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https://www.readbyqxmd.com/read/29347054/chaos-based-wireless-communication-resisting-multipath-effects
#1
Jun-Liang Yao, Chen Li, Hai-Peng Ren, Celso Grebogi
In additive white Gaussian noise channel, chaos has been shown to be the optimal coherent communication waveform in the sense of using a very simple matched filter to maximize the signal-to-noise ratio. Recently, Lyapunov exponent spectrum of the chaotic signals after being transmitted through a wireless channel has been shown to be unaltered, paving the way for wireless communication using chaos. In wireless communication systems, inter-symbol interference caused by multipath propagation is one of the main obstacles to achieve high bit transmission rate and low bit-error rate (BER)...
September 2017: Physical Review. E
https://www.readbyqxmd.com/read/29332182/correction-to-pretreatment-quality-of-life-in-patients-with-rectal-cancer-is-associated-with-intrusive-thoughts-and-sense-of-coherence
#2
Dan Asplund, Thue Bisgaard, David Bock, Jakob Burcharth, Elisabeth González, Eva Haglind, Yanislav Kolev, Peter Matthiessen, Carina Rosander, Jacob Rosenberg, Kenneth Smedh, Marina Åkerblom Sörensson, Eva Angenete
The original version of this article, unfortunately, contained errors.
January 13, 2018: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/29328731/high-resolution-quantum-sensing-with-shaped-control-pulses
#3
J Zopes, K Sasaki, K S Cujia, J M Boss, K Chang, T F Segawa, K M Itoh, C L Degen
We investigate the application of amplitude-shaped control pulses for enhancing the time and frequency resolution of multipulse quantum sensing sequences. Using the electronic spin of a single nitrogen-vacancy center in diamond and up to 10 000 coherent microwave pulses with a cosine square envelope, we demonstrate 0.6-ps timing resolution for the interpulse delay. This represents a refinement by over 3 orders of magnitude compared to the 2-ns hardware sampling. We apply the method for the detection of external ac magnetic fields and nuclear magnetic resonance signals of ^{13}C spins with high spectral resolution...
December 29, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29328307/channel-estimation-for-wideband-underwater-visible-light-communication-a-compressive-sensing-perspective
#4
Xu Ma, Fang Yang, Sicong Liu, Jian Song
With the rapid development of light emitting diode (LED), visible light communication (VLC) becomes an important technique for information transmission including underwater applications. However, accurate channel estimation for underwater VLC is still challenging due to the complex environment of the underwater VLC channel. In this paper, by utilizing a proper approximation, where the channel attenuation is linear with the frequency, a new compressive sensing (CS) based channel estimation approach is proposed...
January 8, 2018: Optics Express
https://www.readbyqxmd.com/read/29320866/paradigm-shift-in-psychiatry-what-may-it-involve
#5
Paul Valent
OBJECTIVE: This study aims to examine the potential nature of an ongoing paradigm shift in psychiatry that has been suggested to be occurring. CONCLUSIONS: New findings in traumatology and neuroscience do form a potential platform for a paradigm shift. Prior conflicting paradigms are suggested to be due to biases arising from mental structures themselves. A new wholist perspective is proposed, which makes sense of and incorporates previous paradigms, and coheres recent understanding of right- and left-brain functioning and biopsychosocial traumatic processes and their ramifications...
January 1, 2018: Australasian Psychiatry: Bulletin of Royal Australian and New Zealand College of Psychiatrists
https://www.readbyqxmd.com/read/29317073/micro-calibration-of-space-and-motion-by-photoreceptors-synchronized-in-parallel-with-cortical-oscillations-a-unified-theory-of-visual-perception
#6
Ravinder Jerath, Shannon M Cearley, Vernon A Barnes, Mike Jensen
A fundamental function of the visual system is detecting motion, yet visual perception is poorly understood. Current research has determined that the retina and ganglion cells elicit responses for motion detection; however, the underlying mechanism for this is incompletely understood. Previously we proposed that retinogeniculo-cortical oscillations and photoreceptors work in parallel to process vision. Here we propose that motion could also be processed within the retina, and not in the brain as current theory suggests...
January 2018: Medical Hypotheses
https://www.readbyqxmd.com/read/29313407/sense-of-coherence-smoking-status-biochemical-cardiovascular-risk-factors-and-body-mass-in-blue-collar-workers-short-report
#7
Anna Najder
The crucial cause of cardiovascular disorders is atherosclerosis developed by abnormal cholesterols levels or disorders affecting blood glucose. One of the best-known cardiovascular risk factors is also tobacco smoking. Simultaneously, sense of coherence (SoC) as a personal resource motivating to managing one's own health behaviors, such as avoiding tobacco smoking, was reported to be protective against coronary heart disease. Such association was observed in white-collar workers but not in blue-collar workers...
January 1, 2018: American Journal of Men's Health
https://www.readbyqxmd.com/read/29286676/enhancing-coherent-light-matter-interactions-through-microcavity-engineered-plasmonic-resonances
#8
Pai Peng, Yong-Chun Liu, Da Xu, Qi-Tao Cao, Guowei Lu, Qihuang Gong, Yun-Feng Xiao
Quantum manipulation is challenging in localized-surface plasmon resonances (LSPRs) due to strong dissipations. To enhance quantum coherence, here we propose to engineer the electromagnetic environment of LSPRs by placing metallic nanoparticles (MNPs) in optical microcavities. An analytical quantum model is first built to describe the LSPR-microcavity interaction, revealing the significantly enhanced coherent radiation and the reduced incoherent dissipation. Furthermore, when a quantum emitter interacts with the LSPRs in the cavity-engineered environment, its quantum yield is enhanced over 40 times and the radiative power over one order of magnitude, compared to those in the vacuum environment...
December 8, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29260889/doctor-patient-relationship-and-quality-of-life-in-irritable-bowel-syndrome-an-exploratory-study-of-the-potential-mediating-role-of-illness-perceptions-and-acceptance
#9
Katrin Hulme, Joseph Chilcot, Michael A Smith
Irritable Bowel Syndrome (IBS) is a functional gastrointestinal disorder characterised by unpredictable bowel symptoms. These can be difficult to manage, consequently impacting quality of life (QoL). In addition, a strained doctor-patient relationship is independently reported in the qualitative literature. Given the doctor is often the first port of call for people with IBS, a difficult relationship may influence subsequent IBS management. Research suggests illness perceptions are important in determining IBS outcomes in therapy; however, their association with doctor-patient relationship and QoL is yet to be investigated...
December 20, 2017: Psychology, Health & Medicine
https://www.readbyqxmd.com/read/29248902/are-sense-of-coherence-and-hope-related-constructs-examining-these-concepts-in-three-cultural-groups-in-israel
#10
Orna Braun-Lewensohn, Sarah Abu-Kaf, Tehila Kalagy
INTRODUCTION: The aim of this study was to evaluate the relationships between two coping factors which facilitate adoptive adjustment when facing stressful situations. We have examined links between sense of coherence (SOC) and the concept of hope as well as its wish and expectation components and its collective and individual dimensions. We have studied three cultural groups in Israel: secular Jews, religious Jews and Bedouin Arabs. METHOD: Data were collected during two military operations (Pillar of Clouds and Protective Edge) from 385 adolescents aged 12-18; 76 secular Jews, 110 religious Jews and 199 Bedouin Arabs...
2017: Israel Journal of Psychiatry and related Sciences
https://www.readbyqxmd.com/read/29245811/coherence-length-gated-distributed-optical-fiber-sensing-based-on-microwave-photonic-interferometry
#11
Liwei Hua, Yang Song, Baokai Cheng, Wenge Zhu, Qi Zhang, Hai Xiao
This paper presents a new optical fiber distributed sensing concept based on coherent microwave-photonics interferometry (CMPI), which uses a microwave modulated coherent light source to interrogate cascaded interferometers for distributed measurement. By scanning the microwave frequencies, the complex microwave spectrum is obtained and converted to time domain signals at known locations by complex Fourier transform. The amplitudes of these time domain pulses are a function of the optical path differences (OPDs) of the distributed interferometers...
December 11, 2017: Optics Express
https://www.readbyqxmd.com/read/29244042/feasibility-and-effects-of-a-nursing-intervention-for-patients-with-peripheral-vestibular-disorders
#12
Carina Faag, Johan Bergenius, Christina Forsberg, Ann Langius-Eklöf
PURPOSE: To explore the feasibility and possible outcomes of a nursing intervention in patients with peripheral vestibular disorders. DESIGN: A randomized controlled trial (RCT). METHODS: Thirty-six patients participated in the study: the intervention group (n = 18), who received the intervention, and patients in a control group (n = 18), who received standard care. The intervention includes patient education and individualized nursing support during a 6-month rehabilitation period...
September 2017: Rehabilitation Nursing: the Official Journal of the Association of Rehabilitation Nurses
https://www.readbyqxmd.com/read/29240086/scintillation-and-bit-error-rate-analysis-of-a-phase-locked-partially-coherent-flat-topped-array-laser-beam-in-oceanic-turbulence
#13
Masoud Yousefi, Fatemeh Dabbagh Kashani, Shole Golmohammady, Ahmad Mashal
In this paper, the performance of underwater wireless optical communication (UWOC) links, which is made up of the partially coherent flat-topped (PCFT) array laser beam, has been investigated in detail. Providing high power, array laser beams are employed to increase the range of UWOC links. For characterization of the effects of oceanic turbulence on the propagation behavior of the considered beam, using the extended Huygens-Fresnel principle, an analytical expression for cross-spectral density matrix elements and a semi-analytical one for fourth-order statistical moment have been derived...
December 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/29238396/-velamente-sailin-in-a-crew-to-improve-self-efficacy-in-people-with-psychosocial-disabilities-a-randomized-controlled-trial
#14
Federica Sancassiani, Alessio Cocco, Giulia Cossu, Stefano Lorrai, Giuseppina Trincas, Francesca Floris, Gisa Mellino, Sergio Machado, Antonio Egidio Nardi, Elisabetta Pascolo Fabrici, Antonello Preti, Mauro Giovanni Carta
Introduction: It has been proposed that sailing can improve quality of life, personal and social skills of people with severe psychosocial disabilities. This study aimed to assess the efficacy of a psychosocial rehabilitative intervention focused on sailing on quality of life, self-efficacy and sense of coherence in people with severe psychosocial disabilities. Methods: The study was a randomized, with parallel groups, waiting-list controlled trial. Participants were 51 people with severe psychosocial disabilities...
2017: Clinical Practice and Epidemiology in Mental Health: CP & EMH
https://www.readbyqxmd.com/read/29237027/poverty-related-diseases-factors-that-predict-coping-in-two-cameroonian-settings
#15
Valerie Makoge, Lette Hogeling, Harro Maat, Lenneke Vaandrager, Maria Koelen
In this paper, we explore the connection between poverty and health (poverty-related diseases: PRDs) by investigating the factors that play a role in how two groups of people in Cameroon cope with health challenges: workers in a large agro-industrial organization (living in 'camps') and students in two major universities (living on 'campuses'). We investigated factors reported in the literature as being associated with coping, summarized under the 'salutogenic umbrella', as well as demographic, social and environmental factors...
December 9, 2017: Health Promotion International
https://www.readbyqxmd.com/read/29229208/assessment-and-treatment-at-a-pain-clinic-a-one-year-follow-up-of-patients-with-chronic-pain
#16
Andrea Hållstam, Monika Löfgren, Lina Benson, Christer Svensén, Britt-Marie Stålnacke
BACKGROUND AND AIMS: Pain is one of the most common reasons for patients to seek primary health care. Pain relief is likely to be achieved for patients suffering from acute pain, but for individuals with chronic pain it is more likely that the condition will persist. These patients have the option of being referred to specialised pain clinics. However, the complexity surrounding chronic pain patients is not well studied in these settings. This study aimed to describe patients with chronic pain referred to a pain clinic by using the information submitted during their first visit and one year later and also to identify associations between baseline characteristics and improvements in health-related quality of life in the follow-up...
October 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29219967/primordial-clays-on-mars-formed-beneath-a-steam-or-supercritical-atmosphere
#17
Kevin M Cannon, Stephen W Parman, John F Mustard
On Mars, clay minerals are widespread in terrains that date back to the Noachian period (4.1 billion to 3.7 billion years ago). It is thought that the Martian basaltic crust reacted with liquid water during this time to form hydrated clay minerals. Here we propose, however, that a substantial proportion of these clays was formed when Mars' primary crust reacted with a dense steam or supercritical atmosphere of water and carbon dioxide that was outgassed during magma ocean cooling. We present experimental evidence that shows rapid clay formation under conditions that would have been present at the base of such an atmosphere and also deeper in the porous crust...
December 6, 2017: Nature
https://www.readbyqxmd.com/read/29216147/wide-field-interferometric-measurement-of-a-nonstationary-complex-coherence-function
#18
Roxana Rezvani Naraghi, Heath Gemar, Mahed Batarseh, Andre Beckus, George Atia, Sergey Sukhov, Aristide Dogariu
Spatial coherence function (SCF) is a complex function of two spatial coordinates that, in general, carries more information than the bare intensity distribution. A fast and quantitatively accurate measurement of the SCF is extremely important for a range of applications in optical sensing and imaging. Here, we demonstrate an efficient two-step procedure for measuring the full-field complex coherence function. The measurement relies on an optimized design of a wavefront shearing interferometer capable of characterizing spatially inhomogeneous fields over an extended angular domain...
December 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/29215144/physiological-coherence-in-healthy-volunteers-during-laboratory-induced-stress-and-controlled-breathing
#19
Elisa Mejía-Mejía, Robinson Torres, Diana Restrepo
Physiological coherence has been related with a general sense of well-being and improvements in health and physical, social, and cognitive performance. The aim of this study was to evaluate the relationship between acute stress, controlled breathing, and physiological coherence, and the degree of body systems synchronization during a coherence-generation exercise. Thirty-four university employees were evaluated during a 20-min test consisting of four stages of 5-min duration each, during which basal measurements were obtained (Stage 1), acute stress was induced using validated mental stressors (Stroop test and mental arithmetic task, during Stage 2 and 3, respectively), and coherence states were generated using a controlled breathing technique (Stage 4)...
December 7, 2017: Psychophysiology
https://www.readbyqxmd.com/read/29212539/the-relationships-between-the-combination-of-person-and-organization-related-conditions-and-patients-perceptions-of-palliative-care-quality
#20
Tuva Sandsdalen, Sevald Høye, Ingrid Rystedt, Vigdis Abrahamsen Grøndahl, Reidun Hov, Bodil Wilde-Larsson
BACKGROUND: Little is known about the combination of person- and organization- related conditions and the relationships with patients' perspectives of care quality. Such a combination could contribute knowledge reflecting the complexity of clinical practice, and enhance individualized care. The aim was to investigate the relationships between the combination of person- and organization-related conditions and patients' perceptions of palliative care quality. METHODS: A cross-sectional study, including 191 patients in the late palliative phase (73% response rate) admitted to hospice inpatient care (n = 72), hospice day care (n = 51), palliative units in nursing homes (n = 30) and home care (n = 38), was conducted between November 2013 and December 2014, using the instrument Quality from the Patients' Perspective specific to palliative care (QPP-PC)...
December 6, 2017: BMC Palliative Care
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