| 1. |
|
|
| 2. |
|
|
| 3. |
- Adiels, Lars, 1952-, et al.
(författare)
-
Test of CP violation with K0 and K‾0 at LEAR
- 1985
-
Ingår i: Physics with antiprotons at LEAR in the ACOL era. - Gif sur Yvette : Editions Frontières. - 2863320351 ; , s. 467-482
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)
|
|
| 4. |
|
|
| 5. |
|
|
| 6. |
|
|
| 7. |
- Adiels, L., et al.
(författare)
-
Pi0 And Eta Spectroscopy At Lear
- 1986
-
Ingår i: Tignes 1985, Proceedings, Physics With Antiprotons At Lear In The Acol Era. ; , s. 359-359
-
Konferensbidrag (refereegranskat)
|
|
| 8. |
- Stavrou, Photios A., et al.
(författare)
-
Asymptotic Reverse-Waterfilling Characterization of Nonanticipative Rate Distortion Function of Vector-Valued Gauss-Markov Processes with MSE Distortion
- 2018
-
Ingår i: 2018 IEEE Conference on Decision and Control (CDC). - : Institute of Electrical and Electronics Engineers (IEEE). - 9781538613955 ; , s. 14-20
-
Konferensbidrag (refereegranskat)abstract
- We analyze the asymptotic nonanticipative rate distortion function (NRDF) of vector-valued Gauss-Markov processes subject to a mean-squared error (MSE) distortion function. We derive a parametric characterization in terms of a reverse-waterfilling algorithm, that requires the solution of a matrix Riccati algebraic equation (RAE). Further, we develop an algorithm reminiscent of the classical reverse-waterfilling algorithm that provides an upper bound to the optimal solution of the reverse-waterfilling optimization problem, and under certain cases, it operates at the NRDF. Moreover, using the characterization of the reverse-waterfilling algorithm, we derive the analytical solution of the NRDF, for a simple two-dimensional parallel Gauss-Markov process. The efficacy of our proposed algorithm is demonstrated via an example.
|
|
| 9. |
- Stavrou, P. A., et al.
(författare)
-
Filtering with fidelity for time-varying Gauss-Markov processes
- 2016
-
Ingår i: Proceedings of the 55th IEEE Conference on Decision and Control (CDC 2016). - 0743-1546. - 9781509018376 ; , s. 5465-5470
-
Konferensbidrag (refereegranskat)abstract
- In this paper, we revisit the relation between Nonanticipative Rate Distortion (NRD) theory and real-time realizable filtering theory. Specifically, we give the closed form expression for the optimal nonstationary (time-varying) reproduction distribution of the Finite Time Horizon (FTH) Nonanticipative Rate Distortion Function (NRDF) and we establish its connection to real-time realizable filtering theory via a realization scheme utilizing time-varying fully observable multidimensional Gauss-Markov processes. As an application we provide the optimal filter with respect to a mean square error constraint. Unlike classical filtering theory, our filtering approach based on FTH NRDF is performed with waterfilling. We also derive a universal lower bound to the mean square error of any causal estimator to Gaussian processes based on the closed form expression of FTH NRDF. Our theoretical results are demonstrated via an illustrative example.
|
|
| 10. |
- Stavrou, Photios A., et al.
(författare)
-
OPTIMAL ESTIMATION VIA NONANTICIPATIVE RATE DISTORTION FUNCTION AND APPLICATIONS TO TIME-VARYING GAUSS-MARKOV PROCESSES
- 2018
-
Ingår i: SIAM Journal of Control and Optimization. - : SIAM PUBLICATIONS. - 0363-0129 .- 1095-7138. ; 56:5, s. 3731-3765
-
Tidskriftsartikel (refereegranskat)abstract
- In this paper, we develop finite-time horizon causal filters for general processes taking values in Polish spaces using the nonanticipative rate distortion function (NRDF). Subsequently, we apply the NRDF to design optimal filters for time-varying vector-valued Gauss-Markov processes, subject to a mean-squared error (MSE) distortion. Unlike the classical Kalman filter design, the developed filters based on the NRDF are characterized parametrically by a dynamic reverse-waterfilling optimization problem obtained via Karush-Kuhn-Tucker conditions. We develop algorithms that provide, in general, tight upper bounds to the optimal solution to the dynamic reverse-waterfilling optimization problem subject to a total and per-letter MSE distortion constraint. Under certain conditions, these algorithms produce the optimal solutions. Further, we establish a universal lower bound on the total and per-letter MSE of any estimator of a Gaussian random process. Our theoretical framework is demonstrated via simple examples.
|
|
| 11. |
- Adiels, Lars, et al.
(författare)
-
A π0 and η spectrometer of lead glass and BGO for momenta up to 1 GeV/c
- 1986
-
Ingår i: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576. ; 244:3, s. 380-390
-
Tidskriftsartikel (refereegranskat)abstract
- A spectrometer consisting of two sets of bismuth germanium oxide (BGO) crystals and a lead-glass array has been used to measure the [pi]0 and [eta] momentum spectra produced from proton-antiproton annihilations at rest. We describe the test of the BGO sets in electron beams of energies from 50 to 450 MeV. We discuss the method of construction and calibration of the lead-glass array, as well as procedures to extract the energy and position resolutions for detected photons. A momentum resolution ([sigma]) for [pi]0’s and [eta]’s of 4% and 3%, respectively has been achieved at momenta below 1 GeV/c.
|
|
| 12. |
- Adiels, L., et al.
(författare)
-
Experimental determination of the branching ratios {Mathematical expression}, and 2γ at rest
- 1987
-
Ingår i: Zeitschrift für Physik C Particles and Fields. - : Springer. - 0170-9739 .- 1431-5858. ; 35:1, s. 15-19
-
Tidskriftsartikel (refereegranskat)abstract
- The branching ratios of {Mathematical expression} annihilations into the neutral final states 2π 0, π 0γ, and 2γ are measured by stopping antiprotons in liquid hydrogen. They are {Mathematical expression}, {Mathematical expression}, and B γγ<1.7×10 -6 (95% c.l.).
|
|
| 13. |
- Adiels, L., et al.
(författare)
-
Experimental determination of the branching ratios proton-antiproton -> 2pi0, pi0γ and γγ at rest
- 1987
-
Ingår i: Zeitschrift für Physik C Particles and Fields. - 0170-9739. ; 35:1, s. 15-19
-
Tidskriftsartikel (refereegranskat)abstract
- The branching ratios of Mathematical expression annihilations into the neutral final states 2π0, π0γ, and 2γ are measured by stopping antiprotons in liquid hydrogen. They are Mathematical expression, Mathematical expression, and Bγγ<1.7×10-6 (95% c.l.). © 1987 Springer-Verlag.
|
|
| 14. |
- Adiels, L., et al.
(författare)
-
Experimental study of the inclusive η-spectrum from p {Mathematical expression} annihilations at rest in liquid hydrogen
- 1989
-
Ingår i: Zeitschrift für Physik C Particles and Fields. - : Springer. - 0170-9739 .- 1431-5858. ; 42:1, s. 49-58
-
Tidskriftsartikel (refereegranskat)abstract
- The inclusive η-momentum spectrum from {Mathematical expression} annihilations at rest in liquid hydrogen was measured at LEAR. Branching ratios were obtained for {Mathematical expression}, and ηη(8.1±3.1)×10 -5. An upper limit for {Mathematical expression} of 1.8×10 -4 at 95% CL was found. The ratio of the branching ratios is BR(ηρ{variant})/BR(ηω)=0.51 -0.06 +0.20. For the ratio of branching ratios into two pseudoscalar mesons, we have BR(ηπ 0)/BR(π 0π 0)=0.65±0.14, BR(ηη)/BR(π 0π 0), BR(ηη ′)/BR(π 0π 0) at 95% CL, and BR(ηη)/BR(ηπ 0). © 1989 Springer-Verlag.
|
|
| 15. |
- Adiels, Lars, et al.
(författare)
-
Experimental study of the inclusive η-spectrum from proton-antiproton annihilations at rest in liquid hydrogen
- 1989
-
Ingår i: Zeitschrift für Physik C Particles and Fields. - 0170-9739 .- 1431-5858. ; 42, s. 49-58
-
Tidskriftsartikel (refereegranskat)abstract
- The inclusive η-momentum spectrum from Mathematical expression annihilations at rest in liquid hydrogen was measured at LEAR. Branching ratios were obtained for Mathematical expression, and ηη(8.1±3.1)×10-5. An upper limit for Mathematical expression of 1.8×10-4 at 95% CL was found. The ratio of the branching ratios is BR(ηÏvariant)/BR(ηω)=0.51-0.06+0.20. For the ratio of branching ratios into two pseudoscalar mesons, we have BR(ηπ0)/BR(Ï€0Ï€0)=0.65±0.14, BR(ηη)/BR(Ï€0Ï€0), BR(ηη′)/BR(Ï€0Ï€0) at 95% CL, and BR(ηη)/BR(ηπ0). © 1989 Springer-Verlag.
|
|
| 16. |
- Adiels, L., et al.
(författare)
-
Investigations on baryonium and other rare pmacrp annihilation modes using high resolution pi0 spectrometers (PS 182)
- 1985
-
Ingår i: Antiproton 1984. Proceedings of the VII European Symposium on Antiproton Interactions. - : Institution of Electrical Engineers (IEE). ; , s. 297-304
-
Konferensbidrag (refereegranskat)abstract
- In the search for heavy, narrow exotic states such as baryonium or glueballs, carried out so far, various methods of high- and low-energy production, low-energy formation, and e+e- reactions were used. In particular, a search for baryonium states below threshold (mxlsimmppmacr) has shown some evidence [Richter et al., 1983, Brando et al., 1984] for a few states. However, the results of these measurements suffer from poor statistics. Among the possible methods which can be applied in the baryonium bound state research at LEAR, the authors consider the study of the reaction ppmacrrarrX+pi0 as the most promising. They have performed an experiment to study this reaction by means of an experimental set-up especially tailored for measuring monoenergetic pi0,s, allowing for both angular distribution measurements and high-resolution spectroscopy. They report on the preliminary results from our actual measurements of the inclusive pi0 and eta spectra following the antiproton annihilation at rest.
|
|
| 17. |
|
|
| 18. |
|
|
| 19. |
- Adiels, L., et al.
(författare)
-
Search for narrow signals in the [gamma]-spectrum from [Proton-antiproton] annihilation at rest
- 1986
-
Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 182:3-4, s. 405-408
-
Tidskriftsartikel (refereegranskat)abstract
- The [gamma]-spectrum originating from pp[combining macron] annihilations at rest in liquid hydrogen was measured with two BGO spectrometers. A total of 24 ï¿œ 106[gamma]’s were accumulated. No narrow peaks indicating exotic states such as baryonium were observed. The upper limit for the branching ratio with 1040 [less-than-or-equals, slant] mx [less-than-or-equals, slant] 1770 MeV/c2 and with [lambda]x [less-than-or-equals, slant] 25 MeV/c2 is less than 10-3 with more than 99.96% confidence.
|
|
| 20. |
- Adiels, L., et al.
(författare)
-
Search for narrow signals in the γ-spectrum from pp̄ annihilation at rest
- 1986
-
Ingår i: Physics Letters B. - : Elsevier. - 0370-2693 .- 1873-2445. ; 182:3-4, s. 405-408
-
Tidskriftsartikel (refereegranskat)abstract
- The γ-spectrum originating from pp̄ annihilations at rest in liquid hydrogen was measured with two BGO spectrometers. A total of 24 × 10 6 γ's were accumulated. No narrow peaks indicating exotic states such as baryonium were observed. The upper limit for the branching ratio p p ̄ → γ + X with 1040 ≤ m x ≤ 1770 MeV/c 2 and with λ x ≤ 25 MeV/c 2 is less than 10 -3 with more than 99.96% confidence. © 1986.
|
|
| 21. |
- Adiels, L, et al.
(författare)
-
Some results of experiment PS182 at LEAR
- 1986
-
Ingår i: Antiproton 86. - Singspore : World Scientific Publishing. - 9971503131 ; , s. 199-204, s. 199-204
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)
|
|
| 22. |
- Adiels, L, et al.
(författare)
-
π0 and η spectroscopy at LEAR
- 1985
-
Ingår i: Physics with antiprotons at LEAR in the ACOL era. - Gif sur Yvette : Editions Frontières. - 2863320351 ; , s. 359-360
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)
|
|
| 23. |
- Charalambous, Andreas, et al.
(författare)
-
Content of Orthopedic Patient Education Provided by Nurses in Seven European Countries
- 2018
-
Ingår i: Clinical Nursing Research. - : SAGE PUBLICATIONS INC. - 1054-7738 .- 1552-3799. ; 27:7, s. 770-789
-
Tidskriftsartikel (refereegranskat)abstract
- Patients and their significant others education during the perioperative phase is an important and challenging aspect of care. This study explored the content of education provided by nurses to arthroplasty patients and their significant others. Data were collected with the Education of Patients-NURSE content (EPNURSE-Content), Received Knowledge of Hospital Patient (RKhp), and Received Knowledge of Significant Other (RKso) scales. The results showed that the content of education emphasized biophysiological and functional needs, differed between countries, and was related to how physically demanding nurses found their job to be and the amount of education provided. There is congruence between the received knowledge of patients and their significant others in relation to the content of education provided by nurses. The findings can support nurses in developing aid material for patients and significant others explaining the nature of education and advising them what to expect and how to optimize their participation in the process.
|
|
| 24. |
- Csikos, A, et al.
(författare)
-
Network traffic flow optimization under performance constraints
- 2017
-
Ingår i: Transportation Research, Part C: Emerging Technologies. - : Elsevier BV. - 0968-090X. ; 83, s. 120-133
-
Tidskriftsartikel (refereegranskat)abstract
- In this paper, a model-based perimeter control policy for large-scale urban vehicular networks is proposed. Assuming a homogeneously loaded vehicle network and the existence of a well-posed Network Fundamental Diagram (NFD), we describe a protected network throughout its aggregated dynamics including nonlinear exit flow characteristics. Within this framework of constrained optimal boundary flow gating, two main performance metrics are considered: (a) first, connected to the NFD, the concept of average network travel time and delay as a performance metric is defined; (b) second, at boundaries, we take into account additional external network queue dynamics governed by uncontrolled inflow demands. External queue capacities in terms of finite-link lengths are used as the second performance metric. Hence, the corresponding performance requirement is an upper bound of external queues. While external queues represent vehicles waiting to enter the protected network, internal queue describes the protected network’s aggregated behavior.By controlling the number of vehicles joining the internal queue from the external ones, herewith a network traffic flow maximization solution subject to the internal and external dynamics and their performance constraints is developed. The originally non-convex optimization problem is transformed to a numerically efficiently convex one by relaxing the performance constraints into time-dependent state boundaries. The control solution can be interpreted as a mechanism which transforms the unknown arrival process governing the number of vehicles entering the network to a regulated process, such that prescribed performance requirements on travel time in the network and upper bound on the external queue are satisfied. Comparative numerical simulation studies on a microscopic traffic simulator are carried out to show the benefits of the proposed method.
|
|
| 25. |
- Csikos, A, et al.
(författare)
-
Traffic flow optimization with QoS constrained network admission control
- 2017
-
Ingår i: IFAC-PapersOnLine. - : Elsevier BV. - 2405-8963. ; 50:1, s. 5275-5280
-
Konferensbidrag (refereegranskat)abstract
- The paper proposes a control design method in order to gate input flow to a protected urban vehicular network such that travel time Quality of Service (QoS) constraints are preserved within the network. In view of the network to be protected (also called the region), two types of queues are distinguished: external and internal. While external queues represent vehicles waiting to enter the protected network, an internal queue can be used to describe the network's aggregated behaviour. By controlling the number of vehicles entering the internal queue, the travel time within the network subject to the vehicular conservation law and the Network Fundamental Diagram (NFD) can be subsequently controlled. The admission controller can thus be interpreted as a mechanism which transforms the unknown arrival process governing the number of vehicles entering the network to a regulated process, such that prescribed QoS requirements on travel time in the network and upper bound on the external queue are satisfied. The admission control problem is formulated as a constrained convex optimization problem and a Model Predictive Control (MPC) problem. A case study demonstrates the benefits of the admission control mechanisms proposed.
|
|
| 26. |
|
|
| 27. |
|
|
| 28. |
- Karat, Aaron S., et al.
(författare)
-
Measuring mortality due to HIV-associated tuberculosis among adults in South Africa : Comparing verbal autopsy, minimally-invasive autopsy, and research data
- 2017
-
Ingår i: PLOS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 12:3
-
Tidskriftsartikel (refereegranskat)abstract
- Background The World Health Organization (WHO) aims to reduce tuberculosis (TB) deaths by 95% by 2035; tracking progress requires accurate measurement of TB mortality. International Classification of Diseases (ICD) codes do not differentiate between HIV-associated TB and HIV more generally. Verbal autopsy (VA) is used to estimate cause of death (CoD) patterns but has mostly been validated against a suboptimal gold standard for HIV and TB. This study, conducted among HIV-positive adults, aimed to estimate the accuracy of VA in ascertaining TB and HIV CoD when compared to a reference standard derived from a variety of clinical sources including, in some, minimally-invasive autopsy (MIA). Methods and findings Decedents were enrolled into a trial of empirical TB treatment or a cohort exploring diagnostic algorithms for TB in South Africa. The WHO 2012 instrument was used; VA CoD were assigned using physician-certified VA (PCVA), InterVA-4, and SmartVA-Analyze. Reference CoD were assigned using MIA, research, and health facility data, as available. 259 VAs were completed: 147 (57%) decedents were female; median age was 39 (interquartile range [IQR] 33-47) years and CD4 count 51 (IQR 22-102) cells/mu L. Compared to reference CoD that included MIA (n = 34), VA underestimated mortality due to HIV/AIDS (94% reference, 74% PCVA, 47% InterVA-4, and 41% SmartVA-Analyze; chance-corrected concordance [CCC] 0.71, 0.42, and 0.31, respectively) and HIV-associated TB (41% reference, 32% PCVA; CCC 0.23). For individual decedents, all VA methods agreed poorly with reference CoD that did not include MIA (n = 259; overall CCC 0.14, 0.06, and 0.15 for PCVA, InterVA-4, and SmartVA-Analyze); agreement was better at population level (cause-specific mortality fraction accuracy 0.78, 0.61, and 0.57, for the three methods, respectively). Conclusions Current VA methods underestimate mortality due to HIV-associated TB. ICD and VA methods need modifications that allow for more specific evaluation of HIV-related deaths and direct estimation of mortality due to HIV-associated TB.
|
|
| 29. |
|
|
| 30. |
|
|
| 31. |
- Meisters, Rachelle, et al.
(författare)
-
EULAR/eumusc.net standards of care for rheumatoid arthritis : cross-sectional analyses of importance, level of implementation and care gaps experienced by patients and rheumatologists across 35 European countries
- 2020
-
Ingår i: Annals of the Rheumatic Diseases. - : BMJ. - 0003-4967 .- 1468-2060. ; 79:11, s. 1423-1431
-
Tidskriftsartikel (refereegranskat)abstract
- Objective As part of European League against Rheumatism (EULAR)/European Musculoskeletal Conditions Surveillance and Information Network, 20 user-focused standards of care (SoCs) for rheumatoid arthritis (RA) addressing 16 domains of care were developed. This study aimed to explore gaps in implementation of these SoCs across Europe. Methods Two cross-sectional surveys on the importance, level of and barriers (patients only) to implementation of each SoC (0-10, 10 highest) were designed to be conducted among patients and rheumatologists in 50 European countries. Care gaps were calculated as the difference between the actual and maximum possible score for implementation (ie, 10) multiplied by the care importance score, resulting in care gaps (0-100, maximal gap). Factors associated with the problematic care gaps (ie, gap≥30 and importance≥6 and implementation<6) and strong barriers (≥6) were further analysed in multilevel logistic regression models. Results Overall, 26 and 31 countries provided data from 1873 patients and 1131 rheumatologists, respectively. 19 out of 20 SoCs were problematic from the perspectives of more than 20% of patients, while this was true for only 10 SoCs for rheumatologists. Rheumatologists in countries with lower gross domestic product and non-European Union countries were more likely to report problematic gaps in 15 of 20 SoCs, while virtually no differences were observed among patients. Lack of relevance of some SoCs (71%) and limited time of professionals (66%) were the most frequent implementation barriers identified by patients. Conclusions Many problematic gaps were reported across several essential aspects of RA care. More efforts need to be devoted to implementation of EULAR SoCs.
|
|
| 32. |
|
|
| 33. |
|
|
| 34. |
- Rikos, A. I., et al.
(författare)
-
Distributed weight balancing over digraphs
- 2014
-
Ingår i: IEEE Transactions on Control of Network Systems. - : Institute of Electrical and Electronics Engineers (IEEE). - 2325-5870. ; 1:2, s. 190-201
-
Tidskriftsartikel (refereegranskat)abstract
- A weighted digraph is balanced if, for each node, the sum of the weights of the edges outgoing from that node is equal to the sum of the weights of the edges incoming to that node. Weight-balanced digraphs play a key role in a number of applications, including cooperative control, distributed optimization, and distributed averaging. We propose distributed algorithms that operate over static topologies, for solving the weight-balancing problem when the weights are either non-negative real numbers or when they are restricted to be non-negative integers. For the case of real weights, the proposed algorithm is shown to admit a geometric convergence rate. For the case of integer weights, the proposed algorithm is shown to converge after a finite number of iterations that we explicitly bound. We also provide examples to illustrate the operation, performance, and potential advantages of the proposed algorithms.
|
|
| 35. |
- Stavrou, Photios A., et al.
(författare)
-
Zero-Delay Rate Distortion via Filtering for Vector-Valued Gaussian Sources
- 2018
-
Ingår i: IEEE Journal on Selected Topics in Signal Processing. - : Institute of Electrical and Electronics Engineers (IEEE). - 1932-4553 .- 1941-0484. ; 12:5, s. 841-856
-
Tidskriftsartikel (refereegranskat)abstract
- We deal with zero-delay source coding of a vector-valued Gauss-Markov source subject to a mean-squared error (MSE) fidelity criterion characterized by the operational zero-delay vector-valued Gaussian rate distortion function (RDF). We address this problem by considering the nonanticipative RDF (NRDF), which is a lower bound to the causal optimal performance theoretically attainable function (or simply causal RDF) and operational zero-delay RDF. We recall the realization that corresponds to the optimal "test-channel" of the Gaussian NRDF, when considering a vector Gauss-Markov source subject to a MSE distortion in the finite time horizon. Then, we introduce sufficient conditions to show existence of solution for this problem in the infinite time horizon (or asymptotic regime). For the asymptotic regime, we use the asymptotic characterization of the Gaussian NRDF to provide a new equivalent realization scheme with feedback, which is characterized by a resource allocation (reverse-waterfilling) problem across the dimension of the vector source. We leverage the new realization to derive a predictive coding scheme via lattice quantization with subtractive dither and joint memoryless entropy coding. This coding scheme offers an upper bound to the operational zero-delay vector-valued Gaussian RDF. When we use scalar quantization, then for r active dimensions of the vector Gauss-Markov source the gap between the obtained lower and theoretical upper bounds is less than or equal to 0.254r + 1 bits/vector. However, we further show that it is possible when we use vector quantization, and assume infinite dimensional Gauss-Markov sources to make the previous gap to be negligible, i.e., Gaussian NRDF approximates the operational zero-delay Gaussian RDF. We also extend our results to vector-valued Gaussian sources of any finite memory under mild conditions. Our theoretical framework is demonstrated with illustrative numerical experiments.
|
|
| 36. |
- Suhonen, Riitta, et al.
(författare)
-
Hospitalised cancer patients' perceptions of individualised nursing care in four European countries
- 2018
-
Ingår i: European Journal of Cancer Care. - : Hindawi Limited. - 0961-5423 .- 1365-2354. ; 27:1
-
Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to describe hospitalised cancer patients' perceptions of individualised care in four European countries and compare these perceptions using the patients' socio-demographic characteristics and the Individualized Care Scale. The patients' socio-demographic characteristics used were: education, age, gender, type of hospital admission, previous hospitalisation and hospital length of stay. The Individualized Care Scale has two parts (1) nurses' support of individuality and (2) patients' receipt of individuality. Data (n = 599) were collected in Cyprus (n = 150), Finland (n = 158), Greece (n = 150) and Sweden (n = 141). Multivariate analysis of variance models were constructed and differences in perceptions of individualised care were analysed using the patients' socio-demographic characteristics as covariates. The level of support for individuality and receipt of individualised care was reported as moderate and good respectively. Generally, the highest assessments were made by the Swedish respondents and the lowest by those in Greece. This study revealed some between-country differences in patients' perceptions of care individualisation. These differences, for example, conceptual, educational, based in clinical practice or in the health organisation, require further research. Enquiry into the individualised care perceptions of health care providers and the families of cancer patients would also be useful.
|
|
| 37. |
- Suhonen, R., et al.
(författare)
-
Older cancer patients' perceptions of care guality - an international study
- 2016
-
Ingår i: Journal of Advanced Nursing. - 0309-2402 .- 1365-2648. ; 72:S1, s. 29-29
-
Tidskriftsartikel (refereegranskat)abstract
- Background: Cancer is considered as chronic condition, especially in the older people. Prevalence of cancer is especially high in the Nordic countries and Mediterranean countries. People with cancer are a common patient group in the healthcare system.Introduction: User perspective, such as patient assessments of care and care quality are central in developing healthcare services. These assessments have a high value in time when there are reforms in social and healthcare services. One core principle in these reforms is patient-centeredness. Earlier studies have shown that older patients differ from other age-based patient groups in their assessments of care quality elements. They were reported to be more positive in their evaluations.Aim: The aim of this study was to analyse cancer patients’ perceptions of patient-centered quality and individuality in care and trust in nurses, and to compare these perceptions between patients in the working age and older people. The research questions were: To what extent cancer patients perceive their care is patient-centered quality care, individualised and do they trust in nurses? Are there differences between older cancer patients and those in working age in their perceptions of person-centered quality of care, individuality in care and trust in nurses?Materials and methods: The study employed a cross-sectional comparative survey design. Data were collected using questionnaires among hospitalised cancer patients (N = 876, n = 599, 68%) in four countries: Greece, Cyprus, Sweden and Finland. The following instruments were used: The Oncology Patients perceptions of the Quality of Nursing Care Scale (OPPQNCS), the Individualised care Scale (ICS-patient) and Trust in Nurses. The data were divided into two sub-samples based on age (cut point 65 years): Older patients (n = 209) and patients in the working age (n = 387). Data were analysed statistically using cross-tabulation and chi-square statistics, or paired samples t-test.Results: In this study cancer patients’ perceptions about individualization and coordination of care, support of individuality and perceived individuality in care were only moderate. Proficiency and responsiveness as part of care quality were reported well realised. Trust in nurses was strong. Older patients and those patients in the working age did not differ in their perceptions of either patient-centered quality of care, individualised care or trust in nurses.Conclusions: The results of this study point out topics that need development in order to provide individualised and patient-centered nursing care. Contradictory to many earlier study results, age was not associated with cancer patients’ assessment.
|
|
| 38. |
- Suhonen, R., et al.
(författare)
-
Older cancer patients' perceptions of care guality - an international study
- 2016
-
Ingår i: Journal of Advanced Nursing. - : Wiley-Blackwell Publishing Ltd. - 0309-2402 .- 1365-2648. ; 72:S1, s. 29-29
-
Tidskriftsartikel (refereegranskat)abstract
- Background: Cancer is considered as chronic condition, especially in the older people. Prevalence of cancer is especially high in the Nordic countries and Mediterranean countries. People with cancer are a common patient group in the healthcare system. Introduction: User perspective, such as patient assessments of care and care quality are central in developing healthcare services. These assessments have a high value in time when there are reforms in social and healthcare services. One core principle in these reforms is patient-centeredness. Earlier studies have shown that older patients differ from other age-based patient groups in their assessments of care quality elements. They were reported to be more positive in their evaluations. Aim: The aim of this study was to analyse cancer patients’ perceptions of patient-centered quality and individuality in care and trust in nurses, and to compare these perceptions between patients in the working age and older people. The research questions were: To what extent cancer patients perceive their care is patient-centered quality care, individualised and do they trust in nurses? Are there differences between older cancer patients and those in working age in their perceptions of person-centered quality of care, individuality in care and trust in nurses? Materials and methods: The study employed a cross-sectional comparative survey design. Data were collected using questionnaires among hospitalised cancer patients (N = 876, n = 599, 68%) in four countries: Greece, Cyprus, Sweden and Finland. The following instruments were used: The Oncology Patients perceptions of the Quality of Nursing Care Scale (OPPQNCS), the Individualised care Scale (ICS-patient) and Trust in Nurses. The data were divided into two sub-samples based on age (cut point 65 years): Older patients (n = 209) and patients in the working age (n = 387). Data were analysed statistically using cross-tabulation and chi-square statistics, or paired samples t-test. Results: In this study cancer patients’ perceptions about individualization and coordination of care, support of individuality and perceived individuality in care were only moderate. Proficiency and responsiveness as part of care quality were reported well realised. Trust in nurses was strong. Older patients and those patients in the working age did not differ in their perceptions of either patient-centered quality of care, individualised care or trust in nurses. Conclusions: The results of this study point out topics that need development in order to provide individualised and patient-centered nursing care. Contradictory to many earlier study results, age was not associated with cancer patients’ assessment.
|
|
| 39. |
- Vassiliou, A., et al.
(författare)
-
Towards distributed transmission scheduling for wireless ad hoc networks
- 2012
-
Ingår i: 2012 8th International Wireless Communications And Mobile Computing Conference (IWCMC). - : IEEE. - 9781457713781 ; , s. 1209-1214
-
Konferensbidrag (refereegranskat)abstract
- In this paper we study distributed transmission scheduling via power control in wireless ad hoc networks with multiple channels. The target for each node is to manage to be admitted into a channel from the available channels in the network. The aim of this work is twofold: (a) to determine how a wireless node, based on its limited information, will decide which channel to access and (b), to propose a distributed algorithm for each wireless node with which once the channel is chosen a decision is made whether to stay in the channel or not. Here, we propose an algorithm that, if adopted by all the nodes in the network, it converges to a solution that admits most of the wireless nodes in the network, based on limited information only. Simulations in MATLAB justify the good performance of the algorithm.
|
|
| 40. |
|
|
| 41. |
- Zioutas, K., et al.
(författare)
-
Baryonium physics
- 1983
-
Ingår i: Proceedings of the 1st Hellenic School on Elementary Particle Physics. - : Institution of Electrical Engineers (IEE). ; , s. 437-466
-
Konferensbidrag (refereegranskat)abstract
- Various theoretical ideas on nuclear physics, quark models, and the dual topological unitarization lead to the expectation of massive mesons, called baryonium, coupled strongly to the ppmacr channel but weakly to mesons, thus resulting in a virtually high stability, particularly below the ppmacr threshold. Such states are relevant to nuclear physics owing to the fact that the badly explored short-range forces in the NN interactions are just the most relevant ones in the NNmacr systems. From the known NN potential, one is led to expect short-range attraction in NNmacr systems, and this should result in quasinuclear bound states in the vicinity of threshold.
|
|
| 42. |
- Zou, Zhuo, et al.
(författare)
-
Optimal Radio Frequency Energy Harvesting with Limited Energy Arrival Knowledge
- 2016
-
Ingår i: IEEE Journal on Selected Areas in Communications. - : Institute of Electrical and Electronics Engineers (IEEE). - 0733-8716 .- 1558-0008. ; 34:12, s. 3528-3539
-
Tidskriftsartikel (refereegranskat)abstract
- We develop optimal sleeping and harvesting policies for radio frequency (RF) energy harvesting devices, formalizing the following intuition: when the ambient RF energy is low, devices consume more energy being awake than what can be harvested and should enter sleep mode; when the ambient RF energy is high, on the other hand, it is essential to wake up and harvest. Toward this end, we consider a scenario with intermittent energy arrivals described by a two-state Gilbert-Elliott Markov chain model. The challenge is that the state of the Markov chain can only be observed during the harvesting action, and not while in sleep mode. Two scenarios are studied under this model. In the first scenario, we assume that the transition probabilities of the Markov chain are known and formulate the problem as a partially observable Markov decision process (POMDP). We prove that the optimal policy has a threshold structure and derive the optimal decision parameters. In the practical scenario where the ratio between the reward and the penalty is neither too large nor too small, the POMDP framework and the threshold-based optimal policies are very useful for finding non-Trivial optimal sleeping times. In the second scenario, we assume that the Markov chain parameters are unknown and formulate the problem as a Bayesian adaptive POMDP and propose a heuristic posterior sampling algorithm to reduce the computational complexity. The performance of our approaches is demonstrated via numerical examples.
|
|
| 43. |
- Zvada, Simbarashe P., et al.
(författare)
-
Moxifloxacin Population Pharmacokinetics and Model-Based Comparison of Efficacy between Moxifloxacin and Ofloxacin in African Patients
- 2014
-
Ingår i: Antimicrobial Agents and Chemotherapy. - 0066-4804 .- 1098-6596. ; 58:1, s. 503-510
-
Tidskriftsartikel (refereegranskat)abstract
- Pharmacokinetic exposure and the MIC of fluoroquinolones are important determinants of their efficacy against Mycobacterium tuberculosis. Population modeling was used to describe the steady-state plasma pharmacokinetics of moxifloxacin in 241 tuberculosis (TB) patients in southern Africa. Monte Carlo simulations were applied to obtain the area under the unbound concentration-time curve from 0 to 24 h (fAUC(0-24)) after daily doses of 400 mg or 800 mg moxifloxacin and 800 mg ofloxacin. The MIC distributions of ofloxacin and moxifloxacin were determined for 197 drug-resistant clinical isolates of Mycobacterium tuberculosis. For a specific MIC, the probability of target attainment (PTA) was determined for target fAUC(0-24)/MIC ratios of >= 53 and >= 100. The PTAs were combined with the MIC distributions to calculate the cumulative fraction of response (CFR) for multidrug-resistant (MDR) Mycobacterium tuberculosis strains. Even with the less stringent target ratio of >= 53, moxifloxacin at 400 mg and ofloxacin at 800 mg achieved CFRs of only 84% and 58% for multidrug-resistant isolates with resistance to an injectable drug, while the 800-mg moxifloxacin dose achieved a CFR of 98%. Using a target ratio of >= 100 for multidrug-resistant strains (without resistance to injectable agents or fluoroquinolones), the CFR was 88% for moxifloxacin and only 43% for ofloxacin, and the higher dose of 800 mg moxifloxacin was needed to achieve a CFR target of >90%. Our results indicate that moxifloxacin is more efficacious than ofloxacin in the treatment of MDR-TB. Further studies should determine the optimal pharmacodynamic target for moxifloxacin in a multidrug regimen and clarify safety issues when it is administered at higher doses.
|
|
