Shadow lines in the arithmetic of elliptic curves

Let E/Q be an elliptic curve and p a rational prime of good ordinary reduction. For every imaginary quadratic field K/Q satisfying the Heegner hypothesis for E we have a corresponding line in E(K)\otimes Q_p, known as a shadow line. When E/Q has analytic rank 2 and E/K has analytic rank 3, shadow lines are expected to lie in E(Q)\otimes Qp. If, in addition, p splits in K/Q, then shadow lines can be determined using the anticyclotomic p-adic height pairing. We develop an algorithm to compute anticyclotomic p-adic heights which we then use to provide an algorithm to compute shadow lines. We conclude by illustrating these algorithms in a collection of examples.

Information for the diagnosis and treatment of root resorption due to tooth replantation

A favorable prognosis after tooth avulsion depends on some variables, such as the extra-alveolar period and storage medium. Vitality of the periodontal ligament cells is considered a critical factor for a successful outcome without root resorption. The dental surgeon is provided with clinical information and radiographic findings to establish a diagnosis and may rely on current available guidelines. Once trauma has occurred, treatment must be quick and effective, and periodic follow-up must be performed. Clinical, radiographic, and histologic characteristics for each type of root resorption due to tooth replantation are presented, with the aim to provide information for the diagnosis and treatment of healing complications.

Single-use Trocar Is it Possible to Reprocess it After the First Use?

The aim of this study was to verify and describe the presence of microorganisms in the single-use trocar after its use in surgical procedures, and after this device was submitted to cleaning, conditioning, and sterilization by physicochemical processes (formaldehyde, ethylene oxide, and hydrogen peroxide plasma). Twenty-eight trocars of the Ethicon, Auto-suture, and Aesculap brands, were randomly selected and analyzed after laparoscopic cholecystectomy. The results have shown that cultures grown of the material collected from the trocars, immediately after its use and before its sterilization process, showed the presence of bacteria and fungi in 46.5% (13). In 53.5% (15) of the trocars, the presence of microorganisms was not detected, very likely due to niche`s scarcity. In the cultures grown of the 28 trocars after being submitted to sterilization processes, the presence of microorganisms was not verified. We can therefore conclude that although trocars possess compartments not easily accessed for cleaning, these devices can be adequately cleaned and effectively sterilized, when well manipulated, in the institution where the study was carried out by the processes of steam sterilization at low temperature and formaldehyde, ethylene oxide, and hydrogen peroxide plasma.

Agar-based films for application as polymer electrolytes

New types of polymer electrolytes based on agar have been prepared and characterized by impedance spectroscopy, X-ray diffraction measurements, UV-vis spectroscopy and scanning electronic microscopy (SEMI). The best ionic conductivity has been obtained for the samples containing a concentration of 50 wt.% of acetic acid. As a function of the temperature the ionic conductivity exhibits an Arrhenius behavior increasing from 1.1 x 10(-4) S/cm at room temperature to 9.6 x 10(-4) S/cm at 80 degrees C. All the samples showed more than 70% of transparency in the visible region of the electromagnetic spectrum, a very homogeneous surface and a predominantly amorphous structure. All these characteristics imply that these polymer electrolytes can be applied in electrochromic devices. (C) 2009 Elsevier Ltd. All rights reserved.

Plasticized pectin-based gel electrolytes

Pectin is a natural polymer present in plants and, as all natural polymers has biodegradation properties. Chemically, pectin is a polysaccharide composed of a linear chain of 1 -> 4 linked galacturonic acids, which is esterified with methanol at 80%. The pectin-based gel electrolytes in a transparent film form were obtained by a plasticization process with glycerol and addition of LiClO(4). The films showed good ionic conductivity results, which increased from 10(-5) S/cm for the samples with 37 wt.% of glycerol to 4.7 x 10(-4) S/cm at room temperature for the sample with 68 wt.% of glycerol. The electrochemical behaviors of the samples were studied by electrochemical impedance spectroscopy (EIS), and Nyquist graphs are showed and discussed. The obtained pectin-based samples also presented good adherence to the glass, flexibility, homogeneity (SEM) and transparency (about 70% in the vis) properties. They are good candidates to be applied as gel electrolytes in electrochromic devices. (C) 2009 Elsevier Ltd. All rights reserved.

Thermal behavior and structural properites of plant-derived eugenyl acetate

Eugenol is an allyl chain-substituted guaiacol in the biosynthesized phenylpropanoid compound class derived from Syzygium aromaticum L. and widely used in folk medicine. Nonetheless, its pharmacological use is limited by some problems, such as instability when exposed to light and high temperature. In order to enhance stability, the eugenol molecule was structurally modified, resulting in eugenyl acetate. The eugenyl acetate`s thermal behavior and crystal structure was then characterized by differential scanning calorimetry (DSC) and X-ray diffraction (XRD) and compared to a commercial sample.

Characterization of the raw essential oil eugenol extracted from Syzygium aromaticum L.

Eugenol is the main volatile compound extracted oil from clove bud, Syzygium aromaticum L., and used in traditional medicine, as a bactericide, fungicide, anesthetic, and others. Its extraction was performed using hydrodistillation which is the most common extraction technique. Its components and thermal behavior were evaluated using gas chromatography (GC) and differential scanning calorimetry (DSC), which provide a better characterization of these natural compounds. This extracted product was compared to the standard eugenol results. The GC results suggested similar to 90% eugenol was found in the total extracted oil, and some of its boiling characteristics were 270.1 A degrees C for peak temperature and 244.1 J g(-1) for the enthalpy variation.

Förstudie av MMS-tjänster för bildöverförd trafikinformation

Vägverket har ett önskemål om att distribuera trafikinformation till trafikanter. Vi fick uppdraget att undersöka om MMS skulle kunna användas i detta syfte. Eftersom MMS är en ny teknik med multimediala egenskaper som kan leverera stora textmängder, bild, ljud och video, beslöt vi oss för att koncentrera oss på de bilder som kommer från Vägverkets trafik- och väglagskameror som finns längs våra vägar.Det finns en stor mängd av möjliga tjänster som kan utvecklas, riktade till olika målgrupper och som strävar till att ge trafikanter ett beslutsunderlag vid val av färdsätt, färdväg eller starttid. Vi valde i arbetet en storstadspendlare som kan få en insikt om hur det ser ut längs vägen till arbetsplatsen. En annan tjänst är till landsvägspendlaren som kan beställa en bild från en känslig vägsträcka under vintertid. Tillsammans med dessa bilder visas ett textmeddelande om hur trafiksituationen ser ut eller vilket väder det är vid kamerans position. Målet med tjänsterna är att förbättra framkomligheten i trafiken och till följd av det, trafiksäkerheten och miljön.Examensarbetet fokuserar på den tjänsteteori och det systemarkitekturarbete som har ingått i magisterutbildningen. Givetvis har vi också utgått från de önskemål samt den infrastruktur som Vägverket har.

Copingstrategier hos föräldrar och syskon till barn med cancer : en litteraturstudie

Syftet med denna litteraturstudie var att beskriva de copingstrategier som föräldrar och syskon till barn med cancer använde för att hantera problem under vårdtiden, samt att beskriva vilka faktorer som påverkade dessa copingstrategier. Litteratursökningen utfördes via databasen Elin@Dalarna och sökorden som användes var childhood cancer, paediatric cancer, cancer, parents, siblings, coping, och coping strategies. Inklusions-kriterierna var att artiklarna skulle vara publicerade 1999 eller senare, skrivna på engelska och finnas i fulltext på databasen. Sökningen resulterade i 20 artiklar som ansågs vara relevanta för arbetets syfte. En granskning av artiklarna gjordes och betygen G, VG, MVG och IG delades ut. Resultatet visade att föräldrar och syskon använde sig av en mängd olika copingstrategier för att hantera de psykologiska och praktiska problem som uppstod under vårdtiden. Optimism, informationssökning, sökande av socialt stöd, aktivt problemlösande, undvikande beteenden, självkritiserande samt önsketänkande var några exempel på olika copingstrategier. Faktorer som påverkade copingstrategierna var bland annat det sjuka barnets diagnos och ålder, syskonens ålder, familjestorlek, hemstadens storlek, ekonomisk börda, religion och brist på kommunikation.

Waldorfpedagogiken – religion eller inte?

Waldorfpedagogiken har utvecklats från antroposofin och används idag i skolor över hela världen. Antroposofin uppfyller flera av de viktigaste kriterierna i de vanligaste definitionerna av religion.  I denna artikel behandlas frågan om huruvida waldorfpedagogiken ska uppfattas som religiös eller inte. Mitt material består av skriftliga och elektroniska källor av olika slag, intervjuer samt observationer på en waldorfskola. Frågan kommer att diskuteras utifrån tre aspekter: ideologisk frikoppling, lärarens roll samt potentiellt religiösa inslag relaterade till morgonspråket och religionsundervisning. Jag föreslår att waldorfpedagogiken ska ses som en hybrid i den terminologi som Siv-Ellen Kraft använder. En hybrid är en företeelse där en för­ståelse med religiösa inslag utgör en av flera möjligheter (Kraft 2011: 78). Trots tillämpandet av detta perspektiv kvarstår dock andra problematiska områden gällande relationen mellan waldorfpedagogik och religion.

Primary Nesting Sites of the Piping Plover, Least Tern, Roseate Tern, and Bald Eagle

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PRIORITIZING LAND PURCHASES FOR THE BELGRADE REGIONAL CONSERVATION ALLIANCE

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Prioritizing Land Purchases for the Belgrade Regional Conservation Alliance

The Belgrade Regional Conservation Alliance is an organization that is dedicated to preserving land and water quality in the Belgrade Lakes region in Maine. The BRCA holds land in such towns as Belgrade, Mount Vernon, New Sharon, Vienna, Rome, Smithfield, and Oakland. The BRCA is looking to expand its acreage in and around these areas to better accommodate the public and to promote the ongoing effort to conserve land as part of the Kennebec Highlands Project. The BRCA is currently considering parcels of 50+ acres in New Sharon, Rome, Belgrade, and Mount Vernon. In order to identify possible suitable parcels, we completed a GIS analysis and produced these layered maps, which highlight areas of land that we think might be desirable to the BRCA. Our analysis encompasses human access, wildlife access, and the locations and sizes of parcels.