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https://read.qxmd.com/read/30781419/modeling-and-validation-of-vertical-direction-force-estimation-with-a-three-dimensional-force-measurement-instrument-based-on-a-zero-compliance-mechanism
#1
Md Helal An Nahiyan, Takeshi Mizuno, Masaya Takasaki, Yuji Ishino, Masayuki Hara, Daisuke Yamaguchi
The principle of a zero-compliance mechanism was used to develop a three-dimensional force measurement instrument. In each axis, the point of force is suspended by a zero-compliance mechanism. A vertical axis force estimation operation imitates the structure of a double series magnetic suspension system. An electromagnet directly controls the movement of the first suspended object (floator), which is denoted as a detection point, and indirectly controls the motion of the second floator, which is denoted as a point of force...
February 15, 2019: Sensors
https://read.qxmd.com/read/30777008/a-unique-insight-into-the-mirna-profile-during-genital-chlamydial-infection
#2
Ifeyinwa Benyeogor, Tankya Simoneaux, Yuehao Wu, Stephanie Lundy, Zenas George, Khamia Ryans, Danielle McKeithen, Roshan Pais, Debra Ellerson, W Walter Lorenz, Tolulope Omosun, Winston Thompson, Francis O Eko, Carolyn M Black, Uriel Blas-Machado, Joseph U Igietseme, Qing He, Yusuf Omosun
BACKGROUND: Genital C. trachomatis infection may cause pelvic inflammatory disease (PID) that can lead to tubal factor infertility (TFI). Understanding the pathogenesis of chlamydial complications including the pathophysiological processes within the female host genital tract is important in preventing adverse pathology. MicroRNAs regulate several pathophysiological processes of infectious and non-infectious etiologies. In this study, we tested the hypothesis that the miRNA profile of single and repeat genital chlamydial infections will be different and that these differences will be time dependent...
February 18, 2019: BMC Genomics
https://read.qxmd.com/read/30767923/turbidity-control-on-dissolved-air-flotation-process-using-fuzzy-logic
#3
Rodolpho Rodrigues Fonseca, Ivan Carlos Franco, José Pedro Thompson, Flavio Vasconcelos da Silva
This study intends to explore fuzzy logic control on clean water turbidity process with dissolved air flotation (DAF). Three different strategies were tested to regulate clean water turbidity by manipulating the saturator vessel flow output aiming for low actuators control effort. Saturator pressure was the manipulated variable (MV) in the first control loop named SISO I. The second control loop, SISO II, used recycle stream valve opening as MV. The third control loop (MISO) was developed applying fuzzy logic instead PID control...
December 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://read.qxmd.com/read/30763237/optimizing-robust-pid-control-of-propofol-anesthesia-for-children-design-and-clinical-evaluation
#4
Klaske van Heusden, Kristian Soltesz, Erin Cooke, Sonia Brodie, Nicholas West, Matthias Gorges, J Mark Ansermino, Guy Dumont
OBJECTIVE: The goal of this study was to optimize robust PID control for propofol anesthesia in children aged 5-10 years to improve performance, particularly to decrease the time of induction of anesthesia while maintaining robustness. METHODS: We analyzed results of a previous study conducted by our group to identify opportunities for system improvement. Allometric scaling was introduced to reduce the interpatient variability and a new robust PID controller was designed using an optimization based method...
February 8, 2019: IEEE Transactions on Bio-medical Engineering
https://read.qxmd.com/read/30745192/two-degrees-of-freedom-pi-2-d-controller-for-precise-nanopositioning-in-the-presence-of-hardware-induced-constant-time-delay
#5
Andres San-Millan, Vicente Feliu-Batlle, Sumeet S Aphale
The fast and accurate tracking of periodic and arbitrary reference trajectories is the principal goal in many nanopositioning applications. Flexure-based piezoelectric stack driven nanopositioners are widely employed in applications where accurate mechanical displacements at these nanometer scales are required. The performance of these nanopositioners is limited by the presence of lightly damped resonances in their dynamic response and actuator nonlinearities. Closed-loop control techniques incorporating both damping and tracking are typically used to address these limitations...
January 30, 2019: ISA Transactions
https://read.qxmd.com/read/30738584/analytical-fractional-pid-controller-design-based-on-bode-s-ideal-transfer-function-plus-time-delay
#6
Erhan Yumuk, Müjde Güzelkaya, İbrahim Eksin
In this paper, a fractional order PID controller cascaded with a fractional filter is proposed for higher order processes. In this analytical design methodology, one or two reduced fractional orders plus time delay models are used to represent higher order system transfer functions. The controller parameters are determined so as to meet certain frequency domain specifications. A unity feedback reference model is employed where Bode's ideal loop transfer function plus time delay of the fractional order model is placed in the forward path...
February 1, 2019: ISA Transactions
https://read.qxmd.com/read/30711342/proportional-myoelectric-and-compensating-control-of-a-cable-conduit-mechanism-driven-upper-limb-exoskeleton
#7
Feiyun Xiao
Recent studies have indicated that human motion recognition based on surface electromyography (sEMG) is a reliable and natural method for achieving motion intention. However, achieving accurate estimates of intended motion using a low computational cost is the main challenge in this scenario. In this study, a proportional myoelectric and compensating control method for estimating and assisting human motion intention with a cable-conduit mechanism-driven upper limb exoskeleton was proposed. The integral signal of sEMG and its time-delayed signals were applied as a new feature vector to represent the role of sEMG, which ensured the accuracy and real-time performance of motion estimation...
January 28, 2019: ISA Transactions
https://read.qxmd.com/read/30686295/optimal-controller-synthesis-for-second-order-time-delay-systems-with-at-least-one-rhp-pole
#8
K Ghousiya Begum, A Seshagiri Rao, T K Radhakrishnan
An optimal H2 minimization framework is proposed in this paper for devising a controller of PID in nature, based on a refined IMC filter configuration. The tuning strategy is for controlling time delay system with at least one pole which falls on the right half of the s-plane. An underdamped model based filter is used in place of the unity damping ratio (critically damped) filter available in the literature to improve the reset action. The method has a single adjustable closed loop tuning parameter. Guidelines have been provided for choosing the pertinent tuning parameter based on the sensitivity function...
February 2018: ISA Transactions
https://read.qxmd.com/read/30678400/-effects-of-adipose-derived-mesenchymal-stem-cells-from-type-2-diabetes-mellitus-patients-on-wound-healing-of-pressure-ulcers-in-mice
#9
C L Deng, Y Z Yao, Z Y Liu, B Wang, D L Wang, Z R Wei
To investigate the effects of adipose-derived mesenchymal stem cells (AMSCs) from type 2 diabetes mellitus patients on wound healing of pressure ulcers in mice. Methods: (1) In September 2016, the subcutaneous adipose tissue of a 60-year-old woman with type 2 diabetes mellitus was harvested, and then AMSCs were extracted by collagenase digestion and cultured. The third passage of cells were used for subsequent experiments. The morphology of cells was observed, and their osteogenic, chondrogenic, and adipogenic differentiation abilities were identified...
January 20, 2019: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://read.qxmd.com/read/30662522/the-risk-of-gynecologic-and-urinary-tract-cancer-with-pelvic-inflammatory-disease-a-population-based-cohort-study
#10
Hui-Wen Lin, Po-Hui Wang, Chung-Yuan Lee, Jing-Yang Huang, Shun-Fa Yang, Yi-Hsuan Hsiao
Purpose: The aim of the study was to determine the association between pelvic inflammatory disease (PID) and breast, colorectal, gynecologic and urinary tract cancer. Methods: The source of data was a longitudinal dataset compiled by the Longitudinal Health Insurance Database 2000 (LHID2000) which was collected by the National Health Insurance program. Cases of PID, at least two outpatient visits and one admission, were diagnosed from 2000 to 2013. The data for controls, age matched women who were not diagnosed with PID from 2000 to 2013, were also obtained...
2019: Journal of Cancer
https://read.qxmd.com/read/30660705/thermouseduino-an-affordable-open-source-temperature-control-system-for-functional-magnetic-resonance-imaging-experimentation-with-mice
#11
Darío R Quiñones, Luis Miguel Fernández-Mollá, Jesús Pacheco-Torres, José M Caramés, Santiago Canals, David Moratal
INTRODUCTION: Functional magnetic resonance imaging (fMRI) is one of the most highly regarded techniques in the neuroimaging field. This technique is based on vascular responses to neuronal activation and is extensively used in clinical and animal research studies. In preclinical settings, fMRI is usually applied to anesthetized animals. However, anesthetics cause alterations, e.g. hypothermia, in the physiology of the animals and this has the potential to disrupt fMRI signals. The current temperature control method involves a technician, as well as monitoring the acquisition MRI sequences, also controlling the temperature of the animal; this is inefficient...
January 17, 2019: Magnetic Resonance Imaging
https://read.qxmd.com/read/30640861/clinical-features-and-therapeutic-response-in-women-meeting-criteria-for-presumptive-treatment-for-pelvic-inflammatory-disease-associated-with-mycoplasma-genitalium
#12
Rosie L Latimer, Tim R H Read, Lenka A Vodstrcil, Jane L Goller, Jason J Ong, Christopher K Fairley, Jane S Hocking, Catriona S Bradshaw
BACKGROUND: There are limited published data describing clinical features and therapeutic response in women meeting the criteria for presumptive treatment of pelvic inflammatory disease associated with Mycoplasma genitalium (MG-PID). The MG-PID has been reported to respond poorly to standard PID treatment regimens and while moxifloxacin is recommended in several treatment guidelines, published data to support its use are scant. METHODS: We conducted a retrospective study of women at Melbourne Sexual Health Centre between 2006 and 2017, who met the Centers for Disease Control and Prevention criteria for presumptive treatment of PID, and had MG detected as the sole pathogen...
February 2019: Sexually Transmitted Diseases
https://read.qxmd.com/read/30633766/optimization-based-trajectory-planning-for-real-time-6dof-robotic-patient-motion-compensation-systems
#13
Xinmin Liu, Rodney D Wiersma
PURPOSE: Robotic stabilization of a therapeutic radiation beam with respect to a dynamically moving tumor target can be accomplished either by moving the radiation source, the patient, or both. As the treatment beam is on during this process, the primary goal is to minimize exposure of normal tissue to radiation as much as possible when moving the target back to the desired position. Due to the complex mechanical structure of 6 degree-of-freedom (6DoF) robots, it is not intuitive as to what 6 dimensional (6D) correction trajectory is optimal in achieving such a goal...
2019: PloS One
https://read.qxmd.com/read/30630615/analytical-design-based-hierarchical-control-for-non-square-mimo-wood-chip-refining-process
#14
Mingjie Li, Ping Zhou
This paper presents an analytical design based hierarchical control method for non-square MIMO wood-chip refining process, whose design procedure of the control scheme contains two layers. Firstly, the lower layer loop controller with PID structure is designed separately for the mutually independent lower layer device plant, and then generalized non-square process is obtained on the basis of lower layer closed-loop system and non-square MIMO refining process. Secondly, the upper layer setting controller with the centralized PID structure is designed by the multivariable decoupling control and internal model control (IMC), and an analytical designed method for the lower layer loop controller and the upper layer setting controller is developed using the maximum sensitivity (Ms ) specification...
December 31, 2018: ISA Transactions
https://read.qxmd.com/read/30630036/neural-control-of-postural-sway-relationship-to-strength-measures-in-young-and-elderly-adults
#15
Gregory W King, Eduardo L Abreu, Patricia J Kelly, Marco Brotto
Age-related changes in postural sway are well-established, and studied from a control perspective using an inverted pendulum model. The purpose of the present work was to expand previous research in this area by investigating relationships between sway-related control parameters and musculoskeletal measures of muscle function and health. Eleven female older adults and eight female young adults completed blood draw, grip, leg extension, and balance tests. Serum levels of skeletal muscle-specific troponin T (sTnT), a biomarker for muscle health, were obtained from blood samples...
January 7, 2019: Experimental Gerontology
https://read.qxmd.com/read/30627524/perianal-infectious-dermatitis-an-underdiagnosed-unremitting-and-stubborn-condition
#16
REVIEW
Elena Daniela Serban
Perianal infectious dermatitis (PID) represents a superficial inflammation of the perianal skin, which is of bacterial origin (classically, group A beta-hemolytic streptococci ). This narrative review aims to critically review and summarize the available scientific literature regarding pediatric PID, being the first of its kind, to the best of the author's knowledge. It also reports the first cases of Romanian children with PID. Multiple databases were subjected to systematic literature search (from 1966 to April 30, 2018) to identify studies and case reports of children with PID...
October 25, 2018: World Journal of Clinical Pediatrics
https://read.qxmd.com/read/30616983/a-computationally-efficient-strategy-to-estimate-muscle-forces-in-a-finite-element-musculoskeletal-model-of-the-lower-limb
#17
Alessandro Navacchia, Donald R Hume, Paul J Rullkoetter, Kevin B Shelburne
Concurrent multiscale simulation strategies are required in computational biomechanics to study the interdependence between body scales. However, detailed finite element models rarely include muscle recruitment due to the computational burden of both the finite element method and the optimization strategies widely used to estimate muscle forces. The aim of this study was twofold: first, to develop a computationally efficient muscle force prediction strategy based on proportional-integral-derivative (PID) controllers to track gait and chair rise experimental joint motion with a finite element musculoskeletal model of the lower limb, including a deformable knee representation with 12 degrees of freedom; and, second, to demonstrate that the inclusion of joint-level deformability affects muscle force estimation by using two different knee models and comparing muscle forces between the two solutions...
December 28, 2018: Journal of Biomechanics
https://read.qxmd.com/read/30616968/design-of-interval-type-2-fuzzy-precompensated-pid-controller-applied-to-two-dof-robotic-manipulator-with-variable-payload
#18
Prashant J Gaidhane, Madhav J Nigam, Anupam Kumar, Pyari Mohan Pradhan
The interval type-2 fuzzy logic controller (IT2-FLC), with footprint of uncertainty (FOU) in membership functions (MF), has increasingly recognized for controlling uncertainties and nonlinearities. Within the ambit of this, the efficient interval type-2 fuzzy precompensated PID (IT2FP-PID) controller is designed for trajectory tracking of 2-DOF robotic manipulator with variable payload. A systematic strategy for optimizing the controller parameters along with scaling factors and the antecedent MF parameters for minimization of performance metric integral time absolute error (ITAE) is presented...
December 27, 2018: ISA Transactions
https://read.qxmd.com/read/30606817/relation-between-chlamydia-trachomatis-infection-and-pelvic-inflammatory-disease-ectopic-pregnancy-and-tubal-factor-infertility-in-a-dutch-cohort-of-women-previously-tested-for-chlamydia-in-a-chlamydia-screening-trial
#19
Bernice M Hoenderboom, Birgit H B van Benthem, Jan E A M van Bergen, Nicole H T M Dukers-Muijrers, Hannelore M Götz, Christian J P A Hoebe, Arjan A Hogewoning, Jolande A Land, Marianne A B van der Sande, Servaas A Morré, Ingrid V F van den Broek
OBJECTIVES: A better understanding of Chlamydia trachomatis infection (chlamydia)-related sequelae can provide a framework for effective chlamydia control strategies. The objective of this study was to estimate risks and risk factors of pelvic inflammatory disease (PID), ectopic pregnancy and tubal factor infertility (TFI) with a follow-up time of up until 8 years in women previously tested for chlamydia in the Chlamydia Screening Implementation study (CSI) and participating in the Netherlands Chlamydia Cohort Study (NECCST)...
January 3, 2019: Sexually Transmitted Infections
https://read.qxmd.com/read/30605393/experimental-infection-of-white-tailed-deer-odocoileus-virginianus-with-bluetongue-virus-serotype-3
#20
Lorelei L Clarke, Mark G Ruder, Clara Kienzle-Dean, Deborah Carter, David Stallknecht, Elizabeth W Howerth
Bluetongue virus serotype 3 (BTV-3) has been found in the US since 1999 and was recently identified in white-tailed deer ( Odocoileus virginianus; WTD) found dead in Virginia and West Virginia in 2016. Bluetongue viruses are known to cause pathologic changes in WTD; however, the relative virulence and pathogenicity of BTV-3 in WTD is unknown. In our study, eight WTD fawns, 6-12 wk old, were needle inoculated subcutaneously with a field isolate of BTV-3, with one fawn sham-inoculated as a control during July 2017; all were monitored to determine the pathogenicity of BTV-3 in WTD...
January 3, 2019: Journal of Wildlife Diseases
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