Lock Device Research Articles

A Miniaturized Therapeutic Chromophore for Multiple Metal Pollutant Sensing, Pathological Metal Diagnosis and Logical Computing.

The efficacy of a miniaturized unimolecular analytic system is illustrated. The easily accessible therapeutic chromophore “temoporfin”, which responds differentially to bound metals at multiple wavelengths of Q-band absorption using chemometric analysis, expeditiously detects and discriminates a wide range of metals regarded as priority pollutants in water and hence may also be used for diagnosis of medically relevant metals in human urine. The molecule was further investigated as an electronic logic device, e.g. keypad lock device, to authorize multiple highly secure chemical passwords for information protection.

Suspension Type Stereo Bicycle Parking Garage

At present, many countries have vigorously advocated the use of green environmental protection of the bicycle as a means of transport, a large number of bicycle parking problems become a problem. In order to solve the present bicycle parking space, parking chaos, and convenient use, easy theft problem, this paper proposes a suspension type stereo bicycle parking garage, mainly includes three parts: rotating device, lifting device, fingerprint lock device, through the combination of the three can achieve the design goal of each layer parking a number of parking spaces, and can realize every layer of parking spaces and parking spaces for each rise and fall, the design of fingerprint lock device to ensure the safety of the bicycle parking garage, and parking garage can achieve overall contraction, simple and portable.

Design of Multichannel Osmium-Based Metalloreceptor for Anions and Cations by Taking Profit from Metal-Ligand Interaction and Construction of Molecular Keypad Lock and Memory Device.

A polypyridylimidazole-based bifunctional Os(II) complex of the type [(bpy)2Os(tpy-Hbzim-dipy)](ClO4)2 (1), where tpy-Hbzim-dipy = 4'-[4-(4,5-dipyridin-2-yl-1H-imidazol-2-yl)-phenyl]-2,2';6',2″-terpyridine and bpy = 2,2'-bipyridine, has been synthesized and structurally characterized for the construction of multifunctional logic devices. After coordination of an [Os(bpy)2](2+) unit to one of the two bidentate chelating sites, the complex offers a terpyridine motif for binding with cationic guests and an imidazole moiety for interacting with selective anionic species. Consequently, the anion- and cation-binding aspects of the metallorecptor were examined in solution and in the solid state by different spectroscopic and electrochemical methods. The complex behaves as a bifunctional sensor for F(-), AcO(-), CN(-), Fe(2+), and Cu(2+) ions in acetonitrile, whereas it is a highly selective chromogenic chemosensor for only CN(-) and Fe(2+) ions in water. Based on various output signals with a particular set of anionic and cationic inputs, the complex mimics the functions of two-input INHIBIT, OR, NOR, and XNOR logic gates, as well as three-input NOR logic behavior. More importantly, the complicated functions of a keypad lock and memory device were also nicely demonstrated by the complex. Finally, density functional theory (DFT) and time-dependent density functional theory (TD-DFT) calculations also provide a rationale for properly understanding and interpreting the experimentally observed results.

Modified snare removal of a retained lead

Article history: Received 24 October 2015 Accepted 26 October 2015 Available online 9 November 2015 tation the old one was attempted to be removed manually by performing simple traction. The proximal portion of the lead, however, was torn and retained. Two and a half years after the second procedure the pulse generator was explanted and proximally cut leads were left in the pocket because of pocket infection. Just before being referred to our center some retained leads protrude from the pectoral skin. Nonpowered extraction tools, locking stylets (Lead Locking Device® EZ,

Anthraimidazoledione-Terpyridine-Based Optical Chemosensor for Anions and Cations That Works As Molecular Half-Subtractor, Key-Pad Lock, and Memory Device

We designed in this work a new family of anthraquinone and imidazole functionalized bifunctional terpyridine receptor, 2-(4-(2,6-di(pyridine-4-yl)phenyl)-1H-anthra[1,2-d]imidazole-6,11-dione (tpy-HPhImz-Anq) for recognition and sensing of selective anions and cations as well as for the construction of multifunctional logic devices. The terpyridine motif in the receptor was utilized for the cation coordination site and the imidazole moiety as the anion binding site. Both anion and cation recognition aspects of the receptor were thoroughly investigated in acetonitrile, mixed DMSO–water, as well as in solid media via different optical channels such as absorption, steady state, and time-resolved emission spectroscopic techniques. On the basis of the absorption and emission spectral responses toward a specific set of ionic inputs, this unique bifunctional receptor can mimic several advanced logic functions such as those of half-subtractor, key-pad lock, and memory device. We also report the implementation of t...

Lock Your Robot: A Review of Locking Devices in Robotics

Locking devices are widely used in robotics, for instance to lock springs and joints or to reconfigure robots. This review article classifies the locking devices currently described in the literature and performs a comparative study. Designers can therefore better determine which locking device best matches the needs of their application. The locking devices are divided into three main categories based on different locking principles: 1) mechanical locking, 2) friction-based locking, and 3) singularity locking. Different locking devices in each category can be passive or active. Based on an extensive literature survey, this article summarizes the findings by comparing different locking devices on a set of properties of an ideal locking device.

Fracture of DF-4 implantable cardioverter defibrillator lead in a pediatric patient.

Sir, A 10-year-old girl with a left ventricle noncompaction and strong family history of sudden cardiac death had received transvenous implantable cardioverter defibrillator (ICD; Evera VR, Medtronic Inc, Minneapolis, MN, USA). Device was implanted in the left subpectoral area using a left axillary vein access. Venous puncture was performed using the first rib technique under fluoroscopy guidance with no difficulties. A single coil DF-4 ICD lead (Medtronic, Sprint Quatro 6935M -62 cm) was inserted and positioned at the right ventricular apex with excellent sensing and pacing parameters. She presented 1year later with device alarm and was found to have a high ICD lead pacing impedance (>3,000 Ω), undetectable R-wave, and non-capture. The Lead Integrity Alert prevented inappropriate shocks. She was not involved in any form of competitive sport or direct trauma. Fluoroscopy showed lead fracture [Figure 1]. The patient underwent ICD lead extraction using a simple traction with the aid of a Lead Locking Device (Spectranetics, Colorado Springs, CO, USA). Although the polyurethane surrounding the lead was intact, a conductor fracture could be observed through the insulation about 1 cm beyond the tie down. A new ICD lead then was implanted.Figure 1: Fluoroscopy showed lead fractureThe evolution of new leads technology simplified the implantation techniques and improved the pocket profile particularly in pediatrics; however, this technology is yet to be evaluated. The first report of aDF-4 ICD lead fracture highlighted the possible mechanism of fracture.[1] A multicenter post-approval study for St. Jude Medical™ DF-4 system showed a 0.1% fracture rate;[2] however, the mechanism of the lead fracture was not described in this study. In our report, we described aDF-4 ICD lead fracture in a pediatric patient. Although the lead was angulated at the entry point into the vein, we think this is not enough to explain the lead fracture. Given the increasing number of DF-4 ICD lead implantation in the recent years, such lead fracture may gain more attention.

Evaluation of the Use of a Stabilization Device to Improve the Quality of Care in Patients With Peripherally Inserted Central Catheters

Objectives This project evaluated the implementation of use of the StatLock stabilization device (Bard Access Systems, Inc, Salt Lake City, Utah) for peripherally inserted central catheters (PICCs) in pediatric cardiology patients. The aim was to implement the use of the Stat- Lock device and evaluate its effects on the following 4 outcomes: incidence of dislodgement, infection, catheter dwell time, and the number of catheter replacements. The primary goal was to determine whether the StatLock device offered advantages over tape and sutures. Methods A quality improvement design was used to evaluate whether the use of the StatLock stabilization device for PICC securement on 30 pediatric cardiology patients decreased the number of PICC complications compared with 30 historical comparison patients. Results The comparison group had a significantly higher number of catheter dislodgements (n = 16; 59.3%) than the StatLock group (n = 8; 30.8%; P =.035). The comparison group did not have a significantly higher number of catheter replacements (n = 16; 59.3%) than the StatLock group (n = 10; 34.5%; P =.10). No significant differences were found in the rate of infection or in the catheter dwell time between the 2 groups (StatLock group, mean ± SD = 33.13 ± 22.71 days; comparison group, mean ± SD = 28.10 ± 24.83 days; P >.20). Conclusions Use of the StatLock device resulted in better outcomes when compared with the use of sutures, and it provided a more effective way to stabilize and secure PICCs.

Megawatt Wind Turbine Hydraulic Brake System Locking Device Modeling and Research Based on AMESim

As a megawatt-class wind turbine braking system, in addition to brake, it should also be in place with a wind wheel locking device to ensure that the failure of the braking system in the normal case fan will not burst start again.To solve the problem the article has designed a hydraulic locking device, and USES the AMESim software on the research and analysis.

The treatment of clavicular shaft fractures with an innovative locked intramedullary device

Displaced and shortened clavicular shaft fractures can be treated by intramedullary fixation; however, hardware migration and soft tissue irritation at the insertion site have complicated its use. The aim of this study was to determine whether the new Sonoma CRx intramedullary device (Sonoma Orthopedic Products Inc, Santa Rosa, CA, USA) could be used successfully to treat displaced and shortened clavicular shaft fractures and restore the functional capacity of shoulder without the development of secondary complications. Displaced and shortened clavicular shaft fractures in 47 consecutive patients were treated with the CRx device. Incision size was captured during the surgical procedure. The union rate was evaluated postoperatively. Shoulder function was assessed by Disabilities of the Arm, Shoulder and Hand (DASH) score, the Constant Shoulder Score, and a range of motion score. Patients were assessed after 3 to 6months (group I), 6 to 9months (group II), or 9 to 12months (group III) postoperatively. Union was achieved in all patients at the time of review, without any incidence of hardware migration. Postoperative complications developed in 3 patients, comprising infection in 1 and hardware failure in 2. No differences among the groups were found for the DASH score (P=.33), Constant Shoulder Score (P=.38), and range of motion score (P=.96). The DASH, Constant Shoulder, and range of motion scores were similar to other successful treatment options, such as plating. The Sonoma CRx is a good alternative device to treat displaced and shortened clavicular shaft fractures and restore the functional capacity of the shoulder. Future research should focus on when nailing and plating should be used to treat clavicular shaft fractures most optimally.

Percutaneous direct mitral annuloplasty using the Mitralign Bident™ system: description of the method and a case report

Functional mitral regurgitation (FMR) is known to contribute to a poor prognosis in patients with heart failure (HF). Current guidelines do not recommend cardiac surgery in patients with FMR and impaired ejection fraction due to the high procedural risk. Percutaneous techniques aimed at mitral valve repair may constitute an alternative to currently used routine medical treatment. To provide a description of a novel percutaneous suture-based technique of direct mitral annuloplasty using the Mitralign Bident system, as well as report our first case successfully treated with this method. A deflectable guiding catheter is advanced via the femoral route across the aortic valve to the posterior wall of the ventricle. A nested deflectable catheter is advanced through the guide toward the mitral annulus that allows the advancement of an insulated radiofrequency wire to cross the annulus. The wire is directed across the annulus in a target area that is 2-5 mm from the base of the leaflet into the annulus, as assessed by real-time 3D transoesophageal echocardiography. After placement of the first wire, another wire is positioned using a duel lumen bident delivery catheter, which provides a predetermined separation between wires (i.e. 14, 17 or 21 mm). Each wire provides a guide rail for implantation of sutured pledget implants within the annulus. Two pairs of pledgets are implanted, one pair in each of the P1 and P3 scallop regions of the posterior mitral annulus. A dedicated plication lock device is used to provide a means for plication of the annulus within each pair of the pledgets, and to retain the plication by delivering a suture locking implant. The plications result in improved leaflet coaptation and a reduction of the regurgitant orifice area. A 60-year-old female with diagnosed dilated cardiomyopathy, concomitant FMR class III and congestive HF was successfully treated with the Mitralign Bident system. Two pairs of pledgets were implanted resulting in an improvement of transoesophageal echocardiographic parameters, including proximal isovelocity surface area radius (0.7 cm to 0.4 cm), effective regurgitant orfice area (0.3 cm² to 0.1 cm²) and mitral regurgitant volume (49 mL to 10 mL). Percutaneous mitral annuloplasty with the Mitralign Bident system is feasible. Future clinical trials are needed to assess its safety and efficacy.

Design and Application of an all Moving Wing Model Limiting and Locking Device

To effectively excite the all moving wing flutter model and limiting or quick locking model in case of bigger amplitude of the model, an excitation and limiting and locking device is designed for the high-speed wind tunnel flutter test model. This paper introduces the structure arrangement, control principle and strategy of this device. The wind tunnel flutter test indicates that this device can enhance the SNR of the test data, improve the boundary prediction precision of flutter, prevent the model from entering the flutter divergence state and protect the model and wind tunnel test equipment.

Kinematics Simulation for the Baler's Locking Device Based on ADAMS

By using Solid Edge, the virtual prototype of the steel stripe locking device of the baler can be set up. The kinematics analysis can be accomplished through ADAMS. According to this joint modeling method, the simulation of the parts of the power input and output are analyzed. According to this kinematics simulation analysis, the foundation for the mechanical optimized design of steel stripe locking device will be laid. By this joint virtual prototype simulation, complex virtual prototype mechanism design has a certain practical reference value.

Pragmatism v. Originalism: A Mistrial?

In 2007, Shirley Katz, a high school teacher in southern Oregon, went to court to challenge her school's policy that prevented her from bringing her legally owned pistol to her workplace. She had a concealed weapons permit and claimed that she needed to bring her weapon to school because she feared for her personal safety; she had taken out several restraining orders against her former husband and she feared that he might appear at her workplace and that she would be in danger. Besides this practical reason, she claimed that she had a constitutional right to arms. (After two years of litigation, the Oregon Court of Appeals eventually ruled against her request and in favor of the school district's prohibition against allowing weapons at the school.)The Second Amendment to the United States Constitution reads as follows:A well-regulated militia, being necessary to the security of a free state, the right of the people to keep and arms, shall not be infringed.What, exactly, does this mean? The content of the expression bear consists of two words, and arms. Does arms mean: own, possess, carry, produce, sell, and perhaps other terms? Does arms mean: knives, torpedoes, battleships, biological toxins, and perhaps other terms? In addition, what is meant by the people in the amendment's wording: is it meant distributively (that is, to each and every person) or collectively (that is, to the population of citizens as a whole)? Does the Second Amendment say, or at least imply, that I, David Boersema, have the right to own and keep in my home semi-automatic weapons or the ingredients for constructing chemical explosives? How are questions such as these to be answered?The Supreme Court of the United States has answered, or at least addressed, them on a number of occasions. For instance in 2008, in the case of District of Columbia, et al. v. Heller, the Court overturned a District of Columbia law that banned handgun possession by making it a crime to carry an unregistered firearm and prohibited the registration of handguns; separately it provided that no person may carry an unlicensed handgun, but authorized the police chief to issue 1-year licenses; and required residents to keep lawfully owned firearms unloaded and dissembled or bound by a trigger lock or similar device. Respondent Heller, a D. C. special policeman, applied to register a handgun he wished to keep at home, but the District refused. He filed a suit seeking, on Second Amendment grounds, to enjoin the city from enforcing the bar on handgun registration, the licensing requirement insofar as it prohibited carrying an unlicensed firearm in the home, and the trigger-lock requirement insofar as it prohibited the use of functional firearms in the home. The District Court dismissed the suit, but the D. C. Circuit reversed, holding that the Second Amendment protects an individual's right to possess firearms and that the city's total ban on handguns, as well as its requirement that firearms in the home be kept nonfunctional even when necessary for self-defense, violated that right. But the Heller case addressed only federal laws; it left open the question of whether Second Amendment rights protect gun owners from overreaching by state and local governments. Two years later the U.S. Supreme Court extended their ruling and ruled that The Second Amendment's guarantee of an individual right to arms applies to state and local gun control laws. On what basis did and could the Court make such rulings?1. Legal and judicial interpretationLegal language, because it is language, requires interpretation. In addition, because legal language is not (merely) descriptive, but is (also) exhortative, it especially requires interpretation. Laws and statutes (at least many of them) do not simply state what is the case, but are one of our codified means to regulate our behavior, to say what ought to be the case. …

Locked Intramedullary Fixation vs Anatomically Contoured Locked Plating Of Clavicle Shaft Fractures – A Prospective Randomized Controlled Trial

Objectives:The treatment of displaced clavicle shaft fractures has evolved due to complications experienced by conservatively treated patients. Numerous operative modalities are available with various positive and negative aspects associated with each technique. This prospective randomized controlled trial compares the outcome of patients treated operatively with a novel locked intramedullary device and patients treated by traditional anatomically contoured locked plating.Methods:Patients with displaced and shortened clavicle shaft fractures were randomized according to presentation into 2 groups - intramedullary fixation and anatomically contoured locked plating. All patients were operated by the same surgeon with similar post-operative regimes for both groups. Outcomes accessed were DASH and Constant Shoulder scores at 6 weeks, 3 months and 6 months, scar size and quality, operative time, union rate and incidence of supraclavicular nerve injury at the time of surgery. Patients were assessed by the operative surgeon, a physiotherapist and an occupational therapist. Progression to union was assessed by a radiologist.Results:40 patients with 6 months follow-up were available for review - 20 in each group. No statistically significant difference in average DASH and Constant Shoulder scores at 6 weeks, 3 months and 6 months for the two groups were found. The surgical scars were smaller and the cosmetic result better in the intramedullary group. Operative time was significantly shorter in the intramedullary group. Both groups achieved a 100% union rate at 6 months post-op. The rate of supraclavicular nerve injury in the plating group was higher and most patients complained of prominent hardware.Conclusion:Locked intramedullary fixation of clavicle shaft fractures using the Sonoma CrX system was found to be a reliable method of achieving fracture reduction and fracture union. Shoulder function was restored and union achieved with a good cosmetic result. Supraclavicular nerve injury is rare and a second operation to remove prominent hardware is not necessary. Patient outcomes were found to be similar to that achieved by anatomically contoured locked plating - the current accepted gold standard method of treatment.

2B4 繰返し荷重に対する摩擦式締結具の可能性(<OS2>耐疲労設計:基礎研究と応用事例2)

2B4 繰返し荷重に対する摩擦式締結具の可能性(<OS2>耐疲労設計:基礎研究と応用事例2)

Research and Application of 9-5/8〞Retrievable Casing Drilling Technology

Combined with present situation of ShengLi oilfield drilling equipments and its matching tools, Drilling Technology Research Institute of ShengLi has carried out research on retrievable casing drilling technology, and made emphasis on the research of the retrievable BHA. Running/Retrieving tool of BHA, Locking device of BHA and Composite bits have been designed and completed. And the laboratory experiments of these key tools have been finished. The field experiments have been finished in He4-GX60 well and Xin110-X16 well. The trial result has proven that the retrievable casing drilling device is simple in structure, the design is rational and it can meet the demand of field application. The construction technique of casing drilling is completely feasible, technical route is right, which satisfied with the field operation requirements

Venipuncture Versus Peripheral Catheter: Do Infusions Alter Laboratory Results?

Our aim was to evaluate the equivalence between analytic parameters from blood samples obtained from a saline solution lock device used for the infusion of drugs and those from venipuncture. In our emergency department, patients bearing a saline solution lock device have blood extracted by venipuncture to avoid possible contamination of the sample. Adults from the emergency department with a saline solution lock device who required laboratory tests were selected as candidates for this cross-sectional observational study. Infusions were halted and flushed with 0.9% saline solution; 2 minutes later, 2 mL of blood was drawn and discarded, and the corresponding laboratory tubes were filled. Immediately after, another sample was withdrawn from the opposite extremity by venipuncture. Both samples were analyzed for hematology, biochemistry, venous blood gases, and coagulation parameters. Concordance was evaluated by use of the intraclass correlation coefficient with its 95% confidence intervals; Bland-Altman plots were used to illustrate the percentage of samples with differences exceeding 2 SDs. The mean differences were also checked to detect those exceeding the laboratory's systematic error. An intraclass correlation coefficient of over 0.9 was achieved for all parameters except for pH, partial pressure of carbon dioxide, and partial pressure of oxygen. Differences of over 2 SDs were found in fewer than 10% of all parameters. None of them exceeded 3 SDs, except for pH and venous blood gases. All parameters showed differences below the laboratory's accepted systematic error except for pH and venous blood gases. Blood samples extracted from a peripheral catheter with or without drug infusions are valid for the analysis of hematology, biochemistry, and coagulation parameters but not for venous blood gases. Nurses should know the benefits of using an existing peripheral catheter for drawing blood samples for laboratory analysis even when infusing commonly used drugs. Emergency nurses should consider collecting blood specimens from a venous access device regardless of the type of drug infusions administered, because it is a safe, simple, and fast technique, which is time efficient when treating patients with limited venous access sites. This procedure reduces patient discomfort and the risk of complications related to venipunctures.

A Molecular Keypad Lock That Uses Cu(II) Cations and H2PO4 - Anions as Inputs

Molecular keypad lock devices have considerable advantages over simple molecular logic gates because the output signals not only depend on the proper combination of inputs but also on the sequence of the input signals. Especially, keeping in view the role played by transition metal ions, anions and electronic devices in day to day life, the development of applications in electronic devices upon chemical inputs of these cations or anions in a sequential manner is very important. Previously, we designed a 2, 2'-dihydroxyazobenzene (DHAB)-based model of a keypad lock system depending on the inputs sequence of Zn(ll) cations and H2PO4- anions. In the present work, we studied the properties of 2-((E)-(2-((E)-3-bromoallyloxy)phenyl)diazenyl)phenol, compound 1, toward anions in the absence and presence of Cu(ll) cations, in order to further explore the potential applications of DHAB-based sensing systems. We demonstrated that the application of compound 1 with the inputs of Cu(ll) cations and H2PO4- anions could be realized as a molecular keypad lock which could be of future interest in molecular computing.

Design and Experiment of Repeated Electromagnetic Locking Device for Magnetic Bearing Flywheel

According to the repeated electromagnetic locking device based on the self-locking principle for magnetic bearing flywheel,the electromagnetic and mechanics characteristics of primary explicit electromagnet are analyzed.It is concluded that the minimum unlocking residual force is much too large,while the adoption of the implicit electromagnet can get rid of it and increase the unlocking reliability.The equivalent magnetic circuit method is applied to magnetic analysis of implicit electromagnet,and its mechanics model under four statuses including carrying out locking/unlocking and keeping locking/unlocking is got.The electromagnetic numerical analysis method is used for a solid example design for the implicit electromagnet.Additionally,to verify the protective effect of the improved locking device for the flywheel system during satellite launch,the swept-sine vibration and random vibration are carried out.The results show that the minimum unlocking residual force of locking device is 0.25 N,far smaller than that of explicit electromagnet about 29.5 N.Moreover,the maximum vibration displacement between the flywheel stator and rotor is 70 μm and its maximum amplitude is 10 μm.Both of them are less than the flywheel system protective gap of 100 μm.This indicates that the improved implicit electromagnet can effectively carry out the locking protection function to the flywheel system while raising the unlocking reliability.