamper the chemical interpretation and multivariate analysis of the infrared microscopy spectra of single cells and tissues. During recent years, several numerical Mie scatter correction algorithms for the infrared spectroscopy of single cells have been published. In the paper at hand, we critically reviewed existing algorithms for the correction of Mie scattering and suggest improvements. We developed an iterative algorithm based on Extended Multiplicative Scatter Correction (EMSC), for the retrieval of pure absorbance spectra from highly distorted infrared spectra of single cells. The new algorithm uses the van de Hulst approximation formula for the extinction efficiency employing a complex refractive index. The iterative algorithm involves the establishment of an EMSC meta-model. While existing iterative algorithms for the correction of resonant Mie scattering employ three independent parameters for establishing a meta-model, we could decrease the number of parameters from three to two independent parameters, which reduced the calculation time for the Mie scattering curves for the iterative EMSC meta-model by a factor of 10. Moreover, by employing the Hilbert transform for evaluating the Kramers-Kronig relations based on a FFT algorithm in Matlab, we further improved the speed of the algorithm by a factor of 100. For testing the algorithm we simulate distorted apparent absorbance spectra by utilizing the exact theory for the scattering of infrared light at absorbing spheres, taking into account the high numerical aperture of infrared microscopes employed for the analysis of single cells and tissues. In addition, the algorithm was applied to measured absorbance spectra of single lung cancer cells.

  19. Carbon-wire loop based artifact correction outperforms post-processing EEG/fMRI corrections--A validation of a real-time simultaneous EEG/fMRI correction method.

    Science.gov (United States)

    van der Meer, Johan N; Pampel, André; Van Someren, Eus J W; Ramautar, Jennifer R; van der Werf, Ysbrand D; Gomez-Herrero, German; Lepsien, Jöran; Hellrung, Lydia; Hinrichs, Hermann; Möller, Harald E; Walter, Martin

    2016-01-15

    Simultaneous EEG-fMRI combines two powerful neuroimaging techniques, but the EEG signal suffers from severe artifacts in the MRI environment that are difficult to remove. These are the MR scanning artifact and the blood-pulsation artifact--strategies to remove them are a topic of ongoing research. Additionally large, unsystematic artifacts are produced across the full frequency spectrum by the magnet's helium pump (and ventilator) systems which are notoriously hard to remove. As a consequence, experimenters routinely deactivate the helium pump during simultaneous EEG-fMRI acquisitions which potentially risks damaging the MRI system and necessitates more frequent and expensive helium refills. We present a novel correction method addressing both helium pump and ballisto-cardiac (BCG) artifacts, consisting of carbon-wire loops (CWL) as additional sensors to accurately track unpredictable artifacts related to subtle movements in the scanner, and an EEGLAB plugin to perform artifact correction. We compare signal-to-noise metrics of EEG data, corrected with CWL and three conventional correction methods, for helium pump off and on measurements. Because the CWL setup records signals in real-time, it fits requirements of applications where immediate correction is necessary, such as neuro-feedback applications or stimulation time-locked to specific sleep oscillations. The comparison metrics in this paper relate to: (1) the EEG signal itself, (2) the "eyes open vs. eyes closed" effect, and (3) an assessment of how the artifact corrections impacts the ability to perform meaningful correlations between EEG alpha power and the BOLD signal. Results show that the CWL correction corrects for He pump artifact and also produces EEG data more comparable to EEG obtained outside the magnet than conventional post-processing methods.

  20. Severe Weather Planning for Schools

    Science.gov (United States)

    Watson, Barbara McNaught; Strong, Christopher; Bunting, Bill

    2008-01-01

    Flash floods, severe thunderstorms, and tornadoes occur with rapid onset and often no warning. Decisions must be made quickly and actions taken immediately. This paper provides tips for schools on: (1) Preparing for Severe Weather Emergencies; (2) Activating a Severe Weather Plan; (3) Severe Weather Plan Checklist; and (4) Periodic Drills and…

  1. Systeme de fautes et correction phonetique par la methode verbo-tonale des francophones belges qui apprenent l'espagnol (Phonetic Correction and the Verbo-tonal Method for Teaching Spanish to French-speaking Belgians)

    Science.gov (United States)

    Sarmiento Padilla, Jose

    1974-01-01

    Describes experiments in the field of phonetic correction. Several techniques used at the University of Mons for teaching Spanish pronunciation to French-speaking Belgians are explained. (Text is in French.) (PMP)

  2. Respiration correction by clustering in ultrasound images

    Science.gov (United States)

    Wu, Kaizhi; Chen, Xi; Ding, Mingyue; Sang, Nong

    2016-03-01

    Respiratory motion is a challenging factor for image acquisition, image-guided procedures and perfusion quantification using contrast-enhanced ultrasound in the abdominal and thoracic region. In order to reduce the influence of respiratory motion, respiratory correction methods were investigated. In this paper we propose a novel, cluster-based respiratory correction method. In the proposed method, we assign the image frames of the corresponding respiratory phase using spectral clustering firstly. And then, we achieve the images correction automatically by finding a cluster in which points are close to each other. Unlike the traditional gating method, we don't need to estimate the breathing cycle accurate. It is because images are similar at the corresponding respiratory phase, and they are close in high-dimensional space. The proposed method is tested on simulation image sequence and real ultrasound image sequence. The experimental results show the effectiveness of our proposed method in quantitative and qualitative.

  3. Relative motion correction to fission barriers

    CERN Document Server

    Skalski, J

    2007-01-01

    We discuss the effect of kinetic energy of the relative motion becoming spurious for separate fragments on the selfconsistent mean-field fission barriers. The treatment of the relative motion in the cluster model is contrasted with the necessity of a simpler and approximate approach in the mean-field theory. A scheme of the energy correction to the Hartree-Fock is proposed. The results obtained with the effective Skyrme interaction SLy6 show that the correction, previously estimated as $\\sim$ 8 MeV in $A=70-100$ nuclei, amounts to 4 MeV in the medium heavy nucleus $^{198}$Hg and to null in $^{238}$U. However, the corrected barrier implies a shorter fission half-life of the latter nucleus. The same effect is expected to lower barriers for multipartition (i.e. ternary fission, etc) and make hyperdeformed minima less stable.

  4. Relative Motion Correction to Fission Barriers

    Science.gov (United States)

    Skalski, J.

    We discuss the effect of kinetic energy of the relative motion becoming spurious for separate fragments on the selfconsistent mean-field fission barriers. The treatment of the relative motion in the cluster model is contrasted with the necessity of a simpler and approximate approach in the mean-field theory. A scheme of the energy correction to the Hartree-Fock is proposed. The results obtained with the effective Skyrme interaction SLy6 show that the correction, previously estimated as ~ 8 MeV in A = 70 - 100 nuclei, amounts to 4 MeV in the medium heavy nucleus 198Hg and to null in 238U. However, the corrected barrier implies a shorter fission half-life of the latter nucleus. The same effect is expected to lower barriers for multipartition (i.e. ternary fission, etc) and make hyperdeformed minima less stable.

  5. RCRA corrective action program guide (Interim)

    Energy Technology Data Exchange (ETDEWEB)

    1993-05-01

    The US Department of Energy (DOE) is responsible for compliance with an increasingly complex spectrum of environmental regulations. One of the most complex programs is the corrective action program proposed by the US Environmental Protection Agency (EPA) under the authority of the Resource Conservation and Recovery Act (RCRA) as amended by the Hazardous and Solid Waste Amendments (HSWA). The proposed regulations were published on July 27, 1990. The proposed Subpart S rule creates a comprehensive program for investigating and remediating releases of hazardous wastes and hazardous waste constituents from solid waste management units (SWMUs) at facilities permitted to treat, store, or dispose of hazardous wastes. This proposed rule directly impacts many DOE facilities which conduct such activities. This guidance document explains the entire RCRA Corrective Action process as outlined by the proposed Subpart S rule, and provides guidance intended to assist those persons responsible for implementing RCRA Corrective Action at DOE facilities.

  6. Thermal corrections to the Casimir effect

    CERN Document Server

    Brevik, I; Milton, K A; Brevik, Iver; Ellingsen, Simen A.; Milton, Kimball A.

    2006-01-01

    The Casimir effect, reflecting quantum vacuum fluctuations in the electromagnetic field in a region with material boundaries, has been studied both theoretically and experimentally since 1948. The forces between dielectric and metallic surfaces both plane and curved have been measured at the 10 to 1 percent level in a variety of room-temperature experiments, and remarkable agreement with the zero-temperature theory has been achieved. In fitting the data various corrections due to surface roughness, patch potentials, curvature, and temperature have been incorporated. It is the latter that is the subject of the present article. We point out that, in fact, no temperature dependence has yet been detected, and that the experimental situation is still too fluid to permit conclusions about thermal corrections to the Casimir effect. Theoretically, there are subtle issues concerning thermodynamics and electrodynamics which have resulted in disparate predictions concerning the nature of these corrections. However, a ge...

  7. Quantum corrected Schwarzschild thin-shell wormhole

    Energy Technology Data Exchange (ETDEWEB)

    Jusufi, Kimet [State University of Tetovo, Physics Department, Tetovo (Macedonia, The Former Yugoslav Republic of)

    2016-11-15

    Recently, Ali and Khalil (Nucl Phys B, 909, 173-185, 2016), based on Bohmian quantum mechanics, derived a quantum corrected version of the Schwarzschild metric. In this paper, we construct a quantum corrected Schwarzschild thin-shell wormhole (QSTSW) and investigate the stability of this wormhole. First we compute the surface stress at the wormhole throat by applying the Darmois-Israel formalism to the modified Schwarzschild metric and show that exotic matter is required at the throat to keep the wormhole stable. We then study the stability analysis of the wormhole by considering phantom-energy for the exotic matter, generalized Chaplygin gas (GCG), and the linearized stability analysis. It is argued that quantum corrections can affect the stability domain of the wormhole. (orig.)

  8. Quantum corrected Schwarzschild thin-shell wormhole

    Science.gov (United States)

    Jusufi, Kimet

    2016-11-01

    Recently, Ali and Khalil (Nucl Phys B, 909, 173-185, 2016), based on Bohmian quantum mechanics, derived a quantum corrected version of the Schwarzschild metric. In this paper, we construct a quantum corrected Schwarzschild thin-shell wormhole (QSTSW) and investigate the stability of this wormhole. First we compute the surface stress at the wormhole throat by applying the Darmois-Israel formalism to the modified Schwarzschild metric and show that exotic matter is required at the throat to keep the wormhole stable. We then study the stability analysis of the wormhole by considering phantom-energy for the exotic matter, generalized Chaplygin gas (GCG), and the linearized stability analysis. It is argued that quantum corrections can affect the stability domain of the wormhole.

  9. Quantum Corrected Schwarzschild Thin Shell Wormhole

    CERN Document Server

    Jusufi, Kimet

    2016-01-01

    Recently, Ali and Khalil \\cite{ahmed}, based on the Bohmian quantum mechanics derived a quantum corrected version of the Schwarzschild metric. In this paper, we construct a quantum corrected Schwarzschild thin shell wormhole (QSTSW) and investigate the stability of this wormhole. First we compute the surface stress at the wormhole throat by applying the Darmois-Israel formalism to the modified Schwarzschild metric and show that exotic matter is required at the throat to keep the wormhole stable. We then study the stability analysis of the wormhole by considering phantom-energy for the exotic matter, generalized Chaplygin gas (GCG), and the linearized stability analysis. It is argued that, quantum corrections can affect the stability domain of the wormhole.

  10. Mobile image based color correction using deblurring

    Science.gov (United States)

    Wang, Yu; Xu, Chang; Boushey, Carol; Zhu, Fengqing; Delp, Edward J.

    2015-03-01

    Dietary intake, the process of determining what someone eats during the course of a day, provides valuable insights for mounting intervention programs for prevention of many chronic diseases such as obesity and cancer. The goals of the Technology Assisted Dietary Assessment (TADA) System, developed at Purdue University, is to automatically identify and quantify foods and beverages consumed by utilizing food images acquired with a mobile device. Color correction serves as a critical step to ensure accurate food identification and volume estimation. We make use of a specifically designed color checkerboard (i.e. a fiducial marker) to calibrate the imaging system so that the variations of food appearance under different lighting conditions can be determined. In this paper, we propose an image quality enhancement technique by combining image de-blurring and color correction. The contribution consists of introducing an automatic camera shake removal method using a saliency map and improving the polynomial color correction model using the LMS color space.

  11. Image correction in magneto-optical microscopy

    DEFF Research Database (Denmark)

    Paturi, P.; Larsen, B.H.; Jacobsen, B.A.

    2003-01-01

    An image-processing procedure that assures correct determination of the magnetic field distribution of magneto-optical images is presented. The method remedies image faults resulting from sources that are proportional to the incident light intensity, such as different types of defects in the indi......An image-processing procedure that assures correct determination of the magnetic field distribution of magneto-optical images is presented. The method remedies image faults resulting from sources that are proportional to the incident light intensity, such as different types of defects...... in the indicator film and unevenness of light, as well as additive signals from detector bias, external light sources, etc. When properly corrected a better measurement of the local magnetic field can be made, even in the case of heavily damaged films. For superconductors the magnetic field distributions may...

  12. Bias-correction in vector autoregressive models

    DEFF Research Database (Denmark)

    Engsted, Tom; Pedersen, Thomas Quistgaard

    2014-01-01

    We analyze the properties of various methods for bias-correcting parameter estimates in both stationary and non-stationary vector autoregressive models. First, we show that two analytical bias formulas from the existing literature are in fact identical. Next, based on a detailed simulation study......, we show that when the model is stationary this simple bias formula compares very favorably to bootstrap bias-correction, both in terms of bias and mean squared error. In non-stationary models, the analytical bias formula performs noticeably worse than bootstrapping. Both methods yield a notable...... improvement over ordinary least squares. We pay special attention to the risk of pushing an otherwise stationary model into the non-stationary region of the parameter space when correcting for bias. Finally, we consider a recently proposed reduced-bias weighted least squares estimator, and we find...

  13. Housekeeping category corrective action unit work plan

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-08-01

    The purpose of this Corrective Action Unit (CAU) Work Plan is to provide a strategy to be used by the US Department of Energy Nevada Operations Office (DOE/NV), the US Department of Defense (DoD) Defense Special Weapons Agency (DSWA) (formerly the Defense Nuclear Agency), and contractor personnel for conducting corrective actions at the Nevada Test Site (NTS) and Nevada off-site locations including the Tonopah Test Range (TTR), the Project Shoal Area, and the Central Nevada Test Area. This Work Plan applies to housekeeping category CAUs already listed in the Federal Facility Agreement and Consent Order (FFACO) Appendices (FFACO, 1996) as well as newly identified Corrective Action Sites (CASs) that will follow the housekeeping process.

  14. moco: Fast Motion Correction for Calcium Imaging

    Directory of Open Access Journals (Sweden)

    Alexander eDubbs

    2016-02-01

    Full Text Available Motion correction is the first step in a pipeline of algorithms to analyze calcium imaging videos and extract biologically relevant information, for example the network structure of the neurons therein. Fast motion correction is especially critical for closed-loop activity triggered stimulation experiments, where accurate detection and targeting of specific cells in necessary. We introduce a novel motion-correction algorithm that uses a Fourier-transform approach, and a combination of judicious downsampling and the accelerated computation of many $L_2$ norms using dynamic programming and two-dimensional, fft-accelerated convolutions, to enhance its efficiency. Its accuracy is comparable to that of established community-used algorithms, and it is more stable to large translational motions. It is programmed in Java and is compatible with ImageJ.

  15. Longitudinal wake field corrections in circular machines

    Energy Technology Data Exchange (ETDEWEB)

    Symon, K.R.

    1996-10-01

    In computations of longitudinal particle motions in accelerators and storage rings, the fields produced by the interactions of the beam with the cavity in which it circulates are usually calculated by multiplying Fourier components of the beam current by the appropriate impedances. This procedure neglects the slow variation with time of the Fourier coefficients and of the beam revolution frequency. When there are cavity elements with decay times that are comparable with or larger than the time during which changes in the beam parameters occur, these changes can not be neglected. Corrections for this effect have been worked out in terms of the response functions of elements in the ring. The result is expressed as a correction to the impedance which depends on the way in which the beam parameters are changing. A method is presented for correcting a numerical simulation by keeping track of the steady state and transient terms in the response of a cavity.

  16. Entropy Correction for Kerr Black Hole

    Institute of Scientific and Technical Information of China (English)

    ZHAO Ren; ZHANG Sheng-Li

    2005-01-01

    In this paper, we discuss leading-order corrections to the entropy of Kerr black hole due to thermal fluctuations in the finite cavity. Then temperature is constant, the solution of the black hole is obtained within a cavity, that is, the solution of the spacetime after considering the radiation of the black hole. Therefore, we derive that the location of the black hole horizon and specific heat are the functions of temperature and the radius of the cavity.Corrections to entropy also are related to the radius of the cavity. Through calculation, we obtain conditions of taking the value of the cavity's radius. We provide a new way for studying the corrections of complicated spacetimes.

  17. Correction: An Indicator of Media Credibility

    Directory of Open Access Journals (Sweden)

    Gordana Vilović

    2010-12-01

    Full Text Available The regularity of publishing corrections, clarifi cations, and letters to the editor, entail a high level of respect among the media for their audiences as they signify accountability and media credibility.This study began on the general assumption that the Croatian media is reluctant to publish corrections regularly, projecting an image that errors simply do not occur. Certainly errorless reporting is impossible due to fact that journalism is a profession prone to human error. Therefore, this study has enacted a content analysis methodology to follow the four primary Croatian daily newspapers, Jutarnji list, Večernji list, 24 sata and Vjesnik, for the period between May 6 and 30, 2010. The primary conclusion is that Croatian newspaper editors are hesitant to publish corrections if they are not under pressure from the Media Law.

  18. Quantum Corrections in Galileons from Matter Loops

    CERN Document Server

    Heisenberg, Lavinia

    2014-01-01

    Galileon interactions represent a class of effective field theories that have received much attention since their inception. They can be treated in their own right as scalar field theories with a specific global shift and Galilean symmetry or as a descendant of a more fundamental theory like massive gravity. It is well known that the Galileon theories are stable under quantum corrections thanks to the non-renormalization theorem which is not due to the symmetry unlike the misconceptions claimed in the literature. We consider different covariant couplings of this Galileon scalar field with the matter field: the conformal coupling, the disformal coupling and the longitudinal coupling. We compute the one-loop quantum corrections to the Galileon interactions from the coupling to the external matter fields. In all the considered cases of covariant couplings we show that the terms generated by one-loop matter corrections not only renormalize the Galileon interactions but also give rise to higher order derivative gh...

  19. moco: Fast Motion Correction for Calcium Imaging.

    Science.gov (United States)

    Dubbs, Alexander; Guevara, James; Yuste, Rafael

    2016-01-01

    Motion correction is the first step in a pipeline of algorithms to analyze calcium imaging videos and extract biologically relevant information, for example the network structure of the neurons therein. Fast motion correction is especially critical for closed-loop activity triggered stimulation experiments, where accurate detection and targeting of specific cells in necessary. We introduce a novel motion-correction algorithm which uses a Fourier-transform approach, and a combination of judicious downsampling and the accelerated computation of many L 2 norms using dynamic programming and two-dimensional, fft-accelerated convolutions, to enhance its efficiency. Its accuracy is comparable to that of established community-used algorithms, and it is more stable to large translational motions. It is programmed in Java and is compatible with ImageJ.

  20. Dancoff Correction in Square and Hexagonal Lattices

    Energy Technology Data Exchange (ETDEWEB)

    Carlvik, I.

    1966-11-15

    This report presents the results of a series of calculations of Dancoff corrections for square and hexagonal rod lattices. The tables cover a wide range of volume ratios and moderator cross sections. The results were utilized for checking the approximative formula of Sauer and also the modification of Bonalumi to Sauer's formula. The modified formula calculates the Dancoff correction with an accuracy of 0.01 - 0.02 in cases of practical interest. Calculations have also been performed on square lattices with an empty gap surrounding the rods. The results demonstrate the error involved in treating this kind of geometry by means of homogenizing the gap and the moderator. The calculations were made on the Ferranti Mercury computer of AB Atomenergi before it was closed down. Since then FORTRAN routines for Dancoff corrections have been written, and a subroutine DASQHE is included in the report.