External radiotherapy for circumscribed choroidal haemangiomas using a modified retinoblastoma technique

International Nuclear Information System (INIS)

Eide, N.; Syrdalen, P.; Tausjoe, J.; Tveraa, K.

1995-01-01

This report describes two cases of circumscribed choroidal haemangiomas involving the fovea, complicated by serous retinal detachment. Laser photocoagulation, generally accepted as the treatment of choice for choroidal haemangioma, was considered either to be of no visual benefit or a risk for jeopardizing vision further due to the subfoveolar lesions. Fractionated radiotherapy using a lens-sparing, modified retinoblastoma technique, was given, using circular fields of 15 mm diameter. The dose was 24 Gy in 8 fractions. In both eyes the retina reattached completely. The visual acuity improved markedly in the first, and was restored to the prior level in the second. Normalization of a high intraocular pressure was also achieved in the second case. We believe this method to be a reasonable and effective therapy for some choroidal haemangiomas after careful individual consideration. (au) 17 refs

Circumscribing campo rupestre - megadiverse Brazilian rocky montane savanas.

Science.gov (United States)

Alves, R J V; Silva, N G; Oliveira, J A; Medeiros, D

2014-05-01

Currently campo rupestre (CR) is a name accepted and used internationally by botanists, zoologists, and other naturalists, usually applied to a very specific ecosystem, despite the lack of a consensual published circumscription. We present a tentative geographic circumscription of the term, combining data on climate, geology, geomorphology, soil, flora, fauna and vegetation. The circumscription of campo rupestre proposed herein is based on the following premises: (1) the classification of vegetation is not an exact science, and it is difficult to attain a high degree of consensus to the circumscription of vegetation names; (2) despite this, vegetation classification is useful for conservation and management. It is thus desirable to circumscribe vegetation types with the greatest attainable precision; (3) there is a need to preserve all montane and rocky vegetation types, regardless of classification, biome, etc; (4) the CRs are formed by a complex mosaic of vegetation types including rock-dwelling, psammophilous, aquatic, epiphytic, and penumbral plant communities. Campos rupestres stricto sensu are a Neotropical, azonal vegetation complex endemic to Brazil, forming a mosaic of rocky mountaintop "archipelagos" inserted within a matrix of zonal vegetation, mainly in the Cerrado and Caatinga provinces of the Brazilian Shield (southeastern, northeastern and central-western regions), occurring mainly above 900 m asl. up to altitudes exceeding 2000 m, having measured annual precipitation between 800 and 1500 mm, and an arid season of two to five months.

Association between expression of the bone morphogenetic proteins 2 and 7 in the repair of circumscribed cartilage lesions with clinical outcome

DEFF Research Database (Denmark)

Schmal, Hagen; Niemeyer, Philipp; Zwingmann, Jörn

2010-01-01

patients had no cartilage lesion and served as a control group, the other 42 patients with circumscribed cartilage defects were treated by microfracturing (19) or by an Autologous Chondrocyte Implantation (23). The concentrations of BMP-2 and BMP-7 were determined by ELISA. The clinical status...

Use and effectiveness of scintigraphy, sonography and angiography in circumscribed disease of the liver

Energy Technology Data Exchange (ETDEWEB)

Pokieser, H; Czembirek, H; Mayrhofer, H; Urbanek, A; Kahn, P; Weiss, W; Base, W [Ludwig-Boltzmann-Institut fuer Radiologisch-Physikalische Tumordiagnostik, Vienna (Austria); Vienna Univ. (Austria). 1. Medizinische Klinik; Hanuschkrankenhaus, Vienna (Austria). 1. Medizinische Abt.)

1977-02-01

The effectiveness of scintigraphy, sonography and angiography is compared in a material of 140 cases of circumscribed disease of the liver. Typical clinical starting points are defined as points of reference of the diagnostic techniques. Clinical diagnosis is very safe in cases of secondary blastoma and hepatocellular carcinoma of the liver. Since the great majority of these conditions cause space-occupying lesions of the liver, problems of radiologic diagnosis are confined to the smaller number of clinically ill-defined lesions. For the diagnosis of secondary blastomas and cystic processes of all kinds, scintigraphy and sonography are not improved by angiography. Solid space-occupying lesions of unknown origin, however, can only be recognized with angiography. Histology of both benign and malignant processes will be correct in more than 90% of cases.

Circumscribing campo rupestre – megadiverse Brazilian rocky montane savanas

Directory of Open Access Journals (Sweden)

RJV. Alves

Full Text Available Currently campo rupestre (CR is a name accepted and used internationally by botanists, zoologists, and other naturalists, usually applied to a very specific ecosystem, despite the lack of a consensual published circumscription. We present a tentative geographic circumscription of the term, combining data on climate, geology, geomorphology, soil, flora, fauna and vegetation. The circumscription of campo rupestre proposed herein is based on the following premises: (1 the classification of vegetation is not an exact science, and it is difficult to attain a high degree of consensus to the circumscription of vegetation names; (2 despite this, vegetation classification is useful for conservation and management. It is thus desirable to circumscribe vegetation types with the greatest attainable precision; (3 there is a need to preserve all montane and rocky vegetation types, regardless of classification, biome, etc; (4 the CRs are formed by a complex mosaic of vegetation types including rock-dwelling, psammophilous, aquatic, epiphytic, and penumbral plant communities. Campos rupestres stricto sensu are a Neotropical, azonal vegetation complex endemic to Brazil, forming a mosaic of rocky mountaintop “archipelagos” inserted within a matrix of zonal vegetation, mainly in the Cerrado and Caatinga provinces of the Brazilian Shield (southeastern, northeastern and central-western regions, occurring mainly above 900 m asl. up to altitudes exceeding 2000 m, having measured annual precipitation between 800 and 1500 mm, and an arid season of two to five months.

[Circumscribed palmar hypokeratosis (CPM): The diagnostic value of dermoscopy].

Science.gov (United States)

Topin-Ruiz, S; Debarre, J-M; Blanchard, E; Kettani, S; Valmier, P-J; Martin, L; Le Corre, Y

2017-03-01

Circumscribed palmar hypokeratosis (CPH) is a rare skin disease, first described in 2002, associated with sudden localized reduction of the corneal layer. In most cases, it presents as an isolated rounded erythematous palmar lesion on the thenar eminence. We describe the dermoscopic semiology of CPH in 3 cases. Three patients between the ages of 59 and 72 presented very limited erythematous lesions suggestive of CPH. Dermoscopic examination of these lesions provided similar findings. Biopsy, which was performed in one patient, confirmed the diagnosis of CPH. Two dermoscopic elements of CPH are characteristic: (1) the sides of the lesion have a "stair step" or "geological strata" type of configuration, and the thickness of the different strata varies; (2) the centre of the lesion showed a homogeneous erythematous area with a vascular pattern composed of dotted vessels of the superficial dermis and sometime vascular loops. These dermoscopic aspects are characteristic and enable CPH to be differentiated from Bowen's disease or porokeratosis of Mibelli. In Bowen's disease, there is no stair step like aspect to the sides of lesions; further, the centre of the lesion shows glomerular vessels (coiled vessels) and/or globular vessels (small red clods). In porokeratosis, peripheral keratotic "white track" structures comprise a single pigmented channel or a double white line. There is no "stair step" or central vascular pattern. The dermoscopic semiology of CPH is highly characteristic and enables differentiation from Bowen's disease and porokeratosis. Copyright © 2016 Elsevier Masson SAS. All rights reserved.

A few of my favorite things: circumscribed interests in autism are not accompanied by increased attentional salience on a personalized selective attention task.

Science.gov (United States)

Parsons, Owen E; Bayliss, Andrew P; Remington, Anna

2017-01-01

Autistic individuals commonly show circumscribed or "special" interests: areas of obsessive interest in a specific category. The present study investigated what impact these interests have on attention, an aspect of autistic cognition often reported as altered. In neurotypical individuals, interest and expertise have been shown to result in an automatic attentional priority for related items. Here, we examine whether this change in salience is also seen in autism. Adolescents and young adults with and without autism performed a personalized selective attention task assessing the level of attentional priority afforded to images related to the participant's specific interests. In addition, participants performed a similar task with generic images in order to isolate any effects of interest and expertise. Crucially, all autistic and non-autistic individuals recruited for this study held a strong passion or interest. As such, any differences in attention could not be solely attributed to differing prevalence of interests in the two groups. In both tasks, participants were asked to perform a central target-detection task while ignoring irrelevant distractors (related or unrelated to their interests). The level of distractor interference under various task conditions was taken as an indication of attentional priority. Neurotypical individuals showed the predicted attentional priority for the circumscribed interest images but not generic items, reflecting the impact of their interest and expertise. Contrary to predictions, autistic individuals did not show this priority: processing the interest-related stimuli only when task demands were low. Attention to images unrelated to circumscribed interests was equivalent in the two groups. These results suggest that despite autistic individuals holding an intense interest in a particular class of stimuli, there may be a reduced impact of this prior experience and expertise on attentional processing. The implications of this

Characteristics of Quoit filter, a digital filter developed for the extraction of circumscribed shadows, and its applications to mammograms

International Nuclear Information System (INIS)

Isobe, Yoshiaki; Ohkubo, Natsumi; Yamamoto, Shinji; Toriwaki, Jun-ichiro; Kobatake, Hidefumi.

1993-01-01

This paper presents a newly developed filter called Quoit filter, which detects circumscribed shadows (concentric circular isolated image), like typical cancer regions. This Quoit filter is based on the mathematical morphology and is found to have interesting facts as follows. (1) Output of this filter can be analytically expressible when an input image is assumed to be a concentric circular model (output is expectable for typical inputs). (2) This filter has an ability to reconstruct original isolated models mentioned in (1) selectively, when this filter is applied sequentially twice. This filter was tested on the detection of cancer regions in X-ray mammograms, and for 12 cancer mammograms, this filter achieved a true-positive cancer detection rate of 100 %. (author)

Bacillus Strains Most Closely Related to Bacillus nealsonii Are Not Effectively Circumscribed within the Taxonomic Species Definition

Directory of Open Access Journals (Sweden)

K. Kealy Peak

2011-01-01

Full Text Available Bacillus strains with >99.7% 16S rRNA gene sequence similarity were characterized with DNA:DNA hybridization, cellular fatty acid (CFA analysis, and testing of 100 phenotypic traits. When paired with the most closely related type strain, percent DNA:DNA similarities (% S for six Bacillus strains were all far below the recommended 70% threshold value for species circumscription with Bacillus nealsonii. An apparent genomic group of four Bacillus strain pairings with 94%–70% S was contradicted by the failure of the strains to cluster in CFA- and phenotype-based dendrograms as well as by their differentiation with 9–13 species level discriminators such as nitrate reduction, temperature range, and acid production from carbohydrates. The novel Bacillus strains were monophyletic and very closely related based on 16S rRNA gene sequence. Coherent genomic groups were not however supported by similarly organized phenotypic clusters. Therefore, the strains were not effectively circumscribed within the taxonomic species definition.

Diverse Lifestyles and Strategies of Plant Pathogenesis Encoded in the Genomes of Eighteen Doethideomycetes Fungi

Energy Technology Data Exchange (ETDEWEB)

Ohm, Robin A.; Feau, Nicolas; Henrissat, Bernard; Schoch, Conrad L.; Horwitz, Benjamin A.; Barry, Kerrie W.; Condon, Bradford J.; Copeland, Alex C.; Dhillon, Braham; Glaser, Fabien; Hesse, Cedar N.; Kosti, Idit; LaButti, Kurt; Lindquist, Erika A.; Lucas, Susan; Salamov, Asaf A.; Bradshaw, Rosie E.; Ciuffetti, Lynda; Hamelin, Richard C.; Kema, Gert H. J.; Lawrence, Christopher; Scott, James A.; Spatafora, Joseph W.; Turgeon, B. Gillian; de Wit, Pierre J. G. M.; Zhong, Shaobin; Goodwin, Stephen B.; Grigoriev, Igor V.

2012-03-13

The class of Dothideomycetes is one of the largest and most diverse groups of fungi. Many are plant pathogens and pose a serious threat to agricultural crops grown for biofuel, food or feed. Most Dothideomycetes have only a single host and related species can have very diverse host plants. Eighteen genomes of Dothideomycetes have currently been sequenced by the Joint Genome Institute and other sequencing centers. Here we describe the results of comparative analyses of the fungi in this group.

Phytopathogenic Dothideomycetes

NARCIS (Netherlands)

Crous, P.W.; Verkley, G.J.M.; Groenewald, J.Z.

2013-01-01

This volume of Studies in Mycology is dedicated to the plant health officers of the world, who are constantly confronted by a range of plant pathogenic fungi that cause devastating diseases of agricultural and forestry crops. Five main groups of fungi are dealt with, namely Alternaria, Cercospora,

Coelomycetous Dothideomycetes with emphasis on the families Cucurbitariaceae and Didymellaceae

Directory of Open Access Journals (Sweden)

N. Valenzuela-Lopez

2018-06-01

Full Text Available The taxonomy of the coelomycetes has undergone dramatic changes in recent years, but remains controversial due to the high number of taxa involved, their poor morphological differentiation, the rare occurrence of the sexual morphs, and rapid loss of fertility in vitro. In the present study, we revisited the families Cucurbitariaceae and Didymellaceae (Pleosporales, Dothideomycetes, which include numerous plant pathogens, endophytic species associated with a wide host range, and saprobes. The taxonomy of two of the most relevant genera, i.e. Phoma and Pyrenochaeta, remains ambiguous after several phylogenetic studies, and needs further revision. We have studied a total of 143 strains of coelomycetes from clinical or environmental origin, by combining the LSU, ITS, tub2 and rpb2 sequences for a multi-locus analysis and a detailed morphological comparison. The resulting phylogenetic tree revealed that some fungi previously considered as members of Cucurbitariaceae represented five different families, and four of them, Neopyrenochaetaceae, Parapyrenochaetaceae, Pseudopyrenochaetaceae and Pyrenochaetopsidaceae, are proposed here as new. Furthermore, 13 new genera, 28 new species, and 20 new combinations are proposed within the Pleosporineae. Moreover, four new typifications are introduced to stabilise the taxonomy of these fungi. Key words: Cucurbitariaceae, Didymellaceae, Multigene phylogeny, New taxa, Phoma, Pleosporineae, Pleosporales, Pyrenochaeta, Pyrenochaetopsis, Taxonomy, Taxonomic novelties: New families: Neopyrenochaetaceae Valenzuela-Lopez, Crous, Cano, Guarro & Stchigel, Parapyrenochaetaceae Valenzuela-Lopez, Crous, Stchigel, Guarro & Cano, Pseudopyrenochaetaceae Valenzuela-Lopez, Crous, Stchigel, Guarro & Cano, Pyrenochaetopsidaceae Valenzuela-Lopez, Crous, Cano, Guarro & Stchigel, New genera: Allocucurbitaria Valenzuela-Lopez, Stchigel, Guarro & Cano, Cumuliphoma Valenzuela-Lopez, Stchigel, Crous, Guarro & Cano, Ectophoma Valenzuela

Fulltext PDF

Indian Academy of Sciences (India)

variation is a little circumscribed in species that are not products of sexual reproduction. ... nucleotide base se- quences of 293 individuals from a highly variable re- gion .... vertebrates described - fish, frogs, snakes, turtles, birds, mammals.

Linear headache: a recurrent unilateral head pain circumscribed in a line-shaped area.

Science.gov (United States)

Wang, Yu; Tian, Miao-Miao; Wang, Xian-Hong; Zhu, Xiao-Qun; Liu, Ying; Lu, Ya-Nan; Pan, Qing-Qing

2014-06-26

A headache circumscribed in a line-shaped area but not confined to the territory of one particular nerve had ever been described in Epicrania Fugax (EF) of which the head pain is moving and ultrashort. In a 25-month period from Feb 2012 to Mar 2014, we encountered 12 patients with a paroxysmal motionless head pain restricted in a linear trajectory. The head pain trajectory was similar to that of EF, but its all other features obviously different from those of EF. We named this distinctive but undescribed type of headache linear headache (LH). A detailed clinical feature of the headache was obtained in all cases to differentiate with EF, trigeminal autonomic cephalalgias (TACs) and cranial neuralgia. Similarities and differences in clinical features were compared between LH and migraine. The twelve LH patients (mean age 43.9 ± 12.2) complained of a recurrent, moderate to severe, distending (n = 9), pressure-like (n = 3) or pulsating (n = 3) pain within a strictly unilateral line-shaped area. The painful line is distributed from occipital or occipitocervical region to the ipsilateral eye (n = 5), forehead (n = 6) or parietal region (n = 1). The pain line has a trajecory similar to that of EF but no characteristics of moving. The headache duration would be ranged from five minutes to three days, but usually from half day to one day in most cases (n = 8). Six patients had the accompaniment of nausea with or without vomiting, and two patients had the accompaniment of ipsilateral dizziness. The attacks could be either spontaneous (n = 10) or triggered by noise, depression and resting after physical activity (n = 1), or by stress and staying up late (n = 1). The frequency of attacks was variable. The patients had well response to flunarizine, sodium valproate and amitriptyline but not to carbamazepine or oxcarbazepine. LH is different from EF, trigeminal autonomic cephalalgias (TACs) and cranial neuralgia, but it had couple of features similar to that of migraine. The

Production of {sup 186}Re and {sup 188}Re, and synthesis of {sup 188}Re-DTPA

Energy Technology Data Exchange (ETDEWEB)

Hashimoto, Kazuyuki; Motoishi, Shoji; Kobayashi, Katsutoshi; Izumo, Mishiroku [Department of Radioisotopes, Japan Atomic Energy Research Institute, Tokai, Ibaraki (Japan); Musdja, Muhammad Yanis

1999-08-01

Production of radioactive rhenium isotopes {sup 186}Re and {sup 188}Re, and synthesis of {sup 188}Re-DTPA have been studied. For {sup 186}Re, a production method by the {sup 185}Re(n, {gamma}) {sup 186}Re reaction in a reactor has been established. For {sup 188}Re, a production method by the double neuron capture reaction of {sup 186}W, which produces a {sup 188}W/{sup 188}Re generator, has been established. For synthesis of {sup 188}Re-DTPA, the optimum conditions, including pH, the amounts of regents and so on, have been determined. (author)

Re-telling, Re-evaluating and Re-constructing

Directory of Open Access Journals (Sweden)

Gorana Tolja

2013-11-01

Full Text Available 'Graphic History: Essays on Graphic Novels and/as History '(2012 is a collection of 14 unique essays, edited by scholar Richard Iadonisi, that explores a variety of complex issues within the graphic novel medium as a means of historical narration. The essays address the issues of accuracy of re-counting history, history as re-constructed, and the ethics surrounding historical narration.

Re-OPCAB vs. Re-CABG for myocardial revascularization.

Science.gov (United States)

Schütz, A; Mair, H; Wildhirt, S M; Gillrath, G; Lamm, P; Kilger, E; Reichart, B

2001-06-01

The present study compared redo coronary artery bypass grafting (Re-OPCAB) techniques with conventional redo coronary artery bypass grafting (Re-CABG) with particular focus on myocardial damage and clinical outcome parameters. Redo OPCAB (Re-OPCAB) was performed on 20 consecutive patients (15 males, mean age 63.2 +/- 9.3 years) using either the anterolateral approach for minimally invasive direct coronary artery bypass (n = 4) or the Octopus technique with regular sternotomy (n = 16). The Re-CABG group consisted of 20 consecutive patients (18 males, mean age 67.1 +/- 6.6 years). Groups did not differ in the number of atherosclerotic risk factors, or left ventricular, renal or liver function. Duration of surgery, number of bypass grafts and amount of transfused red blood cells did not differ significantly between both groups. Requirement of epinephrine (mg/h) within the first 24 h was lower in the Re-OPCAB group (Re-OPCAB: 0.14 +/- 0.22 vs. CABG: 0.88 +/- 0.97; p<0.01). In addition, CKMB levels at 24 h after operation were lower in the Re-OPCAB group (Re-OPCAB: 10.0 +/- 10.1 vs. Re-CABG: 38.7 +/- 28.1 U/l, p<0.001). There were no acute myocardial infarctions or deaths in the perioperative period. In the CABG group, there was a longer time period to extubation (hours) (Re-OPCAB: 9.8 +/- 3.9 vs. Re-CABG: 28.7 +/- 25.5; p<0.001), and the length of ICU stay was significantly prolonged (OPCAB: 1.3 +/- 0.5 versus Re-CABG: 4.4 +/- 8.7; p<0.001). The graft patency rate at follow-up was 95% in the Re-OPCAB group. Re-OPCAB results in decreased cardiac specific enzyme release, reduced requirement of inotropes and comparable clinical outcome in the early postoperative period. It is an appropriate alternative to conventional Re-CABG in selected patients awaiting reoperation for myocardial revascularization. Larger prospective and randomized trials are required to select the appropriate patient who benefits most from one or the other treatment regime.

Circumscribed interests in adolescents with Autism Spectrum Disorder: A look beyond trains, planes, and clocks.

Science.gov (United States)

Cho, Ivy Y K; Jelinkova, Kristina; Schuetze, Manuela; Vinette, Sarah A; Rahman, Sarah; McCrimmon, Adam; Dewey, Deborah; Bray, Signe

2017-01-01

Adolescence is a unique developmental period, characterized by physical and emotional growth and significant maturation of cognitive and social skills. For individuals with Autism Spectrum Disorder (ASD), it is also a vulnerable period as cognitive and social skills can deteriorate. Circumscribed interests (CIs), idiosyncratic areas of intense interest and focus, are a core symptom of ASD that may be associated with social development. Yet, relatively little is known about the expression of CIs in adolescents with ASD. Many studies investigating CIs have used images depicting items of special interest; however, it is not clear how images should be customized for adolescent studies. The goal of this study was to gain insight into the types of images that may be appropriate for studies of CIs in adolescents with ASD. To this end, we used a mixed methods design that included, 1) one-on-one interviews with 10 adolescents (4 with ASD and 6 TD), to identify categories of images that were High Autism Interest ('HAI') or High Typically Developing Interest ('HTD'), and 2) an online survey taken by fifty-three adolescents with ASD (42 male) and 135 typically developing (TD) adolescents (55 male) who rated how much they liked 105 'HAI' and 'HTD' images. Although we found a significant interaction between 'HAI' and 'HTD' categories and diagnosis, neither group significantly preferred one category over the other, and only one individual category ('Celebrities') showed a significant group effect, favored by TD adolescents. Males significantly preferred 'HAI' images relative to females, and TD adolescents significantly preferred images with social content relative to adolescents with ASD. Our findings suggest that studies investigating affective or neural responses to CI-related stimuli in adolescents should consider that stereotypical ASD interests (e.g. trains, gadgets) may not accurately represent individual adolescents with ASD, many of whom show interests that overlap with

Rhenium Re

International Nuclear Information System (INIS)

Busev, A.I.; Tiptsova, V.G.; Ivanov, V.M.

1978-01-01

The basic methods for determining rhenium in various objects are presented. The gravimetric determination of rhenium is based on a quantitative precipitation of ReO 4 - ions with tetraphenylarsonium chloride. The determination is not hindered by tungstates and molybdates. The potentiometric determination of rhenium in alloys (>=0.5% Re) is based on perrhenate ion reduction to Re(4) with the titrated solution of the Cr(2) salt. Re(7) is titrated in a hot sulfuric acid solution in the presence of KJ. The relative error of the method is 1 to 3%. The photometric determination of rhenium is performed by the rhodamide method in molybdenum-and tungsten-containing alloys and catalytically, in rocks, after it has been separated in the form of sulfide. The extraction-photometric determination of rhenium is carried out with the aid of methyl violet (analysis of a stock with a high content of Mo, W, Ta, Nb, Ti ahd Zr) and thio-oxine (the determination of Re is hindered by Au, Pt, Pd, Ru, Os, Rh, Ir). Also described are methods for differential-spectrophotometric determination of Re with the aid of thiocarbamide, as well as with the aid of dimethylglyoxime in the presence of SnCl 2 in an acid medium when Re is determined in its alloys with niobium and hafnium. It takes 2 hours to analyze the Hf-Re alloy and 3 hours to analyze the Nb-Re alloy, the standard deviation being 0.005 at 30-50% Re and 0.027 to 0.019 at 10-50% Re

Dependences on RE of superconducting properties of transition metal co-doped (Ca, RE)FeAs_2 with RE = La–Gd

International Nuclear Information System (INIS)

Yakita, H.; Ogino, H.; Sala, A.; Okada, T.; Yamamoto, A.; Kishio, K.; Iyo, A.; Eisaki, H.; Shimoyama, J.

2015-01-01

Highlights: • We synthesized Co or Ni co-doped (Ca, RE)FeAs_2 with RE = La–Gd. • Co or Ni co-doping improved superconducting properties of all (Ca, RE)FeAs_2 samples. • T_c of (Ca, RE)FeAs_2 decreased with decreasing ionic radii of RE"3"+. • Eu doped samples showed exceptionally low T_c and long interlayer distance. • Long interlayer distance of Eu doped samples suggested co-existence of Eu"2"+ and Eu"3"+. - Abstract: Dependence of superconducting properties of (Ca, RE)(Fe, TM)As_2 [(Ca, RE)112, TM: Co, Ni)] on RE elements (RE = La–Gd) was systematically investigated. Improvement of superconducting properties by Co or Ni co-doping was observed for all (Ca, RE)112, which is similar to Co-co-doped (Ca, La)112 or (Ca, Pr)112. T_c of Co-co-doped samples decreased from 38 K for RE = La to 29 K for RE = Gd with decreasing ionic radii of RE"3"+. However, Co-co-doped (Ca, Eu)112 showed exceptionally low T_c = 21 K probably due to the co-existence of Eu"3"+ and Eu"2"+ suggested by longer interlayer distance d_F_e_–_F_e of (Ca, Eu)112 than other (Ca, RE)112.

Circumscribed interests in adolescents with Autism Spectrum Disorder: A look beyond trains, planes, and clocks

Science.gov (United States)

Cho, Ivy Y. K.; Jelinkova, Kristina; Schuetze, Manuela; Vinette, Sarah A.; Rahman, Sarah; McCrimmon, Adam; Dewey, Deborah; Bray, Signe

2017-01-01

Adolescence is a unique developmental period, characterized by physical and emotional growth and significant maturation of cognitive and social skills. For individuals with Autism Spectrum Disorder (ASD), it is also a vulnerable period as cognitive and social skills can deteriorate. Circumscribed interests (CIs), idiosyncratic areas of intense interest and focus, are a core symptom of ASD that may be associated with social development. Yet, relatively little is known about the expression of CIs in adolescents with ASD. Many studies investigating CIs have used images depicting items of special interest; however, it is not clear how images should be customized for adolescent studies. The goal of this study was to gain insight into the types of images that may be appropriate for studies of CIs in adolescents with ASD. To this end, we used a mixed methods design that included, 1) one-on-one interviews with 10 adolescents (4 with ASD and 6 TD), to identify categories of images that were High Autism Interest (‘HAI’) or High Typically Developing Interest (‘HTD’), and 2) an online survey taken by fifty-three adolescents with ASD (42 male) and 135 typically developing (TD) adolescents (55 male) who rated how much they liked 105 ‘HAI’ and ‘HTD’ images. Although we found a significant interaction between ‘HAI’ and ‘HTD’ categories and diagnosis, neither group significantly preferred one category over the other, and only one individual category ('Celebrities') showed a significant group effect, favored by TD adolescents. Males significantly preferred ‘HAI’ images relative to females, and TD adolescents significantly preferred images with social content relative to adolescents with ASD. Our findings suggest that studies investigating affective or neural responses to CI-related stimuli in adolescents should consider that stereotypical ASD interests (e.g. trains, gadgets) may not accurately represent individual adolescents with ASD, many of whom show

Circumscribed interests in adolescents with Autism Spectrum Disorder: A look beyond trains, planes, and clocks.

Directory of Open Access Journals (Sweden)

Ivy Y K Cho

Full Text Available Adolescence is a unique developmental period, characterized by physical and emotional growth and significant maturation of cognitive and social skills. For individuals with Autism Spectrum Disorder (ASD, it is also a vulnerable period as cognitive and social skills can deteriorate. Circumscribed interests (CIs, idiosyncratic areas of intense interest and focus, are a core symptom of ASD that may be associated with social development. Yet, relatively little is known about the expression of CIs in adolescents with ASD. Many studies investigating CIs have used images depicting items of special interest; however, it is not clear how images should be customized for adolescent studies. The goal of this study was to gain insight into the types of images that may be appropriate for studies of CIs in adolescents with ASD. To this end, we used a mixed methods design that included, 1 one-on-one interviews with 10 adolescents (4 with ASD and 6 TD, to identify categories of images that were High Autism Interest ('HAI' or High Typically Developing Interest ('HTD', and 2 an online survey taken by fifty-three adolescents with ASD (42 male and 135 typically developing (TD adolescents (55 male who rated how much they liked 105 'HAI' and 'HTD' images. Although we found a significant interaction between 'HAI' and 'HTD' categories and diagnosis, neither group significantly preferred one category over the other, and only one individual category ('Celebrities' showed a significant group effect, favored by TD adolescents. Males significantly preferred 'HAI' images relative to females, and TD adolescents significantly preferred images with social content relative to adolescents with ASD. Our findings suggest that studies investigating affective or neural responses to CI-related stimuli in adolescents should consider that stereotypical ASD interests (e.g. trains, gadgets may not accurately represent individual adolescents with ASD, many of whom show interests that

Radioanalysis of RE enrichment of ion adsorption type RE ores

CERN Document Server

Zhao Shu Quan; Hu He Ping; Li Fu Sheng; Chen Ying Min; LiuShiMing

2002-01-01

Objective: To analyze the radioactivity in Rare Earth (RE) enrichment of ion adsorption type RE ores. Methods: Using HPGe-gamma spectrometer to analyze the activity ratio of gamma radionuclides in kind of samples, using FJ-2603 low background alpha, beta measurement apparatus to measure their total alpha and total beta activities, and using X-ray fluorescence spectrometer to analyze contents of La sub 2 O sub 3 and Y sub 2 O sub 3 , respectively. Results: HPGe gamma spectroscopy and X-ray fluorescence spectroscopy are simple, convenient and non-destructive methods of analyzing radionuclides and La sub 2 O sub 3 , Y sub 2 O sub 3 in RE enrichment of ion adsorption type RE ores, respectively. Conclusion: The basic data were provided for radiation protection and treatment of gas, liquid and solid waste in RE production of ion adsorption type RE ores; method and experience were provided for studying ion adsorption type RE ores

Spontaneous growth of whiskers on RE-bearing intermetallic compounds of Sn-RE, In-RE, and Pb-RE

International Nuclear Information System (INIS)

Liu Meng; Xian Aiping

2009-01-01

A phenomenon of the whiskers growth on the bulk rare earth (RE)-intermetallic compounds of NdSn 3 , NdIn 3 , and LaPb 3 is reported. The whiskers formed spontaneously on all of the RE-intermetallic compounds after exposed to room ambience (21-28 deg. C/20-56% RH, relative humidity) for several days. Among the samples, the propensity of whisker growth for NdSn 3 is the strongest, on which the tin whiskers were flourishing and covered all of the surfaces after exposed to room ambience for 22 days; while LaPb 3 is the secondary and NdIn 3 is the last one. Observed by SEM, the whiskers were exhibited as different morphology, size, and number density. The XRD analysis confirms the existence of RE(OH) 3 after whiskers formed, also, the weight gain curve of the samples exposed to room ambience supports that a spontaneous chemical reaction of the RE-intermetallic compounds with water in room ambience takes place. In discussion, it is proposed that the fresh metal atoms released by the chemical reaction could be causative to result in nucleation and spontaneous growth of the whiskers, while the anisotropy of crystal structure could be a reason to understand the difference of the whisker growth behaviors between Sn and Pb.

Epitaxial growth of ReS2(001) thin film via deposited-Re sulfurization

Science.gov (United States)

Urakami, Noriyuki; Okuda, Tetsuya; Hashimoto, Yoshio

2018-02-01

In this paper, we present the formation of large-size rhenium disulfide (ReS2) films via the sulfurization of Re films deposited on sapphire substrates. The effects of sulfurization temperature and pressure on the crystal quality were investigated. A [001]-oriented single crystal of ReS2 films with 6 × 10 mm2 area was realized. By sulfurizing Re films at 1100 °C, ReS2 films with well-defined sharp interfaces to c-plane sapphire substrates could be formed. Below and above the sulfurization temperature of 1100 °C, incomplete sulfurization and film degradation were observed. The twofold symmetry of the monocrystalline in-plane structure composed of Re-Re bonds along with Re-S bonds pointed to a distorted 1T structure, indicating that this structure is the most stable atomic arrangement for ReS2. For a S/Re compositional ratio equal to or slightly lower than 2.0, characteristic Raman vibrational modes with the narrowest line widths were observed. The typical absorption peak of ReS2 can be detected at 1.5 eV.

Circumscribed cicatricial alopecia due to localized sarcoidal granulomas and single-organ granulomatous arteritis: a case report and systematic review of sarcoidal vasculitis.

Science.gov (United States)

Yazdani Abyaneh, Mohammad-Ali; Raghu, Preethi; Kircher, Kenneth; Kutzner, Heinz; Kortz, Alison; Carlson, John Andrew

2015-10-01

Vasculitis associated with sarcoid granulomas is an uncommon phenomenon. A 72-year-old female presented with an expanding region of circumscribed alopecia and scalp atrophy of 2 months duration. Biopsy showed non-caseating granulomas, dermal thinning, loss of follicles, fibrosis and muscular vessels disrupted by mixed lymphocyte, macrophage and giant-cell infiltrates. Affected vessels had loss and fragmentation of the elastic lamina, fibrous replacement of their walls and luminal stenosis (endarteritis obliterans). Dermal and vascular advential intralymphatic granulomas and lymphangiectases were found by D2-40 expression, suggesting lymphatic obstruction and poor antigen clearance. No evidence of a post-zoster eruption, systemic sarcoidosis or systemic giant-cell arteritis was found. Two years later, prednisone had halted - but not reversed - progression of her alopecia. Review of the literature showed two types of vasculitis associated with sarcoid granulomas: (i) acute, self-limited leukocytoclastic vasculitis and (ii) chronic granulomatous vasculitis (GV). Persistence of non-degradable material or antigen contributes to the pathogenesis of granulomatous inflammation. In this case, lymphatic obstruction probably impeded clearance of nonimmunologic and/or immunologic stimuli permitting and sustaining the development of sarcoid granulomas and sarcoid GV, ultimately causing scarring alopecia and cutaneous atrophy. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

Adaptive prostate IGRT combining online re-optimization and re-positioning: a feasibility study

International Nuclear Information System (INIS)

Li Taoran; Zhu Xiaofeng; Lee, W Robert; Vujaskovic, Zeljko; Yin Fangfang; Wu, Q Jackie; Thongphiew, Danthai

2011-01-01

In prostate radiation therapy, inter-fractional organ motion/deformation has posed significant challenges on reliable daily dose delivery. To correct for this issue, off-line re-optimization and online re-positioning have been used clinically. In this paper, we propose an adaptive images guided radiation therapy (AIGRT) scheme that combines these two correction methods in an anatomy-driven fashion. The AIGRT process first tries to find a best plan for the daily target from a plan pool, which consists of the original CT plan and all previous re-optimized plans. If successful, the selected plan is used for daily treatment with translational shifts. Otherwise, the AIGRT invokes the re-optimization process of the CT plan for the anatomy of the day, which is afterward added to the plan pool as a candidate for future fractions. The AIGRT scheme is evaluated by comparisons with daily re-optimization and online re-positioning techniques based on daily target coverage, organs at risk (OAR) sparing and implementation efficiency. Simulated treatment courses for 18 patients with re-optimization alone, re-positioning alone and AIGRT shows that AIGRT offers reliable daily target coverage that is highly comparable to daily re-optimization and significantly improves from re-positioning. AIGRT is also seen to provide improved OAR sparing compared to re-positioning. Apart from dosimetric benefits, AIGRT in addition offers an efficient scheme to integrate re-optimization to current re-positioning-based IGRT workflow.

Theoretical analysis of hydrogen chemisorption on Pd(111), Re(0001) and PdML/Re(0001), ReML/Pd(111) pseudomorphic overlayers

DEFF Research Database (Denmark)

Pallassana, Venkataraman; Neurock, Matthew; Hansen, Lars Bruno

1999-01-01

not appear to provide an independent parameter for assessing surface reactivity. The weak chemisorption of hydrogen on the Pd-ML/Re(0001) surface relates to substantial lowering of the d-band center of Pd, when it is pseudomorphically deposited as a monolayer on a Re substrate. [S0163-1829(99)00331-2].......Gradient-corrected density-functional theory (DFT-GGA) periodic slab calculations have been used to analyze the binding of atomic hydrogen on monometallic Pd(111), Re(0001), and bimetallic Pd-mL/Re(0001) [pseudomorphic monolayer of Pd(111) on Re(0001)] and Re-ML/Pd(111) surfaces. The computed...

Spontaneous growth of whiskers on RE-bearing intermetallic compounds of Sn-RE, In-RE, and Pb-RE

Energy Technology Data Exchange (ETDEWEB)

Liu Meng [Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, 72 Wenhua Road, Shenyang 110016 (China); Xian Aiping, E-mail: ap.xian@imr.ac.c [Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Science, 72 Wenhua Road, Shenyang 110016 (China)

2009-11-03

A phenomenon of the whiskers growth on the bulk rare earth (RE)-intermetallic compounds of NdSn{sub 3}, NdIn{sub 3}, and LaPb{sub 3} is reported. The whiskers formed spontaneously on all of the RE-intermetallic compounds after exposed to room ambience (21-28 deg. C/20-56% RH, relative humidity) for several days. Among the samples, the propensity of whisker growth for NdSn{sub 3} is the strongest, on which the tin whiskers were flourishing and covered all of the surfaces after exposed to room ambience for 22 days; while LaPb{sub 3} is the secondary and NdIn{sub 3} is the last one. Observed by SEM, the whiskers were exhibited as different morphology, size, and number density. The XRD analysis confirms the existence of RE(OH){sub 3} after whiskers formed, also, the weight gain curve of the samples exposed to room ambience supports that a spontaneous chemical reaction of the RE-intermetallic compounds with water in room ambience takes place. In discussion, it is proposed that the fresh metal atoms released by the chemical reaction could be causative to result in nucleation and spontaneous growth of the whiskers, while the anisotropy of crystal structure could be a reason to understand the difference of the whisker growth behaviors between Sn and Pb.

Crystal structure of R.E. NiSn and R.E. PdSn equiatomic compounds

International Nuclear Information System (INIS)

Dwight, A.E.

1983-03-01

Call constants and volume per formula weight are tabulated for RE NiSn (RE = La to Lu, Y) and RE PdSn (RE = Nd to Ho). The unit cell constants are also plotted versus ionic radius of the RE; trends are noted

76 FR 40403 - R.E. Ginna Nuclear Power Plant, LLC, R.E. Ginna Nuclear Power Plant, R.E. Ginna Independent Spent...

Science.gov (United States)

2011-07-08

... NUCLEAR REGULATORY COMMISSION [Docket No. 50-244; Docket No. 72-67] R.E. Ginna Nuclear Power Plant, LLC, R.E. Ginna Nuclear Power Plant, R.E. Ginna Independent Spent Fuel Storage Installation; Notice of... Facility Operating License No. DPR-18, for the R.E. Ginna Nuclear Power Plant (Ginna), currently held by R...

Defining the predicted protein secretome of the fungal wheat leaf pathogen Mycosphaerella graminicola.

Directory of Open Access Journals (Sweden)

Alexandre Morais do Amaral

Full Text Available The Dothideomycete fungus Mycosphaerella graminicola is the causal agent of Septoria tritici blotch, a devastating disease of wheat leaves that causes dramatic decreases in yield. Infection involves an initial extended period of symptomless intercellular colonisation prior to the development of visible necrotic disease lesions. Previous functional genomics and gene expression profiling studies have implicated the production of secreted virulence effector proteins as key facilitators of the initial symptomless growth phase. In order to identify additional candidate virulence effectors, we re-analysed and catalogued the predicted protein secretome of M. graminicola isolate IPO323, which is currently regarded as the reference strain for this species. We combined several bioinformatic approaches in order to increase the probability of identifying truly secreted proteins with either a predicted enzymatic function or an as yet unknown function. An initial secretome of 970 proteins was predicted, whilst further stringent selection criteria predicted 492 proteins. Of these, 321 possess some functional annotation, the composition of which may reflect the strictly intercellular growth habit of this pathogen, leaving 171 with no functional annotation. This analysis identified a protein family encoding secreted peroxidases/chloroperoxidases (PF01328 which is expanded within all members of the family Mycosphaerellaceae. Further analyses were done on the non-annotated proteins for size and cysteine content (effector protein hallmarks, and then by studying the distribution of homologues in 17 other sequenced Dothideomycete fungi within an overall total of 91 predicted proteomes from fungal, oomycete and nematode species. This detailed M. graminicola secretome analysis provides the basis for further functional and comparative genomics studies.

(ReTranslating as Re-membering

Directory of Open Access Journals (Sweden)

Julie Tarif

2016-07-01

Full Text Available This paper explores how (retranslation – interlingual and intersemiotic – can be perceived as a way of both remembering the literary legacy of other cultures but also as a way of re-membering/re-generating the body of literature(s of the importing culture. It focuses on what is called “a classic” and anchors its reflexion in polysystem theory and in the metaphorical vision of literary works as an organic living body. To do so, it concentrates on the British literary classic Oliver Twist and its translations and adaptations into French. The article addresses the following questions: What is to be remembered of certain works? Why, how and by whom are those works remembered?

Re-thinking residential mobility

Science.gov (United States)

van Ham, Maarten; Findlay, Allan M.

2015-01-01

While researchers are increasingly re-conceptualizing international migration, far less attention has been devoted to re-thinking short-distance residential mobility and immobility. In this paper we harness the life course approach to propose a new conceptual framework for residential mobility research. We contend that residential mobility and immobility should be re-conceptualized as relational practices that link lives through time and space while connecting people to structural conditions. Re-thinking and re-assessing residential mobility by exploiting new developments in longitudinal analysis will allow geographers to understand, critique and address pressing societal challenges. PMID:27330243

Synthesis of {sup 188}Re-DMSA complex using carrier-free {sup 188}Re

Energy Technology Data Exchange (ETDEWEB)

Hashimoto, Kazuyuki; Izumo, Mishiroku [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment; Islam, M S

1997-03-01

The synthesis of rhenium-DMSA labelled compound using carrier-free {sup 188}Re from the {sup 188}W/{sup 188}Re generator has been carried out. Stannous chloride was used as the reducing agent for reduction of rhenium and ascorbic acid was used as an antioxidant in the reaction media. The dependence of the yield of Re-DMSA complex upon the concentration of reducing agent, pH, reaction time, anti-oxidant, carrier and temperature was investigated. Under optimum conditions, the yield of Re-DMSA complexes were more than 98% for the carrier-free as well as carrier-added {sup 188}Re. The stability of the Re-DMSA complexes at different pH and time were also investigated. It was found that the Re-DMSA complex was very stable and did not undergo any changes or decomposition with the changes of pH from its initial values even after 48 hours of pH change for carrier-free as well as carrier-added complexes. (author)

Re-annotation and re-analysis of the Campylobacter jejuni NCTC11168 genome sequence

Directory of Open Access Journals (Sweden)

Dorrell Nick

2007-06-01

Full Text Available Abstract Background Campylobacter jejuni is the leading bacterial cause of human gastroenteritis in the developed world. To improve our understanding of this important human pathogen, the C. jejuni NCTC11168 genome was sequenced and published in 2000. The original annotation was a milestone in Campylobacter research, but is outdated. We now describe the complete re-annotation and re-analysis of the C. jejuni NCTC11168 genome using current database information, novel tools and annotation techniques not used during the original annotation. Results Re-annotation was carried out using sequence database searches such as FASTA, along with programs such as TMHMM for additional support. The re-annotation also utilises sequence data from additional Campylobacter strains and species not available during the original annotation. Re-annotation was accompanied by a full literature search that was incorporated into the updated EMBL file [EMBL: AL111168]. The C. jejuni NCTC11168 re-annotation reduced the total number of coding sequences from 1654 to 1643, of which 90.0% have additional information regarding the identification of new motifs and/or relevant literature. Re-annotation has led to 18.2% of coding sequence product functions being revised. Conclusions Major updates were made to genes involved in the biosynthesis of important surface structures such as lipooligosaccharide, capsule and both O- and N-linked glycosylation. This re-annotation will be a key resource for Campylobacter research and will also provide a prototype for the re-annotation and re-interpretation of other bacterial genomes.

Labelling of Re-ABP with 188Re for bone pain palliation

International Nuclear Information System (INIS)

Arteaga de Murphy, Consuelo; Ferro-Flores, Guillermina; Pedraza-Lopez, Martha; Melendez-Alafort, Laura; Croft, B.Y.Barbara Y.; Ramirez, Flor de Maria; Padilla, Juan

2001-01-01

Etidronate and medronate have been labelled with technetium-99m ( 99m Tc-HEDP, 99m Tc-MDP) for bone scanning and, with rhenium-188 ( 188 Re-HEDP) to palliate the pain resulting from bone metastases. The objective of this study was to label alendronate, ABP, a new bisphosphonate, with SnF 2 -reduced- 188 Re. The reagents for the 5 mg ABP kit were SnF 2 , KReO 4 and gentisic acid at acid pH. The chemical, spectroscopic and microscopic characteristics, quality control, rat bone uptake of [ 188 Re]Re-ABP and similarities with 99m Tc-ABP are presented. We conclude that this is a promising new radiopharmaceutical for bone metastases pain palliation

Preparation of cyclotron-produced {sup 186}Re and comparison with reactor-produced {sup 186}Re and generator-produced {sup 188}Re for the labeling of bombesin

Energy Technology Data Exchange (ETDEWEB)

Moustapha, Moustapha E. [Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211 (United States); University of Missouri Research Reactor (MURR), University of Missouri-Columbia, Columbia, MO 65211 (United States); Ehrhardt, Gary J. [Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211 (United States); University of Missouri Research Reactor (MURR), University of Missouri-Columbia, Columbia, MO 65211 (United States); Smith, Charles J. [Department of Radiology, University of Missouri-Columbia, Columbia, MO 65211 (United States); University of Missouri Research Reactor (MURR), University of Missouri-Columbia, Columbia, MO 65211 (United States); Research Services, Harry S. Truman Memorial Veterans' Hospital, Columbia, MO 65201 (United States); Szajek, Lawrence P. [Positron Emission Tomography Department, National Institutes of Health, Bethesda, MD 20892-1180 (United States); Eckelman, William C. [Positron Emission Tomography Department, National Institutes of Health, Bethesda, MD 20892-1180 (United States); Jurisson, Silvia S. [Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211 (United States)]. E-mail: jurissons@missouri.edu

2006-01-15

The radioisotopes {sup 186}Re and {sup 188}Re have been extensively investigated for various forms of radiotherapy due to their useful and high-abundance {beta} particle emissions, low-abundance and imageable {gamma}-rays, and chemical resemblance to technetium. In addition, {sup 188}Re is available in no-carrier-added (NCA) form from long lived W-188 generators, whereas {sup 186}Re can be produced in large quantities from reactors, although not in NCA form. However, NCA {sup 186}Re can be produced on a cyclotron by a (p,n) reaction on {sup 186}W. The purpose of this study was to compare labeling of the peptide bombesin with these three forms of rhenium radioisotopes. Cyclotron-produced NCA {sup 186}Re was separated radiochemically from enriched {sup 186}W (96.9%) targets using high-purity methyl ethyl ketone (MEK). The resulting {sup 186}Re-MEK was then loaded onto a small alumina column to separate the resulting NCA {sup 186}Re from any remaining {sup 186}W. The experimental levels of impurities associated with {sup 186}Re at the end of the separation process were found to be 5.7x10{sup -6} Ci of {sup 182}Re (0.57%, t {sub 1/2}=12.7 h) and 1.283x10{sup -5} Ci of {sup 182m}Re (1.28%, t {sub 1/2}=2.67 days). The radionuclidic purity of the separated {sup 186}Re was found to be 99.6%, whereas the chemical identity was determined by reversed phase high-performance liquid chromatography (RP-HPLC) to be perrhenate ({sup 186}ReO{sub 4} {sup -}). Generator-produced {sup 188}ReO{sub 4} {sup -} from a {sup 188}W/{sup 188}Re generator (Oak Ridge National Laboratory) and CA {sup 186}ReO{sub 4} {sup -} produced from a {sup 185}Re(n,{gamma}){sup 186}Re reaction at the University of Missouri Research Reactor (MURR) were used for comparison with the NCA {sup 186}Re in subsequent studies. N{sub 3}S-5-Ava-BBN(7-14)NH{sub 2} conjugates provide flexibility for designing {sup 186,188}Re-labeled conjugates that retain high in vitro and in vivo specificity targeting of GRP receptor

Measurements of the microwave spectrum, Re-H bond length, and Re quadrupole coupling for HRe(CO)5

Science.gov (United States)

Kukolich, Stephen G.; Sickafoose, Shane M.

1993-11-01

Rotational transition frequencies for rhenium pentacarbonyl hydride were measured in the 4-10 GHz range using a Flygare-Balle type microwave spectrometer. The rotational constants and Re nuclear quadrupole coupling constants for the four isotopomers, (1) H187Re(CO)5, (2) H185Re(CO)5, (3) D187Re(CO)5, and (4) D185Re(CO)5, were obtained from the spectra. For the most common isotopomer, B(1)=818.5464(2) MHz and eq Q(187Re)=-900.13(3) MHz. The Re-H bond length (r0) determined by fitting the rotational constants is 1.80(1) Å. Although the Re atom is located at a site of near-octahedral symmetry, the quadrupole coupling is large due to the large Re nuclear moments. A 2.7% increase in Re quadrupole coupling was observed for D-substituted isotopomers, giving a rather large isotope effect on the quadrupole coupling. The Cax-Re-Ceq angle is 96(1)°, when all Re-C-O angles are constrained to 180°.

Re-irradiation tests of spent fuel at JMTR by means of re-instrumentation technique

International Nuclear Information System (INIS)

Nakamura, Jinichi; Shimizu, Michio; Endo, Yasuichi; Nabeya, Hideaki; Ichise, Kenichi; Saito, Junichi; Oshima, Kunio; Uetsuka, Hiroshi

1999-01-01

JAERI has developed re-irradiation test procedures of spent fuel irradiated at commercial reactor by means of re-instrumentation technique. Full length rods irradiated at commercial LWRs were re-fabricated to short length rods, and rod inner pressure gauges and fuel center thermocouples were re-instrumented to the rods. Re-irradiation tests to study the fuel behavior during power change were carried out by means of BOCA/OSF-1 facility at the JMTR. In the tests to study the fission gas release during power change, the rod inner pressure increase was observed during power change, especially during power reduction. The fission gas release during power reduction is estimated to be the release from fission gas bubbles on the grain boundary caused by the thermal stress in the pellet during power reduction. Re-irradiation test of gadolinia added fuel was performed by means of dual re-instrumentation technique (fuel center thermocouples and rod inner pressure gauge). A stepwise fission gas release during power change, and the following fuel center temperature change due to gap conductance change were observed. (author)

Studies of HEDP labelled with 188Re from different generators of 188W /188Re

International Nuclear Information System (INIS)

Marczewski, Barbara Szot

2006-01-01

The widespread interest in 188 Re for therapeutic applications, is due to its attractive 16,9 hours half-life, emission of a β - particle with maximum energy of 2.12 MeV and gamma-ray of 155 keV suitable for imaging. This work presents the radiolabelling of HEDP (etidronate) with 188 Re eluted from alumina-based 188 W/ 188 Re generators and tungstate-based 188 W/ 188 Re gel generators. Dependence of the yield of the 18 '8Re-HEDP on the concentration of the reduction agent, p H, reaction time, temperature and addition of carrier Re 2 O 7 were evaluated. The radiolabelling of 188 Re-HEDP procedure using the optimum conditions resulted a yield >= 98% for liquid and lyophilized kits. This basic formulation contains: 30 mg de HEDP, 7 mg de SnCl 2 , 3 mg de ascorbic acid and addition of 20 mug of Re 2 O 7 . The reactions were carried out with heating in boiling water for 30 minutes followed by 60 minutes of incubation. Another important aspect of this work was the radiochemical quality control comparing the results of PC, TLC and ion chromatography, along with the experiments with HPLC. The biological distribution proved the adequate bone uptake and in vivo stability of 188 Re-HEDP complexes. (author)

Fungal diversity notes 1-110: Taxonomic and phylogenetic contributions to fungal species

Digital Repository Service at National Institute of Oceanography (India)

Liu, J.K.; Hyde, K.D.; Jones, E.B.G.; Ariyawansa, H.A.; Bhat, D.J.; Boonmee, S.; Maharachchikumbura, S.S.N.; McKenzie, E.H.C.; Phookamsak, R.; Phukhamsakda, C.; Shenoy, B.D.; et.al

lineage in Dothideomycetes and its unique morphology The family is sister to Biatriosporaceae and Roussoellaceae The new genera are Allophaeosphaeria (Phaeosphaeriaceae), Amphibambusa (Amphisphaeriaceae), Brunneomycosphaerella (Capnodiales genera incertae...

Investigation on thermophysical properties of RE{sub 6}UO{sub 12}(s) (RE = La, Pr, Nd, Sm)

Energy Technology Data Exchange (ETDEWEB)

Sahu, Manjulata, E-mail: manju@barc.gov.in [Radioanalytical Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085 (India); Krishnan, K. [Fuel Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085 (India); Jain, Dheeraj [Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085 (India); Saxena, M.K. [Radioanalytical Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085 (India); Dash, Smruti [Product development Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085 (India)

2016-08-10

Highlights: • Synthesis of RE{sub 6}UO{sub 12}(s)(RE = La, Pr, Nd, Sm) was performed by combustion method and characterization by XRD. • Thermal expansion measurements were carried out on RE{sub 6}UO{sub 12}(s)(RE = Pr, and Sm) using HT-XRD. • Heat capacity of RE{sub 6}UO{sub 12}(s)(RE = La, Pr, Nd, Sm) was measured in the temperature range 300–870 K. • The nonstoichiometry in RE{sub 6}UO{sub 12}(s) was checked using TG, XPS, chemical analysis and electrical conductivity measurement. - Abstract: RE{sub 6}UO{sub 12}(s) (RE = La, Pr, Nd, Sm) was synthesized by citrate-nitrate combustion method. The synthesis condition for Pr{sub 6}UO{sub 12}(s) was optimized. Nonstoichiometry in these rare earth uranates in argon atmosphere was analysed using various techniques like thermogravimetry (TG), X-ray photo electron spectroscopy (XPS), chemical analysis and electrical conductivity measurements. Thermal expansions of RE{sub 6}UO{sub 12}(s) (RE = Pr and Sm) was studied in the temperature range 298–1273 K by high temperature X-ray powder diffractometry and compared with that of similar rare earth compounds reported in the literature. Heat capacity of RE{sub 6}UO{sub 12}(s) (RE = La, Pr, Nd, Sm) was measured by differential scanning calorimetry in the temperature range 300–870 K. Enthalpy, entropy and Gibbs energy functions of these compounds were computed from the measured heat capacity data.

Re-torsion of the ovaries

DEFF Research Database (Denmark)

Hyttel, Trine E W; Bak, Geske S; Larsen, Solveig B

2015-01-01

The increasing use of de-torsion of the ovaries may result in re-torsion. This review addresses risk of re-torsion and describes preventive strategies to avoid re-torsion in pre-menarcheal girls, and fertile and pregnant women. We clinically reviewed PubMed, Embase, Trip and Cochrane databases. T...

Re-Entry Trauma: Asian Re-Integration after Study in the West

Science.gov (United States)

Pritchard, Rosalind

2011-01-01

Many students who re-locate from host to home country are said to undergo a process of reverse culture shock akin to bereavement, involving stages of a grieving process. This has been likened to a "W-curve" in which feelings fluctuate before reaching a more balanced state. The present study examined the re-acculturation of Taiwanese and…

Critical evaluation and thermodynamic optimisation of the Si-RE systems: Part II. Si-RE system (RE = Gd, Tb, Dy, Ho, Er, Tm, Lu and Y)

International Nuclear Information System (INIS)

Kim, Junghwan; Jung, In-Ho

2015-01-01

Highlights: • The (Si-RE) (RE = Gd, Tb, Dy, Ho, Er, Tm, Lu and Y) systems have been reviewed. • The thermodynamic optimization of the (Si-RE) systems have been performed. • Systematic changes and similarities in the (Si-RE) systems were found. • The systematic approach resolved inconsistencies in the experimental data. • The systematic approach was used to assess the unexplored phase diagrams. - Abstract: A critical evaluation and optimisation of all available phase diagrams and thermodynamic data of the (Si-RE) (RE = Gd, Tb, Dy, Ho, Er, Tm, Lu and Y) systems was conducted to obtain reliable thermodynamic functions of all the phases in the system. In the thermodynamic modelling, a systematic analysis involving the similarity and periodicity observed in the lanthanide series was applied to resolve inconsistencies in the experimental data and to estimate the unknown thermodynamic properties and phase equilibria data. In particular, the phase diagrams and thermodynamic properties of (Si-Tm) and (Si-Lu) systems which are rarely investigated can be predicted from this approach. Systematic trends in thermodynamic properties of solid and liquid phases and phase diagram of the entire (Si-RE) systems were summarized

Entrepreneurship as re-sourcing

DEFF Research Database (Denmark)

Korsgaard, Steffen; Anderson, Alistair; Gaddefors, Johan

Objectives The purpose of this paper is to re-examine the concept of entrepreneurship in light of the current financial and environmental crisis and its socio-spatial impact. Building on Hudson’s analysis of production in late-capitalist societies, we identify problems inherent in the dominant...... of grounding in material reality, lacking emphasis on environmental externalities and an impoverished conceptualization of spatial relations. Comparing this analysis with the dominant opportunistic image of the entrepreneur, leads us to formulate a critique of this image. In formulating an alternative we build...... The paper presents a “new image” of entrepreneurship as re-sourcing. The concept of re-sourcing emphasizes the dual meaning of the word resource as both a stock of supply and strategy or action adopted in adverse circumstances. Re-sourcing thus signifies a shift in focus from opportunities to resources...

FIXING/CIRCUMSCRIBING/SUGGESTING/EVOKING

DEFF Research Database (Denmark)

Bergstrøm-Nielsen, Carl

2006-01-01

Shortened and translated version of the Danish article Sprog som musikalsk notation (to be found at vbn) ISBN 8791425077 (pdf online) ISBN 8791425042 (HTML online)   Gekürzte und ins Englische übersetzte Version des dänischen Artikels "Sprog som musikalsk notation". Stichwörter: Karlheinz Stockha...

Examination of rotator cuff re-tear

International Nuclear Information System (INIS)

Kitahara, Hiroyuki; Yabe, Yoshihiro; Norimatsu, Takahiro; Adachi, Shinji; Sera, Keisuke

2010-01-01

The six-month post-operative re-tear rate in 72 arthroscopic rotator cuff repair cases was 16.3% by MRI. The re-tear rate of massive tears was 50%. We investigated the details of the re-tears by MRI and arthroscopic findings. High re-tear rates were connected with cuff tear size and fatty degeneration of muscle belly. Cases with poor cuff quality in arthroscopically showed high re-tear rate. These results suggest that surgery operation should be performed as soon as possible after diagnosis of cuff tear to obtain good results. Cases with damage of long head of the biceps (LHB) are likely to develop impingement causes of re-tears. Some type of rehabilitation is required to avoid impingement in such cases. (author)

The Impact of Family Engagement and Child Welfare Services on Maltreatment Re-reports and Substantiated Re-reports.

Science.gov (United States)

Fuller, Tamara; Zhang, Saijun

2017-08-01

Despite decades of debate about the most effective ways to intervene with families reported to child protective services (CPS), little evidence exists regarding the types of services or approach that reduce children's risk of additional maltreatment. The current study used data collected during a statewide experimental evaluation of CPS to examine the impact of numerous service variables, family engagement, and family characteristics on the risk of maltreatment re-reports and substantiated re-reports among families initially reported for neglect and risk of harm. The sample included 4,868 families with screened-in reports that were randomly assigned to receive either an investigation or an assessment. The results of the Cox regression analyses found that service duration, intensity, and breadth were unrelated to maltreatment re-report or substantiated re-reports, but caseworker ratings of the service-need match were associated with both. The provision of domestic violence services was related to decreased risk of maltreatment re-reports. Increased levels of family engagement were associated with lowered risk of both maltreatment re-reports and substantiated re-reports. Once the effects of services, engagement, and family characteristics were taken into account, CPS response pathway (investigation or assessment) had no relationship to maltreatment re-reports or substantiated re-reports.

Sports video games: re-shaping football and re-defining fandom?

OpenAIRE

ervine bangor ac uk, j.

2017-01-01

This paper will examine ways in which football video games, such as Football Manager and FIFA, are re- shaping the sport of football and re-defining the relationship between fans and the sport. In so doing, it will explore ways in which football video games have been portrayed in both the UK and France through close study of the press, academic literature, the press and popular culture.To begin with, it will be argued that dismissive attitudes of some journalists and football managers towards...

Detection and quantification of ginsenoside Re in ginseng samples by a chromatographic immunostaining method using monoclonal antibody against ginsenoside Re.

Science.gov (United States)

Morinaga, Osamu; Tanaka, Hiroyuki; Shoyama, Yukihiro

2006-01-02

A chromatographic immunostaining method has been developed for the determination of ginsenoside Re (G-Re) in ginseng samples on a polyethersulphone (PES) membrane. G-Re standard and the extracts of ginseng roots were applied to a PES membrane and developed by methanol-water-acetic acid (45:55:1, by volume). G-Re was clearly detected by an immunostaining method using a monoclonal antibody against G-Re. The coloring spots of G-Re were analyzed quantitatively using NIH Image software indicating at least 0.125 microg of G-Re was detectable. G-Re can be analyzed quantitatively between 0.25 and 4.0 microg.

Calculation and evaluation of the activation cross sections for 187Re(n,2n)186m,gRe reactions

International Nuclear Information System (INIS)

Huang Xiaolong; Lu Hanlin; Zhou Chunmei

1998-01-01

The activation cross sections for 187 Re(n,2n) 186m,g Re reactions are calculated using UNF code. The calculations are in good agreement with the re-evaluated measured data. Finally the excitation function for 187 Re(n,2n) 186m,g Re reactions are evaluated and recommended based on present calculations and evaluated decay data

The Re-Think Tree.

Science.gov (United States)

Gear, Jim

1993-01-01

The Re-Think Tree is a simple framework to help individuals assess and improve their behaviors related to environmental issues. The branches of the tree in order of priority are refuse, reduce, re-use, and recycle. Roots of the tree include such things as public opinion, education, and watchdog groups. (KS)

Re-use of disposable coil dialysers

International Nuclear Information System (INIS)

Abbud Filho, M.

1980-01-01

Re-use of disposable dialysers has been in practice for over 16 years throughout the world but it still is a polemical subject. The main justification for it is the reduction of costs in the hemodialytic treatment. We evaluated the technique of re-use that we adopt by studying 33 patients who should re-utilize coil dialysers for 8 consecutive hemodialysis sessions. We investigated: 1) small and middle molecules clearances trough a radioisotopic method; 2) the integrity of the system regarding bacterial invasion; 3) the frequency of anti-N antibodies; 4) aspects of scanning electron microscopy (SEM) of dialysis membrane after re-use. We observed no changes in the dialysers performance during re-use. We conclude that the re-use of dialyzers is feasible, without risks for the patients, allowing marked reduction of costs, thus making possible to offer treatment to a larger number of uremic patients. (author)

Charge Carrier Trapping Processes in RE2O2S (RE = La, Gd, Y, and Lu)

NARCIS (Netherlands)

Luo, H.; Bos, A.J.J.; Dorenbos, P.

2017-01-01

Two different charge carrier trapping processes have been investigated in RE2O2S:Ln3+ (RE = La, Gd, Y, and Lu; Ln = Ce, Pr, and Tb) and RE2O2S:M (M = Ti4+ and Eu3+). Cerium, praseodymium and terbium act as recombination centers and hole trapping centers while host intrinsic defects provide the

Critical systematic evaluation and thermodynamic optimization of the Mn–RE system: RE = La, Ce, Pr, Nd and Sm

International Nuclear Information System (INIS)

Kim, Junghwan; Jung, In-Ho

2012-01-01

Highlights: ► The Mn–RE (RE = La, Ce, Pr, Nd and Sm) systems have been critically reviewed. ► The thermodynamic optimization of the Mn–RE systems have been performed. ► Systematic changes in the phase diagrams and thermodynamic properties were found. ► The systematic approach resolved inconsistencies in the experimental data. - Abstract: Critical evaluation and optimization of all available phase diagram and thermodynamic data for the Mn–RE (RE = La, Ce, Pr, Nd and Sm) systems have been conducted to obtain reliable thermodynamic functions of all the phases in the system. In the thermodynamic modeling, it is found that the Mn–RE systems show systematic changes in the phase diagrams and thermodynamic properties such as enthalpy of mixing in liquid state in the order of periodic number in the lanthanide series. This systematic thermodynamic modeling approach for all light RE elements can allow to resolve inconsistencies in the experimental data.

Polarization sensitive behaviour of the band-edge transitions in ReS2 and ReSe2 layered semiconductors

International Nuclear Information System (INIS)

Ho, C H; Lee, H W; Wu, C C

2004-01-01

The polarization sensitive behaviour of the band-edge transitions in ReS 2 and ReSe 2 layered compounds was studied using polarized-transmission and polarized-thermoreflectance (PTR) measurements with polarization angles from θ = 0 deg. (Evector parallel b-axis) to θ = 90 deg. (Evector perpendicular b-axis) at 300 K. The polarization dependence of the polarized energy gaps of ReS 2 and ReSe 2 shows a sinusoidal-like variation with respect to the angular change of the linearly polarized light. The angular dependences of the polarized energy gaps of ReS 2 and ReSe 2 were evaluated. The polarization sensitive behaviour of the band-edge excitons in rhenium disulfide and diselenide was characterized using angular dependent PTR measurements from θ = 0 deg. to 90 deg. The polarized transition intensities of the band-edge excitons (E 1 ex and E 2 ex ) of ReX 2 (X = S, Se) demonstrate a sinusoidal variation with respect to the angular change of the linearly polarized light. The angular dependence of the polarized transition probabilities of E 1 ex and E 2 ex is analysed. The polarization sensitive behaviours of ReX 2 (X = S, Se) layers are discussed

Re-design, re-use and recycle of temporary houses

Energy Technology Data Exchange (ETDEWEB)

Arslan, Hakan [Department of Construction, Faculty of Technical Education, University of Abant Izzet Baysal, Duzce 81100 (Turkey)

2007-01-15

Disasters are recurring to global problems, which results in homelessness. The affected region had economical, environmental and social problems as well. In relief and reconstruction phases, the need for integrated management appeared in order to use the national sources actively and productively. Especially housing implementations had an important role for future development of the affected region. For accelerating the reconstruction of the region and forming a sustainable community, which maintains itself socially, environmentally and economically over time; energy usage for construction should be kept to a minimum. Past research in Turkey shows that the cost of temporary houses (to be used as the short term shelter) had a ratio of 10-15% of the total expenses of whole construction activity. For saving money and protecting the environment and conserving scarce resources, the affected region must consider the option of temporary houses to meet their short and long-term need during the reconstruction process. After the end of usage, temporary houses should be able to be re-used for the same or new function. This study is a test of re-design and re-use of a temporary housing site; by using recycled materials, minimum energy and voluntary participation so that this site can finally become a permanent housing site. (author)

Atomic mobility in liquid and fcc Al-Si-Mg-RE (RE = Ce, Sc) alloys and its application to the simulation of solidification processes in RE-containing A357 alloys

Energy Technology Data Exchange (ETDEWEB)

Lu, Zhao; Zhang, Lijun [Central South Univ., Changsha (China). State Key Lab of Powder Metallurgy; Tang, Ying [Thermo-Calc Software AB, Solna (Sweden)

2017-06-15

This paper first provides a critical review of experimental and theoretically-predicted diffusivities in both liquid and fcc Al-Si-Mg-RE (RE = Ce, Sc) alloys as-reported by previous researchers. The modified Sutherland equation is then employed to predict self- and impurity diffusivities in Al-Si-Mg-RE melts. The self-diffusivity of metastable fcc Sc is evaluated via the first-principles computed activation energy and semi-empirical relations. Based on the critically-reviewed and presently evaluated diffusivity information, atomic mobility descriptions for liquid and fcc phases in the Al-Si-Mg-RE systems are established by means of the Diffusion-Controlled TRAnsformation (DICTRA) software package. Comprehensive comparisons show that most of the measured and theoretically-predicted diffusivities can be reasonably reproduced by the present atomic mobility descriptions. The atomic mobility descriptions for liquid and fcc Al-Si-Mg-RE alloys are further validated by comparing the model-predicted differential scanning calorimetry curves for RE-containing A357 alloys during solidification against experimental data. Detailed analysis of the curves and microstructures in RE-free and RE-containing A357 alloys indicates that both Ce and Sc can serve as the grain refiner for A357 alloys, and that the grain refinement efficiency of Sc is much higher.

Atomic mobility in liquid and fcc Al-Si-Mg-RE (RE = Ce, Sc) alloys and its application to the simulation of solidification processes in RE-containing A357 alloys

International Nuclear Information System (INIS)

Lu, Zhao; Zhang, Lijun

2017-01-01

This paper first provides a critical review of experimental and theoretically-predicted diffusivities in both liquid and fcc Al-Si-Mg-RE (RE = Ce, Sc) alloys as-reported by previous researchers. The modified Sutherland equation is then employed to predict self- and impurity diffusivities in Al-Si-Mg-RE melts. The self-diffusivity of metastable fcc Sc is evaluated via the first-principles computed activation energy and semi-empirical relations. Based on the critically-reviewed and presently evaluated diffusivity information, atomic mobility descriptions for liquid and fcc phases in the Al-Si-Mg-RE systems are established by means of the Diffusion-Controlled TRAnsformation (DICTRA) software package. Comprehensive comparisons show that most of the measured and theoretically-predicted diffusivities can be reasonably reproduced by the present atomic mobility descriptions. The atomic mobility descriptions for liquid and fcc Al-Si-Mg-RE alloys are further validated by comparing the model-predicted differential scanning calorimetry curves for RE-containing A357 alloys during solidification against experimental data. Detailed analysis of the curves and microstructures in RE-free and RE-containing A357 alloys indicates that both Ce and Sc can serve as the grain refiner for A357 alloys, and that the grain refinement efficiency of Sc is much higher.

Development of Premacy Hydrogen RE Hybrid

Energy Technology Data Exchange (ETDEWEB)

Wakayama, N. [Mazda Motor Corporation, Hiroshima (Japan)

2010-07-01

Hydrogen powered ICE (internal combustion engine) vehicles can play an important role as an automotive power source in the future, because of its higher reliability and cost performance than those of fuel cell vehicles. Combined with hydrogen, Mazda's unique rotary engine (RE) has merits such as a prevention of hydrogen pre-ignition. Mazda has been developing hydrogen vehicles with the hydrogen RE from the early 1990s. Premacy (Mazda5) Hydrogen RE Hybrid was developed and launched in 2009, following RX-8 Hydrogen RE delivered in 2006. A series hybrid system was adopted in Premacy Hydrogen RE Hybrid. A traction motor switches its windings while the vehicle is moving. This switching technology allows the motor to be small and high-efficient. The lithium-ion high voltage battery, which has excellent input-output characteristics, was installed. These features extend the hydrogen fuel driving range to 200 km and obtain excellent acceleration performance. The hydrogen RE can be also operated by gasoline (Dual Fuel System). The additional gasoline operation makes hydrogen vehicles possible to drive in non-hydrogen station area. With approval from the Japanese Ministry of Land Infrastructure and Transport, Mazda Premacy Hydrogen RE Hybrid was delivered successfully to the Japanese market in the form of leasing. (orig.)

(Re)politicising and (re)positioning prevention: community ...

African Journals Online (AJOL)

They also signal a need to critically re-evaluate “community mobilisation” as an AIDS prevention tradition. Intersecting social and political power dynamics play a significant role in both opening up and constraining community mobilisation efforts. This paper proposes the need for a pedagogical turn to “deep organising” and ...

Re-admissions, re-operations and length of stay in hospital after aseptic revision knee replacement in Denmark

DEFF Research Database (Denmark)

Lindberg-Larsen, M.; Jørgensen, C. C.; Hansen, Torben Bæk

2014-01-01

of hospital stay was four days (interquartile range: 3 to 5), with a 90 days re-admission rate of 9.9%, re-operation rate of 3.5% and mortality rate of 0.2%. The age ranges of 51 to 55 years (p = 0.018), 76 to 80 years (p re-admission...

Status report on seismic re-evaluation

International Nuclear Information System (INIS)

1998-01-01

In May 1997, a meeting of the PWG 3 Sub Group on the Seismic Behaviour of Structures agreed several priority objectives, of which one was the production of a status report on seismic re-evaluation. Seismic re-evaluation is identified as the process of carrying out a re-assessment of the safety of existing nuclear power plants for a specified seismic hazard. This may be necessary when no seismic hazard was considered in the original design of the plant, the relevant codes and regulations have been revised, the seismic hazard for the site has been re-assessed or there is a need to assess the capacity of the plant for severe accident conditions and behaviour beyond the design basis. Re-evaluation may also be necessary to resolve an issue, or to assess the impact of new findings or knowledge. A questionnaire on the subject was issued to all members of the Seismic Sub Group in the summer of 1997, and responses to the questionnaire had been received from most members by the end of 1997. This report is based on the responses to the questionnaire, together with comment and discussion within the group. The questionnaire covered the following main topics of interest in relation to seismic re-evaluation: General and Legislative Framework, Overall Approach, Input Definition and Analysis Methods, Scope of Plant and Assessment of As-built Situation, Assessment criteria, Outcome of Re-evaluations, Research. The responses to the questionnaire have been collated and reviewed with the objective of comparing current practice in the field of seismic re-evaluation in member countries, and a number of important points have been identified in relation to the position of seismic re-evaluation in the nuclear power industry throughout the world. It is evident that seismic re-evaluation is a relatively mature process that has been developing for some time, with most countries adopting similar practices, often based on principles which have been developed in the US nuclear industry. Seismic

Identification of a potential superhard compound ReCN

International Nuclear Information System (INIS)

Fan, Xiaofeng; Li, M.M.; Singh, David J.; Jiang, Qing; Zheng, W.T.

2015-01-01

Highlights: • We identify a new ternary compound ReCN with theoretical calculation. • The ternary compound ReCN is with two stable structures with P63mc and P3m1. • ReCN is a semiconductor from the calculation of electronic structures. • ReCN is found to possess the outstanding mechanical properties. • ReCN may be synthesized relatively easily. - Abstract: We identify a new ternary compound, ReCN and characterize its properties including structural stability and indicators of hardness using first principles calculations. We find that there are two stable structures with space groups P63mc (HI) and P3m1 (HII), in which there are no C–C and N–N bonds. Both structures, H1 and III are elastically and dynamically stable. The electronic structures show that ReCN is a semiconductor, although the parent compounds, ReC 2 and ReN 2 are both metallic. ReCN is found to possess the outstanding mechanical properties with the large bulk modulus, shear modulus and excellent ideal strengths. In addition, ReCN may perhaps be synthesized relatively easily because it becomes thermodynamic stable with respect to decomposition at very low pressures

InSpiRe - Intelligent Spine Rehabilitation

DEFF Research Database (Denmark)

Bøg, Kasper Hafstrøm; Helms, Niels Henrik; Kjær, Per

Rapport on InSpiRe-projektet: InSpiRe er et nationalt netværk, der skal fremme mulighederne for intelligent genoptræning i forhold til ryglidelser. I netværket mødes forskere, virksomheder, kiropraktorer og fysioterapeuter for at udvikle nye genoptrænings og/eller behandlingsteknologier.......Rapport on InSpiRe-projektet: InSpiRe er et nationalt netværk, der skal fremme mulighederne for intelligent genoptræning i forhold til ryglidelser. I netværket mødes forskere, virksomheder, kiropraktorer og fysioterapeuter for at udvikle nye genoptrænings og/eller behandlingsteknologier....

A new mechanism for reduced sensitivity to demethylation-inhibitor fungicides in the fungal banana black Sigatoka pathogen Pseudocercospora fijiensis

NARCIS (Netherlands)

Díaz-Trujillo, C.; Chong, P.; Stergiopoulos, I.; Meijer, H.J.G.; Wit, de P.J.G.M.; Kema, G.H.J.

2017-01-01

The Dothideomycete Pseudocercospora fijiensis, previously Mycosphaerella fijiensis, is the causal agent of black Sigatoka, one of the most destructive diseases of bananas and plantains. Disease management depends on fungicide applications with a major share for sterol demethylation-inhibitors

A new mechanism for reduced sensitivity to demethylation-inhibitor fungicides in the fungal banana black Sigatoka pathogen Pseudocercospora fijiensis

NARCIS (Netherlands)

Díaz-Trujillo, C.; Chong, P.; Stergiopoulos, I.; Meijer, H.J.G.; Wit, de P.J.G.M.; Kema, G.H.J.

2018-01-01

The Dothideomycete Pseudocercospora fijiensis, previously Mycosphaerella fijiensis, is the causal agent of black Sigatoka, one of the most destructive diseases of bananas and plantains. Disease management depends on fungicide applications with a major share for sterol demethylation-inhibitors

Concentration of 188Re-Perrhenate for Therapeutic Radiopharmaceuticals

International Nuclear Information System (INIS)

Bokhari, T.H.; Hina, S.; Ahmad, M.; Iqbal, M.

2013-01-01

Summary: Rhenium-188 (T1/2=16.9h) has great potential for a variety of therapeutic applications, including radionuclide synovectomy, oncology and bone pain palliation. The radioactive concentration of 188Re is dependent upon the specific activity of 188W, which dictates the bed size of the alumina/gel column. Due to the high content of inactive tungsten in neutron irradiated WO3, large columns containing aluminum oxide or gel are needed to prepare to double neutron capture based 188W/188Re generators that results in large elution volumes containing relatively high188W contents and low concentrations of /sup 188/ ReO/sub 4/ This decrease in specific volume of 188ReO/sub 4/ places a limitation because a high radioactive concentration of 188ReO4 - is always needed for filling angioplasty balloons or other therapeutic radiopharmaceuticals like188Re -EHDP 188Re -EDTMP, 188Re - MAG3 and 188Re -DTPA. We report post elution concentration of 188ReO4 - using in- house prepared lead cation exchange and alumina columns. Using these columns high bolus volume (10 mL saline) of 188ReO4 - can conveniently be concentrated in 1 mL of physiological saline for therapeutic use. (author)

Thermolysis of salts of [ReCl6]2- and [ReBr6]2- anions

International Nuclear Information System (INIS)

Gubanov, A.I.; Korenev, S.V.; Gromilov, S.A.; Shubin, Yu.V.

2003-01-01

Thermal decomposition of the [Pd(NH 3 ) 4 ][ReG 6 ], [Pt(NH 3 ) 4 ][ReG 6 ], (NH 4 ) 2 [ReG 6 ] complexes, where G = Cl, Br, was studied in the inert atmosphere. Certain regularities of the thermolysis were established. Finished products of the thermolysis of binary complexes in the inert atmosphere were demonstrated to be two-phase systems containing two solid solutions - one on the basis of the platinum (palladium) fcc-lattice, another - on the basis of the rhenium hcp lattice. One-phase solid palladium - rhenium solutions were established to be obtained during reduction of the studied complexes in the hydrogen atmosphere [ru

Design analysis of a Helium re-condenser

Science.gov (United States)

Muley, P. K.; Bapat, S. L.; Atrey, M. D.

2017-02-01

Modern helium cryostats deploy a cryocooler with a re-condenser at its II stage for in-situ re-condensation of boil-off vapor. The present work is a vital step in the ongoing research work of design of cryocooler based 100 litre helium cryostat with in-situ re-condensation. The cryostat incorporates a two stage Gifford McMahon cryocooler having specified refrigerating capacity of 40 W at 43 K for I stage and 1 W at 4.2 K for II stage. Although design of cryostat ensures thermal load for cryocooler below its specified refrigerating capacity at the second stage, successful in-situ re-condensation depends on proper design of re-condenser which forms the objective of this work. The present work proposes design of helium re-condenser with straight rectangular fins. Fins are analyzed for optimization of thermal performance parameters such as condensation heat transfer coefficient, surface area for heat transfer, re-condensing capacity, efficiency and effectiveness. The present work provides design of re-condenser with 19 integral fins each of 10 mm height and 1.5 mm thickness with a gap of 1.5 mm between two fins, keeping in mind the manufacturing feasibility, having efficiency of 80.96 % and effectiveness of 10.34.

India RE Grid Integration Study

Energy Technology Data Exchange (ETDEWEB)

Cochran, Jaquelin M [National Renewable Energy Laboratory (NREL), Golden, CO (United States)

2017-09-08

The use of renewable energy (RE) sources, primarily wind and solar generation, is poised to grow significantly within the Indian power system. The Government of India has established a target of 175 gigawatts (GW) of installed RE capacity by 2022, including 60 GW of wind and 100 GW of solar, up from 29 GW wind and 9 GW solar at the beginning of 2017. Thanks to advanced weather and power system modeling made for this project, the study team is able to explore operational impacts of meeting India's RE targets and identify actions that may be favorable for integration.

Combating a Global Threat to a Clonal Crop

NARCIS (Netherlands)

Arango Isaza, Rafael E.; Diaz-Trujillo, Caucasella; Dhillon, Braham; Aerts, Andrea; Carlier, Jean; Crane, Charles F.; V. de Jong, Tristan; Vries, de Ineke; Dietrich, Robert; Farmer, Andrew D.; Fortes Fereira, Claudia; Garcia, Suzana; Guzman, Mauricio; Hamelin, Richard C.; Lindquist, Erika A.; Mehrabi, Rahim; Quiros, Olman; Schmutz, Jeremy; Shapiro, Harris; Reynolds, Elizabeth; Scalliet, Gabriel; Souza, Manoel; Stergiopoulos, Ioannis; Lee, van der Theo A.J.; Wit, de Pierre J.G.M.; Zapater, Marie Françoise; Zwiers, Lute Harm; Grigoriev, Igor V.; Goodwin, Stephen B.; Kema, Gert H.J.

2016-01-01

Black Sigatoka or black leaf streak disease, caused by the Dothideomycete fungus Pseudocercospora fijiensis (previously: Mycosphaerella fijiensis), is the most significant foliar disease of banana worldwide. Due to the lack of effective host resistance, management of this disease requires

Combating a Global Threat to a Clonal Crop : Banana Black Sigatoka Pathogen Pseudocercospora fijiensis (Synonym Mycosphaerella fijiensis) Genomes Reveal Clues for Disease Control

NARCIS (Netherlands)

Arango Isaza, Rafael E.; Diaz-Trujillo, Caucasella; Dhillon, Braham; Aerts, Andrea; Carlier, Jean; Crane, Charles F.; de Jong, Tristan V.; de Vries, Ineke; Dietrich, Robert; Farmer, Andrew D.; Fereira, Claudia Fortes; Garcia, Suzana; Guzman, Mauricio; Hamelin, Richard C.; Lindquist, Erika A.; Mehrabi, Rahim; Quiros, Olman; Schmutz, Jeremy; Shapiro, Harris; Reynolds, Elizabeth; Scalliet, Gabriel; Souza, Manoel; Stergiopoulos, Ioannis; Van der Lee, Theo A. J.; De Wit, Pierre J. G. M.; Zapater, Marie-Francoise; Zwiers, Lute-Harm; Grigoriev, Igor V.; Goodwin, Stephen B.; Kema, Gert H. J.

2016-01-01

Black Sigatoka or black leaf streak disease, caused by the Dothideomycete fungus Pseudocercospora fijiensis (previously: Mycosphaerella fijiensis), is the most significant foliar disease of banana worldwide. Due to the lack of effective host resistance, management of this disease requires frequent

Simulation of the ATV Re-Entry Obsrvations

Science.gov (United States)

Bastida Virgili, B.; Krag, H.; Lips, T.; De Pasquale, E.

2010-09-01

The first ATV was launched on 9th March 2008 and, after a successful mission, the last phase was a controlled destructive re-entry on 29th September 2008, shortly after 13:30 UTC, in which the remains of the ATV and its load fell into the South Pacific Ocean. In order to better understand the re-entry processes, an insitu optical observation campaign was launched to record and analyze the ATV controlled re-entry with several instruments on board of two airplanes and also from the ISS. This observation campaign was successful and triggered several different still-ongoing studies on the extraction and analysis of data to draw conclusions on the adequacy of the re-entry break-up and explosion models used for the safety analysis of the ATV re-entry. This paper addresses the validation process for ESA’s model for re-entry survivability and on-ground risk assessment for explosive re-entry events using the observation data. The underlying rationale is to improve the models for the benefit of planning and execution of future controlled re-entries and in risk calculation in case of uncontrolled ones. The re-entry trajectory of the ATV, the explosive event and the trajectories of the fragments are simulated with the existing ESA tools and the EVOLVE explosion model. Additional software has been developed to simulate airborne sensor field of view(FOV) crossings based on the aircraft trajectories, attitude profile, sensor mounts and FOVs. Sensor performance and object radiation are modeled in order to generate synthetic images for the different sensors in the ISS and the two airplanes. These synthetic images and synthetic videos are compared with the available reentry observations of the ATV. This paper will present the software and techniques to generate synthetic imagery. It will give results of the comparison between the simulated and the real trajectories and fragmentation and explain the subsequent validation process of the ESA re-entry tools and the potential

L-acetylcarnitine enhances functional muscle re-innervation.

Science.gov (United States)

Pettorossi, V E; Brunetti, O; Carobi, C; Della Torre, G; Grassi, S

1991-01-01

The efficacy of L-acetylcarnitine and L-carnitine treatment on motor re-innervation was analyzed by evaluating different muscular parameters describing functional muscle recovery after denervation and re-innervation. The results show that L-acetylcarnitine markedly enhances functional muscle re-innervation, which on the contrary is unaffected by L-carnitine. The medial gastrocnemius muscle was denervated by cutting the nerve at the muscle entry point. After 20 days the sectioned nerve was resutured into the medial gastrocnemius muscle, and the extent of re-innervation was monitored 45 days later. L-acetylcarnitine-treated animals show significantly higher twitch and tetanic tensions of re-innervated muscle. Furthermore the results, obtained by analysing the twitch time to peak and tetanic contraction-relaxation times, suggest that L-acetylcarnitine mostly affects the functional re-innervation of slow motor units. The possible mechanisms by which L-acetylcarnitine facilitates such motor and nerve recovery are discussed.

The Chemistry of Re-188 Radiopharmaceuticals: Could Re-188 Play the Same Role in Therapy as Tc-99m in Diagnostics?

International Nuclear Information System (INIS)

Duatti, A.

2009-01-01

Radiopharmaceuticals incorporating the β-emitting radionuclide Re-188 are still attracting much interest for their potential application in nuclear medicine as therapeutic agents. There are many advantages of employing this class of radioactive compounds as briefly summarized in the following. (1) Re-188 emits a high-energy β- particle (2.1 MeV) that can be efficiently used to deliver high-dose radiation to the target. (2) Re-188 concomitantly emits a 155-keV γ photon that can be conveniently employed to obtain good-quality SPECT images of the biodistribution of Re-188 radiopharmaceuticals and, ultimately, following in vivo the course of the therapy. (3) Re-188 has a relatively short half-life (17 hours) that may allow multiple treatments of the same patient's disease. (4) Re-188 is a radiometal belonging to the same group of Tc-99m in the transition metal series of the Periodic Table, and shares with its cogener similar (though not identical) chemical properties that could be useful for designing a broad class of Re-188 radiopharmaceuticals having the same biodistribution properties of the corresponding Tc-99m analogues. (5) Similarly to Tc-99m, the radionuclide Re-188 is produced in high-specific activity through the 188 W/ 188 Re transportable generator system. A first challenge encountered in the attempt to develop efficient labeling procedures for Re-188 was related to the low radiochemical yield usually observed in tracer-level preparations of Re-188 radiopharmaceuticals starting from generator-produced [ 188 ReO 4 ]-. This drawback is commonly associated with the low value of the standard reduction potential of the tetraoxo anion as compared to the corresponding Tc-99m pertechnetate anion. In recent years, we reported a simple and efficient procedure for overcoming this problem based on a general chemical principle called 'expansion of the coordination sphere' and involving the addition to the reaction vial of an ancillary ligand (usually, chelating hard

Comparative NMR investigation of the Re-based borides

Science.gov (United States)

Lue, C. S.; Tao, Y. F.; Su, T. H.

2008-07-01

We report a systematic study of the rhenium-based borides, ReB2 , Re7B3 , and Re3B , by means of the B11 nuclear magnetic resonance (NMR) spectroscopy. While Re7B3 and Re3B are superconductors, ReB2 exhibits no superconducting signature but is of current interest due to its superhard mechanical property. Since the major focus of this investigation is their electronic characteristics in the normal states, we performed the measurements at temperatures between 77 and 295 K. For Re7B3 and Re3B , s -character electrons were found to be responsible for the observed B11 NMR Knight shift and spin-lattice relaxation rate (1/T1) . From T1 analysis, we thus deduce the partial Bs Fermi-level density of states (DOS) of both borides. On the other hand, the relaxation rate of ReB2 is mainly associated with p electrons, similar to the cases of OsB2 and RuB2 . In addition, the extracted B2p Fermi-level DOS is in good agreement with the theoretical prediction from band-structure calculations.

Voyage dans le noir. Trous noirs, matière noire, énergie noire et antimatière

CERN Multimedia

CERN. Geneva; Alvarez-Gaume, Luis; Grojean, Christophe

2009-01-01

Et si nous faisions avec les physiciens un voyage dans le noir ? De l'astrophysique à la physique des particules les trois noirs, la matière noire, l'énergie noire ou l’antimatière intriguent et fascinent. Que sont ces objets qui bousculent nos idées et qui véhiculent parfois des craintes irraisonnées? Luis Alvarez-Gaume, Michael Doser et Christophe Grojean, physiciens du CERN vous invitent à mettre en lumière (!) les constituants de base de la matière et à explorer les mystères de la physique contemporaine. Une soirée lumineuse pour éclairer des concepts et ne plus avoir peur du noir.

Allele Re-sequencing Technologies

DEFF Research Database (Denmark)

Byrne, Stephen; Farrell, Jacqueline Danielle; Asp, Torben

2013-01-01

The development of next-generation sequencing technologies has made sequencing an affordable approach for detection of genetic variations associated with various traits. However, the cost of whole genome re-sequencing still remains too high to be feasible for many plant species with large...... alternative to whole genome re-sequencing to identify causative genetic variations in plants. One challenge, however, will be efficient bioinformatics strategies for data handling and analysis from the increasing amount of sequence information....

Biomolecule labelling by 186 Re

International Nuclear Information System (INIS)

Lungu, Valeria Viorica; Mihailescu, Gabriela; Dumitrescu, Gabriela

1998-01-01

The aim of this study is to develop and improve the existing radiolabelling techniques of peptides and monoclonal antibodies with 186 Re and 188 Re as potential agents for cancer targeted radiotherapy. We selected the following methods and techniques for direct labelling of peptides and monoclonal antibody: 1. Prereduction of -S-S- bridges of biomolecule to sulfhydryls using reducing agents: ascorbic acid, cysteine, active hydrogen, 2,3 dimercaptopropanol. The prereduction reactions are controlled by massic ratios of reduction agents/biomolecule, pH, temperature and time of incubation; 2. Reduction of 186 Re O 4 - stannous chloride in acid and alkaline pH; 3. Coupling reaction of 186 Re (red) with the biomolecule controlled by the time and temperature of incubation, the influence of pH regarding the binding of 186 Re to the biomolecules. The quality control was effected by chromatography techniques (paper and elution gel chromatography) on labeled biomolecule before and after purification. The elution gel chromatography was spectrophotometricaly monitored at 280 nm. In the same time the radioactivity of samples was measured using a gamma counter. All the results confirm in vitro stability of labeled biomolecule. The biological evaluation studies regarding accumulation and biological affinity will be controlled by scintigraphy method. Biodistribution studies will be effected to Walker tumor bearing animals at 4 and 24 hours after injections. (authors)

Neutron diffraction studies on structural and magnetic properties of RE2NiGe3 (RE=La, Ce)

International Nuclear Information System (INIS)

Kalsi, Deepti; Rayaprol, S.; Siruguri, V.; Peter, Sebastian C.

2014-01-01

We report the crystallographic properties of RE 2 NiGe 3 (RE=La, Ce) synthesized by arc melting. Rietveld refinement on the powder neutron diffraction (ND) data suggest both compounds are isostructural and crystallize in the non-centrosymmetric Er 2 RhSi 3 type structure having hexagonal space group P6 ¯ 2c. In the crystal structure of RE 2 NiGe 3 , two dimensional arrangements of nickel and germanium atoms lead to the formation of hexagonal layers with rare earth atoms sandwiched between them. Magnetic susceptibility measurements performed in low fields exhibit antiferromagnetic ordering in cerium compound around (T o =) 3.2 K. Neutron diffraction measurements at 2.8 K (i.e., at TRE 2 NiGe 3 (RE=La, Ce) crystallize in the ordered superstructure of the AlB 2 type. Magnetic susceptibility measurements exhibit antiferromagnetic ordering in Ce 2 NiGe 3 . Structure and magnetism of RE 2 NiGe 3 (RE=La, Ce) are studied by neutron diffraction

The genomes of the fungal plant pathogens Cladosporium fulvum and Dothistroma septosporum reveal adaptation to different hosts and lifestyles but also signatures of common ancestry

Science.gov (United States)

We sequenced and compared the genomes of Dothideomycete fungal plant pathogens Cladosporium fulvum and Dothistroma septosporum that are related phylogenetically, but have different lifestyles and infect different hosts. C. fulvum is a biotroph that infects tomato, while D. septosporum is a hemibiotr...

Recurring Anomaly Detection System (ReADS)

Data.gov (United States)

National Aeronautics and Space Administration — Overview: ReADS can analyze text reports, such as aviation reports and problem or maintenance records. ReADS uses text clustering algorithms to group loosely related...

Familiære abdominale aortaaneurismer

DEFF Research Database (Denmark)

Mejnert Jørgensen, Trine; Lindholt, Jes S.; Høgh, Annette Langager

Formål og baggrund: Det er velkendt, at risikoen for at udvikle et abdominalt aortaaneurisme (AAA) er væsentligt forøget blandt førstegradsslægtninge til AAA-patienter, men tidligere studier er få og svært sammenlignelige, ligesom man ikke har kunnet belyse, om familiære tilfælde af AAA fremtræder...... mere aggressivt end ikke-familiære. Man ved således meget lidt om væksthastighed, prognose for ruptur, alder ved diagnose og operation og risiko for AAA-relaterede dødsfald for denne gruppe. Projektet vil forsøge at besvare følgende: Hvor stor er forekomsten af AAA blandt førstegradsslægtninge til AAA......-patienter på landsplan og er familiære tilfælde af AAA mere aggressive i form af lavere gennemsnitsalder ved diagnose og operation, hurtigere vækstrate, større rupturrisiko og højere forekomst af AAA-relaterede dødsfald end ikke-familiære AAA? Design: Projektet er et retrospektivt case-kontrolstudie, hvor man...

RE-Powering’s Electronic Decision Tree

Science.gov (United States)

Developed by US EPA's RE-Powering America's Land Initiative, the RE-Powering Decision Trees tool guides interested parties through a process to screen sites for their suitability for solar photovoltaics or wind installations

Business process re-engineering in service operations

International Nuclear Information System (INIS)

McClintock, J.W.

1995-01-01

The concept of business process re-engineering, and how it was applied to the operations of the Consumers Gas Company were discussed. Business process re-engineering was defined as the improvement of the efficiency of the customer-service process, and the overall improvement of practices and operations. The re-engineering project was said to involve a thorough analysis of information technology, current limitations, and business operational needs, undertaken on an enterprise-wide basis. Viewed generically,a re-engineering project was said to have six major components: (1) business drivers (i.e. the articulation of the Company's strategic issues); (2) benchmark measures; (3) future state process models; (4) cost/benefit analysis; (5) a change management plan; and (6) a development plan. Business improvements expected to result from the project include reduced cost of operation, reduction of waste, and a substantially complete re-design of the business process. Management of the project involved a team approach, and help of a consultant to identify the scope of the re-design, its limitations, and future state. A life expectancy of approximately 10 years was given for the re-engineering plan, with annual benefits (in terms of cost reduction) of $4.6 million by the year 2000

Space-Efficient Re-Pair Compression

DEFF Research Database (Denmark)

Bille, Philip; Gørtz, Inge Li; Prezza, Nicola

2017-01-01

Re-Pair [5] is an effective grammar-based compression scheme achieving strong compression rates in practice. Let n, σ, and d be the text length, alphabet size, and dictionary size of the final grammar, respectively. In their original paper, the authors show how to compute the Re-Pair grammar...... in expected linear time and 5n + 4σ2 + 4d + √n words of working space on top of the text. In this work, we propose two algorithms improving on the space of their original solution. Our model assumes a memory word of [log2 n] bits and a re-writable input text composed by n such words. Our first algorithm runs...

Insects and the Kafkaesque: Insectuous Re-Writings in Visual and Audio-Visual Media

Directory of Open Access Journals (Sweden)

Damianos Grammatikopoulos

2017-09-01

Full Text Available In this article, I examine techniques at work in visual and audio-visual media that deal with the creative imitation of central Kafkan themes, particularly those related to hybrid insects and bodily deformity. In addition, the opening section of my study offers a detailed and thorough discussion of the concept of the “Kafkaesque”, and an attempt will be made to circumscribe its signifying limits. The main objective of the study is to explore the relationship between Kafka’s texts and the works of contemporary cartoonists, illustrators (Charles Burns, and filmmakers (David Cronenberg and identify themes and motifs that they have in common. My approach is informed by transtextual practices and source studies, and I draw systematically on Gerard Genette’s Palimpsests and Harold Bloom’s The Anxiety of Influence.

Studies on the preparation and isomeric composition of [sup 186]Re- and [sup 188]Re-pentavalent rhenium dimercaptosuccinic acid complex

Energy Technology Data Exchange (ETDEWEB)

Singh, J. (Canterbury Univ. (United Kingdom). Biological Lab.); Reghebi, K.; Lazarus, C.R.; Clarke, S.E.M. (Guy' s Hospital, London (United Kingdom)); Callahan, A.P.; Knapp, F.F. Jr. (Oak Ridge National Lab., TN (United States)); Blower, P.J. (Kent and Canterbury Hospital (United Kingdom))

1993-03-01

The preparative conditions for [sup 186]Re(V)DMSA and [sup 188]Re(V)DMSA (DMSA = meso-dimercaptosuccinic acid), [beta]-emitting radiopharmaceuticals that have been shown to localize in medullary thyroid carcinoma, require modification depending on the amount of carrier rhenium and the chemical form and medium in which the rhenium is supplied. Preparative conditions are described for use with carrier-free [sup 188]ReO[sub 4][sup -] in saline, and for use with [sup 186]ReO[sub 4][sup -] in saline, sodium hydroxide or nitric acid. Preparation of [sup 186]Re(V)DMSA (carrier present up to 2 mg per 2.5 ml reaction volume) requires a DMSA:SnCl[sub 2]:Re ratio of 10:5:1 at 100[sup o]C for 30 min. Addition of excess nitric acid or hydrochloric acid up to a concentration of 155 mM does not reduce the yield from 100%. A commercial DMSA kit vial (e.g. Amerscan DMSA) can be used for preparation of [sup 188]Re(V)DMSA (carrier free) provided the required is in a volume of less than 1 ml per vial. A convenient method of concentrating the [sup 188]Re generator eluate to the required volume is described. (Author).

Re-irradiation for abdominal tumor. Preliminary results

International Nuclear Information System (INIS)

Narisada, Hiroyuki; Imada, Hajime; Tomoda, Yoshinori

2012-01-01

The purpose of this study was to assess the efficacy of loco-regional radiotherapy for recurrent abdominal tumor treated with re-irradiation. Re-irradiated areas of 16 patients were eight of pelvic space, five of retroperitonium and three of liver or porta hepatica. Eligibility criteria of re-irradiation were success of initial irradiation, no other effective treatment except re-irradiation, constancy of bowel gas at hunger status and respiratory movement, visceral dosage reduction at re-irradiation. Total dose of initial, second course of radiation were 51.3±10.8 Gy, 50.6±14.2 Gy, respectively. Interval of initial and second course of radiation were 16.6±10.2 months. Local control after second course of radiation was four cases of complete response, five of partial response and seven of stable disease. Median survival periods were 55 months after initial treatment and 28 months after second course of radiation. In two cases of pelvic reirradiation, skin to pelvic space fistula was occurred. Re-irradiation for abdominal tumor may become useful salvage treatment. (author)

Comparison of programmed and cabled re-entrance systems. Elaboration of cabled re-entrance system for a CII 90.40

International Nuclear Information System (INIS)

Perraudeau, Jean

1976-01-01

The objective of this research thesis is to study problems related to re-entrance, and, more particularly, to study a re-entrance system for a CII 90.40 computer. Such a system can be realised under a programmed or cabled form, and both approaches are described and compared. A generalisation of this comparison is briefly proposed. As the computer already possesses a programmed re-entrance system, the author focuses on the study of the cabled re-entrance system which results in an improvement of performance and possibilities provided by this computer, particularly for its use in real time. The design, realisation and development of such a cabled system are reported. A first part reports a theoretical study on re-entrance (definition, problems, applications), a presentation of the computer, a description of the programmed re-entrance system, a presentation of the principle of the chosen cabled re-entrance system, a definition of the structure and operating mode of the cabled pile and a description of its various components, and a flowchart analysis of function execution. The second part reports the practical realisation: definition, technological overview, technology used in the cabled pile, sequencing and multiplexing principle, impulse transmission, logical layouts, and circuit adjustments. The third part presents practical example. An assessment and perspectives are finally discussed

Onboard autonomous mission re-planning for multi-satellite system

Science.gov (United States)

Zheng, Zixuan; Guo, Jian; Gill, Eberhard

2018-04-01

This paper presents an onboard autonomous mission re-planning system for Multi-Satellites System (MSS) to perform onboard re-planing in disruptive situations. The proposed re-planning system can deal with different potential emergency situations. This paper uses Multi-Objective Hybrid Dynamic Mutation Genetic Algorithm (MO-HDM GA) combined with re-planning techniques as the core algorithm. The Cyclically Re-planning Method (CRM) and the Near Real-time Re-planning Method (NRRM) are developed to meet different mission requirements. Simulations results show that both methods can provide feasible re-planning sequences under unforeseen situations. The comparisons illustrate that using the CRM is average 20% faster than the NRRM on computation time. However, by using the NRRM more raw data can be observed and transmitted than using the CRM within the same period. The usability of this onboard re-planning system is not limited to multi-satellite system. Other mission planning and re-planning problems related to autonomous multiple vehicles with similar demands are also applicable.

Electronic structures and properties of the rhenium alkoxy derivatives Re2O3(OMe)6, Re4O6(OMe)12, and ReMoO2(OMe)7

International Nuclear Information System (INIS)

Ermakov, A.I.; Belousov, V.V.; Drobot, D.V.; Shcheglov, P.A.

2006-01-01

The geometrical structures, charge distributions, dipole moments, frequencies of normal vibrations, NMR spectra, and total energies of the chemical bonds for the rhenium alkoxy derivatives Re 2 O 3 (OMe) 6 , Re 4 O 6 (OMe) 12 , and ReMoO 2 (OMe) 7 were calculated by the DFT-B3LYP and Hartree-Fock ab initio methods based on the effective core potential theory (LANL2DZ approximation) and the semiempirical PM3(tm) method. Two optimized structures of Re 2 O 3 (OMe) 6 with close energies were found to substantially differ in geometry, 1 H, 13 C, and 17 O NMR spectra, and dipole moment. Various characteristics of the electronic structures and the trans-effect of the ligands in the compounds under consideration were discussed [ru

Existing reflection seismic data re-processing

International Nuclear Information System (INIS)

Higashinaka, Motonori; Sano, Yukiko; Kozawa, Takeshi

2005-08-01

This document is to report the results of existing seismic data re-processing around Horonobe town, Hokkaido, Japan, which is a part of the Horonobe Underground Research Project. The main purpose of this re-processing is to recognize the subsurface structure of Omagari Fault and fold system around Omagari Fault. The seismic lines for re-processing are TYHR-A3 line and SHRB-2 line, which JAPEX surveyed in 1975. Applying weathering static correction using refraction analysis and noise suppression procedure, we have much enhanced seismic profile. Following information was obtained from seismic re-processing results. TYHR-A3 line: There are strong reflections, dipping to the west. These reflections are corresponding western limb of anticline to the west side of Omagari Fault. SHRB-2 line: There are strong reflections, dipping to the west, at CDP 60-140, while there are reflections, dipping to the east, to the east side of CDP 140. These reflections correspond to the western limb and the eastern limb of the anticline, which is parallel to Omagari FAULT. This seismic re-processing provides some useful information to know the geological structure around Omagari Fault. (author)

Dissecting the Re-Os molybdenite geochronometer.

Science.gov (United States)

Barra, Fernando; Deditius, Artur; Reich, Martin; Kilburn, Matt R; Guagliardo, Paul; Roberts, Malcolm P

2017-11-22

Rhenium and osmium isotopes have been used for decades to date the formation of molybdenite (MoS 2 ), a common mineral in ore deposits and the world's main source of molybdenum and rhenium. Understanding the distribution of parent 187 Re and radiogenic daughter 187 Os isotopes in molybdenite is critical in interpreting isotopic measurements because it can compromise the accurate determination and interpretation of mineralization ages. In order to resolve the controls on the distribution of these elements, chemical and isotope mapping of MoS 2 grains from representative porphyry copper-molybdenum deposits were performed using electron microprobe and nano-scale secondary ion mass spectrometry. Our results show a heterogeneous distribution of 185,187 Re and 192 Os isotopes in MoS 2 , and that both 187 Re and 187 Os isotopes are not decoupled as previously thought. We conclude that Re and Os are structurally bound or present as nanoparticles in or next to molybdenite grains, recording a complex formation history and hindering the use of microbeam techniques for Re-Os molybdenite dating. Our study opens new avenues to explore the effects of isotope nuggeting in geochronometers.

Processing and properties of large grain (RE)BCO

International Nuclear Information System (INIS)

Cardwell, D.A.

1998-01-01

The potential of high temperature superconductors to generate large magnetic fields and to carry current with low power dissipation at 77 K is particularly attractive for a variety of permanent magnet applications. As a result large grain bulk (RE)-Ba-Cu-O ((RE)BCO) materials have been developed by melt process techniques in an attempt to fabricate practical materials for use in high field devices. This review outlines the current state of the art in this field of processing, including seeding requirements for the controlled fabrication of these materials, the origin of striking growth features such as the formation of a facet plane around the seed, platelet boundaries and (RE) 2 BaCuO 5 (RE-211) inclusions in the seeded melt grown microstructure. An observed variation in critical current density in large grain (RE)BCO samples is accounted for by Sm contamination of the material in the vicinity of the seed and with the development of a non-uniform growth morphology at ∼4 mm from the seed position. (RE)Ba 2 Cu 3 O 7-δ (RE-123) dendrites are observed to form and bro[en preferentially within the a/b plane of the lattice in this growth regime. Finally, trapped fields in excess of 3 T have been reported in irr[iated U-doped YBCO and (RE) 1+x Ba 2-x Cu 3 O y (RE=Sm, Nd) materials have been observed to carry transport current in fields of up to 10 T at 77 K. This underlines the potential of bulk (RE)BCO materials for practical permanent magnet type applications. (orig.)

BIFOCAL STEREO FOR MULTIPATH PERSON RE-IDENTIFICATION

Directory of Open Access Journals (Sweden)

G. Blott

2017-11-01

Full Text Available This work presents an approach for the task of person re-identification by exploiting bifocal stereo cameras. Present monocular person re-identification approaches show a decreasing working distance, when increasing the image resolution to obtain a higher reidentification performance. We propose a novel 3D multipath bifocal approach, containing a rectilinear lens with larger focal length for long range distances and a fish eye lens of a smaller focal length for the near range. The person re-identification performance is at least on par with 2D re-identification approaches but the working distance of the approach is increased and on average 10% more re-identification performance can be achieved in the overlapping field of view compared to a single camera. In addition, the 3D information is exploited from the overlapping field of view to solve potential 2D ambiguities.

Stability Analysis for HIFiRE Experiments

Science.gov (United States)

Li, Fei; Choudhari, Meelan M.; Chang, Chau-Lyan; White, Jeffery A.; Kimmel, Roger; Adamczak, David; Borg, Matthew; Stanfield, Scott; Smith, Mark S.

2012-01-01

The HIFiRE-1 flight experiment provided a valuable database pertaining to boundary layer transition over a 7-degree half-angle, circular cone model from supersonic to hypersonic Mach numbers, and a range of Reynolds numbers and angles of attack. This paper reports selected findings from the ongoing computational analysis of the measured in-flight transition behavior. Transition during the ascent phase at nearly zero degree angle of attack is dominated by second mode instabilities except in the vicinity of the cone meridian where a roughness element was placed midway along the length of the cone. The growth of first mode instabilities is found to be weak at all trajectory points analyzed from the ascent phase. For times less than approximately 18.5 seconds into the flight, the peak amplification ratio for second mode disturbances is sufficiently small because of the lower Mach numbers at earlier times, so that the transition behavior inferred from the measurements is attributed to an unknown physical mechanism, potentially related to step discontinuities in surface height near the locations of a change in the surface material. Based on the time histories of temperature and/or heat flux at transducer locations within the aft portion of the cone, the onset of transition correlated with a linear N-factor, based on parabolized stability equations, of approximately 13.5. Due to the large angles of attack during the re-entry phase, crossflow instability may play a significant role in transition. Computations also indicate the presence of pronounced crossflow separation over a significant portion of the trajectory segment that is relevant to transition analysis. The transition behavior during this re-entry segment of HIFiRE-1 flight shares some common features with the predicted transition front along the elliptic cone shaped HIFiRE-5 flight article, which was designed to provide hypersonic transition data for a fully 3D geometric configuration. To compare and contrast the

Framework for ReSTful Web Services in OSGi

Science.gov (United States)

Shams, Khawaja S.; Norris, Jeffrey S.; Powell, Mark W.; Crockett, Thomas M.; Mittman, David S.; Fox, Jason M.; Joswig, Joseph C.; Wallick, Michael N.; Torres, Recaredo J.; Rabe, Kenneth

2009-01-01

Ensemble ReST is a software system that eases the development, deployment, and maintenance of server-side application programs to perform functions that would otherwise be performed by client software. Ensemble ReST takes advantage of the proven disciplines of ReST (Representational State Transfer. ReST leverages the standardized HTTP protocol to enable developers to offer services to a diverse variety of clients: from shell scripts to sophisticated Java application suites

Effect of mixing RE elements (Nd, Sm, Gd, Eu, Y, Yb) on the RE2BaCuO5/Nd4-2xBa2+2xCu2-xO10-2x phases in RE cuprate high-Tc superconductors

International Nuclear Information System (INIS)

Langhorn, J.B.; Black, M.A.; McGinn, P.J.

1999-01-01

The phases RE 2 BaCuO 5 /RE 4 Ba 2 Cu 2 O 10 phases (where RE is a mixture of Nd, Sm, Gd, Eu, Y and Yb) have been synthesized in an oxygen atmosphere and subsequently characterized. The mixing of RE elements which inherently form the RE 2 BaCuO 5 phase through the peritectic decomposition of REBa 2 Cu 3 O 7-x (RE123) (i.e. Sm, Gd, Eu, Y, Yb), was observed to give homogeneous mixing of the elements in the 211 phase. In contrast it was found that on mixing Nd with other RE elements a mixture of the Nd 4-2x Ba 2+2x Cu 2-x O 10-2x (Nd422) and RE 2 BaCuO 5 (RE211) phases resulted. It was also observed that on mixing Nd with other REs a finite amount of the RE is substituted into the Nd422 phase and Nd into the RE211. (author)

Diagnostic criteria for Menière's disease.

Science.gov (United States)

Lopez-Escamez, Jose A; Carey, John; Chung, Won-Ho; Goebel, Joel A; Magnusson, Måns; Mandalà, Marco; Newman-Toker, David E; Strupp, Michael; Suzuki, Mamoru; Trabalzini, Franco; Bisdorff, Alexandre

2015-01-01

This paper presents diagnostic criteria for Menière's disease jointly formulated by the Classification Committee of the Bárány Society, The Japan Society for Equilibrium Research, the European Academy of Otology and Neurotology (EAONO), the Equilibrium Committee of the American Academy of Otolaryngology-Head and Neck Surgery (AAO-HNS) and the Korean Balance Society. The classification includes two categories: definite Menière's disease and probable Menière's disease. The diagnosis of definite Menière's disease is based on clinical criteria and requires the observation of an episodic vertigo syndrome associated with low- to medium-frequency sensorineural hearing loss and fluctuating aural symptoms (hearing, tinnitus and/or fullness) in the affected ear. Duration of vertigo episodes is limited to a period between 20 minutes and 12 hours. Probable Menière's disease is a broader concept defined by episodic vestibular symptoms (vertigo or dizziness) associated with fluctuating aural symptoms occurring in a period from 20 minutes to 24 hours.

2.2.1. Synthesis, spectroscopic characterization and crystal structure of [ReV(O2(pyz4][ReII(NOBr4(pyz] (pyz = pyrazine

Directory of Open Access Journals (Sweden)

Mario Pacheco, Alicia Cuevas, Javier González-Platas, Carlos Kremer*

2015-03-01

Full Text Available Abstract: A novel Re(V-Re(II nitrosyl complex, [Re(O2(pyz 4][Re(NOBr4(pyz] (pyz = pyrazine was prepared and characterized by X-ray diffraction, elemental analysis, infrared and ultraviolet-visible absorption spectra. This product is obtained in the initial steps of the reaction of (NBu4[Re(NOBr4(EtOH] with pyrazine. Both, the cation and the anion are mononuclear complexes. The Re(V atom in the cation is six-coordinate with four nitrogen atoms from pyrazine ligands, and two oxo ligands. The Re(II anion is also six-coordinate, with four bromide ligands, a linear nitrosyl group and one nitrogen from pyrazine. The spectroscopic studies are discussed and compared with those already reported separately for the cation and the anion. Supporting information: X-Ray (CIF file

Small Commercial Building Re-tuning: A Primer

Energy Technology Data Exchange (ETDEWEB)

Cort, Katherine A.; Hostick, Donna J.; Underhill, Ronald M.; Fernandez, Nicholas; Katipamula, Srinivas

2013-09-30

To help building owners and managers address issues related to energy-efficient operation of small buildings, DOE has developed a Small Building Re-tuning training curriculum. This "primer" provides additional background information to understand some of the concepts presented in the Small Building Re-tuning training. The intent is that those who are less familiar with the buidling energy concepts will review this material before taking the building re-tuning training class.

Photoluminescence properties of aeschynite-type LaNbTiO6:RE3+ (RE = Tb, Dy, Ho) down-converting phosphors.

Science.gov (United States)

Ma, Qian; Lu, Mengkai; Yang, Ping; Zhang, Aiyu; Cao, Yongqiang

2014-06-01

In this study, a series of LaNbTiO6:RE(3+) (RE = Tb, Dy, Ho) down-converting phosphors were synthesized using a modified sol-gel combustion method, and their photoluminescence (PL) properties were investigated as a function of activator concentration and annealing temperature. The resultant particles were characterized using X-ray diffraction, transmission electron microscopy, scanning electron microscopy, UV/Vis diffuse reflectance spectroscopy and PL spectra. The highly crystalline LaNbTiO6:RE(3+) (RE = Tb, Dy, Ho) phosphors with an average size of 200-300 nm obtained at 1100°C have an orthorhombic aeschynite-type structure and exhibit the highest luminescent intensity in our study range. The emission spectra of LaNbTiO6:RE(3+) (RE = Tb, Dy, Ho) phosphors under excitations at UV/blue sources are mainly composed of characteristic peaks arising from the f-f transitions of RE(3+), including 489 nm ((5) D4 → (7) F6) and 545 nm ((5) D4 → (7) F5) for Tb(3+), 476 and 482 nm ((4) F9/2 → (6) H15/2) and 571 nm ((4) F9/2 → (6) H13/2) for Dy(3+), and 545 nm ((5) F4 + (5) S2 → (5) I8) for Ho(3+), respectively. The luminescent mechanisms were further investigated. It can be expected that these phosphors are of intense interest and potential importance for many optical applications. Copyright © 2013 John Wiley & Sons, Ltd.

188W→188Re generator for biomedical applications

International Nuclear Information System (INIS)

Kamioki, Hiroshi; Mirzadeh, S.; Lambrecht, R.M.; Knapp, R. Jr.; Dadachova, K.

1994-01-01

An alumina-based 188 W → 188 Re generator was evaluated for 188 Re yield and elution profile and 188 W breakthrough using various reagents for a three-month period. To address the problem of low specific volume, the generator was eluted with reagents which could be easily destroyed by gentle evaporation from acidic solutions (e.g. NH 4 Cl and NH 4 NO 3 ). We also evaluated a proposed ''alumina/anion-exchange'' tandem generator for the preparation of highly purified 188 Re as perrhenic acid. In parallel studies, the adsorption dynamics of tungsten on alumina showed a sharp rise in the tungsten breakthrough at W/Al 2 O 3 ratio of ∼ 120 mg/g corresponding to a distribution constant of ∼ 8400 from nitrate solution at 0.05 M ionic strength. In adsorption on anion exchange resins, carrier-free 188 Re exhibited a behavior very similar to that of macroscopic quantities of Re. These studies further demonstrated the long and useful shelf-life of 188 W → 188 Re generator. (orig.)

Jacques Rancière and indisciplinarity

NARCIS (Netherlands)

Baronian, M.A.; Rosello, M.

2008-01-01

This is the transcript of an interview conducted with Jacques Rancière by Marie-Aude Baronian and Mireille Rosello from the University of Amsterdam and ASCA. A version of this interview was published in Dutch by Valiz (NL), in a volume of studies on Jacques Rancière that appeared in the Netherlands

Absolute counting of 188Re radiopharmaceuticals

International Nuclear Information System (INIS)

Ravindra, Anuradha; Kulkarni, D.B.; Joseph, Leena; Kulkarni, M.S.

2018-01-01

Rhenium-188 is radiopharmaceutical that belongs to the group of strong beta-weak gamma emitters. It emits high energy beta particles, (E β m ax = 2.12MeV) and weak gamma rays (E γ = 155 keV) hence makes it suitable for wide variety of therapeutic as well as diagnostic applications. Therapeutic applications include therapy of tumors, radionuclide synovectomy, bone pain palliation, intra vascular radiation therapy etc. 188 Re-labeled medicines have been employed increasingly in the therapy of tumors and vascular restenosis. To ensure that patient receives the appropriate radiation dose during the treatment, both the activity standardization and the determination of sensitivity coefficient of the secondary standard for 188 Re have become important tasks. This paper presents the methods and results obtained for the following measurements a) Standardisation of the 188 Re by using the 4π proportional counter (4πPC)-gamma extrapolation method b) Determination of sensitivity coefficient (pA/MBq) of the secondary standard ionization chamber type Centronic IG12, 20A for 188 Re

75 FR 23631 - Sugar Re-Export Program, the Sugar-Containing Products Re-Export Program, and the Polyhydric...

Science.gov (United States)

2010-05-04

... Part 1530 Sugar Re-Export Program, the Sugar-Containing Products Re-Export Program, and the Polyhydric...), Additional U.S. Note 6, which authorizes entry of raw cane sugar under subheading 1701.11.20 of the HTS for the production of polyhydric alcohols, except polyhydric alcohols for use as a substitute for sugar in...

Re-assessment of dose from the Vinten extremity dosemeter

International Nuclear Information System (INIS)

O'Hagan, J.B.; Pearson, A.J.; Dutt, J.C.

1989-01-01

A procedure is described for re-assessing the dose from the Vinten extremity dosemeter using phototransferred thermoluminescence. The technique produces a linear response up to 50 Sv. The re-assessment efficiency is approximately 10% for the first re-assessment and 3-5% for the second re-assessment. The detection threshold values (at the 95% confidence level) are 3 mSv and 9 mSv respectively. (author)

Pt, Re and Pt-Re incorporation in sulfated zirconia as catalysts for n-pentane isomerization

International Nuclear Information System (INIS)

Aboul-Gheit, A.K.; El-Desouki, D.S.; Abdel-Hamid, S.M.; Ghoneim, S.A.; Ibrahim, A.H.; Gad, F.K.; Abdel-Aleem, G.M.

2010-01-01

Two groups of modified Sulfated Zirconia (S Z) catalysts were prepared by the sol-gel method. The first group was modified by four different concentrations of Pt metal (0.15, 0.30, 0.45 and 0.60 wt %), whereas the second group contained Pt-Re combinations on SZ. All the prepared catalysts were characterized by XRD, TPR, TEM, TGA, IR spectroscopy as well as surface properties using the BET method. The catalytic activity of the catalysts was examined for the hydro isomerization of n-pentane to iso-pentane. The catalytic activity was found to increase with increasing Pt concentration in the mono metallic catalysts. The combination of Re ion with Pt on SZ results in significant changes in the characters and activities of the catalysts. The 0.45 wt % Pt + 0.15 wt % Re/SZ catalyst exhibited the highest selective compared to other metal ratios investigated

[ReF₆]^2-

DEFF Research Database (Denmark)

Pedersen, Kasper Steen; Sigrist, Marc; Sørensen, Mikkel Agerbæk

2014-01-01

studied including the slow relaxation of the magnetization observed below ca. 4 K. This slow dynamic is preserved for the one-dimensional coordination polymer [Zn(viz)4(ReF 6)]1 (2, viz=1-vinylimidazole), demonstrating the irrelevance of low symmetry for such magnetization dynamics in systems with easy......-plane-type anisotropy. The ability of fluoride to mediate significant exchange interactions is exemplified by the isostructural [Ni(viz)4(ReF6)]1 (3) analogue in which the ferromagnetic NiII-ReIV interaction (+10.8 cm-1) dwarfs the coupling present in related cyanide-bridged systems. These results reveal [ReF6...

Surface studies of Os Re W alloy-coated impregnated tungsten cathodes

International Nuclear Information System (INIS)

Ares Fang, C.S.; Maloney, C.E.

1990-01-01

Impregnated tungsten cathodes half-coated with Re/W (or Os/W) alloy and Os Re W alloy at right angles were studied to compare the effects of Os Re W alloy coatings on the electron emission and emission mechanisms. Constant surface metal compositions of 32% Os--29% Re--39% W and 35% Os--26% Re--39% W were obtained from the activated surfaces initially coated with 40% Os--40% Re--20% W and 35% Os--45% Re--20% W alloys, respectively. Thermionic emission microscopy measurements showed that the Os Re W alloy-coated surface gives an average effective work function of 0.29, 0.08, and 0.03 eV lower than the uncoated, Re/W and Os/W alloy-coated surfaces. An effective work function of 1.73 eV was obtained from an activated Os Re W alloy surface. Auger studies exhibited a smaller BaO coverage and a higher barium coverage in excess of BaO stoichiometry on the Os Re W alloy-coated surface compared to the uncoated, Re/W and Os/W alloy-coated surfaces

ASR and RE

DEFF Research Database (Denmark)

Jensen, Tim

2016-01-01

As a university discipline, the academic study of religions (ASR) has produced a critical approach to the study of religion which is (or ought be), I think, of fundamental importance for a modern secular and enlightened democratic state. However, the ”study-of-religions” approach has percolated...... with limited success into society at large as well as into the primary and secondary educational systems of Western democracies. Too often so-called religious education (RE) really is religious or confessional, and even so-called non-confessional RE is, mostly if not always, mixed with crypto......-confessional approaches, inculcation of moral values (not least those claimed to be Christian) and the promoting of religion as a resource for a more ”spiritual” approach to life. While these goals may be in line with the traditional use of the public school as the key instrument of the (nation-) state to try to confer...

Electronic structures of ReS sub 2 , ReSe sub 2 and TcS sub 2 in the real and the hypothetical undistorted structures

CERN Document Server

Fang, C M; Haas, C; Groot, R A D

1997-01-01

The transition-metal dichalcogenides ReX sub 2 (X = S or Se) and TcS sub 2 with a d sup 3 electron configuration have distorted CdCl sub 2 and Cd(OH) sub 2 structures, respectively, with the Re(Tc) atoms in each layer forming parallelogram-shaped connected clusters (diamond chain). Ab-initio band-structure calculations were performed for ReX sub 2 and TcS sub 2 , and the hypothetical undistorted 1T-TcS sub 2 and 3R-ReX sub 2 structures. The calculations show that ReS sub 2 , ReSe sub 2 and TcS sub 2 are semiconductors with energy gaps of about 1.0 eV, 0.5 eV and 0.7 eV, respectively, while for the undistorted structures the Fermi level is in the partly filled band of d sub x sub sup 2 sub - sub y sub sup 2 and d sub x sub y orbitals of the t sub 2 sub g manifold. X-ray photoemission spectra for the core levels and valence band of ReSe sub 2 and ReS sub 2 are presented. The valence x-ray photoemission spectra showed that ReS sub 2 is a p-type semiconductor with an energy gap of about 1.5 eV, while ReSe sub 2 i...

Phase characterization of Re-based diffusion barrier layer on Nb substrate

International Nuclear Information System (INIS)

Sugiarti, Eni; Wang, Youngmin; Hashimoto, Naoyuki; Ohnuki, Somei; Narita, Toshio

2011-01-01

An electron microscopy phase characterization was carried out for a Re-based diffusion barrier layer, which was deposited on the Nb substrate used as an ultra high temperature material. The coating process produced three layers; an outer Cr(Re) layer, an intermediate Cr-Nb-Re layer, and an inner Nb(Re) layer. The Cr-Nb-Re layer is considered to act as a diffusion barrier layer between the substrate and the outer Cr(Re) reservoir layer. The Cr(Re) and Nb(Re) layers are in single phase with a similar bcc structures, but they are different in structure from the intermediate layer, which is composed of a dual phase of Re 63 Cr 20 Nb 17 with a cubic structure and Nb 42 Re 33 Cr 25 with a hexagonal structure determined by transmission electron microscopy (TEM) in this study. (author)

Hydrogen-induced structural transition in single layer ReS2

Science.gov (United States)

Yagmurcukardes, M.; Bacaksiz, C.; Senger, R. T.; Sahin, H.

2017-09-01

By performing density functional theory-based calculations, we investigate how structural, electronic and mechanical properties of single layer ReS2 can be tuned upon hydrogenation of its surfaces. It is found that a stable, fully hydrogenated structure can be obtained by formation of strong S-H bonds. The optimized atomic structure of ReS2H2 is considerably different than that of the monolayer ReS2 which has a distorted-1T phase. By performing phonon dispersion calculations, we also predict that the Re2-dimerized 1T structure (called 1T {{}\\text{R{{\\text{e}}2}}} ) of the ReS2H2 is dynamically stable. Unlike the bare ReS2 the 1T {{}\\text{R{{\\text{e}}2}}} -ReS2H2 structure which is formed by breaking the Re4 clusters into separated Re2 dimers, is an indirect-gap semiconductor. Furthermore, mechanical properties of the 1T {{}\\text{R{{\\text{e}}2}}} phase in terms of elastic constants, in-plane stiffness (C) and Poisson ratio (ν) are investigated. It is found that full hydrogenation not only enhances the flexibility of the single layer ReS2 crystal but also increases anisotropy of the elastic constants.

At være optimal

DEFF Research Database (Denmark)

Holm, Karina Ellegaard; Frederiksen, Kirsten Søndergaard; Kolind, Torsten

2016-01-01

Kapitlet undersøger forholdet til fest og rus blandt unge med anden etnisk baggrund end dansk. Det er tydeligt, at alkohol, fester, rus og kropslighed opleves forskelligt blandt de interviewede; for nogle handler fest om mad, dans, musik og at gøre sig lækker, mens det for andre også handler om r...... sammen med fulde klassekammerater. Selv de få, som beretter om rusmiddelbrug, fortæller, at det foregår med målet om at være optimal....

Re-Sonification of Objects, Events, and Environments

Science.gov (United States)

Fink, Alex M.

Digital sound synthesis allows the creation of a great variety of sounds. Focusing on interesting or ecologically valid sounds for music, simulation, aesthetics, or other purposes limits the otherwise vast digital audio palette. Tools for creating such sounds vary from arbitrary methods of altering recordings to precise simulations of vibrating objects. In this work, methods of sound synthesis by re-sonification are considered. Re-sonification, herein, refers to the general process of analyzing, possibly transforming, and resynthesizing or reusing recorded sounds in meaningful ways, to convey information. Applied to soundscapes, re-sonification is presented as a means of conveying activity within an environment. Applied to the sounds of objects, this work examines modeling the perception of objects as well as their physical properties and the ability to simulate interactive events with such objects. To create soundscapes to re-sonify geographic environments, a method of automated soundscape design is presented. Using recorded sounds that are classified based on acoustic, social, semantic, and geographic information, this method produces stochastically generated soundscapes to re-sonify selected geographic areas. Drawing on prior knowledge, local sounds and those deemed similar comprise a locale's soundscape. In the context of re-sonifying events, this work examines processes for modeling and estimating the excitations of sounding objects. These include plucking, striking, rubbing, and any interaction that imparts energy into a system, affecting the resultant sound. A method of estimating a linear system's input, constrained to a signal-subspace, is presented and applied toward improving the estimation of percussive excitations for re-sonification. To work toward robust recording-based modeling and re-sonification of objects, new implementations of banded waveguide (BWG) models are proposed for object modeling and sound synthesis. Previous implementations of BWGs

STS-134 Re-Rendezvous Design History

Science.gov (United States)

Stuit, Timothy D.

2011-01-01

In preparation to provide the capability for the Orion spacecraft to rendezvous with the International Space Station (ISS), a new suite of relative navigation sensors are in development and will be tested on one of the final Space Shuttle missions to ISS. The National Aeronautics and Space Administration (NASA) commissioned a flight test of prototypes of the instruments on STS-134, in order to test their performance in the space environment during the nominal rendezvous and docking, as well as a re-rendezvous dedicated to testing the prototype sensors following the undocking of the Space Shuttle Orbiter at the end of the mission. Unlike the initial rendezvous and docking, the re-rendezvous profile would replicate the newly designed Orion coelliptic approach trajectory, something never before attempted with the Shuttle Orbiter. Therefore, there were a number of new parameters that needed to be conceived of, designed, and tested for this re-rendezvous to make the flight test successful. And all of this work had to be integrated with the normal operations of the ISS and Shuttle and had to conform to the constraints of the mission and vehicles. The result of this work is a separation and re-rendezvous trajectory design that will prove not only the design of the relative navigation sensors for the Orion vehicle, but also will serve as a proof of concept for the Orion rendezvous trajectory itself. This document presents the analysis and decision making process involved in attaining the final STS-134 re-rendezvous design.

Study on the preparation and stability of 188Re biomolecules via EHDP

International Nuclear Information System (INIS)

Ferro-Flores, G.; Garcia-Salinas, L.; Paredes-Gutierrez, L.; Hashimoto, K.; Melendez-Alafort, L.; Murphy, C.A.

2001-01-01

A direct labelling technique via ethane-1-hydroxy-1,1-diphosphonic acid (EHDP) as a weak competing ligand was developed for the preparation of several biomolecules: 188 Re-monoclonal antibody ior cea1 against carcinoembryonic antigen ( 188 Re-MoAb), biotinylated 188 Re-MoAb ( 188 Re-MoAb-biotin), 188 Re-polyclonal IgG ( 188 Re-IgG), 188 Re-peptide (somatostatine analogue peptide b-(2-naphtyl)-D-Ala-Cys-Tyr-D-Trp-Lys-Val-Cys-Thr-amide), 188 Re-MoAb fragments ( 188 Re-F(ab') 2 ) and biotinylated 188 Re-F(ab') 2 ( 188 Re-F(ab') 2 -biotin). The reaction conditions such as pH, temperature, weak ligand concentration and stannous chloride concentration were optimized during the radiolabelling of each biomolecule. Before the labelling procedure, disulphide bridge groups of the biomolecules were reduced with 2-mercaptoethanol (2-ME). To obtain 188 Re labelled antibodies and peptides in high radiochemical yields (>90%) via EHDP, it was necessary to use acidic conditions and a high concentration of stannous chloride to allow the redox reaction Re +7 →Re +5 :Re +4 . The labelling of MoAb and F(ab') 2 with 188 Re via EHDP was also evaluated employing a pretargeted technique by avidin-biotin strategy in normal mice, demonstrating that the 188 Re-labelled biotinylated antibodies are stable complexes in vivo. The 188 Re-peptide complex prepared by this method, was stable for 24 h and no radiolytic degradation was observed. (author)

Beneficial Re-use of Decommissioned Former Nuclear Facilities

International Nuclear Information System (INIS)

Boing, L.E.

1997-01-01

With the decision to decommission a nuclear facility, it is necessary to evaluate whether to fully demolish a facility or to re-use the facility in some capacity. This evaluation is often primarily driven by both the past mission of the site and the facility and the site's perceived future mission. In the case where the facility to be decommissioned is located within a large research or industrial complex and represents a significant resource to the site's future mission, it may be a perfect candidate to be re-used in some fashion. However, if the site is a rather remote older facility with little chance of being modified to today's standards for its re-use, the chances for its re-use will be substantially reduced. In this presentation, some specific cases of former nuclear facilities being decommissioned and re-used will be reviewed and some factors required to be considered in making this decision will be reviewed

A critical reassessment of cultural taxonomies in the Central European Late Palaeolithic

DEFF Research Database (Denmark)

Sauer, Florian Rudolf; Riede, Felix

2018-01-01

and economic criteria in the definition of selected groups. We subject three different archaeological taxonomic units, the Bromme culture from Denmark, the Fürstein group from Switzerland and the Atzenhof group from Germany, to particularly detailed scrutiny and highlight that the classificatory criteria used...... European Late Palaeolithic (ca. 12,000–9700 cal BC) has a long research history and many regionally and temporally specific units—groups and cultures—are recognised. In this paper, we examine the complex taxonomic landscape of this period and critically analyse the use of typological, functional...... in their definition are inconsistent across units and most likely unsuitable for circumscribing past sociocultural units. We suggest a comprehensive re-examination of the overarching taxonomic system for the Late Palaeolithic, as well as a re-evaluation of the methodologies used to delineate sociocultural units...

Defense programs business practices re-engineering QFD exercise

International Nuclear Information System (INIS)

Murray, C.; Halbleib, L.

1996-03-01

The end of the cold war has resulted in many changes for the Nuclear Weapons Complex (NWC). We now work in a smaller complex, with reduced resources, a smaller stockpile, and no new phase 3 weapons development programs. This new environment demands that we re-evaluate the way we design and produce nuclear weapons. The Defense Program (DP) Business Practices Re-engineering activity was initiated to improve the design and production efficiency of the DP Sector. The activity had six goals: (1) to identify DP business practices that are exercised by the Product Realization Process (PRP); (2) to determine the impact (positive, negative, or none) of these practices on defined, prioritized customer criteria; (3) to identify business practices that are candidates for elimination or re-engineering; (4) to select two or three business practices for re-engineering; (5) to re-engineer the selected business practices; and (6) to exercise the re-engineered practices on three pilot development projects. Business practices include technical and well as administrative procedures that are exercised by the PRP. A QFD exercise was performed to address (1)-(4). The customer that identified, defined, and prioritized the criteria to rate the business practices was the Block Change Advisory Group. Five criteria were identified: cycle time, flexibility, cost, product performance/quality, and best practices. Forty-nine business practices were identified and rated per the criteria. From this analysis, the group made preliminary recommendations as to which practices would be addressed in the re-engineering activity. Sixteen practices will be addressed in the re-engineering activity. These practices will then be piloted on three projects: (1) the Electronic Component Assembly (ECA)/Radar Project, (2) the B61 Mod 11, and (3) Warhead Protection Program (WPP)

Development of pharmaceuticals with radioactive rhenium for cancer therapy. Production of {sup 186}Re and {sup 188}Re, synthesis of labeled compounds and their biodistributions

Energy Technology Data Exchange (ETDEWEB)

NONE

1998-03-01

Production of the radioactive rhenium isotopes {sup 186}Re and {sup 188}Re, and synthesis of their labeled compounds have been studied together with the biodistributions of the compounds. This work was carried out by the Working Group on Radioactive Rhenium, consisting of researchers of JAERI and some universities, in the Subcommittee for Production and Radiolabeling under the Consultative Committee of Research on Radioisotopes. For {sup 186}Re, production methods by the {sup 185}Re(n,{gamma}){sup 186}Re reaction in a reactor and by the {sup 186}W(p,n){sup 186}Re reaction with an accelerator, which can produce nocarrier-added {sup 186}Re, have been established. For {sup 188}Re, a production method by the double neutron capture reaction of {sup 186}W, which produces a {sup 188}W/{sup 188}Re generator, has been established. For labeling of bisphosphonate, DMSA, DTPA, DADS, aminomethylenephosphonate and some monoclonal antibodies with the radioactive rhenium isotopes, the optimum conditions, including pH, the amounts of reagents and so on, have been determined for each compound. The biodistributions of each of the labeled compounds in mice have been also obtained. (author)

Image re-sampling detection through a novel interpolation kernel.

Science.gov (United States)

Hilal, Alaa

2018-06-01

Image re-sampling involved in re-size and rotation transformations is an essential element block in a typical digital image alteration. Fortunately, traces left from such processes are detectable, proving that the image has gone a re-sampling transformation. Within this context, we present in this paper two original contributions. First, we propose a new re-sampling interpolation kernel. It depends on five independent parameters that controls its amplitude, angular frequency, standard deviation, and duration. Then, we demonstrate its capacity to imitate the same behavior of the most frequent interpolation kernels used in digital image re-sampling applications. Secondly, the proposed model is used to characterize and detect the correlation coefficients involved in re-sampling transformations. The involved process includes a minimization of an error function using the gradient method. The proposed method is assessed over a large database of 11,000 re-sampled images. Additionally, it is implemented within an algorithm in order to assess images that had undergone complex transformations. Obtained results demonstrate better performance and reduced processing time when compared to a reference method validating the suitability of the proposed approaches. Copyright © 2018 Elsevier B.V. All rights reserved.

Synthesis of metallic ReO3 nanowires

International Nuclear Information System (INIS)

Myung, Dongshin; Lee, Yumin; Lee, Jaeyeon; Kim, Myung Hwa; Yu, Hak Ki; Lee, Jong-Lam; Baik, Jeong Min; Kim, Woong

2010-01-01

We present the synthesis of highly crystalline metallic rhenium trioxide (ReO 3 ) nanowires via a simple physical vapor transport at 300 C for the first time. Based on HRTEM, the ReO 3 nanowires exhibit a core of perfect cubic perovskite-type single crystal structure with a shell of thin amorphous and disordered structures of less than 2 nm in the near surface layers. Possibly this is due to proton intercalation induced by the surface reaction of single crystal ReO 3 with water. (copyright 2010 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Several new phases in RE-Mg-Ge systems (RE = rare earth metal) - syntheses, structures, and chemical bonding

International Nuclear Information System (INIS)

Suen, Nian-Tzu; Bobev, Svilen

2012-01-01

Reported are the synthesis and structural characterization of Ce_5Mg_8Ge_8 (its own structure type), CeMg_2_-_xGe_2_+_x (BaAl_4-type structure), RE_4Mg_7Ge_6 (RE = Ce-Nd, Sm; La_4Mg_7Ge_6-type structure), and RE_4Mg_5Ge_6 (RE = Ce, Pr; Tm_4Zn_5Ge_6-type structure). The structures of these compounds have been established by single-crystal and powder X-ray diffraction. These compounds are closely related to each other not only in their chemical compositions but also in their structures. A common structural feature of all are MgGe_4 tetrahedra, which are connected by corner- and/or edge-sharing into complex polyanionic frameworks with the rare-earth metal atoms filling the ''empty'' space. The structures are compared to known types of structures, and we have investigated the chemical bonding in Ce_5Mg_8Ge_8 with electronic structure calculations, which were carried out by the tight-bonding linear muffin-tin orbital (TB-LMTO) method. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Efficient Conditional Proxy Re-encryption with Chosen-Ciphertext Security

NARCIS (Netherlands)

Weng, Jiang; Yang, Yanjiang; Tang, Qiang; Deng, Robert H.; Bao, Feng

Recently, a variant of proxy re-encryption, named conditional proxy re-encryption (C-PRE), has been introduced. Compared with traditional proxy re-encryption, C-PRE enables the delegator to implement fine-grained delegation of decryption rights, and thus is more useful in many applications. In this

'If they're helping me then how can I be independent?' The perceptions and experience of users of home-care re-ablement services.

Science.gov (United States)

Wilde, Alison; Glendinning, Caroline

2012-11-01

Home-care re-ablement is a short-term, intensive service that helps people to (re-) establish their capacity and confidence in performing basic personal care and domestic tasks at home, thereby reducing needs for longer term help. Home-care re-ablement is an increasingly common feature of English adult social care services; there are similar service developments in Australia and New Zealand. This paper presents evidence from semi-structured interviews conducted in early 2010 with 34 service users and 10 carers from five established re-ablement services in England. The interviews formed part of a larger, mixed-methods study into the immediate and longer term impacts and cost-effectiveness of home-care re-ablement services. There was clear evidence that interviewees felt that they had benefitted from re-ablement services; most service users and their families valued the intervention. However, the interviews also identified potential barriers to optimal independence for some service users, particularly those with progressive conditions, sensory impairments, specific cultural needs, or who lived alone. The beneficial impacts of re-ablement could also be reduced if users failed to understand the aims of the service, or if the service failed to provide support with activities or outcomes that were particularly important to the service user or carer. Putting the lived experiences of people receiving re-ablement at the centre of analysis, this paper concludes that re-ablement services have the potential for enhanced effectiveness, particularly if there is more understanding of users' own priorities and concepts of independence. © 2012 Blackwell Publishing Ltd.

A single crystal study of RE{sub 14}Co{sub 3}In{sub 3} (RE = Y, Tb, Dy, Ho, Er)

Energy Technology Data Exchange (ETDEWEB)

Zaremba, V.I.; Kalychak, Y.M.; Dzevenko, M.V. [Inorganic Chemistry Dept., Ivan Franko National Univ. of Lviv (Ukraine); Rodewald, U.Ch.; Heying, B.; Poettgen, R. [Inst. fuer Anorganische und Analytische Chemie, Westfaelische Wilhelms-Univ. Muenster (Germany)

2006-01-01

The rare earth-cobalt-indides RE{sub 14}Co{sub 3}In{sub 3} (RE = Y, Tb, Dy, Ho, Er) were prepared in polycrystalline form from the elements by arc-melting. Small single crystals were grown through a special annealing sequence. The compounds were investigated on the basis of X-ray powder and single crystal data: Lu{sub 14}Co{sub 2}In{sub 3} (Gd{sub 14}Co{sub 3}In{sub 2.7}) type, P4{sub 2}/nmc, Z = 4, a = 959.0(1), c = 2319.1(5) pm, wR2 = 0.055, 2289 F{sup 2} values, 65 variables for Y{sub 13.90}Co{sub 2.99}In{sub 3.02}, a = 953.8(1), c = 2315.8(5) pm, wR2 = 0.108, 2357 F{sup 2} values, 65 variables for Tb{sub 13.92}Co{sub 3.01}In{sub 2.92}, a = 949.24(3), c = 2296.5(1) pm, wR2 = 0.129, 2518 F{sup 2} values, 65 variables for Dy{sub 13.90}Co{sub 2.97}In{sub 2.95}, a = 946.3(1), c = 2289.0(5) pm, wR2 = 0.099, 2297 F{sup 2} values, 64 variables for Ho{sub 14}Co{sub 2.80}In{sub 2.89}, and a = 941.0(1), c = 2274.2(5) pm, wR2 = 0.140, 2450 F{sup 2} values, 65 variables for Er{sub 13.83}Co{sub 2.88}In{sub 3.10}. All RE{sub 14}Co{sub 3}In{sub 3} indides show a small degree of In/Co mixing (between 7 and 16% Co) on the 4c In1 site and defects on the 8g Co1 positions (between 84 and 95% Co). Except for the holmium compound, the RE{sub 14}Co{sub 3}In{sub 3} intermetallics also reveal RE/In mixing on the 4c RE1 sites, leading to the refined compositions. The seven crystallographically independent RE sites have between 9 and 10 nearest RE neighbors. The RE{sub 14}Co{sub 3}In{sub 3} structures consist of a complex intergrowth of rare earth based polyhedra. Both cobalt sites have a distorted trigonal-prismatic rare earth coordination. An interesting feature is the In2-In2 dumb-bell with an In2-In2 distance of 300 pm (for Ho{sub 14}Co{sub 2.80}In{sub 2.89}). The crystal chemistry of the RE{sub 14}Co{sub 3}In{sub 3} indides is discussed. (orig.)

Hydrocarbons dating by Re-Os method: experimental study of the Re-Os couple geochemical behaviour in oils during the evolution of a petroleum system

International Nuclear Information System (INIS)

Mahdaoui, Fatima

2013-01-01

The Re-Os radiogenic system is well adapted to the dating of oils and bitumen. However the meaning of the obtained age is ambiguous. This is mainly due to gaps in our knowledge of the geochemical behavior and the speciation of Re and Os in oils. Specifically, use of the Re-Os geo-chronometer requires an understanding of how Re-Os behavior can lead to the fulfillment of the conditions necessary for the development of an isochron. These conditions are: i) the isotopic homogenization of oils at the scale of a petroleum field ii) the fractionation of Re from Os so as to obtain samples with various Re/Os ratios iii) the closure of the system during the period of radiogenic ingrowth of the daughter isotope, that is, from the time of the event of interest to the present day. Experimental investigation of the organic geochemical behavior of Re and Os in oils under various conditions, designed as analogs of the different stages of petroleum generation and evolution, were performed in order to evaluate the use of the Re-Os system as a geo-chronometer in the context of a direct use on petroleum. The possibility of Re-Os fractionation resulting from asphaltene loss during oil evolution was investigated by sequential asphaltene precipitation in the laboratory. This study determined that Re and Os are mainly located in the most polar asphaltene fractions, that is, in the first to precipitate. This study also demonstrated that Re/Os ratios are not disturbed by asphaltene loss during the evolution of oils, unless this loss is unrealistically large. Thus asphaltene precipitation during migration and emplacement is not responsible for the Re/Os fractionation required for the use of the geo-chronometer. The possibility of metal transfer from formation waters to petroleum was studied by performing contact experiments between oils and aqueous solutions of Re and Os of various concentrations over a wide range of temperatures and for varying periods of time. This study demonstrated a

An Advanced Dictionary? Similarities and Differences between Duramazwi ReChiShona and Duramazwi Guru ReChiShona *

Directory of Open Access Journals (Sweden)

Emmanuel Chabata

2011-10-01

Full Text Available

Abstract: In this article a comparative analysis of Duramazwi ReChiShona (DRC and Duramazwi Guru ReChiShona (DGC is made. Both DRC and DGC are monolingual Shona dictionaries compiled by a team of researchers under the African Languages Lexical (ALLEX Project, now the African Languages Research Institute (ALRI. During the compilation process, DRC was known as the General Shona Dictionary and DGC as the Advanced Shona Dictionary. A simple analysis of these titles shows that the dictionaries are similar in some ways and also different in others. The writer tries to show the ways in which DGC is regarded as a more advanced dictionary when compared to DRC. Although the argument of the article is mainly built on those differences which make DGC the more advanced, attention is also paid to the similarities between the dictionaries.

Keywords: ALLEX PROJECT, ALRI, DURAMAZWI RECHISHONA, DURAMAZWI GURU RECHISHONA, DICTIONARY, SHONA, HEADWORD, SENSE, MONOLINGUAL DICTIONARY, CORPUS, IDIOM, PROVERB, PITHY SAYING

Opsomming: 'n Gevorderde woordeboek? Ooreenkomste en verskille tussen Duramazwi ReChiShona en Duramazwi Guru ReChiShona. In hierdie artikel word 'n vergelykende ontleding van Duramazwi ReChiShona (DRC en Duramazwi Guru ReChiShona (DGC gemaak. Sowel die DRC en DGC is eentalige Sjonawoordeboeke, saamgestel deur ?n span navorsers by die African Languages Lexical (ALLEX Project, tans die African Languages Research Institute (ALRI. Gedurende die samestellingsproses was DRC bekend as die Algemene Sjonawoordeboek en DGC as die Gevorderde Sjonawoordeboek. 'n Eenvoudige ontleding van hierdie titels toon dat die woordeboeke op sommige maniere eenders en op ander ook verskillend is. Die skrywer probeer die maniere aantoon waarop DGC beskou word as 'n meer gevorderde woordeboek wanneer dit met DRC vergelyk word. Alhoewel die argument van die artikel hoofsaaklik gebou is op daardie verskille wat DGC die gevorderdste maak, word ook aandag gegee aan

Didactical formulation of the Ampère law

International Nuclear Information System (INIS)

Barchiesi, Dominique

2014-01-01

The Ampère law is useful to calculate the magnetostatic field in the cases of distributions of current with high degree of symmetry. Nevertheless the magnetic field produced by a thin straight wire carrying a current I requires the Biot–Savart law and the use of the Ampère law leads to a mistake. A didactical formulation of the Ampère law is proposed to prevent misinterpretations. (letters and comments)

Refinement of the Al-rich part of the Al–Cu–Re phase diagram and atomic model of the ternary Al{sub 6.2}Cu{sub 2}Re phase

Energy Technology Data Exchange (ETDEWEB)

Samuha, S. [Department of Materials Engineering, Ben Gurion University of the Negev, Beer Sheva 84105 (Israel); NRCN, P.O. Box 9001, Beer Sheva 84190 (Israel); Grushko, B. [MaTecK, Jülich D 52428 (Germany); PGI-5, Forschungszentrum Jülich, Jülich D 52425 (Germany); Meshi, L., E-mail: Louisa@bgu.ac.il [Department of Materials Engineering, Ben Gurion University of the Negev, Beer Sheva 84105 (Israel); Ilse Katz Institute for Nanoscale Science & Technology, Ben Gurion University of the Negev, Beer Sheva 84105 (Israel)

2016-06-15

Partial isothermal sections at 800, 650 and 590 °C were constructed for an Al-rich compositional range of Al–Cu–Re. The maximal solubility of Cu in the Al{sub 11}Re{sub 4}, h-Al{sub 4}Re and l-Al{sub 4}Re phases was found to be ∼6, 4.5, and 2.3 at% respectively, while the solubility of Re in the Al–Cu θ, η{sub 1} and ε{sub 2} phases was below 0.5 at%. Below 740 °C, a ternary hexagonal phase (P6{sub 3}, a = 1.1029 and c = 1.2746 nm) is formed in a small compositional range close to Al{sub 65}Cu{sub 25}Re{sub 10}. Its structural model was deduced by direct methods applied on the precession electron diffraction tomography data. - Highlights: • Al–Cu–Re was studied at 540–1030 °C up to 25 at% Re and 60 at% Cu. • Al{sub 11}Re{sub 4}, h-Al{sub 4}Re and l-Al{sub 4}Re dissolve 6, 4.5 and 2.3 at% Cu, respectively. • Earlier reported ternary compound Al{sub 8}CuRe was not confirmed. • Earlier reported ternary compound Al{sub 7}Cu{sub 2}Re is probably Al{sub 6.2}Cu{sub 2}Re. • Crystal structure of hexagonal Al{sub 6.2}Cu{sub 2}Re was solved.

Cette étrange matière

CERN Document Server

Kastler, Alfred

1976-01-01

La matière nous est connue et jusque dans sa structure intime : l'aspect qu'offre le monde industrialisé en est une preuve suffisante, la bombe atomique ou à hydrogène, un signe spectaculaire. Pourtant, selon Alfred Kastler, dont le témoignage en pareil domaine fait naturellement autorité, la matière mérite plus encore d'être appelée "étrange".

Complexation of 188Re-phosphonates: in vitro and in vivo studies

International Nuclear Information System (INIS)

Faintuch, B.L.; Muramoto, E.; Faintuch, S.

2003-01-01

MDP (methylenediphosphonate) and HEDP (hydroxyethylidene diphosphonate), both disphosphonates, and EDTMP (ethylenediamine tetramethylene phosphonic acid), a tetraphosphonate ligand, have been previously labeled with 188 Re for use in metastatic bone-pain palliation. The aim of this study was a comparison between the three complexes 188 Re-MDP, 188 Re-HEDP and 188 Re-EDTMP concerning the complexation conditions, in order to achieve maximum yield, stability and bone uptake. Methods: MDP was dissolved in water and HEDP and EDTMP were dissolved in NaOH 1 N followed by reduction of pH with HCl 1 N. To all mixtures stannous chloride and 188 ReO 4 - were added in a nitrogen atmosphere. The preparations were heated in boiling water bath for 15 min. Yield as well as radiochemical stability was estimated by ITLC. Different concentrations of phosphonates and stannous chloride were evaluated. Biodistribution studies in Swiss mice were done for the three 188 Re-phosphonates that presented the best radiochemical yield. The optimal ligand concentration for maximum complexation was 85.2 mM for MDP, 72.8 mM for HEDP and 45.8 mM for EDTMP. The best amount of SnCl 2 .2H 2 O was 1.5 mg/mL for 188 Re-HEDP and 1 mg/mL for both 188 Re-MDP and 188 Re-EDTMP. In these conditions the three complexes showed a complexation rate above 95%. Reasonable radiochemical stability for 24 hours was achieved by 188 Re-EDTMP when employing ascorbic acid. All products showed a great uptake by the kidneys. 188 Re-EDTMP had the greatest uptake by femur (3.1 ± 0.2% ID/g) followed by 188 Re-MDP (1.2 ± 0.1% ID/g) and 188 Re-HEDP (1.0 ± 0.1% ID/g), 4 hours post injection. 188 Re-EDTMP displayed a femur bone/muscle ratio of 28.5, 188 Re-MDP 4.9 and 188 Re-HEDP 4.9. In conclusion 188 Re-EDTMP demonstrated the best potential as a radiopharmaceutical for bone cancer pain relief, encouraging further dosimetric studies and clinical trials. (orig.)

Suddenly included: cultural differences in experiencing re-inclusion.

Science.gov (United States)

Pfundmair, Michaela; Graupmann, Verena; Du, Hongfei; Frey, Dieter; Aydin, Nilüfer

2015-03-01

In the current research, we examined whether re-inclusion (i.e. the change from a previous state of exclusion to a new state of inclusion) was perceived differently by people with individualistic and collectivistic cultural backgrounds. Individualists (German and Austrian participants) but not collectivists (Chinese participants) experienced re-inclusion differently than continued inclusion: While collectivistic participants did not differentiate between both kinds of inclusion, individualistic participants showed reduced fulfilment of their psychological needs under re-inclusion compared to continued inclusion. The results moreover revealed that only participants from individualistic cultures expressed more feelings of exclusion when re-included than when continually included. These exclusionary feelings partially mediated the relationship between the different states of inclusion and basic need fulfilment. © 2014 International Union of Psychological Science.

Experimental determination of the hydrothermal solubility of ReS2 and the Re–ReO2 buffer assemblage and transport of rhenium under supercritical conditions

Directory of Open Access Journals (Sweden)

Wood Scott A

2002-01-01

Full Text Available To understand the aqueous species important for transport of rhenium under supercritical conditions, we conducted a series of solubility experiments on the Re–ReO2 buffer assemblage and ReS2. In these experiments, pH was buffered by the K–feldspar–muscovite–quartz assemblage; in sulfur-free systems was buffered by the Re–ReO2 assemblage; and and in sulfur-containing systems were buffered by the magnetite–pyrite–pyrrhotite assemblage. Our experimental studies indicate that the species ReCl40 is dominant at 400°C in slightly acidic to near-neutral, and chloride-rich (total chloride concentrations ranging from 0.5 to 1.0 M environments, and ReCl3+ may predominate at 500°C in a solution with total chloride concentrations ranging from 0.5 to 1.5 M. The results also demonstrate that the solubility of ReS2 is about two orders of magnitude less than that of ReO2. This finding not only suggests that ReS2 (or a ReS2 component in molybdenite is the solubility-controlling phase in sulfur-containing, reducing environments but also implies that a mixing process involving an oxidized, rhenium-containing solution and a solution with reduced sulfur is one of the most effective mechanisms for deposition of rhenium. In analogy with Re, TcS2 may be the stable Tc-bearing phase in deep geological repositories of radioactive wastes.

Need for re-skilltraining towards make in India initiative

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Anita Singh

2016-12-01

Full Text Available With rapid change in global environment and technology, Indian corporate and industry is facing a big hurdle to fill existing jobs due to shortage of skilled manpower. To fill this gap the government has taken ‘Make in India’ initiative for skilling and re skilling manpower. Most of the Indian IT companies have shifted their focus from hiring to training and re skilling their employees at every level to match the needs of their client and make the organization cost effective. Training brings about attitudinal changes, improves skill, and there by improves job performance. The study attempts to understand attitude of employees towards imparting Re Skilling Training program, whether employees feels that re-skilling training is necessary or they are burdened by it. The basic focus of this paper is to identify the factor that influence employees attitude towards re-skilling. A survey is conducted to attain the objectives of the research. Respondents are the employees working in IT sector. Finding of the study includes that employees agree that re-killing is important for job growth and it also helps them in learning new technology and skills .They are of the opinion that re skilling provides them with better growth opportunities and enhances overall performance of the organization.

Seismic re-evaluation of French nuclear power plants

International Nuclear Information System (INIS)

Andrieu, R.

1995-01-01

After a presentation of the seismic inputs which have been taken into account in the design of the French Nuclear Power Plants, the re-assessed values of these inputs are shown. Some considerations about the specificity of the French PWR program with regard to the standardisation of plants are given together with the present objectives of seismic re-evaluations. Finally the main results of the seismic re-analysis being performed for the Phenix Fast Reactor are considered. (author)

Thermal expansion and conductivity of RE2Sn2O7 (RE = La, Nd, Sm, Gd, Er and Yb) pyrochlores

International Nuclear Information System (INIS)

Feng, J.; Xiao, B.; Zhou, R.; Pan, W.

2013-01-01

Graphical abstract: Calculated cohesive energies and formation enthalpies of RE 2 Sn 2 O 7 compounds. The formation enthalpies at 298 K are more close to the experimental values. -- The calculated cohesive energies and formation enthalpies of Rare earth stannate (RE 2 Sn 2 O 7 ) compounds are in good agreement with the corresponding experimental values. The thermal expansion coefficients (TECs) of rare earth stannates are 7–9 × 10 −6 K −1 at high temperature. The results show that local spin density approximation predicts smaller TECs than the real values. The computed thermal conductivity of RE 2 Sn 2 O 7 is 1.8–2.5 W (m · K) −1 at 1273 K using the Slack–Clarke model, indicating that RE 2 Sn 2 O 7 compounds exhibit good thermal insulating properties at high temperature

188W/188Re Generator System and Its Therapeutic Applications

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A. Boschi

2014-01-01

Full Text Available The 188Re radioisotope represents a useful radioisotope for the preparation of radiopharmaceuticals for therapeutic applications, particularly because of its favorable nuclear properties. The nuclide decay pattern is through the emission of a principle beta particle having 2.12 MeV maximum energy, which is enough to penetrate and destroy abnormal tissues, and principle gamma rays (Eγ=155 keV, which can efficiently be used for imaging and calculations of radiation dose. 188Re may be conveniently produced by 188W/188Re generator systems. The challenges related to the double neutron capture reaction route to provide only modest yield of the parent 188W radionuclide indeed have been one of the major issues about the use of 188Re in nuclear medicine. Since the specific activity of 188W used in the generator is relatively low (<185 GBq/g, the eluted Re188O4- can have a low radioactive concentration, often ineffective for radiopharmaceutical preparation. However, several efficient postelution concentration techniques have been developed, which yield clinically useful Re188O4- solutions. This review summarizes the technologies developed for the preparation of 188W/188Re generators, postelution concentration of the 188Re perrhenate eluate, and a brief discussion of new chemical strategies available for the very high yield preparation of 188Re radiopharmaceuticals.

Person Re-Identification by Camera Correlation Aware Feature Augmentation.

Science.gov (United States)

Chen, Ying-Cong; Zhu, Xiatian; Zheng, Wei-Shi; Lai, Jian-Huang

2018-02-01

The challenge of person re-identification (re-id) is to match individual images of the same person captured by different non-overlapping camera views against significant and unknown cross-view feature distortion. While a large number of distance metric/subspace learning models have been developed for re-id, the cross-view transformations they learned are view-generic and thus potentially less effective in quantifying the feature distortion inherent to each camera view. Learning view-specific feature transformations for re-id (i.e., view-specific re-id), an under-studied approach, becomes an alternative resort for this problem. In this work, we formulate a novel view-specific person re-identification framework from the feature augmentation point of view, called Camera coR relation Aware Feature augmenTation (CRAFT). Specifically, CRAFT performs cross-view adaptation by automatically measuring camera correlation from cross-view visual data distribution and adaptively conducting feature augmentation to transform the original features into a new adaptive space. Through our augmentation framework, view-generic learning algorithms can be readily generalized to learn and optimize view-specific sub-models whilst simultaneously modelling view-generic discrimination information. Therefore, our framework not only inherits the strength of view-generic model learning but also provides an effective way to take into account view specific characteristics. Our CRAFT framework can be extended to jointly learn view-specific feature transformations for person re-id across a large network with more than two cameras, a largely under-investigated but realistic re-id setting. Additionally, we present a domain-generic deep person appearance representation which is designed particularly to be towards view invariant for facilitating cross-view adaptation by CRAFT. We conducted extensively comparative experiments to validate the superiority and advantages of our proposed framework over state

PSpectRe: a pseudo-spectral code for (P)reheating

International Nuclear Information System (INIS)

Easther, Richard; Finkel, Hal; Roth, Nathaniel

2010-01-01

PSpectRe is a C++ program that uses Fourier-space pseudo-spectral methods to evolve interacting scalar fields in an expanding universe. PSpectRe is optimized for the analysis of parametric resonance in the post-inflationary universe and provides an alternative to finite differencing codes, such as Defrost and LatticeEasy. PSpectRe has both second- (Velocity-Verlet) and fourth-order (Runge-Kutta) time integrators. Given the same number of spatial points and/or momentum modes, PSpectRe is not significantly slower than finite differencing codes, despite the need for multiple Fourier transforms at each timestep, and exhibits excellent energy conservation. Further, by computing the post-resonance equation of state, we show that in some circumstances PSpectRe obtains reliable results while using substantially fewer points than a finite differencing code. PSpectRe is designed to be easily extended to other problems in early-universe cosmology, including the generation of gravitational waves during phase transitions and pre-inflationary bubble collisions. Specific applications of this code will be described in future work

A study of factors affecting the labelling of tartrate with 188Re and the transchelation of the 188Re from the tartrate to a protein

International Nuclear Information System (INIS)

Sailerova, Eva; Billinghurst, M.W.

2003-01-01

The formation of 188 Re-tartrate for use in transchelation reactions and the transchelation of the 188 Re onto albumin was studied. Two labelled tartrate products were separated using a non-traditional mobile phase on ITLC strips. Tartrate labelling yield increases with pH but so does the instability when the product is exposed to air. Lower pH's are preferred when oxygen-free labelling conditions can be achieved. Higher tin levels protect against air oxidation. Stability of the Re-tartrate complex is supported by addition of ascorbic acid and ferrous sulphate, however both these agents decreased the rate of the formation of the Re-tartrate complex. The labelling efficiency of a perrhenate solution decreased with the time for which it is stored prior to the labelling reaction, depending on the radioactive concentration. Re-albumin transchelation efficiency increases with the tartrate concentration, while increased stability of the Re-tartrate complex lowers the transchelation yields of Re-albumin

Combating a Global Threat to a Clonal Crop: Banana Black Sigatoka Pathogen Pseudocercospora fijiensis (Synonym Mycosphaerella fijiensis) Genomes Reveal Clues for Disease Control.

Science.gov (United States)

Arango Isaza, Rafael E; Diaz-Trujillo, Caucasella; Dhillon, Braham; Aerts, Andrea; Carlier, Jean; Crane, Charles F; V de Jong, Tristan; de Vries, Ineke; Dietrich, Robert; Farmer, Andrew D; Fortes Fereira, Claudia; Garcia, Suzana; Guzman, Mauricio; Hamelin, Richard C; Lindquist, Erika A; Mehrabi, Rahim; Quiros, Olman; Schmutz, Jeremy; Shapiro, Harris; Reynolds, Elizabeth; Scalliet, Gabriel; Souza, Manoel; Stergiopoulos, Ioannis; Van der Lee, Theo A J; De Wit, Pierre J G M; Zapater, Marie-Françoise; Zwiers, Lute-Harm; Grigoriev, Igor V; Goodwin, Stephen B; Kema, Gert H J

2016-08-01

Black Sigatoka or black leaf streak disease, caused by the Dothideomycete fungus Pseudocercospora fijiensis (previously: Mycosphaerella fijiensis), is the most significant foliar disease of banana worldwide. Due to the lack of effective host resistance, management of this disease requires frequent fungicide applications, which greatly increase the economic and environmental costs to produce banana. Weekly applications in most banana plantations lead to rapid evolution of fungicide-resistant strains within populations causing disease-control failures throughout the world. Given its extremely high economic importance, two strains of P. fijiensis were sequenced and assembled with the aid of a new genetic linkage map. The 74-Mb genome of P. fijiensis is massively expanded by LTR retrotransposons, making it the largest genome within the Dothideomycetes. Melting-curve assays suggest that the genomes of two closely related members of the Sigatoka disease complex, P. eumusae and P. musae, also are expanded. Electrophoretic karyotyping and analyses of molecular markers in P. fijiensis field populations showed chromosome-length polymorphisms and high genetic diversity. Genetic differentiation was also detected using neutral markers, suggesting strong selection with limited gene flow at the studied geographic scale. Frequencies of fungicide resistance in fungicide-treated plantations were much higher than those in untreated wild-type P. fijiensis populations. A homologue of the Cladosporium fulvum Avr4 effector, PfAvr4, was identified in the P. fijiensis genome. Infiltration of the purified PfAVR4 protein into leaves of the resistant banana variety Calcutta 4 resulted in a hypersensitive-like response. This result suggests that Calcutta 4 could carry an unknown resistance gene recognizing PfAVR4. Besides adding to our understanding of the overall Dothideomycete genome structures, the P. fijiensis genome will aid in developing fungicide treatment schedules to combat this

Bioinformatics Prediction of Polyketide Synthase Gene Clusters from Mycosphaerella fijiensis.

Science.gov (United States)

Noar, Roslyn D; Daub, Margaret E

2016-01-01

Mycosphaerella fijiensis, causal agent of black Sigatoka disease of banana, is a Dothideomycete fungus closely related to fungi that produce polyketides important for plant pathogenicity. We utilized the M. fijiensis genome sequence to predict PKS genes and their gene clusters and make bioinformatics predictions about the types of compounds produced by these clusters. Eight PKS gene clusters were identified in the M. fijiensis genome, placing M. fijiensis into the 23rd percentile for the number of PKS genes compared to other Dothideomycetes. Analysis of the PKS domains identified three of the PKS enzymes as non-reducing and two as highly reducing. Gene clusters contained types of genes frequently found in PKS clusters including genes encoding transporters, oxidoreductases, methyltransferases, and non-ribosomal peptide synthases. Phylogenetic analysis identified a putative PKS cluster encoding melanin biosynthesis. None of the other clusters were closely aligned with genes encoding known polyketides, however three of the PKS genes fell into clades with clusters encoding alternapyrone, fumonisin, and solanapyrone produced by Alternaria and Fusarium species. A search for homologs among available genomic sequences from 103 Dothideomycetes identified close homologs (>80% similarity) for six of the PKS sequences. One of the PKS sequences was not similar (< 60% similarity) to sequences in any of the 103 genomes, suggesting that it encodes a unique compound. Comparison of the M. fijiensis PKS sequences with those of two other banana pathogens, M. musicola and M. eumusae, showed that these two species have close homologs to five of the M. fijiensis PKS sequences, but three others were not found in either species. RT-PCR and RNA-Seq analysis showed that the melanin PKS cluster was down-regulated in infected banana as compared to growth in culture. Three other clusters, however were strongly upregulated during disease development in banana, suggesting that they may encode

Combating a Global Threat to a Clonal Crop: Banana Black Sigatoka Pathogen Pseudocercospora fijiensis (Synonym Mycosphaerella fijiensis Genomes Reveal Clues for Disease Control.

Directory of Open Access Journals (Sweden)

Rafael E Arango Isaza

2016-08-01

Full Text Available Black Sigatoka or black leaf streak disease, caused by the Dothideomycete fungus Pseudocercospora fijiensis (previously: Mycosphaerella fijiensis, is the most significant foliar disease of banana worldwide. Due to the lack of effective host resistance, management of this disease requires frequent fungicide applications, which greatly increase the economic and environmental costs to produce banana. Weekly applications in most banana plantations lead to rapid evolution of fungicide-resistant strains within populations causing disease-control failures throughout the world. Given its extremely high economic importance, two strains of P. fijiensis were sequenced and assembled with the aid of a new genetic linkage map. The 74-Mb genome of P. fijiensis is massively expanded by LTR retrotransposons, making it the largest genome within the Dothideomycetes. Melting-curve assays suggest that the genomes of two closely related members of the Sigatoka disease complex, P. eumusae and P. musae, also are expanded. Electrophoretic karyotyping and analyses of molecular markers in P. fijiensis field populations showed chromosome-length polymorphisms and high genetic diversity. Genetic differentiation was also detected using neutral markers, suggesting strong selection with limited gene flow at the studied geographic scale. Frequencies of fungicide resistance in fungicide-treated plantations were much higher than those in untreated wild-type P. fijiensis populations. A homologue of the Cladosporium fulvum Avr4 effector, PfAvr4, was identified in the P. fijiensis genome. Infiltration of the purified PfAVR4 protein into leaves of the resistant banana variety Calcutta 4 resulted in a hypersensitive-like response. This result suggests that Calcutta 4 could carry an unknown resistance gene recognizing PfAVR4. Besides adding to our understanding of the overall Dothideomycete genome structures, the P. fijiensis genome will aid in developing fungicide treatment schedules

Bioinformatics Prediction of Polyketide Synthase Gene Clusters from Mycosphaerella fijiensis.

Directory of Open Access Journals (Sweden)

Roslyn D Noar

Full Text Available Mycosphaerella fijiensis, causal agent of black Sigatoka disease of banana, is a Dothideomycete fungus closely related to fungi that produce polyketides important for plant pathogenicity. We utilized the M. fijiensis genome sequence to predict PKS genes and their gene clusters and make bioinformatics predictions about the types of compounds produced by these clusters. Eight PKS gene clusters were identified in the M. fijiensis genome, placing M. fijiensis into the 23rd percentile for the number of PKS genes compared to other Dothideomycetes. Analysis of the PKS domains identified three of the PKS enzymes as non-reducing and two as highly reducing. Gene clusters contained types of genes frequently found in PKS clusters including genes encoding transporters, oxidoreductases, methyltransferases, and non-ribosomal peptide synthases. Phylogenetic analysis identified a putative PKS cluster encoding melanin biosynthesis. None of the other clusters were closely aligned with genes encoding known polyketides, however three of the PKS genes fell into clades with clusters encoding alternapyrone, fumonisin, and solanapyrone produced by Alternaria and Fusarium species. A search for homologs among available genomic sequences from 103 Dothideomycetes identified close homologs (>80% similarity for six of the PKS sequences. One of the PKS sequences was not similar (< 60% similarity to sequences in any of the 103 genomes, suggesting that it encodes a unique compound. Comparison of the M. fijiensis PKS sequences with those of two other banana pathogens, M. musicola and M. eumusae, showed that these two species have close homologs to five of the M. fijiensis PKS sequences, but three others were not found in either species. RT-PCR and RNA-Seq analysis showed that the melanin PKS cluster was down-regulated in infected banana as compared to growth in culture. Three other clusters, however were strongly upregulated during disease development in banana, suggesting that

Nye militære trends i den syriske borgerkrig

DEFF Research Database (Denmark)

Engen, Torben Toftgaard; Kjellund, Jon

2018-01-01

I den flerårige syriske borgerkrig har der fundet tre nye militære trends sted, der peger imod, at fremtidens landmilitære kampplads vil være væsensforskellig fra indsatserne i Irak og Afghanistan. Denne rapport analyserer de tre trends inden for digitaliseringen af den hybride krigsførelse og ka...

Seismic re-evaluation process in Medzamor-2 NPP

International Nuclear Information System (INIS)

Zadoyan, P.

2000-01-01

Seismic re-evaluation process for Medzamor-2 NPP describes the following topics: program implementation status; re-evaluation program structure; regulatory procedure and review plan; current tasks and practice; and regulatory assessment and research programs

The heterothallic sugarbeet pathogen Cercospora beticola contains exon fragments of both MAT genes that are homogenized by concerted evolution

NARCIS (Netherlands)

Bolton, M.D.; Jonge, de R.; Inderbitzin, P.; Liu, Z.; Birla, K.; Peer, Van de Y.; Subbarao, K.; Thomma, B.P.H.J.; Secor, G.

2014-01-01

Dothideomycetes is one of the most ecologically diverse and economically important classes of fungi. Sexual reproduction in this group is governed by mating type (MAT) genes at the MAT1 locus. Self-sterile (heterothallic) species contain one of two genes at MAT1 (MAT1-1-1 or MAT1-2-1) and only

Strain induced optical properties of BaReO3

Science.gov (United States)

Kumavat, Sandip R.; Kansara, Shivam; Gupta, Sanjeev K.; Sonvane, Yogesh

2018-05-01

Here, we have performed strain induce optical properties of BaReO3 by using density functional theory (DFT). We noticed that after applying intrinsic and extrinsic strain to the BaReO3, it shows the metallic behavior. We also studied optical properties, which show good activity in the ultraviolet region. The results show that after applying intrinsic and extrinsic strain to BaReO3 the absorption peaks are shifted towards the high UV region of the spectrum. Thus, we concluded that, BaReO3 material with extrinsic strain can be useful for high frequency UV device and optoelectronic devices.

Re-evaluation of atomic bomb radiation

International Nuclear Information System (INIS)

Okajima, Shunzo

1984-01-01

The background and current status of the re-evaluation of atomic bomb (A-bomb) radiation doses are presented. Problems in re-evaluating radiation doses are discussed: spectra of gamma-rays and neutrons emitted in the air, A-bomb structures, and meterological elements should be taken into account. In Japan, in an attempt to estimate A-bomb radiation doses, radioactive residues contained in roof tiles, bricks, rocks, and teeth and shell button of clothes are being actually measured. (Namekawa, K.)

Irradiation induced precipitation in tungsten based, W-Re alloys

Science.gov (United States)

Williams, R. K.; Wiffen, F. W.; Bentley, J.; Stiegler, J. O.

1983-03-01

Tungsten-base alloys containing 5, 11, and 25 pct Re were irradiated in the EBR-II reactor. Irradiation temperatures ranged from 600 to 1500 °C. All compositions were irradiated to fluences in the range 4.3 to 6.1 X 1025 n/m2 (E > 0.1 MeV), and three 25 pct Re samples were also irradiated to 3.7 X 1026 n/m2 at temperatures 700 to 900 °C. Postirradiation examination included measurement of electrical resistivity at room temperature and lower temperatures, X-ray diffraction, optical metallography, microprobe analysis, and transmission electron microscopy. Irradiation induced resistivity decreases observed in most of the samples suggested second-phase precipitation. Complete results confirmed the precipitate formation in all samples, in disagreement with existing phase diagrams for the W-Re system. Electron diffraction showed the precipitates to be consistent with the cubic, Re-rich X-phase and inconsistent with the σ-phase. Large variations in precipitate morphology and distribution were observed between the different compositions and irradiation conditions. For the 5 and 11 pct Re-alloys, spherically symmetric strain fields surrounded the equiaxed precipitate particles, and were observed even where no particles were visible. These strain fields are believed to arise from local Re enrichment. Thermoelectric data show that the precipitation can lead to decalibration of W/Re thermocouples.

A study of the Al-rich part of the Al-Re alloy system

International Nuclear Information System (INIS)

Balanetskyy, S.; Grushko, B.

2008-01-01

The Al-rich part of the Al-Re phase diagram was reinvestigated by scanning and transmission electron microscopy, powder X-ray diffraction and differential thermal analysis. The earlier reported Al 12 Re, Al 6 Re, and Al 11 Re 4 phases were confirmed. Close to the Al 4 Re composition a high-temperature h-Al 4 Re and a low-temperature l-Al 4 Re phase were found to be formed at slightly different compositions. Both exhibited compositional ranges. A new phase was revealed close to the Al 3 Re composition. The Al 11 Re 4 phase is formed congruently at 1650 deg. C, Al 3 Re peritectically at 1610 deg. C, h-Al 4 Re peritectically at 1410 deg. C, l-Al 4 Re peritectically at ∼1000 deg. C, Al 6 Re peritectically at 813 deg. C and Al 12 Re peritectically at 746 deg. C. Finally, the Al 12 Re-(Al) eutectic is formed at 658 deg. C. The Al 3 Re and h-Al 4 Re are decomposed by eutectoid reactions at ∼946 and 833 deg., respectively. The structure of the h-Al 4 Re phase has not yet been clarified, but it is distinctly different from the Al 4 W phase suggested earlier. The structure of l-Al 4 Re was confirmed. The Al 3 Re phase was found to have a monoclinic structure with a = 0.5180(4) nm, b = 3.97641(9) nm, c = 0.4955(3) nm and β = 99.55(7) o

Re-irradiation for metastatic brain tumors with whole-brain radiotherapy

International Nuclear Information System (INIS)

Akiba, Takeshi; Kunieda, Etsuo; Kogawa, Asuka; Komatsu, Tetsuya; Tamai, Yoshifumi; Ohizumi, Yukio

2012-01-01

The objective of this study was to determine whether second whole-brain irradiation is beneficial for patients previously treated with whole-brain irradiation. A retrospective analysis was done for 31 patients with brain metastases who had undergone re-irradiation. Initial whole-brain irradiation was performed with 30 Gy/10 fractions for 87% of these patients. Whole-brain re-irradiation was performed with 30 Gy/10 fractions for 42% of these patients (3-40 Gy/1-20 fractions). Three patients underwent a third whole-brain irradiation. The median interval between the initial irradiation and re-irradiation was 10 months (range: 2-69 months). The median survival time after re-irradiation was 4 months (range: 1-21 months). The symptomatic improvement rate after re-irradiation was 68%, and the partial and complete tumor response rate was 55%. Fifty-two percent of the patients developed Grade 1 acute reactions. On magnetic resonance imaging, brain atrophy was observed in 36% of these patients after the initial irradiation and 74% after re-irradiation. Grade ≥2 encephalopathy or cognitive disturbance was observed in 10 patients (32%) after re-irradiation. Based on univariate analysis, significant factors related to survival after re-irradiation were the location of the primary cancer (P=0.003) and the Karnofsky performance status at the time of re-irradiation (P=0.008). A Karnofsky performance status ≥70 was significant based on multivariate analysis (P=0.050). Whole-brain re-irradiation for brain metastases placed only a slight burden on patients and was effective for symptomatic improvement. However, their remaining survival time was limited and the incidence of cognitive disturbance was rather high. (author)

Re-irradiation of recurrent esophageal cancer after primary definitive radiotherapy

Energy Technology Data Exchange (ETDEWEB)

Kim, Young Suk; Lee, Chang Geol; Kim, Kyung Hwan; Kim, Tae Hyung [Dept. of Radiation Oncology, Yonsei University Health System, Yonsei University College of Medicine, Seoul (Korea, Republic of)

2012-12-15

For recurrent esophageal cancer after primary definitive radiotherapy, no general treatment guidelines are available. We evaluated the toxicities and clinical outcomes of re-irradiation (re-RT) for recurrent esophageal cancer. We analyzed 10 patients with recurrent esophageal cancer treated with re-RT after primary definitive radiotherapy. The median time interval between primary radiotherapy and re-RT was 15.6 months (range, 4.8 to 36.4 months). The total dose of primary radiotherapy was a median of 50.4 Gy (range, 50.4 to 63.0 Gy). The total dose of re-RT was a median of 46.5 Gy (range, 44.0 to 50.4 Gy). The median follow-up period was 4.9 months (range, 2.6 to 11.4 months). The tumor response at 3 months after the end of re-RT was complete response (n = 2), partial response (n = 1), stable disease (n = 2), and progressive disease (n = 5). Grade 5 tracheoesophageal fistula developed in three patients. The time interval between primary radiotherapy and re-RT was less than 12 months in two of these three patients. Late toxicities included grade 1 dysphagia (n = 1). Re-RT of recurrent esophageal cancer after primary radiotherapy can cause severe toxicity.

Re-irradiation of recurrent esophageal cancer after primary definitive radiotherapy

International Nuclear Information System (INIS)

Kim, Young Suk; Lee, Chang Geol; Kim, Kyung Hwan; Kim, Tae Hyung

2012-01-01

For recurrent esophageal cancer after primary definitive radiotherapy, no general treatment guidelines are available. We evaluated the toxicities and clinical outcomes of re-irradiation (re-RT) for recurrent esophageal cancer. We analyzed 10 patients with recurrent esophageal cancer treated with re-RT after primary definitive radiotherapy. The median time interval between primary radiotherapy and re-RT was 15.6 months (range, 4.8 to 36.4 months). The total dose of primary radiotherapy was a median of 50.4 Gy (range, 50.4 to 63.0 Gy). The total dose of re-RT was a median of 46.5 Gy (range, 44.0 to 50.4 Gy). The median follow-up period was 4.9 months (range, 2.6 to 11.4 months). The tumor response at 3 months after the end of re-RT was complete response (n = 2), partial response (n = 1), stable disease (n = 2), and progressive disease (n = 5). Grade 5 tracheoesophageal fistula developed in three patients. The time interval between primary radiotherapy and re-RT was less than 12 months in two of these three patients. Late toxicities included grade 1 dysphagia (n = 1). Re-RT of recurrent esophageal cancer after primary radiotherapy can cause severe toxicity.

The oxidation of ReCl_5 with oleum: synthesis and crystal structure of Re_2O_4Cl_4(SO_4)

International Nuclear Information System (INIS)

Betke, Ulf; Wickleder, Mathias S.

2012-01-01

The reaction of ReCl_5 and fuming sulfuric acid (25 % SO_3) in a sealed glass tube at 200 C led to red, needle shaped single crystals of Re_2O_4Cl_4(SO_4) (monoclinic, C2/c, a = 1501.8(2) pm, b = 1545.9(2) pm, c = 945.18(8) pm, β = 98.761(9) , Z = 8). In the crystal structure the [ReO_2] moieties are linked by [SO_4]"2"- tetrahedra to chains along the [101] direction. Each sulfate ion connects four rhenium atoms, additional two chloride ions complete the octahedral coordination sphere of each rhenium atom according to "1_∞[ReO_2_/_1Cl_2_/_1(SO_4)_2_/_4]. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Perks of Tracking What You're Eating

Science.gov (United States)

It’s important to keep track of the steps you’re taking toward nourishing your body with a healthier diet. By keeping track of what you’re eating—even for a couple of weeks— you may be able to identify patterns that are helping—or hurting—your goals for nourishing your body in a healthy way.

Behavior of Re and Os during contact between an aqueous solution and oil: Consequences for the application of the Re-Os geochronometer to petroleum

Science.gov (United States)

Mahdaoui, Fatima; Michels, Raymond; Reisberg, Laurie; Pujol, Magali; Poirier, Yannick

2015-06-01

Several recent studies have raised the exciting possibility that oils can be dated using the Re-Os radioisotope system. However the exact nature of the events dated by this technique often remains unclear. Geochronologic interpretation of Re-Os data for oils is hampered by our limited knowledge of how these metals behave in petroleum systems. In particular, it is difficult to understand how isotopic homogenization, an essential prerequisite for the development of an isochronal relationship, can be achieved at the scale of a petroleum basin. The mechanisms capable of fractionating the Re/Os ratio in a suite of oils are also poorly understood. For this reason, we have performed an experimental study aimed at investigating the behavior of Re and Os during a particularly widespread phenomenon in petroleum systems, the interaction of formation waters with oils during migration. Contact experiments between natural oils and aqueous solutions enriched in Re and/or Os were carried out for varying lengths of time (6 h to 5 months), at different temperatures (25-150 °C), over a wide range of metal concentrations in the enriched solution (0.001-100 μg/g for Re; 1 and 10 ng/g for Os). In addition, the effect of oil composition on Re-Os exchange at the water-oil interface was examined by testing two oils with very different properties. All of our results demonstrate that Re and Os are transferred massively and very rapidly from the aqueous solution to the organic phase. This is true regardless of temperature or oil composition. It is also true for a very wide range of metal concentrations in the aqueous solution, up to an apparent saturation level that exceeds natural concentrations in oils by several orders of magnitude. Given the efficiency of Re and Os transfer from water to oil demonstrated here, and assuming that our findings are applicable to natural conditions, water/oil ratios of only about 250 would be needed to explain the Re and Os contents of most oils, based on

Re-utilization of concrete from decommissioned nuclear facilities by re-clinkering

International Nuclear Information System (INIS)

Costes, J.R.

1998-01-01

Usually concrete is reused as aggregates. To maximize reusing by producing a new concrete, separation of its fundamental components (aggregates, sand, cement) is required. But can already hydrated cement be re-clinkered and become new good cement again? This paper shows how specimen of pure cement paste of ordinary Portland cement was hydrated then crushed and reclinkerised. Chemical and, X ray diffraction analysis, electronic microscope coupled with X fluorescence observations, demonstrate that very few differences occurs in the cement paste before and after re-clinkering; mechanical properties of the reactivated powder are very satisfactory, even exceeding the strength of the original pure cement paste. As this process involves heating up to 1450 deg C, some of the contamination (caesium, ruthenium) may also be eliminated by volatilization and recovery on filters. This process could be very promising to complete recycle large quantities of low level contaminated concrete inside the nuclear industry as alternative to storage in specific and expensive dump, as it is now the case for steel materials. (authors)

Preparation and characterization of sintered Mo-Re alloys

International Nuclear Information System (INIS)

Morito, F.

1993-01-01

By the method of powder metallurgy, we have tried to fabricate Mo-Re alloys, which were electron beam weldable. Severe quality control was carried out during the whole fabrication process focused to reducing oxygen contamination. It is inevitable that the starting raw powders of Mo and Re were both high purity with 99.99 mass% up. Moreover, high vacuum sintering was performed before final sintering with high-purity hydrogen gas. As a result, we obtained electron beam weldable Mo-Re alloys, the total oxygen content of which was about 10 mass ppm or less, respectively. Several specimens were melted by electron beam welding (EBW) method. It was found that EBW gives an easy and effective survey to examine the weldability and the quality of the materials. Fracture surfaces examined by AES exhibited very low content of oxygen, carbon and nitrogen or that less than detectability limit. In conclusion, we have succeeded to obtain defect-free welds of sintered Mo-Re alloys. Furthermore it was found that Mo-Re alloys showed excellent potentialities not only in mechanical properties at low temperature but also in the respects of microstructure. (orig.)

MetReS, an Efficient Database for Genomic Applications.

Science.gov (United States)

Vilaplana, Jordi; Alves, Rui; Solsona, Francesc; Mateo, Jordi; Teixidó, Ivan; Pifarré, Marc

2018-02-01

MetReS (Metabolic Reconstruction Server) is a genomic database that is shared between two software applications that address important biological problems. Biblio-MetReS is a data-mining tool that enables the reconstruction of molecular networks based on automated text-mining analysis of published scientific literature. Homol-MetReS allows functional (re)annotation of proteomes, to properly identify both the individual proteins involved in the processes of interest and their function. The main goal of this work was to identify the areas where the performance of the MetReS database performance could be improved and to test whether this improvement would scale to larger datasets and more complex types of analysis. The study was started with a relational database, MySQL, which is the current database server used by the applications. We also tested the performance of an alternative data-handling framework, Apache Hadoop. Hadoop is currently used for large-scale data processing. We found that this data handling framework is likely to greatly improve the efficiency of the MetReS applications as the dataset and the processing needs increase by several orders of magnitude, as expected to happen in the near future.

Die Altäre von Selinunt

OpenAIRE

Voigts, Clemens

2014-01-01

In der Dissertation wurden die Altäre von Selinunt, einer griechischen Kolonie auf Sizilien, mit den Methoden der Bauforschung untersucht. Die neun behandelten Brandopferaltäre sind monumentale Quaderbauten, die bis zu 20 m Länge erreichen. Sie stammen aus der Blütezeit Selinunts, dem 6. und 5. Jh. v. Chr. Die Bauten waren bereits im 19. und 20. Jh. freigelegt worden und wurden nun in Bauaufnahmen dokumentiert, zeichnerisch rekonstruiert und zeitlich eingeordnet. Dabei ließ sich an ihnen eine...

Configurations of the Re-scan Confocal Microscope (RCM) for biomedical applications

NARCIS (Netherlands)

de Luca, G. M. R.; Desclos, E.; Breedijk, R. M. P.; Dolz-Edo, L.; Smits, G. J.; Bielefeld, P.; Picavet, L.; Fitzsimons, C. P.; Hoebe, R.; Manders, E. M. M.

2017-01-01

The new high-sensitive and high-resolution technique, Re-scan Confocal Microscopy (RCM), is based on a standard confocal microscope extended with a re-scan detection unit. The re-scan unit includes a pair of re-scanning mirrors that project the emission light onto a camera in a scanning manner. The

Configurations of the Re-scan Confocal Microscope (RCM) for biomedical applications

NARCIS (Netherlands)

De Luca, G.M.R.; Desclos, E.; Breedijk, R.M.P.; Dolz-Edo, L.; Smits, G.J.; Nahidiazar, L.; Bielefeld, P.; Picavet, L.; Fitzsimons, C.P.; Hoebe, R.; Manders, E.M.M.

The new high-sensitive and high-resolution technique, Re-scan Confocal Microscopy (RCM), is based on a standard confocal microscope extended with a re-scan detection unit. The re-scan unit includes a pair of re-scanning mirrors that project the emission light onto a camera in a scanning manner. The

The business of refractive laser assisted cataract surgery (ReLACS).

Science.gov (United States)

Berdahl, John P; Jensen, Matthew P

2014-01-01

Refractive Laser Assisted Cataract Surgery (ReLACS) combines the femtosecond laser with other noncovered tests and services in an attempt to reduce spectacle dependence in combination with cataract surgery. Significant interest is present among ophthalmologists who are considering adopting this technology, however significant capital outlays and continuing expenses can make the decision to adopt ReLACS foreboding. We review the financial considerations of ReLACS and review the trends seen in early adopters of this technology. Recent findings have shown that ReLACS is a growing segment of cataract surgery. Most practices who have implemented the technology have broken even and have a positive outlook on the financial return of implementing the ReLACS program. The average break-even analysis point for practices is around 230 cases a year. ReLACS is growing and appears to be a financial viable approach for many practices.

Itinerant-electron antiferromagnetism and superconductivity in bcc Cr-Re alloys

International Nuclear Information System (INIS)

Nishihara, Y.; Yamaguchi, Y.; Kohara, T.; Tokumoto, M.

1985-01-01

The magnetic and superconducting properties of bcc Cr-Re alloys with up to 40 at. % Re were studied via measurements of the magnetic susceptibility, electrical resistivity, and nuclear magnetic resonance of the Re nuclei. Antiferromagnetic order coexists with superconductivity above 18 at. % Re. The results were analyzed with the coexistence model of spin-density waves and superconductivity. In the Re-concentration range greater than 18 at. %, about 10% of the Fermi surface satisfies the nesting condition and the rest of it contributes to form the superconducting gap. This model also explains the increase in the superconducting transition temperature and the decrease in the magnetic susceptibility by annealing as a competing effect between spin-density waves and superconductivity

The Monge-Ampère equation

CERN Document Server

Gutiérrez, Cristian E

2016-01-01

Now in its second edition, this monograph explores the Monge-Ampère equation and the latest advances in its study and applications. It provides an essentially self-contained systematic exposition of the theory of weak solutions, including regularity results by L. A. Caffarelli. The geometric aspects of this theory are stressed using techniques from harmonic analysis, such as covering lemmas and set decompositions. An effort is made to present complete proofs of all theorems, and examples and exercises are offered to further illustrate important concepts. Some of the topics considered include generalized solutions, non-divergence equations, cross sections, and convex solutions. New to this edition is a chapter on the linearized Monge-Ampère equation and a chapter on interior Hölder estimates for second derivatives. Bibliographic notes, updated and expanded from the first edition, are included at the end of every chapter for further reading on Monge-Ampère-type equations and their diverse applications in th...

Solitary circumscribed neurofibroma of the vulva

International Nuclear Information System (INIS)

Lau Serrano, Dalgis; Millan Vega, Maria Margarita; Fajardo Tornes, Yarine Leonell

2012-01-01

Neurofibroma is a benign tumor that originates from cells of peripheral nerve sheath. It may occur as solitary or multiple lesions as part of Von Recklinghausen disease or neurofibromatosis. The solitary lesions are rare and usually they are not associated with systemic symptoms

A study on plate anchor detailing systems of shear re-bar

International Nuclear Information System (INIS)

Tsurumaki, S.; Ujiie, K.; Nishikawa, T.; Kitayama, K.

1995-01-01

For shell walls and base slabs in reactor buildings, besides a large amount of main bars, numerous shear re-bars have been employed to resist to out-of-plane force. As a result , detailing work involving shear re-bar is extremely involved. For example, the employed re-bar anchor method differs from the ordinary methods in which, a end of shear re-bar with 135-degrees hook or with anchor plate type and another re-bar end with 90-degrees hook are used. However the structural characteristics in members using shear re-bar of the bolt-mounted anchor plate have not yet been examined. A test was performed to confirm the effects of anchor methods for shear re-bars on shearing behavior of members. This paper describes the test plan, method and results. (author). 12 figs., 7 tabs

You're Hired!

Science.gov (United States)

Weinstein, Margery

2011-01-01

"You're hired!" Those two words are easy to say, but it's not always easy to find the right employee. Success hinges on hiring interviews--and they require quite a bit of training to get right. Much of the work in identifying the best people for open positions falls to line-of-business managers. In this article, Verizon Wireless, Umpqua Bank,…

Influence of annealing temperature on structural and optical properties of SiO{sub 2}:RE{sub 2}O{sub 3} [RE = Y, Gd] powder

Energy Technology Data Exchange (ETDEWEB)

Ahlawat, Rachna, E-mail: rachnaahlawat2003@yahoo.com

2015-07-25

Highlights: • Sol–gel process is used to obtain spherical nanocrystallites of SiO{sub 2}:RE{sub 2}O{sub 3} [RE = Y, Gd] powder. • Effect of four steps annealing is studied on micro strain, nanocrystallite size and dislocation density. • Optical properties are examined by absorption spectra and PL. • SiO{sub 2}:RE{sub 2}O{sub 3} [RE = Y, Gd] binary oxides are promising materials for high temperature structural applications. - Abstract: SiO{sub 2}:RE{sub 2}O{sub 3} [RE = Y, Gd] powder were prepared by wet chemical technique and the prepared binary oxides annealed at 500 °C and 900 °C. The crystalline structure, phase transformation, and surface morphologies of as-prepared and annealed samples were investigated by XRD and TEM. The normal transmission was measured using FTIR spectroscopy. Optical properties have been studied with UV–Vis spectroscopy and PL study. XRD results shows that the as prepared samples of SiO{sub 2}:RE{sub 2}O{sub 3} [RE = Y, Gd] powder has mixed phases of RE(NO{sub 3}){sub 3} and Si(OH){sub 3}. However, cubic rare earth oxide phase alone is found for annealed samples. The strain values are calculated from W–H plot for annealed samples. TEM micrograph shows that the samples are composed of individual spherical nanocrystallites at 500 °C and aggregated nanocrystallites at 900 °C. From the UV–Vis spectra, it is found that the position of the absorption peak is shifted toward the higher wavelength side when annealing temperature is increased. In the PL spectra, the broad emission bands are observed between 570–600 nm and the presence of O–Si–O (silica) and metal oxide is confirmed by FTIR spectra.

RDM lifetimes measurements in 179Re

International Nuclear Information System (INIS)

Chamoli, S.; Joshi, P.; Kumar, A.; Govil, I.M.; Singh, R.P.; Chatturvedi, L.

2001-01-01

The study of Re nuclei in the mass region from 170-190 is of particular interest as they lie in a region where the Nilsson orbitals exhibit large driving effects on the nuclear shape, presenting the strong possibility of shape coexistence. To see the variation of the deformation driving property of different bands and the other related phenomena like delay in band crossing frequency for intruder configuration h 92 in these nuclei with increasing in neutron number the lifetime measurement in 179 Re nucleus is done

Discriminative Multi-View Interactive Image Re-Ranking.

Science.gov (United States)

Li, Jun; Xu, Chang; Yang, Wankou; Sun, Changyin; Tao, Dacheng

2017-07-01

Given an unreliable visual patterns and insufficient query information, content-based image retrieval is often suboptimal and requires image re-ranking using auxiliary information. In this paper, we propose a discriminative multi-view interactive image re-ranking (DMINTIR), which integrates user relevance feedback capturing users' intentions and multiple features that sufficiently describe the images. In DMINTIR, heterogeneous property features are incorporated in the multi-view learning scheme to exploit their complementarities. In addition, a discriminatively learned weight vector is obtained to reassign updated scores and target images for re-ranking. Compared with other multi-view learning techniques, our scheme not only generates a compact representation in the latent space from the redundant multi-view features but also maximally preserves the discriminative information in feature encoding by the large-margin principle. Furthermore, the generalization error bound of the proposed algorithm is theoretically analyzed and shown to be improved by the interactions between the latent space and discriminant function learning. Experimental results on two benchmark data sets demonstrate that our approach boosts baseline retrieval quality and is competitive with the other state-of-the-art re-ranking strategies.

Software Toolchain for Large-Scale RE-NFA Construction on FPGA

Directory of Open Access Journals (Sweden)

Yi-Hua E. Yang

2009-01-01

and O(n×m memory by our software. A large number of RE-NFAs are placed onto a two-dimensional staged pipeline, allowing scalability to thousands of RE-NFAs with linear area increase and little clock rate penalty due to scaling. On a PC with a 2 GHz Athlon64 processor and 2 GB memory, our prototype software constructs hundreds of RE-NFAs used by Snort in less than 10 seconds. We also designed a benchmark generator which can produce RE-NFAs with configurable pattern complexity parameters, including state count, state fan-in, loop-back and feed-forward distances. Several regular expressions with various complexities are used to test the performance of our RE-NFA construction software.

Automatic re-contouring in 4D radiotherapy

International Nuclear Information System (INIS)

Lu, Weiguo; Olivera, Gustavo H; Chen, Quan; Chen, Ming-Li; Ruchala, Kenneth J

2006-01-01

Delineating regions of interest (ROIs) on each phase of four-dimensional (4D) computed tomography (CT) images is an essential step for 4D radiotherapy. The requirement of manual phase-by-phase contouring prohibits the routine use of 4D radiotherapy. This paper develops an automatic re-contouring algorithm that combines techniques of deformable registration and surface construction. ROIs are manually contoured slice-by-slice in the reference phase image. A reference surface is constructed based on these reference contours using a triangulated surface construction technique. The deformable registration technique provides the voxel-to-voxel mapping between the reference phase and the test phase. The vertices of the reference surface are displaced in accordance with the deformation map, resulting in a deformed surface. The new contours are reconstructed by cutting the deformed surface slice-by-slice along the transversal, sagittal or coronal direction. Since both the inputs and outputs of our automatic re-contouring algorithm are contours, it is relatively easy to cope with any treatment planning system. We tested our automatic re-contouring algorithm using a deformable phantom and 4D CT images of six lung cancer patients. The proposed algorithm is validated by visual inspections and quantitative comparisons of the automatic re-contours with both the gold standard segmentations and the manual contours. Based on the automatic delineated ROIs, changes of tumour and sensitive structures during respiration are quantitatively analysed. This algorithm could also be used to re-contour daily images for treatment evaluation and adaptive radiotherapy

Re-Os geochronology of a Mesoproterozoic sedimentary succession, Taoudeni basin, Mauritania: Implications for basin-wide correlations and Re-Os organic-rich sediments systematics

Science.gov (United States)

Rooney, Alan D.; Selby, David; Houzay, Jean-Pierre; Renne, Paul R.

2010-01-01

The exceptionally well-preserved sedimentary rocks of the Taoudeni basin, NW Africa represent one of the world's most widespread (> 1 M km 2) Proterozoic successions. Hitherto, the sedimentary rocks were considered to be Mid Tonian based on Rb-Sr illite and glauconite geochronology of the Atar Group. However, new Re-Os organic-rich sediment (ORS) geochronology from two drill cores indicates that the Proterozoic Atar Group is ˜ 200 Ma older (1107 ± 12 Ma, 1109 ± 22 Ma and 1105 ± 37 Ma). The Re-Os geochronology suggests that the Rb-Sr geochronology records the age of diagenetic events possibly associated with the Pan African collision. The new Re-Os geochronology data provide absolute age constraints for recent carbon isotope chemostratigraphy which suggests that the Atar Group is Mesoproterozoic and not Neoproterozoic. The new Re-Os ORS geochronology supports previous studies that suggest that rapid hydrocarbon generation (flash pyrolysis) from contact metamorphism of a dolerite sill does not significantly disturb the Re-Os ORS systematics. Modelled contact conditions suggest that the Re-Os ORS systematics remain undisturbed at ˜ 650 °C at the sill/shale contact and ≥ 280 °C 20 m from the sill/shale contact. Moreover, the Re-Os geochronology indicates that the West African craton has a depositional history that predates 1100 Ma and that ORS can be correlated on a basin-wide scale. In addition, the Re-Os depositional ages for the ORS of the Taoudeni basin are comparable to those of ORS from the São Francisco craton, suggesting that these cratons are correlatable. This postulate is further supported by identical Os i values for the Atar Group and the Vazante Group of the São Francisco craton.

Production of carrier-free 188Re in the past ten years in Taiwan

International Nuclear Information System (INIS)

Bor-Tsung Hsieh; Institute of Nuclear Energy Research, Taiwan; Wan-Yu Lin; Tsai-Yueh Luo; Kai-Yuan Cheng

2007-01-01

Twenty clinical scale alumina-based 188 W/ 188 Re generators and carrier-free 188 Re has been produced at the Institute of Nuclear Energy Research (INER-Taiwan) for over ten years. 2845.6 GBq (76.9 Ci) of 188 Re-perrhenate solution has been eluted from generators during the past ten years. We have used the harvesting 188 Re solution for labeling radiopharmaceuticals, such as 188 Re-HEDP, 188 Re-MDP, 188 Re-microsphere, 188 Relipiodol, and 188 Re-sulfur colloid, etc. The average eluting yield of 188 Re is 78.6±5.8% that was investigated at 1115 harvesting times from 20 generators. Each generator can be used more than six months but the Millipore needs to be changed every two months for smooth harvesting and high yield of 188 Re solution. (author)

42 CFR 405.213 - Re-evaluation of a device categorization.

Science.gov (United States)

2010-10-01

... 42 Public Health 2 2010-10-01 2010-10-01 false Re-evaluation of a device categorization. 405.213... Decisions That Relate to Health Care Technology § 405.213 Re-evaluation of a device categorization. (a... experimental/investigational (Category A) may request re-evaluation of the categorization decision. (2) A...

The mitochondrial genome of the ethanol-metabolizing, wine cellar mold Zasmidium cellare is the smallest for a filamentous ascomycete

Energy Technology Data Exchange (ETDEWEB)

Goodwin, Stephen; McCorison, Cassandra B.; Cavaletto, Jessica R.; Culley, David E.; LaButti, Kurt M.; Baker, Scott E.; Grigoriev, Igor V.

2016-05-20

Fungi in the class Dothideomycetes often live in extreme environments or have unusual physiology. One of these, the wine cellar mold Zasmidium cellare, produces thick curtains of mycelial growth in cellars with high humidity, and its ability to metabolize volatile organic compounds including alcohols, esters and formaldehyde is thought to improve air quality. It grows slowly but appears to outcompete ordinarily faster-growing species under anaerobic conditions.Whether these abilities have affected its mitochondrial genome is not known.To fill this gap, its mitochondrial genome was assembled as part of a whole- genome shotgun-sequencing project.The circular-mapping mitochondrial genome of Z. cellare, at only 23,743 bp, is the smallest yet reported for a filamentous fungus.It contains the complete set of 14 protein-coding genes seen typically in other filamentous fungi, along with genes for large and small ribosomal RNA subunits, 25 predicted tRNA genes capable of decoding all 20 amino acids, and a single open reading frame potentially coding for a protein of unknown function.The Z. cellare mitochondrial genome had genes encoded on both strands with a single change of direction, different from most other fungi but consistent with the Dothideomycetes. The high synteny among mitochondrial genomes of fungi in the Eurotiomycetes broke down almost completely in the Dothideomycetes.Only a low level of microsynteny was observed among protein-coding and tRNA genes in comparison with Mycosphaerella graminicola (synonym Zymoseptoria tritici), the only other fungus in the order Capnodiales with a sequenced mitochondrial genome, involving the three gene pairs atp8-atp9, nad2-nad3, and nad4L-nad5.However, even this low level of microsynteny did not extend to other fungi in the Dothideomycetes and Eurotiomycetes. Phylogenetic analysis of concatenated protein-coding genes confirmed the relationship between Z. cellare and M. graminicola in the Capnodiales, although conclusions were

(Re)Discovering University Autonomy

DEFF Research Database (Denmark)

This book challenges traditional approach to university autonomy which is based on four pillars: organisational, financial, human resource, and academic. The main thesis is that a fuller understanding of university autonomy can only be obtained through a more holistic view of the complex inter-re...

Goal-Equivalent Secure Business Process Re-engineering

DEFF Research Database (Denmark)

Acosta, Hugo Andrés Lópes; Massacci, Fabio; Zannone, Nicola

2008-01-01

that they are somehow “equivalent”. In this paper we propose a method for passing from SI*, a modeling language for capturing and modeling functional, security, and trust organizational and system requirements, to business process specifications and vice versa. In particular, starting from an old secure business......The introduction of information technologies in health care systems often requires to re-engineer the business processes used to deliver care. Obviously, the new and re-engineered processes are observationally different and thus we cannot use existing model-based techniques to argue...... process, we reconstruct the functional and security requirements at organizational level that such a business process was supposed to meet (including the trust relations that existed among the members of the organization). To ensure that the re-engineered business process meets the elicited requirements...

Equilibrium polymerization models of re-entrant self-assembly

Science.gov (United States)

Dudowicz, Jacek; Douglas, Jack F.; Freed, Karl F.

2009-04-01

As is well known, liquid-liquid phase separation can occur either upon heating or cooling, corresponding to lower and upper critical solution phase boundaries, respectively. Likewise, self-assembly transitions from a monomeric state to an organized polymeric state can proceed either upon increasing or decreasing temperature, and the concentration dependent ordering temperature is correspondingly called the "floor" or "ceiling" temperature. Motivated by the fact that some phase separating systems exhibit closed loop phase boundaries with two critical points, the present paper analyzes self-assembly analogs of re-entrant phase separation, i.e., re-entrant self-assembly. In particular, re-entrant self-assembly transitions are demonstrated to arise in thermally activated equilibrium self-assembling systems, when thermal activation is more favorable than chain propagation, and in equilibrium self-assembly near an adsorbing boundary where strong competition exists between adsorption and self-assembly. Apparently, the competition between interactions or equilibria generally underlies re-entrant behavior in both liquid-liquid phase separation and self-assembly transitions.

188Re(V) Nitrido Radiopharmaceuticals for Radionuclide Therapy.

Science.gov (United States)

Boschi, Alessandra; Martini, Petra; Uccelli, Licia

2017-01-19

The favorable nuclear properties of rhenium-188 for therapeutic application are described, together with new methods for the preparation of high yield and stable 188 Re radiopharmaceuticals characterized by the presence of the nitride rhenium core in their final chemical structure. 188 Re is readily available from an 188 W/ 188 Re generator system and a parallelism between the general synthetic procedures applied for the preparation of nitride technetium-99m and rhenium-188 theranostics radiopharmaceuticals is reported. Although some differences between the chemical characteristics of the two metallic nitrido fragments are highlighted, it is apparent that the same general procedures developed for the labelling of biologically active molecules with technetium-99m can be applied to rhenium-188 with minor modification. The availability of these chemical strategies, that allow the obtainment, in very high yield and in physiological condition, of 188 Re radiopharmaceuticals, gives a new attractive prospective to employ this radionuclide for therapeutic applications.

188Re(V) Nitrido Radiopharmaceuticals for Radionuclide Therapy

Science.gov (United States)

Boschi, Alessandra; Martini, Petra; Uccelli, Licia

2017-01-01

The favorable nuclear properties of rhenium-188 for therapeutic application are described, together with new methods for the preparation of high yield and stable 188Re radiopharmaceuticals characterized by the presence of the nitride rhenium core in their final chemical structure. 188Re is readily available from an 188W/188Re generator system and a parallelism between the general synthetic procedures applied for the preparation of nitride technetium-99m and rhenium-188 theranostics radiopharmaceuticals is reported. Although some differences between the chemical characteristics of the two metallic nitrido fragments are highlighted, it is apparent that the same general procedures developed for the labelling of biologically active molecules with technetium-99m can be applied to rhenium-188 with minor modification. The availability of these chemical strategies, that allow the obtainment, in very high yield and in physiological condition, of 188Re radiopharmaceuticals, gives a new attractive prospective to employ this radionuclide for therapeutic applications. PMID:28106830

Preparation of 186Re complexes of dimercaptosuccinic acid hydroxy ethylidine diphosphonate

International Nuclear Information System (INIS)

Kothari, K.; Pillai, M.R.A.; Unni, P.R.; Mathakar, A.R.; Shimpi, H.H.; Noronha, O.P.D.; Samuel, A.M.

1998-01-01

99m Tc(V)-DMSA and 99m Tc-HEDP are widely used for imaging medullary carcinoma and bone, respectively. 186 Re-HEDP is now well established as a therapeutic radiopharmaceutical for palliation of pain due to bone metastases. It is expected that 186/188 Re(V)-DMSA could find application for treating medullary carcinoma. In the present paper we report the work carried out for the preparation of 186 Re complexes of DMSA and HEDP and their bio-distribution studies in Wistar rats. 186 Re was prepared by irradiation of natural Re metal at a flux of 3x10 13 neutrons/cm 2 /s for seven days and processed after a cooling period of four days. The specific activity of 186 Re formed was ∼35 mCi/mg. Complexes with RC purity >98% could be prepared in both the cases by carefully optimizing the reaction conditions. Bio-distribution studies carried out in rats revealed that pharmacological behaviour of 186 Re(V)-DMSA was similar to that of 99m Tc(V)-DMSA. 186 Re-HEDP showed a bone uptake of ∼ 30% at 3 h post injection which remained almost constant for 48 h. (author)

A theoretical approach to the re-suspension factor

Directory of Open Access Journals (Sweden)

Magnoni M.

2012-04-01

Full Text Available The atmospheric re-suspension of radionuclides is a well-known phenomenon that consists in the re-injection into the atmosphere of previously deposited radioactivity. The process is driven by the action of wind on surfaces and can act as an additional source of radiation exposure by inhalation, after the deposition has finished. It is thus defined as the re-suspension factor, a parameter K generally considered as a time depending function and defined as the ratio of Ca, the volumetric air activity concentration (Bq m−3 and I0 (Bq m−2, the radioactivity deposition at time zero. The re-suspension factor concept is very useful in radioprotection in order to estimate the inhalation of radionuclides re-suspended from contaminated surfaces when direct atmospheric measurements are lacking or difficult to perform. However, the choice of the proper values of K is usually not a simple task, being quite site-specific and related to the meteorological, géomorphologie and environmental characteristics of the area to be studied. Moreover, several investigations showed clearly that the values of K are a decreasing function of time. For that reason, K values span several orders of magnitude: typical values in the range 10−5–10−10 m−1 are reported in literature for different environmental conditions and time elapsed since the deposition event. The current available models for the re-suspension factor are based on empirical formulas whose parameters are highly site dependent and cannot easily be related to some physical quantity. In this paper a simple physical model for the re-suspension factor is proposed and tested with available environmental radioactivity data (137Cs, collected since 1986 (Chernobyl fallout. The new model not only allows a satisfactory description of the experimental data like even the current empirical models do, but it is also able to connect the K values to quantities with a physical meaning (such as, for example a diffusion

The effects of vascularized tissue transfer on re-irradiation

International Nuclear Information System (INIS)

Narayan, K.; Ashton, M.W.; Taylor, G.I.

1996-01-01

Purpose: Nowadays, radical re-irradiation of locally recurrent squamous cell carcinoma is being increasingly tried. The process usually involves some form of surgical excision and vascularized tissue transfer followed by re-irradiation. The aim of this study was to examine the extent of protection from the effects of re-irradiation provided by vascularized tissue transfer. Methods and Materials: One hundred Sprague Dawley rats had their left thighs irradiated to a total dose of 72Gy in 8 fractions, one fraction per day, 5 days per week. The rats were then divided into two groups: At 4 months, one half of the rats had 50% of their quadriceps musculature excised and replaced with a vascularized non-irradiated rectus abdominous myocutaneous flap. The other group served as the control. Six months following the initial radiotherapy all rats were then re-irradiated with either 75 or 90% of the original dose. Incidence of necrosis and the extent of necrosis was measured. Microvasculature of control, transplanted muscle and recipient site was studied by micro-corrosion cast technique and histology of cast specimen. tissues were sampled at pre-irradiation and at 2, 6 and 12 months post re-irradiation. Microvascular surface area was measured from the histology of cast specimen. Results: Necrosis in the control group was clinically evident at 6 weeks post re irradiation and by 10 months all rats developed necrosis. Forty per cent of the thigh that received 75% of the original dose on re-irradiation did not develop any necrosis by 13 months. Other groups developed necrosis to variable extents, however a rim of tissue around the graft always survived. The average thickness of surviving tissue was 9mm. (range being 4-25 mm). None of the transferred flap nor re-irradiated recipient quadriceps developed necrosis. Conclusion: 1. Transplanted rectus abdominus myocutaneous flap and undisturbed muscle have similar radiation tolerance. 2. Vascularized myocutaneous flap offers

Synthesis of ReN3 Thin Films by Magnetron Sputtering

Directory of Open Access Journals (Sweden)

G. Soto

2014-01-01

Full Text Available In this work ReNx films were prepared by reactive magnetron sputtering at room temperature and deposited on a silicon wafer. It was found that the diffractograms of the nitrogen-rich rhenium film are consistent with those produced by high-pressure high-temperature methods, under the assumption that the film is oriented on the substrate. Using density functional calculations it was found that the composition of this compound could be ReN3, instead of ReN2, as stated on previous works. The ReN3 compound fits in the Ama2 (40 orthorhombic space group, and due to the existence of N3 anions between Re layers it should be categorized as an azide. The material is exceptionally brittle and inherently unstable under indentation testing.

Solubility and superconductivity in RE(Ba2-xREx)Cu3O7+δ (RE = Nd, Sm, Eu, Gd, Dy)

International Nuclear Information System (INIS)

Zhang, K.; Dabrowski, B.; Segre, C.U.; Hinks, D.G.; Schuller, I.K.; Jorgensen, J.D.; Slaski, M.

1987-10-01

Solid solutions of RE(Ba 2-x RE x )Cu 3 O 7- δ (RE=Nd,Sm,Eu,Gd,Dy) for x=0 to x=0.5 have been investigated. X-ray and resistivity measurements show that there exists a solid solution region, through which, the structure changes from orthorhombic to tetragonal and the superconducting properties are depressed. The solubility limits depend strongly on the size of the rare-earth ion, with the smallest (Dy) showing no appreciable solubility. The superconducting transition temperature versus x for all of the rare-earth ion substitutions falls on a universal curve, indicating that the Ba sites are extremely ionic and magnetically isolated. 20 refs., 4 figs

Staged abdominal re-operation for abdominal trauma.

Science.gov (United States)

Taviloglu, Korhan

2003-07-01

To review the current developments in staged abdominal re-operation for abdominal trauma. To overview the steps of damage control laparotomy. The ever increasing importance of the resuscitation phase with current intensive care unit (ICU) support techniques should be emphasized. General surgeons should be familiar to staged abdominal re-operation for abdominal trauma and collaborate with ICU teams, interventional radiologists and several other specialties to overcome this entity.

Leadership processes for re-engineering changes to the health care industry.

Science.gov (United States)

Guo, Kristina L

2004-01-01

As health care organizations seek innovative ways to change financing and delivery mechanisms due to escalated health care costs and increased competition, drastic changes are being sought in the form of re-engineering. This study discusses the leader's role of re-engineering in health care. It specifically addresses the reasons for failures in re-engineering and argues that success depends on senior level leaders playing a critical role. Existing studies lack comprehensiveness in establishing models of re-engineering and management guidelines. This research focuses on integrating re-engineering and leadership processes in health care by creating a step-by-step model. Particularly, it illustrates the four Es: Examination, Establishment, Execution and Evaluation, as a comprehensive re-engineering process that combines managerial roles and activities to result in successfully changed and reengineered health care organizations.

Synthesis of a '4+1' Re(V) complex from Re(III), and its ...

African Journals Online (AJOL)

bis(2-hydroxybenzyl)-2-(2-aminoethyl)dimethylamine) was prepared from the oxidation of [ReCl3(MeCN)(PPh3)2] by dioxygen in the presence of H2had in ethanol. This reaction was done under reflux conditions for a relatively short reaction ...

188Re labeling and biodistribution of magnetic nanoparticles for the tumor targeting

International Nuclear Information System (INIS)

Li Guiping; Zhang Hui; Wang Yongxian; Zhang Chunfu

2006-01-01

Objective: To prepare 188 Re labeled monoclonal antibody (Herceptin)-coated magnetic nanoparticles for tumor targeting and to study its biodistribution in mice. Methods: Herceptin and histidine were covalently linked to the amine group upon silica-coated magnetic nanoparticles modified by N-[3-(trimethyoxysilyl)prowl]-ethylenediamine using glutaraldehyde method. The Herceptin-coated magnetic nanoparticles and Herceptin were radiolabeled with 188 Re by a direct labelling method, whereas the histidine-coated magnetic nanoparticles was radiolabeled with 188 Re using fac-[ 188 Re(CO) 3 (H 2 0) 3 ] + as a precursor. The labelling efficiency and immunoreactivity as well as labelling stability were determined. Also, the biodistribution of 188 Re-magnetic and 188 Re-Herceptin-magnetic nanoparticles were observed in mice. Results: Herceptin-coated magnetic nanoparticles was characterized by transmission electron microscope (TEM) with diameter about 60 nm, while histidine-coated magnetic nanoparticles about 30 nm. The labeling efficiency for 188 Re-Herceptin, 188 Re-magnetic nanoparticles and 188 Re-Herceptin-magnetic nanoparticles were all > 90% and had a better stability in vitro. The immunoreactivity of Herceptin linked to magnetic nanoparticles was still high. The biodistribution in mice was shown that 188 Re-magnetic nanoparticles and 188 Re-Herceptin- magnetic nanoparticles had higher radioactivity levels in blood. Magnetic nanoparticles with diameter of 30 or 60 nm had a long half-life in blood stream and were accumulated in liver. Conclusion: The efficiency and stability of labelling Herceptin-coated magnetic nanoparticles and labelling magnetic nanoparticles with 188 Re are suitable for in vivo study in tumor-beating nude mice models. (authors)

Ternary gallides RE_4Rh_9Ga_5, RE_5Rh_1_2Ga_7 and RE_7Rh_1_8Ga_1_1 (RE=Y, La-Nd, Sm, Gd, Tb). Intergrowth structures with MgCu_2 and CaCu_5 related slabs

International Nuclear Information System (INIS)

Seidel, Stefan; Rodewald, Ute C.; Poettgen, Rainer; Janka, Oliver

2017-01-01

Fourteen ternary gallides RE_4Rh_9Ga_5, RE_5Rh_1_2Ga_7 and RE_7Rh_1_8Ga_1_1 (RE=Y, La-Nd, Sm, Gd, Tb) were synthesized from the elements by arc-melting, followed by different annealing sequences either in muffle or induction furnaces. The samples were characterized through Guinier powder patterns and the crystal structures of Ce_4Rh_9Ga_5, Ce_5Rh_1_2Ga_7, Ce_7Rh_1_8Ga_1_1, Nd_5Rh_1_0_._4_4_(_4_)Ga_8_._5_6_(_4_), Nd_4Rh_9Ga_5 and Gd_4Rh_9Ga_5 were refined from single crystal X-ray diffractometer data. The new gallides are the n=2, 3 and 5 members of the RE_2_+_n Rh_3_+_3_n Ga_1_+_2_n structure series in the Parthe intergrowth concept. The slabs of these intergrowth structures derive from the cubic Laves phase MgCu_2 (Mg_2Ni_3Si as ternary variant) and CaCu_5 (CeCo_3B_2 as ternary variant). Only the Nd_5Rh_1_0_._4_4_(_4_)Ga_8_._5_6_(_4_) crystal shows Rh/Ga mixing within the Laves type slabs. Magnetic susceptibility measurements reveal Pauli paramagnetism for Y_4Rh_9Ga_5 and Curie-Weiss paramagnetism for Gd_4Rh_9Ga_5 and Tb_4Rh_9Ga_5. Low-temperature data show ferromagnetic ordering at T_C=78.1 (Gd_4Rh_9Ga_5) and 55.8 K (Tb_4Rh_9Ga_5).

Regional Energy Deployment System (ReEDS)

Energy Technology Data Exchange (ETDEWEB)

Short, W.; Sullivan, P.; Mai, T.; Mowers, M.; Uriarte, C.; Blair, N.; Heimiller, D.; Martinez, A.

2011-12-01

The Regional Energy Deployment System (ReEDS) is a deterministic optimization model of the deployment of electric power generation technologies and transmission infrastructure throughout the contiguous United States into the future. The model, developed by the National Renewable Energy Laboratory's Strategic Energy Analysis Center, is designed to analyze the critical energy issues in the electric sector, especially with respect to potential energy policies, such as clean energy and renewable energy standards or carbon restrictions. ReEDS provides a detailed treatment of electricity-generating and electrical storage technologies and specifically addresses a variety of issues related to renewable energy technologies, including accessibility and cost of transmission, regional quality of renewable resources, seasonal and diurnal generation profiles, variability of wind and solar power, and the influence of variability on the reliability of the electrical grid. ReEDS addresses these issues through a highly discretized regional structure, explicit statistical treatment of the variability in wind and solar output over time, and consideration of ancillary services' requirements and costs.

The collaborative ec project ReCosy - 16203

International Nuclear Information System (INIS)

Kienzler, Bernhard; Buckau, Gunnar

2009-01-01

The Collaborative Project (CP) ReCosy (Redox Controlling Systems) was established in 2008. It falls within the EURATOM program and is implemented within the European Commission's 7. Framework Program. Main objectives of CP ReCosy are the sound understanding of redox phenomena controlling the long-term release/retention of radionuclides in nuclear waste disposal and providing tools to apply the results to Performance Assessment/Safety Case. Although redox is not a new geochemical problem, different questions are still not resolved and thus raised by implementers and scientists. Radionuclide redox transformations on minerals are considered to be decisive scenarios in various FEP lists. 32 institutions from 13 European countries contribute to the 4-years CP by i) development of advanced analytical tools, ii) investigations of processes responsible for redox control (thermodynamically and kinetically controlled processes, surface reactions and microbial processes), iii) provision of required data on redox controlling processes, and iv) response of the disposal systems to external/internal disturbances. Systems which are investigated comprise simple very well defined ones under controlled laboratory conditions, complex laboratory systems, near-natural systems in the laboratory, real systems, and near-field systems controlled spent nuclear fuel. The scientific results of the CP ReCosy are reported during annual workshops (AW). The first AW took place in February 10-12, 2009. The scientific contributions underwent a peer review and are published in the form of workshop proceedings together with scientific-technical overview papers of the different project work packages. The present paper summarizes the main results obtained after the first year of ReCosy. The status during the project preparation phase of the CP ReCosy is published elsewhere. (authors)

Zinc allocation and re-allocation in rice

Science.gov (United States)

Stomph, Tjeerd Jan; Jiang, Wen; Van Der Putten, Peter E. L.; Struik, Paul C.

2014-01-01

Aims: Agronomy and breeding actively search for options to enhance cereal grain Zn density. Quantifying internal (re-)allocation of Zn as affected by soil and crop management or genotype is crucial. We present experiments supporting the development of a conceptual model of whole plant Zn allocation and re-allocation in rice. Methods: Two solution culture experiments using 70Zn applications at different times during crop development and an experiment on within-grain distribution of Zn are reported. In addition, results from two earlier published experiments are re-analyzed and re-interpreted. Results: A budget analysis showed that plant zinc accumulation during grain filling was larger than zinc allocation to the grains. Isotope data showed that zinc taken up during grain filling was only partly transported directly to the grains and partly allocated to the leaves. Zinc taken up during grain filling and allocated to the leaves replaced zinc re-allocated from leaves to grains. Within the grains, no major transport barrier was observed between vascular tissue and endosperm. At low tissue Zn concentrations, rice plants maintained concentrations of about 20 mg Zn kg−1 dry matter in leaf blades and reproductive tissues, but let Zn concentrations in stems, sheath, and roots drop below this level. When plant zinc concentrations increased, Zn levels in leaf blades and reproductive tissues only showed a moderate increase while Zn levels in stems, roots, and sheaths increased much more and in that order. Conclusions: In rice, the major barrier to enhanced zinc allocation towards grains is between stem and reproductive tissues. Enhancing root to shoot transfer will not contribute proportionally to grain zinc enhancement. PMID:24478788

Re-Greening Ethiopia: History, Challenges and Lessons

Directory of Open Access Journals (Sweden)

Mulugeta Lemenih

2014-07-01

Full Text Available In Ethiopia, deforestation rates remain high and the gap between demand and domestic supply of forest products is expanding, even though government-initiated re-greening efforts began over a century ago. Today, over 3 million hectares (ha of degraded forest land are under area exclosure; smallholder plantations cover 0.8 million ha; and state-owned industrial plantations stagnate at under 0.25 million ha. This review captures experiences related to re-greening practices in Ethiopia, specifically with regards to area exclosure and afforestation and reforestation, and distills lessons regarding processes, achievements and challenges. The findings show that farmers and non-governmental organizations (NGOs are the main players, and that the private sector has so far played only a small role. The role of the government was mixed: supportive in some cases and hindering in others. The challenges of state- and NGO-led re-greening practices are: inadequate involvement of communities; poorly defined rehabilitation objectives; lack of management plans; unclear responsibilities and benefit-sharing arrangements; and poor silvicultural practices. The lessons include: a more active role for non-state actors in re-greening initiatives; more attention to market signals; devolution of management responsibility; clear definition of responsibilities and benefit-sharing arrangements; and better tenure security, which are all major factors to success.

Interstitial-mediated diffusion and clustering for transmutation elements Re and Os precipitation in W

Science.gov (United States)

Zhou, Hong-Bo; Li, Yu-Hao; Lu, Guang-Hong

Under high energy (14 eV) neutrons irradiation in nuclear fusion devoices, tungsten (W) will undergo transmutation to its near-neighbors in the periodic table, such as rhenium (Re), osmium (Os), etc. The transmutation elements Re and Os will precipitate and form new Re/Os-rich phase, and further significantly degrade the mechanical properties of W. Here, we have investigated the mechanism for the irradiation-induced Re/Os clustering in W using the first-principles method and thermodynamic models. It is found that there is strong attraction between Re/Os and self-interstitial atom (SIA) in W. The SIA can be easily trapped by Re/Os once overcoming a low energy barrier, and form W-Re/Os complex dumbbell. The diffusion energy barrier of W-Re/Os is much lower than that of Re/Os diffusing via mono-vacancy or even vacancy clusters. Further, the W-Re/Os can be easily trapped by the substitutional Re/Os atoms, and form high stable Re-Re/Os-Os dumbbell structure. Most importantly, the Re-Re/Os-Os dumbbell can serve as trapping centre for subsequent interstitial-Re/Os, leading to the growth of Re/Os-rich clusters in W. Our finding suggests an interstitial-mediated mechanism for the irradiation-induced Re/Os clustering in W. This research is supported by the National Magnetic Confinement Fusion Program with Grant No. 2013GB109002, and the National Natural Science Foundation of China with Grant No. 11675011.

EPA RE-Powering Screening Shapefile

Data.gov (United States)

U.S. Environmental Protection Agency — The U.S. Environmental Protection Agency (EPA) Office of Land and Emergency Management (OLEM) Center for Program Analysis (CPA) initiated the RE-Powering America’s...

Indides RE{sub 3}T{sub 2}In{sub 4} (RE = Y, Gd-Tm, Lu; T = Ni, Ru, Rh) with a ZrNiAl superstructure

Energy Technology Data Exchange (ETDEWEB)

Heying, Birgit; Niehaus, Oliver; Rodewald, Ute C.; Poettgen, Rainer [Univ. Muenster (Germany). Inst. fuer Anorganische und Analytische Chemie

2016-07-01

Three series of rare earth-transition metal-indides RE{sub 3}T{sub 2}In{sub 4} (RE=Y, Gd-Tm, Lu; T=Ni, Ru, Rh) were synthesized from arc-melted RE{sub 3}T{sub 2} precursor compounds and indium tear shot in sealed niobium ampoules using different annealing sequences. The new indides crystallize with the hexagonal Lu{sub 3}Co{sub 2}In{sub 4}-type structure, space group P anti 6. All samples were characterized on the basis of Guinier powder patterns and six structures were refined from single crystal X-ray diffractometer data. The RE{sub 3}T{sub 2}In{sub 4} structures are derived from the ZrNiAl type through RE/In ordering, paralleled by a symmetry reduction from P anti 62m to P anti 6. This induces twinning for some of the investigated crystals. The main crystal chemical motifs of the RE{sub 3}T{sub 2}In{sub 4} structures are trigonal prisms of rare earth, respectively indium atoms that are filled by the transition metals.

On Fourier re-expansions

OpenAIRE

Liflyand, E.

2012-01-01

We study an extension to Fourier transforms of the old problem on absolute convergence of the re-expansion in the sine (cosine) Fourier series of an absolutely convergent cosine (sine) Fourier series. The results are obtained by revealing certain relations between the Fourier transforms and their Hilbert transforms.

Re-discovering indigenous knowledge – Ulwazi Lwemveli for ...

African Journals Online (AJOL)

Therefore, the imperative to re-discover and re-store IK cannot be underestimated since building on this knowledge is particularly effective in helping to reach those living in rural communities. This knowledge is often the main asset they control, and certainly one with which they are more familiar. The case studies discussed ...

Electronic structures of ReS2, ReSe2 and TcS2 in the real and the hypothetical undistorted structures

NARCIS (Netherlands)

Fang, CM; Wiegers, GA; Haas, C; deGroot, RA

1997-01-01

The transition-metal dichalcogenides ReX2 (X = Sor Se) and TcS2 with a d(3) electron configuration have distorted; CdCl2 and Cd(OH)(2) structures, respectively, with the Re(Tc) atoms in each layer forming parallelogram-shaped connected clusters (diamond chain). Ab-initio band-structure calculations

Third-Party Evaluation of Petro Tex Hydrocarbons, LLC, ReGen Lubricating Oil Re-refining Process

Energy Technology Data Exchange (ETDEWEB)

Compere, A L [ORNL; Griffith, William {Bill} L [ORNL

2009-04-01

This report presents an assessment of market, energy impact, and utility of the PetroTex Hydrocarbons, LLC., ReGen process for re-refining used lubricating oil to produce Group I, II, and III base oils, diesel fuel, and asphalt. PetroTex Hydrocarbons, LLC., has performed extensive pilot scale evaluations, computer simulations, and market studies of this process and is presently evaluating construction of a 23 million gallon per year industrial-scale plant. PetroTex has obtained a 30 acre site in the Texas Industries RailPark in Midlothian Texas. The environmental and civil engineering assessments of the site are completed, and the company has been granted a special use permit from the City of Midlothian and air emissions permits for the Texas Commission on Environmental Quality.

Investigation of the transport properties and compositions of the Ca{sub 2}RE{sub 7}Pn{sub 5}O{sub 5} series (RE=Pr, Sm, Gd, Dy; Pn=Sb, Bi)

Energy Technology Data Exchange (ETDEWEB)

Forbes, Scott [Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1 (Canada); Yuan, Fang [Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1 (Canada); Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Kosuda, Kosuke; Kolodiazhnyi, Taras [Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Mozharivskyj, Yurij, E-mail: mozhar@mcmaster.ca [Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1 (Canada)

2016-10-15

The Ca{sub 2}RE{sub 7}Pn{sub 5}O{sub 5} phases (RE=Pr, Sm, Gd, Dy; Pn=Sb, Bi) were successfully prepared from high temperature reactions at 1225–1300 °C. These phases maintain the same structure types as the parent RE{sub 9}Pn{sub 5}O{sub 5} phases, except for a Ca/RE mixing. The study and preparation of these phases was motivated by the desire to shift the metallic type properties of the parent RE{sub 9}Pn{sub 5}O{sub 5} phases to a level more suitable for thermoelectric applications. Electrical resistivity measurements performed on pure, bulk samples indicated all phases to be narrow band gap semiconductors or semimetals, supporting the charge balanced electron count of the Ca{sub 2}RE{sub 7}Pn{sub 5}O{sub 5} composition. Unfortunately, all samples are too electrically resistive for any potential usage as thermoelectrics. Electronic band structure calculations performed on idealized RE{sub 9}Pn{sub 5}O{sub 5} structures revealed the presence of a pseudogap at the Fermi level, which is consistent with the observed electrical resistivity and Seebeck coefficient behavior. - Graphical abstract: Ca substitution in RE{sub 9}Pn{sub 5}O{sub 5} leads to charge-balanced Ca{sub 2}RE{sub 7}Pn{sub 5}O{sub 5} phases with semiconducting or semimetallic properties. - Highlights: • The RE{sub 9}Pn{sub 5}O{sub 5} structure may be stabilized with calcium substitution in the form of Ca{sub 2}RE{sub 7}Pn{sub 5}O{sub 5}. • The Ca{sub 2}RE{sub 7}Pn{sub 5}O{sub 5} phases maintain the parent P 4/n structure, albeit with Ca/RE mixing. • The Ca{sub 2}RE{sub 7}Sb{sub 5}O{sub 5} phases behave as semiconductors while Ca{sub 2}RE{sub 7}Bi{sub 5}O{sub 5} are semimetals with electron-electron correlations. • Electronic structure calculations yield a semimetal-like density of states for both Ca{sub 2}RE{sub 7}Sb{sub 5}O{sub 5} and Ca{sub 2}RE{sub 7}Bi{sub 5}O{sub 5}.

Re-injection accelerates groundwater clean up at Fernald, Fluor Fernald, Inc

International Nuclear Information System (INIS)

Dave Brettschneider; William Hertel; Ken Broberg

2000-01-01

A successful one year long, field scale demonstration of the use of groundwater re-infection at Fernald was recently completed bringing DOE one step closer to achieving an accelerated site remediation (DOE 2000). The demonstration marks the end of a several year effort to evaluate whether: re-injection could be conducted efficiently at Fernald, and if the approved aquifer remedy at Fernald would benefit by incorporating re-infection. Evaluation of re-injection technology involved not only technical considerations, but also participation and cooperation of regulators and stakeholders. The demonstration was considered to be unique in that it was integrated into the design of the current approved aquifer remedy and utilized the existing remediation infrastructure. Information collected during the demonstration indicated that re-injection wells could be operated efficiently at Fernald and that the current approved groundwater remedy should be modified to include the use of re-injection

Salvage Re-Irradiation for Recurrent Head and Neck Cancer

International Nuclear Information System (INIS)

Lee, Nancy; Chan, Kelvin; Bekelman, Justin E.; Zhung, Joanne; Mechalakos, James; Narayana, Ashwatha; Wolden, Suzanne; Venkatraman, Ennapadam S.; Pfister, David; Kraus, Dennis; Shah, Jatin; Zelefsky, Michael J.

2007-01-01

Purpose: To present a retrospective review of treatment outcomes for recurrent head and neck (HN) cancer patients treated with re-irradiation (re-RT) at a single medical center. Methods and Materials: From July 1996-September 2005, 105 patients with recurrent HN cancer underwent re-RT at our institution. Sites included were: the neck (n = 21), nasopharynx (n 21), paranasal sinus (n = 18), oropharynx (n = 16), oral cavity (n = 9), larynx (n = 10), parotid (n = 6), and hypopharynx (n = 4). The median prior RT dose was 62 Gy. Seventy-five patients received chemotherapy with their re-RT (platinum-based in the majority of cases). The median re-RT dose was 59.4 Gy. In 74 (70%), re-RT utilized intensity-modulated radiation therapy (IMRT). Results: With a median follow-up of 35 months, 18 patients were alive with no evidence of disease. The 2-year loco-regional progression-free survival (LRPFS) and overall survival rates were 42% and 37%, respectively. Patients who underwent IMRT, compared to those who did not, had a better 2-year LRPF (52% vs. 20%, p < 0.001). On multivariate analysis, non-nasopharynx and non-IMRT were associated with an increased risk of loco-regional (LR) failure. Patients with LR progression-free disease had better 2-year overall survival vs. those with LR failure (56% vs. 21%, p < 0.001). Acute and late Grade 3-4 toxicities were reported in 23% and 15% of patients. Severe Grade 3-4 late complications were observed in 12 patients, with a median time to development of 6 months after re-RT. Conclusions: Based on our data, achieving LR control is crucial for improved overall survival in this patient population. The use of IMRT predicted better LR tumor control. Future aggressive efforts in maximizing tumor control in the recurrent setting, including dose escalation with IMRT and improved chemotherapy, are warranted

Composition and local bonding in RE-Si-M-O-N (M=Mg, Al ; RE=La, Lu) glasses

Energy Technology Data Exchange (ETDEWEB)

Fouquet-Parry, V. [Service de Physique et de Chimie des Surfaces et des Interfaces, DSM/DRECAM/SPCSI, CEA Saclay, 91191 Gif sur Yvette Cedex (France); Paumier, F. [Laboratoire de Metallurgie Physique - UMR 6630 CNRS, Department of Materials Sciences, University of Poitiers (France); Guittet, M.J. [Service de Physique et de Chimie des Surfaces et des Interfaces, DSM/DRECAM/SPCSI, CEA Saclay, 91191 Gif sur Yvette Cedex (France); Gautier-Soyer, M. [Service de Physique et de Chimie des Surfaces et des Interfaces, DSM/DRECAM/SPCSI, CEA Saclay, 91191 Gif sur Yvette Cedex (France)], E-mail: mgautiersoyer@cea.fr; Satet, R.; Hoffmann, M.J. [Institut fuer Keramik im Maschinenbau, Universitaet Karlsruhe (Thailand), Haid-und-Neu-Strasse 7, D 76131 Karlsruhe (Germany); Becher, P.F.; Painter, G.S. [Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN (United States)

2008-05-30

Two series of oxynitride glasses, RE-Si-Mg-O-N (M=Mg, Al ; RE=La, Lu), have been studied by X-Ray photoelectron spectroscopy (XPS). The oxygen 1s photoelectron lineshape reveals a striking difference depending on the rare earth, both in the Mg series and in the Al series. Specifically, the oxygen 1s photoelectron lines of the La doped glasses are broader than the ones of the Lu doped glasses. This result is an experimental evidence that Lu has a larger affinity for oxygen versus nitrogen than La, as theoretically predicted by the first-principles calculations by Painter et al.

Digital Intraoral Imaging Re-Exposure Rates of Dental Students.

Science.gov (United States)

Senior, Anthea; Winand, Curtis; Ganatra, Seema; Lai, Hollis; Alsulfyani, Noura; Pachêco-Pereira, Camila

2018-01-01

A guiding principle of radiation safety is ensuring that radiation dosage is as low as possible while yielding the necessary diagnostic information. Intraoral images taken with conventional dental film have a higher re-exposure rate when taken by dental students compared to experienced staff. The aim of this study was to examine the prevalence of and reasons for re-exposure of digital intraoral images taken by third- and fourth-year dental students in a dental school clinic. At one dental school in Canada, the total number of intraoral images taken by third- and fourth-year dental students, re-exposures, and error descriptions were extracted from patient clinical records for an eight-month period (September 2015 to April 2016). The data were categorized to distinguish between digital images taken with solid-state sensors or photostimulable phosphor plates (PSP). The results showed that 9,397 intraoral images were made, and 1,064 required re-exposure. The most common error requiring re-exposure for bitewing images was an error in placement of the receptor too far mesially or distally (29% for sensors and 18% for PSP). The most common error requiring re-exposure for periapical images was inadequate capture of the periapical area (37% for sensors and 6% for PSP). A retake rate of 11% was calculated, and the common technique errors causing image deficiencies were identified. Educational intervention can now be specifically designed to reduce the retake rate and radiation dose for future patients.

Re-vitalizing an indigenous language

DEFF Research Database (Denmark)

Hansen, Annette Skovsted

2014-01-01

The re-vitalization of indigenous languages depend on political and legal support and the imple-mentation of language rights depend on knowledge of vocabulary and grammar structures of the individual languages. Throughout the nineteenth century world, compilers of dictionaries adapted indigenous...... languages to match standards defined in nation-building and, thereby, enabled latent possibilities for indigenous populations to re-vitalize their languages in connection with the United Nations Year for Indigenous Peoples in 1993, and the first United Nations Decade for Indigenous Peoples, 1995......–2004. This article focuses on dictionaries of the languages of the Ainu populations in the borderlands between the nation-states Japan and Russia. The main argument is that the Ainu Cultural Promotion Act promulgated in 1997 had a significant impact on the production and purpose of Ainu dictionaries...

Successful Enterprise System Re-Implementation

DEFF Research Database (Denmark)

Svejvig, Per

2017-01-01

Achieving success in enterprise systems (ES) implementations is challenging. The success rate is not high in view of the sums invested by many organizations in these companywide systems. The literature is charged with reasons for unsuccessful implementations, such as a lack of top management...... support and insufficient change management. Contrary to this research, empirical data from an ES re-implementation in a Scandinavian high-tech company shows successful implementation despite many problematic shifts in outsourcing partners. Therefore, it is natural to ask: why was the re......-implementation of the ES at SCANDI successful despite the major troubles encountered during the project? Building an analysis based on ten Critical Success Factors (CSFs) combined with an investigation into the institutional structures at play, we present several reasons for the successful implementation. The CSF analysis...

Invention/Re-invention

OpenAIRE

Mera, M.

2009-01-01

This article examines the relationship between texts that are re-invented for different media and/or contexts including: film remakes, prequels and sequels, video games that become films and vice versa, internet mashups, and television series that move across geographical borders. The article points to significant sources in this emerging field and presents some of the challenges that arise in relation to its study. In particular questions of originality, fidelity, repetition and difference a...

Disease elimination and re-emergence in differential-equation models.

Science.gov (United States)

Greenhalgh, Scott; Galvani, Alison P; Medlock, Jan

2015-12-21

Traditional differential equation models of disease transmission are often used to predict disease trajectories and evaluate the effectiveness of alternative intervention strategies. However, such models cannot account explicitly for probabilistic events, such as those that dominate dynamics when disease prevalence is low during the elimination and re-emergence phases of an outbreak. To account for the dynamics at low prevalence, i.e. the elimination and risk of disease re-emergence, without the added analytical and computational complexity of a stochastic model, we develop a novel application of control theory. We apply our approach to analyze historical data of measles elimination and re-emergence in Iceland from 1923 to 1938, predicting the temporal trajectory of local measles elimination and re-emerge as a result of disease migration from Copenhagen, Denmark. Copyright © 2015 Elsevier Ltd. All rights reserved.

Five-Year NRHP Re-Evaluation of Historic Buildings Assessment

Energy Technology Data Exchange (ETDEWEB)

Ullrich, R A; Heidecker, K R

2011-09-12

The Lawrence Livermore National Laboratory (LLNL) 'Draft Programmatic Agreement among the Department of Energy and the California State Historic Preservation Officer Regarding Operation of Lawrence Livermore National Laboratory' requires a review and re-evaluation of the eligibility of laboratory properties for the National Register of Historic Places (NRHP) every five years. The original evaluation was published in 2005; this report serves as the first five-year re-evaluation. This re-evaluation includes consideration of changes within LLNL to management, to mission, and to the built environment. it also determines the status of those buildings, objects, and districts that were recommended as NRHP-eligible in the 2005 report. Buildings that were omitted from the earlier building list, those that have reached 50 years of age since the original assessment, and new buildings are also addressed in the re-evaluation.

Sparse Contextual Activation for Efficient Visual Re-Ranking.

Science.gov (United States)

Bai, Song; Bai, Xiang

2016-03-01

In this paper, we propose an extremely efficient algorithm for visual re-ranking. By considering the original pairwise distance in the contextual space, we develop a feature vector called sparse contextual activation (SCA) that encodes the local distribution of an image. Hence, re-ranking task can be simply accomplished by vector comparison under the generalized Jaccard metric, which has its theoretical meaning in the fuzzy set theory. In order to improve the time efficiency of re-ranking procedure, inverted index is successfully introduced to speed up the computation of generalized Jaccard metric. As a result, the average time cost of re-ranking for a certain query can be controlled within 1 ms. Furthermore, inspired by query expansion, we also develop an additional method called local consistency enhancement on the proposed SCA to improve the retrieval performance in an unsupervised manner. On the other hand, the retrieval performance using a single feature may not be satisfactory enough, which inspires us to fuse multiple complementary features for accurate retrieval. Based on SCA, a robust feature fusion algorithm is exploited that also preserves the characteristic of high time efficiency. We assess our proposed method in various visual re-ranking tasks. Experimental results on Princeton shape benchmark (3D object), WM-SRHEC07 (3D competition), YAEL data set B (face), MPEG-7 data set (shape), and Ukbench data set (image) manifest the effectiveness and efficiency of SCA.

Sol–gel synthesis of long-lasting phosphors CdSiO3: Mn2+, RE3+ (RE = Tb, Eu, Nd) and luminescence mechanism research

International Nuclear Information System (INIS)

Qu, Xiaofei; Cao, Lixin; Liu, Wei; Su, Ge; Wang, Pingping; Schultz, Isabel

2012-01-01

Highlights: ► New long-lasting CdSiO 3 : Mn 2+ , RE 3+ (RE = Tb, Eu, Nd) phosphors were synthesized by a sol–gel method. ► The afterglow performance of the CdSiO 3 : Mn 2+ , Eu 3+ phosphor was the best. ► The role of RE 3+ co-doped into the CdSiO 3 : Mn 2+ matrix was discussed in this paper. -- Abstract: Mn 2+ and RE 3+ (RE = Tb, Eu, Nd) co-doped CdSiO 3 orange phosphors were prepared at 1050 °C by a sol–gel method. The phase and crystallinity of the synthesized materials were investigated by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The luminescence characteristics were analyzed using photoluminescence (PL) spectra, afterglow decay curves, long-lasting phosphorescence spectra, and thermoluminescence (TL) spectra. Due to the difference in co-doped rare earth ionic radii, it varied greatly in trap density and trap depth caused by the different defects deriving from RE 3+ ions co-doping into the CdSiO 3 : Mn 2+ host. The afterglow intensity and time for these samples increased as follows: CdSiO 3 : Mn 2+ 0.2%, Nd 3+ 0.8% 3 : Mn 2+ 0.4%, Tb 3+ 0.8% 3 : Mn 2+ 0.4%, Eu 3+ 0.3%. CdSiO 3 : Mn 2+ 0.4%, Eu 3+ 0.3% had the best afterglow properties, which could be due to the proper traps formed by Eu 3+ ions co-doping into the host. The role of RE 3+ co-doped into the CdSiO 3 : Mn 2+ matrix and the possible long-lasting phosphorescence process was also discussed in this paper.

Factors having implications on re-retinal detachments after silicone oil removal

Directory of Open Access Journals (Sweden)

Manish P Nagpal

2012-01-01

Full Text Available Aim: To investigate factors having implications on re-retinal detachments (reRD after silicone oil removal (SOR. Materials and Methods: A retroprospective study of 412 eyes (with attached retina after vitrectomy with silicone oil for rhegmatogenous RD which underwent SOR was conducted and were followed up for six months after SOR. They were studied for various factors like encirclage, 360° retinopexy, oil emulsification at the time of SOR, duration of oil tamponade and previous retinal surgeries prior to SOR with their implications on reRD after SOR. Results: Encirclage, 360 laser barrage, both, emulsification of oil (P=0.021, P=0.001, P=0.001, P=0.001, respectively were associated with lower risks of reRD after SOR whereas duration of tamponade (P=0.980 was not. Conclusion: Factors like encirclage, 360 retinopexy, their combination, oil emulsification reduced the incidence of re RD after SOR whereas duration of tamponade does not have statistical significant correlation with re RD after SOR.

Re-Envisioning Human Rights in the Light of Arendt and Rancière: Towards an Agonistic Account of Human Rights Education

Science.gov (United States)

Zembylas, Michalinos

2017-01-01

This article takes up Arendt's "aporetic" framing of human rights as well as Rancière's critique and suggests that reading them together may offer a way to re-envision human rights and human rights education (HRE)--not only because they make visible the perplexities of human rights, but also in that they call for an agonistic…

A review of irradiation induced re-solution in oxide fuels

International Nuclear Information System (INIS)

Turnbull, J.A.

1980-01-01

The paper reviews the existing experimental evidence for irradiation induced re-solution and also possible explanations for the mechanism. The importance of re-solution is considered with regard to intragranular bubbles and the accumulation of gas on grain boundaries. It is concluded that re-solution is most effective at low temperatures and could account for the present concern over gas release in high burn-up water reactor fuel assemblies. (author)

Study on the pharmacal of 186,188Re-SZ39

International Nuclear Information System (INIS)

Zu Jianhua; Wu Yuanfang; Dong Mo; Li Huiyuan; ZhangYulong

2000-01-01

The stability, immunocompetence and cytotoxicity in tumor as well as tumor inhibiting rate of 186,188 Re-SZ39 are investigated. The results indicate that 186,188 Re-SZ39 is stable in vivo by imaging and the volume of tumor of nude mice reduced obviously. So 186,188 Re-SZ39 has a strong cytotoxicity effect against glioma cells and is of good prospect as immuno-radiotherapeutic agent

In vitro structure-activity relationship of Re-cyclized octreotide analogues

Energy Technology Data Exchange (ETDEWEB)

Dannoon, Shorouk F. [Department of Chemistry, University of Missouri, Columbia, MO 65211 (United States); Bigott-Hennkens, Heather M. [Department of Veterinary Medicine and Surgery, University of Missouri, Columbia, MO 65211 (United States); Ma Lixin [Department of Radiology, University of Missouri, Columbia, MO 65211 (United States); International Institute of Nano and Molecular Medicine, University of Missouri, Columbia, MO 65211 (United States); Nuclear Science and Engineering Institute, University of Missouri, Columbia, MO 65211 (United States); Research Service, Harry S. Truman Memorial Veterans' Hospital, Columbia, MO 65201 (United States); Gallazzi, Fabio [Structural Biology Core, University of Missouri, Columbia, MO 65211 (United States); Lewis, Michael R., E-mail: lewismic@missouri.ed [Department of Veterinary Medicine and Surgery, University of Missouri, Columbia, MO 65211 (United States); Department of Radiology, University of Missouri, Columbia, MO 65211 (United States); Nuclear Science and Engineering Institute, University of Missouri, Columbia, MO 65211 (United States); Research Service, Harry S. Truman Memorial Veterans' Hospital, Columbia, MO 65201 (United States); Jurisson, Silvia S., E-mail: jurissons@missouri.ed [Department of Chemistry, University of Missouri, Columbia, MO 65211 (United States); Department of Radiology, University of Missouri, Columbia, MO 65211 (United States); Nuclear Science and Engineering Institute, University of Missouri, Columbia, MO 65211 (United States)

2010-07-15

Introduction: Development of radiolabeled octreotide analogues is of interest for targeting somatostatin receptor (SSTR)-positive tumors for diagnostic and therapeutic purposes. We are investigating a direct labeling approach for incorporation of a Re ion into octreotide analogues, where the peptide sequences are cyclized via coordination to Re rather than through a disulfide bridge. Methods: Various octreotide analogue sequences and coordination systems (e.g., S{sub 2}N{sub 2} and S{sub 3}N) were synthesized and cyclized with nonradioactive Re. In vitro competitive binding assays with {sup 111}In-DOTA-Tyr{sup 3}-octreotide in AR42J rat pancreatic tumor cells yielded IC{sub 50} values as a measure of SSTR affinity of the Re-cyclized analogues. Three-dimensional structures of Re-cyclized Tyr{sup 3}-octreotate and its disulfide-bridged analogue were calculated from two-dimensional NMR experiments to visualize the effect of metal cyclization on the analogue's pharmacophore. Results: Only two of the 11 Re-cyclized analogues investigated showed moderate in vitro binding affinity toward somatostatin subtype 2 receptors. Three-dimensional molecular structures of Re- and disulfide-cyclized Tyr{sup 3}-octreotate were calculated, and both of their pharmacophore turns appear to be very similar with minor differences due to metal coordination to the amide nitrogen of one of the pharmacophore amino acids. Conclusions: Various Re-cyclized analogues were developed and analogue 4 had moderate affinity toward somatostatin subtype 2 receptors. In vitro stable studies that are in progress showed stable radiometal cyclization of octreotide analogues via NS{sub 3} and N{sub 2}S{sub 2} coordination forming five- and six-membered chelate rings. In vivo biodistribution studies are underway of {sup 99m}Tc-cyclized analogue 4.

Final Technical Report, reEnergize Program

Energy Technology Data Exchange (ETDEWEB)

Wamstad-Evans, Kristi [City of Omaha; Williams, Eric [City of Omaha; Kubicek, Jason [City of Omaha

2013-12-27

The reEnergize Program helped to build a market for residential and commercial energy evaluations and upgrades. The program provided incentives to encourage participants to save energy, save money, and make their homes and businesses more safe, healthy, and comfortable. As part of the Better Buildings Neighborhood Program (BBNP), the successful investment of this $10 million grant toward market development was the first grant funding collaboration between the cities of Omaha and Lincoln. Through more than three years of work, thousands of participants, contractors, and community members worked together to make the reEnergize Program a demonstration of how to “Build Energy Smart Communities.”

Phase relations and superconductivity in the binary Re-Si system

International Nuclear Information System (INIS)

Jorda, J.L.; Ishikawa, M.; Muller, J.

1982-01-01

The phase diagram of the Re-Si system was reinvestigated by means of high temperature methods of analysis. Several modifications were found to the existing diagram. An extended rhenium solid solution (up to 10 at.% Si) was established with a rapid quenching technique. Within this terminal solid solution, the superconducting transition temperature increased from 1.7 to 5.2 K. The phase corresponding to the Re 5 Si 3 compound was homogeneous at 33 at.% Si. The peritectically formed equiatomic compound decomposed eutectoidally at 1650 0 C and was superconducting at 1.5 K. The compound ReSi 2 was found to be off stoichiometric, occurring at the composition ReSisub(1.8). (Auth.)

Re-Engineering Marketing (RM

Directory of Open Access Journals (Sweden)

Bozhidar Iv. Hadzhiev

2010-12-01

Full Text Available La globalización, el auge de la economía, el progreso de la e-net economía, y el gran dinamismo de las relaciones comerciales se están constituyendo como una función progresiva en constante crecimiento, predeterminando la utilización de unas pocas nuevas oportunidades para aumentar la eficacia de las empresas. Llegados a este punto, a través del prisma de los métodos de reingeniería en el presente artículo se muestran algunos problemas básicos y las oportunidades existentes para la Reingeniería del Marketing (RM.Globalization, the rise of the economy, the progress of the e-net economy, and the high dynamics of business relationships are developing as one of the permanently rising progressive functions, predetermining the use of a few new opportunities for increasing effectiveness of the industry companies. At this point, through the prism of Re-engineering methods, a few basic problems and opportunities for Re-engineering Marketing (RM are presented in this paper.

Performance Spread of Re-entrant System Structures

DEFF Research Database (Denmark)

Nielsen, Erland Hejn

2001-01-01

-to-day operations. It might well be the case that those badly behaving systems merely constitute a set with a measure of almost zero. The key parameters that determine whether a re-entrant system is one of the badly behaving ones are essentially flow-structure, processing times and rules of priority between...... satisfactory. They are all vulnerable to certain job flow patterns and process time settings to a significant degree. The LBFS priority policy therefore presents itself not only as a stable, but also the safe and robust choice par excellence in relation to the control of re-entrant systems....... different job-classes on specific machines. Let us therefore face a re-entrant flow-shop production set-up in an order-driven production system, by which I mean that the flow structure relative to each production-batch shows great variability and where the size of the individual batches is quite large. One...

Kanegelo ya Nimirode: Re lebelela diphihlelelo t�a gagwe ka lefsa

Directory of Open Access Journals (Sweden)

Elelwani B. Farisani

2011-03-01

Full Text Available Kanegelo ya Hama/Nimirode e �omi�it�we go gatelela Bathobaso ba Afrika-Borwa le ba Amerika. Taodi�wana ye e lekola Nimirode ka lefsa le go t�ea magato a go bu�et�a seriti sa gagwe le sa Bathobaso sekeng.Seo se tlo dirwa ka dikgato t�e tlhano ka mo tlase. Sa mathomo, re tlo lekola dimelo t�a bana ba Noage, go kwe�i�a Nimirode, yo e lego yena �edi ye kgolo ya taodi�wana ye. Sa bobedi re tlo lebelela ka fao bangwadi ba bangwe ba t�welet�ago seswant�ho sa go befa sa Nimirode. Sa boraro, re tlo sekaseka tiri�o ya kanegelo ya Hama/Nimirode go gatelela le go dira Bathobaso makgoba. Sa bone, re tlo sekaseka diphihlelelo le dikatlego t�a Nimirode. Mo re tlo tsepelela diphihlelelo t�a gagwe t�e tharo t�e kgolo bjalo ka go ba mmu�i wa maemo, motsomi yo maatla le moagi. Nepo ya karolo ye ke go ganet�ana le tshekatsheko ya go se be botse ye e nepilwego Nimirode nakong ya go feta. Re tlo tlalelet�a ka go fa tshekatsheko ye e tebilego ya thogako godimo ga Hama/Ku�e/Nimirode. Sa bohlano, ebile e le sa mafelelo, re tlo t�welet�a nyanyeng bohlokwa bja kanegelo ya Nimirode go bao ba bego ba gatelet�we le go ba makgoba ka baka la temana ye. Re tlo nepi�a Afrika-Borwa.

The re-identification risk of Canadians from longitudinal demographics

Science.gov (United States)

2011-01-01

Background The public is less willing to allow their personal health information to be disclosed for research purposes if they do not trust researchers and how researchers manage their data. However, the public is more comfortable with their data being used for research if the risk of re-identification is low. There are few studies on the risk of re-identification of Canadians from their basic demographics, and no studies on their risk from their longitudinal data. Our objective was to estimate the risk of re-identification from the basic cross-sectional and longitudinal demographics of Canadians. Methods Uniqueness is a common measure of re-identification risk. Demographic data on a 25% random sample of the population of Montreal were analyzed to estimate population uniqueness on postal code, date of birth, and gender as well as their generalizations, for periods ranging from 1 year to 11 years. Results Almost 98% of the population was unique on full postal code, date of birth and gender: these three variables are effectively a unique identifier for Montrealers. Uniqueness increased for longitudinal data. Considerable generalization was required to reach acceptably low uniqueness levels, especially for longitudinal data. Detailed guidelines and disclosure policies on how to ensure that the re-identification risk is low are provided. Conclusions A large percentage of Montreal residents are unique on basic demographics. For non-longitudinal data sets, the three character postal code, gender, and month/year of birth represent sufficiently low re-identification risk. Data custodians need to generalize their demographic information further for longitudinal data sets. PMID:21696636

Thermal decomposition of RE(C2H5CO2)3·H2O (RE = Dy, Tb, Gd, Eu and Sm)

DEFF Research Database (Denmark)

Grivel, Jean-Claude

2014-01-01

The thermal decomposition of Dy(III), Tb(III), Gd(III), Eu(III), and Sm(III) propionate monohydrates was studied in argon by means of simultaneous differential thermal analysis and thermogravimetry, infrared-spectroscopy, X-ray diffraction, and optical microscopy. After dehydration, which takes......, an intermediate stage involving a RE2O(C2H5CO2)4 composition was evidenced in the case of the Eu- and Sm-propionates. For all compounds, further decomposition of RE2O2CO3 into the corresponding sesquioxides (RE2O3) is accompanied by the release of CO2. The thermal decomposition of Dy- and Tb-propionates occurs...

Weak ferromagnetism in Re0.67Ca0.33FeO3 (Re=La, Sm, Gd) nanoparticles

International Nuclear Information System (INIS)

Li Jiangong; Kou Xinli; Qin Yong; He Haiying

2003-01-01

Perovskite-type complex ferrite Re 0.67 Ca 0.33 FeO 3 (Re=La, Sm, Gd) nanoparticles of nearly the same particle size were prepared using sol-gel method. The influence of rare-earth ions on weak ferromagnetism in the Re 0.67 Ca 0.33 FeO 3 nanoparticles has been studied. The spontaneous magnetization M s of the Sm 0.67 Ca 0.33 FeO 3 nanoparticles is greater than that of Gd 0.67 Ca 0.33 FeO 3 nanoparticles; and M s of Gd 0.67 Ca 0.33 FeO 3 nanoparticles is greater than that of La 0.67 Ca 0.33 FeO 3 nanoparticles. The ferromagnetic component arising from the Fe sublattice increases with the decreasing rare-earth ionic radii. The magnetization of the rare-earth ions in the Sm 0.67 Ca 0.33 FeO 3 nanoparticles is smaller than that in the Gd 0.67 Ca 0.33 FeO 3 nanoparticles. The influences of the geometric and intrinsic magnetic characters of rare-earth ions as well as the particle size of the nanoparticles on weak ferromagnetism are discussed

A comparative genome analysis of Cercospora sojina with other members of the pathogen genus Mycosphaerella on different plant hosts

Directory of Open Access Journals (Sweden)

Fanchang Zeng

2017-09-01

Full Text Available Fungi are the causal agents of many of the world's most serious plant diseases causing disastrous consequences for large-scale agricultural production. Pathogenicity genomic basis is complex in fungi as multicellular eukaryotic pathogens. Here, we report the genome sequence of C. sojina, and comparative genome analysis with plant pathogen members of the genus Mycosphaerella (Zymoseptoria. tritici (synonyms M. graminicola, M. pini, M. populorum and M. fijiensis - pathogens of wheat, pine, poplar and banana, respectively. Synteny or collinearity was limited between genomes of major Mycosphaerella pathogens. Comparative analysis with these related pathogen genomes indicated distinct genome-wide repeat organization features. It suggests repetitive elements might be responsible for considerable evolutionary genomic changes. These results reveal the background of genomic differences and similarities between Dothideomycete species. Wide diversity as well as conservation on genome features forms the potential genomic basis of the pathogen specialization, such as pathogenicity to woody vs. herbaceous hosts. Through comparative genome analysis among five Dothideomycete species, our results have shed light on the genome features of these related fungi species. It provides insight for understanding the genomic basis of fungal pathogenicity and disease resistance in the crop hosts.

Revision Total Hip Arthoplasty: Factors Associated with Re-Revision Surgery

OpenAIRE

Khatod, M; Cafri, G; Inacio, MCS; Schepps, AL; Paxton, EW; Bini, SA

2015-01-01

The survivorship of implants after revision total hip arthroplasty and risk factors associated with re-revision are not well defined. We evaluated the re-revision rate with use of the institutional total joint replacement registry. The purpose of this study was to determine patient, implant, and surgeon factors associated with re-revision total hip arthroplasty.A retrospective cohort study was conducted. The total joint replacement registry was used to identify patients who had undergone revi...

Re-Emergent Tremor of Parkinson's Disease Masquerading as Essential Tremor

Directory of Open Access Journals (Sweden)

Sarah Morgan

2016-03-01

Full Text Available Background: The re-emergent tremor of Parkinson’s disease (PD is generally recognized as a postural tremor. Phenomenology Shown: A PD patient with a re-emergent tremor occurring during a task (spiral drawing, which on the surface produced a tremor that resembled that of essential tremor (ET. Educational Value: Researchers and clinicians should be aware of features of this re-emergent tremor to help distinguish it from that of ET.

ions (RE = La, Pr, Nd, Sm, Gd and Dy)

Indian Academy of Sciences (India)

) zirconia), tendency of phase transformation (tetragonal to monoclinic () zirconia) and lattice strain were studied with mechanical property e.g. tensile strength of sol–gel derived ZrO2–2 mol% RE2O3 (RE = La, Pr, Nd, Sm, Gd and Dy) spun ...

'Fit or unfit': theorie en praktijk van re-integratie

NARCIS (Netherlands)

Sol, C.C.A.M.; Kok, K.

2014-01-01

If the objective of creating a labour market with opportunity for unemployed is to be achieved through re-employment programmes, understanding the mechanisms and conditions at work is essential. Following ‘Realistic Evaluation’ the authors focus on theories in use behind re-employment programmes by

XPS investigations of tribolayers formed on TiN and (Ti,Re)N coatings

Energy Technology Data Exchange (ETDEWEB)

Oktay, Serkan; Kahraman, Zafer; Urgen, Mustafa; Kazmanli, Kursat, E-mail: kursat@itu.edu.tr

2015-02-15

Graphical abstract: - Highlights: • The (Ti,Re)N coating (8 ± 1.9 at.% Re) consisted of TiN and ReNx (x > 1.33) phases. • TiO{sub 2} provided low friction coefficient to TiN coating at 150 °C. • Re addition to TiN drastically dropped the friction coefficients to 0.17–0.22. • Re{sub 2}O{sub 7} provided very low friction coefficient to (Ti,Re)N coating. • Re addition to TiN improved the wear behavior. - Abstract: TiN and (Ti,Re)N coatings were deposited on high-speed-steel substrates by a hybrid coating system composed of cathodic arc PVD and magnetron sputtering techniques. In order to keep rhenium content low (8 ± 1.9 at.%) in the coating, magnetron sputtering technique was utilized to evaporate rhenium. The (Ti,Re)N coating consisted of TiN and ReN{sub x} (x > 1.33) phases. The hardness of TiN and (Ti,Re)N were 31 GPa and 29 GPa ( ± 2 GPa), respectively. Tribological behaviors of the samples were tested against Al{sub 2}O{sub 3} balls at 21 °C (RT) and 150 °C (HT) by reciprocating wear technique. The tribolayers were analyzed by XPS technique. Friction coefficients of TiN were 0.56, 0.35 for 21 °C and 150 °C tests, respectively. Rhenium addition to TiN drastically dropped the friction coefficients to 0.22 and 0.17 for RT and HT samples. Rhenium addition also improved the wear resistance of the coating at both test temperatures. For TiN, main oxide component of the tribolayers was Ti{sub 2}O{sub 3} for RT tests and TiO{sub 2} for HT tests. The oxide layer formed on (Ti,Re)N were the mixture of TiO{sub 2}, Ti−O−N, ReO{sub 2} and Re{sub 2}O{sub 7} for both test temperatures. Re{sub 2}O{sub 7} provided very low friction coefficient to (Ti,Re)N. The findings are consistent with the crystal chemistry approach.

RE-SONANCE--IJu-ne

Indian Academy of Sciences (India)

this title. The chapter on physics and experi- mental methods is perhaps the weakest and might have been better left out or re-written from a perspective that better serves the title and the aims of the rest of the book. There are problems with the proof reading e.g., titanium nitride described as TiC, phrases in sentences.

[Study on mercury re-emissions during fly ash utilization].

Science.gov (United States)

Meng, Yang; Wang, Shu-Xiao

2012-09-01

The amount of fly ash produced during coal combustion is around 400 million tons per year in China. About 65%-68% of fly ash is used in building material production, road construction, architecture and agriculture. Some of these utilization processes include high temperature procedures, which may lead to mercury re-emissions. In this study, experiments were designed to simulate the key process in cement production and steam-cured brick production. A temperature programmed desorption (TPD) method was used to study the mercury transformation in the major utilization processes. Mercury re-emission during the fly ash utilization in China was estimated based on the experimental results. It was found that mercury existed as HgCl2 (Hg2 Cl2), HgS and HgO in the fly ash. During the cement production process, more than 98% of the mercury in fly ash was re-emitted. In the steam-curing brick manufacturing process, the average mercury re-emission percentage was about 28%, which was dominated by the percentage of HgCl2 (Hg2 Cl2). It is estimated that the mercury re-emission during the fly ash utilization have increased from 4.07 t in 2002 to 9.18 t in 2008, of which cement industry contributes about 96.6%.

Pelvic re-irradiation using stereotactic ablative radiotherapy (SABR): A systematic review.

Science.gov (United States)

Murray, Louise Janet; Lilley, John; Hawkins, Maria A; Henry, Ann M; Dickinson, Peter; Sebag-Montefiore, David

2017-11-01

To perform a systematic review regarding the use of stereotactic ablative radiotherapy (SABR) for the re-irradiation of recurrent malignant disease within the pelvis, to guide the clinical implementation of this technique. A systematic search strategy was adopted using the MEDLINE, EMBASE and Cochrane Library databases. 195 articles were identified, of which 17 were appropriate for inclusion. Studies were small and data largely retrospective. In total, 205 patients are reported to have received pelvic SABR re-irradiation. Dose and fractionation schedules and re-irradiated volumes are highly variable. Little information is provided regarding organ at risk constraints adopted in the re-irradiation setting. Treatment appears well-tolerated overall, with nine grade 3 and six grade 4 toxicities amongst thirteen re-irradiated patients. Local control at one year ranged from 51% to 100%. Symptomatic improvements were also noted. For previously irradiated patients with recurrent pelvic disease, SABR re-irradiation could be a feasible intervention for those who otherwise have limited options. Evidence to support this technique is limited but shows initial promise. Based on the available literature, suggestions for a more formal SABR re-irradiation pathway are proposed. Prospective studies and a multidisciplinary approach are required to optimise future treatment. Copyright © 2017 Elsevier B.V. All rights reserved.

An Exploratory Study on the Re-finding Behavior on the Web

Directory of Open Access Journals (Sweden)

Hsiao-Tieh Pu

2010-06-01

Full Text Available It is common for users to relocate information previously found on the web. However, their search behaviors in initial finding and the subsequent re-finding may differ due to the dynamic nature and contextual diversity of the web. This study used experiment, observation, interview, and questionnaires to investigate the characteristics of re-finding behavior and compare users’ performance in finding and re-finding. Though not significantly different, the study participants used more search tools, combined various strategies to obtain contextual clues of finding process, utilized more complex search tactics, and had more interactions with search engines used. Findings also show that participants spent less time in re-finding than in finding, yet the cognitive loading and difficulties increased in re-finding. Participants were satisfied with the results obtained in re-finding, but they also claimed that the search performance would be better if the system offered more functions to support recall of previous search results. Participants’ satisfaction with search performance also varied by task type. Based on the findings, this study recommends that re-finding efficiency may be improved by enhancing recall functionalities in browsers and by using personal information management tools. [Article content in Chinese; Extended abstract in English

Synthesis and photoluminescence properties of microcrystalline Sr{sub 2}ZnWO{sub 6}:RE{sup 3+} (RE = Eu, Dy, Sm and Pr) phosphors

Energy Technology Data Exchange (ETDEWEB)

Dabre, K.V. [Department of Physics, Arts, Commerce and Science College, Koradi, Nagpur 441111 (India); Park, K. [Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 143-747 (Korea, Republic of); Dhoble, S.J., E-mail: sjdhoble@rediffmail.com [Department of Physics, R.T.M. Nagpur University, Nagpur 440033 (India)

2014-12-25

Graphical abstract: CIE chromaticity coordinate diagram (1931) indicating different colors of Sr{sub 2}ZnWO{sub 6}:RE{sup 3+} (RE = Eu (a), Dy (b and c), Sm (d–f) and Pr (g and h)) phosphor under different excitation 466 nm (a), 312 nm (b), 454 nm (c), 313 nm (d), 408 nm (e), 482 nm (f), 315 nm (g) and 450 nm (h). - Highlights: • Microcrystalline Sr{sub 2}ZnWO{sub 6}:RE{sup 3+} (RE = Eu, Dy, Sm and Pr) phosphors were synthesized by solid state method. • Photoluminescence properties of phosphor were investigated. • Color of the phosphor for different excitation has been verified by chromaticity diagram. • The host absorption and energy transfer were investigated. - Abstract: The novel microcrystalline Sr{sub 2}ZnWO{sub 6}:RE{sup 3+} (RE = Eu, Dy, Sm and Pr) phosphors were synthesized by solid-state reaction method at 1250 °C and their photoluminescence properties were investigated. The Eu{sup 3+} and Dy{sup 3+} activated phosphors show intense red (616 nm) and yellow (574 nm) emission respectively; which indicate that the rare earth ions are substituted at non-centrosymmetric site in the host lattice. Near white (Dy{sup 3+}) and reddish-orange (Sm{sup 3+}) emissions of rare earth ions in the host lattice show strong host absorption and energy transfer from the host to activator ion. Pr{sup 3+} activated phosphor shows a series of emission peaks in the visible region with the most intense peak in the blue region at 491 and 499 nm.

Developments with melt spun RE-Fe-B powder for bonded magnets

International Nuclear Information System (INIS)

Brown, D.N.; Chen, Z.; Guschl, P.; Campbell, P.

2006-01-01

Rapidly quenched isotropic rare earth iron boride (RE-Fe-B) powders have found many applications throughout the electronics, automotive and white goods industries. The magnetic performance, thermal stability, corrosion resistance and processability of a powder are important factors when selecting a RE-Fe-B powder for a particular application. For electronic devices that operate at ambient temperatures, high remanence (B r ) tends to be a priority and RE 2 Fe 14 B/α-Fe nanocomposite powder magnets are favoured. Alternatively, automotive applications tend to require greater thermal stability and corrosion resistance, which are satisfied by single-phase RE 2 Fe 14 B powder magnets with higher intrinsic coercivity (H ci ). This article reviews the performance of commercially available rapidly solidified RE-Fe-B powders and recent developments made to address the demands of applications

Thermochemical Properties of the Complexes RE(HSal)3·2H2O (RE=La, Ce, Pr, Nd, Sm)

Institute of Scientific and Technical Information of China (English)

无

2006-01-01

Five solid rare earth salicylate complexes were synthesized by low hydrated lathanide chloride and salicylic acid. The complexes in this experiment were identified as the general formula RE(Hsal)3·2H2O(RE=La, Ce, Pr, Nd, Sm) by elemental analysis and EDTA volumetric analysis. IR spectra of the complexes show that carboxyl of salicylic acid coordinates to RE3+ ions. Electrochemical behaviors of the complexes on the glass-carbon electrode were researched with cyclic voltammetry (CV). It is indicated that the electrochemical process of the complexes is a one-electron redox process and the electrochemical reversibility of complexes is less than that of the lanthanide chlorides. The constant-volume combustion energies of complexes, ΔcU, were determined with a precise rotating-bomb calorimeter at 298.15 K. Their standard molar enthalpies of combustion, ΔcHθm, and standard molar enthalpies of formation, ΔfHθm, were calculated.

Telling Parents You're Pregnant

Science.gov (United States)

... Putting your feelings into words takes plenty of maturity and it's not easy to do. Don't worry if the words don't come out perfectly or if you cry or get emotional as you're saying them. It can help ...

Tc and Re Behavior in Borosilicate Waste Glass Vapor Hydration Tests

International Nuclear Information System (INIS)

McKeown, David A.; Buechele, Andrew C.; Pegg, Ian L.; Lukens, Wayne W.; Shuh, David K.

2007-01-01

Technetium (Tc), found in some nuclear wastes, is of particular concern with regard to long-term storage, because of its long-lived radioactivity and high mobility in the environment. Tc and rhenium (Re), commonly used as a non-radioactive surrogate for Tc, were studied to assess their behavior in borosilicate glass under hydrothermal conditions in the Vapor Hydration Test (VHT). X-ray absorption spectroscopy (XAS) and scanning electron microscopy (SEM) measurements were made on the original Tc- and Re-containing glasses and their corresponding VHT samples, and show different behavior for Tc and Re under VHT conditions. XAS indicates that, despite starting with different Tc(IV) and Tc(VII) distributions in each glass, the VHT samples have 100% Tc(IV)O 6 environments. SEM shows complete alteration of the original glass, Tc enrichment near the sample surface, and Tc depletion in the center. Perrhenate (Re(VII)O 4 - ) is dominant in both Re-containing samples before and after the VHT, where Re is depleted near the VHT sample surface and more concentrated toward the center. (authors)

Enhancement of CdSiO3: Tb3+ green long-lasting phosphors by co-doping with Re3+ (Re3+=Gd3+, Y3+, La3+) ions

International Nuclear Information System (INIS)

Zeng, Wei; Wang, Yuhua; Han, Shaochun; Chen, Wenbo; Li, Gen

2014-01-01

CdSiO 3 : Tb 3+ , Re 3+ long-lasting phosphors were synthesized by the conventional high temperature solid-state method. A green-light phosphorescence phenomenon, which was associated with the 5 D 4 → 7 F J (J=6, 5, 4, 3) transitions of the Tb 3+ ion, was observed. Introduction of Re 3+ (Re 3+ =Gd 3+ , Y 3+ , La 3+ ) ions, which deepens the depth (E t ) or/and increases the density (n 0 ) of traps, greatly improved the afterglow properties of CdSiO 3 : Tb 3+ . Possible mechanism of CdSiO 3 : Tb 3+ , Re 3+ was discussed in this work. - Highlights: • CdSiO 3 : Tb 3+ , Re 3+ samples enrich the color of long-lasting afterglow phosphors in CdSiO 3 host. • Both the afterglow intensity and the lasting time are greatly enhanced for the co-doped samples, especially for Cd 0.96 SiO 3 : Tb 0.03 3+ , La 0.01 3+ . • Introduction of Re 3+ (Re 3+ =Gd 3+ , Y 3+ , La 3+ ) ions, which deepens the depth (E t ) or increase density(n 0 ) of traps, greatly improved the afterglow properties of CdSiO 3 : Tb 3+

Film grain synthesis and its application to re-graining

Science.gov (United States)

Schallauer, Peter; Mörzinger, Roland

2006-01-01

Digital film restoration and special effects compositing require more and more automatic procedures for movie regraining. Missing or inhomogeneous grain decreases perceived quality. For the purpose of grain synthesis an existing texture synthesis algorithm has been evaluated and optimized. We show that this algorithm can produce synthetic grain which is perceptually similar to a given grain template, which has high spatial and temporal variation and which can be applied to multi-spectral images. Furthermore a re-grain application framework is proposed, which synthesises based on an input grain template artificial grain and composites this together with the original image content. Due to its modular approach this framework supports manual as well as automatic re-graining applications. Two example applications are presented, one for re-graining an entire movie and one for fully automatic re-graining of image regions produced by restoration algorithms. Low computational cost of the proposed algorithms allows application in industrial grade software.

Evaluation method of iodine re-evolution from an in-containment water pool after a loss of coolant accident, Part II: Evaluation of pH and iodine re-evolution

International Nuclear Information System (INIS)

Kim, Tae Hyeon; Jeong, Ji Hwan

2016-01-01

Highlights: • It is required to evaluate re-evolved iodine from sump water after LOCA. • Transport of iodine and chemicals influencing pH were analyzed using CFD. • Chemical conditions of the iodine-rich region suppress iodine re-evolution. • The current evaluation method for I 2 re-evolution is excessively conservative. - Abstract: Radioactive iodine that is released during a postulated loss of coolant accident is dissolved into the containment spray water and transported into the in-containment refueling water storage tank (IRWST). The re-evolution of iodine from the water is a safety concern. In this study, three-dimensional computational fluid dynamics (CFD) analyses are conducted in order to analyze the transport of chemical species including iodine in the IRWST and to calculate the amount of iodine that re-evolves from the IRWST water. The CFD analyses demonstrate that the pH of water is high where the iodine concentration is high. Considering that the creation rate of molecular iodine declines as the pH increases, it can be understood that the iodine re-evolution is not so strong in practical situations because the chemical conditions of the iodine-rich region suppress the re-evolution of the iodine. In addition, four different methods for evaluating the amount of re-evolved iodine are examined. The amount of re-evolved iodine calculated using the total-volume-average values, which are currently used for safety analyses, appear to be significantly higher than those determined using other methods. The amount of re-evolved iodine estimated using a realistic method with a conservative assumption of volatilization appears to be approximately one thousandth of that evaluated using the current method. This implies that the current method is very conservative.

A novel steel RE-borosulphurizing and mechanical properties of the produced RE-borosulfide layer

Science.gov (United States)

Wang, Dong; Li, Yun-dong; Zhang, Xiu-li

2013-07-01

In this study, 45# carbon steels were boronized, borosulphurized and RE-borosulphurized at 950 °C for 6 h, respectively. The samples were then characterized by scanning electron microscopy, X-ray diffraction, Auger electron spectroscopy, microhardness tester and ring-on-block wear tester. It has shown that the diffusion front (the interface between the diffusion layer and the substrate) of the boride layer (BL) and the boro-sulfide layer (BSL) is saw tooth shape, while the diffusion front of the RE-boro-sulfide layer (RBSL) is flat. Compared with BSL layer, RBSL layer has a smaller and more uniform grain size, and a flatter hardness gradient from the surface to the diffusion front. The RBSL layer, consisting of an outer layer (from surface to 30 μm) mainly composed of Fe-B and an inner layer (from 30 μm to the diffusion front) mainly composed of Fe-S, has the best wear resistance and the most sufficient adhesion among those three.

Re-irradiation of the human spinal cord

International Nuclear Information System (INIS)

Sminia, P.; Oldenburger, F.; Hulshof, M.C.C.M.; Slotman, B.J.; Schneider, J.J.

2002-01-01

Purpose: Experimental animal data give evidence of long-term recovery of the spinal cord after irradiation. By extrapolation of these data, re-irradiation regimes were designed for eight patients who required palliative radiotherapy. As a consequence of reirradiation, their spinal cords were exposed to cumulative doses exceeding the tolerance dose. Radiobiological and clinical data are presented. Patients and method: Eight patients were re-irradiated on the cervical (n=1), thoracic (n=5) and lumbar (n=2) spinal cord. The time interval between the initial and re-treatment ranged from 4 months to 12.7 years (median: 2.5 years). (Re-)treatment schemes were designed and analyzed on basis of the biologically effective dose (BED) according to the linear-quadratic model. The repair capacity (α/β ratio) for the cervico-thoracic and lumbar spinal cord was assumed to be 2 Gy and 4 Gy, with a BED tolerance of 100 Gy and 84 Gy, respectively. Results: The cumulative irradiation dose applied to the spinal cord varied between 125 and 172% of the BED tolerance . During follow-up, ranging from 33 days to >4.5 years (median: 370 days) none of the patients developed neurological complications. Seven patients died from tumor progression, and one patient is still alive. Conclusion: Long-term recovery of the spinal cord from radiation injury, which has been demonstrated in rodents and primates, may also occur in humans. (orig.) [de

Together and apart: a typology of re-partnering in old age.

Science.gov (United States)

Koren, Chaya

2014-08-01

The human need for love, friendship, and physical contact, and the fear of loneliness do not diminish with age. Widowhood and late-life divorce and increased life expectancy are likely to lead to alternative relationships, such as re-partnering. The purpose of this paper is to explore interplays between emotional and physical components of re-partnering in old age. Theoretical sampling of 20 couples included men who re-partnered at the age of 65+ years and women at the age of 60+ years, following termination of lifelong marriages due to death or divorce. Living arrangements included married or unmarried cohabitation under the same roof or in separate homes. Forty semi-structured interviews were tape-recorded and transcribed verbatim. The couple was the unit of analysis. Interplays between physical and emotional dimensions were examined using five abductive parameters derived from data analysis resulting in a fourfold typology of emotional and physical closeness/distance in re-partnering in old age: (1) living together (physically and emotionally); (2) living apart (physically) together (emotionally); (3) living together (physically) apart (emotionally); and (4) living apart (physically and emotionally). Findings revealed types of partner relationships that are different from lifelong marriages. The typology could help professionals working with older persons regarding what to expect in re-partnering in old age and be included in developmental theories as an option in old age. A quantitative tool for research and therapy purposes, entitled The Re-partnering in Old Age Typology Scale (RPOAT Scale), based on abductive parameters, could be established for measuring re-partnering relationship quality and classifying re-partnering couples.

Disposal and re-use of TENORM - legal limitations and obstacles

International Nuclear Information System (INIS)

Weiss, D.; Ettenhuber, E.

2004-01-01

While implementing EURATOM guideline 96/29 in the German legislation, in June of 2001 an essential pre-condition was created for re-use or disposal of TENORM. An essential progress has been achieved allowing to re-use TENORM or to dump it together with other residues and waste, if the specific activity does not exceed the limits defined in the radiation protection ordinance (StrlSchV). Otherwise, if the specified limits in terms of concentration or radiation dose are exceeded, than these materials must remain under radiological protection. A practical application of the new German regulation turns out to be difficult especially for disposal together with other waste and for re-use as backfilling material in mines taking into account problems arising from adaptation of the respective legislation on radiation protection, soil protection, waste management and shipment of dangerous goods. The report tackles obstacles for re-use and disposal of TENORM together with garbage and toxic waste arising from the new legislation. Otherwise, proposals will be given how obstacles of selected options for re-use and disposal can be overcome. (orig.)

Prostate needle biopsies: interobserver variation and clinical consequences of histopathological re-evaluation

DEFF Research Database (Denmark)

Berg, Kasper Drimer; Toft, Birgitte Grønkaer; Røder, Martin Andreas

2011-01-01

Histopathological grading of prostate cancer (PCa) is associated with significant interobserver variability. This, as well as clinical consequences of histopathological re-evaluation, was investigated. In 350 patients, histopathological re-evaluations of prostate biopsies were compared with primary...... pathology reports and with histopathology of the radical prostatectomy specimen. The consequences of re-evaluation for clinical workup and treatment of patients according to local algorithms were determined. For Gleason score (GS), complete agreement between primary report and re-evaluation was found in 76.......9%. The cancers were assessed with higher GS at re-evaluation in 25.0% of patients in cases with primary GS = 6, while scores were devaluated in 3.0% and 10.3% of the patients with primary GS = 7 and = 8, respectively. Strategies for clinical evaluation and treatment were changed as a result of the biopsy re...

The Secret of Guided Missile Re-Entry,

Science.gov (United States)

1986-06-25

I RD-PAI169 598 THE SECRET OF GUIDED MISSILE RE-ENTRY(U) FOREIGN / I TECHNOLOGY DIV NRIGHT-PATTERSON RFB OH J CHEN ET AL. I 25 JUN 96 FTD-ID(RS)T...TECHNOLOGY DIVISION THE SECRET OF GUIDED MISSILE RE-ENTRY by Chen Jingzhong, An Sehua J L 0 7 ’:;85’ ’ 0 *Approved for public release; Distribution...unlimite t d. :. 86 7 034.. FTD- ID(RS)T-0459-86 HUMAN TRANSLATION FTD-ID(RS)T-0459-86 25 June 1986 MICROFICHE NR: F - - 0Q 9? THE SECRET OF GUIDED

Lad os lære af nutidens private ledere - ikke fortidens

DEFF Research Database (Denmark)

Torfing, Jacob

2017-01-01

Hvis vi endelig skal lære af den private sektor en gang til, så lad os dog lære af de bedste i klassen i stedet for at kigge i bakspejlet og genopfinde ledelsestænkning fra 60’erne og 70’erne, skriver professor Jacob Torfing.......Hvis vi endelig skal lære af den private sektor en gang til, så lad os dog lære af de bedste i klassen i stedet for at kigge i bakspejlet og genopfinde ledelsestænkning fra 60’erne og 70’erne, skriver professor Jacob Torfing....

Re-excision of margins before breast radiation-diagnostic or therapeutic?

International Nuclear Information System (INIS)

Chism, Derek B.; Freedman, Gary M.; Li, Tianyu; Anderson, Penny R.

2006-01-01

Purpose: To identify factors in breast cancer patients that predict the pathologic results of re-excision for close or positive margins and to determine the effect on local control. Methods and Materials: We divided 1,044 patients with Stage I-II breast cancer with a close (≤2 mm) or positive margin after initial excision into three groups. Group 1 included 199 patients without additional excision, Group 2 included 546 patients with re-excision found to be free of cancer, and Group 3 included 299 patients with re-excision and residual cancer. All patients were treated with radiotherapy with a median follow-up of 6.7 years. Results: The 10-year local control rate was 95% for Group 1 and 94% for Groups 2 and 3 (p = 0.788). Of the 846 patients, 65% had no residual disease on re-excision and 35% did have residual tumor. The factors significantly associated with positive re-excision findings were initial positive margins, positive nodes, Stage T2 tumor, and an extensive intraductal component. The 10-year local control rate was 95% for Group 2 vs. 91% for Group 3 (p = 0.038). Conclusion: The low recurrence rates seen in this study suggest that selected patients with non-negative margins, particularly those with a low risk of having residual disease at re-excision, may be treated with radiotherapy

Developing the 186 Re radiolabelling procedures of peptides and monoclonal antibodies

International Nuclear Information System (INIS)

Lungu, V.; Mihailescu, G.

1999-01-01

Mono and poli-clonal antibodies are the most recent candidate molecules for the radiopharmaceutical preparation used in radioimmunotherapy and radiodiagnostic. Our study presents results in 186 Re direct labelling of HIgG (Human Immunoglobulin G) poli-clonal antibody. The steps in labelling process are: 1. pre-reduction -S-S- bridges of HIgG molecule with ascorbic acid in pH = 3.5 - 4.5; 2. preparation of the reducing system for 186 ReO 4 - in presence of Sn 2+ ions excess and 3. coupling 186 Re (red) to -SH groups of biomolecules. The specific reactions of each step above are controlled by: incubation time and temperature, pH, molar ratio 186 Re: HIgG. 186 Re-HIgG samples were purified by gel elution chromatography method and the quality control was performed by chromatography techniques. To labelled of HIgG we effected the pre-reduction of -S-S- bridges of biomolecules to sulfhydryls using the following reducing agents: ascorbic acid, cysteine, active hydrogen, 2,3 dimercaptopropanol. The pre-reduction reactions are controlled by mass ratios of reduction agent/biomolecule, pH, temperature and time of incubation. HIgG was the biomolecule used in the pre-reduction reactions. The specific parameters for each systems are presented. The stannous chloride was used as reducing agent in two systems, SnCl 2 : 0.05 N HCl and SnCl 2 : 20 mg/ml citric acid. The coupling reaction of 186 Re (red) with the biomolecule has been controlled by time and incubation temperature and the influence of pH regarding the binding of 186 Re to the biomolecule. 186 Re-HIgG was obtained by: i) incubation at the room temperature, 1 hour time of HIgG in thiol form and 186 Re in reducing form and ii) incubation of HIgG in thiol form, at 37 deg C and 22 hours time, with adding after pre-reduction of SnCl 2 and Na 186 ReO 4 . Quality control was effected by chromatography techniques (paper and gel chromatography) on labelled biomolecule before and after purification. The elution gel chromatography

Re-Assessment of Concrete Bridges

DEFF Research Database (Denmark)

Thoft-Christensen, Palle

In this paper two aspects of re-assessment of the reliability of concrete bridges are discussed namely modelling of the corrosion of reinforcement and updating of uncertain variables. The main reason for deterioration of concrete bridges is corrosion of the reinforcement. Therefore, modelling...

Re-Architecture: Reality or Utopia?

NARCIS (Netherlands)

Pereira-Roders, A.R.; Post, J.M.; Erkelens, P.A.

2008-01-01

RE-ARCHITECTURE: lifespan rehabilitation of built heritage (2004-2007) is a doctoral research funded by the Foundation for Science and Technology, Portugal; and hosted by the Unit Architectural Design and Engineering, Eindhoven University of Technology, The Netherlands. This doctoral research is now

Preparation and quality control of 186Re compounds

International Nuclear Information System (INIS)

Noto, M.G.; Amor, R.A.; Caviglia, D.A.; Ratner, M.T.; Schroder, A.M.; Rocco, J.C.; Mancini, A.C.

1987-01-01

The optimal conditions were investigated in order to label the methylendiphosphonate (MDP), hydroxyethylendiphosphonate (HEDP), pyrophosphonate (PYP) and ethylendiaminotetramethylenphosphoric (EDTMP) with 186 Re. The biodistribution of these compounds in experimental animals were studied to determine the most suitable therapeutic agent for its eventual use as pain palliative in patients with bone metastases. The biodistribution assays were performed in Wistar rats, and the 186 Re HEDP was finally chosen. (M.E.L.) [es

Re-humanising Public Urban Space

DEFF Research Database (Denmark)

Almahmood, Mohammed Abdulrahman M

, this thesis suggests that re-humanising public urban space should not only be considered as a matter of design, but also as an on-going process which includes an inclusive spatial planning agenda and the management of space supplemented by background knowledge regarding the culture of use of space.......This PhD thesis aims to contribute to a better understanding of the spatial, social, and cultural dimensions of the formation of human-centred public urban space. ‘Re-humanising’ the city is a traveling concept which implies that public urban spaces are liveable, walkable, safe, enjoyable......, and inclusive thereby allowing vibrant social interaction. While the inclusiveness of space is considered as a core value in human-centred public urban space, social and spatial exclusion is a key challenge to the success of public urban space, especially in the Global South. The mainstream research in urban...

7 CFR 1710.104 - Service to non-RE Act beneficiaries.

Science.gov (United States)

2010-01-01

... GUARANTEES Loan Purposes and Basic Policies § 1710.104 Service to non-RE Act beneficiaries. (a) To the... made to finance electric facilities to serve consumers that are not RE Act beneficiaries. (b) Loan...

Toxoplasma gondii: A study of oocyst re-shedding in domestic cats.

Science.gov (United States)

Zulpo, Dauton Luiz; Sammi, Ana Sue; Dos Santos, Joeleni Rosa; Sasse, João Pedro; Martins, Thais Agostinho; Minutti, Ana Flávia; Cardim, Sérgio Tosi; de Barros, Luiz Daniel; Navarro, Italmar Teodorico; Garcia, João Luis

2018-01-15

The aim of the present study was to evaluate the re-shedding of T. gondii oocysts in cats fed tissue cysts of homologous and heterologous strains 12, 24 and 36 months after the first infection. Thirteen cats were used in the present study and were divided into four groups: G1 (n=2), G2 (n=3), G3 (n=5), and G4 (n=3). G1, G3 and G4 cats were infected with brain cysts of ME49 and G2 with TgDoveBr8, both genotype II strains of T. gondii. The G1 and G2 cats were re-infected after twelve months with brain cysts of VEG strain (genotype III), and G3 cats were re-infected with TgDoveBr1 (genotype II). The G3 cats were re-infected a third time after 24 months from the second infection, and the G4 cats were re-infected 36 months after the initial infection with cysts of the VEG strain. The cats' feces were evaluated using fecal flotation and genotyped with PCR-RFLP. The serological responses for IgM, IgA and IgG were determined by ELISA. All cats shed oocysts after the initial infection. Only one G1 cat shed oocysts when re-infected after twelve months with the VEG strain. No G2 cats excreted oocysts after the second infection with VEG. G3 cats, when re-infected after twelve months with the TgDoveBr1 strain, did not shed oocysts. However, when challenged after a third time with the VEG strain, three out of four cats shed oocysts. In the G4 group, when re-infected after thirty-six months with the VEG strain, two out of three cats shed oocysts. All oocyst samples were genotyped and characterized as the same genotype from the inoculum. Protection against oocyst re-excretion occurred in 90%, 25%, and 33.4% of cats after 12, 24, and 36 months from the initial infection, respectively. Therefore, the environmental contamination by oocysts from re-infected adult cats is only 30% lower than from kittens. In conclusion, the excretion of T. gondii oocysts was higher in experimentally re-infected cats throughout the years, especially when a heterologous strain was used. Copyright © 2017

A Study on Re-entry Predictions of Uncontrolled Space Objects for Space Situational Awareness

Science.gov (United States)

Choi, Eun-Jung; Cho, Sungki; Lee, Deok-Jin; Kim, Siwoo; Jo, Jung Hyun

2017-12-01

The key risk analysis technologies for the re-entry of space objects into Earth’s atmosphere are divided into four categories: cataloguing and databases of the re-entry of space objects, lifetime and re-entry trajectory predictions, break-up models after re-entry and multiple debris distribution predictions, and ground impact probability models. In this study, we focused on re- entry prediction, including orbital lifetime assessments, for space situational awareness systems. Re-entry predictions are very difficult and are affected by various sources of uncertainty. In particular, during uncontrolled re-entry, large spacecraft may break into several pieces of debris, and the surviving fragments can be a significant hazard for persons and properties on the ground. In recent years, specific methods and procedures have been developed to provide clear information for predicting and analyzing the re-entry of space objects and for ground-risk assessments. Representative tools include object reentry survival analysis tool (ORSAT) and debris assessment software (DAS) developed by National Aeronautics and Space Administration (NASA), spacecraft atmospheric re-entry and aerothermal break-up (SCARAB) and debris risk assessment and mitigation analysis (DRAMA) developed by European Space Agency (ESA), and semi-analytic tool for end of life analysis (STELA) developed by Centre National d’Etudes Spatiales (CNES). In this study, various surveys of existing re-entry space objects are reviewed, and an efficient re-entry prediction technique is suggested based on STELA, the life-cycle analysis tool for satellites, and DRAMA, a re-entry analysis tool. To verify the proposed method, the re-entry of the Tiangong-1 Space Lab, which is expected to re-enter Earth’s atmosphere shortly, was simulated. Eventually, these results will provide a basis for space situational awareness risk analyses of the re-entry of space objects.

Re-Condensation and Liquefaction of Helium and Hydrogen Using Coolers

International Nuclear Information System (INIS)

Green, Michael A.

2009-01-01

Coolers are used to cool cryogen free devices at temperatures from 5 to 30 K. Cryogen free cooling involves a temperature drop within the device being cooled and between the device and the cooler cold heads. Liquid cooling with a liquid cryogen distributed over the surface of a device combined with re-condensation can result in a much lower temperature drop between the cooler and the device being cooled. The next logical step beyond simple re-condensation is using a cooler to liquefy the liquid cryogen in the device. A number of tests of helium liquefaction and re-condensation of helium have been run using a pulse tube cooler in the drop-in mode. This report discusses the parameter space over which re-condensation and liquefaction for helium and hydrogen can occur.

Outcome after re-irradiation of head and neck cancer patients

Energy Technology Data Exchange (ETDEWEB)

Platteaux, Nele; Dirix, Piet; Vanstraelen, Bianca; Nuyts, Sandra [University Hospitals Leuven, Campus Gasthuisberg (Belgium). Dept. of Radiation Oncology

2011-01-15

Purpose: To retrospectively report the outcome of head and neck cancer patients following re-irradiation. Patients and Methods: A total of 51 patients with recurrent or second primary head and neck cancer received re-irradiation at Leuven University Hospital. Survival and locoregional control were calculated. Doses to organs at risk were retrieved from dose-volume histograms. Radiation-related toxicities were reported. Results: The 2-year actuarial overall survival rate was 30%. On univariate analysis, surgery before re-irradiation and high radiation dose were associated with superior survival. Grade 3 acute and grade 3 or more late toxicity occurred in respectively 29.4% and 35.3% of the patients. Conclusion: Re-irradiation in head and neck cancer patients is feasible with acceptable late toxicity, although the survival remains poor. (orig.)

Les orfèvres de la lumière

CERN Document Server

Gacoin, Marie-Pauline

2010-01-01

Le synchrotron SOLEIL est un accélérateur de particules d environ 200 mètres de diamètre, utilisé... comme une lampe. Un faisceau d électrons, fin comme un cheveu mais très énergétique, y circule quasiment à la vitesse de la lumière, émettant ce que l on appelle un rayonnement synchrotron (car le maintien des électrons sur la même trajectoire est obtenu au prix d une incroyable synchronisation des courants et des champs magnétiques), de même nature que la lumière du soleil : le spectre entier de la lumière blanche, de l infrarouge lointain aux rayons X très durs, est ainsi accessible et permet d analyser la matière et les matériaux, de les caractériser. Pour ne donner qu un exemple parmi des milliers, c est sur une des lignes de lumière de SOLEIL qu a tout récemment été révélée la composition des vernis utilisés par Antonio Stradivari pour protéger ses fameux violons... Comme toute idée qui paraît tellement simple au final, l idée de SOLEIL a nécessité des dizaines d année...

Ternary rhombohedral Laves phases RE_2Rh_3Ga (RE = Y, La-Nd, Sm, Gd-Er)

International Nuclear Information System (INIS)

Seidel, Stefan; Benndorf, Christopher; Heletta, Lukas; Poettgen, Rainer; Eckert, Hellmut; Sao Paulo Univ., Sao Carlos

2017-01-01

The ordered Laves phases RE_2Rh_3Ga (RE=Y, La-Nd, Sm, Gd-Er) were synthesized by arc-melting of the elements and subsequent annealing. The samples were characterized by powder X-ray diffraction (XRD). They crystallize with the rhombohedral Mg_2Ni_3Si type structure, space group R3m. Three structures were refined from single crystal X-ray diffractometer data: a=557.1(1), c=1183.1(2), wR2=0.0591, 159 F"2 values, 10 variables for Y_2Rh_3Ga, a=562.5(2), c=1194.4(2) pm, wR2=0.0519, 206 F"2 values, 11 variables for Ce_2Rh_3Ga and a=556.7(2), c=1184.1(3) pm, wR2=0.0396, 176 F"2 values, 11 variables for Tb_2Rh_3Ga. The Rh_3Ga tetrahedra are condensed via common corners and the large cavities left by the network are filled by the rare earth atoms. The RE_2Rh_3Ga Laves phases crystallize with a translationengleiche subgroup of the cubic RERh_2 Laves phases with MgCu_2 type. Magnetic susceptibility measurements reveal Pauli paramagnetism for Y_2Rh_3Ga and La_2Rh_3Ga. Ce_2Rh_3Ga shows intermediate cerium valence while all other RE_2Rh_3Ga phases are Curie-Weiss paramagnets which order magnetically at low temperatures. The "8"9Y and "7"1Ga solid state nuclear magnetic resonance (NMR) spectra of the diamagnetic representative Y_2Rh_3Ga show well-defined single resonances in agreement with an ordered bulk phase. In comparison to the binary Laves phase YRh_2 a strongly increased "8"9Y resonance frequency is observed owing to a higher s-electron spin density at the "8"9Y nuclei as proven by density of states (DOS) calculations.

Problems experienced by women re-entering into the education profession / Melanie Beyers

OpenAIRE

Beyers, Melanie

2001-01-01

This study investigated problems experienced by women re-entering into the education profession by focusing on: • The nature and scope of re-entry by women into the education profession; • the features and problems experienced by women on re-entering the education profession; • the problems women educators experience on re-entering the education profession in the North West Province. To achieve these goals, both an empirical survey and a survey of literature was conducted. The study...

Workforce re-entry for Japanese unemployed dental hygienists.

Science.gov (United States)

Usui, Y; Miura, H

2015-02-01

The aim of this study was to define the profile of unemployed dental hygienists who could be enticed to re-enter the workforce and the factors that could facilitate their re-entry into the dental field in Japan. The questionnaire was mailed with a postage-paid return envelope to a sample of 3095 licensed dental hygienists. A 50.4% response rate (S = 1477) was observed. The rate of working dental hygienists was 60.3% (n = 891), and of unemployed dental hygienists was 39.7% (n = 586). Of the latter, 31.9% (n = 187) stated intentions of returning to the workplace. The unemployed dental hygienists seeking employment were more often married and had more children, compared with working dental hygienists currently. This group also had significantly fewer total service years. Moreover, only 11.96% of them belonged to the Japan Dental Hygienists' Association, and 41.3% of those attended training workshops. According to their response, they perceived their top three major barriers to re-entry as 'lack sufficient dental hygiene skill', 'child rearing' and 'poor working atmosphere'. 'Flexibility in the work schedule' and 'location' were the most important factors for re-entry from their perspective. There were not many dental hygienists hoping to return to the dental field. The findings suggested that strategies to encourage non-practicing dental hygienists to re-entry should be emphasized in the areas of a flexible working atmosphere, easy access to information on how to return to practice and guidance on how to maintain professionalism during inactivity. © 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

Viking re-enactment

DEFF Research Database (Denmark)

Konzack, Lars

2017-01-01

In Chapter 4 we meet many different participants such as archaeology students, tradespeople, re-enactors, horseback riders, archers and many more who are all partaking in the same Viking market at Moesgaard Museum, Denmark. The purpose of this chapter is to present Moesgaard Viking Moot...... as a participatory local heritage event with a diverse range of spectators and participants. Lars Konzack shows how the different participants have developed their interaction with and interpretation of the Viking age through the market’s 40-year history....

Gettysburg re-imagined

DEFF Research Database (Denmark)

Chronis, Athinodoros; Arnould, Eric J.; Hampton, Ronald D.

2012-01-01

and expands narrative-based theories of consumption experiences. We argue that the workings of imagination in tourism sites are inextricably linked to the production of cultural imaginaries, that is, socially important narratives invested with collective values; we illustrate the process through which...... narrative of the American Civil War and we explore ethnographically the ways in which this historical episode is (re)imagined and articulated in tourism at Gettysburg. Our research provides an alternative account to mental imagery theory that is based on restrictive cognitive conceptions of imagination...

Microstructural analyses and critical current densities in the high-Tc superconductor system ReBa2Cu3OX, with RE = Y, Sm, Eu, Gd, Dy, Ho

International Nuclear Information System (INIS)

Schindler, G.; Seebacher, B.

1989-01-01

The authors report on investigations into the impact of the rare earths (RE) as given in the title on the ceramic microstructure and the critical current density j c in the superconductor system REBa 2 Cu 3 O x . With RE = Sm, Eu, or Gd, the material is homogeneous in phase and crystallizes in platelets with maximum sizes of up to 350 μm. Material with RE = Y, Dy, or Ho exhibits grain sizes up to 500 μm, and a low amount of phase inhomogeneities. The critical currents measured are between 25 Acm -2 and 290 Acm -2 at 77 K, without external field. The highest values are found in systems with RE = Eu or Gd. (orig.) [de

Immediate re-transplantation following early kidney transplant thrombosis.

LENUS (Irish Health Repository)

Phelan, Paul J

2012-02-01

Allograft thrombosis is a devastating early complication of renal transplantation that ultimately leads to allograft loss. We report here on our experience of nine cases of immediate re-transplantation following early kidney transplant thrombosis at a single centre between January 1990 and June 2009. The mean age was 42.9 years at time of transplant. For seven patients, the allograft thrombosis was their first kidney transplant and seven of the nine cases had a deceased donor transplant. The initial transplants functioned for a mean of 1.67 days and the patients received a second allograft at a mean of 3.1 days after graft failure. All of the re-transplants worked immediately. Four allografts failed after a mean of 52.5 months (2-155 months). Two of these died with a functioning allograft, one failed owing to chronic allograft nephropathy and one owing to persistent acute cellular rejection. The remaining five patients still have a functioning allograft after a mean of 101.8 months (7-187 months). One year allograft and patient survival after re-transplantation were 87.5% and 100% respectively (after 5 years, both were 57%). Immediate re-transplantation following early kidney transplant thrombosis can be a success. It may be considered in selected cases after allograft thrombosis.

Attribute-based proxy re-encryption with keyword search.

Science.gov (United States)

Shi, Yanfeng; Liu, Jiqiang; Han, Zhen; Zheng, Qingji; Zhang, Rui; Qiu, Shuo

2014-01-01

Keyword search on encrypted data allows one to issue the search token and conduct search operations on encrypted data while still preserving keyword privacy. In the present paper, we consider the keyword search problem further and introduce a novel notion called attribute-based proxy re-encryption with keyword search (ABRKS), which introduces a promising feature: In addition to supporting keyword search on encrypted data, it enables data owners to delegate the keyword search capability to some other data users complying with the specific access control policy. To be specific, ABRKS allows (i) the data owner to outsource his encrypted data to the cloud and then ask the cloud to conduct keyword search on outsourced encrypted data with the given search token, and (ii) the data owner to delegate other data users keyword search capability in the fine-grained access control manner through allowing the cloud to re-encrypted stored encrypted data with a re-encrypted data (embedding with some form of access control policy). We formalize the syntax and security definitions for ABRKS, and propose two concrete constructions for ABRKS: key-policy ABRKS and ciphertext-policy ABRKS. In the nutshell, our constructions can be treated as the integration of technologies in the fields of attribute-based cryptography and proxy re-encryption cryptography.

Attribute-Based Proxy Re-Encryption with Keyword Search

Science.gov (United States)

Shi, Yanfeng; Liu, Jiqiang; Han, Zhen; Zheng, Qingji; Zhang, Rui; Qiu, Shuo

2014-01-01

Keyword search on encrypted data allows one to issue the search token and conduct search operations on encrypted data while still preserving keyword privacy. In the present paper, we consider the keyword search problem further and introduce a novel notion called attribute-based proxy re-encryption with keyword search (), which introduces a promising feature: In addition to supporting keyword search on encrypted data, it enables data owners to delegate the keyword search capability to some other data users complying with the specific access control policy. To be specific, allows (i) the data owner to outsource his encrypted data to the cloud and then ask the cloud to conduct keyword search on outsourced encrypted data with the given search token, and (ii) the data owner to delegate other data users keyword search capability in the fine-grained access control manner through allowing the cloud to re-encrypted stored encrypted data with a re-encrypted data (embedding with some form of access control policy). We formalize the syntax and security definitions for , and propose two concrete constructions for : key-policy and ciphertext-policy . In the nutshell, our constructions can be treated as the integration of technologies in the fields of attribute-based cryptography and proxy re-encryption cryptography. PMID:25549257

Study of radiation synovectomy using 188Re-sulfide

International Nuclear Information System (INIS)

Chen Gang; Li Peiyong; Jiang Xufeng; Zhang Liying; Wang Xuefeng; Sun Zhenming; Zhang Huan

2002-01-01

Objective: To study the radiation synovectomy with 188 Re-sulfide. Methods: Thirty cases were divided into 2 groups, the group with hemophilia and the group with rheumatoid arthritis (RA). Patients with joint synovitis were injected different doses of 188 Re-sulfide, 222 - 444 MBq intra-articular. MRI was taken before and 3 - 6 months after the radiation synovectomy to evaluate the treatment efficacy, and the symptoms were also evaluated. Results: MRI study showed that after the treatment the synovium became thiner and the edema was reduced in the lesioned joint. The symptoms were improved with the pain relieved and duration of intra-articular hemorrhage reduced. Conclusions: Radiation synovectomy using 188 Re-sulfide has effects on synovitis. It can be used clinically to improve the symptoms of joint synovitis and reduce the duration of intra-articular hemorrhage

A emergência do autor Pierre Rivière/The emergence of the Pierre Rivière author

Directory of Open Access Journals (Sweden)

Adriana Duarte Bonini Mariguela

2007-01-01

Full Text Available Nesse artigo apresento uma análise do caso de parricídio / fraticídio cometido por um jovem camponês francês, nascido na comuna de Courvaudon, Pierre Rivière que em 3 de junho de 1835, aos vinte anos, assassinou a golpes de foice sua mãe grávida de sete meses, sua irmã de 18 anos, e seu irmão de sete anos. O livro intitulado Eu, Pierre Rivière, que degolei minha mãe, minha irmã e meu irmão produzido pelo trabalho de uma equipe de pesquisadores, no Collège de France, sob a coordenação de Michel Foucault em 1973, apresenta em seu conjunto notícias de jornais, testemunhos, interrogatórios, laudos médicos e uma gama de diferentes discursos. Para empreender a análise do nó entre a escrita e o assassinato, utilizo a relação entre a escrita e o autor demarcando o personagem Rivière no desdobramento, na ordem do corpo e da linguagem. This paper has as aim to present an analysis of the case of patricide / fratricide cometed by a French Countryman, Pierre Rivière, who was born in the commune of Courvaudon, who, on July 3rd, 1835, at age of 20, killed his mother, his brother and sister with a sickle. His mother was in the seventh month of pregnancy, his sister was 18 and his brother was 7 years old. The book, whose name was “I, Pierre Riviere, Having Slaughtered My Mother, My Sister, and My Brother ...: A Case of Parricide in the Nineteenth Century” was produced by a group of researchers at the Collège de France, under the coordination of Michel Foucault in 1973, has a set of newspaper news, witnesses, inquiring, forensic medical reports and a variety of different texts. To understand and analyze the writings and the homicide, the relationship between writing and the author is used, marking the character Rivière unfolding body and language.

Dosimetric benefit of adaptive re-planning in pancreatic cancer stereotactic body radiotherapy

Energy Technology Data Exchange (ETDEWEB)

Li, Yongbao [Department of Engineering Physics, Tsinghua University, Key Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education, Beijing (China); Center for Advanced Radiotherapy Technologies University of California San Diego, La Jolla, CA (United States); Department of Radiation Oncology, University of California San Diego, La Jolla, CA (United States); Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX (United States); Hoisak, Jeremy D.P.; Li, Nan; Jiang, Carrie [Center for Advanced Radiotherapy Technologies University of California San Diego, La Jolla, CA (United States); Department of Radiation Oncology, University of California San Diego, La Jolla, CA (United States); Tian, Zhen [Center for Advanced Radiotherapy Technologies University of California San Diego, La Jolla, CA (United States); Department of Radiation Oncology, University of California San Diego, La Jolla, CA (United States); Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX (United States); Gautier, Quentin; Zarepisheh, Masoud [Center for Advanced Radiotherapy Technologies University of California San Diego, La Jolla, CA (United States); Department of Radiation Oncology, University of California San Diego, La Jolla, CA (United States); Wu, Zhaoxia; Liu, Yaqiang [Department of Engineering Physics, Tsinghua University, Key Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education, Beijing (China); Jia, Xun [Center for Advanced Radiotherapy Technologies University of California San Diego, La Jolla, CA (United States); Department of Radiation Oncology, University of California San Diego, La Jolla, CA (United States); Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX (United States); and others

2015-01-01

Stereotactic body radiotherapy (SBRT) shows promise in unresectable pancreatic cancer, though this treatment modality has high rates of normal tissue toxicity. This study explores the dosimetric utility of daily adaptive re-planning with pancreas SBRT. We used a previously developed supercomputing online re-planning environment (SCORE) to re-plan 10 patients with pancreas SBRT. Tumor and normal tissue contours were deformed from treatment planning computed tomographies (CTs) and transferred to daily cone-beam CT (CBCT) scans before re-optimizing each daily treatment plan. We compared the intended radiation dose, the actual radiation dose, and the optimized radiation dose for the pancreas tumor planning target volume (PTV) and the duodenum. Treatment re-optimization improved coverage of the PTV and reduced dose to the duodenum. Within the PTV, the actual hot spot (volume receiving 110% of the prescription dose) decreased from 4.5% to 0.5% after daily adaptive re-planning. Within the duodenum, the volume receiving the prescription dose decreased from 0.9% to 0.3% after re-planning. It is noteworthy that variation in the amount of air within a patient's stomach substantially changed dose to the PTV. Adaptive re-planning with pancreas SBRT has the ability to improve dose to the tumor and decrease dose to the nearby duodenum, thereby reducing the risk of toxicity.

Re-purification of labelled ferritin antigen with HPLC

International Nuclear Information System (INIS)

Zhang Haoyi; Jin Lichun

2002-01-01

Objective: To improve the quality of long-term stored labelled ferritin antigen with HPLC. Methods: The antigen was analyzed and purified with HPLC and again analyzed with RIA afterwards. Results: Ferritin antigen underwent significant polymerization after long-term (aggregation) storage. After re-purification with HPLC, its immuno-activity and labelled specific radioactivity were both significantly improved. Conclusion: Quality of stored ferritin RIA kit could be greatly improved after re-purification with HPLC

Energetics of stepwise disordering transformation in pyrochlores, RE2Ti2O7 (RE = Y, Gd and Dy)

International Nuclear Information System (INIS)

Hayun, Shmuel; Tran, Tien B.; Lian, Jie; Fuentes, Antonio F.; Navrotsky, Alexandra

2012-01-01

Graphical abstract: The transformation from disordered to more order state in the pyrochlore system go through multiple energetics steps; the cation sublattice rearrangement is control by the diffusion of the cations while the anion sublattice display an irreversible transformation from a disordered to a higher-ordered state via diffusionless transformation. - Abstract: The capacity to incorporate actinide cations makes pyrochlore titanates first-choice phases in titanate-based waste form ceramics. Despite broad interest in the pyrochlore order–disorder transformation due to the cumulative effects of 238 U, 235 U and 232 Th radioactive decay and their daughter products, only limited thermodynamic data, mainly based on simulations of ion-beam irradiation experiments, have been reported. In this work, for the first time, heavily disordered pyrochlores, RE 2 Ti 2 O 7 (RE = Y, Gd and Dy), from mechanical milling of their constituent oxides, were thermochemically investigated. Two types of thermal events were identified using high-temperature differential scanning calorimetry and correlated to the structural disorder in the cation and anion sublattices. Moreover, the excess formation energy measured by oxide melt solution calorimetry shows that the smaller the ionic radius of the RE, the easier it is to remove damage domains.

Intricate Resonant Raman Response in Anisotropic ReS2.

Science.gov (United States)

McCreary, Amber; Simpson, Jeffrey R; Wang, Yuanxi; Rhodes, Daniel; Fujisawa, Kazunori; Balicas, Luis; Dubey, Madan; Crespi, Vincent H; Terrones, Mauricio; Hight Walker, Angela R

2017-10-11

The strong in-plane anisotropy of rhenium disulfide (ReS 2 ) offers an additional physical parameter that can be tuned for advanced applications such as logic circuits, thin-film polarizers, and polarization-sensitive photodetectors. ReS 2 also presents advantages for optoelectronics, as it is both a direct-gap semiconductor for few-layer thicknesses (unlike MoS 2 or WS 2 ) and stable in air (unlike black phosphorus). Raman spectroscopy is one of the most powerful characterization techniques to nondestructively and sensitively probe the fundamental photophysics of a 2D material. Here, we perform a thorough study of the resonant Raman response of the 18 first-order phonons in ReS 2 at various layer thicknesses and crystal orientations. Remarkably, we discover that, as opposed to a general increase in intensity of all of the Raman modes at excitonic transitions, each of the 18 modes behave differently relative to each other as a function of laser excitation, layer thickness, and orientation in a manner that highlights the importance of electron-phonon coupling in ReS 2 . In addition, we correct an unrecognized error in the calculation of the optical interference enhancement of the Raman signal of transition metal dichalcogenides on SiO 2 /Si substrates that has propagated through various reports. For ReS 2 , this correction is critical to properly assessing the resonant Raman behavior. We also implemented a perturbation approach to calculate frequency-dependent Raman intensities based on first-principles and demonstrate that, despite the neglect of excitonic effects, useful trends in the Raman intensities of monolayer and bulk ReS 2 at different laser energies can be accurately captured. Finally, the phonon dispersion calculated from first-principles is used to address the possible origins of unexplained peaks observed in the Raman spectra, such as infrared-active modes, defects, and second-order processes.

Predictors of homeless services re-entry within a sample of adults receiving Homelessness Prevention and Rapid Re-Housing Program (HPRP) assistance.

Science.gov (United States)

Brown, Molly; Vaclavik, Danielle; Watson, Dennis P; Wilka, Eric

2017-05-01

Local and national evaluations of the federal Homelessness Prevention and Rapid Re-Housing Program (HPRP) have demonstrated a high rate of placement of program participants in permanent housing. However, there is a paucity of research on the long-term outcomes of HPRP, and research on rehousing and prevention interventions for single adults experiencing homelessness is particularly limited. Using Homeless Management Information System data from 2009 to 2015, this study examined risk of return to homeless services among 370 permanently housed and 71 nonpermanently housed single adult HPRP participants in Indianapolis, Indiana. Kaplan-Meier survival curves were conducted to analyze time-to-service re-entry for the full sample, and the homelessness prevention and rapid rehousing participants separately. With an average follow-up of 4.5 years after HPRP exit, 9.5% of the permanently housed HPRP participants and 16.9% of those nonpermanently housed returned to homeless services. By assistance type, 5.4% of permanently housed and 15.8% of nonpermanently housed homelessness prevention recipients re-entered services, and 12.8% of permanently housed and 18.2% of nonpermanently housed rapid rehousing recipients re-entered during the follow-up period. Overall, veterans, individuals receiving rapid rehousing services, and those whose income did not increase during HPRP had significantly greater risk of returning to homeless services. Veterans were at significantly greater risk of re-entry when prevention and rehousing were examined separately. Findings suggest a need for future controlled studies of prevention and rehousing interventions for single adults, aiming to identify unique service needs among veterans and those currently experiencing homelessness in need of rehousing to inform program refinement. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

High rate of virological re-suppression among patients failing ...

African Journals Online (AJOL)

Results. Of 69 patients enrolled in the programme, 40 had at least one follow-up VL and no known drug resistance at enrolment; 27 (68%) of these re-suppressed while remaining on second-line ART following enhanced adherence support. The majority (18/27; 67%) achieved re-suppression within the first 3 months in the ...

Carcass glycogen repletion on carbohydrate re-feeding after starvation.

OpenAIRE

Cox, D J; Palmer, T N

1987-01-01

In mice, the response of carcass glycogen to glucose re-feeding after starvation is biphasic. The initial repletive phase is followed by partial (greater than 50%) glycogen mobilization. This turnover of carcass glycogen in response to carbohydrate re-feeding may play an important role in the provision of C3 precursors for hepatic glycogen synthesis.

Application of the FADS system on the Re-entry Module

Science.gov (United States)

Zhen, Huang

2016-07-01

The aerodynamic model for Flush Air Data Sensing System (FADS) is built based on the surface pressure distribution obtained through the pressure orifices laid on specific positions of the surface,and the flight parameters,such as angle of attack,angle of side-slip,Mach number,free-stream static pressure and dynamic pressure are inferred from the aerodynamic model.The flush air data sensing system (FADS) has been used on several flight tests of aircraft and re-entry vehicle,such as,X-15,space shuttle,F-14,X-33,X-43A and so on. This paper discusses the application of the FADS on the re-entry module with blunt body to obtain high-precision aerodynamic parameters.First of all,a basic theory and operating principle of the FADS is shown.Then,the applications of the FADS on typical aircrafts and re-entry vehicles are described.Thirdly,the application mode on the re-entry module with blunt body is discussed in detail,including aerodynamic simulation,pressure distribution,trajectory reconstruction and the hardware shoule be used,such as flush air data sensing system(FADS),inertial navigation system (INS),data acquisition system,data storage system.Finally,ablunt module re-entry flight test from low earth orbit (LEO) is planned to obtain aerodynamic parameters and amend the aerodynamic model with this FADS system data.The results show that FADS system can be applied widely in re-entry module with blunt bodies.

Re-tuning tuned mass dampers using ambient vibration measurements

International Nuclear Information System (INIS)

Hazra, B; Sadhu, A; Narasimhan, S; Lourenco, R

2010-01-01

Deterioration, accidental changes in the operating conditions, or incorrect estimates of the structure modal properties lead to de-tuning in tuned mass dampers (TMDs). To restore optimal performance, it is necessary to estimate the modal properties of the system, and re-tune the TMD to its optimal state. The presence of closely spaced modes and a relatively large amount of damping in the dominant modes renders the process of identification difficult. Furthermore, the process of estimating the modal properties of the bare structure using ambient vibration measurements of the structure with the TMD is challenging. In order to overcome these challenges, a novel identification and re-tuning algorithm is proposed. The process of identification consists of empirical mode decomposition to separate the closely spaced modes, followed by the blind identification of the remaining modes. Algorithms for estimating the fundamental frequency and the mode shape of the primary structure necessary for re-tuning the TMD are proposed. Experimental results from the application of the proposed algorithms to identify and re-tune a laboratory structure TMD system are presented

In-house Preparation of 188W/188Re Generators

International Nuclear Information System (INIS)

Sriwiang, Wiranee; Minsakorn, Napharat; Wardwilai, Charudej; Yindirum, Chareon; Sangsuriyan, Jatupol

2007-08-01

Full text: Low activity 188W/188Re generators were developed for the purpose of routinely supplying rhenium-188 for laboratory experiments and research works. Chromatography technology was applied in the construction of the generators. The chromatography columns containing 1.74 g alumina (Al2O3) were housed in plastic (PE) shielding inside the 30mm thick lead shield. Three generators were loaded with three different 188W activities; 25mCi (RG1), 25 mCi (RG2) and 50 mCi (RG3). Generator performances were determined in terms of elution yields, radiochemical purity, Al-breakthrough, 188W-breakthrough, and radionuclidic purity of the eluted products. These generators can be used for more than 6 months with average elution yields greater than 90 %. Radiochemical purity of 188ReO4- was high (> 99.7 % by ITLC), low level of 188W -breakthrough and low contamination of 192Ir and 191Os. There were only less than 1 ppm of 186W carrier and less than 3 ppm of Al-breakthrough. Key words: 188W/188Re, Generator, 188Re, Radionuclide

A tale of two re-branded cities:Riga, Latvia and Aarhus, Denmark

DEFF Research Database (Denmark)

Locmele, Gunta; Mousten, Birthe

2016-01-01

This study shows how Riga and Arhus identified, formulated and communicated city re-branding. Our analysis concentrates on resident responses to city re-branding and how such responses could force the municipalities to withdraw their re-branding. A city loses its identity if it is globalized...

Alternation of apoptotic and implanting genes expression of mouse embryos after re-vitrification

Science.gov (United States)

Majidi Gharenaz, Nasrin; Movahedin, Mansoureh; Mazaheri, Zohreh; Pour beiranvand, Shahram

2016-01-01

Background: Nowadays, oocytes and embryos vitrification has become a routine technique. Based on clinical judgment, re-vitrification maybe required. But little is known about re-vitrification impact on genes expression. Objective: The impact of re-vitrification on apoptotic and implanting genes, Bax, Bcl-2 and ErbB4, at compaction stage embryos were evaluated in this study. Materials and Methods: In this experimental study, 8 cell embryos (n=240) were collected from female mature mice, 60-62 hr post HCG injection. The embryos were divided randomly to 3 groups included: fresh (n=80), vitrified at 8 cell stage (n=80), vitrified at 8 cell stage thawed and re-vitrified at compaction stage (n=80). Embryos were vitrified by using cryolock, (open system) described by Kuwayama. Q-PCR was used to examine the expression of Bax, Bcl2 ErbB4 genes in derived blastocysts. Results: Our result showed that expanded blastocyst rate was similar between vitrified and re-vitrified groups, while re-vitrified embryos showed significant decrease in expanded blastocyst rate comparing with fresh embryos (p=0.03). In addition, significant difference was observed on apoptotic gene expression when comparing re-vitrified and fresh embryos (p=0.004), however expression of Bax and Bcl-2 (apoptotic) genes didn't demonstrate a significant difference between re-vitrified and vitrified groups. The expression rate of ErbB4, an implantation gene was decreased in re-vitrified embryos comparing with fresh embryos (p=0.003), but it was similar between re-vitrified and vitrified embryos. Conclusion: Re-vitrification can alter the expression of Bax, Bcl-2 and ErbB4 genes and developmental rate of mouse embryos in compaction stage. PMID:27679826

Present status of research on Re-186 radiopharmaceuticals at Radioisotope Production Center

Energy Technology Data Exchange (ETDEWEB)

Mutalib, A [Radioisotope Production Center, National Atomic Energy Agency Kawasan PUSPIPTEK, Serpong (Indonesia)

1998-10-01

Rhenium shows a close chemical similarity to technetium and is suitable for radiotherapy because the {beta}-emitting radionuclides {sup 186}Re (t{sub 1/2} 90 h, E{sub {beta}} = 1.1 MeV, E{sub {gamma}} = 137 keV) and {sup 188}Re (t{sub 1/2} = 17 h, E{sub {beta}} = 2.1 MeV). The {gamma}-emission associated with decay of {sup 186}Re is also useful in scintigraphy. The research on {sup 186}Re radiopharmaceuticals at Radioisotope Production Center has been carried out since April 1997. Interest in radioimmunotherapy (RIT) led us to the development of labeling antibodies with rhenium isotopes. Although there are several methods for coupling radiometal to antibody, we prefer an indirect labeling method in which a bifunctional chelating agent is used for coupling of {sup 186}Re to monoclonal antibodies. In this report we outline the study on the preparation of {sup 186}Re DMSA-TFP as precursor for labeling with monoclonal antibody. (author)

Re-engineering caused by ISO-9000 certification

DEFF Research Database (Denmark)

Hvam, Lars; Nielsen, Anders Paarup; Bjarnø, Ole-Christian

1997-01-01

Based on a project performed at a medium-sized producer of medical utensils, reviews some of the problems which the company experienced in connection with the system built up during ISO 9001 certification, and the re-engineering efforts which were performed in order to relieve these problems....... Focuses in particular on a re-structuring of the company’s system for production documentation and its relation to the traceability of their products. This system was radically altered during the project without the traceability requirements being violated or reduced. These changes resulted in a marked...... increase in productivity....

Le mystère du monde quantique

CERN Document Server

Damour, Thibault

2016-01-01

Avec Bob et son chien, Rick, embarquez pour une joyeuse épopée dans les mystères du monde quantique ! La physique quantique est partout autour de nous, tant dans l'infiniment grand que dans l'infiniment petit. Mais ce qu'elle dit du monde qui nous entoure diffère de manière vertigineuse de ce qu'on observe et ressent au quotidien. Partez à la rencontre de ceux qui ont théorisé et créé la physique quantique : Planck, Einstein, le prince de Broglie, Heisenberg, Schrödinger, Bohr, Born, Everett…

Menière-lignende symptomer efter meningeom

DEFF Research Database (Denmark)

Friis, Morten; Klokker, Mads; Fugleholm, Kåre

2010-01-01

A 36-year-old woman who presented with a right sided hearing loss, tinnitus and attacks of dizziness was initially diagnosed with Ménière's disease. A meningioma was found along the posterior surface of the petrosal bone, centred partly on the external aperture of the vestibular aqueduct with no ......A 36-year-old woman who presented with a right sided hearing loss, tinnitus and attacks of dizziness was initially diagnosed with Ménière's disease. A meningioma was found along the posterior surface of the petrosal bone, centred partly on the external aperture of the vestibular aqueduct...

Les paradoxes de la matière

CERN Document Server

2013-01-01

Si nous devons la multitude d’appareils numériques actuels à l’électronique, celle-ci atteint ses limites. Comment les dépasser ? En explorant les propriétés spectaculaires de la matière ! Et les candidats au remplacement de l’électronique sont nombreux : oxytronique, spintronique, plasmonique, magnonique, graphène... Nous réservant aussi bien d’autres surprises - tels les capes d’invisibilité, les plastiques conducteurs, les polymères autocicatrisants, les protections antisismiques, etc - les études sur la matière n’ont pas fini de nous étonner.

Nuclear fuel re-processing plant

International Nuclear Information System (INIS)

Sasaki, Yuko; Honda, Takashi; Shoji, Saburo; Kobayashi, Shiro; Furuya, Yasumasa

1989-01-01

In a nuclear fuel re-processing plant, high Si series stainless steels not always have sufficient corrosion resistance in a solution containing only nitric acid at medium or high concentration. Further, a method of blowing NOx gases may possibly promote the corrosion of equipment constituent materials remarkably. In view of the above, the corrosion promoting effect of nuclear fission products is suppressed without depositing corrosive metal ions as metals in the nitric acid solution. That is, a reducing atmosphere is formed by generating NOx by electrolytic reduction thereby preventing increase in the surface potential of stainless steels. Further, an anode is disposed in the nitric acid solution containing oxidative metal ions to establish an electrical conduction and separate them by way of partition membranes and a constant potential or constant current is applied while maintaining an ionic state so as not to deposit metals. Thus, equipments of re-processing facility can be protected from corrosion with no particular treatment for wastes as radioactive materials. (K.M.)

Determination of radiochemical yields of 186Re-labelled complexes using thin layer chromatography

International Nuclear Information System (INIS)

Konirova, R.; Kohlickova, M.; Jedinakova-Krizova, V.

1999-01-01

The reaction conditions for synthesis of three rhenium complexes 186 Re-methylendiphosphonate (MDP), 186 Re-hydroxyethylidendiphosphonate (HEDP) and 186 Re-citrate have been investigated. Radiochemical yield of complexation has been determined by thin layer chromatography and paper chromatography. The rhenium complexation with corresponding ligand is dependent on pH values of reaction mixture, concentration of studied ligand (MDP, HEDP and sodium citrate) and concentration of reducing agent. Stannous chloride with ascorbic acid (as antioxidant) was used for reduction of perrhenate. The labeling yield of 186 Re-MDP was about 90 %, of 186 Re-HEDP more than 80 % and more than 75 % for 186 Re-citrate under optimum conditions. Besides, the possibility of application of porphyrins as organic ligands for complexation with rhenium isotopes is examined. (authors)

Problems of rotator cuff re-tear cases. Examination of operative findings

International Nuclear Information System (INIS)

Ishitani, Eiichi; Matsuura, Komei; Shin, Kunichika; Kawamoto, Taisaku; Hosokawa, Akira

2007-01-01

High re-tear rate is reported after rotator cuff repair in large and massive tear cases. Previously, we reported that 15% of patients after rotator cuff repair showed re-tear in MRI findings. In this study, 116 consecutive rotator cuff repaired patients who had been operated arthroscopically since 2003 were evaluated for size, torn site, fixation methods, mobility, and tendon quality. In addition, rehabilitation methods and occupation after revision were also evaluated. There were four patients who underwent re-operation. Rotator cuff repairs by revision surgery failed mechanically due to two reasons: the main factor of failure was suture material breakage in three cases and the second was tendon pulling through sutures in one case. The lack of thread strength was suggested. In addition, it is important to pull cuff stump to greater tubercle without excessive tension. Of re-operated cases, three engaging in manual labor suffered large and massive tear. In two cases, premature return to manual labor suggested cause of re-tear. (author)

Design and assembly of ternary Pt/Re/SnO2 NPs by controlling the zeta potential of individual Pt, Re, and SnO2 NPs

Science.gov (United States)

Drzymała, Elżbieta; Gruzeł, Grzegorz; Pajor-Świerzy, Anna; Depciuch, Joanna; Socha, Robert; Kowal, Andrzej; Warszyński, Piotr; Parlinska-Wojtan, Magdalena

2018-05-01

In this study Pt, Re, and SnO2 nanoparticles (NPs) were combined in a controlled manner into binary and ternary combinations for a possible application for ethanol oxidation. For this purpose, zeta potentials as a function of the pH of the individual NPs solutions were measured. In order to successfully combine the NPs into Pt/SnO2 and Re/SnO2 NPs, the solutions were mixed together at a pH guaranteeing opposite zeta potentials of the metal and oxide NPs. The individually synthesized NPs and their binary/ternary combinations were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning transmission electron microscopy (STEM) combined with energy dispersive X-ray spectroscopy (EDS) analysis. FTIR and XPS spectroscopy showed that the individually synthesized Pt and Re NPs are metallic and the Sn component was oxidized to SnO2. STEM showed that all NPs are well crystallized and the sizes of the Pt, Re, and SnO2 NPs were 2.2, 1.0, and 3.4 nm, respectively. Moreover, EDS analysis confirmed the successful formation of binary Pt/SnO2 and Re/SnO2 NP, as well as ternary Pt/Re/SnO2 NP combinations. This study shows that by controlling the zeta potential of individual metal and oxide NPs, it is possible to assemble them into binary and ternary combinations. [Figure not available: see fulltext.

Narrowing the gap: from semiconductor to semimetal in the homologous series of rare-earth zinc arsenides RE(2-y)Zn4As4·n(REAs) and Mn-substituted derivatives RE(2-y)Mn(x)Zn(4-x)As4·n(REAs) (RE = La-Nd, Sm, Gd).

Science.gov (United States)

Lin, Xinsong; Tabassum, Danisa; Mar, Arthur

2015-12-14

A homologous series of ternary rare-earth zinc arsenides, prepared by reactions of the elements at 750 °C, has been identified with the formula RE(2-y)Zn4As4·n(REAs) (n = 2, 3, 4) for various RE members. They adopt trigonal structures: RE(4-y)Zn4As6 (RE = La-Nd), space group R3̄m1, Z = 3; RE(5-y)Zn4As7 (RE = Pr, Nd, Sm, Gd), space group P3̄m1, Z = 1; RE(6-y)Zn4As8 (RE = La-Nd, Sm, Gd), space group R3̄m1, Z = 3. The Zn atoms can be partially substituted by Mn atoms, resulting in quaternary derivatives RE(2-y)Mn(x)Zn(4-x)As4·n(REAs). Single-crystal structures were determined for nine ternary and quaternary arsenides RE(2-y)M4As4·n(REAs) (M = Mn, Zn) as representative examples of these series. The structures are built by stacking close-packed nets of As atoms, sometimes in very long sequences, with RE atoms occupying octahedral sites and M atoms occupying tetrahedral sites, resulting in an intergrowth of [REAs] and [M2As2] slabs. The recurring feature of all members of the homologous series is a sandwich of [M2As2]-[REAs]-[M2As2] slabs, while rocksalt-type blocks of [REAs] increase in thickness between these sandwiches with higher n. Similar to the previously known related homologous series REM(2-x)As2·n(REAs) which is deficient in M, this new series RE(2-y)M4As4·n(REAs) exhibits deficiencies in RE to reduce the electron excess that would be present in the fully stoichiometric formulas. Enthalpic and entropic factors are considered to account for the differences in site deficiencies in these two homologous series. Band structure calculations indicate that the semiconducting behaviour of the parent n = 0 member (with CaAl2Si2-type structure) gradually evolves, through a narrowing of the gap between valence and conduction bands, to semimetallic behaviour as the number of [REAs] blocks increases, to the limit of n = ∞ for rocksalt-type REAs.

From Retreat to Re-engagement: The New American Foreign Policy ...

African Journals Online (AJOL)

From Retreat to Re-engagement: The New American Foreign Policy for ... that the re-engagement with Sub-Saharan Africa, is based on US perception of threats ... in the subordination of the region to the world's only superpower and its allies.

Performance assurance of the re-applying project documentation

Science.gov (United States)

Kozlova, Olga

2017-10-01

Usage of the re-applying project documentation is cost effective measure. Saving of budgetary funds for purchases for development of new project documentation occurs by means of it. It also becomes possible to consider better decisions and prevent the repetition of mistakes. Nowadays, state authorities in construction management are forming separate institute for re-applying project documentation. The article shows the main tasks of such events and the issues to be solved for achievement of a high positive result.

Professional Re-Accreditation: Constructing Educational Policy for Career-Long Teacher Professional Learning

Science.gov (United States)

Watson, Cate; Fox, Alison

2015-01-01

Competence as a measure of "fitness to practice" and its evaluation through mechanisms of personal performance review, has led to the introduction of systems in a number of professions which link appraisal to the maintenance of professional registration (variously referred to as re-validation, re-certification, re-accreditation, etc.).…

Stereotactic body radiation therapy in the re-irradiation situation – a review

International Nuclear Information System (INIS)

Mantel, Frederick; Flentje, Michael; Guckenberger, Matthias

2013-01-01

Although locoregional relapse is frequent after definitive radiotherapy (RT) or multimodal treatments, re-irradiation is only performed in few patients even in palliative settings like e.g. vertebral metastasis. This is most due to concern about potentially severe complications, especially when large volumes are exposed to re-irradiation. With technological advancements in treatment planning the interest in re-irradiation as a local treatment approach has been reinforced. Recently, several studies reported re-irradiation for spinal metastases using SBRT with promising local and symptom control rates and simultaneously low rates of toxicity. These early data consistently indicate that SBRT is a safe and effective treatment modality in this clinical situation, where other treatment alternatives are rare. Similarly, good results have been shown for SBRT in the re-irradiation of head and neck tumors. Despite severe late adverse effects were reported in several studies, especially after single fraction doses >10 Gy, they appear less frequently compared to conventional radiotherapy. Few studies with small patient numbers have been published on SBRT re-irradiation for non-small cell lung cancer (NSCLC). Overall survival (OS) is limited by systemic progression and seems to depend particularly on patient selection. SBRT re-irradiation after primary SBRT should not be practiced in centrally located tumors due to high risk of severe toxicity. Only limited data is available for SBRT re-irradiation of pelvic tumors: feasibility and acceptable toxicity has been described, suggesting SBRT as a complementary treatment modality for local symptom control

Re-engineering pre-employment check-up systems: a model for improving health services.

Science.gov (United States)

Rateb, Said Abdel Hakim; El Nouman, Azza Abdel Razek; Rateb, Moshira Abdel Hakim; Asar, Mohamed Naguib; El Amin, Ayman Mohammed; Gad, Saad abdel Aziz; Mohamed, Mohamed Salah Eldin

2011-01-01

The purpose of this paper is to develop a model for improving health services provided by the pre-employment medical fitness check-up system affiliated to Egypt's Health Insurance Organization (HIO). Operations research, notably system re-engineering, is used in six randomly selected centers and findings before and after re-engineering are compared. The re-engineering model follows a systems approach, focusing on three areas: structure, process and outcome. The model is based on six main components: electronic booking, standardized check-up processes, protected medical documents, advanced archiving through an electronic content management (ECM) system, infrastructure development, and capacity building. The model originates mainly from customer needs and expectations. The centers' monthly customer flow increased significantly after re-engineering. The mean time spent per customer cycle improved after re-engineering--18.3 +/- 5.5 minutes as compared to 48.8 +/- 14.5 minutes before. Appointment delay was also significantly decreased from an average 18 to 6.2 days. Both beneficiaries and service providers were significantly more satisfied with the services after re-engineering. The model proves that re-engineering program costs are exceeded by increased revenue. Re-engineering in this study involved multiple structure and process elements. The literature review did not reveal similar re-engineering healthcare packages. Therefore, each element was compared separately. This model is highly recommended for improving service effectiveness and efficiency. This research is the first in Egypt to apply the re-engineering approach to public health systems. Developing user-friendly models for service improvement is an added value.

Preparation and certification of Re-Os dating reference materials: Molybdenites HLP and JDC

Science.gov (United States)

Du, A.; Wu, S.; Sun, D.; Wang, Shaoming; Qu, W.; Markey, R.; Stain, H.; Morgan, J.; Malinovskiy, D.

2004-01-01

Two Re-Os dating reference material molybdenites were prepared. Molybdenite JDC and molybdenite HLP are from a carbonate vein-type molybdenum-(lead)- uranium deposit in the Jinduicheng-Huanglongpu area of Shaanxi province, China. The samples proved to be homogeneous, based on the coefficient of variation of analytical results and an analysis of variance test. The sampling weight was 0.1 g for JDC and 0.025 g for HLP. An isotope dilution method was used for the determination of Re and Os. Sample decomposition and preconcentration of Re and Os prior to measurement were accomplished using a variety of methods: acid digestion, alkali fusion, ion exchange and solvent extraction. Negative thermal ionisation mass spectrometry and inductively coupled plasma-mass spectrometry were used for the determination of Re and 187Os concentration and isotope ratios. The certified values include the contents of Re and Os and the model ages. For HLP, the Re content was 283.8 ?? 6.2 ??g g-1, 187Os was 659 ?? 14 ng g-1 and the Re-Os model age was 221.4 ?? 5.6 Ma. For JDC, the Re content was 17.39 ?? 0.32 ng g-1, 187Os was 25.46 ?? 0.60 ng g-1 and the Re-Os model age was 139.6 ?? 3.8 Ma. Uncertainties for both certified reference materials are stated at the 95% level of confidence. Three laboratories (from three countries: P.R. China, USA, Sweden) joined in the certification programme. These certified reference materials are primarily useful for Re-Os dating of molybdenite, sulfides, black shale, etc.

Alternation of apoptotic and implanting genes expression of mouse embryos after re-vitrification

Directory of Open Access Journals (Sweden)

Nasrin Majidi Gharenaz

2016-08-01

Full Text Available Background: Nowadays, oocytes and embryos vitrification has become a routine technique. Based on clinical judgment, re-vitrification maybe required. But little is known about re-vitrification impact on genes expression. Objective: The impact of re-vitrification on apoptotic and implanting genes, Bax, Bcl-2 and ErbB4, at compaction stage embryos were evaluated in this study. Materials and Methods: In this experimental study, 8 cell embryos (n=240 were collected from female mature mice, 60-62 hr post HCG injection. The embryos were divided randomly to 3 groups included: fresh (n=80, vitrified at 8 cell stage (n=80, vitrified at 8 cell stage thawed and re-vitrified at compaction stage (n=80. Embryos were vitrified by using cryolock, (open system described by Kuwayama. Q-PCR was used to examine the expression of Bax, Bcl2 ErbB4 genes in derived blastocysts. Results: Our result showed that expanded blastocyst rate was similar between vitrified and re-vitrified groups, while re-vitrified embryos showed significant decrease in expanded blastocyst rate comparing with fresh embryos (p=0.03. In addition, significant difference was observed on apoptotic gene expression when comparing re-vitrified and fresh embryos (p=0.004, however expression of Bax and Bcl-2 (apoptotic genes didn't demonstrate a significant difference between re-vitrified and vitrified groups. The expression rate of ErbB4, an implantation gene was decreased in re-vitrified embryos comparing with fresh embryos (p=0.003, but it was similar between re-vitrified and vitrified embryos. Conclusion: Re-vitrification can alter the expression of Bax, Bcl-2 and ErbB4 genes and developmental rate of mouse embryos in compaction stage

Sodalite as a vehicle to increase Re retention in waste glass simulant during vitrification

Energy Technology Data Exchange (ETDEWEB)

Luksic, Steven A., E-mail: steven.luksic@pnnl.gov; Riley, Brian J.; Parker, Kent E.; Hrma, Pavel

2016-10-15

Technetium (Tc) retention during Hanford waste vitrification can be increased if the volatility can be controlled. Incorporating Tc into a thermally stable mineral phase, such as sodalite, is one way to achieve increased retention. Here, rhenium (Re)-bearing sodalite was tested as a vehicle to transport perrhenate (ReO{sub 4}{sup −}), a nonradioactive surrogate for pertechnetate (TcO{sub 4}{sup −}), into high-level (HLW) and low-activity waste (LAW) glass simulants. After melting HLW and LAW simulant feeds, the retention of Re in the glass was measured and compared with the Re retention in glass prepared from a feed containing Re{sub 2}O{sub 7}. Phase analysis of sodalite in both these glasses across a profile of temperatures describes the durability of Re-sodalite during the feed-to-glass transition. The use of Re sodalite improved the Re retention by 21% for HLW glass and 85% for LAW glass, demonstrating the potential improvement in Tc-retention if TcO{sub 4}{sup −} were to be encapsulated in a Tc-sodalite prior to vitrification. - Highlights: • Re retention is improved by incorporation into sodalite structure. • LAW-type glass shows lower retention but larger improvement with Re-sodalite. • Sodalite is stable to higher temperatures in high-alumina glass melts.

Extraction of Tc(VII) and Re(VII) on TRU resin

Energy Technology Data Exchange (ETDEWEB)

Guerin, Nicolas; Riopel, Remi; Kramer-Tremblay, Sheila [Canadian Nuclear Laboratories (CNL), Chalk River, ON (Canada). Radiobiology and Health Branch; De Silva, Nimal; Cornett, Jack [Ottawa Univ., ON (Canada). Dept. of Earth and Environmental Sciences; Dai, Xiongxin [China Institute for Radiation Protection, Beijing (China)

2017-06-01

TRU resin can be used to rapidly and selectively extract Tc(VII) and Re(VII). The retention capacity curves of Tc(VII) and Re(VII) for HNO{sub 3}, HCl, H{sub 2}SO{sub 4} and H{sub 3}PO{sub 4} solutions were studied and prepared. Tc(VII) and Re(VII) were simultaneously extracted in 2 M H{sub 2}SO{sub 4} and 1.5 M H{sub 3}PO{sub 4} and were effectively separated from Mo(VI) and Ru(III). Tc(VII) and Re(VII) remained strongly bonded to the resin even after washing using a large volume of 2 M H{sub 2}SO{sub 4} at a relatively high flow rate. Also, they were both completely eluted from the resin using 15 mL of near boiling water, an eluent directly compatible for ICP-MS instrument measurements.

Timing of Re-Transfusion Drain Removal Following Total Knee Replacement

Science.gov (United States)

Leeman, MF; Costa, ML; Costello, E; Edwards, D

2006-01-01

INTRODUCTION The use of postoperative drains following total knee replacement (TKR) has recently been modified by the use of re-transfusion drains. The aim of our study was to investigate the optimal time for removal of re-transfusion drains following TKR. PATIENTS AND METHODS The medical records of 66 patients who had a TKR performed between October 2003 and October 2004 were reviewed; blood drained before 6 h and the total volume of blood drained was recorded. RESULTS A total of 56 patients had complete records of postoperative drainage. The mean volume of blood collected in the drain in the first 6 h was 442 ml. The mean total volume of blood in the drain was 595 ml. Therefore, of the blood drained, 78% was available for transfusion. CONCLUSION Re-transfusion drains should be removed after 6 h, when no further re-transfusion is permissible. PMID:16551400

Current technology and advances in true re-use of effluents

International Nuclear Information System (INIS)

Cillie, G.G.

1975-01-01

Increasing exploitation of natural water resources has necessitated true re-use of effluents. Such planned re-use is preferable to the indirect or incidental re-use which has hitherto been practised, sometimes indiscriminately. Modern technology provides the means for renovating effluents to any desired quality standard, including human consumption. The major obstacles still confronting widespread application of true re-use are the removal of nitrogen compounds and trace organic residues, including insecticides, herbicides and carcinogens. The need to guarantee hygienic quality by removal or destruction of all pathogens, including viruses and parasites, constitutes a major cost item. Radiation techniques may well be applied for sterilization and for destruction of organic radicals. A combination of various unit processes, for which design criteria and hardware are readily available, can be used to produce potable water at a cost of some 10 cents/m 3 for a 45 Ml/d plant. (author)

Immediate re-transplantation following early kidney transplant thrombosis.

LENUS (Irish Health Repository)

Phelan, Paul J

2011-08-01

Allograft thrombosis is a devastating early complication of renal transplantation that ultimately leads to allograft loss. We report here on our experience of nine cases of immediate re-transplantation following early kidney transplant thrombosis at a single centre between January 1990 and June 2009. The mean age was 42.9 years at time of transplant. For seven patients, the allograft thrombosis was their first kidney transplant and seven of the nine cases had a deceased donor transplant. The initial transplants functioned for a mean of 1.67 days and the patients received a second allograft at a mean of 3.1 days after graft failure. All of the re-transplants worked immediately. Four allografts failed after a mean of 52.5 months (2-155 months). Two of these died with a functioning allograft, one failed owing to chronic allograft nephropathy and one owing to persistent acute cellular rejection. The remaining five patients still have a functioning allograft after a mean of 101.8 months (7-187 months). One year allograft and patient survival after re-transplantation were 87.5% and 100% respectively (after 5 years, both were 57%). Immediate re-transplantation following early kidney transplant thrombosis can be a success. It may be considered in selected cases after allograft thrombosis.

Feasibility of re-melting NORM-contaminated scrap metal

Energy Technology Data Exchange (ETDEWEB)

Winters, S. J.; Smith, K. P.

1999-10-26

Naturally occurring radioactive materials (NORM) sometimes accumulate inside pieces of equipment associated with oil and gas production and processing activities. Typically, the NORM accumulates when radium that is present in solution in produced water precipitates out in scale and sludge deposits. Scrap equipment containing residual quantities of these NORM-bearing scales and sludges can present a waste management problem if the radium concentrations exceed regulatory limits or activate the alarms on radiation screening devices installed at most scrap metal recycling facilities. Although NORM-contaminated scrap metal currently is not disposed of by re-melting, this form of recycling could present a viable disposition option for this waste stream. Studies indicate that re-melting NORM-contaminated scrap metal is a viable recycling option from a risk-based perspective. However, a myriad of economic, regulatory, and policy issues have caused the recyclers to turn away virtually all radioactive scrap metal. Until these issues can be resolved, re-melting of the petroleum industry's NORM-impacted scrap metal is unlikely to be a widespread practice. This paper summarizes the issues associated with re-melting radioactive scrap so that the petroleum industry and its regulators will understand the obstacles. This paper was prepared as part of a report being prepared by the Interstate Oil and Gas Compact Commission's NORM Subcommittee.

76 FR 64963 - Re-Accreditation and Re-Approval of OMNI Hydrocarbon Measurement, Inc. as a Commercial Gauger

Science.gov (United States)

2011-10-19

..., Inc., Crosby, Texas, as a commercial gauger. SUMMARY: Notice is hereby given that, pursuant to 19 CFR 151.13, Omni Hydrocarbon Measurement, Inc., Crosby, Texas 77532, has been re- approved to gauge...

ReSeg: A Recurrent Neural Network-Based Model for Semantic Segmentation

OpenAIRE

Visin, Francesco; Ciccone, Marco; Romero, Adriana; Kastner, Kyle; Cho, Kyunghyun; Bengio, Yoshua; Matteucci, Matteo; Courville, Aaron

2015-01-01

We propose a structured prediction architecture, which exploits the local generic features extracted by Convolutional Neural Networks and the capacity of Recurrent Neural Networks (RNN) to retrieve distant dependencies. The proposed architecture, called ReSeg, is based on the recently introduced ReNet model for image classification. We modify and extend it to perform the more challenging task of semantic segmentation. Each ReNet layer is composed of four RNN that sweep the image horizontally ...

Possibilities of radiation sterilization for re-usage of medical devices in the medical management

International Nuclear Information System (INIS)

Tabei, Masae; Kudo, Hisaaki; Katsumura, Yosuke

2004-01-01

The rule for re-usage of medical single-use devices was established in US in 2000 based on the concept of Managed Care (total management of medicare on cost, quality and patients' satisfaction) and 20-30% of those devices are re-used at present. The re-usage is conducted in not only US but also Canada, Denmark, UK, India, China etc. Standing on the viewpoint, this paper described and discussed the possibility of re-usage of the single-use devices now prohibited in Japan, possible re-sterilization, possible re-usage of hollow fiber-type hemodialyzer following γ-ray sterilization with consideration for D-values against bacteria and viruses, cost estimation of electron beam sterilization for re-usage, and radiation sterilization of waste water and plastic materials. Radiation sterilization for re-usage of medical devices was concluded possible if their materials and records for their usage processes are proper, and should be conducted in a large scale after sufficient examinations by industries/government/academia. (N.I.)

Un copiste inattendu à Vic-sur-Cère (Cantal

Directory of Open Access Journals (Sweden)

Renaud Benoit-Cattin

2012-02-01

Full Text Available A Vic-sur-Cère, petit bourg du Cantal, l’hôtel du Pont et du Parc abrite au rez-de-chaussée une salle de restaurant dont les quatre murs sont ornés de dix-sept peintures d’un caractère peu ou prou monumental. Leur hauteur est d’environ 1,50 m, leur largeur variant de 0,6 à 3,5 m. Quatorze d’entre elles ont été exécutées par Antoine Cayrol entre 1909 et 1914, les trois dernières par son petit-fils, Roger Cayrol, en 1954.Le grand-père, Antoine, né en 1864, est élevé à Paris. Après son service m...

Circumscribing late dark matter decays model-independently

International Nuclear Information System (INIS)

Yueksel, Hasan; Kistler, Matthew D.

2008-01-01

A number of theories, spanning a wide range of mass scales, predict dark matter candidates that have lifetimes much longer than the age of the Universe, yet may produce a significant flux of gamma rays in their decays today. We constrain such late-decaying dark matter scenarios model-independently by utilizing gamma-ray line emission limits from the Galactic Center region obtained with the SPI spectrometer on INTEGRAL, and the determination of the isotropic diffuse photon background by SPI, COMPTEL, and EGRET observations. We show that no more than ∼5% of the unexplained MeV background can be produced by late dark matter decays either in the Galactic halo or cosmological sources.

Radiochemical study of Re/W adsorption behavior on a strongly basic anion exchange resin

International Nuclear Information System (INIS)

Gott, Matthew D.; Missouri Univ., Columbia, MO; Ballard, Beau D.; Redman, Lindsay N.

2014-01-01

Rhenium-186g is a radionuclide with a high potential for therapeutic applications. It emits therapeutic β - particles accompanied by low energy γ-rays, which allows for in-vivo tracking of the radiolabeled compound and dosimetry estimates. The current reactor production pathway 185 Re(n,γ) 186g Re produces low specific activity 186g Re, thereby limiting its therapeutic application. Work is underway to develop an accelerator-based, charged particle induced production method for high specific activity 186g Re from targets of enriched 186 W. To optimize the chemical 186g Re recovery method, batch studies have been performed to characterize the adsorption behavior of Re and W on a strongly basic anion exchange resin. An in-depth physicochemical profile was developed for the interaction of Re with resin material, which showed the reaction to be endothermic and spontaneous. Basic (NaOH) and acidic (HNO 3 ) matrices were used to determine the equilibrium distribution coefficients for Re and W. The resin exhibits the best affinity for Re at slightly basic conditions and little affinity above moderately acidic concentrations. Tungsten has low affinity for the resin above moderately basic concentrations. A study was performed to examine the effect of W concentration on Re adsorption, which showed that even a high ionic WO 4 2- strength of up to 1.9 mol kg -1 does not significantly compromise ReO 4 - retention on the resin. (orig.)

Accretion in Radiative Equipartition (AiRE) Disks

Energy Technology Data Exchange (ETDEWEB)

Yazdi, Yasaman K.; Afshordi, Niayesh, E-mail: yyazdi@pitp.ca, E-mail: nafshordi@pitp.ca [Perimeter Institute for Theoretical Physics, 31 Caroline Street N, Waterloo, ON N2L 2Y5 (Canada)

2017-07-01

Standard accretion disk theory predicts that the total pressure in disks at typical (sub-)Eddington accretion rates becomes radiation pressure dominated. However, radiation pressure dominated disks are thermally unstable. Since these disks are observed in approximate steady state over the instability timescale, our accretion models in the radiation-pressure-dominated regime (i.e., inner disk) need to be modified. Here, we present a modification to the Shakura and Sunyaev model, where the radiation pressure is in equipartition with the gas pressure in the inner region. We call these flows accretion in radiative equipartition (AiRE) disks. We introduce the basic features of AiRE disks and show how they modify disk properties such as the Toomre parameter and the central temperature. We then show that the accretion rate of AiRE disks is limited from above and below, by Toomre and nodal sonic point instabilities, respectively. The former leads to a strict upper limit on the mass of supermassive black holes as a function of cosmic time (and spin), while the latter could explain the transition between hard and soft states of X-ray binaries.

Taevalik trio / Laurence Lumiére

Index Scriptorium Estoniae

Lumiére, Laurence

2000-01-01

Actionfilm "Charlie inglid" : režissöör Joseph McGinty Nichol : peategelased : Drew Barrymore (. Ka produtsent), Cameron Diaz ja Lucy Liu : Ameerika Ühendriigid 2000. Ka : Nädal nr. 47, lk. 90-91

Revision total hip arthoplasty: factors associated with re-revision surgery.

Science.gov (United States)

Khatod, Monti; Cafri, Guy; Inacio, Maria C S; Schepps, Alan L; Paxton, Elizabeth W; Bini, Stefano A

2015-03-04

The survivorship of implants after revision total hip arthroplasty and risk factors associated with re-revision are not well defined. We evaluated the re-revision rate with use of the institutional total joint replacement registry. The purpose of this study was to determine patient, implant, and surgeon factors associated with re-revision total hip arthroplasty. A retrospective cohort study was conducted. The total joint replacement registry was used to identify patients who had undergone revision total hip arthroplasty for aseptic reasons from April 1, 2001, to December 31, 2010. The end point of interest was re-revision total hip arthroplasty. Risk factors evaluated for re-revision total hip arthroplasty included: patient risk factors (age, sex, body mass index, race, and general health status), implant risk factors (fixation type, bearing surface, femoral head size, and component replacement), and surgeon risk factors (volume and experience). A multivariable Cox proportional hazards model was used. Six hundred and twenty-nine revision total hip arthroplasties with sixty-three (10%) re-revisions were evaluated. The mean cohort age (and standard deviation) was 57.0 ± 12.4 years, the mean body mass index (and standard deviation) was 29.5 ± 6.1 kg/m(2), and most of the patients were women (64.5%) and white (81.9%) and had an American Society of Anesthesiologists score of associated with the risk of re-revision. For every ten-year increase in patient age, the hazard ratio for re-revision decreases by a factor of 0.72 (95% confidence interval, 0.58 to 0.90). For every five revision surgical procedures performed by a surgeon, the risk of revision decreases by a factor of 0.93 (95% confidence interval, 0.86 to 0.99). At the time of revision, a new or retained cemented femoral implant or all-cemented hip implant increases the risk of revision by a factor of 3.19 (95% confidence interval, 1.22 to 8.38) relative to a retained or new uncemented hip implant. A ceramic on a

New quaternary indides RE{sub 7}Ni{sub 5-x}Ge{sub 3+x}In{sub 6} (RE = La, Nd, Sm)

Energy Technology Data Exchange (ETDEWEB)

Dominyuk, Nataliya [Lviv Univ. (Ukraine). Dept. of Inorganic Chemistry; Muenster Univ. (Germany). Inst. fuer Anorganische und Analytische Chemie; Zaremba, Vasyl I. [Lviv Univ. (Ukraine). Dept. of Inorganic Chemistry; Poettgen, Rainer [Muenster Univ. (Germany). Inst. fuer Anorganische und Analytische Chemie

2011-04-15

The quaternary indides RE{sub 7}Ni{sub 5-x}Ge{sub 3+x}In{sub 6} (RE = La,Nd, Sm) were synthesized from the elements by arc-melting. Single crystals were grown by slow cooling of the polycrystalline samples. The structures were characterized by powder and single-crystal X-ray diffraction: Ce{sub 7}Ni{sub 4.73}Ge{sub 3.27}In{sub 6} type, P6/m, Z = 1, a = 1147.05(9), c = 426.82(4) pm, wR2 = 0.0652, 528 F{sup 2} values for La{sub 7}Ni{sub 4.46}Ge{sub 3.54}In{sub 6}, a = 1134.5(7), c = 407.1(7) pm, wR2 = 0.0419, 441 F{sup 2} values for Nd{sub 7}Ni{sub 4.91}Ge{sub 3.09}In{sub 6}, and a = 1133.5(2), c = 404.3(1) pm, wR2 = 0.0619, 498 F{sup 2} values for Sm{sub 7}Ni{sub 4.31}Ge{sub 3.69}In{sub 6}, with 25 parameters per refinement. Characteristic features of the RE{sub 7}Ni{sub 5-x}Ge{sub 3+x}In{sub 6} structures are hexagonal, AlB{sub 2}-related prisms around the RE1 atoms and a tricapped, trigonalprismatic coordination of the nickel atoms. (orig.)

Our experience with radiosynoviorthesis and re-radiosynoviorthesis of knees

International Nuclear Information System (INIS)

Kraft, Otakar; Kaspsrek, Richard

2005-01-01

Full text: In this paper the authors present their experience with radiosynoviorthesis (RSO) and re-radiosynoviorthesis (re-RSO) of knees. The objectives of this study were to compare treatment results between first RSO and re-RSO. Before RSO an ultrasonography (USG), an X-ray, a three-phase bone scintigraphy (TPBS). The treatment effect (TE) can be expected if a synovitis is proved by these examinations. To knees we inject 200 MBq of the yttrium citrate. TE is evaluated by the clinical examination, USG and TPBS. If the effect of RSO is not satisfying, RSO can be repeated no sooner than 6 months later. Among our patients we have high percentage of re-RSO. A rate between single RSO and re-RSO was 11:8. From 1986 to December 2004 we treated 1267 knees with Yttrium Citrate 37.9% patients had gonarthrosis, 26.1% chronic synovitis, 20.3% rheumatoid arthritis, 4.6% relapsing fluid, 3.9% psoriatic arthropathy, 3.3% ankylozing spondylarthritis and 1.3% hemophilic arthropathy. The evaluation of TE by patients in 294 RSO (170 patients with single RSO and 124 pts with re-RSO an influence on a pain and a fluid formation after single RSO: 10.9% no influence, 42.2% substantial and long-term effect, 46.9% partial TE and after re-RSO: 8.2% no influence, 36.6% the substantial and long-term TE, 55,2% the partial TE. The best results evaluated by patients were in patients with the rheumatoid arthritis and haemophilia. Worst results were in osteoarthritis in case of considerable radiological changes. Clinical follow up of 110 pts with single RSO and 70 pts with re-RSO: after single RSO: after 6 months in 77% swelling and a filling reduction and in 86% pain reduction, after 1 year in 53% the swelling and the filling reduction and in 62% the pain reduction, after 2 yrs in 28% the swelling and the filling reduction and in 48% the pain reduction; after re-RSO: after 6 months in 62% the swelling and the filling reduction and in 75% the pain reduction, after 1 year in 43% the swelling and

Increased pulmonary vascular permeability as a cause of re-expansion edema in rabbits

International Nuclear Information System (INIS)

Pavlin, D.J.; Nessly, M.L.; Cheney, F.W.

1981-01-01

In order to study the mechanism(s) underlying re-expansion edema, we measured the concentration of labeled albumin (RISA) in the extravascular, extracellular water (EVECW) of the lung as a measure of pulmonary vascular permeability. Re-expansion edema was first induced by rapid re-expansion of rabbit lungs that had been collapsed for 1 wk by pneumothorax. The RISA in EVECW was expressed as a fraction of its plasma concentration: (RISA)L/(RISA)PL. The volume of EVECW (ml/gm dry lung) was measured using a 24 Na indicator. Results in re-expansion edema were compared with normal control lungs and with oleic acid edema as a model of permeability edema. In re-expanded lungs, EVECW (3.41 +/- SD 1.24 ml/g) and (RISA)L/(RISA)PL 0.84 +/- SD 0.15) were significantly increased when compared with normal control lungs (2.25 +/- 0.41 ml/g and 0.51 +/- 0.20, respectively). Results in oleic acid edema (5.66 +/- 2.23 ml/g and 0.84 +/- 0.23) were similar to re-expansion edema. This suggested that re-expansion edema is due to increased pulmonary vascular permeability caused by mechanical stresses applied to the lung during re-expansion

Pressure-induced phase transitions in nanocrystalline ReO3

International Nuclear Information System (INIS)

Biswas, Kanishka; Muthu, D V S; Sood, A K; Kruger, M B; Chen, B; Rao, C N R

2007-01-01

Pressure-induced phase transitions in the nanocrystals of ReO 3 with an average diameter of ∼12 nm have been investigated in detail by using synchrotron x-ray diffraction and the results compared with the literature data of bulk samples of ReO 3 . The study shows that the ambient-pressure cubic I phase (space group Pm3-barm) transforms to a monoclinic phase (space group C 2/c), then to a rhombohedral I phase (space group R3-barc), and finally to another rhombohedral phase (rhombohedral II, space group R3-barc) with increasing pressure over the 0.0-20.3 GPa range. The cubic I to monoclinic transition is associated with the largest volume change (∼5%), indicative of a reconstructive transition. The transition pressures are generally lower than those known for bulk ReO 3 . The cubic II (Im3-bar) or tetragonal (P4/mbm) phases do not occur at lower pressures. The nanocrystals are found to be more compressible than bulk ReO 3 . On decompression to ambient pressure, the structure does not revert back to the cubic I structure

Simple re-instantiation of small databases using cloud computing.

Science.gov (United States)

Tan, Tin Wee; Xie, Chao; De Silva, Mark; Lim, Kuan Siong; Patro, C Pawan K; Lim, Shen Jean; Govindarajan, Kunde Ramamoorthy; Tong, Joo Chuan; Choo, Khar Heng; Ranganathan, Shoba; Khan, Asif M

2013-01-01

Small bioinformatics databases, unlike institutionally funded large databases, are vulnerable to discontinuation and many reported in publications are no longer accessible. This leads to irreproducible scientific work and redundant effort, impeding the pace of scientific progress. We describe a Web-accessible system, available online at http://biodb100.apbionet.org, for archival and future on demand re-instantiation of small databases within minutes. Depositors can rebuild their databases by downloading a Linux live operating system (http://www.bioslax.com), preinstalled with bioinformatics and UNIX tools. The database and its dependencies can be compressed into an ".lzm" file for deposition. End-users can search for archived databases and activate them on dynamically re-instantiated BioSlax instances, run as virtual machines over the two popular full virtualization standard cloud-computing platforms, Xen Hypervisor or vSphere. The system is adaptable to increasing demand for disk storage or computational load and allows database developers to use the re-instantiated databases for integration and development of new databases. Herein, we demonstrate that a relatively inexpensive solution can be implemented for archival of bioinformatics databases and their rapid re-instantiation should the live databases disappear.

Re-qualification of MTR-type fuel plates fabrication process

International Nuclear Information System (INIS)

Elseaidy, I.M.; Ghoneim, M.M.

2010-01-01

The fabricability issues with increased uranium loading due to use low enrichment of uranium (LEU), i.e. less than 20 % of U 235 , increase the problems which occur during compact manufacturing, roll bonding of the fuel plates, potential difficulty in forming during rolling process, mechanical integrity of the core during fabrication, potential difficulty in meat homogeneity, and the ability to fabricate plates with thicker core as a means of increasing total uranium loading. To produce MTR- type fuel plates with high uranium loading (HUL) and keep the required quality of these plates, many of qualification process must be done in the commissioning step of fuel fabrication plant. After that any changing of the fabrication parameters, for example changing of any of the raw materials, devises, operators, and etc., a re- qualification process should be done in order to keep the quality of produced plates. Objective of the present work is the general description of the activities to be accomplished for re-qualification of manufacturing MTR- type nuclear fuel plates. For each process to be re-qualified, a detailed of re-qualification process were established. (author)

The Feasibility of Pellet Re-Fuelling of a Fusion Reactor

DEFF Research Database (Denmark)

Chang, Tinghong; Jørgensen, L. W.; Nielsen, P.

1980-01-01

The feasibility of re-fuelling a fusion reactor by injecting pellets of frozen hydrogen isotopes is reviewed. First a general look is taken of the dominant energy fluxes received by the pellet, the re-fuelling rate required and the relation between pellet size, injection speed and frequency...

Experimental study of the biological properties of 188Re-Hepama-1 biologic superparamagnetic nanoparticles

International Nuclear Information System (INIS)

Feng Yanlin; Tan Jiaju; Sun Jing; Wen Guanghua; Wu Xiaolian; Liang Sheng; Xia Jiaoyun

2007-01-01

Objective: To investigate a new biologic-superparamagnetic nanoparticles's characteristics of immunological activity, biological distributing in vivo, targeting and inhibiting tumor effect. Methods: The experimental group 188 Re-Hepama-l-superparamagnetic nanoparticles, and control groups, including 188 ReO 4 - , 188 Re-Hepama-1, and 188 Re-superparamagnetic nanoparticles, were set up. The distributions were measured after injection 4 h and 24 h by caudal vein of Kuming mice. The magnetic targeting experiments in vivo were clone with and without magnetic field in liver after injection in New Zealand rabbit. The inhibiting tumor effect on hepatic cancer cell lines SMMC-7721 of the above four 188 Re labeled products were measured by mono nuclear cell direct cytotoxicity assay method. Results: After injection 4 h and 24 h by vein, the liver taking was highest in group 188 Re-Hepama-l-superparamagnetic nanoparticles. The radiative activity in liver in magnetism zoo was higher than in non magnetism zoo in 188 Re- Hepama-1-superparamagnetic nanoparticles after applying magnetic field in left lobe of liver, and the ratio of in magnetism zoo to non magnetism zoo was 1.87. And the half effective inhibition radioactive concentrations (IC 50 ) in 188 Re-Hepama-l-superparamagnetic nanoparticles was one forth of 188 ReO 4 - . Conclusion: 188 Re- Hepama-l-superparamagnetic nanoparticles showed its fine stability in intro, good immunological activity and significant liver target. (authors)

The Re-Fe-S system at 1200, 1100, 1000 and 900 degree C

DEFF Research Database (Denmark)

Karup-Møller, Sven; Makovicky, E.

1999-01-01

Phase relations in the dry condensed phase system Fe-Re-S from 1200oC down to 900oC involve S-poor Fe-S melt with up to 0.2 at.% dissolved Re, S-rich melt with 0.3-0.4 at.% dissolved Re at 1200oC, Fe1-xS with Re contents growing from nil for troilite to 0.2 at.% for S-richer compositions, gFe wit...

Best Practices for Cloud Provider Connectivity for R&E Users

CERN Document Server

Bos, Erik-Jan; Kleist, Josva; Foster, David; CERN. Geneva. IT Department

2016-01-01

R&E Networks have been in the business of serving the needs of research and education for decades. A recent development is that more and more R&E Networks are required to support the overall business of research and education for their customers. As R&E institutes have felt the pressure from governments to become more efficient and cost-effective, their interest has turned to cloud solutions for scientific applications as well as back-end office systems. The use of clouds, both commercial and private, is increasing rapidly. Large scale connectivity with cloud providers is a rather new but important area, in which R&E Networks are trying to find their way to add value. Connectivity with commercial cloud providers nowadays is an important topic, and it is becoming crucial that advice to policy makers, decision makers and procurers is given so that over time it will lead to a coherent, scalable and increasingly cost-effective solution for connecting to cloud service providers.

Electronic and optoelectronic device applications based on ReS2

Science.gov (United States)

Liu, Erfu; Long, Mingsheng; Wang, Yaojia; Pan, Yiming; Ho, Chinghwa; Wang, Baigeng; Miao, Feng

Rhenium disulfide (ReS2) is a unique semiconducting TMD with distorted 1T structure and weak interlayer coupling. We have previously investigated its in-plane anisotropic property and electronic applications on FET and digital inverters. In this talk, we will present high responsivity phototransistors based on few-layer ReS2. Depending on the back gate voltage, source drain bias and incident optical light intensity, the maximum attainable photoresponsivity can reach as high as 88,600 A W-1, which is one of the highest value among individual two-dimensional materials with similar device structures. Such high photoresponsivity is attributed to the increased light absorption as well as the gain enhancement due to the existence of trap states in the few-layer ReS2 flakes. The existence of trap states is proved by temperature dependent transport measurements. It further enables the detection of weak signals. Our studies underscore ReS2 as a promising material for future electronic and sensitive optoelectronic applications.

THE BRIGHTENING OF Re50N: ACCRETION EVENT OR DUST CLEARING?

International Nuclear Information System (INIS)

Chiang, Hsin-Fang; Reipurth, Bo; Connelley, Michael S.; Walawender, Josh; Pessev, Peter; Geballe, T. R.; Best, William M. J.; Paegert, Martin

2015-01-01

The luminous Class I protostar HBC 494, embedded in the Orion A cloud, is associated with a pair of reflection nebulae, Re50 and Re50N, which appeared sometime between 1955 and 1979. We have found that a dramatic brightening of Re50N has taken place sometime between 2006 and 2014. This could result if the embedded source is undergoing a FUor eruption. However, the near-infrared spectrum shows a featureless very red continuum, in contrast to the strong CO bandhead absorption displayed by FUors. Such heavy veiling, and the high luminosity of the protostar, is indicative of strong accretion but seemingly not in the manner of typical FUors. We favor the alternative explanation that the major brightening of Re50N and the simultaneous fading of Re50 is caused by curtains of obscuring material that cast patterns of illumination and shadows across the surface of the molecular cloud. This is likely occurring as an outflow cavity surrounding the embedded protostar breaks through to the surface of the molecular cloud. Several Herbig–Haro objects are found in the region

THE BRIGHTENING OF Re50N: ACCRETION EVENT OR DUST CLEARING?

Energy Technology Data Exchange (ETDEWEB)

Chiang, Hsin-Fang; Reipurth, Bo; Connelley, Michael S. [Institute for Astronomy, University of Hawaii at Manoa, 640 N. Aohoku Place, HI 96720 (United States); Walawender, Josh [Subaru Telescope, National Astronomical Observatory of Japan, Hilo, HI 96720 (United States); Pessev, Peter [Gemini Observatory, Casilla 603, La Serena (Chile); Geballe, T. R. [Gemini Observatory, 670 N. Aohoku Place, Hilo, HI 96720 (United States); Best, William M. J. [Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Paegert, Martin, E-mail: hchiang@ifa.hawaii.edu, E-mail: reipurth@ifa.hawaii.edu, E-mail: joshw@naoj.org, E-mail: pessev@gmail.com, E-mail: tgeballe@gemini.edu, E-mail: wbest@ifa.hawaii.edu, E-mail: martin.paegert@vanderbilt.edu [Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235 (United States)

2015-05-20

The luminous Class I protostar HBC 494, embedded in the Orion A cloud, is associated with a pair of reflection nebulae, Re50 and Re50N, which appeared sometime between 1955 and 1979. We have found that a dramatic brightening of Re50N has taken place sometime between 2006 and 2014. This could result if the embedded source is undergoing a FUor eruption. However, the near-infrared spectrum shows a featureless very red continuum, in contrast to the strong CO bandhead absorption displayed by FUors. Such heavy veiling, and the high luminosity of the protostar, is indicative of strong accretion but seemingly not in the manner of typical FUors. We favor the alternative explanation that the major brightening of Re50N and the simultaneous fading of Re50 is caused by curtains of obscuring material that cast patterns of illumination and shadows across the surface of the molecular cloud. This is likely occurring as an outflow cavity surrounding the embedded protostar breaks through to the surface of the molecular cloud. Several Herbig–Haro objects are found in the region.

Improved Mo-Re VPS Alloys for High-Temperature Uses

Science.gov (United States)

Hickman, Robert; Martin, James; McKechnie, Timothy; O'Dell, John Scott

2011-01-01

Dispersion-strengthened molybdenum- rhenium alloys for vacuum plasma spraying (VPS) fabrication of high-temperature-resistant components are undergoing development. In comparison with otherwise equivalent non-dispersion-strengthened Mo-Re alloys, these alloys have improved high-temperature properties. Examples of VPS-fabricated high-temperature-resistant components for which these alloys are expected to be suitable include parts of aircraft and spacecraft engines, furnaces, and nuclear power plants; wear coatings; sputtering targets; x-ray targets; heat pipes in which liquid metals are used as working fluids; and heat exchangers in general. These alloys could also be useful as coating materials in some biomedical applications. The alloys consist of 60 weight percent Mo with 40 weight percent Re made from (1) blends of elemental Mo and Re powders or (2) Re-coated Mo particles that have been subjected to a proprietary powder-alloying-and-spheroidization process. For most of the dispersion- strengthening experiments performed thus far in this development effort, 0.4 volume percent of transition-metal ceramic dispersoids were mixed into the feedstock powders. For one experiment, the proportion of dispersoid was 1 volume percent. In each case, the dispersoid consisted of either ZrN particles having sizes <45 m, ZrO2 particles having sizes of about 1 m, HfO2 particles having sizes <45 m, or HfN particles having sizes <1 m. These materials were chosen for evaluation on the basis of previously published thermodynamic stability data. For comparison, Mo-Re feedstock powders without dispersoids were also prepared.

A game theoretic framework for analyzing re-identification risk.

Directory of Open Access Journals (Sweden)

Zhiyu Wan

Full Text Available Given the potential wealth of insights in personal data the big databases can provide, many organizations aim to share data while protecting privacy by sharing de-identified data, but are concerned because various demonstrations show such data can be re-identified. Yet these investigations focus on how attacks can be perpetrated, not the likelihood they will be realized. This paper introduces a game theoretic framework that enables a publisher to balance re-identification risk with the value of sharing data, leveraging a natural assumption that a recipient only attempts re-identification if its potential gains outweigh the costs. We apply the framework to a real case study, where the value of the data to the publisher is the actual grant funding dollar amounts from a national sponsor and the re-identification gain of the recipient is the fine paid to a regulator for violation of federal privacy rules. There are three notable findings: 1 it is possible to achieve zero risk, in that the recipient never gains from re-identification, while sharing almost as much data as the optimal solution that allows for a small amount of risk; 2 the zero-risk solution enables sharing much more data than a commonly invoked de-identification policy of the U.S. Health Insurance Portability and Accountability Act (HIPAA; and 3 a sensitivity analysis demonstrates these findings are robust to order-of-magnitude changes in player losses and gains. In combination, these findings provide support that such a framework can enable pragmatic policy decisions about de-identified data sharing.

Enzyme (re)design: lessons from natural evolution and computation.

Science.gov (United States)

Gerlt, John A; Babbitt, Patricia C

2009-02-01

The (re)design of enzymes to catalyze 'new' reactions is a topic of considerable practical and intellectual interest. Directed evolution (random mutagenesis followed by screening/selection) has been used widely to identify novel biocatalysts. However, 'rational' approaches using either natural divergent evolution or computational predictions based on chemical principles have been less successful. This review summarizes recent progress in evolution-based and computation-based (re)design.

Prostate needle biopsies: interobserver variation and clinical consequences of histopathological re-evaluation

DEFF Research Database (Denmark)

Berg, Kasper Drimer; Toft, Birgitte Grønkaer; Røder, Martin Andreas

2011-01-01

Histopathological grading of prostate cancer (PCa) is associated with significant interobserver variability. This, as well as clinical consequences of histopathological re-evaluation, was investigated. In 350 patients, histopathological re-evaluations of prostate biopsies were compared with primary.......9%. The cancers were assessed with higher GS at re-evaluation in 25.0% of patients in cases with primary GS ≤ 6, while scores were devaluated in 3.0% and 10.3% of the patients with primary GS = 7 and ≥ 8, respectively. Strategies for clinical evaluation and treatment were changed as a result of the biopsy re......-evaluations in 19.7% and 13.1% of patients, respectively. Gleason scoring based on the radical prostatectomy specimen was higher than in both primary reports and re-evaluation of biopsies. Although a relatively high degree of concordance was found between biopsy assessments, the significant trend towards higher...

Analyzing relation between the radioactivity in lanthanum products and the origins of RE chlorides

International Nuclear Information System (INIS)

Wan Rongsheng

2004-01-01

Objective: To analyze the relation between the radioactivity in Lanthanum products and the origins of RE Chlorides. Methods: Using JY-38 plus sequential ICP spectrometer to examine the content of the uranium in the RE Chlorides. Using FJ-2603 low background alpha, beta measurement apparatus to measure total alpha and total beta activities of Lanthanum products. Results: The content of the uranium in the RE Chlorides is much lower in Baotou's than Hunan's. The radioactivity in Lanthanum products are made from the RE Chlorides of Baotou is much lower than that in Hunan's too. The radioactivity in Lanthanum products depends on the origins of RE Chlorides. Conclusion: The basic data were provided for radioactivity in Lanthanum products which are made from RE Chlorides of different places of China. The mathematical model was founded for the reasonable use of resource RE Chlorides

Radiochemical study of Re/W adsorption behavior on a strongly basic anion exchange resin

Energy Technology Data Exchange (ETDEWEB)

Gott, Matthew D. [Los Alamos National Laboratory, Los Alamos, NM (United States). Chemistry Div.; Missouri Univ., Columbia, MO (United States). Dept. of Chemistry; Ballard, Beau D.; Redman, Lindsay N. [Los Alamos National Laboratory, Los Alamos, NM (United States). Chemistry Div.; and others

2014-07-01

Rhenium-186g is a radionuclide with a high potential for therapeutic applications. It emits therapeutic β{sup -} particles accompanied by low energy γ-rays, which allows for in-vivo tracking of the radiolabeled compound and dosimetry estimates. The current reactor production pathway {sup 185}Re(n,γ){sup 186g}Re produces low specific activity {sup 186g}Re, thereby limiting its therapeutic application. Work is underway to develop an accelerator-based, charged particle induced production method for high specific activity {sup 186g}Re from targets of enriched {sup 186}W. To optimize the chemical {sup 186g}Re recovery method, batch studies have been performed to characterize the adsorption behavior of Re and W on a strongly basic anion exchange resin. An in-depth physicochemical profile was developed for the interaction of Re with resin material, which showed the reaction to be endothermic and spontaneous. Basic (NaOH) and acidic (HNO{sub 3}) matrices were used to determine the equilibrium distribution coefficients for Re and W. The resin exhibits the best affinity for Re at slightly basic conditions and little affinity above moderately acidic concentrations. Tungsten has low affinity for the resin above moderately basic concentrations. A study was performed to examine the effect of W concentration on Re adsorption, which showed that even a high ionic WO{sub 4}{sup 2-} strength of up to 1.9 mol kg{sup -1} does not significantly compromise ReO{sub 4}{sup -} retention on the resin. (orig.)

Different diffusion mechanisms of oxygen in ReBa{sub 2}Cu{sub 3}O{sub 7−x} (Re = Y, Ho) single crystals

Energy Technology Data Exchange (ETDEWEB)

Vovk, R.V.; Boiko, Y.I.; Bogdanov, V.V.; Kamchatnaya, S.N.; Goulatis, I.L. [V. N. Karazin Kharkiv National University, 4 Svobody sq., 61077 Kharkiv (Ukraine); Chroneos, A. [Faculty of Engineering, Environment and Computing, Coventry University, Priory Street, Coventry CV1 5FB (United Kingdom); Department of Materials, Imperial College London, London SW7 2AZ (United Kingdom)

2017-05-15

Highlights: • Single file diffusion mechanism of oxygen ions. • Ho modifies the diffusion mechanism in the oxygen sublattice. • Ho changes the efficient interaction of ions in CuO-planes. - Abstract: In the present study, the time dependencies of the resistivity of ReBa{sub 2}Cu{sub 3}O{sub 7−x} (Re=Y, Ho) single crystals with varying degree of deviation from oxygen stoichiometry was investigated. It was shown that the accelerated transport of oxygen ions in the initial stage of the process can be carried out along the one-dimensional non-stoichiometric vacancies’ accumulation by the single file diffusion mechanism. The final phase redistribution of oxygen ions in ReBa{sub 2}Cu{sub 3}O{sub 7−x} (Re = Y, Ho) is described by the classical mechanism of volume diffusion. The substitution of yttrium by holmium significantly affects the charge redistribution and changes the efficient interaction of ions in CuO-planes, thereby modifying the mass transfer diffusion mechanisms in the oxygen sublattice. Thus, a significant length change of the time intervals occurs, corresponding to the oxygen ions’ single file and volume diffusion mechanisms.

Patients' perceptions, treatment need, and complexity of orthodontic re-treatment

NARCIS (Netherlands)

Ren, Yijin; Boxum, Christo; Sandham, John

The aim of the present study was to investigate the subjective perception and objective treatment need and complexity of patients seeking orthodontic re-treatment. One hundred subjects (66 females, 34 males, age 26.7+/-8.2 years) seeking re-treatment were asked to complete a questionnaire which was

Interdisziplinäre Forschung. Merkmale, Einflußfaktoren und Effekte

NARCIS (Netherlands)

Hollaender, Kirsten

2005-01-01

Kurzfassung in deutsch Diese Arbeit untersucht interdisziplinäre Forschung am Beispiel des deutschen Programms Stadtökologie des BMBF. Dieses Programm wurde ausgewählt, weil es als wegweisendes Modell für interdisziplinäre Forschung angesehen werden kann. Auch die Praxis war aktiv einbezogen in Form

Potteri filmi režissöör murdis needuse

Index Scriptorium Estoniae

2007-01-01

Harry Potteri viienda filmi "Harry Potter ja Fööniksi ordu" režissöör David Yates on andnud oma nõusoleku jätkata režissöörina ka järgmise, "Harry Potter ja segavereline prints" filmi juures. Esilinastus 21. nov. 2008

Atomistic mechanisms of ReRAM cell operation and reliability

Science.gov (United States)

Pandey, Sumeet C.

2018-01-01

We present results from first-principles-based modeling that captures functionally important physical phenomena critical to cell materials selection, operation, and reliability for resistance-switching memory technologies. An atomic-scale description of retention, the low- and high-resistance states (RS), and the sources of intrinsic cell-level variability in ReRAM is discussed. Through the results obtained from density functional theory, non-equilibrium Green’s function, molecular dynamics, and kinetic Monte Carlo simulations; the role of variable-charge vacancy defects and metal impurities in determining the RS, the LRS-stability, and electron-conduction in such RS is reported. Although, the statistical electrical characteristics of the oxygen-vacancy (Ox-ReRAM) and conductive-bridging RAM (M-ReRAM) are notably different, the underlying similar electrochemical phenomena describing retention and formation/dissolution of RS are being discussed.

Preserved re-experience of discrete emotions: Amnesia and executive function.

Science.gov (United States)

Stanciu, Marian Andrei; Rafal, Robert D; Turnbull, Oliver H

2018-02-07

Amnesic patients can re-experience emotions elicited by forgotten events, suggesting that brain systems for episodic and emotional memory are independent. However, the range of such emotional memories remains under-investigated (most studies employing just positive-negative emotion dyads), and executive function may also play a role in the re-experience of emotions. This is the first investigation of the intensity of the emotional re-experience of a range of discrete emotions (anger, fear, sadness, and happiness) for a group of amnesic patients. Twenty Korsakoff syndrome (KS) patients and 20 neurologically normal controls listened to four novel emotional vignettes selectively eliciting the four basic emotions. Emotional experience was measured using pen-and-paper Visual Analogue Mood Scales and episodic memory using verbal recollections. After 30 min, the recollection of stories was severely impaired for the patient group, but the emotional re-experience was no different from that of controls. Notably, there was no relationship between episodic recall and the intensity of the four emotions, such that even profoundly amnesic patients reported moderate levels of the target emotion. Exploratory analyses revealed negative correlations between the intensity of basic emotions and executive functions (e.g., cognitive flexibility and response inhibition) for controls but not patients. The results suggest that discrete emotions can be re-experienced independently of episodic memory, and that the re-experience of certain discrete emotions appears to be dampened by executive control. KS patients with absent or mild cognitive symptoms should benefit from emotion-regulation interventions aimed at reducing the recognized affective burden associated with their episodic memory deficit. © 2018 The British Psychological Society.

Die Entwicklungsgeschichte von MyCoRe an der Universität Leipzig

Directory of Open Access Journals (Sweden)

Jens Kupferschmidt

2018-04-01

Full Text Available This article is a short overview on the history and functionality of the MyCoRe project, which is currently developed by various German universities. The MyCoRe-based applications can be used for cataloging and presentation of digitalized objects like papyrus, manuscripts and antique books. MyCoRe is also able to produce different kinds of repository servers.

Antimatière Est-elle la clé de l'Univers?

CERN Multimedia

Grousson, Mathieu

2009-01-01

"De quoi est fait l'Univers? De matière ordinaire et, selon la théorie actuelle, de matière noire et d'énergie noire... dont nul ne sait rien! Et s'il s'agissait plutôt d'antimatière? Car elle permet de réécrire l'histoire du cosmos sans déroger à ses lois et, cette fois, sans nulle zone d'ombre. Reste à vérifier qu'elle antigravite bien..." (14 pages)

Phase formation in systems Re-Se-Br-MBr (M=Li, Na, K, Rb, Cs

International Nuclear Information System (INIS)

Yarovoj, S.S.; Mironov, Yu.V.; Tkachev, S.V.; Fedorov, V.E.

2009-01-01

Phase formation in the systems Re-Se-Br-MBr (M=K, Rb, Cs) has been studied by NMR-spectroscopy and X-ray phase analysis. Polymer complexes Re 6 Se 8 Br 2 and M 2 Re 6 Se 8 Br 4 (M=Cs, Rb), and salts containing cluster anions [Re 6 Se 6 Br 8 ] 2- and [Re 6 Se 7 Br 7 ] 3- are the main products of reactions occurring in molten alkali metal halides in the number of cluster anions [{Re 6 Se 8-n Br n }Br 6 ] (4-n)- (0≤n≤4). Effect of alkali metal cation on the composition and ratios of formed products is established

Comparative studies of antibody anti-CD20 labeled with 188Re

International Nuclear Information System (INIS)

Dias, Carla Roberta de Barros Rodrigues

2010-01-01

Nuclear Medicine is an unique and important modality in oncology and the development of new tumor-targeted radiopharmaceuticals for both diagnosis and therapy is an area of interest for researchers. Rituximab (RTX) is a quimeric monoclonal antibody (mAb) (IgG 1) that specifically binds to CD20 antigen with high affinity and has been successfully used for the treatment of Non-Hodgkin Lymphoma (NHL) of cell B. The CD20 antigen is expressed over more than 90% of cell B NHL. Technetium-99m ( 99m Tc) and rhenium-188 ( 188 Re) are an attractive radionuclide pair for clinical use due to their favorable decay properties for diagnosis ( 99m Tc: T 1/2 = 6 h, γ radiation = 140 keV) and therapy ( 188 Re: T 1/2 = 17 h, maximum β energy = 2.12 MeV) and to their availability in the form of 99 Mo/ 99 mTc and 188 W/ 188 Re generators. The radionuclides can be conjugated to mAb using similar chemical procedures. The aim of this work was to study the labeling of anti-CD20 mAb (RTX) with 188 Re using two techniques: the direct labeling method [ 188 Re(V)] and the labeling method via the carbonyl nucleus [ 188 Re(I)]. Besides the quality control, the radiolabeled mAb was submitted to in vivo, in vitro and ex vivo biological studies. For the direct labeling, RTX was reducing by incubation with 2-mercaptoethanol for generating sulphydryl groups (-SH) and further labeled with 188 Re(V), in a study of several parameters in order to reach an optimized formulation. The labeling via the carbonyl nucleus both 99 mTc and 188 Re were employed through 2 different procedures: (1) labeling of intact RTX with 99 mTc(I) and (2) reduced RTX (RTX red ) labeled with 99 mTc(I)/ 188 Re(I). Also a parameter study was performed to obtain an optimized formulation. The quality control method for evaluating the radiochemical purity showed a good labeling yield (93%) for the direct method. The labeling method via carbonyl group, the results showed that the - SH groups of RTX red are a possible way of labeling

LHC Report: Rocky re-start

CERN Multimedia

Barbara Holzer for the LHC Team

2012-01-01

A rocky re-start with beam followed a successful machine development period and the first technical stop of 2012. Today, Friday 11 May, the machine began running again with 1380 bunches.   A short, two-day machine development period was successfully completed on 21-22 April. It focused on topics relevant for the 2012 physics beam operation. This was then followed by a five-day technical stop, the first of the year. The technical stop finished on time on Friday 26 April. The re-start with beam was somewhat tortuous and hampered by an unlucky succession of technical faults leading to extended periods of downtime. The planned intensity increase was put on hold for three days with the machine operating with 1092 bunches and a moderate bunch intensity of 1.3x1011 protons. This delivered a reasonable peak luminosity of 3.6x1033 cm-2s-1 to ATLAS and CMS. Higher than usual beam losses were observed in the ramp and squeeze, and time was required to investigate the causes and to implement mitigati...

Microstructure and magnetic properties of Nd-Fe-B-(Re, Ti alloys

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Hasiak Mariusz

2015-03-01

Full Text Available The microstructure and magnetic properties of nanocomposite hard magnetic Nd-Fe-B-(Re, Ti materials with different Nd and Fe contents are studied. The role of Re and Ti addition in phase composition and volume fraction of the Nd-Fe-B phase is determined. All samples are annealed at the same temperature of 993 K for 10 min. Mössbauer spectroscopy shows that the addition of 4 at.% of Re to the Nd8Fe78B14 alloy leads to creation of an ineligible amount of the magnetically hard Nd2Fe14B phase. Moreover, the microstructure and magnetic characteristics recorded in a wide range of temperatures for the Nd8Fe79−xB13Mx (x = 4; M = Re or Ti alloys are also analyzed.

Room temperature synthesis of ReS2 through aqueous perrhenate sulfidation

Science.gov (United States)

Borowiec, Joanna; Gillin, William P.; Willis, Maureen A. C.; Boi, Filippo S.; He, Y.; Wen, J. Q.; Wang, S. L.; Schulz, Leander

2018-02-01

In this study, a direct sulfidation reaction of ammonium perrhenate (NH4ReO4) leading to a synthesis of rhenium disulfide (ReS2) is demonstrated. These findings reveal the first example of a simplistic bottom-up approach to the chemical synthesis of crystalline ReS2. The reaction presented here takes place at room temperature, in an ambient and solvent-free environment and without the necessity of a catalyst. The atomic composition and structure of the as-synthesized product were characterized using several analysis techniques including energy dispersive x-ray spectroscopy, x-ray photoelectron spectroscopy, x-ray diffraction, transmission electron microscopy, Raman spectroscopy, thermogravimetric analysis and differential scanning calorimetry. The results indicated the formation of a lower symmetry (1Tʹ) ReS2 with a low degree of layer stacking.

The Reforms to the Presidential Re-election in Latin America

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Ilka Treminio Sánchez

2013-01-01

Full Text Available This article examines the topic of the constitutional changes regulating the presidential re-election in Latin America. It establishes historical segments of change and it deals particularly with the so-called 21st century’s “Re-election Wave”. The main objective of the present work is to develop a characterization of the cases that have taken place according to the type of re-election reform outcome and the decision process preceding it. This approach is intended to clarify the routes followed in achieving a certain constitutional result and shed light on the factors that shape this new political trend in Latin America.

Beneficial Re-Use of Metal from Decommissioning of Power Reactors

International Nuclear Information System (INIS)

Eshleman, Troy; Raw, Graham; Moloney, Barry

2014-01-01

Utilities and contractors decommissioning nuclear power reactors can recycle a high proportion of the scrap metal generated during dismantling either by free release for general re-use directly from the point of generation, or by recycling off-site at facilities specifically licensed for radioactive material. The worldwide commercial vendors operate different commercial models of volumetric decontamination of ferrous metals by thermal treatment. Some aim to achieve free release of output metals for general use, while others accept higher activity metals as feedstock for the manufacture of steel products which contain residual radioactivity, which we term 'Beneficial Re-use'. It is estimated that 10-30% of metals from light water reactor decommissioning have been exposed to neutron radiation (activated) and/or are contaminated to such an extent that free release is not achievable. This paper outlines a cost-effective alternative to managed storage or disposal for lightly activated or contaminated metal, utilising a 'Beneficial Re-Use' programme which has been in routine operation in the United States for over 20 years. 'Beneficial Re-Use' describes the manufacture of products such as radiation shielding from radioactive scrap metal. Unlike recycling practised in Europe, such products remain under control in licensed facilities and the metal does not find its way into general circulation or consumer products. Since 1992, EnergySolutions and its predecessor Duratek has been melting scrap at their Bear Creek, Tennessee facility to produce shield blocks for use in high energy research facilities. Over 62,300 t of scrap steel have been re-used, and the demand for shielding products continues long into the future. 3,000 t of this feedstock originated outside the US. This paper proposes the potential for activated steel that will not be acceptable at European recycling facilities to enter the Beneficial Re-use programme. Acceptance criteria

Country Report: Rep. of Korea. {sup 188}re-Tricabonyl Labeling Strategy: Preparation of 1{sup 188}Re(I) Tricarbonyl Precursor [{sup 188}Re(OH{sub 2}){sub 3}(CO){sub 3}]+ for the Labeling of Biomolecules

Energy Technology Data Exchange (ETDEWEB)

Park, Sang Hyun [Radiation Research Division for Biotechnology, Korea Atomic Energy Research Institute (Korea, Republic of)

2010-07-01

The {sup 99m}Tc(I) and {sup 188}Re(I) tricarbonyl precursors [M(OH{sub 2}){sub 3}(CO){sub 3}]{sup +} have been shown to be excellent starting materials for the synthesis of {sup 99m}Tc(I) and {sup 188}Re(I) tricarbonyl complexes as well as radiolabeling of target-specific biomolecules.{sup 1-8} Recently, a user-friendly kit formulation (IsoLink{sup TM}) was developed using potassium boranocarbonate, K{sub 2}[BH{sub 3}CO{sub 2}], for preparation of the {sup 99m}Tc precursor complex. This solid reagent serves both as a source of carbon monoxide and a reducing agent for technetium. It was also used by Schibli and coworkers for the preparation of the corresponding {sup 188}Re precursor complex (“Schibili’s kit”).{sup 9} This approach involved the reduction of [{sup 188}Re]perrhenate eluate (1 ml) in neutral solution with 3 mg K{sub 2}[BH{sub 3}CO{sub 2}] and 5 mg BH3≅NH3 by incubation at 60 °C for 15 min. The amounts of reducing agents and acid (concentrated phosphoric acid) were carefully balanced not only to avoid fast hydrolysis of the boranes, but also to maintain a sufficiently low pH to stabilize reduced rhenium intermediates. The preparations resulted in yields >85 % of the desired precursor complex. In addition, perrhenate (7±3 %), colloidal {sup 188}ReO{sub 2} (<5 %), and a byproduct of unknown composition were also detected. To increase the yields even further, we evaluated the recently described borohydride exchange resin (BER) as an additional reducing agent and an anion scavengers.

Hybride zelf(re)presentatie in de dagboeken van Hennie Aucamp ...

African Journals Online (AJOL)

Hybride zelf(re)presentatie in de dagboeken van Hennie Aucamp. Jihie Moon. Abstract. English Title: Hybrid self–(re)presentation in the diaries of Hennie Aucamp. English Abstract. This article on Hennie Aucamp approaches his journals as ego-documents. The positional dilemma and identity crisis of Afrikaners in the new ...

Rehabilitation and Re-socialization of Criminals in Iranian Criminal Law.

Science.gov (United States)

Mollaei, Mohammad; Ghayoomzadeh, Mahmood; Mirkhalili, Seyed Mahmoud

2018-02-08

One of the concerns that always remain for the repentant criminal is the condition for his return to society. This concern may be so strong and effective that the criminal may seclude from the society due to the fear of its consequences and may return to crime. Therefore, paying attention to eliminating the social effect of the criminal conviction of criminals can return security to society and return the repentant criminals to normal life. So, all military and social institutions are effective in the re-socialization, in such a way that the re-socialization of criminals requires the provision of social platforms that starts with their own family and expands to society. The main concern of this research is how we can provide the favorable conditions for the re-socialization of repentant criminals that effectively realize the socialization goals. The Islamic Penal Code initiatives in 2013, despite the gaps in this regard, partly help to achieve such goals, but they are not enough. Therefore, the present article focused on the criminals' re-socialization and tried to raise the criminals' re-socialization both socially and criminally. The method was descriptive analytical. The result showed that the Islamic Penal Code, adopted in 2013 on the period of the subsequent effects, needs to be reformed, and the effective social institutions should be raised orderly in such a case.

Design of FHiRE: the Fiber High Resolution Echelle Spectrograph

Science.gov (United States)

Pierce, Michael J.; McLane, Jacob N.; Pilachowski, C. A.; Kobulnicky, Henry; Jang-Condell, Hannah

2018-01-01

The enormous success of the Kepler mission in the discovery of transiting exoplanets implies that the majority of stars have planetary systems. NASA's upcomming Transiting Exoplanet Survey Satellite (TESS) is designed to survey the brightest stars over the entire sky, systems that are accessible to spectroscopic follow-up with mid-sized telescopes. We have undertaken the development of a precision radial velocity spectrograph with the goal of providing ground-based suppoert for TESS. The instrument, known as FHiRE (Fiber High Resolution Echelle spectrograph), is being developed in collaboration with Indiana University and will deployed at the 2.3-meter telescope of the Wyoming InfraRed Observatory (WIRO). FHiRE features a traditional white pupil echelle design with R ~ 60,000 that is fed via two optical fibers from the telescope. Both the science fiber and a simultaneously sampled Thorium-Argon comparison fiber will make use of double mode scramblers. FHiRE itself will be housed within a vacuum enclosure in order to minimize any temperatue variations of the instrument and maximize its radial velocity precision. Together, these two features should enable FHiRE to reach a long-term velocity precision of < 1 m/s. We present the design of FHiRE and its expected performance. In a companion poster (Jang-Condell et al.) we will present the exoplanet science goals of the project.

Uporaba algoritmov inteligence rojev za rešitev problema dostavnih vozil

OpenAIRE

Hlastec, Urban

2018-01-01

V magistrski nalogi smo obravnavali in implementirali algoritem umetne kolonije čebel za reševanje problema dostavnih vozil z več skladišči. Zanimalo nas je, kako so algoritmi s področja inteligence rojev ustrezni in uporabni za reševanje optimizacijskih problemov. V nalogi smo združili algoritem umetne kolonije čebel ter algoritem za reševanje problema dostavnih vozil. Primerjali smo tudi rezultate pred optimizacijo različnih spremenljivk in po in tako ugotovili, kaj najbolj vpliva na hitros...

Fungal Diversity in Lichens: From Extremotolerance to Interactions with Algae

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Lucia Muggia

2018-05-01

Full Text Available Lichen symbioses develop long-living thallus structures even in the harshest environments on Earth. These structures are also habitats for many other microscopic organisms, including other fungi, which vary in their specificity and interaction with the whole symbiotic system. This contribution reviews the recent progress regarding the understanding of the lichen-inhabiting fungi that are achieved by multiphasic approaches (culturing, microscopy, and sequencing. The lichen mycobiome comprises a more or less specific pool of species that can develop symptoms on their hosts, a generalist environmental pool, and a pool of transient species. Typically, the fungal classes Dothideomycetes, Eurotiomycetes, Leotiomycetes, Sordariomycetes, and Tremellomycetes predominate the associated fungal communities. While symptomatic lichenicolous fungi belong to lichen-forming lineages, many of the other fungi that are found have close relatives that are known from different ecological niches, including both plant and animal pathogens, and rock colonizers. A significant fraction of yet unnamed melanized (‘black’ fungi belong to the classes Chaethothyriomycetes and Dothideomycetes. These lineages tolerate the stressful conditions and harsh environments that affect their hosts, and therefore are interpreted as extremotolerant fungi. Some of these taxa can also form lichen-like associations with the algae of the lichen system when they are enforced to symbiosis by co-culturing assays.

The oxidation of ReCl{sub 5} with oleum: synthesis and crystal structure of Re{sub 2}O{sub 4}Cl{sub 4}(SO{sub 4})

Energy Technology Data Exchange (ETDEWEB)

Betke, Ulf; Wickleder, Mathias S. [Carl von Ossietzky University of Oldenburg, Institute of Pure and Applied Chemistry (Germany)

2012-01-15

The reaction of ReCl{sub 5} and fuming sulfuric acid (25 % SO{sub 3}) in a sealed glass tube at 200 C led to red, needle shaped single crystals of Re{sub 2}O{sub 4}Cl{sub 4}(SO{sub 4}) (monoclinic, C2/c, a = 1501.8(2) pm, b = 1545.9(2) pm, c = 945.18(8) pm, β = 98.761(9) , Z = 8). In the crystal structure the [ReO{sub 2}] moieties are linked by [SO{sub 4}]{sup 2-} tetrahedra to chains along the [101] direction. Each sulfate ion connects four rhenium atoms, additional two chloride ions complete the octahedral coordination sphere of each rhenium atom according to {sup 1}{sub ∞}[ReO{sub 2/1}Cl{sub 2/1}(SO{sub 4}){sub 2/4}]. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

MoRe-based and NbN-based tunnel junctions and their characteristics

International Nuclear Information System (INIS)

Shaternik, V.E.; Noskov, V.L.; Chubatyy, V.V.; Larkin, S.Yu.; Sizontov, V.M.; Miroshnikov, A.M.; Karmazin, A.A.

2007-01-01

Full text: Perspective [1] Josephson Mo-Re alloy-oxide-Pb, Mo-Re alloy-normal metal-oxide-Pb and Mo-Re alloy-normal metal-oxide- normal metal-Mo-Re alloy junctions have been fabricated and investigated. Thin (∼50-100 nm) MoRe superconducting films are deposited on Al 2 O 3 substrates by using a dc magnetron sputtering of MoRe target. Normal metal (Sn, Al) thin films are deposited on the MoRe films surfaces by thermal evaporation of metals in vacuum and oxidized to fabricate junctions oxide barriers. Quasiparticle I-V curves of the fabricated junctions were measured in wide range of voltages. To investigate a transparency spread for the fabricated junctions barriers the computer simulation of the measured quasiparticle I-V curves have been done in framework of the model of multiple Andreev reflections in double-barrier junction interfaces. It's demonstrated the investigated junctions can be described as highly asymmetric double-barrier Josephson junctions with great difference between the two barrier transparencies [2,3]. The result of the comparison of experimental quasiparticle I-V curves and calculated ones is proposed and discussed. Results of computer simulation of quasiparticles I-V curves of NbN-based junctions are presented and discussed. Also I-V curves of the fabricated junctions have been measured under microwave irradiation with 60 GHz frequency , clear Shapiro steps in the measured I-V curves were observed and discussed. (authors)

RE-ACTUALIZATION OF BALE BANJAR FUNCTION IN DENPASAR CITY

Directory of Open Access Journals (Sweden)

Suryawati P.

2018-03-01

Full Text Available The aim of this study was to know and understand the re-actualization of bale banjar function in Denpasar City. This study was conducted due to the imbalance between the assumptions and current reality. The data sources of this study were some bale banjar-s in Denpasar City, related informants, and previous research findings. All data were collected using observation, interviews, and literature studies techniques and were analyzed using sociocultural evolution, community rationalization, and commodification theories. The research findings showed that re-actualization of bale banjar function in Denpasar City happened due to the high demand of economic space of capitalist economy and the changes of local society’s way of thinking; re-actualization of bale banjar’s form in Denpasar City could be seen from the changes in style and appearance of the spaces that are now widely designed into two floors. The society used the upper floors as a gathering place and the lower floors are rented as a center of economic activity; re-actualization of bale banjar function in Denpasar City had the implications on the way of thinking, the conception of bale banjar form and function and material culture such as the weakening of social relations among krama banjar.

Childhood cancer survivors' school (re)entry: Australian parents' perceptions.

Science.gov (United States)

McLoone, J K; Wakefield, C E; Cohn, R J

2013-07-01

Starting or returning to school after intense medical treatment can be academically and socially challenging for childhood cancer survivors. This study aimed to evaluate the school (re)entry experience of children who had recently completed cancer treatment. Forty-two semi-structured telephone interviews were conducted to explore parents' perceptions of their child's (re)entry to school after completing treatment (23 mothers, 19 fathers, parent mean age 39.5 years; child mean age 7.76 years). Interviews were analysed using the framework of Miles and Huberman and emergent themes were organised using QSR NVivo8. Parents closely monitored their child's school (re)entry and fostered close relationships with their child's teacher to ensure swift communication of concerns should they arise. The most commonly reported difficulty related to aspects of peer socialisation; survivors either displayed a limited understanding of social rules such as turn taking, or related more to older children or teachers relative to their peers. Additionally, parents placed a strong emphasis on their child's overall personal development, above academic achievement alone. Improved parent, clinician and teacher awareness of the importance of continued peer socialisation during the treatment period is recommended in order to limit the ongoing ramifications this may have on school (re)entry post-treatment completion. © 2013 John Wiley & Sons Ltd.

Père ou pair? Décalages et ajustements co-énonciatifs

Directory of Open Access Journals (Sweden)

Christiane Préneron

2010-12-01

Full Text Available

L’objet de notre analyse dialogique et co-énonciative concerne la forme prise par la relation entre un père et son fi ls au cours d’échanges verbaux. Dans cette dimension relationnelle, nous avons cherché plus particulièrement à éclairer le statut d’énonciateur que chacun octroie à lui-même et à l’autre. Les images qu’un père et un fi ls ont l’un de l’autre et les places qu’ils occupent dans le dialogue sont en partie déterminées par leur statut de père et d’enfant. Ces places ne confi gurent pas un mode relationnel homogène. Au contraire, cet extrait de corpus est frappant par la grande diversité d’attitudes adoptées par le père avec son enfant: tour à tour il lui donne des ordres, des permissions, le réconforte, joue avec lui, lui propose des défi s ou rivalise avec lui. Daniel peut entrer dans le jeu proposé par son père ou s’y opposer, se laisser guider ou refuser, mais aussi être à l’initiative par des demandes ou des jeux. C’est cette diversité que nous tentons de mettre au jour, sachant que certaines séquences se caractérisent plus particulièrement par des décalages entre les interlocuteurs, alors que d’autres conduisent à des ajustements. Si la diversité qui caractérise cet extrait ne saurait être étendue comme caractérisant toute interaction père/enfant, l’analyse qui en est faite peut servir de repère pour l’étude de nouvelles interactions parent/enfant.

Institutionalization of safety re-assessment system for operating nuclear power plants

International Nuclear Information System (INIS)

Kim, H. J.; Cho, J. C.; Min, B. K.; Park, J. S.; Jung, H. D.; Oh, K. M.; Kim, W. K.; Lim, J. H.

1999-01-01

In this study, in-depth reviews of the foreign countries' experiences and practices in applications of the periodic safety review (PSR), backfitting and license renewal systems as well as the current status of nuclear power safety assurance programs and activities in Korea have been performed to investigate the necessity and feasibility of the application of the systems for the domestic operating nuclear power plants and to establish effective strategy and methodology for the institutionalization of a periodic safety re-assessment system appropriate to both the domestic and international nuclear power environments by incorporating the PSR with the backfitting and license renewal systems. For these purposes, the regulatory policy, fundamental principles and detailed requirements for the institutionalization of the safety re-assessment system and the effective measures for active implementation of the backfitting program have been developed and then a comparative study of benefits and shortcomings has been conducted for the three different models of the periodic safety re-assessment system incorporated with either the license renewal or life extension process, which have been considered as practicable ones in the domestic situation. The model chosen in this study as the most appropriate safety re-assessment system is the one that the re-assessments are performed at the interval of ten years throughout the service life of nuclear power plant and the ten-year license renewal or life extension after the expiration of design life can be permitted based on the regulatory review of the re-assessment results and follow-up measures. Finally, this paper has discussed on the details of the requirements, approach and procedures established for the institutionalization of the periodic safety re-assessment system chosen as the most appropriate one for domestic applications

Re-Computation of Numerical Results Contained in NACA Report No. 496

Science.gov (United States)

Perry, Boyd, III

2015-01-01

An extensive examination of NACA Report No. 496 (NACA 496), "General Theory of Aerodynamic Instability and the Mechanism of Flutter," by Theodore Theodorsen, is described. The examination included checking equations and solution methods and re-computing interim quantities and all numerical examples in NACA 496. The checks revealed that NACA 496 contains computational shortcuts (time- and effort-saving devices for engineers of the time) and clever artifices (employed in its solution methods), but, unfortunately, also contains numerous tripping points (aspects of NACA 496 that have the potential to cause confusion) and some errors. The re-computations were performed employing the methods and procedures described in NACA 496, but using modern computational tools. With some exceptions, the magnitudes and trends of the original results were in fair-to-very-good agreement with the re-computed results. The exceptions included what are speculated to be computational errors in the original in some instances and transcription errors in the original in others. Independent flutter calculations were performed and, in all cases, including those where the original and re-computed results differed significantly, were in excellent agreement with the re-computed results. Appendix A contains NACA 496; Appendix B contains a Matlab(Reistered) program that performs the re-computation of results; Appendix C presents three alternate solution methods, with examples, for the two-degree-of-freedom solution method of NACA 496; Appendix D contains the three-degree-of-freedom solution method (outlined in NACA 496 but never implemented), with examples.

ReSS: Resource Selection Service for National and Campus Grid Infrastructure

International Nuclear Information System (INIS)

Mhashilkar, Parag; Garzoglio, Gabriele; Levshina, Tanya; Timm, Steve

2010-01-01

The Open Science Grid (OSG) offers access to around hundred Compute elements (CE) and storage elements (SE) via standard Grid interfaces. The Resource Selection Service (ReSS) is a push-based workload management system that is integrated with the OSG information systems and resources. ReSS integrates standard Grid tools such as Condor, as a brokering service and the gLite CEMon, for gathering and publishing resource information in GLUE Schema format. ReSS is used in OSG by Virtual Organizations (VO) such as Dark Energy Survey (DES), DZero and Engagement VO. ReSS is also used as a Resource Selection Service for Campus Grids, such as FermiGrid. VOs use ReSS to automate the resource selection in their workload management system to run jobs over the grid. In the past year, the system has been enhanced to enable publication and selection of storage resources and of any special software or software libraries (like MPI libraries) installed at computing resources. In this paper, we discuss the Resource Selection Service, its typical usage on the two scales of a National Cyber Infrastructure Grid, such as OSG, and of a campus Grid, such as FermiGrid.

ReSS: Resource Selection Service for National and Campus Grid Infrastructure

Energy Technology Data Exchange (ETDEWEB)

Mhashilkar, Parag; Garzoglio, Gabriele; Levshina, Tanya; Timm, Steve, E-mail: parag@fnal.go, E-mail: garzogli@fnal.go, E-mail: tlevshin@fnal.go, E-mail: timm@fnal.go [Fermi National Accelerator Laboratory, P O Box 500, Batavia, IL - 60510 (United States)

2010-04-01

The Open Science Grid (OSG) offers access to around hundred Compute elements (CE) and storage elements (SE) via standard Grid interfaces. The Resource Selection Service (ReSS) is a push-based workload management system that is integrated with the OSG information systems and resources. ReSS integrates standard Grid tools such as Condor, as a brokering service and the gLite CEMon, for gathering and publishing resource information in GLUE Schema format. ReSS is used in OSG by Virtual Organizations (VO) such as Dark Energy Survey (DES), DZero and Engagement VO. ReSS is also used as a Resource Selection Service for Campus Grids, such as FermiGrid. VOs use ReSS to automate the resource selection in their workload management system to run jobs over the grid. In the past year, the system has been enhanced to enable publication and selection of storage resources and of any special software or software libraries (like MPI libraries) installed at computing resources. In this paper, we discuss the Resource Selection Service, its typical usage on the two scales of a National Cyber Infrastructure Grid, such as OSG, and of a campus Grid, such as FermiGrid.

ReSS: Resource Selection Service for National and Campus Grid Infrastructure

International Nuclear Information System (INIS)

Mhashilkar, Parag; Garzoglio, Gabriele; Levshina, Tanya; Timm, Steve

2009-01-01

The Open Science Grid (OSG) offers access to around hundred Compute elements (CE) and storage elements (SE) via standard Grid interfaces. The Resource Selection Service (ReSS) is a push-based workload management system that is integrated with the OSG information systems and resources. ReSS integrates standard Grid tools such as Condor, as a brokering service and the gLite CEMon, for gathering and publishing resource information in GLUE Schema format. ReSS is used in OSG by Virtual Organizations (VO) such as Dark Energy Survey (DES), DZero and Engagement VO. ReSS is also used as a Resource Selection Service for Campus Grids, such as FermiGrid. VOs use ReSS to automate the resource selection in their workload management system to run jobs over the grid. In the past year, the system has been enhanced to enable publication and selection of storage resources and of any special software or software libraries (like MPI libraries) installed at computing resources. In this paper, we discuss the Resource Selection Service, its typical usage on the two scales of a National Cyber Infrastructure Grid, such as OSG, and of a campus Grid, such as FermiGrid.

Une histoire de la lumière de Platon au photon

CERN Document Server

Maitte, Bernard

2015-01-01

De la sensation commune à la compréhension scientifique, nos idées sur la nature et les propriétés de la lumière ont connu un long cheminement depuis les théories de Platon jusqu'à la maîtrise du photon. L'Antiquité, la civilisation arabo-islamique, la Renaissance européenne et sa révolution scientifique, puis la science classique du me siècle, les avancées modernes enfin, autant de moments dans la riche histoire de nos connaissances sur la lumière. Ce livre décrit l'élaboration tourmentée des idées, tant philosophiques que scientifiques, qui ont scandé cette histoire, tirant profit des succès comme des échecs, des efforts comme des renoncements. "En regardant d'un oeil critique l'histoire de la lumière, nous pourrons accéder à notre tour à cette logique savoureuse et amère que l'on appelle Science." La première édition de ce livre, ici considérablement augmentée, a obtenu le prix Jean-Rostand du meilleur ouvrage de vulgarisation scientifique.

Effect of Re on stacking fault nucleation under shear strain in Ni by atomistic simulation

International Nuclear Information System (INIS)

Liu Zheng-Guang; Wang Chong-Yu; Yu Tao

2014-01-01

The effect of Re on stacking fault (SF) nucleation under shear strain in Ni is investigated using the climbing image nudged elastic band method with a Ni—Al—Re embedded-atom-method potential. A parameter (ΔE sf b ), the activation energy of SF nucleation under shear strain, is introduced to evaluate the effect of Re on SF nucleation under shear strain. Calculation results show that ΔE sf b decreases with Re addition, which means that SF nucleation under shear strain in Ni may be enhanced by Re. The atomic structure observation shows that the decrease of ΔE sf b may be due to the expansion of local structure around the Re atom when SF goes through the Re atom. (rapid communication)

Study on distributed re-clustering algorithm for moblie wireless sensor networks

Directory of Open Access Journals (Sweden)

XU Chaojie

2016-04-01

Full Text Available In mobile wireless sensor networks,node mobility influences the topology of the hierarchically clustered network,thus affects packet delivery ratio and energy consumption of communications in clusters.To reduce the influence of node mobility,a distributed re-clustering algorithm is proposed in this paper.In this algorithm,basing on the clustered network,nodes estimate their current locations with particle algorithm and predict the most possible locations of next time basing on the mobility model.Each boundary node of a cluster periodically estimates the need for re-clustering and re-cluster itself to the optimal cluster through communicating with the cluster headers when needed.The simulation results indicate that,with small re-clustering periods,the proposed algorithm can be effective to keep appropriate communication distance and outperforms existing schemes on packet delivery ratio and energy consumption.

The study of molybdenites through the 187Re-187Os chronometer

International Nuclear Information System (INIS)

Luck, J.M.; Allegre, C.J.

1982-01-01

We determined the Re and Os concentrations in 11 molybdenites of various ages (30-2700 m.y.) and from various areas. No 'common' osmium has been detected and Os was found to be purely radiogenic. Therefore, by comparing the concentrations, we were able to determine 187 Re- 187 Os ages. For most samples these ages are in good agreement with those measured in surrounding rocks and probably correspond to the age of mineralization. However, two or three Re-Os ages seem unreliable being probably related to some rhenium leaching through later metamorphic and/or hydrothermal events: this shows that the petrographic characteristics of ores and the type of crystallization of MoS 2 are important in choosing samples suitable for dating. Re and Os determinations combined with careful petrographic investigations may give important clues on the genesis and evolution of molybdenum ores. (orig.)

Re criticality assessment following reactor core damage in Fukushima unit 2

International Nuclear Information System (INIS)

Jeong, Hae Sun; Song, Jin Ho; Park, Chang Je; Ha, Kwang Soon; Song, Yong Mann; Ryu, Eun Hyun

2012-01-01

Following the severe core damage accident at the Fukushima nuclear power plants (NPPs), many researchers have studied a possible Re criticality caused by core melting or corium. However, no one can accurately examine the internal conditions of the reactor vessel, and thus there have been different opinions from some organizations depending on their assumption and analysis methods. If there is a potential Re criticality in the reactor vessel, some counter plans for the accident management should be established to prevent and mitigate re criticality, and to return the plant to a safe and stable state. In this study, the criticality level following a severe core damage accident was first analyzed using the MCNPX 2.6.0 code. Based on this result, practical strategies in terms of accident management were obtained by charging soluble boron (H 3B O 3) into re flooded water

Hydrothermal synthesis and luminescence of CaMO4:RE3+ (M=W, Mo; RE=Eu, Tb) submicro-phosphors

International Nuclear Information System (INIS)

Lei Fang; Yan Bing

2008-01-01

Submicrometer crystalline CaMO 4 :RE 3+ (M=W, Mo; RE=Eu, Tb) phosphors with a sheelite structure have been synthesized via the hydrothermal process, which were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray-excited luminescence (XEL), UV-vis diffuse reflectance spectra (UV-vis DRS) and scanning electron microscopy (SEM), respectively. The XRD patterns show that both CaWO 4 and CaMoO 4 have the same structure with space group I41/a. The SEM images indicate that the optimal hydrothermal temperature is 120 deg. C for the particles that aggregate with the increase of temperature. The bands ranging from 380 to 510 nm in the XEL spectra of CaWO 4 :Eu 3+ can be attributed to the charge transfer state from the excited 2p orbits of O 2- to the empty orbits of the central W 6+ of the tungstate groups. The comparison between photoluminescent lifetimes and quantum efficiencies of the two phosphors was also investigated in detail. - Graphical abstract: Submicro-crystalline Eu 3+ -activated tungstate CaWO 4 :RE 3+ phosphors with a sheelite structure have been synthesized via the hydrothermal process; the morphology was determined from the hydrothermal temperature. Scanning electron microscopy (SEM) images show that CaWO 4 :Eu 3+ exhibits spherical particles, which can be controlled by the reaction parameters

A systematic review of re-identification attacks on health data.

Science.gov (United States)

El Emam, Khaled; Jonker, Elizabeth; Arbuckle, Luk; Malin, Bradley

2011-01-01

Privacy legislation in most jurisdictions allows the disclosure of health data for secondary purposes without patient consent if it is de-identified. Some recent articles in the medical, legal, and computer science literature have argued that de-identification methods do not provide sufficient protection because they are easy to reverse. Should this be the case, it would have significant and important implications on how health information is disclosed, including: (a) potentially limiting its availability for secondary purposes such as research, and (b) resulting in more identifiable health information being disclosed. Our objectives in this systematic review were to: (a) characterize known re-identification attacks on health data and contrast that to re-identification attacks on other kinds of data, (b) compute the overall proportion of records that have been correctly re-identified in these attacks, and (c) assess whether these demonstrate weaknesses in current de-identification methods. Searches were conducted in IEEE Xplore, ACM Digital Library, and PubMed. After screening, fourteen eligible articles representing distinct attacks were identified. On average, approximately a quarter of the records were re-identified across all studies (0.26 with 95% CI 0.046-0.478) and 0.34 for attacks on health data (95% CI 0-0.744). There was considerable uncertainty around the proportions as evidenced by the wide confidence intervals, and the mean proportion of records re-identified was sensitive to unpublished studies. Two of fourteen attacks were performed with data that was de-identified using existing standards. Only one of these attacks was on health data, which resulted in a success rate of 0.00013. The current evidence shows a high re-identification rate but is dominated by small-scale studies on data that was not de-identified according to existing standards. This evidence is insufficient to draw conclusions about the efficacy of de-identification methods.

A systematic review of re-identification attacks on health data.

Directory of Open Access Journals (Sweden)

Khaled El Emam

Full Text Available Privacy legislation in most jurisdictions allows the disclosure of health data for secondary purposes without patient consent if it is de-identified. Some recent articles in the medical, legal, and computer science literature have argued that de-identification methods do not provide sufficient protection because they are easy to reverse. Should this be the case, it would have significant and important implications on how health information is disclosed, including: (a potentially limiting its availability for secondary purposes such as research, and (b resulting in more identifiable health information being disclosed. Our objectives in this systematic review were to: (a characterize known re-identification attacks on health data and contrast that to re-identification attacks on other kinds of data, (b compute the overall proportion of records that have been correctly re-identified in these attacks, and (c assess whether these demonstrate weaknesses in current de-identification methods.Searches were conducted in IEEE Xplore, ACM Digital Library, and PubMed. After screening, fourteen eligible articles representing distinct attacks were identified. On average, approximately a quarter of the records were re-identified across all studies (0.26 with 95% CI 0.046-0.478 and 0.34 for attacks on health data (95% CI 0-0.744. There was considerable uncertainty around the proportions as evidenced by the wide confidence intervals, and the mean proportion of records re-identified was sensitive to unpublished studies. Two of fourteen attacks were performed with data that was de-identified using existing standards. Only one of these attacks was on health data, which resulted in a success rate of 0.00013.The current evidence shows a high re-identification rate but is dominated by small-scale studies on data that was not de-identified according to existing standards. This evidence is insufficient to draw conclusions about the efficacy of de-identification methods.

An Investigation of the Academic Information Finding and Re-finding Behavior on the Web

Directory of Open Access Journals (Sweden)

Hsiao-Tieh Pu

2014-12-01

Full Text Available Academic researchers often need and re-use relevant information found after a period of time. This preliminary study used various methods, including experiments, interviews, search log analysis, sequential analysis, and observation to investigate characteristics of academic information finding and re-finding behavior. Overall, the participants in this study entered short queries either in finding or re-finding phases. Comparatively speaking, the participants entered greater number of queries, modified more queries, browsed more web pages, and stayed longer on web pages in the finding phase. On the other hand, in the re-finding phase, they utilized personal information management tools to re-find instead of finding again using search engine, such as checking browsing history; moreover, they tend to input less number of queries and stayed shorter on web pages. In short, the participants interacted more with the retrieval system during the finding phase, while they increased the use of personal information management tools in the re-finding phase. As to the contextual clues used in re-finding phase, the participants used less clues from the target itself, instead, they used indirect clues more often, especially location-related information. Based on the results of sequential analysis, the transition states in the re-finding phase was found to be more complex than those in the finding phase. Web information finding and re-finding behavior is an important and novel area of research. The preliminary results would benefit research on Web information re-finding behavior, and provide useful suggestions for developing personal academic information management systems. [Article content in Chinese

Comparison of Os-Os and Re-Os dating results of molybdenites

International Nuclear Information System (INIS)

Xie Zhi; Sun Weidong; Chen Jiangfeng

2002-01-01

Two molybdenite samples from the Middle-Low Reaches of the Yangtze River were dated by both Os-Os and Re-Os methods. Os-Os and Re-Os dating give identical age results for the two samples. An experiment of step distillation of Os-Os method suggests that no isotopic fractionation is observed between fractions obtained by the experiment. The results prove that the Os-Os method can avoid the problems in the Re-Os method, simplify the experimental procedure, give creditable age data, and have unique advantage that no quantitative extracting of Os is required

La première traduction slave de Molière et la naissance du théâtre slovène

Directory of Open Access Journals (Sweden)

Boštjan Marko Turk

2008-12-01

Full Text Available Trois ans après sa première représentation à Versailles, Georges Dandin de Molière a fait l 'objet d'une traduction partielle en slovène réalisée par Franjo Krsto Frankopan. Cette traduction des trois premières scènes peut être objectivement considérée comme l'un des défis les plus ardus de l'histoire littéraire contemporaine. La recherche slovène et internationale l'a tantôt ignoré, tantôt considéré comme lettre morte. La raison en est que, dans ce fragment, Frankopan aurait utilisé le slovène comme langue servant à ridiculiser, comme l'ayaient fait les dramaturges italiens de la Renaissance avec les dialectes slaves. Or, rien n'est plus éloigné de la vérité. Le texte est intégralement écrit en slovène, langue de la mère de Frankopan. Du reste, comme le montre ne serait-ce que l'analyse bergsonienne du comique, Georges Dandin n'est pas un texte comique. Il convient, par contre, de voir le lien entre la traduction du fragment de la pièce de Molière et l'action de Frankopan contre la monarchie habsbourgeoise. Par l'intermédiaire de la diplomatie viennoise, ce dernier cherchait en effet des appuis à la cour du .roi Louis XIV dont l'auteur dramatique comique en titre était précisément Molière. En conclusion, il convient de souligner que le fragment traduit par Frankopan, en tant que premier texte dramatique en langue slovène, invite à remettre en question la datation des débuts du théâtre slovène proposée par les historiens de la littérature.

Re-scan confocal microscopy: scanning twice for better resolution.

Science.gov (United States)

De Luca, Giulia M R; Breedijk, Ronald M P; Brandt, Rick A J; Zeelenberg, Christiaan H C; de Jong, Babette E; Timmermans, Wendy; Azar, Leila Nahidi; Hoebe, Ron A; Stallinga, Sjoerd; Manders, Erik M M

2013-01-01

We present a new super-resolution technique, Re-scan Confocal Microscopy (RCM), based on standard confocal microscopy extended with an optical (re-scanning) unit that projects the image directly on a CCD-camera. This new microscope has improved lateral resolution and strongly improved sensitivity while maintaining the sectioning capability of a standard confocal microscope. This simple technology is typically useful for biological applications where the combination high-resolution and high-sensitivity is required.

Adaptive Re-Use Principles in Historic Hotel Buildings in Melaka And George Town

Directory of Open Access Journals (Sweden)

Ab Wahab Lilawati

2016-01-01

Full Text Available Adaptive re-use of historic buildings is a process of changing the original function of the historic buildings to another function that can optimise the use of existing historic buildings. The selection of appropriate new function is an important factor in determining the success of adaptive re-use of historic buildings. However, adaptive re-use work done on historic buildings on the World Heritage Site is not an easy task due to rules and principles outlined by local and international charters that must be abide by. This research is conducted to gather the true picture of applied adaptive re-use principles that has been done on heritage hotels available in Melaka and George Town World Heritage Sites. This research is started with an inventory that led to the discovery of 35 hotels which applied the principle of adaptive re-use of historic buildings. Based on this finding, 4 historic hotels from adaptive re-use applications have been selected as the case studies. Results of the case studies carried out show that the level of conservation of heritage hotel is moderate and measures of control should be taken to ensure the privileges of heritage hotel. As a result of this research, a number of suggestions are made to ensure that adaptive re-use work done in the future will be conducted as optimum as possible according to the adaptive re-use and conservation principles.

Using GeoRePORT to report socio-economic potential for geothermal development

Energy Technology Data Exchange (ETDEWEB)

Young, Katherine R.; Levine, Aaron

2018-07-01

The Geothermal Resource Portfolio Optimization and Reporting Tool (GeoRePORT, http://en.openei.org/wiki/GeoRePORT) was developed for reporting resource grades and project readiness levels, providing the U.S. Department of Energy a consistent and comprehensible means of evaluating projects. The tool helps funding organizations (1) quantitatively identify barriers, (2) develop measureable goals, (3) objectively evaluate proposals, including contribution to goals, (4) monitor progress, and (5) report portfolio performance. GeoRePORT assesses three categories: geological, technical, and socio-economic. Here, we describe GeoRePORT, then focus on the socio-economic assessment and its applications for assessing deployment potential in the U.S. Socio-economic attributes include land access, permitting, transmission, and market.

Rethinking, re-theorising the concept of modernism in painting and ...

African Journals Online (AJOL)

This paper explores both the European and African concepts of Modernism and its modernity in painting. The idea is to re-examine and re-theorise the understanding of this concept with a view to finding out its true import and impact on the contemporary art scene, especially that of Africa. The works of two African artists are ...

Infestation of Anthonomus grandis (Coleoptera: Curculionidae on re-sprout of cotton plants

Directory of Open Access Journals (Sweden)

José Fernando Jurca Grigolli

2015-06-01

Full Text Available The destruction of cotton crop residues at the end of the crop cycle is a key strategy for the phytosanitary crop management, since its off-season re-sprout can provide sites for feeding and oviposition of pests such as the boll weevil. This study aimed to evaluate the re-sprout capacity of cotton cultivars, as well as their infestation by Anthonomus grandis. A randomized blocks design, in a 3 x 2 factorial arrangement, with three cultivars (FM 910, DeltaOPAL and NuOPAL, two mowing heights (10 cm and 20 cm and four replications, was used. Weekly evaluations were carried out for measuring the percentage of plant re-sprout for both mowing heights, percentage of flower buds infested by the boll weevil and number of adults per re-sprout. Plants mowed at 10 cm presented a lower sprout capacity and consequently less flower buds, reducing the boll weevil population density in the area, while plants mowed at 20 cm showed high re-sprouts rates, seven days after mowing. The FM 910 cultivar had the highest number of re-sprout plants, while the DeltaOPAL cultivar showed the highest number of flower buds and adults per plant, as well as the highest percentage of buds damaged by the boll weevil.

Alveolocapillary model system to study alveolar re-epithelialization

Energy Technology Data Exchange (ETDEWEB)

Willems, Coen H.M.P.; Zimmermann, Luc J.I.; Sanders, Patricia J.L.T.; Wagendorp, Margot; Kloosterboer, Nico [Department of Paediatrics, School for Oncology and Developmental Biology (GROW), Maastricht University Medical Centre, Maastricht (Netherlands); Cohen Tervaert, Jan Willem [Division of Clinical and Experimental Immunology, Department of Internal Medicine, Maastricht University Medical Centre, Maastricht (Netherlands); Duimel, Hans J.Q.; Verheyen, Fons K.C.P. [Electron Microscopy Unit, Department of Molecular Cell Biology, Maastricht University Medical Centre, Maastricht (Netherlands); Iwaarden, J. Freek van, E-mail: f.vaniwaarden@maastrichtuniversity.nl [Department of Paediatrics, School for Oncology and Developmental Biology (GROW), Maastricht University Medical Centre, Maastricht (Netherlands)

2013-01-01

In the present study an in vitro bilayer model system of the pulmonary alveolocapillary barrier was established to investigate the role of the microvascular endothelium on re-epithelialization. The model system, confluent monolayer cultures on opposing sides of a porous membrane, consisted of a human microvascular endothelial cell line (HPMEC-ST1.6R) and an alveolar type II like cell line (A549), stably expressing EGFP and mCherry, respectively. These fluorescent proteins allowed the real time assessment of the integrity of the monolayers and the automated analysis of the wound healing process after a scratch injury. The HPMECs significantly attenuated the speed of re-epithelialization, which was associated with the proximity to the A549 layer. Examination of cross-sectional transmission electron micrographs of the model system revealed protrusions through the membrane pores and close contact between the A549 cells and the HPMECs. Immunohistochemical analysis showed that these close contacts consisted of heterocellular gap-, tight- and adherens-junctions. Additional analysis, using a fluorescent probe to assess gap-junctional communication, revealed that the HPMECs and A549 cells were able to exchange the fluorophore, which could be abrogated by disrupting the gap junctions using connexin mimetic peptides. These data suggest that the pulmonary microvascular endothelium may impact the re-epithelialization process. -- Highlights: ► Model system for vital imaging and high throughput screening. ► Microvascular endothelium influences re-epithelialization. ► A549 cells form protrusions through membrane to contact HPMEC. ► A549 cells and HPMECs form heterocellular tight-, gap- and adherens-junctions.

Génomique comparative et évolutive au sein du complexe d’espèces Leptosphaeria maculans-Leptosphaeria biglobosa

OpenAIRE

Grandaubert , Jonathan

2013-01-01

Leptosphaeria maculans ‘brassicae’ (Lmb) is a filamentous ascomycete from class Dothideomycetes. It belongs to the Leptosphaeria maculans-Leptosphaeria biglobosa species complex which comprises pathogens of crucifers. Lmb is specifically adapted to oilseed rape (Brassica napus) and is responsible for the most damaging disease of this crop: “stem canker”. In order to better understand and control the disease, the host team initiated a genomic project aiming at systematically identify genes inv...

re3data.org - a global registry of research data repositories

Science.gov (United States)

Pampel, Heinz; Vierkant, Paul; Elger, Kirsten; Bertelmann, Roland; Witt, Michael; Schirmbacher, Peter; Rücknagel, Jessika; Kindling, Maxi; Scholze, Frank; Ulrich, Robert

2016-04-01

re3data.org - the registry of research data repositories lists over 1,400 research data repositories from all over the world making it the largest and most comprehensive online catalog of research data repositories on the web. The registry is a valuable tool for researchers, funding organizations, publishers and libraries. re3data.org provides detailed information about research data repositories, and its distinctive icons help researchers to easily identify relevant repositories for accessing and depositing data sets [1]. Funding agencies, like the European Commission [2] and research institutions like the University of Bielefeld [3] already recommend the use of re3data.org in their guidelines and policies. Several publishers and journals like Copernicus Publications, PeerJ, and Nature's Scientific Data recommend re3data.org in their editorial policies as a tool for the easy identification of appropriate data repositories to store research data. Project partners in re3data.org are the Library and Information Services department (LIS) of the GFZ German Research Centre for Geosciences, the Computer and Media Service at the Humboldt-Universität zu Berlin, the Purdue University Libraries and the KIT Library at the Karlsruhe Institute of Technology (KIT). After its fusion with the U.S. American DataBib in 2014, re3data.org continues as a service of DataCite from 2016 on. DataCite is the international organization for the registration of Digital Object Identifiers (DOI) for research data and aims to improve their citation. The poster describes the current status and the future plans of re3data.org. [1] Pampel H, et al. (2013) Making Research Data Repositories Visible: The re3data.org Registry. PLoS ONE 8(11): e78080. doi:10.1371/journal.pone.0078080. [2] European Commission (2015): Guidelines on Open Access to Scientific Publications and Research Data in Horizon 2020. Available: http://ec.europa.eu/research/participants/data/ref/h2020/grants_manual/hi/oa_pilot/h2020-hi

The influence of the Re-Link Trainer on gait symmetry in healthy adults.

Science.gov (United States)

Ward, Sarah; Wiedemann, Lukas; Stinear, Cathy; Stinear, James; McDaid, Andrew

2017-07-01

Walking function post-stroke is characterized by asymmetries in gait cycle parameters and joint kinematics. The Re-Link Trainer is designed to provide kinematic constraint to the paretic lower limb, to guide a physiologically normal and symmetrical gait pattern. The purpose of this pilot study was to assess the immediate influence of the Re-Link Trainer on measures of gait symmetry in healthy adults. Participants demonstrated a significantly lower cadence and a 62% reduction in walking speed in the Re-Link Trainer compared to normal walking. The step length ratio had a significant increase from 1.0 during normal walking to 2.5 when walking in the Re-Link Trainer. The results from this pilot study suggest in its current iteration the Re-Link Trainer imposes an asymmetrical constraint on lower limb kinematics.

Dosimetric evaluation of anti-CD20 labelled with 188Re

International Nuclear Information System (INIS)

Barrio, Graciela; Osso Junior, Joao A.

2011-01-01

Radioimmunotherapy has the potential to deliver lethal radiation energy directly to malignant cells via targeting of radioisotope-conjugated monoclonal antibodies (MAbs) to specific antigens. B-cell lymphoma is a particularly good candidate for radioimmunotherapy because the disease is inherently radiosensitive, malignant cells in the blood, bone marrow, spleen and lymphonodes are accessible, and MAbs have been developed to B-cell surface antigens that do not shed or modulate. Rituximab (RTX), the human IgG1-type chimeric form of the parent murine antibody ibritumomab, is specifically targeted against CD20, a surface antigen expressed by pre-B and mature human B lymphocytes. The use of rhenium-188 from a 188 W/ 188 Re generator system represents an attractive alternative radionuclide for therapy. 188 Re is produced from beta decay of the 188 W parent. In addition to the emission of high-energy electrons (Eβ= 2118 keV), 188 Re also decays with emission of a gamma photon with an energy of 155 keV in 15% abundance. Besides the therapeutic usefulness of 188 Re, the emission of gamma photon is an added advantage since the biodistribution of 188 Re-labeled antibodies can be evaluated in vivo with a gamma camera. Also, rhenium has chemical properties similar to technetium. Thus, both can be conjugated to antibodies using similar chemistry methods. The objective of this work is to prove the usefulness of this radiopharmaceutical based on dosimetric studies, that are also required by the Brazilian Regulatory Agency (ANVISA). (author)

IDC Re-Engineering Phase 3 Development Plan.

Energy Technology Data Exchange (ETDEWEB)

Harris, James M. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Burns, John F. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Pollock, David L. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

2017-01-01

Sandia National Laboratories has prepared a project development plan that proposes how the parties interested in the IDC Re-Engineering system will coordinate its development, testing and transition to operations.

IDC Re-Engineering Phase 3 Development Plan

International Nuclear Information System (INIS)

Harris, James M.; Burns, John F.; Pollock, David L.

2017-01-01

Sandia National Laboratories has prepared a project development plan that proposes how the parties interested in the IDC Re-Engineering system will coordinate its development, testing and transition to operations.

Mixed messages: Re-initiation factors regulate translation of animal mRNAs

OpenAIRE

Obermayer, Benedikt; Rajewsky, Nikolaus

2014-01-01

When ribosomes encounter upstream open reading frames (uORFs) during scanning of the 5' untranslated region (5' UTR), translation of the downstream ORF requires re-initiation. In a recent paper in Nature, Schleich et al. describe metazoan factors which specifically promote re-initiation.

Pancreaticoduodenal injuries: Re-evaluating current management ...

African Journals Online (AJOL)

Background. Pancreaticoduodenal injuries are uncommon owing to the protected position of the pancreas and duodenum in the retroperitoneum. Management depends on the extent of injury. This study was undertaken to document outcome of pancreaticoduodenal injuries and to re-evaluate our approach. Patients and ...

Groundwater re-injection at Fernald: Its role in accelerating the aquifer remedy

International Nuclear Information System (INIS)

Broberg, Kenneth A.; Janke, Robert

2000-01-01

A successful field-scale demonstration of the use of groundwater re-injection at the Fernald Environmental Management Project (FEMP) was recently completed, bringing the U.S. Department of Energy one step closer to achieving an accelerated site remediation. The demonstration marks the end of a several-year effort to evaluate (a) whether re-injection could be conducted efficiently at Fernald and (b) whether the approved aquifer remedy at Fernald would benefit from incorporating re-injection

Sharing and re-use of phylogenetic trees (and associated data) to facilitate synthesis.

Science.gov (United States)

Stoltzfus, Arlin; O'Meara, Brian; Whitacre, Jamie; Mounce, Ross; Gillespie, Emily L; Kumar, Sudhir; Rosauer, Dan F; Vos, Rutger A

2012-10-22

Recently, various evolution-related journals adopted policies to encourage or require archiving of phylogenetic trees and associated data. Such attention to practices that promote sharing of data reflects rapidly improving information technology, and rapidly expanding potential to use this technology to aggregate and link data from previously published research. Nevertheless, little is known about current practices, or best practices, for publishing trees and associated data so as to promote re-use. Here we summarize results of an ongoing analysis of current practices for archiving phylogenetic trees and associated data, current practices of re-use, and current barriers to re-use. We find that the technical infrastructure is available to support rudimentary archiving, but the frequency of archiving is low. Currently, most phylogenetic knowledge is not easily re-used due to a lack of archiving, lack of awareness of best practices, and lack of community-wide standards for formatting data, naming entities, and annotating data. Most attempts at data re-use seem to end in disappointment. Nevertheless, we find many positive examples of data re-use, particularly those that involve customized species trees generated by grafting to, and pruning from, a much larger tree. The technologies and practices that facilitate data re-use can catalyze synthetic and integrative research. However, success will require engagement from various stakeholders including individual scientists who produce or consume shareable data, publishers, policy-makers, technology developers and resource-providers. The critical challenges for facilitating re-use of phylogenetic trees and associated data, we suggest, include: a broader commitment to public archiving; more extensive use of globally meaningful identifiers; development of user-friendly technology for annotating, submitting, searching, and retrieving data and their metadata; and development of a minimum reporting standard (MIAPA) indicating

Qualitative approaches to use of the RE-AIM framework: rationale and methods.

Science.gov (United States)

Holtrop, Jodi Summers; Rabin, Borsika A; Glasgow, Russell E

2018-03-13

There have been over 430 publications using the RE-AIM model for planning and evaluation of health programs and policies, as well as numerous applications of the model in grant proposals and national programs. Full use of the model includes use of qualitative methods to understand why and how results were obtained on different RE-AIM dimensions, however, recent reviews have revealed that qualitative methods have been used infrequently. Having quantitative and qualitative methods and results iteratively inform each other should enhance understanding and lessons learned. Because there have been few published examples of qualitative approaches and methods using RE-AIM for planning or assessment and no guidance on how qualitative approaches can inform these processes, we provide guidance on qualitative methods to address the RE-AIM model and its various dimensions. The intended audience is researchers interested in applying RE-AIM or similar implementation models, but the methods discussed should also be relevant to those in community or clinical settings. We present directions for, examples of, and guidance on how qualitative methods can be used to address each of the five RE-AIM dimensions. Formative qualitative methods can be helpful in planning interventions and designing for dissemination. Summative qualitative methods are useful when used in an iterative, mixed methods approach for understanding how and why different patterns of results occur. In summary, qualitative and mixed methods approaches to RE-AIM help understand complex situations and results, why and how outcomes were obtained, and contextual factors not easily assessed using quantitative measures.

Relationship between Drug Attitudes of Schizophrenic Patients on Discharge and Re-hospitalization

Directory of Open Access Journals (Sweden)

Hannaneh Taghizadeh

2008-08-01

Full Text Available "n "nObjective: Non-compliance is one of the major problems in treatment of patients with schizophrenia. It is also the most significant risk factor for relapse and re-hospitalization. Previous studies showed that 25-70% of all patients with schizophrenia have negative attitudes to drugs. Therefore, the present study aimed to identify the relationship between drug attitude and discharge and the rate of re-hospitalization in patients with schizophrenia. "nMethod: This cohort study was carried out on 200 hospitalized patients with schizophrenia. Drug Attitude Inventory (DAI was completed for all the patients at the time of discharge. All patients were followed-up for one year for ehospitalization. Logistic regression was used to examine the association between drug attitude and specific risk factors. "nResults: The Mean age of patients was 37.34±10.74 years. Positive and negative drug attitudes were 68%.5 and 27% respectively. The rate of rehospitalization was 41.5% during the one year follow-up. The rate of negative attitude was not significantly different between the two groups with and without re-hospitalization. However, the mean DAI score was significantly lower in the re-hospitalized patients. Multivariate analysis showed that lower DAI score and being female were significant and independent risk factors for re-hospitalization. "n "nConclusion: The more negative attitude the patients with schizophrenia had towards drugs, the more rate of re-hospitalization they had. Moreover, female patients are at higher risk for re-hospitalization.

Preparation of 188 Re-lanreotide as a potential tumor therapeutic agent

International Nuclear Information System (INIS)

Bai Hongsheng; Jin Xiaohai; Fan Hongqiang; Jia Bing; Wang Yuqing; Lu Weiwei

2001-01-01

Radiolabeled peptides hold unlimited potential in diagnostic applications and therapy of malignant tumor. Somatostatin analogue peptide (Lanreotide) is labeled directly with 188 Re via the mixture of citrate and tartrate. The influences of reaction conditions such as pH, temperature, amount of stannous chloride, Lanreotide quantity, reaction time on labeling yield are investigated in detail. At the same time, the stability in vitro, quality control and animal test are evaluated. The experimental results show that Lanreotide reacts with 188 Re for 40 min at pH 2 - 3 and 60 degree C, the labeling yield is at range of 88% - 94%. After purification of 188 Re-Lanreotide with Sep-Pak C 18 reverse phase extraction cartridge, the radiochemical purity (RP) is more than 95%. 188 Re-Lanreotide is eliminated rapidly from the blood and is excreted through liver, the uptake of lung and intestine is high

HIFiRE-5 Boundary Layer Transition and HIFiRE-1 Shock Boundary Layer Interaction

Science.gov (United States)

2015-10-01

comparisons to the computational data. It should also be noted that multi-dimensional conduction effects, not accounted for in the flight data analysis...are reasonable for much of the HIFiRE-5 trajectory, and may account for discrepancies between measured and computed laminar and turbulent heat...coasted until the second stage ignited at 15 seconds. Orion burnout occurred at 43 seconds. The payload remained attached to the second stage

Re-excision rates after breast conserving surgery following the 2014 SSO-ASTRO guidelines.

Science.gov (United States)

Heelan Gladden, Alicia A; Sams, Sharon; Gleisner, Ana; Finlayson, Christina; Kounalakis, Nicole; Hosokawa, Patrick; Brown, Regina; Chong, Tae; Mathes, David; Murphy, Colleen

2017-12-01

In 2014, SSO-ASTRO published guidelines which recommended "no ink on tumor" as adequate margins for patients undergoing breast conservation for invasive breast cancer. In 2016, new SSO-ASTRO-ASCO guidelines recommended 2 mm margins for DCIS. We evaluated whether these guidelines affected re-excision rates at our institution. Patients treated with breast conservation surgery from January 1, 2010-March 1, 2016 were identified. Re-excision rates, tumor characteristics, and presence of residual disease were recorded. The 2016 guidelines were retrospectively applied to the same cohort and expected re-excision rates calculated. Re-excision rates did not significantly decline before and after 2014 guideline adoption (11.9% before, 10.9% after; p = 0.65) or when the 2016 guidelines were retrospectively applied (8.4%; p = 0.10). The 2014 and 2016 guidelines had minimal impact on our re-excision rates, as most re-excisions were done for DCIS and 2016 guidelines supported our prior institutional practices of 2 mm margins for these patients. Copyright © 2017 Elsevier Inc. All rights reserved.

Structural, hyperfine and Raman properties of RE2FeSbO7 compounds

International Nuclear Information System (INIS)

Berndt, G.; Silva, K.L.; Ivashita, F.F.; Paesano, A.; Blanco, M.C.; Miner, E.V.P.; Carbonio, R.E.; Dantas, S.M.; Ayala, A.P.; Isnard, O.

2015-01-01

Highlights: • We prepared monophasic RE 2 FeSbO 7 pyrochlores. • RE 2 FeSbO 7 compounds were characterized regarding crystallographic, vibrational and hyperfine properties. • We find out that a site disorder takes place for the RE’s of larger ionic radii. • Lattice parameters, Raman bands and quadrupole splittings were shown to depend correlatedly on the RE ionic radius. - Abstract: Pyrochlores of the RE 2 FeSbO 7 type were synthesized by ball-milling followed by annealing in free atmosphere at high temperatures. The samples prepared were characterized by X-ray diffraction, Raman spectroscopy and 57 Fe Mössbauer spectroscopy, at room temperature. The results showed that RE 2 FeSbO 7 compounds have a cubic structure, i.e., Fd-3m (#227) space group, and that a site disorder takes place for the RE’s of larger ionic radii. Lattice parameters, Raman bands and quadrupole splittings were shown to depend correlatedly on the RE ionic radius. This behavior is discussed in terms of the pyrochlore crystallographic structure

Copper(II) perrhenate Cu(C{sub 3}H{sub 7}OH){sub 2}(ReO{sub 4}){sub 2}: Synthesis from isopropanol and CuReO{sub 4}, structure and properties

Energy Technology Data Exchange (ETDEWEB)

Mikhailova, D., E-mail: d.mikhailova@ifw-dresden.de [Karlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), Hermann-von-Helmholtz-Platz 1, D-76434 Eggenstein-Leopoldshafen (Germany); Institute for Complex Materials, IFW Dresden, Helmholtzstrasse 20, D-01069 Dresden (Germany); Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, D-01187 Dresden (Germany); Engel, J.M. [Materials Science, Technische Universität Darmstadt, Alarich-Weiss-Str. 2, D-64287 Darmstadt (Germany); Schmidt, M. [Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, D-01187 Dresden (Germany); Tsirlin, A.A. [National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn (Estonia); Ehrenberg, H. [Karlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), Hermann-von-Helmholtz-Platz 1, D-76434 Eggenstein-Leopoldshafen (Germany); Materials Science, Technische Universität Darmstadt, Alarich-Weiss-Str. 2, D-64287 Darmstadt (Germany)

2015-12-15

The crystal structure of Cu{sup +}Re{sup 7+}O{sub 4} is capable of a quasi-reversible incorporation of C{sub 3}H{sub 7}OH molecules. A room-temperature reaction between CuReO{sub 4} and C{sub 3}H{sub 7}OH under oxidizing conditions leads to the formation of a novel metal-organic hybrid compound Cu{sup 2+}(C{sub 3}H{sub 7}OH){sub 2}(ReO{sub 4}){sub 2}. Upon heating under reducing conditions, this compound transforms back into CuReO{sub 4}, albeit with ReO{sub 2} and metallic Cu as by-products. The crystal structure of Cu(C{sub 3}H{sub 7}OH){sub 2}(ReO{sub 4}){sub 2} solved from single-crystal X-ray diffraction (Pbca, a=10.005(3) Å, b=7.833(2) Å, and c=19.180(5) Å) reveals layers of corner-sharing CuO{sub 6}-octahedra and ReO{sub 4}-tetrahedra, whereas isopropyl groups are attached to both sides of these layers, thus providing additional connections within the layers through hydrogen bonds. Cu(C{sub 3}H{sub 7}OH){sub 2}(ReO{sub 4}){sub 2} is paramagnetic down to 4 K because the spatial arrangement of the Cu{sup 2+} half-filled orbitals prevents magnetic superexchange. The paramagnetic effective moment of 2.0(1) μ{sub B} is slightly above the spin-only value and typical for Cu{sup 2+} ions. - Highlights: • Novel Cu(C{sub 3}H{sub 7}OH){sub 2}(ReO{sub 4}){sub 2} compound has a sequence of inorganic and organic layers. • Hydrogen bonds provide an additional bonding Isopropanol molecules serve as a reducing agent during decomposition. • No direct Cu-O-Re-O-Cu connections via d{sub x2-y2} orbital of Cu{sup 2+} explain paramagnetism. • Hydrogen bonds provide an additional bonding. • Isopropanol molecules serve as a reducing agent during decomposition.

A case series of re-establishment of neuromuscular block with rocuronium after sugammadex reversal.

Science.gov (United States)

Iwasaki, Hajime; Sasakawa, Tomoki; Takahoko, Kenichi; Takagi, Shunichi; Nakatsuka, Hideki; Suzuki, Takahiro; Iwasaki, Hiroshi

2016-06-01

We report the use of rocuronium to re-establish neuromuscular block after reversal with sugammadex. The aim of this study was to investigate the relationship between the dose of rocuronium needed to re-establish neuromuscular block and the time interval between sugammadex administration and re-administration of rocuronium. Patients who required re-establishment of neuromuscular block within 12 h after the reversal of rocuronium-induced neuromuscular block with sugammadex were included. After inducing general anesthesia and placing the neuromuscular monitor, the protocol to re-establish neuromuscular block was as follows. An initial rocuronium dose of 0.6 mg/kg was followed by additional 0.3 mg/kg doses every 2 min until train-of-four responses were abolished. A total of 11 patients were enrolled in this study. Intervals between sugammadex and second rocuronium were 12-465 min. Total dose of rocuronium needed to re-establish neuromuscular block was 0.6-1.2 mg/kg. 0.6 mg/kg rocuronium re-established neuromuscular block in all patients who received initial sugammadex more than 3 h previously. However, when the interval between sugammadex and second rocuronium was less than 2 h, more than 0.6 mg/kg rocuronium was necessary to re-establish neuromuscular block.

Polytypism and unexpected strong interlayer coupling in two-dimensional layered ReS2

Science.gov (United States)

Qiao, Xiao-Fen; Wu, Jiang-Bin; Zhou, Linwei; Qiao, Jingsi; Shi, Wei; Chen, Tao; Zhang, Xin; Zhang, Jun; Ji, Wei; Tan, Ping-Heng

2016-04-01

Anisotropic two-dimensional (2D) van der Waals (vdW) layered materials, with both scientific interest and application potential, offer one more dimension than isotropic 2D materials to tune their physical properties. Various physical properties of 2D multi-layer materials are modulated by varying their stacking orders owing to significant interlayer vdW coupling. Multilayer rhenium disulfide (ReS2), a representative anisotropic 2D material, was expected to be randomly stacked and lack interlayer coupling. Here, we demonstrate two stable stacking orders, namely isotropic-like (IS) and anisotropic-like (AI) N layer (NL, N > 1) ReS2 are revealed by ultralow- and high-frequency Raman spectroscopy, photoluminescence and first-principles density functional theory calculation. Two interlayer shear modes are observed in AI-NL-ReS2 while only one shear mode appears in IS-NL-ReS2, suggesting anisotropic- and isotropic-like stacking orders in IS- and AI-NL-ReS2, respectively. This explicit difference in the observed frequencies identifies an unexpected strong interlayer coupling in IS- and AI-NL-ReS2. Quantitatively, the force constants of them are found to be around 55-90% of those of multilayer MoS2. The revealed strong interlayer coupling and polytypism in multi-layer ReS2 may stimulate future studies on engineering physical properties of other anisotropic 2D materials by stacking orders.Anisotropic two-dimensional (2D) van der Waals (vdW) layered materials, with both scientific interest and application potential, offer one more dimension than isotropic 2D materials to tune their physical properties. Various physical properties of 2D multi-layer materials are modulated by varying their stacking orders owing to significant interlayer vdW coupling. Multilayer rhenium disulfide (ReS2), a representative anisotropic 2D material, was expected to be randomly stacked and lack interlayer coupling. Here, we demonstrate two stable stacking orders, namely isotropic-like (IS) and

Expectations towards home care re-ablement in Danish municipalities

DEFF Research Database (Denmark)

Fersch, Barbara

2015-01-01

Purpose – Re-abling care of frail older people is highly on the agenda in several countries.The purpose of this paper is to have a closer look at the argumentation used for its establishment by local policy actors in the field and the kind of expectations towards the behaviour of frail older people...... it entails. Design/methodology/approach – The empirical material consists of qualitative interviews with 17local policy actors in two Danish municipalities. The interviews have been analysed with the help of argumentative discourse analysis. Findings – The most important argument for re-abling care appears...... understandings and values of key local actors, the implementation of re-ablement programmes and the users’ perspective were not studied. Originality/value – The paper contributes to the investigation of the shift from universal entitlementas a right to towards market rationalities in Danish elder care....

Corvid re-caching without 'theory of mind': a model.

Science.gov (United States)

van der Vaart, Elske; Verbrugge, Rineke; Hemelrijk, Charlotte K

2012-01-01

Scrub jays are thought to use many tactics to protect their caches. For instance, they predominantly bury food far away from conspecifics, and if they must cache while being watched, they often re-cache their worms later, once they are in private. Two explanations have been offered for such observations, and they are intensely debated. First, the birds may reason about their competitors' mental states, with a 'theory of mind'; alternatively, they may apply behavioral rules learned in daily life. Although this second hypothesis is cognitively simpler, it does seem to require a different, ad-hoc behavioral rule for every caching and re-caching pattern exhibited by the birds. Our new theory avoids this drawback by explaining a large variety of patterns as side-effects of stress and the resulting memory errors. Inspired by experimental data, we assume that re-caching is not motivated by a deliberate effort to safeguard specific caches from theft, but by a general desire to cache more. This desire is brought on by stress, which is determined by the presence and dominance of onlookers, and by unsuccessful recovery attempts. We study this theory in two experiments similar to those done with real birds with a kind of 'virtual bird', whose behavior depends on a set of basic assumptions about corvid cognition, and a well-established model of human memory. Our results show that the 'virtual bird' acts as the real birds did; its re-caching reflects whether it has been watched, how dominant its onlooker was, and how close to that onlooker it has cached. This happens even though it cannot attribute mental states, and it has only a single behavioral rule assumed to be previously learned. Thus, our simulations indicate that corvid re-caching can be explained without sophisticated social cognition. Given our specific predictions, our theory can easily be tested empirically.

Corvid re-caching without 'theory of mind': a model.

Directory of Open Access Journals (Sweden)

Elske van der Vaart

Full Text Available Scrub jays are thought to use many tactics to protect their caches. For instance, they predominantly bury food far away from conspecifics, and if they must cache while being watched, they often re-cache their worms later, once they are in private. Two explanations have been offered for such observations, and they are intensely debated. First, the birds may reason about their competitors' mental states, with a 'theory of mind'; alternatively, they may apply behavioral rules learned in daily life. Although this second hypothesis is cognitively simpler, it does seem to require a different, ad-hoc behavioral rule for every caching and re-caching pattern exhibited by the birds. Our new theory avoids this drawback by explaining a large variety of patterns as side-effects of stress and the resulting memory errors. Inspired by experimental data, we assume that re-caching is not motivated by a deliberate effort to safeguard specific caches from theft, but by a general desire to cache more. This desire is brought on by stress, which is determined by the presence and dominance of onlookers, and by unsuccessful recovery attempts. We study this theory in two experiments similar to those done with real birds with a kind of 'virtual bird', whose behavior depends on a set of basic assumptions about corvid cognition, and a well-established model of human memory. Our results show that the 'virtual bird' acts as the real birds did; its re-caching reflects whether it has been watched, how dominant its onlooker was, and how close to that onlooker it has cached. This happens even though it cannot attribute mental states, and it has only a single behavioral rule assumed to be previously learned. Thus, our simulations indicate that corvid re-caching can be explained without sophisticated social cognition. Given our specific predictions, our theory can easily be tested empirically.

Study on the effectiveness of Responsive Aggression Regulation Therapy (Re-ART)

NARCIS (Netherlands)

Hoogsteder, L.M.; Kuijpers, N.; Stams, G.J.J.M.; van Horn, J.E.; Hendriks, J.; Wissink, I.B.

2014-01-01

This article describes a pre-test/post-test quasi-experimental study of the effectiveness of Responsive Aggression Regulation Therapy (Re-ART), a Dutch intervention for 16- to 21-year-old juveniles. Re-ART aims to decrease severe aggressive behavior using a cognitive behavioral approach combined

Study on the Effectiveness of Responsive Aggression Regulation Therapy (Re-ART)

NARCIS (Netherlands)

Hoogsteder, L.; Kuijpers, N N; Stams, G.J.J.M.; van Horn, J.; Hendriks, J.; Wissink, I.B.

2014-01-01

This article describes a pre-test/post-test quasi-experimental study of the effectiveness of Responsive Aggression Regulation Therapy (Re-ART), a Dutch intervention for 16- to 21-year-old juveniles. Re-ART aims to decrease severe aggressive behavior using a cognitive behavioral approach combined

Symmetry and Equality: Bringing Rancière into the Classroom

Science.gov (United States)

Skarpenes, Ove; Saeverot, Ane Malene

2018-01-01

Jacques Rancière's sophisticated critique of critical theory is the first step in his call for a renewal of a theory of emancipation. In the first part of the article, the authors outline this critique. Rancière combines pedagogy, art and policy in his attempt to develop a new understanding of equality and emancipation. The authors try as…

Attachement mère-enfant et prématurité: quel rôle pour l'infirmière de néonataologie ? : travail de Bachelor

OpenAIRE

Costa, Stéphanie; Coulon, Delphine

2013-01-01

En Suisse, 7.5 % des naissances sont prématurés. Cette prématurité influence le lien entre la mère et le nouveau-né. Le rôle joué par l’infirmière dans cette prise en soin peut favoriser cet attachement.

Adenosis tumor of the breast: a case report

International Nuclear Information System (INIS)

Yoon, Pyeong Ho; Oh, Ki Keun; Jung, Mi Kyeong; Jung, Woo Hee; Shim, Jung Yeon

1995-01-01

Adenosis tumor is a rare tumor of the breast and primarily consists of adenosis. Authors report a case of surgically proved adenosis tumor in a 31-year-old woman. Mammogram showed a lobulated, well-circumscribed mass with several surrounding radiolucent halos. In the center of the mass several linear radiolucent densities were seen with the appearance of a conglomerated well-circumscribed mass such as fibroadenoma. These linear radiolucent densities were consistent with the fat between the fibrous sclerosis in pathologic specimen. Ultrasonogram showed a well-circumscribed mass with homogeneous low echogenicity, partial posterior enhancement, and bilateral acoustic shadowings

Adenosis tumor of the breast: a case report

Energy Technology Data Exchange (ETDEWEB)

Yoon, Pyeong Ho; Oh, Ki Keun; Jung, Mi Kyeong; Jung, Woo Hee; Shim, Jung Yeon [Yonsei University College of Medicine, Seoul (Korea, Republic of)

1995-05-15

Adenosis tumor is a rare tumor of the breast and primarily consists of adenosis. Authors report a case of surgically proved adenosis tumor in a 31-year-old woman. Mammogram showed a lobulated, well-circumscribed mass with several surrounding radiolucent halos. In the center of the mass several linear radiolucent densities were seen with the appearance of a conglomerated well-circumscribed mass such as fibroadenoma. These linear radiolucent densities were consistent with the fat between the fibrous sclerosis in pathologic specimen. Ultrasonogram showed a well-circumscribed mass with homogeneous low echogenicity, partial posterior enhancement, and bilateral acoustic shadowings.

Matrix Transformation in Boron Containing High-Temperature Co-Re-Cr Alloys

Science.gov (United States)

Strunz, Pavel; Mukherji, Debashis; Beran, Přemysl; Gilles, Ralph; Karge, Lukas; Hofmann, Michael; Hoelzel, Markus; Rösler, Joachim; Farkas, Gergely

2018-03-01

An addition of boron largely increases the ductility in polycrystalline high-temperature Co-Re alloys. Therefore, the effect of boron on the alloy structural characteristics is of high importance for the stability of the matrix at operational temperatures. Volume fractions of ɛ (hexagonal close-packed—hcp), γ (face-centered cubic—fcc) and σ (Cr2Re3 type) phases were measured at ambient and high temperatures (up to 1500 °C) for a boron-containing Co-17Re-23Cr alloy using neutron diffraction. The matrix phase undergoes an allotropic transformation from ɛ to γ structure at high temperatures, similar to pure cobalt and to the previously investigated, more complex Co-17Re-23Cr-1.2Ta-2.6C alloy. It was determined in this study that the transformation temperature depends on the boron content (0-1000 wt. ppm). Nevertheless, the transformation temperature did not change monotonically with the increase in the boron content but reached a minimum at approximately 200 ppm of boron. A probable reason is the interplay between the amount of boron in the matrix and the amount of σ phase, which binds hcp-stabilizing elements (Cr and Re). Moreover, borides were identified in alloys with high boron content.

Synthesis, crystal structure, and magnetic properties of novel 2D kagome materials RE{sub 3}Sb{sub 3}Mg{sub 2}O{sub 14} (RE = La, Pr, Sm, Eu, Tb, Ho): Comparison to RE{sub 3}Sb{sub 3}Zn{sub 2}O{sub 14} family

Energy Technology Data Exchange (ETDEWEB)

Sanders, M.B.; Baroudi, K.M.; Krizan, J.W.; Mukadam, O.A.; Cava, R.J. [Department of Chemistry, Princeton University, Princeton, NJ (United States)

2016-10-15

The crystal structures and magnetic properties of RE{sub 3}Sb{sub 3}Mg{sub 2}O{sub 14} (RE = La, Pr, Sm, Eu, Tb, Ho) with a perfect kagome lattice are presented and compared to RE{sub 3}Sb{sub 3}Zn{sub 2}O{sub 14}. Rietveld structure refinements were performed using X-ray diffraction data, indicating that the layered compounds are fully structurally ordered. The compounds crystallize in a rhombohedral supercell of the cubic pyrochlore structure, in the space group R-3m. Magnetic susceptibility measurements show no signs of magnetic ordering above 2 K. The RE{sub 3}Sb{sub 3}Mg{sub 2}O{sub 14} family is similar to that of RE{sub 3}Sb{sub 3}Zn{sub 2}O{sub 14}; however, the series reported here features a fully ordered distribution of cations in both the nonmagnetic antimony and magnetic rare earth kagome lattices. Unlike the offsite disorder that Zn{sup 2+} experiences in RE{sub 3}Sb{sub 3}Zn{sub 2}O{sub 14}, the magnesium sites in RE{sub 3}Sb{sub 3}Mg{sub 2}O{sub 14} are completely ordered. Here we compare the magnetic properties in both series of kagome compounds to determine how significant Zn{sup 2+}'s positional ordering is within this structure type. The compounds reported here appear to be relatively defect-free and are therefore model systems for investigating magnetic frustration on an ideal 2D rare earth kagome lattice. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Kan retsvidenskaben være empirisk?

DEFF Research Database (Denmark)

Holtermann, Jakob von Holderstein; Christensen, Mikkel Jarle; Madsen, Mikael Rask

2013-01-01

Med udgangspunkt i Alf Ross’ retsrealistiske projekt beskæftiger denne artikel sig med, om retsvidenskaben er en disciplin i sin egen ret, eller om den i sidste ende er en del af samfundsvidenskaben særligt sociologien. Konkret undersøges dette skisma hos Ross gennem hans kritik af Theodor Geigers...... retssociologiske arbejder, hvor Ross imod Geiger argumenterer for, at retsvidenskaben uanset ambitionen om at blive empirisk stadig må være principielt forskellig fra retssociologien. I artiklen argumenteres der for, at denne påstand er uholdbar, og at den bl.a. hviler på en vilkårlig afgrænsning af sociologien......, både hvad angår dens metode og dens genstand. Artiklens konklusioner har samtidig betydning for, hvilke udviklingslinjer man vælger at tegne fra Ross’ egen realistiske retslære i midten af forrige århundrede og frem imod vore dages iøjnefaldende empiriske vending i retsvidenskaben kendetegnet ved...

Active school of Adolphe Ferrière

Directory of Open Access Journals (Sweden)

Kocić Ljubomir P.

2004-01-01

Full Text Available The paper presents views of Adolphe Ferrière, a Swiss educator and psychologist and a Professor at the "Jean-Jacques Rousseau" Institute, about active school - one of the "new school" movements that emerged in the first half of 20th century as a countermove to traditional school founded on Herbartian conception of education. Condemning old school’s intellectualism and verbalism, active school turns towards a child, his nature, needs and interests, and declares activity, "child’s self-work", the basic principle of education. The paper points out Ferrière’s contributions to the transformation of "learning school" into "working and activity school". After presenting Ferrière’s criticism of traditional school as well as a number of "new school" movements, the author provides in more detail essential features of active school. Ferrière’s argumentation against attempts to identify active school with "handwork school" and against tendencies to make it equal with "active methods" is herein presented. Also, the author elaborates why Ferrière turns down the objection that active school neglects intellectual education and why he does not accept pragmatic qualifications of active school. Consideration is given to the demands of active school for teacher education i.e. characteristics that a "new school" teacher should possess as required by Ferrière.

[μ-Bis(diphenylphosphanyl-κPmethane]decacarbonyltri-μ-hydrido-trirhenium(I(3 Re—Re dichloromethane solvate

Directory of Open Access Journals (Sweden)

Ahmed F. Abdel-Magied

2011-12-01

Full Text Available In the title compound, [Re3(μ-H3(C25H22P2(CO10]·CH2Cl2, the three Re atoms form a triangle bearing ten terminal carbonyl groups and three edge-bridging hydrides. The bis(diphenylphosphanylmethane ligand bridges two Re atoms. Neglecting the Re—Re interactions, each Re atom is in a slightly distorted octahedral coordination environment. The dichloromethane solvent molecule is disordered over two sets of sites with fixed occupancies of 0.6 and 0.4.

Conceivability and De Re Modal Knowledge: A reply to Roca-Royes

DEFF Research Database (Denmark)

Steffensen, Asger Bo Skjerning

In a recent paper, Roca-Royes argues that conceivability cannot be the whole story about our access to de re modal knowledge. Her claim is that conceivability-based epistemologies fails to comply with a principle any epistemology of de re modality must observe. I critically assess Roca...

A study on the electronic and interfacial structures of monolayer ReS2-metal contacts.

Science.gov (United States)

Wang, Jin; Yang, Guofeng; Sun, Rui; Yan, Pengfei; Lu, Yanan; Xue, Junjun; Chen, Guoqing

2017-10-11

In this paper, we perform a systematic and rigorous study to evaluate the Ohmic nature of the top-contact formed by the monolayer ReS 2 (mReS 2 ) and metals (gold, silver, platinum, nickel, titanium, and scandium) by means of first-principles density functional theory calculations. We investigate the potential barrier, charge transfer and atomic orbital overlap at the mReS 2 -metal interface in consideration of van der Waals forces to understand how efficiently carriers could be injected from the metal contact to the mReS 2 channel. ReS 2 is physisorbed on Au and Ag, which leads to little perturbation of its electronic structures and forms a larger Schottky contact and a higher tunnel barrier at the interface. ReS 2 is chemisorbed on Ti and Sc, where the bonding strongly perturbs the electronic structures and is found to be purely Ohmic. The bonding of ReS 2 on Pt and Ni lies between these two extreme cases, demonstrating an intermediate behavior. These findings not only provide an insight into the mReS 2 -metal interfaces but may also prove to be instrumental in the future design of ReS 2 -based devices with good performance.

A study on the re-identifiability of Dutch citizens

OpenAIRE

Koot, M.R.; van 't Noordende, G.; de Laat, C.; Serjantov, A.; Troncoso, C.

2010-01-01

This paper analyses the re-identifiability of Dutch citizens by various demographics. Our analysis is based on registry office data of 2.7 million Dutch citizens, ~16% of the total population. We provide overall statistics on re-identifiability for a range of quasi-identifiers, and present an in-depth analysis of quasi-identifiers found in two de-identified data sets. We found that 67.0% of the sampled population is unambiguously identifiable by date of birth and four-digit postal code alone,...

IDC Re-Engineering Phase 2 Architecture Document.

Energy Technology Data Exchange (ETDEWEB)

Burns, John F.

2015-12-01

This document contains a description of the system architecture for the IDC Re-Engineering Phase 2 project. This is a draft version that primarily provides background information for understanding delivered Use Case Realizations.

Making research data repositories visible: the re3data.org Registry.

Directory of Open Access Journals (Sweden)

Heinz Pampel

Full Text Available Researchers require infrastructures that ensure a maximum of accessibility, stability and reliability to facilitate working with and sharing of research data. Such infrastructures are being increasingly summarized under the term Research Data Repositories (RDR. The project re3data.org-Registry of Research Data Repositories-has begun to index research data repositories in 2012 and offers researchers, funding organizations, libraries and publishers an overview of the heterogeneous research data repository landscape. In July 2013 re3data.org lists 400 research data repositories and counting. 288 of these are described in detail using the re3data.org vocabulary. Information icons help researchers to easily identify an adequate repository for the storage and reuse of their data. This article describes the heterogeneous RDR landscape and presents a typology of institutional, disciplinary, multidisciplinary and project-specific RDR. Further the article outlines the features of re3data.org, and shows how this registry helps to identify appropriate repositories for storage and search of research data.

First principles electronic and thermal properties of some AlRE intermetallics

Science.gov (United States)

Srivastava, Vipul; Sanyal, Sankar P.; Rajagopalan, M.

2008-10-01

A study on structural and electronic properties of non-magnetic cubic B 2-type AlRE (RE=Sc, Y, La, Ce, Pr and Lu) intermetallics has been done theoretically. The self-consistent tight binding linear muffin tin orbital method is used to describe the electronic properties of these intermetallics at ambient and at high pressure. These compounds show metallic behavior under ambient conditions. The variation of density of states under compression indicates some possibility of structural phase transformation in AlLa, AlCe and AlPr. Thermal properties like Debye temperature and Grüneisen constant are calculated at T=0 K and at ambient pressure within the Debye-Grüneisen model and compared with the others’ theoretical results. Our results are in good agreement. We have also performed a pressure-induced variation of Debye temperature and have found a decrease in Debye temperature around 40 kbar in AlRE (RE=La, Ce, Pr) intermetallics.

First principles electronic and thermal properties of some AlRE intermetallics

Energy Technology Data Exchange (ETDEWEB)

Srivastava, Vipul [Department of Physics, Barkatullah University, Hoshangabad Road, Bhopal, Madhya Pradesh 462 026 (India)], E-mail: vips73@yahoo.com; Sanyal, Sankar P. [Department of Physics, Barkatullah University, Hoshangabad Road, Bhopal, Madhya Pradesh 462 026 (India); Rajagopalan, M. [Department of Physics, Anna University, Chennai-600 025 (India)

2008-10-01

A study on structural and electronic properties of non-magnetic cubic B{sub 2}-type AlRE (RE=Sc, Y, La, Ce, Pr and Lu) intermetallics has been done theoretically. The self-consistent tight binding linear muffin tin orbital method is used to describe the electronic properties of these intermetallics at ambient and at high pressure. These compounds show metallic behavior under ambient conditions. The variation of density of states under compression indicates some possibility of structural phase transformation in AlLa, AlCe and AlPr. Thermal properties like Debye temperature and Grueneisen constant are calculated at T=0 K and at ambient pressure within the Debye-Grueneisen model and compared with the others' theoretical results. Our results are in good agreement. We have also performed a pressure-induced variation of Debye temperature and have found a decrease in Debye temperature around 40 kbar in AlRE (RE=La, Ce, Pr) intermetallics.

First principles electronic and thermal properties of some AlRE intermetallics

International Nuclear Information System (INIS)

Srivastava, Vipul; Sanyal, Sankar P.; Rajagopalan, M.

2008-01-01

A study on structural and electronic properties of non-magnetic cubic B 2 -type AlRE (RE=Sc, Y, La, Ce, Pr and Lu) intermetallics has been done theoretically. The self-consistent tight binding linear muffin tin orbital method is used to describe the electronic properties of these intermetallics at ambient and at high pressure. These compounds show metallic behavior under ambient conditions. The variation of density of states under compression indicates some possibility of structural phase transformation in AlLa, AlCe and AlPr. Thermal properties like Debye temperature and Grueneisen constant are calculated at T=0 K and at ambient pressure within the Debye-Grueneisen model and compared with the others' theoretical results. Our results are in good agreement. We have also performed a pressure-induced variation of Debye temperature and have found a decrease in Debye temperature around 40 kbar in AlRE (RE=La, Ce, Pr) intermetallics

Making research data repositories visible: the re3data.org Registry.

Science.gov (United States)

Pampel, Heinz; Vierkant, Paul; Scholze, Frank; Bertelmann, Roland; Kindling, Maxi; Klump, Jens; Goebelbecker, Hans-Jürgen; Gundlach, Jens; Schirmbacher, Peter; Dierolf, Uwe

2013-01-01

Researchers require infrastructures that ensure a maximum of accessibility, stability and reliability to facilitate working with and sharing of research data. Such infrastructures are being increasingly summarized under the term Research Data Repositories (RDR). The project re3data.org-Registry of Research Data Repositories-has begun to index research data repositories in 2012 and offers researchers, funding organizations, libraries and publishers an overview of the heterogeneous research data repository landscape. In July 2013 re3data.org lists 400 research data repositories and counting. 288 of these are described in detail using the re3data.org vocabulary. Information icons help researchers to easily identify an adequate repository for the storage and reuse of their data. This article describes the heterogeneous RDR landscape and presents a typology of institutional, disciplinary, multidisciplinary and project-specific RDR. Further the article outlines the features of re3data.org, and shows how this registry helps to identify appropriate repositories for storage and search of research data.

Room temperature synthesis of ReS2 through aqueous perrhenate sulfidation.

Science.gov (United States)

Borowiec, Joanna; Gillin, William P; Willis, Maureen; Boi, Filippo; He, Yi; Wen, Jiqiu; Wang, Shanling; Schulz, Leander

2017-12-29

In this study, a direct sulfidation reaction of ammonium perrhenate (NH₄ReO₄) leading to a synthesis of rhenium disulfide (ReS₂) is demonstrated. These finding reveal the first example of a simplistic bottom-up approach to the chemical synthesis of crystalline ReS₂. The reaction presented here takes place at room temperature, in an ambient and solvent-free environment and without the necessity of a catalyst. The atomic composition and structure of the as-synthesized product were characterized using several analysis techniques including energy dispersive X-ray (EDX) spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), transmission electron microscopy (TEM), Raman spectroscopy, thermogravimetric analysis (TGA) and differential scannig calorimetry (DSC). The results indicated the formation of a lower symmetry (1T_d) ReS₂ with a low degree of layer stacking. © 2017 IOP Publishing Ltd.

The use and re-use of unsustainably mined groundwater: A global budget

Science.gov (United States)

Grogan, D. S.; Prousevitch, A.; Wisser, D.; Lammers, R. B.; Frolking, S. E.

2015-12-01

Many of the world's major groundwater aquifers are rapidly depleting due to unsustainable groundwater pumping, while demand for food production - and therefore demand for irrigation water ­- is increasing. While it is likely that groundwater users will be impacted by the future's inevitable reduction in groundwater availability, there is a major gap in our understanding of potential impacts downstream of pumping sites. Due to inefficiencies in irrigation systems, significant amounts of abstracted groundwater become runoff, entering surface waters and flowing downstream to be re-abstracted and used again. In this study, we use a gridded water balance model to calculate the amount of unsustainably pumped groundwater that enters surface water systems by way of irrigation runoff, and quantify the additional irrigation water supplied by the re-use of this water. We assess the global budget of unsustainable groundwater sources and sinks, including downstream re-use, groundwater recharge, and flow to the oceans. Globally, we find that 80% of unsustainable groundwater is re-abstracted for irrigation either downstream or locally from groundwater recharge. This re-abstracted water contributes the water equivalent needed to irrigate 200,000 km2 of cropland globally. Including irrigation runoff reuse in an assessment of irrigation efficiency, we see that the traditional concept of irrigation efficiency (net irrigation/gross irrigation) significantly overestimates water "waste". We define a basin efficiency for unsustainable groundwater use that includes re-use, and see that while global irrigation efficiency is often estimated at 50%, global average unsustainable water use efficiency is > 60%. Losing this re-use resource by increasing irrigation efficiency does little to alleviate unsustainable groundwater demands.

Yttrium aluminum garnet (YAG) obtained by rare-earth mixed oxide (RE2O3)

International Nuclear Information System (INIS)

Castro, D.F.; Daguano, J.K.M.F.; Rodrigues Junior, D.; Suzuki, P.A.; Silva, O.M.M.

2010-01-01

In this work, the substitution of commercial Y 2 O 3 by a rare earth mixed oxide, RE 2 O 3 , to form Yttrium aluminum Garnet-Y 3 Al 5 O 12 , was investigated. Al 2 O 3 :Y 2 O 3 and Al 2 O 3 :RE 2 O 3 powder-mixtures, in a molar ratio of 60:40, were milled and subsequently cold uniaxially-pressed. Compacts were sintered at 1000, 1400 or 1600 deg C, for 120 minutes. RE 2 O 3 oxide was characterized by high-resolution synchrotron X-ray diffraction (HRXRD) and compared to Y 2 O 3 . X-ray diffraction pattern of the RE 2 O 3 indicates a true solid solution formation. Rietveld refinement of the sintered YAG and (RE)AG reveled a similar crystal structure to the YAGs obtained by the use of Al 2 O 3 -Y 2 O 3 or Al 2 O 3 -RE 2 O 3 respectively. Microstructural analysis of both, YAG or (RE)AG, revealed similar grain sizes of about 2.5 μm besides mechanical properties, with hardness of 400HV and fracture toughness of 3.8MPa.m1/2. It could be, thus, demonstrated that pure Y 2 O 3 can be substituted by the rare-earth solid solution, RE 2 O 3 , in the formation YAGs, presenting similar microstructural and mechanical properties. (author)

Unilateral re-expansion pulmonary oedema treated with C-PAP

Directory of Open Access Journals (Sweden)

Giovanni Volpicelli

2009-06-01

Full Text Available Unilateral re-expansion pulmonary oedema is a rare but dangerous complication of treatment for pulmonary atelectasis, pleural effusion and pneumothorax, whose pathogenesis is not completely known. The clinical picture varies considerably from asymptomatic forms with positive radiographic findings to forms with severe respiratory insufficiency and haemodynamic instability. Little data is available in literature on the treatment of re-expansion pulmonary oedema with non-invasive continuous positive airway pressure ventilation. In this article, we describe the case of a 75 year-old man who reported to our Emergency Department with extensive spontaneous left pneumothorax. Following placement of the transthoracic drain, the patient presented a clinical picture of severe respiratory insufficiency with circulatory collapse caused by unilateral re-expansion pulmonary oedema. The case was successfully treated with the application of non-invasive continuous positive airway pressure ventilation. The article briefly discusses current knowledge with regard to the aetiological and pathogenetic factors of this complication of emergency pneumothorax treatment.

Re-dispersion of alumina particles in water: influence of the surface state

International Nuclear Information System (INIS)

Desset, Sabine

1999-01-01

The aim of this work was to determine the mechanisms by which suspensions of alpha alumina particles may be dried and then re-dispersed spontaneously in water. To get reproducible results, we designed appropriate protocols: (i) for preparing the surface state, and for generating controlled interparticle contacts (presence of water or complexing agents); (ii) for measuring the amount of re-dispersed material with a proper averaging over all interparticle bonds (turbidity). These results show that there are thresholds, determined by the conditions of drying and re-dispersion, where all the powder goes from the aggregated state to the dispersed state. With hydrated powders, it was found that mild changes in the chemical conditions (pH) and application of very weak mechanical forces (sedimentation) were enough to cause significant change in re-dispersion. According to these thresholds, a re-dispersion mechanism could be identified. Re-dispersion is ruled, indeed, by a balance of forces and the displacement of the re-dispersion thresholds indicates a shift in the balance of forces. These forces are the well known forces that control colloidal stability: van der Waals attraction, electrostatic repulsion and hydration forces. We found that hydration acts as a repulsive wall corresponding to one or two monolayers of water on each surface and depends on the Relative Humidity of drying. We also found that electrostatic repulsions at short separations are much weaker than the predictions based on the Poisson Boltzmann equation, but should be modelled according to the triple layer model. Repulsions to be considered are those calculated with the screened charges of the particles. Another aim of this work was to facilitate re-dispersion by using complexing agents that bind to the surfaces and add a steric repulsion We have found that molecules with carboxylic and hydroxyl groups can be efficient in this respect, if they are bound to surfaces before aggregation, if they are not

Re-dispersion of alumina particles in water: influence of the surface state

International Nuclear Information System (INIS)

Desset, Sabine

1999-01-01

The aim of this work was to determine the mechanisms by which suspensions of alpha alumina particles may be dried and then re-dispersed spontaneously in water. To get reproducible results, we designed appropriate protocols: (i) for preparing the surface state, and for generating controlled interparticle contacts (presence of water or complexing agents); (ii) for measuring the amount of re-dispersed material with a proper averaging over all interparticle bonds (turbidity). These results show that there are thresholds, determined by the conditions of drying and re-dispersion, where all the powder goes from the aggregated state to the dispersed state. With hydrated powders, it was found that mild changes in the chemical conditions (pH) and application of very weak mechanical forces (sedimentation) were enough to cause significant change in re-dispersion. According to these thresholds, a re-dispersion mechanism could be identified. Re-dispersion is ruled, indeed, by a balance of forces and the displacement of the re-dispersion thresholds indicates a shift in the balance of forces. These forces are the well-known forces that control colloidal stability: van der Waals attraction, electrostatic repulsion and hydration forces. We found that hydration acts as a repulsive wall corresponding to one or two monolayers of water on each surface and depends on the Relative Humidity of drying. We also found that electrostatic repulsions at short separations are much weaker than the predictions based on the Poisson Boltzmann equation, but should be modelled according to the triple layer model. Repulsions to be considered are those calculated with the screened charges of the particles. Another aim of this work was to facilitate re-dispersion by using complexing agents that bind to the surfaces and add a steric repulsion We have found that molecules with carboxylic and hydroxyl groups can be efficient in this respect, if they are bound to surfaces before aggregation, if they are not

Animal Bodies, Colonial Subjects: (ReLocating Animality in Decolonial Thought

Directory of Open Access Journals (Sweden)

Billy-Ray Belcourt

2014-12-01

Full Text Available In this paper, I argue that animal domestication, speciesism, and other modern human-animal interactions in North America are possible because of and through the erasure of Indigenous bodies and the emptying of Indigenous lands for settler-colonial expansion. That is, we cannot address animal oppression or talk about animal liberation without naming and subsequently dismantling settler colonialism and white supremacy as political machinations that require the simultaneous exploitation and/or erasure of animal and Indigenous bodies. I begin by re-framing animality as a politics of space to suggest that animal bodies are made intelligible in the settler imagination on stolen, colonized, and re-settled Indigenous lands. Thinking through Andrea Smith’s logics of white supremacy, I then re-center anthropocentrism as a racialized and speciesist site of settler coloniality to re-orient decolonial thought toward animality. To critique the ways in which Indigenous bodies and epistemologies are at stake in neoliberal re-figurings of animals as settler citizens, I reject the colonial politics of recognition developed in Sue Donaldson and Will Kymlicka’s recent monograph, Zoopolis: A Political Theory of Animal Rights (Oxford University Press 2011 because it militarizes settler-colonial infrastructures of subjecthood and governmentality. I then propose a decolonized animal ethic that finds legitimacy in Indigenous cosmologies to argue that decolonization can only be reified through a totalizing disruption of those power apparatuses (i.e., settler colonialism, anthropocentrism, white supremacy, and neoliberal pluralism that lend the settler state sovereignty, normalcy, and futurity insofar as animality is a settler-colonial particularity.

Vers la structuration d’une filière aurifère « durable » ? Etude du cas de la Guyane française

Directory of Open Access Journals (Sweden)

Jessica Oder

2011-09-01

Full Text Available L’objectif de cet article est de se demander si la filière aurifère légale en Guyane française peut servir les objectifs du développement durable. En effet, cette filière est en proie à des difficultés : alors que les cours de l’or sont en constante augmentation, le nombre d’opérateurs miniers diminue constamment, depuis près de sept ans. Ce paradoxe aurifère guyanais trouve ses origines dans la volonté étatique française d'organiser la filière et d'en faire un exemple en matière de « durabilité », volonté clairement exprimée à la suite du Grenelle de l’Environnement. Principalement élaboré à partir d’entretiens semi-directifs et d’archives, l’article a notamment cherché à analyser les principaux éléments de cette structuration, le schéma départemental d’orientation minière (SDOM, en cours d’adoption, et plusieurs initiatives destinées à améliorer les pratiques des opérateurs miniers qui sont majoritairement des artisans. Toutefois, cette évolution révèle des antagonismes entre les parties prenantes (collectivités territoriales, services de l'État, opérateurs miniers et environnementalistes. Ces derniers ont fait surface lors de l’affaire du Camp Caïman, impliquant la multinationale Iamgold, et pendant le processus d’élaboration du SDOM lui-même. Des problématiques connexes telles que les revendications locales de gestion de la ressource aurifère, mais aussi et surtout l’orpaillage illégal, dressent des perspectives d’avenir plutôt incertaines pour la filière aurifère.The aim of this article is to wonder whether the gold mining sector, in French Guiana, can be in line with the objectives of sustainable development. Actually, this sector is in the grip of difficulties: whereas gold rates are in constant increase, the number of mining operators drops constantly, since nearly seven years. This Guianese paradox originates in the will of the French State to make gold

A study of re-tear cases after ARCR

International Nuclear Information System (INIS)

Ishida, Yasuyuki; Chosa, Etsuo; Yano, Hiroaki

2011-01-01

Recently, good clinical outcomes of arthroscopic rotator cuff repair (ARCR) are reported, but the re-tear rate of massive and large rotator cuff tears is still high. The purpose of this study is to review the clinical outcome and postoperative cuff integrity of ARCR in our hospital. We evaluated 80 shoulders (61 males, 19 females), whose age rauged from 30 to 78 (average: 61.8 years old). The size of tears were 8 small, 22 medium, 36 large, and 14 massive. We evaluated the pre-and postoperative Japanese Orthopedic Association (JOA) scored, and MRI findings 12 months postoperatively. We evaluated the cuff integrity and fatty degeneration of the ruptured cuff by Goutallier's classification. Postoperative MRI findings showed complete repair in 56 shoulders (70%) and re-tear in 24 shoulders (30%). Postoperative JOA score was poor in cases with large re-tears. Retear rates were high in large and massive tears, tears with advanced fatty degeneration, and subscapularis tears. As this operation is not a replacement procedure, the quality of the ruptured rotator cuff is important. Further discussion on the operative indication and method is necessary. (author)

RE{sub 3}Ga{sub 9}Ge (RE=Y, Ce, Sm, Gd and Yb): compounds with an open three-dimensional polygallide framework synthesized from liquid gallium

Energy Technology Data Exchange (ETDEWEB)

Zhuravleva, M A; Kanatzidis, M G

2003-07-01

The RE{sub 3}Ga{sub 9}Ge compounds (RE=Y, Ce, Sm, Gd and Yb) were synthesized at 850 deg. C in quantitative yield from reactions containing excess liquid Ga. The orthorhombic crystal structure is characterized by a unique three-dimensional open Ga framework with parallel straight tunnels. In the tunnels, inserted are arrays of the RE atoms together with interpenetrated monoatomic RE-Ga-Ge planes. A complex disordered arrangement of the RE and Ga atoms is observed in the monoatomic plane. Depending on the extent of disorder, the crystal structure could be presented either in a sub-cell (no ordering) or in a super-cell (partial ordering). Single-crystal X-ray data for Ce{sub 3}Ga{sub 9}Ge sub-structure: space group Immm, Z=2, cell parameters a=4.3400(12) A; b=10.836(3) A; and c=11.545(3) A; super-structure: space group Cmma, Z=8, cell parameters a=8.680(3) A; b=23.090(7) A; and c=10.836(3) A. The refinement based on the full-matrix least squares on F{sub o}{sup 2}[I>2{sigma}(I)] converged to final residuals R{sub 1}/wR{sub 2}=0.0226/0.0528 and 0.0729/0.1569 for the sub- and super-structures, respectively. The relationship between the disordered sub-structure and partially ordered super-structure is discussed. Magnetic susceptibility measurements show Curie-Weiss behavior at the temperatures above 30 K with the negative Weiss constants {theta}=-49(1) and-7.7 K for Gd and Ce analogs, respectively. An antiferromagnetic transition is observed in the Gd analog at T{sub N}=26.1 K. The {mu}{sub eff} obtained for both analogs is close to the RE{sup 3+} free-ion value.

Re-Irradiation of Hepatocellular Carcinoma: Clinical Applicability of Deformable Image Registration.

Science.gov (United States)

Lee, Dong Soo; Woo, Joong Yeol; Kim, Jun Won; Seong, Jinsil

2016-01-01

This study aimed to evaluate whether the deformable image registration (DIR) method is clinically applicable to the safe delivery of re-irradiation in hepatocellular carcinoma (HCC). Between August 2010 and March 2012, 12 eligible HCC patients received re-irradiation using helical tomotherapy. The median total prescribed radiation doses at first irradiation and re-irradiation were 50 Gy (range, 36-60 Gy) and 50 Gy (range, 36-58.42 Gy), respectively. Most re-irradiation therapies (11 of 12) were administered to previously irradiated or marginal areas. Dose summation results were reproduced using DIR by rigid and deformable registration methods, and doses of organs-at-risk (OARs) were evaluated. Treatment outcomes were also assessed. Thirty-six dose summation indices were obtained for three OARs (bowel, duodenum, and stomach doses in each patient). There was no statistical difference between the two different types of DIR methods (rigid and deformable) in terms of calculated summation ΣD (0.1 cc, 1 cc, 2 cc, and max) in each OAR. The median total mean remaining liver doses (M(RLD)) in rigid- and deformable-type registration were not statistically different for all cohorts (p=0.248), although a large difference in M(RLD) was observed when there was a significant difference in spatial liver volume change between radiation intervals. One duodenal ulcer perforation developed 20 months after re-irradiation. Although current dose summation algorithms and uncertainties do not warrant accurate dosimetric results, OARs-based DIR dose summation can be usefully utilized in the re-irradiation of HCC. Appropriate cohort selection, watchful interpretation, and selective use of DIR methods are crucial to enhance the radio-therapeutic ratio.