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Patente US7642671 - Power supply system providing two output voltages - Google Patentes
A power supply system. The power supply system may have a power circuit having a switch and adapted to generate a first output voltage and a second output voltage, depending on the state of the switch. It also includes an output connector coupled to the power circuit, where the output connector includes a plurality of electrical contacts including a first electrical contact and a second electrical contact. A voltage output indicator device is coupled to the first and second electrical contacts. The voltage output indicator device indicates that the power circuit is producing the first output voltage or the second output voltage, so that the user is aware of the voltage being output by the power supply system.
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Current device designs to incorporate visceral arteries<...
TY - CHAP. T1 - Current device designs to incorporate visceral arteries. AU - Mendes, Bernardo C.. AU - Oderich, Gustavo. PY - 2017/3/16. Y1 - 2017/3/16. UR - http://www.scopus.com/inward/record.url?scp=85054177361&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=85054177361&partnerID=8YFLogxK. U2 - 10.1007/978-3-319-15192-2_24. DO - 10.1007/978-3-319-15192-2_24. M3 - Chapter. AN - SCOPUS:85054177361. SN - 9783319151915. SP - 349. EP - 358. BT - Endovascular Aortic Repair. PB - Springer International Publishing. ER - ...
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Patent US7968038 - Large diameter delivery catheter/sheath - Google Patents
A large diameter, flexible, kink-resistant, delivery catheter or sheath for percutaneous delivery of a contained and implantable medical device in the vasculature of a patient. The delivery catheter or sheath includes a reinforcement such as a flat wire coil with uniform spacing between the turns, which is compression fitted about an inner, lubricous PTFE tube. The delivery catheter or sheath further includes an outer tube of a heat formable polyamide material which is heat formed and compressed through the spaces between the turns of the wire coil to mechanically connect to a roughened outer surface of the inner tube. A polymeric radiopaque marker tube may be positioned at the distal end of the coil and between the inner and outer tubes for radiographic visualization. A side port may also be positioned thereat for the infusion of contrast media.
Accurate Real-Time Monitoring of Quality Factor and Center Frequency of Superconducting Resonators
In this paper, we track both center frequency and quality factor of a superconducting microwave resonator with very high precision using a modified Pound-Drever-Hall frequency locking scheme. The quality factor measurements can be done with high enough bandwidth to study different processes in a superconducting resonator in real time. With this added functionality, the frequency readout remains unaffected, with typical accuracy around 10-30 Hz/root Hz, whereas the cavity loss rate can be determined to within 0.1% on a millisecond time scale (34 dB/root Hz). As we demonstrate, this can be particularly useful for electron spin resonance measurements, where we achieve a minimum number of detectable spins coupled to the resonator N = 5 . 10(5) spins/root Hz, based on quality factor measurements. It also enables the study of fast dynamic processes, for example, vortex dynamics, in these devices on a short time scale.
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Patent US6976991 - Manipulatable delivery catheter for occlusive devices (LL) - Google Patents
This is in the general field of surgical instruments and is specifically a delivery catheter with a flexible, proximally-manipulated hinge or joint region. The inventive catheter may have a balloon region. The catheter may have a shaft of varying flexibility which contains several lumen. The inner, or delivery, lumen generally may be used with a guidewire to access target sites within the body via the flexible, small diameter vessels of the body. The delivery lumen may be also used for placement of occlusive materials, e.g., in an aneurysm. Inflation of the micro-balloon, located near the distal tip of the catheter, is effected using the inflation lumen. The push/pull wire lumen contains a wire, which when manipulated, flexes the catheters distal tip. The push/pull wire tubing may have a variable thickness to aid in adjusting the degree of flexibility. Moreover, the delivery catheter may be capable of twisting in a helical or corkscrew-like manner for traversing certain vasculature. This may be
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Wireless Force Sensing Technology Improves Biomedical Device Design and Function
Advancements in wireless force sensing technologies have improved the design of biomedical devices for patient utilization.. By Jeannine Croteau, Marketing and Mark Lowe, Product Manager. The medical device industry is constantly evolving due to the progressive nature of technology. Design engineers and consumers are looking for sleeker, smaller medical devices that do not inhibit their every day activity. Patients and doctors want to be able to collect data and information from these untethered devices while in the comfort of their own natural environment. The adoption of wireless technology by biomedical engineers has made this progression towards wire-free technology possible. This wireless trend has sparked a movement towards more innovative, cost effective technologies for the medical market. The development of smaller, more powerful medical devices matched with wireless capabilities is significantly changing the medical industry as we know it.. Wireless devices allow real time data as well ...
Uncategorized | UCD Medical Device Design Group
Kevins winning work Wearable biosignal sensors using microneedle technology concerned the development and evaluation of a novel microneedle-based surface electrode platform for surface EMG measurement. With the rise of home healthcare, ambulatory monitoring and associated wearable technology, a need for new sensing devices exists which can be easily applied without the need for professionals, and that enable high-quality measurements during day-to-day activities and long-term wear. While explored for use in surface EMG measurement, the technology can be applied to a wide range of other biosignal applications including electrocardiography (ECG) and electroencephalography (EEG). Furthermore, the 3D-printing-based fabrication methods developed open up new horizons in microneedle design and fabrication for non-invasive wearable sensors as well as microneedle array applications in general ...
Clinical Trials Registry | Internet Stroke Center
A novel body weight support device that uses pressurized pants may provide advantages in delivering gait therapy. The objectives of this study are to test the following hypotheses that 1) the novel device will allow for increased body weight support while improving or maintaining the same level of patient comfort; 2) the novel device will yield greater patient satisfaction with gait therapy relative to current harness systems; 3) therapists will be more satisfied with the use of the novel device relative to current harness systems; 4) the use of the novel device will require less total therapist time than a harness comparator; 5) the use of the novel device will increase therapeutic treatment time when compared with current harness systems. ...
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Beyond traditional light-emitting electrochemical cells - a review of new device designs and emitters - Journal of Materials...
In the field of solid-state lighting (SSL) technologies, light-emitting electrochemical cells (LECs) are the leading example of easy-to-fabricate and simple-architecture devices. The key-aspect of this technology is the use of a single active layer that consists of a mixture of an emitter and an ionic polyel Journal of Materials Chemistry C Emerging Investigators
Enhancing physiologic simulations using supervised learning on coarse mesh solutions | Journal of The Royal Society Interface
Emerging applications in clinical medicine and medical device design are just beginning to embrace the potential of computational modelling [1,2]. In the face of increasing interest by medical device companies, regulatory agencies  and clinicians [4,5], it is critical that we find approaches that yield accurate information quickly-whether it is in the optimization of device design over a wide parameter space [6-9], to better understand device and implant performance in patient-specific environments [10-16], or even to perform virtual feasibility studies for procedural planning (i.e. implantation of stents, endovascular grafts, heart valves, bioprosthetics, etc.) [17-20]. Particularly in clinical applications, speed and efficiency are paramount as results must be provided cost-effectively and often in urgent settings (i.e. within minutes). Historically, efficiency and practicality have trumped accuracy due to resource limitations associated with computational hardware and software as well as ...
Brevet US5843020 - Ablation device and methods - Google Brevets
An RF ablation device has a delivery catheter with distal and proximal ends. A handle is attached to the proximal end of the delivery catheter. The delivery catheter has an electrode deployment means where said electrode deployment means includes a retractable tip section comprising a deployable electrode with portion of one side having a sharp edge. The tip section has a non-deployed state when it is positioned in the delivery catheter. On the other hand, the tip section has a distended deployed state when it is advanced out of the distal end of said delivery catheter. The deployed tip section has a preformed shape while the farther distal deployed electrode defines an ablation target along with portion of the forward side having a sharp edge on said electrode. The forward edge of the deployed electrode has a slightly curvature or an essentially straight shape. Alternatively, the forward edge of the deployed electrode has sections with plurality of concave or convex curvatures.
Single-InN-Nanowire Nanogenerator with Upto 1 V Output Voltage<...
TY - JOUR. T1 - Single-InN-Nanowire Nanogenerator with Upto 1 V Output Voltage. AU - Huang, Chi-Te. AU - Song, Jinhui. AU - Tsai, Chung-Min. AU - Lee, Wei-Fan. AU - Lien, Der-Hsien. AU - Gao, Zhiyuan. AU - Hao, Yue. AU - Chen, Lih-Juann. AU - Wang, Zhong Lin. N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: CTH and JHS contributed equally to the research in this paper. Research was supported by DARPA (Army/AMCOM/REDSTONE AR, W31P4Q-08-1-0009), BES DOE (DE-FG02-07ER46394), KAUST, and NSF (DMS0706436, CMMI 0403671). Thanks are also due to National Science Council of Taiwan, Republic of China for a fellowship to study abroad (C. T. Huang). (NSC97-2917-1-007-110) This publication acknowledges KAUST support, but has no KAUST affiliated authors.. PY - 2010/7/30. Y1 - 2010/7/30. N2 - Piezoelectric potential of a InN nanowire (NW) growing along [011̄0] can be positive, negative, and zero depending on the direction of the applied transverse force. By measuring the output voltage of a ...
Reducing Size While Improving Functionality and Safety in Next-Generation Medical Device Design
Size can also be reduced by using space-efficient semiconductor packaging techniques such as chip-on-board assembly, chip-on-chip and, more recently, advanced 2-D and 3-D packaging. These packaging techniques can reduce overall circuit space in cardiac rhythm management (CRM) devices by up to 80 percent. One of the most effective techniques is the stacked-die approach, which simultaneously reduces interconnect lengths and impedances while increasing yield. Die stacking allows designers to combine multiple wafer process technologies in a small volume while improving test access. The Thin Interconnected Package Stacks (TIPS) project has made solid progress on next-generation stacked-die solutions. Funded by the IMEC R&D lab for nano-electronics in partnership with corporate and institutional organizations, the TIPS project has delivered a packaging approach that reduces device height and other dimensions while delivering the advantage of a single module ...
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Someone else listening - Show what other device is... - Page 29 - Pandora Community
Please add a functionality that tells us what other device is being used when you display the error that "Someone else is listening." This
Employing energy harvesting in wearable medical device designs - Embedded.com
One of the main challenges with battery-operated connected devices is autonomy. An increasing number will have requirements for greater battery power or
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The surprising impact of color on medical device design | PlasticsToday
Informed color selection can have a significant impact on patients and caregivers alike, according to Jeremy Cramer of Hueforia, the color development team of compounder RTP Co. (Winona, MN). He discussed medical applications for colored thermoplastics during a webinar today.
New publication on Si/SiC devices design and simulation ! - News & Events
This paper presents the design and optimization of a 600 V silicon-on-silicon carbide (Si/SiC) laterally diffused MOSFET with linear doping profile in the drift region for high-temperature applications. The proposed structure has an embedded silicon-on-insulator (SOI) layout through which the traditional graded doping theory for SOI can be applied in the Si/SiC architecture. An SOI counterpart is introduced as a benchmark and modeled alongside the proposed structure. Comparisons between them show that they have the near-identical OFF-state and breakdown characteristics, with a significant tunneling leakage component emerging above 450 V. In the ON state, the Si/SiC device has higher electrical resistance but much lower thermal resistance, leading to less self-heating and higher reliability.. For more detals, click here (open access) to download the paper from the IEEE page !.. ...
Fluid handling in medical device design - Todays Medical Developments
Key challenges and emerging trends in fluidics design: Considerations for achieving the best results when working with contract design and manufacturing firms.
Medical Device Design Archives - Xtalks
Mechatronics and embedded software add complexity to smart device design | EE Times
Solid Edge for Electronic Devices | Design Software
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Six sigma for medical device design [electronic resource] / Jose Justiniano, Venky Gopalaswamy
สำนักงานวิทยทรัพยากร เป็นหอสมุดกลางของจุฬาลงกรณ์มหาวิทยาลัยที่เพียบพร้อม สมบูรณ์ด้วยทรัพยากรสารสนเทศทุกประเภทที่มีมาตรฐาน สามารถให้บริการสนองความต้องการด้านการเรียน การสอน และการวิจัย
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New exercise device design for people with paraplegia | EurekAlert! Science News
Five North-eastern Uni-ver-sity student-researchers have retro-fitted a rowing machine with an inge-nious device, allowing people with para-plegia to exer-cise without the aid of a trainer. The mod-i-fied ergometer, dubbed the power row, was designed for a senior cap-stone project under the direc-tion of Sandra She-fel-bine, an asso-ciate pro-fessor of mechan-ical and indus-trial engi-neering.
US7470907B2 - Cross-slit collimator method and system - Google Patents
Collimator assemblies that include an outer slit collimator having one or more slits therein, and an inner slit collimator having one or more slits therein are provided. Imaging systems that include a collimator assembly and a detector array are also provided. The collimator assembly includes an outer slit collimator having one or more slits therein. The collimator assembly further includes an inner slit collimator having one or more slits therein. The imaging system also includes a detector array configured to detect gamma rays emanating from a field of view that pass through one or more apertures defined by the collimator assembly. The detector array is further configured to generate one or more signals in response to the detected gamma rays. Methods of imaging a field of view using the imaging system are also provided.
Quality Factor Strategies Still Merit Attention
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Patent US8170657 - Delivery catheters for light activated agents - Google Patents
A delivery catheter for delivery, then photo-activation of photo sensitive material has a photo-sensitive substance-delivery part and an activation part. The catheter delivers substances such as biomaterials to a target site, followed by illumination of the target using optics located at the distal tip of the catheter which are optically coupled to an extracorporeal light source. In another aspect a deployable light-delivery catheter is disclosed that can illuminate a large area of tissue.
macos - Wifi Keeps Dropping Macbook Pro 13in Retina Early 2015 - Ask Different
Ok Ive got to the bottom of this. It was my router. I have now upgraded from a Virginmedia Superhub VMDG480 to the latest Superhub 2ac. Its been over a week now and the connection is solid, so Im answering this myself. Their latest kit has concurrent 2.4Ghz & 5Ghz, which I think has resulted in a more robust connection overall. Considering there where three phones, a media server, 3 computers, two tablets, a printer and an Xbox on at any one time, I just dont think the 2010 kit could hack it. Not to mention the extremely crowded 2.4Ghz band in my area.. I think the reason it seemed to affect my Macbook more than other devices is that, after testing against other devices, the wifi reception doesnt seem as sensitive as other devices, meaning, it dropped the connection a lot more than devices at the same range. As a side note, my Galaxy Tab 8.4 Pro seems to have super robust wifi reception in comparison with the Mac.. ...
Automatic gain control circuit for signal with diverse power level range - Patent # 6420934 - PatentGenius
An automatic gain control circuit for amplifying an input signal of varying strength and having a fast attack mode of operation and a tracking mode of operation includes a gain controlled amplifier for receiving the input signal and producing an amplified analog output signal, a receive signal strength indicator (RSSI) circuit for receiving the amplified analog signal and producing an output voltage indicative of strength of the signal, and decision logic circuitry responsive to the output voltage from the RSSI circuit for controlling gain to the gain controlled amplifier. A plurality of comparators is provided for comparing the output voltage from the RSSI circuit to threshold voltages in generating output signals indicative of the voltage comparisons which can indicate the RSSI output voltage being very low, low, high, or very high as inputs to the decision logic circuit. The decision logic circuitry can then provide a fast acquisition mode of
IN BRIEF A patient-centered approach to device design can provide important advantages in optimizing diabetes care technology for broadened adoption and improved adherence. Results from two surveys of people with diabetes and the parents of children with diabetes (n = 1,348) regarding continuous glucose monitoring (CGM) devices reveal the importance of the concept of user burden in patients and caregivers evaluations of the acceptability of available devices. Survey respondents strongly favorable reactions to a proposed 1-year, fully implanted CGM device with no skin-attached components further confirm that minimizing system obtrusiveness will likely be of significant value in reducing hurdles to CGM device use and adherence. ...
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Results from multiple prospective single-center clinical trials of the off-the-shelf p-Branch fenestrated stent graft | Lund...
Objective: The purpose of this study was to report prospective data of an off-the-shelf fenestrated endograft (Zenith p-Branch; Cook Medical, Bloomington, Ind) from four centers for the treatment of patients with pararenal abdominal aortic aneurysms. Methods: Data were combined from four single-center investigational studies conducted in the United States and Europe. The p-Branch endograft consists of a proximal off-the-shelf component incorporating a scallop for the celiac artery, a superior mesenteric artery fenestration, and two conical pivot fenestrations to preserve flow to the renal vessels. The device is available in two configurations, a left renal fenestration at the same (configuration A) or lower (configuration B) longitudinal position than the right to accommodate varied anatomy of the patients. Results: Between August 2011 and September 2015, 76 patients (82% male; mean age, 72 years; 65 elective and 11 emergent) were enrolled, with 55% implanted with option A and 45% with B. The ...
One encoder disc fits all applications - Drives and Controls Magazine
Drives and Controls Magazine: One encoder disc fits all applications A new encoder system from Stegmann uses only one disc for any number of lines. It is not necessary to locate the zero-pulse manually. Instead the user can remove a cap on the encoder housing, press a button, and replace the cap. Stegmann claims the Coretech encoder can offer any number of lines from 1 to 8192 and, for absolute encoder applications, from 1 to 32,768 steps-per-revolution, as well as 256 different mechanical and electrical combinations. Stegmann says it can produce 10 million Coretech variants from 100 individual components and despatch them within 48 hours. Darren Pratt, the company`s UK encoder product manager, asserts that this level of availability is totally unique and unavailable elsewhere. Usually, encoder manufacturers need to know an encoder`s shaft type and profile before its is manufactured because they use a large number of etched discs which have to be cemented to the shaft. By
2aSA1. Effects of transducer mass on resonance frequency and quality factor of free--free bars.
Abstract: The use of resonant free--free bars to determine the elastic properties of materials has been presented previously [Garrett, ``Resonant acoustic determination of elastic moduli, J. Acoust. Soc. Am. 88, 210--221; Brown, ``Characterization of viscoelastic materials using the resonant modes of a `free--free bar, J. Acoust. Soc. Am. 94, 2294(A) (1993)]. The preferred excitation and detection method is based on electrodynamic transduction in which a coil of wire is attached to each bar end, which in turn is subjected to a strong magnetic field. The effect of the added transducer mass on the observed resonant frequency and quality factors of longitudinally driven bars used to determine Youngs modulus and damping will be reported. [Work supported by the University of Massachusetts Dartmouth ...
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Media Alert | Vicor DCM ChiP expands enhanced output voltage regulation models | Vicor Corporation
Vicor has introduced 25 new products to its growing family of DC-DC converter modules (DCMs) with tighter output voltage regulation of ±1%. With unrivaled power densities of 1,032W/in3, the new series allows engineers to drive loads requiring tighte
Todays Medical Developments - Medical device design, contractors manufacturing, technology, implants, equipment
Medical device design and manufacturing news, resources, equipment technology for manufacturers, tools, products, materials, robotic, components for medical device engineers, designers, contractors, orthopedic, surgical equipment and implants.
Development of a new 3-DOF parallel manipulator for minimally invasive surgery<...
TY - JOUR. T1 - Development of a new 3-DOF parallel manipulator for minimally invasive surgery. AU - Khalifa, Alaa. AU - Fanni, Mohamed. AU - Mohamed, Abdelfatah M.. AU - Miyashita, Tomoyuki. PY - 2018/6/1. Y1 - 2018/6/1. N2 - This article proposes a novel dexterous endoscopic parallel manipulator for minimally invasive surgery. The proposed manipulator has 3 degrees of freedom (3-DOF), which consist of two rotational DOFs and one translational DOF (2R1T DOFs). The manipulator consists of 3 limbs exhibiting identical kinematic structure. Each limb contains an active prismatic joint followed by 2 consecutive passive universal joints. The proposed manipulator has a unique arrangement of its joints axes. This unique arrangement permits large bending angles, ±90° in any direction, and a workspace almost free from interior singularities. These advantages allow the proposed manipulator to outperforms existing surgical manipulators. However, this unique arrangement makes the analysis of the robot ...
Future Industry Trends & Forecast 2025: Applications of Field Programmable Gate Array - An Overview
Field programmable gate arrays (FPGAs) represent the currently the most popular and also the newest media for designing application specific integrated digital circuits. They contain an array of a large number of programmable sequential and combinational logic elements (called gates, logic blocks or look up tables). The array of such logic blocks, literally a sea of them, is distributed across a digital chip through interconnections that are programmable. This array is surrounded by a programmable input/output blocks ...
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Patent US4380696 - Method and apparatus for manipulator welding apparatus with vision ... - Google Patents
Control apparatus for manipulator welding apparatus is provided that includes a vision correction system for workpiece sensing. During an initial teach mode, the manipulator is taught the desired welding path on a workpiece by the appropriate recording of data representing the welding path as an operator controls movement of the manipulator. In addition to the data representing the taught welding path, data representing a reference image or template is also recorded in the teach mode. The reference image or template data is provided by a vision system including a camera carried by the manipulator arm. As successive workpieces are presented to the manipulator for performing the desired welding path, in a repeat work cycle mode the manipulator is controlled to move in accordance with the recorded taught data in a first repeat pass wherein images of the welding seam region are detected at successive points. The vision system utilizing an image processor detects the deviation between the taught welding path
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Modeling light-tissue interaction in optical coherence tomography systems<...
TY - CHAP. T1 - Modeling light-tissue interaction in optical coherence tomography systems. AU - Andersen, Peter E.. AU - Jørgensen, Thomas Martini. AU - Thrane, Lars. AU - Tycho, Andreas. AU - Yura, H. T.. PY - 2015. Y1 - 2015. KW - Absorption. KW - Light propagation. KW - Light tissue interaction. KW - Optical coherence tomography. KW - Scattering. KW - Theoretical model. U2 - 10.1007/978-3-319-06419-2_4. DO - 10.1007/978-3-319-06419-2_4. M3 - Book chapter. SN - 978-3-319-06418-5. SP - 95. EP - 140. BT - Optical coherence tomography. A2 - Drexler, W.. A2 - Fujimoto, J.G.. PB - Springer. ER - ...
A contour-mode film bulk acoustic resonator of high quality factor in a liquid environment for biosensing applications<...
TY - JOUR. T1 - A contour-mode film bulk acoustic resonator of high quality factor in a liquid environment for biosensing applications. AU - Xu, Wencheng. AU - Choi, Seokheun. AU - Chae, Junseok. PY - 2010/2/17. Y1 - 2010/2/17. N2 - This letter reports an acoustic resonator of high quality factors (Qs) operating in liquid media. The film bulk acoustic resonator (FBAR) is made of a ring-shaped piezoelectric aluminum nitride thin film, and is excited in a contour mode. By having a low motional resistance upon coupling with liquids, the contour mode FBAR achieved Qs up to 189, more than 12× over the state-of-the-art FBARs in liquids. The resonator was characterized by an aptamer-thrombin binding pair for a biosensor and showed a mass resolution of 1.78 ng/ cm2.. AB - This letter reports an acoustic resonator of high quality factors (Qs) operating in liquid media. The film bulk acoustic resonator (FBAR) is made of a ring-shaped piezoelectric aluminum nitride thin film, and is excited in a contour ...
Risk assessment methodology for iron stability under water quality factors based on fuzzy comprehensive evaluation |...
Changing water quality was prevalent in the current water supply. The fluctuation of iron stability due to changing water quality followed four characteristics: objectivity, relativity, predictability, and controllability. Therefore, it was necessary to study the stability of iron in the pipe network by integrating different water quality factors. The iron stability risk evaluation system was established according to the different water quality factors in the drinking water distribution systems (DWDSs). Meanwhile, an improved fuzzy comprehensive evaluation method was established to evaluate the risk of iron. Chloride, sulfate, dissolved organic matter (DOM) and pH were selected as the risk assessment index. The divisions of different evaluation levels were carried out through the values of water quality factor. On the basis of expert scoring, the weight and membership degree of water quality factors were analyzed by structural entropy method. In addition, risk analysis was established by using the
DEVICE SYSTEM AND METHOD FOR TISSUE ACCESS SITE CLOSURE - Patent application
0070] Delivery catheter 16 is then pulled back (in a proximal direction) until an end portion 15 thereof is positioned against the inner artery wall at access site hole 22 (FIG. 3). Distal portion 15 is pivotally attached and thus can angle and align with the longitudinal axis of artery 12 to facilitate deployment of expandable device 18 described below. Delivery catheter also includes an inspection hole 17 for indicating correct positioning of distal portion 15 of delivery catheter 16 within artery 12. Such an indication can be provided by stoppage of blood dripping from inspection hole 17 when delivery catheter is correctly positioned. To enable such functionality inspection hole 17 is fluidly connected to a conduit which terminates at a distal region of delivery catheter 16. When that distal region of delivery catheter is positioned within artery 12, the conduit communicates blood flowing through artery 12 to inspection hole 17, however, when delivery catheter is pulled back to a position in ...
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Design and Experimental Assessment of an Elastically Averaged Binary Manipulator Using Pneumatic Air Muscles for Magnetic...
Early diagnostic and treatment of prostate cancer could be achieved using magnetic resonance imaging (MRI) to improve tumor perceptibility. Nonetheless, performing intra-MRI interventions present significant challenges due to intense magnetic fields and limited patient access. This paper presents an MRI-compatible manipulator using elastically averaged binary pneumatic air muscles (PAMs) to orient a needle into a targeted region of the prostate under the command of a physician. The proposed manipulator is based on an all-polymer compliant mechanism designed to make a completely MRI-compatible positioning system. A model based on the PAMs deformation energy is used to design the manipulator so that its discrete workspace, stiffness, and size meet clinically relevant design requirements. The model is also used to study the motion of the device during a state shift. A laboratory prototype of the device shows that the covered workspace, stiffness, and size of the manipulator can meet clinical ...
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Innovative revolving biopsy device design supported by additive manufacturing | Transactions on Additive Manufacturing...
Additive manufacturing is widely used in the meantime for medical device developments. Specially the BioDesign process with strong user integration and feedback loops benefits from fast prototyping. In this work, an innovative conceptual design of revolving biopsy needle is CAD modelled using SolidWorks software and subsequently 3D printed. The material properties of the resins were fit to use for fabrication of the different mechanisms that the prototype requires. 3D printing is a very good method of quickly checking different design ideas, to present functionalities to clinical partners, to optimize and define the ideal design. Even delicate structures are possible.. ...
MAESTRO 4000™ Cardiac Ablation System - Indications, Safety and Warnings - Boston Scientific
INTENDED USE/INDICATIONS FOR USE. The Maestro 4000 Cardiac Ablation System is intended for use with BSC cardiac ablation catheters in cardiac ablation procedures.. Note: Refer to the individual catheter Directions for Use for catheter compatibility to the Maestro 4000 Cardiac Ablation System. It is also important to carefully review the specific indications, contraindications, warnings, precautions and adverse events included with each catheter, prior to use of the catheter with the Maestro 4000 Cardiac Ablation System.. CONTRAINDICATIONS. There are no specific contraindications for use of the Maestro 4000 Cardiac Ablation System itself. However, users should read and understand the specific indications, contraindications, warnings, and precautions included with any cardiac ablation catheter used in conjunction with the System.. Note: The contraindications listed in the catheter Directions For Use also apply to the use of the Maestro 4000 Cardiac Ablation System. Carefully review the specific ...
NTNU Open: Mechanical design optimization of a 6DOF serial manipulator using genetic algorithm
Robots are becoming increasingly more common in the industry. In order to expand the use of robotic manipulators to complex tasks, a higher degree of tailoring of robots may be required. Tailoring of the mechanical design of a robot manipulator can be formulated as an optimization problem and we propose to use Genetic Algorithms (GA) to optimize link lengths, link diameters, and link thickness in order to determine the robot design for a given fitness function. As a case, the optimization of a robot manipulator for automated cleaning of fish processing plants is presented. For this application, the kinematic layout and joint configuration are decided beforehand. The dynamics of the robotic manipulator are presented along with the optimization algorithm and implemented in Java. Results show that the GA is well suited for the optimization of the design ...
WO1991001772A1 - Catheter, manipulator and combination thereof - Google Patents
The present invention relates to a catheter, a manipulator and a combination thereof. In the wall (7) of the catheter a pull line (8) is slideably mounted. The proximal end of the pull line is fastened in an inner spindle (14) of a manipulator and the distal end of the pull line is fastened at an X-ray marker in the distal end of the catheter (1). During axial movement of the setting means (11) of the manipulator this movement is transmitted to the distal end portion of the catheter, whereby a relatively large movement of the setting means (11) is shifted down to a smaller movement of the end portion of the catheter via the adjusting sleeve (15) and spindle (14) of the manipulator. The position set by the setting means (11) is irreversible and the catheter (1) shows twisting strength.
High Temperature Electronics for Vehicle Integration | SBIR.gov
All future combustion and electric powered automobiles will be equipped with sensors directly interfaced with control electronics. The control and power electronics for combustion engines will have to cope with high temperatures and adverse environments. Hybrid and electric vehicles require new device technology to handle the high power in their distribution and control systems. High efficiency, low weight and elevated temperature operation electronics will be critical. Because of its unique physical and electronic properties, silicon carbide is an ideal semiconductor for both high temperature and high power applications. Yet despite SiCs promise, little attention has been paid to the optimization of device designs for high power application. We propose to address a key power device design requirement, minimization of parasitic effects which limit performance, and thereby demonstrate the superiority of SiC devices. ATMs expertise in high purity SiC substrates and epitaxial growth will be ...
Forward Displacement Analysis of a Quadratic Planar Parallel Manipulator: 3-RP̱R Parallel Manipulator With Similar Triangular...
planar parallel manipulator with similar triangular platforms. Although it has been revealed numerically elsewhere that for this parallel manipulator, the four solutions to the FDA fall, respectively, into its four singularity-free regions (in its workspace), it is unclear if there exists a one-to-one correspondence between the four formulas, each producing one solution to the FDA, and the four singularity-free regions. Using an algebraic approach, this paper will prove that such a one-to-one correspondence exists. Therefore, a unique solution to the FDA can be obtained in a straightforward way for such a parallel manipulator if the singularity-free region in which it works is specified. ...
Application of electronic valve in air separation field in PP pipe plant Guangdong Yulong Plastic Co.,Ltd
Application of electronic valve in air separation field in PP pipe plant-Guangdong Yulong Plastic Co.,Ltd- Application of electronic valve in air separation field Solenoid valves are widely used in our production. In the maintenance of production, we must have met many problems related to solenoid valves and dealt with many faults. We must have accumulated a lot of experience in dealing with the faults of solenoid valves. Compared with other instrument and control faults, we deal with the faults of solenoid valves in maintenance. Now let's discuss this problem together, I hope we can learn more from you and improve together. First, we have a preliminary understanding of solenoid valve. Solenoid valve is composed of solenoid coil and magnetic core. It is a valve body with one or more holes. When the coil is energized or de energized, the operation of the magnetic core will cause the fluid to pass through the valve body or be cut off, so as to change the direction of the fluid. The
Cells to society: lactate and neuromuscular incapacitation devices. - Semantic Scholar
Devices employed in electrical policing rely on fundamental responses of nerve and muscle to supraphysiologic current to quell disruptive behavior. Whilst widely deployed the use of neuromuscular incapacitation (NMI) remains controversial, in part, due to gaps in understanding of the underlying mechanisms related to injury. NMI device manufacturers are thus constrained by empirical evidence for safety and effectiveness for a specific device design. Here we examine published data for several NMI devices considering ex vivo signal characteristics and in vivo responses in relation to effectiveness and injury. The sensitivity of lactate production to NMI device signal frequency (Hz) and macro-dosimetry is explored as a primary device design factor in NMI modes of injury. The non-lethal approach to policing regardless of technology will result in fatalities due to compromised health and substance abuse status unknowable at the time of NMI application. Thus, research to establish a science-based understanding
SAMPLE PROJECT: CarryIT - Protective Cases for Smartphones, Tablets and Other Devices | Skillshare Projects
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QDTs Canary System wins International Medical Device Design and Development Award - Dental Tribune Canada
TORONTO, CANADA: Quantum Dental Technologies (QDT), a medical device company, became the first Canadian business to win the National Instruments (NI) ...
INDEED Network - Innovative Nanowire Device Design
The INDEED network is a €4 million Marie Skłodowska-Curie Actions- Innovative Training Network (ITN) - project funded by the European Commission, under the H2020 program and coordinated by Durham University. INDEED is a consortium of 11 Universities and 2 industrial companies, together with 13 associate industry partners across Europe.. The main scientific objective is to translate semiconductor nanowire (NW) technology concepts into market-ready products. As such, the scientific programme is directed towards customer-oriented R&D and exploits innovative industrial design techniques to ensure rapid translation of the basic technologies into commercial devices.. ...
CUSTOM DEVICE SOLUTIONS - Device Design Will Act as Competitive Distinguisher in a Post-Patent Expiry Biosimilar Market
George Ions dissects the different factors that will determine biosimilars adoption and pace of advancement against their original counterparts, namely clinical confidence in the biosimilar and patient confidence in the drug delivery device.
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A novel device using the Nordic hamstring exercise to assess eccentric knee flexor strength: A reliability and retrospective...
STUDY DESIGN: Reliability and case-control injury study.OBJECTIVES: To determine if a novel device designed to measure eccentric knee flexor strength via the Nordic hamstringexercise displays acceptable test-retest reliability; to determine normative values for eccentric knee flexor strength derived from the device in individuals without a history of hamstringstrain injury (HSI); and to determine if the device can detect weakness in elite athletes with a previous history of unilateral HSI.BACKGROUND: HSI and reinjury are the most common cause of lost playing time in a number of sports. Eccentric knee flexor weakness is a major modifiable risk factor for future HSI. However, at present, there is a lack of easily accessible equipment to assesseccentric knee flexor strength.METHODS: Thirty recreationally active males without a history of HSI completed the Nordic hamstring exercise on the device on 2 separate occasions. Intraclass correlation coefficients, typical error, typical error as a ...
Danfoss Solenoid Valves For Ammonia And Fluorinated Refrigerants - M and M Controls
Danfoss solenoid valve direct or servo operated for liquid, suction and hot gas lines with ammonia or fluorinated refrigerants. The coils for solenoid valves are specially designed to operate in the aggressive environment of high humidity and temperature fluctuations that are present in most industrial refrigeration systems.
Brevet US5692147 - Memory mapping method and apparatus to fold sparsely populated structures ... - Google Brevets
A field programmable gate array has a plurality of programmable resources addressable per respective x and y dimensions of an x,y two dimensional array. A memory device provides a plurality of memory units that store configuration data for configuring associated programmable resources of the field programmable gate array. A controller addresses the memory device with an N-bit address for retrieving given configuration data. An address decoder and sequencer divides the N-bit address into first, second, and third portions and employs the first and third portions interchangeably, in accordance with the second portion, for addressing respective x and y dimensions of the plurality of programmable resources for selecting an associated programmable resource to be configured in accordance with the retrieved configuration data.
Study shows novel device significantly reduces blood draw contamination, reduces risks to patients
A study at the University of Nebraska Medical Center (UNMC) found that a novel device can significantly reduce contamination of blood cultures , potentially reducing risky overtreatment
SELF HEATING MONITOR FOR SiGe AND SOI CMOS DEVICES - Patent application
0041]It should be noted that although a particular example of forming the heating and measuring devices is discussed above, any fabrication process which produces a pair of semiconductor devices such as FETs in thermal communication with one another may be suitable for the temperature measurement. As such, the temperature measurement method can work with any pair of devices where one of the devices produces heat, and the other device responds to that heat in some measurable way, such as one of its electrical characteristics changing in accordance with its temperature. It should also be noted that while the examples discussed above use two devices of similar design for heating and measuring, the measurement device and the heating device may be of completely different designs as long as the heating device is capable of heating and the measurement device is capable of measuring temperature and the two are in thermal contact. Additionally, two devices may be in thermal contact with one another ...
Diagnostic imaging capabilities of the Ocelot -Optical Coherence Tomography System, ex-vivo evaluation and clinical relevance |...
The ability to have accurate and catheter based intravascular imaging provides interventional physicians with invaluable insight into the procedural vascular anatomy . Luminal angiography has long been the gold standard for visualizing the arterial lumen and is routinely used for arterial reconstruction. Nevertheless, the structural composition of diseased arterial beds is not adequately visualized by angiography . Intravascular imaging provides important structural information, which is frequently used for diagnostic and therapeutic decision making during the interventional procedure. The highest resolution source for intravascular imaging, optical coherence tomography (OCT), is a sub-surface imaging modality using near-infrared light .. Physicians use OCT to evaluate, characterize and understand intravascular anatomic features of normal and abnormal vessels. OCT accomplishes this via emission of a light source and no additional ioninizig radiation.. Initially, intravascular ultrasound ...
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Area Based Fan Beam Projection Model for Computed Tomography by Phillip J. Stevens
Computed tomography (CT) is image reconstruction of objects using computer processed transmission or reflection data, usually referred to as projection data, from x-ray scanning. This projection data is often modeled using line integrals, but x-rays are of finite width in reality, so the accuracy of the projection data can be improved if an area based approach is used instead. In addition emitter beam shapes affect the reconstruction effectiveness and data collection efficiency, with the two main types of beam choice for 2-D scanning being fan beam and parallel beam. Fan beam scanning offers some advantages over parallel beam, such as faster data collection. This paper presents an area based fan beam projection model for CT and discusses its effectiveness based on numerical image reconstruction experiments using the proposed model, and several different reconstruction algorithms.
FPGA Based Real Time Serial Communication with Heat Exchanger MAHE Digital Repository
Embedded control of process plants is the state-of-the art development gaining importance by research community. Field Programmable Gate Array (FPGA) is a versatile tool for implementing embedded controller. In this paper the process of interfacing the Shell and Tube Heat Exchanger (STHE) with Compact Reconfigurable Input Output (CRIO) based FPGA through VDPID03DAQ card has been presented. The STHE VTPA-H-353 is a versatile and reliable computer based temperature process having microcontroller based data acquisition hardware unit. The DAQ card used for data acquisition consists of analog to digital converter, digital to analog converter and a microcontroller on a single board. A graphical program has been developed for the real time data acquisition using CRIO based FPGA. CRIO-9012 was interfaced with RS232 to the data acquisition card of STHE process plant. FPGA acts as a standalone processor instead of the PC for controlling the process plant.. ...
Simple device can reduce swelling after kidney transplantation
In a published study, a team from Lawson Health Research Institute has found that a simple device can reduce swelling after kidney transplantation. Re...
Adaptive Terminal Sliding Mode Control for Rigid Robotic Manipulators
In order to apply the terminal sliding mode control to robot manipulators, prior knowledge of the exact upper bound of parameter uncertainties, and external disturbances is necessary. However, this bound will not be easily determined because of the complexity and unpredictability of the structure of uncertainties in the dynamics of the robot. To resolve this problem in robot control, we propose a new robust adaptive terminal sliding mode control for tracking problems in robotic manipulators. By applying this adaptive controller, prior knowledge is not required because the controller is able to estimate the upper bound of uncertainties and disturbances. Also, the proposed controller can eliminate the chattering effect without losing the robustness property. The stability of the control algorithm can be easily verified by using Lyapunov theory. The proposed controller is tested in simulation on a two-degree-of-freedom robot to prove its effectiveness.. ...
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Patent US5873861 - Plunger systems - Google Patents
The plunger systems for use in an injector-actuated syringe of the present invention include a dynamic wedge seal which improves the sealing engagement between the plunger cover and syringe barrel, and flexible capture members extending from the rear surface of the plunger which permit the engagement and disengagement of the plunger from the injector drive means at any plunger position within the syringe. Further, the plunger systems include a contrast saving tip which expells the injection liquid from the syringe tip.
NCP1522 datasheet(1/17 Pages) ONSEMI | 3.0 MHz, 600 mA, High−Efficiency, Low Quiescent Current, Adjustable Output Voltage Step...
© Semiconductor Components Industries, LLC, 2006August, 2006 − Rev. 31Publication Order Number:NCP1522/DNCP15223.0 MHz, 600 mA,High−Efficiency, LowQuiescent Current,Adjustable Output Voltage datasheet search, datasheets, Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes and other semiconductors.