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Squaring the circle

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https://www.readbyqxmd.com/read/28737930/self-collapse-lithography
#1
Chuanzhen Zhao, Xiaobin Xu, Qing Yang, Tianxing Man, Steven Jonas, Jeffrey J Schwartz, Anne M Andrews, Paul S Weiss
We report a facile, high-throughput soft lithography process that utilizes nanoscale channels formed naturally at the edges of microscale relief features on soft, elastomeric stamps. Upon contact with self-assembled monolayer (SAM) functionalized substrates, the roof of the stamp collapses, resulting in the selective removal of SAM molecules via a chemical lift-off process. With this technique, which we call self-collapse lithography (SCL), sub-30-nm patterns were achieved readily using masters with microscale features prepared by conventional photolithography...
July 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28724444/adaptation-effects-in-static-postural-control-by-providing-simultaneous-visual-feedback-of-center-of-pressure-and-center-of-gravity
#2
Kenta Takeda, Hiroki Mani, Naoya Hasegawa, Yuki Sato, Shintaro Tanaka, Hiroshi Maejima, Tadayoshi Asaka
BACKGROUND: The benefit of visual feedback of the center of pressure (COP) on quiet standing is still debatable. This study aimed to investigate the adaptation effects of visual feedback training using both the COP and center of gravity (COG) during quiet standing. METHODS: Thirty-four healthy young adults were divided into three groups randomly (COP + COG, COP, and control groups). A force plate was used to calculate the coordinates of the COP in the anteroposterior (COPAP) and mediolateral (COPML) directions...
July 19, 2017: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/28707348/regulation-of-cell-arrangement-using-a-novel-composite-micropattern
#3
Xiaoyi Liu, Yaoping Liu, Feng Zhao, Tingting Hun, Shan Li, Yuguang Wang, Weijie Sun, Wei Wang, Yan Sun, Yubo Fan
Micropatterning technique has been used to control single cell geometry in many researches, however, this is no report that it is used to control multicelluar geometry, which not only control single cell geometry but also organize those cells by a certain pattern. In this work, a composite protein micropattern is developed to control both cell shape and cell location simultaneously. The composite micropattern consists of a central circle 15 μm in diameter for single-cell capture, surrounded by small, square arrays (3 μm × 3 μm) for cell spreading...
July 13, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28700499/cerebrovascular-risk-factors-for-patients-with-cerebral-watershed-infarction-a-case-control-study-based-on-computed-tomography-angiography-in-a-population-from-southwest-china
#4
Mei-Xue Dong, Ling Hu, Yuan-Jun Huang, Xiao-Min Xu, Yang Liu, You-Dong Wei
To determine cerebrovascular risk factors for patients with cerebral watershed infarction (CWI) from Southwest China.Patients suffering from acute ischemic stroke were categorized into internal CWI (I-CWI), external CWI (E-CWI), or non-CWI (patients without CWI) groups. Clinical data were collected and degrees of steno-occlusion of all cerebral arteries were scored. Arteries associated with the circle of Willis were also assessed. Data were compared using Pearson chi-squared tests for categorical data and 1-way analysis of variance with Bonferroni post hoc tests for continuous data, as appropriate...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28637337/matrix-completion-with-side-information-and-its-applications-in-predicting-the-antigenicity-of-influenza-viruses
#5
Li Huang, Xianhong Li, Pengfei Guo, Yuhua Yao, Bo Liao, Weiwei Zhang, Fayou Wang, Jiasheng Yang, Yulong Zhao, Hailiang Sun, Pingan He, Jialiang Yang
Motivation: Low-rank matrix completion has been demonstrated to be powerful in predicting antigenic distances among influenza viruses and vaccines from partially revealed hemagglutination inhibition (HI) table. Meanwhile, influenza hemagglutinin (HA) protein sequences are also effective in inferring antigenic distances. Thus, it is natural to integrate HA protein sequence information into low-rank matrix completion model to help infer influenza antigenicity, which is critical to influenza vaccine development...
June 16, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28602330/mean-shape-of-the-human-limbus
#6
Alejandra Consejo, Clara Llorens-Quintana, Hema Radhakrishnan, D Robert Iskander
PURPOSE: To characterize the mean topographic shape of the limbus of a normal human eye and determine whether it depends on age or refractive power. SETTING: University of Manchester, Manchester, United Kingdom. DESIGN: Prospective case series. METHODS: Participants with no previous ocular surgeries were included in this study. The left eye was measured with a corneoscleral topographer (Eye Surface Profiler). From the raw anterior eye height data, the topographic limbus was demarcated and fitted in 3 dimensions to a circle, an ellipse, and a Fourier series...
May 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28593085/postural-stability-and-kinetic-change-in-subjects-with-patellofemoral-pain-after-a-nine-week-hip-and-core-strengthening-intervention
#7
Patrick M Carry, Raj Gala, Kate Worster, Susan Kanai, Nancy H Miller, David James, Aaron J Provance, James J Carollo
BACKGROUND: Idiopathic patellofemoral pain (PFP) has been linked to hip weakness and abnormal lower extremity mechanics. The effect of a strengthening intervention on balance has not been well studied among individuals with PFP. HYPOTHESIS/PURPOSE: The primary aim of this study was to evaluate changes in center of pressure displacement during the single limb squat following a nine-week physical therapy intervention among adolescent females with PFP. STUDY DESIGN: Interventional and cross-sectional...
June 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28557568/a-grid-based-nucleus-counting-method-for-estimates-of-the-density-of-superficial-conjunctival-cells-from-impression-cytology-samples-taken-from-normal-healthy-human-eyes
#8
Michael J Doughty
PURPOSE: To develop and validate an easily procured objective estimate of the cell density of the superficial epithelial cells of the normal bulbar conjunctiva using conjunctival impression cytology (CIC). METHODS: From 20 healthy non-contact lens-wearing young adults, CIC was undertaken off the nasal aspect of the exposed bulbar conjunctiva, the filters stained with Giemsa, and images taken at 200× that only included an all-but-contiguous monolayer of epithelial cells...
May 30, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28447826/the-role-of-expectations-and-habitual-emotion-regulation-in-emotional-processing-an-erp-investigation
#9
Emily G Brudner, Ekaterina Denkova, Martin Paczynski, Amishi P Jha
Available evidence from separate lines of event-related potential (ERP) research has highlighted the role of expectations and emotion regulation on emotional processing by revealing that (i) expectations can alter emotional responses, and (ii) the instructed use of emotion regulation strategies may modulate emotional responses. Yet, little is known about the interplay between expectations and habitual emotion regulation strategies prior to and at the onset of an emotional event. The present study aimed to investigate this potential relationship...
April 27, 2017: Emotion
https://www.readbyqxmd.com/read/28394391/refinement-of-insulator-based-dielectrophoresis
#10
Claire V Crowther, Mark A Hayes
The ability to separate analytes with increasingly similar properties drives the field of separation science. One way to achieve such separations is using trapping and streaming dielectrophoresis (DEP), which directly exploits the subtle differences in the electrophysical properties of analytes. The non-uniform fields necessary for DEP can be formed using various insulator shapes in microchannels. Current insulator shapes include triangles, diamonds, circles, and rectangles. However, all of these insulators pose problems for trapping, streaming, and sorting (deflection) as the induced fields/gradients are not behaviorally consistent across the lateral dimension...
May 2, 2017: Analyst
https://www.readbyqxmd.com/read/28387731/a-novel-robust-trilateration-method-applied-to-ultra-wide-bandwidth-location-systems
#11
Jiahong Li, Xianghu Yue, Jie Chen, Fang Deng
Due to the non-line-of-sight (NLOS) and multipath fading channel (MPF) of the wireless networks, the non-existence of the intersection point often occurs in the range-based localization methods, e.g., the centroid-based trilateration method. To alleviate the problem, a confidence-based intersection method which expands the range of the circle within a certain confidence interval is proposed. In the method, the confidence interval is estimated based on the Cramér-Rao lower bound of the time of flight (TOF) measurement...
April 7, 2017: Sensors
https://www.readbyqxmd.com/read/28375280/strehl-ratio-and-amplitude-weighted-generalized-orthonormal-zernike-based-polynomials
#12
Cosmas Mafusire, Tjaart P J Krüger
The concept of orthonormal polynomials is revisited by developing a Zernike-based orthonormal set for a non-circular pupil that is transmitting an aberrated, non-uniform field. We refer to this pupil as a general pupil. The process is achieved by using the matrix form of the Gram-Schmidt procedure on Zernike circle polynomials and is interpreted as a process of balancing each Zernike circle polynomial by adding those of lower order in the general pupil, a procedure which was previously performed using classical aberrations...
March 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/28321797/self-relevance-effects-and-label-choice-strong-variations-in-label-matching-performance-due-to-non-self-relevant-factors
#13
Gregory L Wade, Timothy J Vickery
Merely associating one's self with a stimulus may be enough to enhance performance in a label-matching paradigm (Sui, He, & Humphreys, 2012), implying prioritized processing of self-relevant stimuli. For instance, labeling a square as SELF and a circle as OTHER yields speeded performance when verifying square-SELF compared with circle-OTHER label matches. The precise causes of such effects are unclear. We propose that prioritized processing of label-matches can occur for reasons other than self-relevance. Here, we employ the label-matching paradigm to show similar benefits for non-self-relevant labels (SNAKE, FROG, and GREG) over a frequently employed, non-self-relevant control label (OTHER)...
March 20, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28297979/brownian-motion-of-a-circle-swimmer-in-a-harmonic-trap
#14
Soudeh Jahanshahi, Hartmut Löwen, Borge Ten Hagen
We study the dynamics of a Brownian circle swimmer with a time-dependent self-propulsion velocity in an external temporally varying harmonic potential. For several situations, the noise-free swimming paths, the noise-averaged mean trajectories, and the mean-square displacements are calculated analytically or by computer simulation. Based on our results, we discuss optimal swimming strategies in order to explore a maximum spatial range around the trap center. In particular, we find a resonance situation for the maximum escape distance as a function of the various frequencies in the system...
February 2017: Physical Review. E
https://www.readbyqxmd.com/read/28273817/study-on-the-deformation-measurement-of-the-cast-in-place-large-diameter-pile-using-fiber-bragg-grating-sensors
#15
Lei Gao, Kai Yang, Xiaorui Chen, Xiangjuan Yu
Compared with conventional piles such as the circle pile, the cast-in-place large-diameter pile (PCC pile) has many advantages: the lateral area of PCC pile is larger and the bearing capacity of PCC pile is higher. It is more cost-effective than other piles such as square pile under the same condition. The deformation of the PCC pile is very important for its application. In order to obtain the deformation of the PCC pile, a new type of quasi-distributed optical fiber sensing technology named a fiber Bragg grating (FBG) is used to monitor the deformation of the PCC pile...
March 3, 2017: Sensors
https://www.readbyqxmd.com/read/28249513/angles-centroids-fitting-calibration-and-the-centroid-algorithm-applied-to-reverse-hartmann-test
#16
Zhu Zhao, Mei Hui, Zhengzheng Xia, Liquan Dong, Ming Liu, Xiaohua Liu, Lingqin Kong, Yuejin Zhao
In this paper, we develop an angles-centroids fitting (ACF) system and the centroid algorithm to calibrate the reverse Hartmann test (RHT) with sufficient precision. The essence of ACF calibration is to establish the relationship between ray angles and detector coordinates. Centroids computation is used to find correspondences between the rays of datum marks and detector pixels. Here, the point spread function of RHT is classified as circle of confusion (CoC), and the fitting of a CoC spot with 2D Gaussian profile to identify the centroid forms the basis of the centroid algorithm...
February 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28228342/evaluation-of-the-implementation-of-the-south-african-triage-system-at-an-academic-hospital-in-central-haiti
#17
Shada A Rouhani, Emily Aaronson, Angella Jacques, Sandy Brice, Regan H Marsh
BACKGROUND: Effective triage is an important part of high quality emergency care, yet is frequently lacking in resource-limited settings. The South African Triage Scale (SATS) is designed for these settings and consists of a numeric score (triage early warning score, TEWS) and a list of clinical signs (known as discriminators). Our objective was to evaluate the implementation of SATS at a new teaching hospital in Haiti. METHODS: A random sample of emergency department charts from October 2013 were retrospectively reviewed for the completeness and accuracy of the triage form, correct calculation of the triage score, and final patient disposition...
February 19, 2017: International Emergency Nursing
https://www.readbyqxmd.com/read/28207758/an-improved-schlieren-method-for-measurement-and-automatic-reconstruction-of-the-far-field-focal-spot
#18
Zhengzhou Wang, Bingliang Hu, Qinye Yin
The schlieren method of measuring far-field focal spots offers many advantages at the Shenguang III laser facility such as low cost and automatic laser-path collimation. However, current methods of far-field focal spot measurement often suffer from low precision and efficiency when the final focal spot is merged manually, thereby reducing the accuracy of reconstruction. In this paper, we introduce an improved schlieren method to construct the high dynamic-range image of far-field focal spots and improve the reconstruction accuracy and efficiency...
2017: PloS One
https://www.readbyqxmd.com/read/28193601/squaring-the-circle-health-as-a-bridge-to-global-solidarity-in-the-sustainable-development-goals
#19
B Williams, S Taylor
The Sustainable Development Goals (SDGs), launched in September 2015 to follow on from the Millennium Development Goals, require action by all countries. The new goals range from traditional areas of health and education to a newer focus on global trade and environmental protection. We discuss how all countries can be incentivised to engage and commit and argue that thoughtful target-setting and benchmarking, a more aggressive focus on equity and an emphasis on the interdependence of health and non-health development goals are key to meaningful progress...
May 2017: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/28158675/trying-to-square-the-circle-integration-of-computed-tomography-data-for-the-evaluation-of-mitral-regurgitation
#20
Jan-Malte Sinning
No abstract text is available yet for this article.
February 3, 2017: European Heart Journal
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