487 research outputs found
Identification of Command and Control Information Requirements for the Cyberspace Domain
The purpose of this research was to develop an information requirements analysis method that would provide the Director of Cyberspace Forces with the information required to support effective command and control of cyberspace. This research investigates the role of information in command and control, information in the traditional war fighting domains, cyberspace as a war fighting domain, and various methods of determining information requirements of organizations. This research produced an information requirements analysis method that is suitable for identifying the command and control information requirements of the Director of Cyberspace Forces
Vapnik-Chervonenkis density in some theories without the independence property, I
We recast the problem of calculating Vapnik-Chervonenkis (VC) density into
one of counting types, and thereby calculate bounds (often optimal) on the VC
density for some weakly o-minimal, weakly quasi-o-minimal, and -minimal
theories.Comment: 59
Biochemical correlates of cardiac hypertrophy. IV. Observations on the cellular organization of growth during myocardial hypertrophy in the rat
The mechanisms by which the DNA content of the heart increases following acutely induced cardiac hypertrophy were investigated in mature Sprague-Dawley rats. Special attention was given to the cellular organization of the growth process. Autoradiographic studies provided conclusive evidence that the uptake of tritiated thymidine is completely limited to nonmuscular cellular elements, chiefly connective tissue cells. The frequency of labeled nuclei was increased by sixfold during hypertrophy. The thymidine pool was not appreciably different in the hypertrophied hearts. Connective tissue nuclei formed a larger proportion of the total nuclear population in hypertrophied hearts, and their distribution was less uniform than in the normal heart. Quantitative histologic studies also showed that the total number of left ventricular muscle cell nuclei did not increase during hypertrophy but rather may have decreased slightly. Both the concentration and the total amount of hydroxyproline increased in parallel with the proliferative changes in the connective tissue and provide further supportive evidence to the autoradiographic and histologic studies
The blue supergiant Sher 25 revisited in the Gaia era
Aims. The evolutionary status of the blue supergiant Sher 25 and its
membership to the massive cluster NGC 3603 are investigated. Methods. A hybrid
non-LTE (local thermodynamic equilibrium) spectrum synthesis approach is
employed to analyse a high-resolution optical spectrum of Sher 25 and five
similar early B-type comparison stars in order to derive atmospheric parameters
and elemental abundances. Fundamental stellar parameters are determined by
considering stellar evolution tracks, Gaia Data Release 3 (DR3) data and
complementary distance information. Interstellar reddening and the reddening
law along the sight line towards Sher 25 are constrained employing UV
photometry for the first time in addition to optical and infrared data. The
distance to NGC 3603 is reevaluated based on Gaia DR3 data of the innermost
cluster O-stars. Results. The spectroscopic distance derived from the
quantitative analysis implies that Sher 25 lies in the foreground of NGC 3603,
which is found to have a distance of = 6250150 pc. A
cluster membership is also excluded as the hourglass nebula is unaffected by
the vigorous stellar winds of the cluster stars and from the different
excitation signatures of the hourglass nebula and the nebula around NGC 3603.
Sher 25 turns out to have a luminosity of log L/L = 5.480.14,
equivalent to that of a 27 supergiant in a single-star
scenario, which is about half of the mass assumed so far, bringing it much
closer in its characteristics to Sk-69{\deg}202, the progenitor of SN 1987A.
Sher 25 is significantly older than NGC 3603. Further arguments for a binary
(merger) evolutionary scenario of Sher 25 are discussed.Comment: 27 pages, 22 figures, Accepted for publication in Astronomy &
Astrophysics, Data: https://doi.org/10.5281/zenodo.823015
Characterizing Synchronization in Time Series using Information Measures Extracted from Symbolic Representations
We present a methodology to characterize synchronization in time series based
on symbolic representations. A symbol is linked to a sequence of numbers
through the rank-order of its values. A representation of a time series results
after mapping all sequences into symbols. We propose a transcription scheme
between symbolic representations to study the dynamics of coupled systems. This
scheme allows us to use elements of group theory and to derive information
measures to assess the degree of synchronization. We apply our method to a
prototype non-linear system which displays a rich coupled dynamics.Comment: 9 pages, 4 figure
The Impact of Olfactory Disorders in the United Kingdom
Olfactory disorders are believed to affect 5% of the general population and have been shown to bear significant psychosocial consequences to sufferers. Although more common than blindness and profound deafness in the United Kingdom, the impact of these disorders has not been assessed to date and the plight of British patients has yet to be quantified. In 2012, a patient support organization, Fifth Sense, was founded to provide information and support to sufferers of chemosensory disorders. Following a recent members conference, a survey of the membership was conducted anonymously using a series of questions based on an existing olfactory disorders questionnaire. From 496 respondents, this has demonstrated high rates of depression (43%) and anxiety (45%), impairment of eating experience (92%), isolation (57%), and relationship difficulties (54%). Women appear to have significantly more issues than men in terms of social and domestic dysfunction relating to olfactory loss (P = 0.01). Qualitative disorders also affected more than 1 in 5 members with parosmia reported in 19% and phantosmia in 24%. This paper discusses the details of the British story of anosmia and other related disorders as depicted by those most affected
A Computation of the Maximal Order Type of the Term Ordering on Finite Multisets
We give a sharpening of a recent result of Aschenbrenner and Pong about the maximal order type of the term ordering on the finite multisets over a wpo. Moreover we discuss an approach to compute maximal order types of well-partial orders which are related to tree embeddings
Operative outcome of hernia repair with synthetic mesh in immunocompromised patients
Background: The safety of synthetic mesh in elective hernia repair in the setting of immunosuppression lacks national and international consensus. The aim of our analysis was to explore the effects of immunosuppression on the rates of wound complications.
Methods: Comparative analysis of immunocompetent and immunocompromised patients with elective mesh repair of inguinal, femoral, primary ventral, incisional or parastomal hernia between January 2001 and December 2013. Immunosuppression included glucocorticoids, biologicals, chemotherapy and chemoradiotherapy. Primary outcome parameter was mesh infection rate. Follow-up questionnaires were completed in written form or by telephone interview.
Results: Questionnaire response rate was 59.5% (n= 194) with a median follow-up of 33 (interquartile range: 28-41) months. There were no differences between immunocompromised (n= 40, 20.6%) and immunocompetent patients (n= 154, 79.4%) based on hernia and patient characteristics. Immunosuppression was not associated with the rates of mesh infection (P= 1.000), surgical site infection (SSI,P= 0.330) or re-operation for SSI (P= 0.365), but with higher rates (P= 0.007) and larger odds for hernia recurrence (odds ratio 3.264, 95% confidence interval 1.304-8.172;P= 0.012). Mesh infection also increased the odds for hernia recurrence (odds ratio 11.625; 95% confidence interval 1.754-77.057;P= 0.011). Only in the subset of ventral/incisional hernias, immunocompromised (n= 8, 40%) patients had higher recurrence rates than immunocompetent patients (n= 5, 11.6%;P= 0.017). Patients with SSI reported more frequently moderate to severe dysesthesia at the surgical site (P= 0.013) and would less frequently re-consent to surgery (P= 0.006). Conclusion Immunosuppression does not increase the rate of wound infections after elective hernia repair with synthetic mesh. However, immunosuppression and mesh infection are risk factors for hernia recurrence
Reference Network and Localization Architecture for Smart Manufacturing based on 5G
5G promises to shift Industry 4.0 to the next level by allowing flexible
production. However, many communication standards are used throughout a
production site, which will stay so in the foreseeable future. Furthermore,
localization of assets will be equally valuable in order to get to a higher
level of automation. This paper proposes a reference architecture for a
convergent localization and communication network for smart manufacturing that
combines 5G with other existing technologies and focuses on high-mix low-volume
application, in particular at small and medium-sized enterprises. The
architecture is derived from a set of functional requirements, and we describe
different views on this architecture to show how the requirements can be
fulfilled. It connects private and public mobile networks with local networking
technologies to achieve a flexible setup addressing many industrial use cases.Comment: 10 pages; submitted to 6th International Conference on
System-Integrated Intelligence. Intelligent, flexible and connected systems
in products and production, 7-9 September Genova, Ital
- …