134,562 research outputs found
A Remark on Construction of BIB Designs with v = 2k
No full text3 pages, 1 article*A Remark on Construction of BIB Designs with v = 2k* (Seiden, Esther) 3 page
An algebraic study of BIB designs: A complete solution for v = 6 and k = 3
No full textAbstractThe set of all distinct blocks of a BIB design is referred to as the support of the design. The family of BIB designs with v = 6 and k = 3 is studied in depth from the view of possible support sizes. Via a linear algebraic technique it is shown that: (i) a BIB design with v = 6 and k = 3 exists if and only if the support size belongs to {10, 14, 16, 17, 18, 19, 20}; (ii) the minimum block size, b, needed to obtain a BIB design with support size b∗ is given by: b∗10141617181920b10202030403020(iii) if, for a given b, a BIB design for v = 6 and k = 3 with support size b∗ exists, then we can construct a BIB design with support size b∗ and any larger admissible b
Il palloncino intragastrico BIB
No full textINTRODUCTION: Since 1998, we adopted in our clinical practice for obesity treatment the new intragastric balloon (BioEnterics Intragastric Balloon, BIB), it has the characteristics of an "ideal gastric balloon" (Workshop Tarpon Springs, 1987). MATERIALS AND METHODS: Since March 1998 we have placed by endoscopic approach 518 BIB in 480 patients affected by first, second and severe morbid obesity; 124 male and 356 female, mean age 41.6 years (18-72), mean weight Kg 116.9 (67-229), mean BMI 42 Kg/m2 (27.34-81.14). All our patients underwent to diet of 1000 Kcal/day and treatment with antisecretory drugs. RESULTS: The mean weight lost was Kg 14.69 and the mean reduction in BMI was 5.11 Kg/m2. Weight loss was greater in male severe obese (BMI > 40). Weight was accompanied by an improvement of the disease associated with obesity, in particular diabetes, hypertension and sleep apnoea. DISCUSSION AND CONCLUSION: The best indication for BIB were: morbidly obese patients (BMI > 40) and super-obese patients (BMI > 50) in preparation for bariatric operation; obese patients with BMI 35-40 with co-morbilities in preparation for bariatric surgery; obese patients with BMI < 30 only in a multidisciplinary approach patients with BMI 30-35 with a chronic disease otherwise unresolved
author-bios-SRD-19-0063.R1 – Supplemental material for The Network Structure of Police Misconduct
No full textSupplemental material, author-bios-SRD-19-0063.R1 for The Network Structure of Police Misconduct by George Wood, Daria Roithmayr and Andrew V. Papachristos in Socius</p
D-optimality of the dual of BIB designs
No full textBIB designs are shown to be D-optimal for the joint estimation of treatment contrasts and block contrasts over the class of all connected designs with v treatments in b blocks and a total of n observations. As a result, the dual of any BIB design is seen to be D-optimal for the estimation of treatment contrasts alone over the class of all connected designs with v treatments in b blocks of size k.D-optimality BIB designs dual designs two-factor designs
Ausschreibung der Kommission Informationskompetenz des Deutschen Bibliotheksverbandes e. V. und des Vereins Deutscher Bibliothekarinnen und Bibliothekare e. V. zum 01.07.2021
No full textAusschreibung der Baukommission des Deutschen Bibliotheksverbandes e. V. und des Vereins Deutscher Bibliothekarinnen und Bibliothekare e. V. zum 01.07.2021
No full textMicro-machined membrane deformable mirrors for cryogenic adaptive optics
No full textIn this Thesis, the suitability of 37 actuator Micro-machined membrane deformable mirrors (MMDM) for adaptive optics at cryogenic temperatures is evaluated. A method is described to safely cool MMDMs to 78K. The initial surface figures of three MMDMs are examined using a Zygo phase shifting interferometer to evaluate the effects of both evacuating and cooling the MMDM. The cooling process increases the aberrations inherent in the MMDMs' membranes. One of the MMDMs evaluated is found to have intrinsic aberrations sufficiently small to leave substantial dynamic range free for wavefront correction; the available range is determined by the beam diameter being corrected. The influence functions of the actuators of the MMDMs are then examined; the cooling process leaves the form of the influence functions unchanged, but reduces the magnitude by 20%.The dynamic response is evaluated for MMDMs up to a driving frequency of 500Hz. Evacuation, which removes air damping, has no effect on the dynamic response. Cooling the MMDMs shows a high frequency ringing at a frequency of 2kHz, irrespective of MMDM driving frequency. This effect is very small for the MMDM with the superior initial surface figure, which can be considered to be suitable for operation in a cryogenic adaptive optics system. This was the first demonstration of an adaptive optical element functioning at cryogenic temperatures. A simulation is developed to demonstrate that an adaptive optics system could be constructed utilising a MMDM and a curvature sensor that corrects wavefronts without a wavefront reconstruction step. This system gives good correction for defocus, coma and spherical aberration, with reasonable correction for astigmatism. Potential avenues for future exploration are discussed, notably the prospect of optimising the design of MMDMs for cryogenic operation
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Ausschreibung der Managementkommission des Deutschen Bibliotheksverbandes e. V. und des Vereins Deutscher Bibliothekarinnen und Bibliothekare e. V. zum 01.07.2021
No full text- …
