2,324 research outputs found
FINANCING COMMUNITY FACILITIES: A CASE STUDY OF THE PARKS AND RECREATIONAL GENERAL OBLIGATION BOND MEASURE OF SAN JOSE, CALIFORNIA
No full textThis study of the City of San Jose’s Parks and Recreation General Obligation (GO) Bond Measure seeks to identify the politics-, management-, and planning-related lessons learned by the City as it developed its community facilities using the GO bonds proceeds. The study finds that these lessons include: be conservative in what you promise the residents; be prepared for changes in economic environment by identifying supplementary funding sources should the primary source not yield adequate funds; make sure that the jurisdiction is organizationally capable of handling the increased workload; and prepare detailed project plans prior to the bond issuance.Community Infrastructure and Services; Municipal Bonds; Public Finance
Corrector results for a parabolic problem with a memory effect
No full textThe aim of this paper is to provide the correctors associated to the homogenization of a parabolic problem describing the heat
transfer. The results here complete the earlier study in [Jose, Rev. Roumaine Math. Pures Appl. 54 (2009) 189–222]
on the asymptotic behaviour of a problem in a domain with two components separated by an ε-periodic interface.
The physical model established in [Carslaw and Jaeger, The Clarendon Press, Oxford (1947)] prescribes on the interface the
condition that the flux of the temperature is proportional to the jump of the temperature field, by a factor of order
εγ.
We suppose that -1 < γ ≤ 1. As far as the energies of the homogenized problems are concerned, we consider the cases
-1 < γ < 1
and γ = 1 separately. To obtain the convergence of the energies, it is necessary to impose stronger assumptions on the data.
As seen
in [Jose, Rev. Roumaine Math. Pures Appl. 54 (2009) 189–222] and [Faella and Monsurrò, Topics on Mathematics for
Smart Systems, World Sci. Publ., Hackensack, USA (2007) 107–121] (also in [Donato et al., J. Math. Pures Appl.
87 (2007) 119–143]), the case γ = 1 is more interesting because of the presence of a memory effect
in the homogenized problem
Corrector results for a parabolic problem with a memory effect
No full textThe aim of this paper is to provide the correctors associated to the homogenization of a parabolic problem describing the heat transfer. The results here complete the earlier study in [Jose, Rev. Roumaine Math. Pures Appl. 54 (2009) 189.222] on the asymptotic behaviour of a problem in a domain with two components separated by an ε-periodic interface. The physical model established in [Carslaw and Jaeger, The Clarendon Press, Oxford (1947)] prescribes on the interface the condition that the flux of the temperature is proportional to the jump of the temperature field, by a factor of order εγ. We suppose that .1 \u3c γ ≤ 1. As far as the energies of the homogenized problems are concerned, we consider the cases -1 \u3c γ \u3c 1 and γ = 1 separately. To obtain the convergence of the energies, it is necessary to impose stronger assumptions on the data. As seen in [Jose, Rev. Roumaine Math. Pures Appl. 54 (2009) 189.222] and [Faella and Monsurrò, Topics on Mathematics for Smart Systems, World Sci. Publ., Hackensack, USA (2007) 107.121] (also in [Donato et al., J. Math. Pures Appl. 87 (2007) 119.143]), the case γ = 1 is more interesting because of the presence of a memory effect in the homogenized problem. © EDP Sciences, SMAI 2010
Approximate controllability of a parabolicsystem with imperfect interfaces
No full textIn this paper, the investigation of the asymptotic behavior of the approximate control for a parabolic equation with periodic rapidly oscillating coefficients depending on a parameter γ and modeling composites with interfacial resistance was completed. The approximate control and its asymptotic behavior as ε → 0 for the case −1 \u3c γ ≤ 1was done recently in Donato & Jose (2015). The remaining case γ ≤ −1 was considered. The corrector results for the latter case given in Yang (2014) play an important role when proving this result. Following an idea introduced by Lions (1991), the approximate control is constructed as the solutions of a related transposed problem having as final data the (unique) minimum point of a suitable functional. It was then demonstrated that the control and the corresponding solution of the periodic problem converge respectively to the control and to the solution of the homogenized problem. One of the main difficulties in this study was to find the appropriate limit functionals in order to obtain the convergence results. This study addressed the problem of homogenization in the context of controllability and vice-versa, showing the interplay of two approaches in the study of partial differential equations
Author Co-Citation Analysis (ACA): a powerful tool for representing implicit knowledge of scholar knowledge workers
No full textIn the last decade, knowledge has emerged as one of the most important and valuable organizational assets. Gradually this importance caused to emergence of new discipline entitled ―knowledge management‖. However one of the major challenges of knowledge management is conversion implicit or tacit knowledge to explicit knowledge. Thus Making knowledge visible so that it can be better accessed, discussed, valued or generally managed is a long-standing objective in knowledge management. Accordingly in this paper author co- citation analysis (ACA) will be proposed as an efficient technique of knowledge visualization in academia (Scholar knowledge workers)
Asymptotic behavior of the approximate controls for parabolic equations with interfacial contact resistance
No full textInternational audienc
Capulopsyche keralensis Unnikrishnan & Sobczyk & Jose & Jose 2023, sp. nov.
No full text<i>Capulopsyche keralensis</i> sp. nov. <p>(Figs. 1–10)</p> <p> <b>Type material.</b> <b>Holotype,</b> ♂ India, Kerala, Idukki, Nariyampara, 9.7424° N, 77.0939° E, 28.xi.2022, with larval case, leg. Usha A U (Fig. 1). Holotype will be deposited at the Zoological Survey of India Museum, Calicut, Kerala after submission of thesis of the first author and is at present at St. Thomas College, Thrissur.</p> <p> <b>Paratypes:</b> 2 ♀, (both with larval case) same data as holotype, 16.xii.2021, leg. Usha, A. U. (Fig. 2 a–b); 2♂ (both with larval case) same data as holotype, 30.xi.2022, leg. Usha, A. U.; additional 24 larval cases with pupal exuviae, same data as paratypes, leg. Usha, A. U.; 4 larval cases with pupal exuviae, Nelliyampathy, Palakkad, Kerala, 10.5013° N, 76.6768° E, 15.ii.2022, leg. Usha, A. U. (Figs. 2 a–b).</p> <p> <b>Diagnosis.</b> See the diagnosis for the genus.</p> <p> <b>Etymology.</b> The specific epithet <i>keralensis</i> is derived from the state of Kerala in India. The binomial <i>Capulopsyche keralensis</i> means ‘coffee psychid of Kerala’.</p> <p> <b>Description. Male</b>. Small-sized brownish black moth, wingspan 8–8.4 mm, body length 2.9 mm, forewing length 3.7mm including fringes, width 1.4 mm.</p> <p> <i>Head</i>. Vestiture yellowish brown, the base of the antennae thickly covered with dark yellowish-brown scales with bidentate apices. Antennae total length 1.7 mm, flagellomeres with 24 segments (Fig. 3). EI 1.13 mm.</p> <p> <i>Thorax</i>. Reddish brown, barely covered with scales on the dorsal side. Forewings covered with dark brown scales mixed with yellowish scales (Fig. 4). Scales broad (class 5–6), with 5-8 tips. The darker scales are mainly in the area of the front and outer margin and are partly arranged in irregular transverse bands. Fringes dark, wide, multi-pointed Hindwings dark greyish brown (Fig. 4), slightly lighter at the base. Width 1.4 mm, WI 2.6 mm. Wing venation as described for genus (Figs 5 a–b).</p> <p> <i>Abdomen</i>. Small, covered with blackish scales, length 1.6 mm.</p> <p> <i>Leg</i>. As described for the genus (Figs 6 a–c).</p> <p> <i>Genitalia</i>. Length 0.46 mm. Valva broad, curved inwardly, surmounting the posterior border of the tegumen, rounded distally, with numerous setae. Sacculus attached basally, ending in a strong curved spine. Phallus short, tubular, length 0.23 mm. (Fig. 7).</p> <p> <i>Female.</i> Length 2.5–3 mm. Body pale yellowish, around the abdomen loosely covered with very narrow, distally rounded brownish black scales. Eyes are very small, EI 2.3 mm. Legs short, reduced. Femur and tibia present, tarsi reduced to 2-3 segments, with two prominent claws, pale yellowish brown. Antenna short, filiform, 0.5 mm long, with 6-9 different scaled segments. The two basal segments are wider than the others. The distal end of the abdomen with long ovipositor, surrounded by an anal hair-tuft consisting of long golden-brown hairlike scales.</p> <p> <i>Larva</i>. (Fig. 8a and b) Body whitish cream, head distinctly sclerotized, first and second thoracic segment dark brown, strongly sclerotized dorsally, third thoracic segment more strongly sclerotized at the posterior margin. The abdominal segments were without sclerotized fields, the anal shield only slightly more sclerotized. Fully grown larva 4 mm in length.</p> <p> <i>Male and female pupal exuvia</i>. (Figs. 9 a–b) Dark golden-brown, male exuvia 3.0– 3.5mm in length and 1 mm in width, female exuvia 3.8–4.0 mm in length and 1.5 mm in width.</p> <p>A single row of spines dorsally on abdominal segments IV-VIII. The spines are directed backwards. Each row is comb-like and with numerous tiny hair-like spines. These spines probably serve to fix the pupa, and later to move it towards the exit and to hold it in place during emergence. In female pupae, the spines are shorter and reduced.</p> <p> <i>Larval case</i>. (Figs. 10 a–b) The larval case of this species is an elongated tube-like, wrapped with a sheath made up of bark tissues from the trees. An adult male case has a length of 12–13 mm, and the width of the outer sheath is 5–6 mm. Female case has a 15–16 mm length and 6–7 mm width, and the attached thread of each case is 7–9 mm long. Double-walled larval cases reported from Psychidae are the triangular larval cases of <i>Diplodoma</i> Zeller, 1852 which also hung up on threads. But in <i>Diplodoma</i>, the inner case has a distinctive triangular shape and is not visible from the outside. The outer case also has a triangular basic shape in cross-section.</p> <p> <b>Distribution.</b> Larval and pupal cases were collected from the coffee plantations of two localities from Kerala state, Nariyampara and Nelliyampathy of Idukki and Palakkad districts (Fig. 11) respectively. Pupal cases were seen hung on the twigs and und <i>er</i> side of leaves of the <i>Coffea arabica</i> plant (Fig. 12).Altitude at the sites of the collection was 960 m and 887 mASL. Both collection sites were situated inside private coffee plantations. The soil type of the region is described as ‘Clayey mixed ustic pale humults and rock land(very deep,well-drained,clayey soil on moderately steeply sloping high hills with thin vegetation, with moderate erosion, associated with rock outcrops and deep well-drained gravelly loam soils on gentle slopes) in Soil Maps of India (1996). In Nelliyampathy the summer temperature ranges from 20°C to 33°C and in winter15°C to28°C. In Nariyampara the average temperature is20°C.Summer temperatures range from 19°C to 29°C and winter temperatures are in the range of 15°C to 24°C. Average rainfall according to Centre for Earth Studies Resource Atlas of Kerala (1984) for South West Monsoon is 150 cm at Nariyampara and 250 cm at Nelliyampathy. For both sites, Northeast Monsoon was 40 cm and ‘Other rains’ was reported as 30–50 cm.</p> <p> <b>Biology.</b> The larvae of this species were found scraping on the bark of trees, they seem to feed on the bark tissues and depositions (algae) on the bark. The pupal cases are attached by a thread to the branches and underside of the leaves of plants (Fig. 12).</p> <p>The life span of an emerged male adult was up to 4 to 5 days. There are many eggs wrapped with silken cases were seen inside the female cases, and female adults lay eggs using their ovipositor inside the case after mating. Each yellow-coloured egg was found wrapped inside loosely spun silken cocoons. Eggs clustered together to form a group egg mass (Fig. 13) inside the sheath of the case. The larval case is made of silk and covered with bark tissues, and other substances present in the bark.</p> <p> <b>DNA barcode and phylogenetic analysis.</b> COI sequencing of the species collected from the two locations Nariyampara and Nelliyampathy was done and the sequences have 641 and 654 base pairs respectively. The sequences were uploaded in the NCBI GenBank with the accession numbers OP960232 and OP957497.</p> <p> The evolutionary relationship is depicted in the tree with the highest log likelihood (-3908,46) (Fig. 14). Based on the tree constructed using these two COI genes and other available species from GenBank and BOLD SYSTEMS, a hypothetical taxonomic unit representing a Taleporiinae ancestor splits into two branches with three genera <i>Bankesia</i>, <i>Pseudobankesia</i>, and <i>Taleporia</i> forming one group and <i>Sciopetris melitensis</i> forming the second group with <i>Capulopsyche keralensis</i> <b>gen. et sp. nov.</b>. The distance between <i>S. melitensis</i> and <i>Capulopsyche keralensis</i> <b>gen. et sp. nov.</b> indicates that they are two distinct species. In addition <i>S. melitensis</i> is a Mediterranean palaearctic species.</p>Published as part of <i>Unnikrishnan, Usha Ayyath, Sobczyk, Thomas, Jose, Roby Thekkudan & Jose, Joyce, 2023, Capulopsyche keralensis gen. et sp. nov., a new genus and species of the subfamily Taleporiinae (Lepidoptera: Psychidae) from Kerala, India, pp. 270-284 in Zootaxa 5258 (3)</i> on pages 272-282, DOI: 10.11646/zootaxa.5258.3.2, <a href="http://zenodo.org/record/7780180">http://zenodo.org/record/7780180</a>
Etale descent obstruction and anabelian geometry of curves over finite fields
No full textLet and be smooth, proper and geometrically integral curves over afinite field . Any morphism from to induces a morphism of their\'etale fundamental groups. The anabelian philosophy proposed by Grothendiecksuggests that, when has genus at least , all open homomorphisms betweenthe \'etale fundamental groups should arise in this way from a nonconstantmorphism of curves. We relate this expectation to the arithmetic of the curve over the global function field . Specifically, we show thatthere is a bijection between the set of conjugacy classes of well-behavedmorphism of fundamental groups and locally constant adelic points of thatsurvive \'etale descent. We use this to provide further evidence for theanabelian conjecture by relating it to another recent conjecture by Sutherlandand the second author
On polar Legendre polynomials
No full text10 pages, no figures.-- MSC2000 codes: Primary 42C05; Secondary 33C25.-- ArXiv pre-print available at: http://arxiv.org/abs/0709.4537Accepted in Rocky Mountain Journal of Mathematics.We introduce a new class of polynomials {Pn}, that we call polar Legendre polynomials, they appear as solutions of an inverse Gauss problem of equilibrium
position of a field of forces with n + 1 unit masses. We study algebraic, differential
and asymptotic properties of this class of polynomials, that are simultaneously
orthogonal with respect to a differential operator and a discrete-continuous Sobolev
type inner product.Research by first author (H.P.) was partially supported by Dirección General de Investigación, Ministerio de Ciencia y Tecnología de España, under grant MTM2006-13000-C03-02, by Comunidad de Madrid-Universidad Carlos III de Madrid, under grant CCG06-UC3M/EST-0690 and by Centro de Investigación Matemática de Canarias (CIMAC). Research by second author (J.Y.B.) was supported by CNPq-TWAS. Research by third author (W.U.) was partially supported by Centro de Investigación Matemática de Canarias (CIMAC).En prens
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