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Journal articles on the topic 'Prym map'

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Published: 9 March 2023

Last updated: 10 March 2023

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1

Colombo, Elisabetta, and Paola Frediani. "Prym map and second Gaussian map for Prym-canonical line bundles." Advances in Mathematics 239 (June 2013): 47–71. http://dx.doi.org/10.1016/j.aim.2013.02.009.

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2

Lange, Herbert, and Angela Ortega. "On the Prym map of cyclic coverings." Archiv der Mathematik 111, no. 6 (August 25, 2018): 621–31. http://dx.doi.org/10.1007/s00013-018-1242-5.

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3

Scognamillo, Renata. "Prym-Tjurin varieties and the Hitchin map." Mathematische Annalen 303, no. 1 (September 1995): 47–62. http://dx.doi.org/10.1007/bf01460978.

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4

Lange, Herbert, and Angela Ortega. "The Prym map of degree-7 cyclic coverings." Algebra & Number Theory 10, no. 4 (June 20, 2016): 771–801. http://dx.doi.org/10.2140/ant.2016.10.771.

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5

Naranjo, Juan-Carlos. "The positive-dimensional fibres of the Prym map." Pacific Journal of Mathematics 172, no. 1 (January 1, 1996): 223–26. http://dx.doi.org/10.2140/pjm.1996.172.223.

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6

Ortega, Angela. "The Prym Map: From Coverings to Abelian Varieties." Notices of the American Mathematical Society 67, no. 09 (October 1, 2020): 1. http://dx.doi.org/10.1090/noti2150.

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7

Colombo, Elisabetta, Paola Frediani, Alessandro Ghigi, and Matteo Penegini. "Shimura curves in the Prym locus." Communications in Contemporary Mathematics 21, no. 02 (February 27, 2019): 1850009. http://dx.doi.org/10.1142/s0219199718500098.

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We study Shimura curves of PEL type in [Formula: see text] generically contained in the Prym locus. We study both the unramified Prym locus, obtained using étale double covers, and the ramified Prym locus, corresponding to double covers ramified at two points. In both cases, we consider the family of all double covers compatible with a fixed group action on the base curve. We restrict to the case where the family is one-dimensional and the quotient of the base curve by the group is [Formula: see text]. We give a simple criterion for the image of these families under the Prym map to be a Shimura curve. Using computer algebra we check all the examples obtained in this way up to genus 28. We obtain 43 Shimura curves contained in the unramified Prym locus and 9 families contained in the ramified Prym locus. Most of these curves are not generically contained in the Jacobian locus.

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8

Ciliberto, Ciro, Thomas Dedieu, Concettina Galati, and Andreas Leopold Knutsen. "On the locus of Prym curves where the Prym-canonical map is not an embedding." Arkiv för Matematik 58, no. 1 (2020): 71–85. http://dx.doi.org/10.4310/arkiv.2020.v58.n1.a5.

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9

Marcucci, Valeria Ornella, and Gian Pietro Pirola. "Generic Torelli theorem for Prym varieties of ramified coverings." Compositio Mathematica 148, no. 4 (July 2012): 1147–70. http://dx.doi.org/10.1112/s0010437x12000280.

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AbstractWe consider the Prym map from the space of double coverings of a curve of genus gwithrbranch points to the moduli space of abelian varieties. We prove that 𝒫:ℛg,r→𝒜δg−1+r/2is generically injective ifWe also show that a very general Prym variety of dimension at least 4 is not isogenous to a Jacobian.

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10

LANGE, HERBERT, and ANGELA ORTEGA. "COMPACTIFICATION OF THE PRYM MAP FOR NON-CYCLIC TRIPLE COVERINGS." International Journal of Mathematics 24, no. 03 (March 2013): 1350015. http://dx.doi.org/10.1142/s0129167x13500158.

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According to [H. Lange and A. Ortega, Prym varieties of triple coverings, Int. Math. Res. Notices2011(22) (2011) 5045–5075], the Prym variety of any non-cyclic étale triple cover f : Y → X of a smooth curve X of genus 2 is a Jacobian variety of dimension 2. This gives a map from the moduli space of such covers to the moduli space of Jacobian varieties of dimension 2. We extend this map to a proper map Pr of a moduli space [Formula: see text] of admissible S3-covers of genus 7 to the moduli space [Formula: see text] of principally polarized abelian surfaces. The main result is that [Formula: see text] is finite surjective of degree 10.

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11

Verra, Alessandro. "The fibre of the Prym map in genus three." Mathematische Annalen 276, no. 3 (September 1987): 433–48. http://dx.doi.org/10.1007/bf01450840.

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12

Smith, Roy, and Robert Varley. "Infinitesimal study of a factorization of the Prym map." Annali di Matematica Pura ed Applicata (1923 -) 183, no. 3 (August 2004): 401–19. http://dx.doi.org/10.1007/s10231-003-0099-8.

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13

Barchielli, Caterina, and Paola Frediani. "On the first Gaussian map for Prym-canonical line bundles." Geometriae Dedicata 170, no. 1 (June 20, 2013): 289–302. http://dx.doi.org/10.1007/s10711-013-9881-y.

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14

Naranjo, Juan Carlos, and Angela Ortega. "Generic injectivity of the Prym map for double ramified coverings." Transactions of the American Mathematical Society 371, no. 5 (August 8, 2018): 3627–46. http://dx.doi.org/10.1090/tran/7459.

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15

Alexeev, Valery, Ron Donagi, Gavril Farkas, Elham Izadi, and Angela Ortega. "The uniformization of the moduli space of principally polarized abelian 6-folds." Journal für die reine und angewandte Mathematik (Crelles Journal) 2020, no. 761 (April 1, 2020): 163–217. http://dx.doi.org/10.1515/crelle-2018-0005.

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AbstractStarting from a beautiful idea of Kanev, we construct a uniformization of the moduli space \mathcal{A}_{6} of principally polarized abelian 6-folds in terms of curves and monodromy data. We show that the general principally polarized abelian variety of dimension 6 is a Prym–Tyurin variety corresponding to a degree 27 cover of the projective line having monodromy the Weyl group of the E_{6} lattice. Along the way, we establish numerous facts concerning the geometry of the Hurwitz space of such E_{6}-covers, including: (1) a proof that the canonical class of the Hurwitz space is big, (2) a concrete geometric description of the Hodge–Hurwitz eigenbundles with respect to the Kanev correspondence and (3) a description of the ramification divisor of the Prym–Tyurin map from the Hurwitz space to \mathcal{A}_{6} in the terms of syzygies of the Abel–Prym–Tyurin curve.

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16

Vologodsky, Vitaly. "On fibers of the toric resolution of the extended Prym map." Proceedings of the American Mathematical Society 132, no. 11 (June 2, 2004): 3159–65. http://dx.doi.org/10.1090/s0002-9939-04-07464-7.

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17

Agostini, Daniele. "On the Prym map for cyclic covers of genus two curves." Journal of Pure and Applied Algebra 224, no. 10 (October 2020): 106384. http://dx.doi.org/10.1016/j.jpaa.2020.106384.

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18

Koike, Kenji. "Algebraicity of some Weil Hodge Classes." Canadian Mathematical Bulletin 47, no. 4 (December 1, 2004): 566–72. http://dx.doi.org/10.4153/cmb-2004-055-x.

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AbstractWe show that the Prym map for 4-th cyclic étale covers of curves of genus 4 is a dominant morphism to a Shimura variety for a family of Abelian 6-folds of Weil type. According to the result of Schoen, this implies algebraicity of Weil classes for this family.

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19

Casalaina-Martin, Sebastian, Samuel Grushevsky, Klaus Hulek, and Radu Laza. "Extending the Prym map to toroidal compactifications of the moduli space of abelian varieties (with an appendix by Mathieu Dutour Sikirić)." Journal of the European Mathematical Society 19, no. 3 (2017): 659–723. http://dx.doi.org/10.4171/jems/678.

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20

LAZAR, ALDO J. "The space of ideals in the minimal tensor product of C*-algebras." Mathematical Proceedings of the Cambridge Philosophical Society 148, no. 2 (January 15, 2010): 243–52. http://dx.doi.org/10.1017/s0305004109990351.

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AbstractFor C*-algebras A1, A2 the map (I1, I2) → ker(qI1 ⊗ qI2) from Id′(A1) × Id′(A2) into Id′(A1 ⊗minA2) is a homeomorphism onto its image which is dense in the range. Here, for a C*-algebra A, the space of all proper closed two sided ideals endowed with an adequate topology is denoted Id′(A) and qI is the quotient map of A onto A/I. This result is used to show that any continuous function on Prim(A1) × Prim(A2) with values into a T1 topological space can be extended to Prim(A1 ⊗minA2). This enlarges the scope of [7, corollary 3·5] that dealt only with scalar valued functions. A new proof for a result of Archbold [3] about the space of minimal primal ideals of A1 ⊗minA2 is obtained also by using the homeomorphism mentioned above. New proofs of the equivalence of the property (F) of Tomiyama for A1 ⊗minA2 with certain other properties are presented.

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21

Jameson, G. J. O. "The incomplete gamma functions." Mathematical Gazette 100, no. 548 (June 14, 2016): 298–306. http://dx.doi.org/10.1017/mag.2016.67.

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Recall the integral definition of the gamma function: for a > 0. By splitting this integral at a point x ⩾ 0, we obtain the two incomplete gamma functions:(1)(2)Γ(a, x)is sometimes called the complementary incomplete gamma function. These functions were first investigated by Prym in 1877, and Γ(a, x) has also been called Prym's function. Not many books give these functions much space. Massive compilations of results about them can be seen stated without proof in [1, chapter 9] and [2, chapter 8]. Here we offer a small selection of these results, with proofs and some discussion of context. We hope to convince some readers that the functions are interesting enough to merit attention in their own right.

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22

Berdyugina, S. V., H. Korhonen, C. Schrijvers, and J. H. Telting. "Mapping the Non-Radial Pulsations." International Astronomical Union Colloquium 175 (2000): 268–71. http://dx.doi.org/10.1017/s0252921100055986.

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AbstractWe apply the surface imaging technique to high-resolution spectra of the rapidly rotating β Cep-type star ω1 Sco. Assuming only temperature fluctuations due to pulsations, we obtain a map of the surface corotating with the dominant pulsation mode. Prom the map we identify the dominant mode and find traces of a second pulsation mode. We conclude that the traditional surface imaging technique can be successfully used for mapping stellar non-radial pulsations.

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23

Regardt, Malin, Pari Basharat, Lisa Christopher-Stine, Catherine Sarver, Anita Björn, Ingrid E. Lundberg, Yeong Wook Song, Clifton O. Bingham, and Helene Alexanderson. "Patients’ Experience of Myositis and Further Validation of a Myositis-specific Patient Reported Outcome Measure — Establishing Core Domains and Expanding Patient Input on Clinical Assessment in Myositis. Report from OMERACT 12." Journal of Rheumatology 42, no. 12 (May 1, 2015): 2492–95. http://dx.doi.org/10.3899/jrheum.141243.

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Objective.The Outcome Measures in Rheumatology (OMERACT) myositis working group was established to examine patient-reported outcomes (PRO) as well as to validate patient-reported outcome measures (PROM) in myositis.Methods.Qualitative studies using focus group interviews and cognitive debriefing of the myositis-specific Myositis Activities Profile (MAP) were used to explore the experience of adults living with polymyositis (PM) and dermatomyositis (DM).Results.Preliminary results underscore the importance of patient input in the development of PROM to ensure content validity. Results from multicenter focus groups indicate the range of symptoms experienced including pain, fatigue, and impaired cognitive function, which are not currently assessed in myositis. Preliminary cognitive debriefing of the MAP indicated that while content was deemed relevant and important, several activities were not included; and that questionnaire construction and wording may benefit from revision. A research agenda was developed to continue work toward optimizing PRO assessment in myositis with 2 work streams. The first would continue to conduct and analyze focus groups until saturation in the thematic analysis was achieved to develop a framework that encompassed the patient-relevant aspects of myositis. The second would continue cognitive debriefing of the MAP to identify potential areas for revision. There was agreement that further work would be needed for inclusion body myositis and juvenile dermatomyositis, and that the inclusion of additional contributors such as caregivers and individuals from the pharmaceutical/regulatory spheres would be desirable.Conclusions.The currently used PROM do not assess symptoms or the effects of disease that are most important to patients; this emphasizes the necessity of patient involvement. Our work provides concrete examples for PRO identification.

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24

Hugo, Daniel. "Die man wat vlug vir die Nobel Prys." South African Theatre Journal 11, no. 1 (January 1997): 286–88. http://dx.doi.org/10.1080/10137548.1997.9688211.

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25

Yeasmin, Most Sabina, M. Jalal Uddin, Rajat Sanker Roy Biswas, Azwad Azdar, Shahanara Chowdhury, and Nishat Anjum Nourin. "Risk Factors of Premature Rupture of Membrane in A Tertiary Care Hospital, Bangladesh." Chattagram Maa-O-Shishu Hospital Medical College Journal 19, no. 2 (November 1, 2020): 5–8. http://dx.doi.org/10.3329/cmoshmcj.v19i2.50014.

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Background : Premature Rupture of Membrane (PROM) is one of the most common complication of pregnancy. A woman with premature rupture of membrane is at risk of perinatal morbidity and mortality and also associated with maternal morbidity and psychological stress. Objective of this study was to determine incidence and risk factors of pregnant woman with PROM admitted in a tertiary hospital at Chattogram, Bangladesh. Materials and methods : This prospective observational study conducted in the Department of Obstetrics and Gynaecology at Chattogram Maa-O-Shishu Hospital Medical College (CMOSHMC) Chattogram from 1stJanuary 2018 to 31st December 2018. In this period total admitted antenatal patients were 8117. Among the pregnant patients with PROM were 665 and their weeks of gestation were > 28 weeks. Data was collected by interviewer with semi structured questionnaire & check list. Results : Incidence of PROM was 8.2%. PROM was found to be frequent (53%) in younger age group between 20-24 years. It was also commonly in primigravida (61.8%). Term PROM was higher (69.2%) than pre-term PROM (30.8%). 93.3% were singleton pregnancies, 6.4% were twins and .3% were triplets. Analysis of risk factors revealed ectiology was unknown in 46 (6.8%) low socioeconomic condition (60.6%), anaemia (45 %), lower genital tract infection (35.6%) UTI (31%) previous history of PROM (27.9%) malpresentation (15%) multiple pregnancy (6.7%) polyhydramnios (6%) history of recent coitus (12%) DM and GDM (10.5%) were commonly associated with PROM. Conclusions : Early identification of various risk factors causing PROM and their management can prevent premature deliveries and its complications to some extent as well as serious maternal complication like Chorioamnionitis. Chatt Maa Shi Hosp Med Coll J; Vol.19 (2); July 2020; Page 5-8

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26

Chiba, Yasuyoshi, Manabu Kinoshita, Yoshiko Okita, Akihiro Tsuboi, Kayako Isohashi, Naoki Kagawa, Yasunori Fujimoto, et al. "Use of 11C-methionine PET parametric response map for monitoring WT1 immunotherapy response in recurrent malignant glioma." Journal of Neurosurgery 116, no. 4 (April 2012): 835–42. http://dx.doi.org/10.3171/2011.12.jns111255.

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Object Immunotherapy targeting the Wilms tumor 1 (WT1) gene product is a promising treatment modality for patients with malignant gliomas, and there have been reports of encouraging results. It has become clear, however, that Gd-enhanced MR imaging does not reflect prognosis, thereby necessitating a more robust imaging evaluation system for monitoring response to WT1 immunotherapy. To meet this demand, the authors performed a voxel-wise parametric response map (PRM) analysis of 11C-methionine PET (MET-PET) in WT1 immunotherapy and compared the data with the overall survival after initiation of WT1 immunotherapy (OSWT1). Methods Fourteen patients with recurrent malignant glioma were included in the study, and OSWT1 was compared with: 1) volume and length change in the contrast area of the tumor on Gd-enhanced MR images; 2) change in maximum uptake of 11C-methionine; and 3) a more detailed voxel-wise PRM analysis of MET-PET pre- and post-WT1 immunotherapy. Results The PRM analysis was able to identify the following 3 areas within the tumor core: 1) area with no change in 11C-methionine uptake pre- and posttreatment; 2) area with increased 11C-methionine uptake posttreatment (PRM+MET); and 3) area with decreased 11C-methionine uptake posttreatment. While the results of Gd-enhanced MR imaging volumetric and conventional MET-PET analysis did not correlate with OSWT1 (p = 0.270 for Gd-enhanced MR imaging length, p = 0.960 for Gd-enhanced MR imaging volume, and p = 0.110 for MET-PET), the percentage of PRM+MET area showed excellent correlation (p = 0.008) with OSWT1. Conclusions This study describes the limited value of Gd-enhanced MR imaging and highlights the potential of voxel-wise PRM analysis of MET-PET for monitoring treatment response in immunotherapy for malignant gliomas. Clinical trial registration no.: UMIN000002001.

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27

Gallegos, Claudio A., and Hernán R. Henríquez. "Fixed points of multivalued maps under local Lipschitz conditions and applications." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 150, no. 3 (January 29, 2019): 1467–94. http://dx.doi.org/10.1017/prm.2018.151.

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AbstractIn this work we are concerned with the existence of fixed points for multivalued maps defined on Banach spaces. Using the Banach spaces scale concept, we establish the existence of a fixed point of a multivalued map in a vector subspace where the map is only locally Lipschitz continuous. We apply our results to the existence of mild solutions and asymptotically almost periodic solutions of an abstract Cauchy problem governed by a first-order differential inclusion. Our results are obtained by using fixed point theory for the measure of noncompactness.

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28

Shvalb, Nir, Boaz Ben Moshe, and Oded Medina. "A real-time motion planning algorithm for a hyper-redundant set of mechanisms." Robotica 31, no. 8 (June 11, 2013): 1327–35. http://dx.doi.org/10.1017/s0263574713000489.

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SUMMARYWe introduce a novel probabilistic algorithm (CPRM) for real-time motion planning in the configuration space${\EuScript C}$. Our algorithm differs from a probabilistic road map (PRM) algorithm in the motion between a pair of anchoring points (local planner) which takes place on the boundary of the obstacle subspace${\EuScript O}$. We define a varying potential fieldfon ∂${\EuScript O}$as a Morse function and follow$\vec{\nabla} f$. We then exemplify our algorithm on a redundant worm climbing robot withndegrees of freedom and compare our algorithm running results with those of the PRM.

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29

Marchese, Andrea. "Residually many BV homeomorphisms map a null set onto a set of full measure." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 149, no. 04 (December 27, 2018): 1047–59. http://dx.doi.org/10.1017/prm.2018.104.

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AbstractLet Q be the open unit square in ℝ2. We prove that in a natural complete metric space of BV homeomorphisms f : Q → Q with f|∂Q = Id, residually many homeomorphisms (in the sense of Baire categories) map a null set onto a set of full measure, and vice versa. Moreover, we observe that for 1 ⩽ p < 2, the family of W1,p homemomorphisms satisfying the above property is of the first category.

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30

Huang, Hua-Lin, Zheyan Wan, and Yu Ye. "EXPLICIT cocycle formulas on finite abelian groups with applications to braided linear Gr-categories and Dijkgraaf–Witten invariants." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 150, no. 4 (March 13, 2019): 1937–64. http://dx.doi.org/10.1017/prm.2019.15.

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AbstractWe provide explicit and unified formulas for the cocycles of all degrees on the normalized bar resolutions of finite abelian groups. This is achieved by constructing a chain map from the normalized bar resolution to a Koszul-like resolution for any given finite abelian group. With a help of the obtained cocycle formulas, we determine all the braided linear Gr-categories and compute the Dijkgraaf–Witten Invariants of the n-torus for all n.

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31

Chao, Day-Yu, Jedhan Ucat Galula, Wen-Fan Shen, Brent S. Davis, and Gwong-Jen J. Chang. "Nonstructural Protein 1-Specific Immunoglobulin M and G Antibody Capture Enzyme-Linked Immunosorbent Assays in Diagnosis of Flaviviral Infections in Humans." Journal of Clinical Microbiology 53, no. 2 (December 10, 2014): 557–66. http://dx.doi.org/10.1128/jcm.02735-14.

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IgM antibody- and IgG antibody-capture enzyme-linked immunosorbent assays (MAC/GAC-ELISAs) targeted at envelope protein (E) of dengue viruses (DENV), West Nile virus, and Japanese encephalitis virus (JEV) are widely used as serodiagnostic tests for presumptive confirmation of viral infection. Antibodies directed against the flavivirus nonstructural protein 1 (NS1) have been proposed as serological markers of natural infections among vaccinated populations. The aim of the current study is to optimize an IgM and IgG antibody-capture ELISA (MAC/GAC-ELISA) to detect anti-NS1 antibodies and compare it with anti-E MAC/GAC-ELISA. Plasmids to express premembrane/envelope (prM/E) or NS1 proteins of six medically important flaviviruses, including dengue viruses (DENV-1 to DENV-4), West Nile virus (WNV), and Japanese encephalitis virus (JEV), were constructed. These plasmids were used for the production of prM/E-containing virus-like particles (VLPs) and secreted NS1 (sNS1) from COS-1 cells. Archived clinical specimens from patients with confirmed DENV, JEV, and WNV infections, along with naive sera, were subjected to NS1-MAC/GAC-ELISAs before or after depletion of anti-prM/E antibodies by preabsorption with or without VLPs. Human serum specimens from previously confirmed DENV infections showed significantly enhanced positive-to-negative (P/N) ratios for NS1-MAC/GAC-ELISAs after the depletion of anti-prM/E antibodies. No statistical differences in sensitivities and specificities were found between the newly developed NS1- and VLP-MAC/GAC-ELISAs. Further application of the assays to WNV- and JEV-infected serum panels showed similar results. A novel approach to perform MAC/GAC-ELISAs for NS1 antibody detection was successfully developed with great potential to differentiate antibodies elicited by the tetravalent chimeric yellow fever-17D/dengue vaccine or DENV infection.

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32

M. G., Mohanan, and Salgaonkar Ambuja. "Robotic Mushroom Harvesting by Employing Probabilistic Road Map and Inverse Kinematics." BOHR International Journal of Internet of things, Artificial Intelligence and Machine Learning 1, no. 1 (2021): 1–10. http://dx.doi.org/10.54646/bijiam.001.

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A collision-free path to a destination position in a random farm is determined using a probabilistic roadmap (PRM) that can manage static and dynamic obstacles. The position of ripening mushrooms is a result of picture processing. A mushroom harvesting robot is explored that uses inverse kinematics (IK) at the target position to compute the state of a robotic hand for grasping a ripening mushroom and plucking it. The Denavit-Hartenberg approach was used to create a kinematic model of a two-finger dexterous hand with three degrees of freedom for mushroom picking. Unlike prior experiments in mushroom harvesting, mushrooms are not planted in a grid or design, but are randomly scattered. At any point throughout the harvesting process, no human interaction is necessary.

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33

Guo, Li-Ping, Hong Huo, Xiao-Lei Wang, Zhi-Gao Bu, and Rong-Hong Hua. "Generation and Characterization of a Monoclonal Antibody Against prM Protein of West Nile Virus." Monoclonal Antibodies in Immunodiagnosis and Immunotherapy 33, no. 6 (December 2014): 438–43. http://dx.doi.org/10.1089/mab.2014.0047.

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34

Donagemma, Guilherme Kangussú, Hugo Alberto Ruiz, Víctor Hugo Alvarez V., João Carlos Ker, and Maurício Paulo Ferreira Fontes. "Fósforo remanescente em argila e silte retirados de Latossolos após pré-tratamentos na análise textural." Revista Brasileira de Ciência do Solo 32, no. 4 (August 2008): 1785–91. http://dx.doi.org/10.1590/s0100-06832008000400043.

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Alguns Latossolos podem apresentar problemas de dispersão, devido a grupamentos de microagregados de alta estabilidade. Esses grupamentos, muito argilosos, são parcialmente desagregados pela dispersão química e mecânica, contribuindo, pelo seu tamanho, para superestimar a proporção de silte do solo analisado. Para reduzir a proporção de pseudo-componentes aplicam-se pré-tratamentos, cuja eficiência pode ser testada pela capacidade de retenção de fosfatos. Assim, realizou-se um ensaio em laboratório com objetivo de verificar o uso da determinação do fósforo remanescente (Prem) como medida da eficiência de pré-tratamentos na análise textural de Latossolos. Os tratamentos corresponderam a um arranjo fatorial 7 x 2², num delineamento em blocos casualizados, com quatro repetições. Os fatores em estudo foram as amostras de sete Latossolos dispersos com NaOH 0,1 mol L-1, sem e com (2²) pré-tratamentos para a remoção da matéria orgânica (-MO) e dos óxidos de Fe e Al mal cristalizados (-Ox). Determinou-se o Prem em amostras da fração argila e silte dispersas uma vez e da fração silte dispersa uma segunda vez. A determinação do Prem é eficiente em mostrar diferenças entre os tratamentos aplicados, evidenciando alterações na capacidade de retenção de fosfatos, que foi incrementada no tratamento -MO, por maior exposição de componentes inorgânicos, e reduzida no tratamento -Ox, por diminuir a proporção de óxidos mal cristalizados.

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35

Bruce, J. W., and F. Tari. "Frame and direction mappings for surfaces in ℝ3." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 149, no. 03 (January 26, 2019): 795–830. http://dx.doi.org/10.1017/prm.2018.42.

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AbstractWe study frames in ℝ3 and mapping from a surface M in ℝ3 to the space of frames. We consider in detail mapping frames determined by a unit tangent principal or asymptotic direction field U and the normal field N. We obtain their generic local singularities as well as the generic singularities of the direction field itself. We show, for instance, that the cross-cap singularities of the principal frame map occur precisely at the intersection points of the parabolic and subparabilic curves of different colours. We study the images of the asymptotic and principal foliations on the unit sphere by their associated unit direction fields. We show that these curves are solutions of certain first order differential equations and point out a duality in the unit sphere between some of their configurations.

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36

Cheng, Shiwei, Baozhu Li, Le Sun, and Yuwen Chen. "HRRNet: Hierarchical Refinement Residual Network for Semantic Segmentation of Remote Sensing Images." Remote Sensing 15, no. 5 (February 23, 2023): 1244. http://dx.doi.org/10.3390/rs15051244.

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Semantic segmentation of high-resolution remote sensing images plays an important role in many practical applications, including precision agriculture and natural disaster assessment. With the emergence of a large number of studies on convolutional neural networks, the performance of the semantic segmentation model of remote sensing images has been dramatically promoted. However, many deep convolutional network models do not fully refine the segmentation result maps, and, in addition, the contextual dependencies of the semantic feature map have not been adequately exploited. This article proposes a hierarchical refinement residual network (HRRNet) to address these issues. The HRRNet mainly consists of ResNet50 as the backbone, attention blocks, and decoders. The attention block consists of a channel attention module (CAM) and a pooling residual attention module (PRAM) and residual structures. Specifically, the feature map output by the four blocks of Resnet50 is passed through the attention block to fully explore the contextual dependencies of the position and channel of the semantic feature map, and, then, the feature maps of each branch are fused step by step to realize the refinement of the feature maps, thereby improving the segmentation performance of the proposed HRRNet. Experiments show that the proposed HRRNet improves segmentation result maps compared with various state-of-the-art networks on Vaihingen and Potsdam datasets.

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Marrakchi, Amine. "Fullness of crossed products of factors by discrete groups." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 150, no. 5 (April 23, 2019): 2368–78. http://dx.doi.org/10.1017/prm.2019.21.

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AbstractLet M be an arbitrary factor and $\sigma : \Gamma \curvearrowright M$ an action of a discrete group. In this paper, we study the fullness of the crossed product $M \rtimes _\sigma \Gamma $. When Γ is amenable, we obtain a complete characterization: the crossed product factor $M \rtimes _\sigma \Gamma $ is full if and only if M is full and the quotient map $\overline {\sigma } : \Gamma \rightarrow {\rm out}(M)$ has finite kernel and discrete image. This answers the question of Jones from [11]. When M is full and Γ is arbitrary, we give a sufficient condition for $M \rtimes _\sigma \Gamma $ to be full which generalizes both Jones' criterion and Choda's criterion. In particular, we show that if M is any full factor (possibly of type III) and Γ is a non-inner amenable group, then the crossed product $M \rtimes _\sigma \Gamma $ is full.

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Barański, Krzysztof, Núria Fagella, Xavier Jarque, and Bogusława Karpińska. "Fatou components and singularities of meromorphic functions." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 150, no. 2 (January 23, 2019): 633–54. http://dx.doi.org/10.1017/prm.2018.142.

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AbstractWe prove several results concerning the relative position of points in the postsingular set P(f) of a meromorphic map f and the boundary of a Baker domain or the successive iterates of a wandering component. For Baker domains we answer a question of Mihaljević-Brandt and Rempe-Gillen. For wandering domains we show that if the iterates Un of such a domain have uniformly bounded diameter, then there exists a sequence of postsingular values pn such that ${\rm dist} (p_n, U_n)\to 0$ as $n\to \infty $. We also prove that if $U_n \cap P(f)=\emptyset $ and the postsingular set of f lies at a positive distance from the Julia set (in ℂ), then the sequence of iterates of any wandering domain must contain arbitrarily large disks. This allows to exclude the existence of wandering domains for some meromorphic maps with infinitely many poles and unbounded set of singular values.

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Tsien, Christina, Craig J. Galbán, Thomas L. Chenevert, Timothy D. Johnson, Daniel A. Hamstra, Pia C. Sundgren, Larry Junck, et al. "Parametric Response Map As an Imaging Biomarker to Distinguish Progression From Pseudoprogression in High-Grade Glioma." Journal of Clinical Oncology 28, no. 13 (May 1, 2010): 2293–99. http://dx.doi.org/10.1200/jco.2009.25.3971.

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Purpose To assess whether a new method of quantifying therapy-associated hemodynamic alterations may help to distinguish pseudoprogression from true progression in patients with high-grade glioma. Patients and Methods Patients with high-grade glioma received concurrent chemoradiotherapy. Relative cerebral blood volume (rCBV) and blood flow (rCBF) maps were acquired before chemoradiotherapy and at week 3 during treatment on a prospective institutional review board–approved study. Pseudoprogression was defined as imaging changes 1 to 3 months after chemoradiotherapy that mimic tumor progression but stabilized or improved without change in treatment or for which resection revealed radiation effects only. Clinical and conventional magnetic resonance (MR) parameters, including average percent change of rCBV and CBF, were evaluated as potential predictors of pseudoprogression. Parametric response map (PRM), an innovative, voxel-by-voxel method of image analysis, was also performed. Results Median radiation dose was 72 Gy (range, 60 to 78 Gy). Of 27 patients, stable disease/partial response was noted in 13 patients and apparent progression was noted in 14 patients. Adjuvant temozolomide was continued in all patients. Pseudoprogression occurred in six patients. Based on PRM analysis, a significantly reduced blood volume (PRMrCBV) at week 3 was noted in patients with progressive disease as compared with those with pseudoprogression (P < .01). In contrast, change in average percent rCBV or rCBF, MR tumor volume changes, age, extent of resection, and Radiation Therapy Oncology Group recursive partitioning analysis classification did not distinguish progression from pseudoprogression. Conclusion PRMrCBV at week 3 during chemoradiotherapy is a potential early imaging biomarker of response that may be helpful in distinguishing pseudoprogression from true progression in patients with high-grade glioma.

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He, Rui, Anaïck Moisan, Olivier Detante, Chantal Rémy, Alexandre Krainik, Emmanuel Luc Barbier, and Benjamin Lemasson. "Evaluation of Parametric Response Mapping to Assess Therapeutic Response to Human Mesenchymal Stem Cells after Experimental Stroke." Cell Transplantation 26, no. 8 (August 2017): 1462–71. http://dx.doi.org/10.1177/0963689717721211.

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Stroke is the leading cause of disability in adults. After the very narrow time frame during which treatment by thrombolysis and mechanical thrombectomy is possible, cell therapy has huge potential for enhancing stroke recovery. Accurate analysis of the response to new therapy using imaging biomarkers is needed to assess therapeutic efficacy. The aim of this study was to compare 2 analysis techniques: the parametric response map (PRM), a voxel-based technique, and the standard whole-lesion approach. These 2 analyses were performed on data collected at 4 time points in a transient middle cerebral artery occlusion (MCAo) model, which was treated with human mesenchymal stem cells (hMSCs). The apparent diffusion coefficient (ADC), cerebral blood volume (CBV), and vessel size index (VSI) were mapped using magnetic resonance imaging (MRI). Two groups of rats received an intravenous injection of either 1 mL phosphate-buffered saline (PBS)-glutamine (MCAo-PBS, n = 10) or 3 million hMSCs (MCAo-hMSC, n = 10). One sham group was given PBS-glutamine (sham, n = 12). Each MRI parameter was analyzed by both the PRM and the whole-lesion approach. At day 9, 1 d after grafting, PRM revealed that hMSCs had reduced the fraction of decreased ADC (PRMADC−: MCAo-PBS 6.7% ± 1.7% vs. MCAo-hMSC 3.3% ± 2.4%), abolished the fraction of increased CBV (PRMCBV+: MCAo-PBS 16.1% ± 3.7% vs. MCAo-hMSC 6.4% ± 2.6%), and delayed the fraction of increased VSI (PRMVSI+: MCAo-PBS 17.5% ± 6.3% vs. MCAo-hMSC 5.4% ± 2.6%). The whole-lesion approach was, however, insensitive to these early modifications. PRM thus appears to be a promising technique for the detection of early brain changes following treatments such as cell therapy.

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Bevan, Jonathan J., and Sandra Käbisch. "Twists and shear maps in nonlinear elasticity: explicit solutions and vanishing Jacobians." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 150, no. 1 (January 23, 2019): 41–71. http://dx.doi.org/10.1017/prm.2018.90.

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AbstractIn this paper we study constrained variational problems that are principally motivated by nonlinear elasticity theory. We examine, in particular, the relationship between the positivity of the Jacobian det ∇u and the uniqueness and regularity of energy minimizers u that are either twist maps or shear maps. We exhibit explicit twist maps, defined on two-dimensional annuli, that are stationary points of an appropriate energy functional and whose Jacobian vanishes on a set of positive measure in the annulus. Within the class of shear maps we precisely characterize the unique global energy minimizer $u_{\sigma }: \Omega \to {\open R}^2$ in a model, two-dimensional case. We exploit the Jacobian constraint $\det \nabla u_{\sigma} \gt 0$ a.e. to obtain regularity results that apply ‘up to the boundary’ of domains with corners. It is shown that the unique shear map minimizer has the properties that (i) $\det \nabla u_{\sigma }$ is strictly positive on one part of the domain Ω, (ii) $\det \nabla u_{\sigma } = 0$ necessarily holds on the rest of Ω, and (iii) properties (i) and (ii) combine to ensure that $\nabla u_{\sigma }$ is not continuous on the whole domain.

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Negrean, Laurențiu Vasile, and Sergiu Bogdan. "Contrabanda asimilată [art. 270 alin. (3) din Legea nr. 86/2006] – continuitatea discontinuității unei incriminări." Criminal Law Writings (Caiete de Drept Penal), no. 3 (January 20, 2023): 9–30. http://dx.doi.org/10.24193/cdp.2022.3.1.

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Prezentul studiu își propune să aducă în prim-plan o analiză a efectelor Deciziei nr. 176/2022 a Curții Constituționale a României din perspectiva dezincriminării infracțiunii de contrabandă asimilată. Luând în considerare problemele de drept apărute în practica judiciară ulterior deciziei amintite mai sus, prezentul studiu va analiza problematica continuității incriminării faptei prin raportare în special la textul prevăzut de art. 452 alin. (1) lit. h) din Codul fiscal.

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Han, Ding, Ya-Guang Liu, Shou-Dong Pan, Yi Luo, Jia Li, and Chuan Ou-Yang. "Comparison by Real-Time Hemodynamic and Cardiac Efficiency Monitoring of Sufentanil-Midazolam and Sevoflurane for Anesthesia Induction in Children Undergoing Cardiac Surgery: A Prospective Randomized Study." Heart Surgery Forum 22, no. 1 (February 18, 2019): E038—E044. http://dx.doi.org/10.1532/hsf.2037.

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Background: Intravenous sufentanil-midazolam and inhalational sevoflurane are widely used for anesthetic induction in children undergoing cardiac surgery. However, knowledge about their effects on hemodynamics and cardiac efficiency remains limited due largely to the lack of direct monitoring method. We used a minimally invasive technique, the pressure recording analytical method (PRAM), to directly monitor hemodynamics and cardiac efficiency, and compared the effects of the two anesthetic regimens in children undergoing ventricular septal defect repair. Methods: Forty-four children (2.3 ± 0.9 years) were randomized into two groups to receive either intravenous sufentanil (1 µg/kg) and midazolam (0.2 mg/kg) (Group SM) or 2.0 MAC sevoflurane (Group S) to complete induction after sedation was obtained with 2.0 MAC sevoflurane. Systemic hemodynamic data recorded by PRAM included heart rate (HR), systolic (SBP) and mean (MBP) blood pressure, stroke volume index (SVI), cardiac index (CI), systemic vascular resistance index (SVRI), the maximal slope of systolic upstroke (dp/dtmax) and cardiac cycle efficiency (CCE) after sedation obtained; 1, 2, and 5 minutes after induction achieved; 1, 2, 5, and 10 minutes after intubation. Results: HR and SVRI showed a decrease in Group SM but an increase in Group S (Ptime*group < 0.0001) in the study period. SVI and CCE showed an increase in Group SM but a decrease in Group S (Ptime*group < 0.0001). SBP, MBP, and CI were related to time after polynomial transformation, showing an increase after intubation in Group SM but a decrease in Group S (Ptime2*group < 0.0001). Conclusion: PRAM provides meaningful and direct monitoring of hemodynamic parameters as well as cardiac efficiency during the dynamic period of anesthetic induction in children undergoing cardiac surgery. As compared to inhalational sevoflurane, intravenous sufentanil-midazolam exerts more favorable effects on systemic hemodynamics and cardiac efficiency during anesthetic induction in this group of patients.

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Peng, Minhua, Crystall Marie Dawn Swarbrick, Kitti Wing-Ki Chan, Dahai Luo, Wei Zhang, Xiaoping Lai, Geng Li, and Subhash G. Vasudevan. "Luteolin escape mutants of dengue virus map to prM and NS2B and reveal viral plasticity during maturation." Antiviral Research 154 (June 2018): 87–96. http://dx.doi.org/10.1016/j.antiviral.2018.04.013.

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Jang, Da-un, and Joo-sung Kim. "Development of Ship Route-Planning Algorithm Based on Rapidly-Exploring Random Tree (RRT*) Using Designated Space." Journal of Marine Science and Engineering 10, no. 12 (November 22, 2022): 1800. http://dx.doi.org/10.3390/jmse10121800.

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Ship route planning is a crucial activity that must consider not only the safety of the ship but also the safe passage of nearby ships in the same space and time. This study aims to provide general route-planning guidance to shipping traffic by improving conventional sampling-based route-planning algorithms in accordance with the maritime environment from a ship operator’s perspective. The obstacle safety margin in a marine environment can be reflected in a binary image map space based on an electronic navigational chart. Consequently, an initial route was created using the probabilistic road map (PRM) algorithm in the configured map space to increase the speed of the conventional sampling-based route-planning algorithm. Based on the initial route created, a designated space—that is, a multi-elliptical area—was created to limit the route-search range. After searching the final route in the designated space based on the rapidly-exploring random tree (RRT*) algorithm, optimal route planning could be achieved by generating a collision-free space graph to remove unnecessary nodes from the searched final route. The simulation results showed that the route was shortened by approximately 33.7 km compared with the conventional RRT* algorithm, and the calculation time was shortened by approximately 2.5 times.

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Hildebrandt, G., W. Schöneich, D. Lange, E. Želwanowa, and A. Hempelmann. "Short Time Light Variations of Ap-Stars." International Astronomical Union Colloquium 90 (1986): 189–90. http://dx.doi.org/10.1017/s025292110009148x.

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Prom 1973 till 1981 sixteen Ap stars were investigated regarding to short time light variations with the twin telescope of the Zentralinstitut für Astrophysik stationed at the observatory Shemahka of the Academy of Science of Aserbaidshan. Only five of these stars show significant varyations with characteristical times in the region of 0.5 to 5 houres and amplitudes of about 0.01 mag. We will present here a short discussion of these five stars.

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Maloof, J. N., J. Whangbo, J. M. Harris, G. D. Jongeward, and C. Kenyon. "A Wnt signaling pathway controls hox gene expression and neuroblast migration in C. elegans." Development 126, no. 1 (January 1, 1999): 37–49. http://dx.doi.org/10.1242/dev.126.1.37.

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The specification of body pattern along the anteroposterior (A/P) body axis is achieved largely by the actions of conserved clusters of Hox genes. Limiting expression of these genes to localized regional domains and controlling the precise patterns of expression within those domains is critically important for normal patterning. Here we report that egl-20, a C. elegans gene required to activate expression of the Hox gene mab-5 in the migratory neuroblast QL, encodes a member of the Wnt family of secreted glycoproteins. We have found that a second Wnt pathway gene, bar-1, which encodes a beta-catenin/Armadillo-like protein, is also required for activation of mab-5 expression in QL. In addition, we describe the gene pry-1, which is required to limit expression of the Hox genes lin-39, mab-5 and egl-5 to their correct local domains. We find that egl-20, pry-1 and bar-1 all function in a linear genetic pathway with conserved Wnt signaling components, suggesting that a conserved Wnt pathway activates expression of mab-5 in the migratory neuroblast QL. Moreover, we find that members of this Wnt signaling system play a major role in both the general and fine-scale control of Hox gene expression in other cell types along the A/P axis.

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Lor, Kuo-Lung, Yeun-Chung Chang, Chong-Jen Yu, Cheng-Yi Wang, and Chung-Ming Chen. "Bullous Parametric Response Map for Functional Localization of COPD." Journal of Digital Imaging 35, no. 2 (January 11, 2022): 115–26. http://dx.doi.org/10.1007/s10278-021-00561-z.

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AbstractAdvanced bronchoscopic lung volume reduction treatment (BLVR) is now a routine care option for treating patients with severe emphysema. Patterns of low attenuation clusters indicating emphysema and functional small airway disease (fSAD) on paired CT, which may provide additional insights to the target selection of the segmental or subsegmental lobe of the treatments, require further investigation. The low attenuation clusters (LACS) were segmented to identify the scalar and spatial distribution of the lung destructions, in terms of 10 fractions scales of low attenuation density (LAD) located in upper lobes and lower lobes. The LACs of functional small airway disease (fSAD) were delineated by applying the technique of parametric response map (PRM) on the co-registered CT image data. Both emphysematous LACs of inspiratory CT and fSAD LACs on expiratory CT were used to derive the coefficients of the predictive model for estimating the airflow limitation. The voxel-wise severity is then predicted using the regional LACs on the co-registered CT to indicate the functional localization, namely, the bullous parametric response map (BPRM). A total of 100 subjects, 88 patients with mild to very severe COPD and 12 control participants with normal lung functions (FEV1/FVC % > 70%), were evaluated. Pearson’s correlations between FEV1/FVC% and LAV%HU-950 of severe emphysema are − 0.55 comparing to − 0.67 and − 0.62 of LAV%HU-856 of air-trapping and LAV%fSAD respectively. Pearson’s correlation between FEV1/FVC% and FEV1/FVC% predicted by the proposed model using LAD% of HU-950 and fSAD on BPRM is 0.82 (p < 0.01). The result of the Bullous Parametric Response Map (BPRM) is capable of identifying the less functional area of the lung, where the BLVR treatment is aimed at removing from a hyperinflated area of emphysematous regions.

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Poudel, Sabitri, and Sangman Moh. "Hybrid Path Planning for Efficient Data Collection in UAV-Aided WSNs for Emergency Applications." Sensors 21, no. 8 (April 17, 2021): 2839. http://dx.doi.org/10.3390/s21082839.

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In unmanned aerial vehicle (UAV)-aided wireless sensor networks (UWSNs), a UAV is employed as a mobile sink to gather data from sensor nodes. Incorporating UAV helps prolong the network lifetime and avoid the energy-hole problem faced by sensor networks. In emergency applications, timely data collection from sensor nodes and transferal of the data to the base station (BS) is a prime requisite. The timely and safe path of UAV is one of the fundamental premises for effective UWSN operations. It is essential and challenging to identify a suitable path in an environment comprising various obstacles and to ensure that the path can efficiently reach the target point. This paper proposes a hybrid path planning (HPP) algorithm for efficient data collection by assuring the shortest collision-free path for UAV in emergency environments. In the proposed HPP scheme, the probabilistic roadmap (PRM) algorithm is used to design the shortest trajectory map and the optimized artificial bee colony (ABC) algorithm to improve different path constraints in a three-dimensional environment. Our simulation results show that the proposed HPP outperforms the PRM and conventional ABC schemes significantly in terms of flight time, energy consumption, convergence time, and flight path.

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Bryen, Diane Nelson. "Communication during times of natural or man-made emergencies." Journal of Pediatric Rehabilitation Medicine 2, no. 2 (2009): 123–29. http://dx.doi.org/10.3233/prm-2009-0075.

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