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https://www.readbyqxmd.com/read/28438002/hot-luminescence-from-gold-nanoflowers-and-its-application-in-high-density-optical-data-storage
#1
Yunbao Zheng, Haiying Liu, Jin Xiang, Qiaofeng Dai, Min Ouyang, Shaolong Tie, Sheng Lan
Gold nanoflowers with feature sizes ranging from several tenths to several hundred nanometers were synthesized by using the one-pot method. They were formed by the self-organization of gold nanoparticles of several nanometers and exhibited broad extinction spectra in the near infrared spectral range. Randomly distributed hot spots originating from the strongly localized modes were generated in gold nanoflowers and their appearances exhibited strong dependences on both the polarization and wavelength of the excitation light...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437986/control-and-design-heat-flux-bending-in-thermal-devices-with-transformation-optics
#2
Guoqiang Xu, Haochun Zhang, Yan Jin, Sen Li, Yao Li
We propose a fundamental latent function of control heat transfer and heat flux density vectors at random positions on thermal materials by applying transformation optics. The expressions for heat flux bending are obtained, and the factors influencing them are investigated in both 2D and 3D cloaking schemes. Under certain conditions, more than one degree of freedom of heat flux bending exists corresponding to the temperature gradients of the 3D domain. The heat flux path can be controlled in random space based on the geometrical azimuths, radial positions, and thermal conductivity ratios of the selected materials...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437961/novel-asymmetric-cryptosystem-based-on-distorted-wavefront-beam-illumination-and-double-random-phase-encoding
#3
Honghao Yu, Jun Chang, Xin Liu, Chuhan Wu, Yifan He, Yongjian Zhang
Herein, we propose a new security enhancing method that employs wavefront aberrations as optical keys to improve the resistance capabilities of conventional double-random phase encoding (DRPE) optical cryptosystems. This study has two main innovations. First, we exploit a special beam-expander afocal-reflecting to produce different types of aberrations, and the wavefront distortion can be altered by changing the shape of the afocal-reflecting system using a deformable mirror. Then, we reconstruct the wavefront aberrations via the surface fitting of Zernike polynomials and use the reconstructed aberrations as novel asymmetric vector keys...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437946/cyphertext-only-attack-on-the-double-random-phase-encryption-experimental-demonstration
#4
Guowei Li, Wanqin Yang, Dayan Li, Guohai Situ
We demonstrate experimentally that the traditional double random phase encoding (DPRE) technique is vulnerable to the cyphertext-only attack (COA). With the statistical ergodic property of the speckle, we show that the plaintext image can be recovered from the cyphertext alone owing to the fact that their energy spectral density functions are identical. Our result reveals the most serious security issue with the DRPE as it suggests that even the one-time-pad does not guarantee its security. This will open up new inside understanding of current optical security techniques...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437943/power-allocation-for-uniform-illumination-with-stochastic-led-arrays
#5
G V S S Praneeth Varma, Rayapati Sushma, Vandana Sharma, Abhinav Kumar, G V V Sharma
In this paper, a simple heuristic power allocation scheme is proposed for a random LED array to obtain uniform irradiance on the projection surface. This is done by considering a binomial point process (BPP) for modeling the LED location and using the quality factor as a performance metric. Numerical results are provided to validate the proposed model and demonstrate its simplicity over existing LED geometries.
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437928/terahertz-optical-bistability-of-graphene-in-thin-layers-of-dielectrics
#6
Kwang Jun Ahn, Fabian Rotermund
We theoretically studied in terahertz frequency regime optical bistability of graphene placed at the interface between thin dielectric layers. We solved self-consistently the nonlinear wave equations containing the third-order optical conductivity of graphene in four-layer structures and obtained hysteresis response of the transmitted power as a function of the incident power. We numerically observed that the critical powers for the up and down transitions and the Fermi-energy of graphene required for terahertz optical bistability can be reduced by carefully choosing material properties and the thicknesses of dielectric layers...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437890/does-propolis-have-any-effect-on-non-alcoholic-fatty-liver-disease
#7
Kemal Kismet, Cigdem Ozcan, Serdar Kuru, Omur Gencay Celemli, Pinar Celepli, Mehmet Senes, Tuncay Guclu, Kadriye Sorkun, Sema Hucumenoglu, Tanju Besler
The aim of this study was to evaluate the therapeutic effect of propolis on non-alcoholic fatty liver disease (NAFLD) in rats. The rats were randomly divided into 3 groups of 10 as the NAFLD, NAFLD+100 and NAFLD+200 groups. The rats were fed with a fatty diet (25g/kg/day) to provoke NAFLD. Then after the formation of fatty liver, a standard diet (SD) (25g/kg/day) was given to the NAFLD group and the other two groups were fed with SD and 100mg/kg (NAFLD+100 Group) or 200mg/kg propolis (NAFLD+200 Group) for two weeks...
April 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28437867/robustness-assessment-of-urban-road-network-with-consideration-of-multiple-hazard-events
#8
Yaoming Zhou, Jiuh-Biing Sheu, Junwei Wang
Robustness measures a system's ability of being insensitive to disturbances. Previous studies assessed the robustness of transportation networks to a single disturbance without considering simultaneously happening multiple events. The purpose of this article is to address this problem and propose a new framework to assess the robustness of an urban transportation network. The framework consists of two layers. The upper layer is to define the robustness index based on the impact evaluation in different scenarios obtained from the lower layer, whereas the lower layer is to evaluate the performance of each hypothetical disrupted road network given by the upper layer...
April 24, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28437854/is-there-sufficient-evidence-for-a-causal-association-between-antiretroviral-therapy-and-diabetes-in-hiv-infected-patients-a-meta-analysis
#9
REVIEW
Chidozie U Nduka, Saverio Stranges, Peter K Kimani, Ahmed M Sarki, Olalekan A Uthman
BACKGROUND: The association of antiretroviral therapy (ART) with diabetes is inconsistent and varies widely across primary epidemiological studies. A comprehensive and more precise estimate of this association is fundamental to establishing a plausible causal link between ART and diabetes. METHODS: We identified epidemiological studies that compared mean fasting plasma glucose (FPG) concentrations and proportions of diabetes and metabolic syndrome between HIV-infected patients naïve and exposed to ART...
April 24, 2017: Diabetes/metabolism Research and Reviews
https://www.readbyqxmd.com/read/28437821/-rapid-cycling-in-bipolar-disorders-symptoms-%C3%A2-background%C3%A2-and-treatment-recommendations
#10
Stephan Köhler, Eva Friedel, Thomas Stamm
Rapid cycling bipolar disorder is encountered frequently in clinical practice with a lifetime prevalence of up to 31 %. Besides its association with greater illness severity, increased suicide and comorbidity rates, rapid cycling bipolar disorder has been closely associated with a longer and more complicated course of disease and inadequate treatment response compared to non-rapid cycling bipolar disorder. However rapid cycling does not serve as a stable characteristic of bipolar disorder, though its prevalence increases with illness duration...
April 2017: Fortschritte der Neurologie-Psychiatrie
https://www.readbyqxmd.com/read/28437795/effect-of-using-the-heart-score-in-patients-with-chest-pain-in-the-emergency-department-a-stepped-wedge-cluster-randomized-trial
#11
Judith M Poldervaart, Johannes B Reitsma, Barbra E Backus, Hendrik Koffijberg, Rolf F Veldkamp, Monique E Ten Haaf, Yolande Appelman, Herman F J Mannaerts, Jan-Melle van Dantzig, Madelon van den Heuvel, Mohamed El Farissi, Bernard J W M Rensing, Nicolette M S K J Ernst, Ineke M C Dekker, Frank R den Hartog, Thomas Oosterhof, Ghizelda R Lagerweij, Eugene M Buijs, Maarten W J van Hessen, Marcel A J Landman, Roland R J van Kimmenade, Luc Cozijnsen, Jeroen J J Bucx, Clara E E van Ofwegen-Hanekamp, Maarten-Jan Cramer, A Jacob Six, Pieter A Doevendans, Arno W Hoes
Background: The HEART (History, Electrocardiogram, Age, Risk factors, and initial Troponin) score is an easy-to-apply instrument to stratify patients with chest pain according to their short-term risk for major adverse cardiac events (MACEs), but its effect on daily practice is unknown. Objective: To measure the effect of use of the HEART score on patient outcomes and use of health care resources. Design: Stepped-wedge, cluster randomized trial...
April 25, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28437793/mindfulness-based-stress-reduction-for-treating-low-back-pain-a-systematic-review-and-meta-analysis
#12
Dennis Anheyer, Heidemarie Haller, Jürgen Barth, Romy Lauche, Gustav Dobos, Holger Cramer
Background: Mindfulness-based stress reduction (MBSR) is frequently used to treat pain-related conditions, but its effects on low back pain are uncertain. Purpose: To assess the efficacy and safety of MBSR in patients with low back pain. Data Sources: Searches of MEDLINE/PubMed, Scopus, the Cochrane Library, and PsycINFO to 15 June 2016. Study Selection: Randomized controlled trials (RCTs) that compared MBSR with usual care or an active comparator and assessed pain intensity or pain-related disability as a primary outcome in patients with low back pain...
April 25, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28437787/a-comparison-of-three-different-volumes-of-levobupivacaine-for-caudal-block-in-children-undergoing-orchidopexy-and-inguinal-hernia-repair
#13
Vesna Marjanovic, Ivana Budic, Marija Stevic, Dusica Simic
OBJECTIVE: The aim of this study was to compare the efficacy of three different volumes of 0.25% levobupivacaine caudally administered on the effect of intra- and post-operative analgesia in children undergoing orchidopexy and inguinal hernia repair. SUBJECTS AND METHODS: Forty children, aged 1 to 7 years, American Society of Anesthesiologists (ASA) physical status I and II, were randomized into 3 different groups according to the applied volumes of 0.25% levobupivacaine: group 1 (n=13): 0...
April 23, 2017: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
https://www.readbyqxmd.com/read/28437702/cascade-post-polymerization-modification-of-single-pentafluorophenyl-ester-bearing-homopolymer-as-a-facile-route-to-redox-responsive-nanogels
#14
Susita Noree, Varawut Tangpasuthadol, Suda Kiatkamjornwong, Voravee P Hoven
Poly(pentafluorophenyl methacrylate) (PPFPMA) was first subjected to post-polymerization modification with oligo(ethylene glycol) methyl ether amine (OEG-NH2) and yielded poly(pentafluorophenyl methacrylate)-co-poly(oligo(ethylene glycol methacrylamide)), PPFPMA-co-POEGMAM. These amphiphilic random copolymers can self-assemble into micellar nanoparticles in water having sizes less than 100nm. By tandemly reacting the pentafluorophenyl (PFP) groups in the copolymeric nanoparticles with a dithiol crosslinker, cystamine, redox-responsive nanogels can be formed...
April 12, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28437612/combinatorial-library-based-on-restriction-enzyme-mediated-modular-assembly
#15
Cuiping Ma, Chao Liang, Yifan Wang, Mei Pan, Qianqian Jiang, Chao Shi
Combinatorial approaches in directed evolution were proven to be more efficient for exploring sequence space and innovating the function of protein. We presented modular assembly of secondary structures (MASS) for constructing a combinatorial library. In this approach, secondary structure elements were extracted from natural existing proteins, the common linkers were flanking secondary structure elements, then digested by Hinf I restriction endonuclease that was used in the construction of combinatorial library for the first time...
April 24, 2017: ACS Combinatorial Science
https://www.readbyqxmd.com/read/28437600/how-are-behavioral-theories-used-in-interventions-to-promote-physical-activity-in-rheumatoid-arthritis-a-systematic-review
#16
Ingrid Demmelmaier, Maura D Iversen
OBJECTIVES: To identify the use of behavioral theories (BTs) in physical activity (PA) interventions in populations with RA. METHODS: This review includes articles published in English between 01-01-1980 and 08-12-2015 in MEDLINE, Cochrane and CINAHL identified by a strategic literature search. Included studies were: published in international peer-reviewed journals; mentioned "theory", evaluated a PA intervention for adults with RA; and had ≥ 1 PA variable as the outcome...
April 24, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28437597/weight-loss-in-weight-watchers-online-with-and-without-an-activity-tracking-device-compared-to-control-a-randomized-trial
#17
J Graham Thomas, Hollie A Raynor, Dale S Bond, Anna K Luke, Chelsi C Cardoso, Gary D Foster, Rena R Wing
OBJECTIVE: To evaluate a commercial online weight loss program and activity tracker, which are popular but have unknown efficacy. METHODS: Two hundred seventy-nine participants with BMI 27 to 40 kg/m(2) were randomized to 12 months of the Weight Watchers Online program alone (WWO) or with the ActiveLink(®) activity tracking device (WWO+AL) or an online newsletter (Control). RESULTS: Weight losses at 3 months were significantly greater in WWO (2...
April 24, 2017: Obesity
https://www.readbyqxmd.com/read/28437574/dietary-lactalbumin-and-lactoferrin-interact-with-inulin-to-modulate-energy-balance-in-obese-rats
#18
Arashdeep Singh, Rizaldy C Zapata, Adel Pezeshki, Prasanth K Chelikani
OBJECTIVE: To determine whether diets enriched with the whey protein components lactalbumin and lactoferrin interact additively with inulin to improve energy balance by decreasing food intake and body weight (BW). METHODS: In four experiments, diet-induced obese rats were randomized to diets containing either lactalbumin or lactoferrin at low (20% kcal) or high (40% kcal) doses, and inulin at low (7.5% w/w) or high (15% w/w) doses, alone or in combination. Energy intake (EI), energy expenditure (EE), respiratory quotient (RQ), BW, body composition, plasma insulin, and leptin concentrations were measured...
April 24, 2017: Obesity
https://www.readbyqxmd.com/read/28437570/self-acupressure-for-older-adults-with-symptomatic-knee-osteoarthritis-a-randomized-controlled-trial
#19
Lydia W Li, Richard E Harris, Alex Tsodikov, Laura Struble, Susan L Murphy ScD
OBJECTIVES: This double-blind RCT aimed to test the efficacy of self-administered acupressure for pain and physical function improvement for older adults with knee osteoarthritis (KOA). METHODS: Community-living adults with symptomatic KOA (N=150; mean age=73) participated and were randomized to verum acupressure, sham acupressure, or usual care. Verum and sham, but not usual care, participants were taught to self-apply acupressure once daily, five days/week for eight weeks...
April 24, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28437565/relaxed-ordered-subset-preconditioned-alternating-projection-algorithm-for-pet-reconstruction-with-automated-penalty-weight-selection
#20
C Ross Schmidtlein, Yizun Lin, Si Li, Andrzej Krol, Bradley J Beattie, John L Humm, Yuesheng Xu
PURPOSE: Performance of the preconditioned alternating projection algorithm (PAPA) using relaxed ordered subsets (ROS) with a non-smooth penalty function was investigated in positron emission tomography (PET). A higher order total variation (HOTV) regularizer was applied and a method for unsupervised selection of penalty weights based on the measured data is introduced. METHODS: A ROS version of PAPA with HOTV penalty (ROS-HOTV-PAPA) for PET image reconstruction was developed and implemented...
April 24, 2017: Medical Physics
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