186 research outputs found
The red giants in NGC 6633 as seen with CoRoT, HARPS and SOPHIE
The open cluster NGC 6633 was observed with CoRoT in 2011 and simultaneous
high-resolution spectroscopy was obtained with the SOPHIE and HARPS
spectrographs. One of the four targets was not found to be a cluster member.
For all stars we provide estimates of the seismic and spectroscopic parameters.Comment: Proc. of the workshop "Asteroseismology of stellar populations in the
Milky Way" (Sesto, 22-26 July 2013), Astrophysics and Space Science
Proceedings, (eds. A. Miglio, L. Girardi, P. Eggenberger, J. Montalban
Population perception of surgical safety and body image trauma: a plea for scarless surgery?
Background: Laparoendoscopic single-site surgery (LESS) and natural orifice translumenal endoscopic surgery (NOTES) are prospected as the future of minimally invasive surgery. While scarless surgery (NOTES and LESS) is gaining increasing popularity, perception of these approaches should be investigated. Methods: An anonymous questionnaire describing laparoscopy, LESS, and NOTES was given to medical staff (n=120), paramedical staff (n=100), surgical patients (n=100), and the general population (n=100). The survey participants (median age, 37 years; range, 18-81years) were queried about their expectations for surgical treatment and their approach preference. Results: The first concern of the survey responders was the risk of surgical complications (92%). When asked about the respective importance of surgical safety, cure, and cosmetics, cure was placed first by 74%, safety by 33%, and cosmetics by 3%. These results were not influenced by sex, age, prior surgery or endoscopy, or education. When operative risk was similar, 90% of the participants preferred a scarless approach (75% preferred LESS and 15% preferred NOTES) to laparoscopy. The scarless approach preference was significantly higher among the younger participants (age <40years; p=0.026), whereas sex showed no influence. The LESS preference was significantly higher among patients and the general population (86%) than among medical (67%) and paramedical (70%) staffs (p<0.001). A decreasing trend of preference for LESS and NOTES was observed with increased procedural risks. Conclusion: Although cure and safety remain the main concern, the population has a favorable perception of scarless surgery, even in the case of increased procedural risk, with LESS favored over NOTES. Such a popular adoption of scarless surgery should warrant the promotion of further research, technological innovations, and the establishment of surgeon training to improve its safet
Development of CMOS Pixel Sensors fully adapted to the ILD Vertex Detector Requirements
CMOS Pixel Sensors are making steady progress towards the specifications of
the ILD vertex detector. Recent developments are summarised, which show that
these devices are close to comply with all major requirements, in particular
the read-out speed needed to cope with the beam related background. This
achievement is grounded on the double- sided ladder concept, which allows
combining signals generated by a single particle in two different sensors, one
devoted to spatial resolution and the other to time stamp, both assembled on
the same mechanical support. The status of the development is overviewed as
well as the plans to finalise it using an advanced CMOS process.Comment: 2011 International Workshop on Future Linear Colliders (LCWS11),
Granada, Spain, 26-30 September 201
Surgical management of abdominal and retroperitoneal Castleman's disease
BACKGROUND: Abdominal and retroperitoneal Castleman's disease could present either as a localized disease or as a systemic disease. Castleman's disease is a lymphoid hyperplasia related to human Herpes virus type 8, which could have an aggressive behavior, similar to that of malignant lymphoid neoplasm mainly with the systemic type, or a benign one in its localized form. METHODS: The authors report two cases of localized Castleman's disease in the retroperitoneal space and review the current and recent progress in the knowledge of this atypical disease. CASES PRESENTATION: The two patients were young healthy women presenting with a hyper vascular peri-renal mass suggestive of malignant tumor. Both have been resected in-toto. One of them had an extensive resection with nephrectomy, while the second had a kidney preserving surgery. Pathological examination revealed localized Castleman's disease and surgical margins were free of disease. Postoperative course was uneventful, and after more than 5-years of follow-up no recurrences have been observed. CONCLUSION: Localized Castleman's disease should be considered when facing a solid hypervascular abdominal or retroperitoneal mass. A better knowledge of this disorder and its characteristic would help surgeon to avoid unnecessarily extensive resection for this benign disorder when dealing with abdominal or retroperitoneal tumors. Surgical resection is curative for the localized form, when complete, while splenectomy could be indicated for the systemic form
VLTI/VINCI diameter constraints on the evolutionary status of delta Eri, xi Hya, eta Boo.
other location: http://www.obs-nice.fr/pichon/science.html ; Accepted for publication in Astron. Astrophys.International audienceUsing VLTI/VINCI angular diameter measurements, we constrain the evolutionary status of three asteroseismic targets: the stars Eri, Hya, Boo. Our predictions of the mean large frequency spacing of these stars are in agreement with published observational estimations. Looking without success for a companion of Eri we doubt on its classification as an RS CVn star
Surgical Treatment of Appendiceal Adenocarcinoid (Goblet Cell Carcinoid)
Adenocarcinoid of the appendix is an infrequent tumor with histologic features of both adenocarcinoma and carcinoid tumor. Although its malignant potential remains unclear, adenocarcinoids seem to be biologically more aggressive than conventional carcinoids. The aim of this study was to analyze long-term results of surgical treatment for appendiceal adenocarcinoid. A retrospective review (1991-2003) identified seven patients (median age 72, range 27-81 years) treated for appendiceal adenocarcinoid. The clinical data of these patients were reviewed. Follow-up was complete for all patients (median 60 months, range 24-108 months). Most cases presented with associated acute appendicitis (71%). First intention surgery consisted of appendectomy (m = 6) and right hemicolectomy (m = 1). In three patients, additional surgical procedures were performed (right colectomy). Indications for colectomy were tumor size (three cases) associated with appendectomy margin invasion in one case. One patient with lymph node and peritoneal involvement experienced recurrence 9 months after hemicolectomy and died of the disease at 2 years. One patient subsequently died of colon carcinoma 6 years after adenocarcinoid treatment. Five patients were alive without disease at the time of the last follow-up. Synchronous or metachronous colon carcinomas developed in three patients (43%). Our results suggest that appendectomy alone could be used for appendiceal adenocarcinoid provided that the tumor (1) is less than 1 cm; (2) does not extend beyond the appendix adventitia; (3) has less than 2 mitoses/10 high power fields; and (4) has surgical margins that are tumor free. Otherwise, carcinologic right colectomy seems to be indicated. The risk for developing colorectal adenocarcinoma seems to be extremely high in patients treated for appendiceal adenocarcinoid and warrants close follow-up with colonoscopic screenin
Hygrothermal behaviour of hemp concrete; experimental evidences and modelling
This paper presents experimental hygrothermal data of an hemp concrete wall of dimensions 0.9×0.9×0.1 [m3]. The wall is instrumented with sensors to monitor temperature, relative humidity at the middle of the wall and incoming heat flows at the external surfaces. It is placed in a double climatic chamber that allows the regulation of temperature and relative humidity on each side of the wall, independently to each other. The experimental results leads to a clear identification of the coupling between the variation of the relative humidity inside the wall and its temperature. The validity of the commonly adopted assumptions for hygrothermal simulation are finally analyzed in the light of these experimental results. The material parameters used for the simulations are measured separately on decimetric samples of the same hemp concrete, which comes from the same mix and with the same apparent density
VLTI status update: a decade of operations and beyond
We present the latest update of the European Southern Observatory's Very
Large Telescope interferometer (VLTI). The operations of VLTI have greatly
improved in the past years: reduction of the execution time; better offering of
telescopes configurations; improvements on AMBER limiting magnitudes; study of
polarization effects and control for single mode fibres; fringe tracking real
time data, etc. We present some of these improvements and also quantify the
operational improvements using a performance metric. We take the opportunity of
the first decade of operations to reflect on the VLTI community which is
analyzed quantitatively and qualitatively. Finally, we present briefly the
preparatory work for the arrival of the second generation instruments GRAVITY
and MATISSE.Comment: 10 pages, 7 figures, Proceedings of the SPIE, 9146-1
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