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https://www.readbyqxmd.com/read/28468372/high-precision-system-modeling-of-liquid-crystal-adaptive-optics-systems
#1
Xingyun Zhang, Zhaoliang Cao, Huanyu Xu, Yukun Wang, Dayu Li, Shaoxin Wang, Chengliang Yang, Quanquan Mu, Li Xuan
In this paper, we present a heuristic method to simplify the liquid crystal adaptive optics system (LCAOS) into a single-input-single-output (SISO) system, then build the dynamic model of LCAOS based on subspace identification. Results show that the identified model could accurately describe the dynamical behavior of LCAOS (97% match), with extremely low complexity. The wonderful features of low complexity and high precision, make the identified model highly beneficial for model based controller design, system analysis and dynamical behavior simulation of liquid crystal adaptive optics systems...
May 1, 2017: Optics Express
https://www.readbyqxmd.com/read/28454643/the-application-of-fractional-order-control-for-an-air-based-contactless-actuation-system
#2
Martijn E Krijnen, Ron A J van Ostayen, Hassan HosseinNia
Industry pushes towards ever faster and more accurate production of thin substrates. Contactless positioning offers advantages, especially in terms of risk of breakage and contamination. A system is considered designed for contactless positioning by floating a silicon wafer on a thin film of air. This paper focuses on the design of a control system, including actuators, sensors and control method, suitable for this purpose. Two cascaded control loops, with decoupled SISO controllers, are implemented for this moving mass controlled on a mass-spring system, which can be modelled as a fourth order system...
April 25, 2017: ISA Transactions
https://www.readbyqxmd.com/read/28453577/abdominal-aortic-aneurysm-screening-program-using-hand-held-ultrasound-in-primary-healthcare
#3
Antoni Sisó-Almirall, Belchin Kostov, Marta Navarro González, Daniel Cararach Salami, Alfonso Pérez Jiménez, Rosa Gilabert Solé, Concepció Bru Saumell, Lluís Donoso Bach, Mireia Villalta Martí, Luis González-de Paz, Rafael Ruiz Riera, Vicenç Riambau Alonso, Nihan Acar-Denizli, Marta Farré Almacellas, Manuel Ramos-Casals, Jaume Benavent Àreu
We determined the feasibility of abdominal aortic aneurysm (AAA) screening program led by family physicians in public primary healthcare setting using hand-held ultrasound device. The potential study population was 11,214 men aged ≥ 60 years attended by three urban, public primary healthcare centers. Participants were recruited by randomly-selected telephone calls. Ultrasound examinations were performed by four trained family physicians with a hand-held ultrasound device (Vscan®). AAA observed were verified by confirmatory imaging using standard ultrasound or computed tomography...
2017: PloS One
https://www.readbyqxmd.com/read/28421101/hyperspectral-technologies-for-assessing-seed-germination-and-trifloxysulfuron-methyl-response-in-amaranthus-palmeri-palmer-amaranth
#4
Maor Matzrafi, Ittai Herrmann, Christian Nansen, Tom Kliper, Yotam Zait, Timea Ignat, Dana Siso, Baruch Rubin, Arnon Karnieli, Hanan Eizenberg
Weed infestations in agricultural systems constitute a serious challenge to agricultural sustainability and food security worldwide. Amaranthus palmeri S. Watson (Palmer amaranth) is one of the most noxious weeds causing significant yield reductions in various crops. The ability to estimate seed viability and herbicide susceptibility is a key factor in the development of a long-term management strategy, particularly since the misuse of herbicides is driving the evolution of herbicide response in various weed species...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28416363/-adequacy-of-treatment-for-osteoporosis-in-primary-prevention-quantitative-and-qualitative-study
#5
Cristina Vedia Urgell, Mireia Massot Mesquida, Roser Valles Fernandez, Juan Antonio Garcia Vicente, Alicia Franzi Siso, Laura Muñoz Ortiz, Laia Vilaró Jaques, Maite Bosch Peligero
OBJECTIVE: Quantitative study: To assess the prevalence of inadequacy of treatment for osteoporosis in primary prevention (OPP) in women aged 60-74years. Qualitative study: To evaluate the diagnostic and treatment criteria of the OPP and it's variability in primary care physicians (PC) and specialists. MATERIAL AND METHODS: Quantitative study: observational, cross-sectional and retrospective study. POPULATION: women aged 60-74years with active treatment for OPP (n=424) in May 2012...
April 14, 2017: Atencion Primaria
https://www.readbyqxmd.com/read/28361909/rational-mutagenesis-by-engineering-disulphide-bonds-improves-kluyveromyces-lactis-beta-galactosidase-for-high-temperature-industrial-applications
#6
Agustín Rico-Díaz, María-Efigenia Álvarez-Cao, Juan-José Escuder-Rodríguez, María-Isabel González-Siso, M Esperanza Cerdán, Manuel Becerra
Kluyveromyces lactis β-galactosidase (Kl-β-Gal) is one of the most important enzymes in the dairy industry. The poor stability of this enzyme limits its use in the synthesis of galactooligosaccharides (GOS) and other applications requiring high operational temperature. To obtain thermoresistant variants, a rational mutagenesis strategy by introducing disulphide bonds in the interface between the enzyme subunits was used. Two improved mutants, R116C/T270C and R116C/T270C/G818C, had increased half-lives at 45 °C compared to Kl-β-Gal (2...
March 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28329845/spatiotemporal-progression-and-remission-of-lesions-in-the-rat-brain-following-acute-intoxication-with-diisopropylfluorophosphate
#7
Sílvia Sisó, Brad A Hobson, Danielle J Harvey, Donald A Bruun, Douglas J Rowland, Joel R Garbow, Pamela J Lein
Similar to organophosphate (OP) nerve agents, diisopropylfluorophosphate (DFP) rapidly and irreversibly inhibits acetylcholinesterase, leading to convulsions that can progress to status epilepticus (SE). However, in contrast to the OP nerve agents, the long-term consequences of DFP-induced SE are not well known. Thus, we characterized the spatiotemporal profile of neuropathology during the first two months following acute DFP intoxication. Adult, male Sprague Dawley rats administered pyridostigmine bromide (0...
March 7, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28329842/magnetic-resonance-imaging-reveals-progressive-brain-injury-in-rats-acutely-intoxicated-with-diisopropylfluorophosphate
#8
Brad A Hobson, Sílvia Sisó, Douglas J Rowland, Danielle J Harvey, Donald A Bruun, Joel R Garbow, Pamela J Lein
Acute intoxication with organophosphates (OPs) can trigger seizures that progress to status epilepticus, and survivors often exhibit chronic neuropathology, cognitive impairment, affective disorders and/or electroencephalographic abnormalities. Understanding how acute injury transitions to persistent neurological sequelae is critical to developing medical countermeasures for mitigating damage following OP-induced seizures. Here, we used in vivo magnetic resonance imaging (MRI) to monitor the spatiotemporal patterns of neuropathology for one month after acute intoxication with diisopropylfluorophosphate (DFP)...
March 7, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28266278/synthesis-and-preliminary-cytotoxicity-studies-of-1-1-4-5-dihydrooxazol-2-yl-1h-indazol-3-yl-3-phenylurea-and-3-phenylthiourea-derivatives
#9
Anita Kornicka, Franciszek Sączewski, Patrick J Bednarski, Martyna Korcz, Piotr Szumlas, Ewa Romejko, Aneta Sakowicz, Łukasz Sitek, Monika Wojciechowska
BACKGROUND: N-substituted 3-amino-1H-indazoles represent an interesting class of biologically active compounds. Among them, derivatives containing phenylurea moiety are of particular interest. Such compounds have been found to possess inhibitory activity against cancer cell growth. Additionally, various oxazoline-containing compounds have also been designed as potential anticancer agents. OBJECTIVE: The aim of this work was to obtain a new class of N-substituted 3-amino-1H-indazole derivatives with cytotoxic activity towards cancer cells...
March 6, 2017: Medicinal Chemistry
https://www.readbyqxmd.com/read/28121885/the-drivers-of-academic-success-in-cleft-and-craniofacial-centers-a-10-year-analysis-of-over-2000-publications
#10
Natalie M Plana, Jonathan P Massie, Marleigh J Stern, Michael Alperovich, Christopher M Runyan, David A Staffenberg, Leonidas G Koniaris, Barry H Grayson, J Rodrigo Diaz-Siso, Roberto L Flores
BACKGROUND: Cleft and craniofacial centers require significant investment by medical institutions, yet variables contributing to their academic productivity remain unknown. This study characterizes the elements associated with high academic productivity in these centers. METHODS: The authors analyzed cleft and craniofacial centers accredited by the American Cleft Palate-Craniofacial Association. Variables such as university affiliation; resident training; number of plastic surgery, oral-maxillofacial, and dental faculty; and investment in a craniofacial surgery, craniofacial orthodontics fellowship program, or both, were obtained...
February 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28113132/osseodensification-for-enhancement-of-spinal-surgical-hardware-fixation
#11
Christopher D Lopez, Adham M Alifarag, Andrea Torroni, Nick Tovar, J Rodrigo Diaz-Siso, Lukasz Witek, Eduardo D Rodriguez, Paulo G Coelho
Integration between implant and bone is an essential concept for osseous healing requiring hardware placement. A novel approach to hardware implantation, termed osseodensification, is described here as an effective alternative. 12 sheep averaging 65kg had fixation devices installed in their C2, C3, and C4 vertebral bodies; each device measured 4mm diameter×10mm length. The left-sided vertebral body devices were implanted using regular surgical drilling (R) while the right-sided devices were implanted using osseodensification drilling (OD)...
May 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28058722/cell-level-anatomical-characteristics-explain-high-mesophyll-conductance-and-photosynthetic-capacity-in-sclerophyllous-mediterranean-oaks
#12
José Javier Peguero-Pina, Sergio Sisó, Jaume Flexas, Jeroni Galmés, Ana García-Nogales, Ülo Niinemets, Domingo Sancho-Knapik, Miguel Ángel Saz, Eustaquio Gil-Pelegrín
Leaf mass per area (LMA) has been suggested to negatively affect the mesophyll conductance to CO2 (gm ), which is the most limiting factor for area-based photosynthesis (AN ) in many Mediterranean sclerophyll species. However, despite their high LMA, these species have similar AN to plants from other biomes. Variations in other leaf anatomical traits, such as mesophyll and chloroplast surface area exposed to intercellular air space (Sm /S and Sc /S), may offset the restrictions imposed by high LMA in gm and AN in these species...
January 6, 2017: New Phytologist
https://www.readbyqxmd.com/read/28005726/teaching-our-patients-and-residents-time-s-limitations-and-technology-s-answer
#13
J Rodrigo Diaz-Siso, Natalie M Plana, Patricia D Chibbaro, Joseph G McCarthy, Roberto L Flores
No abstract text is available yet for this article.
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27933069/accumulation-and-secretion-of-coumarinolignans-and-other-coumarins-in-arabidopsis-thaliana-roots-in-response-to-iron-deficiency-at-high-ph
#14
Patricia Sisó-Terraza, Adrián Luis-Villarroya, Pierre Fourcroy, Jean-François Briat, Anunciación Abadía, Frédéric Gaymard, Javier Abadía, Ana Álvarez-Fernández
Root secretion of coumarin-phenolic type compounds has been recently shown to be related to Arabidopsis thaliana tolerance to Fe deficiency at high pH. Previous studies revealed the identity of a few simple coumarins occurring in roots and exudates of Fe-deficient A. thaliana plants, and left open the possible existence of other unknown phenolics. We used HPLC-UV/VIS/ESI-MS(TOF), HPLC/ESI-MS(ion trap) and HPLC/ESI-MS(Q-TOF) to characterize (identify and quantify) phenolic-type compounds accumulated in roots or secreted into the nutrient solution of A...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27816180/discrete-sliding-mode-controller-with-reaching-phase-elimination-for-tito-systems
#15
V D Hajare, A A Khandekar, B M Patre
Sliding mode control (SMC) is emerged as a powerful robust controller for the process control application. However, it does not posses robustness properties during reaching phase and suffers from chattering, which is undesirable. In this paper, a chatter free discrete sliding mode controller (DSMC) with reaching phase elimination is proposed. The issue of existence of reaching phase due to physical constraints such as saturation of actuating devices is also addressed. The two-input-two-output (TITO) system is decoupled into two single-input-single-output (SISO) systems using ideal decoupler...
November 2, 2016: ISA Transactions
https://www.readbyqxmd.com/read/27783706/investigation-of-multi-input-multi-output-robust-control-methods-to-handle-parametric-uncertainties-in-autopilot-design
#16
Coşku Kasnakoğlu
Some level of uncertainty is unavoidable in acquiring the mass, geometry parameters and stability derivatives of an aerial vehicle. In certain instances tiny perturbations of these could potentially cause considerable variations in flight characteristics. This research considers the impact of varying these parameters altogether. This is a generalization of examining the effects of particular parameters on selected modes present in existing literature. Conventional autopilot designs commonly assume that each flight channel is independent and develop single-input single-output (SISO) controllers for every one, that are utilized in parallel for actual flight...
2016: PloS One
https://www.readbyqxmd.com/read/27729905/metagenomics-of-thermophiles-with-a-focus-on-discovery-of-novel-thermozymes
#17
María-Eugenia DeCastro, Esther Rodríguez-Belmonte, María-Isabel González-Siso
Microbial populations living in environments with temperatures above 50°C (thermophiles) have been widely studied, increasing our knowledge in the composition and function of these ecological communities. Since these populations express a broad number of heat-resistant enzymes (thermozymes), they also represent an important source for novel biocatalysts that can be potentially used in industrial processes. The integrated study of the whole-community DNA from an environment, known as metagenomics, coupled with the development of next generation sequencing (NGS) technologies, has allowed the generation of large amounts of data from thermophiles...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27673543/computer-simulation-and-digital-resources-for-plastic-surgery-psychomotor-education
#18
REVIEW
J Rodrigo Diaz-Siso, Natalie M Plana, John T Stranix, Court B Cutting, Joseph G McCarthy, Roberto L Flores
Contemporary plastic surgery residents are increasingly challenged to learn a greater number of complex surgical techniques within a limited period. Surgical simulation and digital education resources have the potential to address some limitations of the traditional training model, and have been shown to accelerate knowledge and skills acquisition. Although animal, cadaver, and bench models are widely used for skills and procedure-specific training, digital simulation has not been fully embraced within plastic surgery...
October 2016: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27663188/neuro-adaptive-backstepping-control-of-siso-non-affine-systems-with-unknown-gain-sign
#19
Zahra Ramezani, Mohammad Mehdi Arefi, Hassan Zargarzadeh, Mohammad Reza Jahed-Motlagh
This paper presents two neuro-adaptive controllers for a class of uncertain single-input, single-output (SISO) nonlinear non-affine systems with unknown gain sign. The first approach is state feedback controller, so that a neuro-adaptive state-feedback controller is constructed based on the backstepping technique. The second approach is an observer-based controller and K-filters are designed to estimate the system states. The proposed method relaxes a priori knowledge of control gain sign and therefore by utilizing the Nussbaum-type functions this problem is addressed...
September 20, 2016: ISA Transactions
https://www.readbyqxmd.com/read/27567682/facial-transplantation-knowledge-arrives-questions-remain
#20
COMMENT
J Rodrigo Diaz-Siso, Eduardo D Rodriguez
No abstract text is available yet for this article.
October 1, 2016: Lancet
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