bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pre-operative parathyroid localisation: surgical review of sesta-methoxyisobutylisonitrile images is important
Authors: Awobem A A , England R J A 
Published: December 2009

AbstractObjective:To highlight the importance of pre-operative review of sesta-methoxyisobutylisonitrile imaging before parathyroid surgery.Case report:Technetium-99 m sesta-methoxyisobutylisonitrile scanning is a well established imaging modality undertaken to locate the parathyroid glands prior to parathyroidectomy. Because of the relative lack of detail in the images obtained, the radiological report is normally the most important piece of information used by the surgeon for surgical planning. We report a case that illustrates the importance of surgical image review prior to revision parathyroid surgery. We also present a review of literature highlighting the need for surgical review of such imaging.Conclusion:We propose that surgeons routinely review sesta-methoxyisobutylisonitrile images pre-operatively.
Unilateral combined laryngocoele with recurrent respiratory papillomatosis: case report
Authors: Bayan S , Mortensen M 
Published: December 2009

AbstractObjective:We report a case of unilateral combined laryngocoele occurring in conjunction with recurrent respiratory papillomatosis.Methods:Case report and review of the literature concerning the physiology underlying laryngocoele formation.Results:A laryngocoele is an abnormal, air-filled dilation of the laryngeal saccule which communicates with the laryngeal lumen. We report a case of a 53-year-old man with a unilateral combined laryngocoele occurring in conjunction with recurrent respiratory papillomatosis. Microlaryngoscopy demonstrated a papilloma obstructing the laryngeal saccule. Removal of papillomata via laser excision and marsupialisation of the left laryngocoele improved the patient's vocal symptoms. There was no recurrence of papillomata or the laryngocoele.Conclusion:While many laryngocoeles can be explained by altered laryngeal physiology, the papilloma described in this case acted as an anatomical obstruction that trapped air within the saccule, creating an environment conducive to laryngocoele formation.
Aggressive angiomyxoma of larynx: case report and literature review
Authors: Sylvester D C , Kortequee S , Moor J W , Woodhead C J , Maclennan K A 
Published: December 2009

AbstractObjective:We report the second known case of aggressive angiomyxoma of the larynx.Method:Case report and a review of the world literature concerning angiomyxoma of the larynx and recent advances in the immunohistochemical, cytogenic and clinical study of its female pelvic counterpart.Results:Aggressive angiomyxoma is a rare mesenchymal tumour originally thought only to occur in the female pelvis and peritoneum, or rarely in the male genital tract. A 47-year-old man presented with a one-month history of dysphonia. He was found to have a supraglottic mass on endoscopic examination, and underwent a laryngofissure approach excision biopsy and covering tracheostomy. Histological analysis showed a characteristic proliferation of spindle cells widely separated by loose, myxoid stroma with a prominent vascular component. Aggressive angiomyxoma was diagnosed.Conclusion:To our knowledge, this is the second report in the world literature of aggressive angiomyxoma of the larynx. Comparison with the female pelvic counterpart facilitates diagnosis, aided by recent advances, and suggests that complete surgical excision with a wide margin is the treatment of choice.
Notes on the sea caves of sub-Antarctic Macquarie Island, Southern Ocean
Authors: Harris Stephen , Copson Geof , d'Arville Louisa 
Published: December 2009

ABSTRACTCaves of marine origin occur in tectonically uplifted stacks on the coastal terrace and in plateau edge cliffs at a number of locations around Macquarie Island. Some of the caves have been located and their distributions mapped. Four of the best known caves are mapped in detail. Aspects of their geology, structure and biology, including speleothem development, clastic deposits, faunal remains and subfossil deposits are explored. Many of these caves contain deposits, which may have the potential to be investigated, as beach and peat deposits have been, for dating key time periods in the island's evolution. The palaeoenvironmental research potential of the sea caves on Macquarie Island has yet to be exploited. Further knowledge about these caves will assist in the understanding of the processes that have acted on Macquarie Island and other polar and sub-polar islands.
Retracing the route of Hans K. E. Krüger's 1930 German Arctic expedition
Authors: Stenton Douglas R. , Park Robert W. , Grant Tara 
Published: December 2009

ABSTRACTPrior to the discovery in 1999 of an archaeological site near Cape Southwest, on southern Axel Heiberg Island, little was known about the movements of the ill fated 1930 German Arctic Expedition, led by Hans K.E. Krüger. What was known was based on the content of three cairn documents that spanned a period of just thirteen days. This paper presents new information that expands our knowledge of the expedition's route using catalogue labels found with geological specimens collected by Krüger and recovered from the site. The movements of the expedition over a period of 43 days are reconstructed, ten additions are made to the known itinerary, and an approximate date of the group's arrival at Cape Southwest is presented. The data show that despite concerns about the health of both Krüger and his Danish assistant, and about the weight of equipment being transported, the expedition had made good progress prior to reaching Cape Southwest.
Monitoring the transformation of historic features in Antarctica and Svalbard: local processes and regional contexts
Authors: Roura Ricardo 
Published: December 2009

ABSTRACTHistorical sites in Antarctica and Svalbard contain the material remains of past activities of exploration and exploitation of these regions. These sites have been subject to transformation by cultural and non-cultural (natural) processes since their abandonment to the present. For research and management purposes it is important to monitor and explain these changes. This article focuses on the transformation of historic features in Antarctica and Svalbard as assessed through repeat photography. Seven historical features were selected representing a range of site types and past and present site functions. Data collection was based on the opportunistic reproduction of photographs of historic features taken up to 20+ years previously. Data analysis was performed using the concepts of site formation processes developed by M.B. Schiffer (1983, 1987). Time-serial changes were observed in the seven photo-couples examined in the present instance. No feature degraded significantly during the monitoring period; rather, several features were restored in different ways. Changes were interpreted to result from a range of cultural processes (including conservation, research, and tourism) and natural processes (mainly wind action). Local changes take place in the context of broader regional developments in Antarctica and Svalbard. Despite the ‘time capsule’ narratives about some sites, historical sites in the polar regions are dynamic entities that not only reflect the past as it once was but are also a window onto the present.
Spatial resolution, contrast sensitivity, and sensitivity to defocus of chicken retinal ganglion cells in vitro
Authors: DIEDRICH ERICH , SCHAEFFEL FRANK 
Published: December 2009

AbstractThe chicken has been extensively studied as an animal model for myopia because its eye growth is tightly controlled by visual experience. It has been found that the retina controls the axial eye growth rates depending on the amount and the sign of defocus imposed in the projected image. Glucagonergic amacrine cells were discovered that appear to encode for the sign of imposed defocus. It is not clear whether the downstream neurons, the retinal ganglion cells, still have access to this information—and whether it ultimately reaches the brain. We have analyzed the spike rates of chicken retinal ganglion cells in vitro using a microelectrode array. For this purpose, we initially defined spatial resolution and contrast sensitivity in vitro. Two classes of chicken retinal ganglions were found, depending on the linearity of their responses with increasing contrast. Responses generally declined with increasing defocus of the visual stimulus. These responses were well predicted by the modulation transfer function for a diffraction-limited defocused optical system, the first Bessel function. Thus, the studied retinal ganglion cells did not distinguish between a loss of contrast at a given spatial frequency due to reduced contrast of the stimulus pattern or because the pattern was presented out of focus. Furthermore, there was no indication that the retinal ganglion cells responded differently to defocus of either sign, at least for the cells that were recorded in this study.
Process discovery and Petri nets
Authors: BUSI NADIA , PINNA G. MICHELE 
Published: December 2009

The aim of the research domain known as process mining is to use process discovery to construct a process model as an abstract representation of event logs. The goal is to build a model (in terms of a Petri net) that can reproduce the logs under consideration, and does not allow different behaviours compared with those shown in the logs. In particular, process mining aims to verify the accuracy of the model design (represented as a Petri net), basically checking whether the same net can be rediscovered. However, the main mining methods proposed in the literature have some drawbacks: the classical α-algorithm is unable to rediscover various nets, while the region-based approach, which can mine them correctly, is too complex.In this paper, we compare different approaches and propose some ideas to counter the weaknesses of the region-based approach.
On the expressive power of recursion, replication and iteration in process calculi
Authors: BUSI NADIA , GABBRIELLI MAURIZIO , ZAVATTARO GIANLUIGI 
Published: December 2009

In this paper we investigate the expressive power of three alternative approaches to the definition of infinite behaviours in process calculi, namely, recursive definitions, replication and iteration. We prove several results discriminating between the calculi obtained from a core CCS by adding the three mechanisms mentioned above. These results are derived by considering the decidability of four basic properties: termination (that is, all computations are finite); convergence (that is, the existence of a finite computation); barb (that is, the ability to perform an action on a given channel) and weak bisimulation.Our results, which are summarised in Table 1, show that the three calculi form a strict expressiveness hierarchy in that: all the properties mentioned are undecidable in CCS with recursion; only termination and barb are decidable in CCS with replication; all the properties are decidable in CCS with iteration.As a corollary, we also obtain a strict expressiveness hierarchy with respect to weak bisimulation, since there exist weak bisimulation preserving encodings of iteration in replication and of replication in recursion, whereas there are no weak bisimulation preserving encodings in the other directions.
Mobile Petri nets
Authors: ASPERTI A. , BUSI N. 
Published: December 2009

We add mobility to Place-Transition Petri nets: tokens are names for places, and an input token of a transition can be used in its postset to specify a destination. Mobile Petri nets are then further extended to dynamic nets by adding the possibility of creating new nets during the firing of a transition. In this way, starting from Petri nets, we define a simple hierarchy of nets with increasing degrees of dynamicity. For each class in this hierarchy, we provide its encoding in the former class.Our work was largely inspired by the join-calculus of Fournet and Gonthier, which turns out to be a (well-motivated) particular case of dynamic Petri nets. The main difference is that, in the preset of a transition, we allow both non-linear patterns (name unification) and (locally) free names for input places (that is, we remove the locality constraint, and preserve reflexion).
An exploration of cognitive subgroups in Alzheimer’s disease
Authors: DAVIDSON JULIE E. , IRIZARRY MICHAEL C. , BRAY BETHANY C. , WETTEN SALLY , GALWEY NICHOLAS , GIBSON RACHEL , BORRIE MICHAEL , DELISLE RICHARD , FELDMAN HOWARD H. , HSIUNG GING-YUEK , FORNAZZARI LUIS , GAUTHIER SERGE , GUZMAN DANILO , LOY-ENGLISH INGE , KEREN RON , KERTESZ ANDREW , GEORGE-HYSLOP PETER ST. , WHERRETT JOHN , MONSCH ANDREAS U. 
Published: December 2009

AbstractHeterogeneity is observed in the patterns of cognition in Alzheimer’s disease (AD). Such heterogeneity might suggest the involvement of different etiological pathways or different host responses to pathology. A total of 627 subjects with mild/moderate AD underwent cognitive assessment with the Mini-Mental State Examination (MMSE) and the Dementia Rating Scale-2 (DRS-2). Latent class analysis (LCA) was performed on cognition subscale data to identify and characterize cognitive subgroups. Clinical, demographic, and genetic factors were explored for association with class membership. LCA suggested the existence of four subgroups; one group with mild and another with severe global impairment across the cognitive domains, one group with primary impairments in attention and construction, and another group with primary deficits in memory and orientation. Education, disease duration, age, Apolipoprotein E-ε4 (APOE ε4) status, gender, presence of grasp reflex, white matter changes, and early or prominent visuospatial impairment were all associated with class membership. Our results support the existence of heterogeneity in patterns of cognitive impairment in AD. Our observation of classes characterized by predominant deficits in attention/construction and memory respectively deserves further exploration as does the association between membership in the attention/construction class and APOE ε4 negative status. (JINS, 2010, 16, 233–243.)
ERROR ESTIMATES FOR DOMINICI’S HERMITE FUNCTION ASYMPTOTIC FORMULA AND SOME APPLICATIONS
Authors: KERMAN R. , HUANG M. L. , BRANNAN M. 
Published: December 2009

AbstractThe aim of this paper is to find a concrete bound for the error involved when approximating the nth Hermite function (in the oscillating range) by an asymptotic formula due to D. Dominici. This bound is then used to study the accuracy of certain approximations to Hermite expansions and to Fourier transforms. A way of estimating an unknown probability density is proposed.
A VALUATION FORMULA FOR MULTI-ASSET, MULTI-PERIOD BINARIES IN A BLACK–SCHOLES ECONOMY
Authors: SKIPPER MAX , BUCHEN PETER 
Published: December 2009

AbstractWe present a new valuation formula for a generic, multi-period binary option in a multi-asset Black–Scholes economy. The payoff of this so-called M-binary is the most general possible, subject to the condition that a simple analytic expression exists for the present value. Portfolios of M-binaries can be used to statically replicate many European exotics for which there exist closed-form Black–Scholes prices.
UNSTEADY BOUNDARY LAYERS: CONVECTIVE HEAT TRANSFER OVER A VERTICAL FLAT PLATE
Authors: VAN GORDER ROBERT A. , VAJRAVELU K. 
Published: December 2009

AbstractIn this paper, we extend the results in the literature for boundary layer flow over a horizontal plate, by considering the buoyancy force term in the momentum equation. Using a similarity transformation, we transform the partial differential equations of the problem into coupled nonlinear ordinary differential equations. We first analyse several special cases dealing with the properties of the exact and approximate solutions. Then, for the general problem, we construct series solutions for arbitrary values of the physical parameters. Furthermore, we obtain numerical solutions for several sets of values of the parameters. The numerical results thus obtained are presented through graphs and tables and the effects of the physical parameters on the flow and heat transfer characteristics are discussed. The results obtained reveal many interesting behaviours that warrant further study of the equations related to non-Newtonian fluid phenomena, especially the shear-thinning phenomena. Shear thinning reduces the wall shear stress.
Ceres: software for the integrated analysis of transcription factor binding sites and nucleosome positions in Saccharomyces cerevisiae
Authors: Morris Robert T. , O'Connor Timothy R. , Wyrick John J. 
Published: December 2009

Abstract
Motivation: There is accumulating evidence that the chromatin environment of transcription factor (TF) binding sites in promoter regions has a critical influence on their regulatory potential. Recent studies have mapped TF binding sites and nucleosome positions throughout the yeast genome; however, there is a lack of computation tools to integrate these data types.
Results: We have developed the Ceres software to facilitate the integrated analysis of TF binding sites and nucleosome positions in the model eukaryote S.cerevisiae. Ceres enables users to dynamically display the spatial organization of TF binding sites and nucleosome positions of individual genes, or the average profiles for large gene sets. Ceres provides novel statistical tools to test for the enrichment of TF binding sites and chromatin environments for user-selected gene sets. Ceres also enables users to search the genome for combinations of TF binding sites that are associated with specific chromatin environments. Preliminary analysis using the Ceres software indicates that functional and conserved TF binding sites are often associated with specific chromatin environments.
Availability: http://bioinformatics1.smb.wsu.edu/Ceres
Contact: jwyrick@wsu.edu
Supplementary information: Supplementary data are available at Bioinformatics online.
First Report of Damping-Off Caused by Rhizoctonia solani AG-4 on Mediterranean Fan Palm in Italy
Authors: Polizzi G. , Aiello D. , Castello I. , Guarnaccia V. , Vitale A. 
Published: December 2009

Mediterranean fan palm (Chamaerops humilis L.), one of just two autochthonous European palms, is native to the western Mediterranean Region in southwestern Europe and northwestern Africa. It can be found growing wild in the Mediterranean area. In Europe, this species is very popular as an ornamental plant. In March 2009, a widespread damping-off was observed in a stock of approximately 30,000 potted 1-month-old plants of C. humilis cv. Vulcano in a nursery in eastern Sicily. Disease incidence was approximately 20%. Disease symptoms consisted of lesions at the seedling shoot (plumule). Stem lesions were initially orange, turned brown, and followed by death of the entire plumule or eophyll. A fungus with mycelial and morphological characteristics of Rhizoctonia solani Kühn was consistently isolated from lesions when plated on potato dextrose agar (PDA) amended with streptomycin sulfate at 100 μg/ml. Fungal colonies were initially white, turned brown with age, and produced irregularly shaped, brown sclerotia. Mycelium was branched at right angles with a septum near the branch and a slight constriction at the branch base. Hyphal cells removed from cultures grown at 25°C on 2% water agar were determined to be multinucleate when stained with 1% safranin O and 3% KOH solution (1) and examined at ×400. Anastomosis groups were determined by pairing isolates with tester strains AG-1 IA, AG-2-2-1, AG-2-2IIIB, AG-2-2IV, AG-3, AG-4, AG-5, AG-6, and AG-11 on 2% water agar in petri plates (3). Anastomosis was observed only with tester isolates of AG-4, giving both C2 and C3 reactions (2). One representative isolate obtained from symptomatic tissues was deposited at the Fungal Biodiversity Centre, Centraalbureau voor Schimmelcultures (CBS No. 125095). Pathogenicity tests were performed on container-grown, healthy, 1-month-old seedlings. Twenty plants of C. humilis cv. Vulcano were inoculated near the base of the stem with two 1-cm2 PDA plugs from 5-day-old mycelial cultures. The same number of plants served as uninoculated controls. Plants were incubated in a growth chamber and maintained at 25°C and 95% relative humidity on a 12-h fluorescent light/dark regimen. Symptoms identical to those observed in the nursery appeared 5 days after inoculation and all plants died within 20 days. No disease was observed on control plants. A fungus identical in culture morphology to R. solani AG-4 was consistently reisolated from symptomatic tissues, confirming its pathogenicity. To our knowledge, this is the first report in the world of R. solani causing damping-off on Mediterranean fan palm. References: (1) R. J. Bandoni. Mycologia 71:873, 1979. (2) D. E. Carling. Page 37 in: Grouping in Rhizoctonia solani by Hyphal Anastomosis Reactions. Kluwer Academic Publishers, the Netherlands, 1996. (3) C. C. Tu and J. W. Kimbrough. Mycologia 65:941, 1973.
First Report of Phytophthora sansomeana Causing Wilting and Stunting on Corn in Ohio
Authors: Zelaya-Molina L. X. , Ellis M. L. , Berry S. A. , Dorrance A. E. 
Published: December 2009

During the spring of 2004, corn seedlings with symptoms of wilting and stunting were observed in corn fields with emergence problems in Madison and Brown counties, Ohio. Phytophthora isolates were recovered from sections of root tissue of diseased seedlings placed on dilute V8 media amended with pentachloronitrobenzene, iprodione, benlate, neomycin sulfate, and chloramphenicol. Colonies were rosaceous on potato dextrose agar, with a growth rate of 5 mm per day. Homothallic isolates with paragynous antheridia were observed on lima bean agar (LBA); oogonia were 35 to 50 μm in diameter. Sporangia were ovoid to obpyriform, nonpapillate, with an average size of 49 × 30 μm. Pathogenicity was tested on corn seeds using a petri dish assay with 3-day-old cultures on LBA and a sand-cornmeal cup test amended with inoculum from 7-day-old cultures on LBA (1). After 1 week in the petri dish assay, the seeds failed to germinate completely and were covered with white, fungal-like, aerial mycelia and the pathogen was recovered from brown discolored radicle roots. In the cup assay, 2-week-old seedlings developed the same symptoms observed in the field; the pathogen was also isolated from brown discolored roots. In both assays, no symptoms developed in the noninoculated controls. Both pathogenicity tests were repeated two times. Genomic DNA was extracted from mycelia of two isolates and the internal transcribed spacer (ITS) region was amplified and sequenced using ITS6/ITS4 primers (2). Both isolates had identical ITS sequences (GenBank Accession No. GQ853880). A BLAST search of the NCBI database showed 100% homology with the sequence of the haplotype isolate of Phytophthora sansomeana (Accession No. EU925375). P. sansomeana is a new species characterized principally by a large oogonial diameter (37 to 45 μm), rapid growth rate (7 to 10 mm/day), and an ITS sequence falling in Cooke's clade 8 (4). Pathogenicity tests, morphological characteristics, and the ITS sequence analysis indicate that P. samsomena is the causal agent of the symptoms observed on corn seedlings. P. sansomeana has been reported as a pathogen of soybean in Indiana, Douglas-fir in Oregon, and weeds in alfalfa fields in New York (4). To our knowledge, this is the first report of P. sansomeana infecting corn in Ohio, albeit other isolates have previously been recovered from soybean in the state. There are four previous reports of Phytophthora spp. affecting corn in the United States and Mexico (3). Crop rotation will have little effect in management of this pathogen since corn and soybean are produced in the same fields continuously throughout the state. References: (1) K. E. Broders et al. Plant. Dis. 91:727, 2007. (2) D. E. L. Cooke et al. Fungal Genet. Biol. 30:17, 2000. (3) D. F. Farr et al. Fungi on Plants and Plant Products in the United States. The American Phytopathological Society, St. Paul, MN. 1989. (4) E. M. Hansen et al. Mycologia 101:129, 2009.