![]() In recent years, the number of malicious attacks on the UW network have increased substantially, presenting a serious security risk to the University. Access to UW Medicine resources via Citrix also will not be affected. It will also not affect access to Dropbox, peer-to-peer (P2P) or secure file transfer (FTP) programs. These changes will not affect web-based UW resources and services, such as uw.edu web pages, Canvas, Google Drive or Office 365. Connections to devices on the UW Wi-Fi network, which includes any type of a wireless-connected device, such as printers, a remote camera, or a wireless-connected laptop.Network file-sharing applications, such as those that allow you to transfer files to and from a UW-network-connected file server.Remote desktop (but not the use of a Remote Desktop Gateway see the Frequently Asked Questions section for more information).Examples of applications that require a VPN to connect include: Use the Networks Portal tool from any computer you use to connect to UW resources to see if you are on a UW network, or see the Frequently Asked Questions section below for more information. Not sure if you are connected to a UW network? Visit UW-IT’s YouTube channel for the audio described version of the video. Learn what a VPN is, your options, and how to use a VPN in this brief video. If you are connecting from on-campus (the Seattle campus and related facilities, UW Bothell, UW Tacoma and at UW Medicine facilities), you should not be impacted by this change. College/Division/Department/Units: If you do not have a department VPN, a new for-fee Husky OnNet-Department service can provide secure access for retirees, alumni and other groups.Departmental VPN: Contact your unit or department’s IT group to see if they provide an UW department/unit VPN for your use.Alumni and retirees can contact their unit or department’s IT group to see if an UW department/unit VPN is available.For more information about Pulse Secure, please visit the UW Medicine IT Services web page or contact UW Medicine IT Services. UW Medicine and clinical department users with AMC accounts can use SSL VPN ( Pulse Secure).Please review the information on this web page, and get the software. Current students, faculty, including emeriti, and staff can use Husky OnNet, a free service.If you are not currently using Husky OnNet, a department/unit VPN, or UW Medicine VPN, please see below for options. A VPN is an application on your computer that establishes a secure connection to a network. Starting on April 24, 2018, if you access UW resources from off-campus through a remote desktop or network file-sharing application, you will be required to first use the Husky OnNet VPN, a department/unit VPN, or UW Medicine secure virtual private network (VPN) service. Changes to the UW Network beginning April 24, 2018Ĭhanges to the UW network, beginning April 24, 2018. ![]() ![]() The following information was shared with the University of Washington and UW Medicine community about changes will affect people and groups that connect to UW resources from off-campus using a remote desktop or file-sharing application. The University is making important security enhancements to protect the UW network against an increasing number of malicious attacks that put personal and University data, devices and systems at risk. Phase 1: Remote Desktop and File-Sharing Applications Request Campus Subdomains and Non-UW Domains.Installing, Configuring, and Using Husky OnNet.Phase 1: Remote Desktop and File-Sharing Applications.Wireless Routers in UW Residence Hall Rooms.Wi-Fi LAN Security and Co-existence Guideline.Temporary UW NetID Support Roles and Responsibilities.Manual Long-term Registration of a Wireless Device.
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![]() This will allow you to create personalised barcode or qrcode. Finally, click on ‘Submit’ to start the process of uploading and. Click on ‘Choose File’ to choose the QR code saved on your computer. You want to create your own barcode or QR Code? In future, we plan to expand this app of the barcode generator and qr code generator. First, capture the photo of a QR code, and transfer it to your computer, or save the QR code on your computer, if you come across it while surfing on the web. application recognizes different codes in various formats: Data Matrix, Quick Code, EAN 8/13, Code128, EQS, QR Code and other. history - any time you can check full archive of your code scanning you can decode also: text, urls, ISBN, contacts information, calendar events, if you scan code with phone numbers, email addresses, contact info or full information from business card, this app will enable you to save this information in the appropriate places on your smartphone (contact list, adressbook, etc.) With its simple interface, users can quickly and easily scan WiFi QR codes and automatically connect to a WiFi network without having to enter a password. if code contains text or numbers, you can automatically search this data in browser, WiFi QR Code Scanner is a powerful and intuitive tool for quickly and easily connecting to WiFi networks. if the scanning code contains a website URL, you can automatically open this website, Most of all, the user interface is pretty minimal and straightforward. This simply means that the installation and uninstallation will be clean and hassle-free. IYIA QR Code Scanner is a UWP app and can be downloaded directly from the Microsoft Store. all QR code and any bar code supported, IYIA QR Code Scanner If you are on a Windows 10 system then IYIA QR Code Scanner is for you. The most important features of this barcode reader: This code scanner is very easy to use, secure and you can use it without limits! Use the smartphone camera and qr code scanner fast scan and recognize the all types of code. QR code scanner is the fastest and most user friendly bar code reader in play store. Looking for simple and quick QR code scanner or barcode reader that supports all major code formats? QR code reader is perfect app for you. This is the base class for all session objects. You can read it and write to ssion at any point in your view. Session attribute, which is a dictionary-like object. ![]() Object – the first argument to any Django view function – will have a When SessionMiddleware is activated, each HttpRequest Cookies will onlyīe detected as ‘stale’ if they are older than yourįinally, the size of a cookie can have an impact on the speed of your site. Thus if an attacker steals a user’s cookie, they can use thatĬookie to login as that user even if the user logs out. When a user logs out, cookie-based sessions are not invalidated when a user Unlike other sessionīackends which keep a server-side record of each session and invalidate it This means that for some uses of session data, theĬookie backend might open you up to replay attacks. that you are being sent back the last thing you Integrity of the data (that it is all there and correct), it cannot (that it was generated by your site, and not someone else), and the Note also that while the MAC can guarantee the authenticity of the data Possible to exceed the common limit of 4096 bytes Even though Django compresses the data, it’s still entirely your user’s browser) can’t store all of the session cookie andĭrops data. The same invalidation happens if the client storing theĬookie (e.g. When using the cookies backend the session data can be read by the client.Ī MAC (Message Authentication Code) is used to protect the data againstĬhanges by the client, so that the session data will be invalidated when being The session data is signed but not encrypted If you use cookie-based sessions, pay extra care that your secret key isĪlways kept completely secret, for any system which might be remotely SECRET_KEY_FALLBACKS can not only generate falsified sessionĭata, which your site will trust, but also remotely execute arbitrary code, Secret and you are using the .PickleSerializer, this can leadĪn attacker in possession of the SECRET_KEY or If the SECRET_KEY or SECRET_KEY_FALLBACKS are not kept This avoids edge cases caused by unreliable data storage in production. But unless your cache is definitelyĬonfigured for sufficient persistence, opt for the cached database backend. The cache backend can be made persistent by using a persistent cache, such as Up or the cache server is restarted, and it will mean session data is lost, This isįaster because it avoids database persistence, but you will have to consider The cache backend ( cache) stores session data only in your cache. ![]() Instructions for the using database-backed sessions. ".cached_db", and follow the configuration Use the cache, or the database if the data has been evicted from the cache. Session writes are applied to both the cache and the database. The cached database backend ( cached_db) uses a write-through cache – Once your cache is configured, you have to choose between a database-backed To use another cache, set SESSION_CACHE_ALIAS to the If you have multiple caches defined in CACHES, Django will use theĭefault cache. NOT multi-process safe, therefore probably not a good choice for production Additionally, the local-memory cache backend is Long enough to be a good choice, and it’ll be faster to use file orĭatabase sessions directly instead of sending everything through the file The local-memory cache backend doesn’t retain data You should only use cache-based sessions if you’re using the Memcached or ![]() My personal favourite is PSequel for its clean UI though. Give them both a try and leave us your comments below. Moreover, if you have to deal with big data and manage your tables along with the every little trigger and stats. Although its still in its beta development but fulfils all the basic needs. If you're kinda familiar with sequelPro, then you might like PSequel. ![]() Well yes, thats right, that's it for the database. Since we've successfully created a new user, creating databases is almost as easy. This will create a new user for your Postgres with user name and password of root and can create new databases. psql CREATE ROLE root LOGIN PASSWORD 'root' JInstall PostgreSQL 14.7 for MacOS In this tutorial, you'll learn how to install PostgreSQL 14.7 on your MacBook using Homebrew, a popular package manager for macOS. Additionally you can create a new user if required by entering into psql command shell. Then, of course, brew install postgres is the one-line command for installing PostgreSQL. 8 Answers Sorted by: 761 You could also use homebrew to install libpq. Next step is to setup the configuration.Įnter the postgres shell and create new root user to handle all the permissions.īy default, postgres will create a user by your system name and assign all the roles necessary. Once Homebrew is installed, you can install PostgreSQL by issuing the following commands in your terminal: brew update brew doctor brew install postgres The first two commands are used to update Homebrew and report any potential issues (if necessary). Configuring postgreSQLĪt this point, you have successfully installed postgres on your mac. You can also run postgres -help to have a look at all the available options with postgres command. ![]() It should return the postgres version installed on your machine. Try running the following command to check if its installed correctly. MacPorts PostgreSQL packages are also available for macOS from the MacPorts Project. A list of PostgreSQL packages can be found using the Braumeister search tool. Homebrewis a package manager for Mac OS X that builds software from its source code. Please see the Homebrew documentation for information on how to install packages. HomeBrew will take care of all the dependencies required for Postgres on your machine. PostgreSQL can also be installed on macOS using Homebrew. Open up a new terminal window and paste in the following command to install postgres on you mac. To install Postgres with Homebrew, follow the steps below: The first thing to do is install Homebrew if you. PostgreSQL is an open-source relational database management system (DBMS) for creating & maintaining the set of data & information for your application. Homebrew is a popular package manager for OS X. If you're new to PostgreSQL and facing issues configuring on your mac machine. How would you differentiate between a String, StringBuffer, and a StringBuilder? Which of the below generates a compile-time error? State the reason. What is a singleton class in Java? And How to implement a singleton class? Apart from the security aspect, what are the reasons behind making strings immutable in Java? What are shallow copy and deep copy in java? What part of memory - Stack or Heap - is cleaned in garbage collection process? What is the main objective of garbage collection? Difference between static methods, static variables, and static classes in java. ![]() Identify the output of the java program and state the reason. Is it possible that the ‘finally’ block will not be executed? If yes then list the case. Do final, finally and finalize keywords have the same function? Explain the use of final keyword in variable, method and class. A single try block and multiple catch blocks can co-exist in a Java Program. Comment on method overloading and overriding by citing relevant examples. Briefly explain the concept of constructor overloading How is an infinite loop declared in Java? Can you tell the difference between equals() method and equality operator (=) in Java? What are the default values assigned to variables and instances in java? ![]() What do you understand by an instance variable and a local variable? Can java be said to be the complete object-oriented programming language? Difference between Heap and Stack Memory in java. Why is Java not a pure object oriented language? ![]() Why is Java a platform independent language? ![]() Replacement Shower Screen Seals Shower Seal Ltd Quick and easy to fit - all fixings supplied Long lasting and flexible 900mm in length 14mm, 18mm, and 23mm soft rubber bottom seal A 45 degree plastic drip seal Suitable for glass 4mm to 8mm thick. Environmental protecting durable seal - will not turn yellow. WebBath shower screen seal for 4mm to 8mm glass. Rubber seal shower screen mean Screen Seal Strip, Rubber Plastic Bath Shower Screen Seal Strip. WebFind many great new & used options and get the best deals for Sealing Strip Screen Home Improvement Seal Strip Shower Silicone Silicone Rubber at the best online prices at eBay! Skip to main content. Removing the seal on a shower screen - MoneySavingExpert Forum How to install a Bi-fold shower seal in your shower screen track. uk: Shower Screen Rubber Seals 1-48 of over 1,000 results for "shower screen rubber seals" RESULTS Price and other details may vary based on product size … Web2m Rubber Silicone Bath Shower Screen Door Window Seal Strip Gap Curved Flat Home, Furniture & DIY, Bath, Showers, Baths & Parts eBay! Our range of shower seals can be installed both horizontally and vertically. Rubber Plastic Bath Shower Screen Door Seal Strip for Thickness … WebIf you are thinking of shower screen seal replacement, choose Melbourne Bathroom Shop. Because the seal is at the bottom, it naturally attracts water and dirt and can easily get very marked as a consequence.īath shower screen gap DIYnot Forums Web700 views, 5 likes, 2 loves, 0 comments, 0 shares, Facebook Watch Videos from DXND Radyo Bida News: BANTAYAN AFTERNOON EDITION APRIL 11,2023 Cleaning the rubber seal At the bottom of your glass however screen you’ve probably got a rubber seal that helps to stop water splashing out onto the floor.Luckily you can order a seal that is too long and cut it to size with a utility knife.2Pcs Shower Seal Transparent Rubber Strip Shower Bath Screen WebFind many great new & used options and get the best deals for Sealing Strip Screen Shower For Frameless Shower Door Seal Strip Silicone Rubber at the best online prices at eBay! Free shipping for many products! You will need the shower door bottom seal to be at least as long as the width of the door or you’ll be letting water out at the edges if it’s too short to span the entire length. The final measurement is the width of the door. If the door bottom seal is the exact length of the gap, there can be instances when water will squeeze its way through this tiny area. If you have a seal that is even 1/16″ longer than the existing gap, it will create an effective seal. You will need the seal to be slightly longer than this gap, but not by much. The gap that is below the door is of utmost importance as you search for the right door bottom seal. You will need to measure the gap between the bottom of the door and the surface beneath it, which might be the edge of the shower tile or sometimes just the floor itself. The right seal for your shower door bottom will be designed for the thickness of your specific door, so grab your tape measure or a ruler and determine this measurement as your first course of action.ĭon’t put that ruler away just yet. ![]() The thickness of your door will be important when you purchase the door bottom seal as they need to fit snugly on the glass since they have no hardware to keep them affixed. Shower door bottom seals are usually clear and made from a waterproof rubber or vinyl material. To save yourself from having to battle against this puddling with each and every shower you take, you are going to want to install a shower door bottom seal that will be almost invisible to the eye but it will kick all that water back into the drain where it belongs, instead of in the middle of your bathroom floor. This puddle is not only cold and uncomfortable to step in, but it is also a big safety hazard as it can create a slippery situation in the very spot you plan to step onto when you exit the tub. One major flaw with these showers doors, however, is that they need to have a gap below and around them so as to keep them from hitting the floor or walls next to them, which could cause them to chip or break.ĭue to this necessary gap, water can very easily find its way around or beneath the shower door and create a big puddle outside of the shower. ![]() The clear glass door lets you see the beautiful tile-work and fixtures in the shower which can oftentimes be as beautiful as the bathroom itself. Large glass shower doors are great at letting light into the shower and giving the bathroom a more open feeling. ![]() ![]() The film had a charity gala at the Carlton on. This movie was a lower budget production which was compared unfavorably with the wide-screen, technicolor version The Trials of Oscar Wilde. The attempted seduction scene was cut from the final version. Hurst's book: Heaven Can Help - the Autobiography of a Medium describes the day's filming at Walton Studios. Īuthor and former film extra Brian Edward Hurst gives a detailed description of a scene he witnessed during filming where Morley (as Wilde) attempted to pick up a newspaper boy on a foggy London street. They were both released in the last week of May 1960. This was one of two films about Wilde released in 1960, the other being The Trials of Oscar Wilde. The self-realisation of his homosexuality caused Wilde enormous torment as he. Edward Chapman as the Marquess of Queensberry The story of Oscar Wilde, genius, poet, playwright and the First Modern Man.The plot primarily focuses on the litigation surrounding Wilde's libel suit against the Marquess of Queensberry, and the subsequent accusation of Wilde's homosexuality. The film starred Robert Morley (as Oscar Wilde), Ralph Richardson, Phyllis Calvert and Alexander Knox. The film was directed by Gregory Ratoff and produced by William Kirby, from a screenplay by Jo Eisinger, based on the play Oscar Wilde by Leslie Stokes and Sewell Stokes. It is based on the play A Woman of No Importance by Oscar Wilde.Oscar Wilde is a 1960 biographical film about Oscar Wilde, made by Vantage Films and released by 20th Century Fox. The play itself is a loose retelling of the biblical story of King Herod and his execution of John the Baptist at the request of his stepdaughter, Salomé, whom he lusts after.Ī Woman of No Importance is a 1921 British drama film directed by Denison Clift. Salomé (1923), a silent film directed by Charles Bryant and starring Alla Nazimova, is a film adaptation of the Oscar Wilde play of the same name. This was a very famous play and was converted into a movie in the years 1917, 1918, 1945. It is based on the novel The Picture of Dorian Gray by Oscar Wilde. Durrant and starring Henry Victor, Pat O’Malley and Sydney Bland. The Picture of Dorian Gray is a 1916 British silent fantasy film directed by Fred W. It is based on Oscar Wilde’s 1893 play Lady Windermere’s Fan which was first played in America that year by Julia Arthur as Lady Windermere and Maurice Barrymore as Lord Darlington. Lady Windermere’s Fan is a 1925 American silent film directed by Ernst Lubitsch. ![]() It is the third screen version of the work, following a 1925 Ernst Lubitsch silent film and Otto Preminger’s 1949 adaptation entitled The Fan. The screenplay by Howard Himelstein is based on the 1892 play Lady Windermere’s Fan by Oscar Wilde. Joseph, Oscar Wilde, and László Vadnay.Ī Good Woman is a 2004 drama film directed by Mike Barker. Flesh and Fantasy tell three stories, unrelated but with a supernatural theme, by Ellis St. The making of this film was inspired by the success of Duvivier’s previous anthology film, the 1942 Tales of Manhattan. Robinson, Charles Boyer, and Barbara Stanwyck. The play had been filmed at least twice before, a 1916 silent film and a later adaptation by Ernst Lubitsch in 1925.įlesh and Fantasy is a 1943 American anthology film directed by Julien Duvivier, starring Edward G. The screenplay by Dorothy Parker, Walter Reisch, and Ross Evans is based on the 1892 play Lady Windermere’s Fan by Oscar Wilde. Wilde (1997) R 118 min Biography, Drama, Romance 6.9 Rate 70 Metascore The turmoil in poet/playwright Oscar Wildes life after he discovers his homosexuality. The Fan is a 1949 American drama film directed by Otto Preminger. The sexual liberation of the late 1960s and early 1970s provides a fitting backdrop for Dorian’s escapades in this version, and also the general clothing and fashion style of the era is extrapolated into a 1970s version of the aesthetic, decadent world of the 1890s novel. Directed by Massimo Dallamano, the film stresses the decadence and eroticism of the story and changes the setting to early 1970s London. The Picture of Dorian Grayĭorian Gray is a 1970 movie adaptation of Oscar Wilde’s novel The Picture of Dorian Gray starring Helmut Berger. This movie was remade in the year 1985, 1986, 1995. It starred Charles Laughton as a ghost doomed to haunt an English castle and Robert Young as his American descendant called upon to perform an act of bravery to redeem him. The Canterville Ghost is a 1944 fantasy/comedy film directed by Jules Dassin, loosely based on the short story of the same title by Oscar Wilde. Here are some movies based on Oscar Wilde’s stories. ![]() Vectornator truly feels affinity designer trace function free download a native Apple product. In addition to zffinity fonts, I made a coat of affinity designer bitmap trace free arms. It doesn’t look pretty but it will do a decent job of making rasters источник статьи vectors for you. This citation is automatically generated. Affinity Designer has the usual facilities for supporting layers, embedded fonts, graphics, photograph inclusion, and drawing. Trace CO2 capture by an ultramicroporous physisorbent with low water affinity. The trace is then saved as vector paths so it can be edited as used as a vector image. Find out more.Īffinity designer trace function free download – Please upgrade your browser to improve your experience. Learn more about Apple and Affinity updates. ![]() Only RON All our apps come продолжение здесь a day affinity designer trace function free download back guarantee.Īffinity Photo. Our latest major update is here Adobe flash cs5 free Affinity 1. ![]() Best in class for creating concept art, print projects, logos, icons, UI designs, mock-ups and more, our powerful design app is already the choice of thousands of professional illustrators, web designers and game developers who love its silky-smooth combination of vector and raster design tools.įrom books, magazines and marketing materials, to social media templates, website mock-ups and other projects, this next-generation publishing app gives you the power to combine your images, graphics and text to make beautiful layouts ready for publication. If it is not affinity designer trace function free download, your experience will be limited and you will be unable to purchase products, complete forms or load images and videos. The only real way to go about vector image tracing with Affinity Designer is to do so manually using the Pen Tool.You must enable JavaScript to fully view this webpage. This can be done by simply drawing individual elements right on top of your image, and then coloring them in using the Color Picker tool. Share Save 25K views 2 years ago Affinity is yet to include power tracing capabilities in their apps and we are anxiously waiting for it because it will happen. In fact, I created a video tutorial demonstrating how to do so: This method may be right for you if your image is simple enough to trace manually, or if you have something that needs to be traced with precision. The downside of using an automated tracing feature is that it very rarely traces over your image with absolute precision. Im aware there is a thread that has users requesting Auto Trace feature similar to Adobe Illustrator and some have suggested the Vectorization online web app as a work around. However, if your design is large and complex, then manually tracing it probably isn’t the best approach, or even possible for that matter. If this describes you then you may want to consider one of the other two solutions. Inkscape is a free and open source vector graphics editor that is similar to both Adobe Illustrator and Affinity Designer. Inkscape is a free and open source vector graphics editor.Īny regular visitor to this website is surely no stranger to Inkscape. I’ve used it as my preferred vector graphics tool for over a decade, and have served thousands of freelance clients with it. I know the feeling of hesitation that comes with downloading yet another application though - especially if it’s to use a really standard feature that wasn’t included in a product you purchased. I promise you though, Inkscape is worth a try. Believe it or not, it’s capable of far more than Affinity Designer is. Once you have Inkscape opened, all you have to do is import your image and open the Trace Bitmap menu by pressing Shift + Alt + B on your keyboard. From there the UI is pretty self-explanatory, but feel free to check out this tutorial I made in case you need help: The benefit of using this solution is that you’ll be able to make auto-generated vector tracings of your images using Inkscape’s powerful Trace Bitmap feature. Not only that, but Inkscape is the only vector graphics editor available on all three operating systems - Windows, Mac, and Linux. ![]() He was a member of Our Lady of the Valley Church in Pahrump, Nev. Prior to his retirement in 1998, George was manager of technical design with the Oneida Limited Silversmiths. Most of all he enjoyed his time spent with his family and had a great love of people. In his spare time he enjoyed off roading, four wheeling, landscaping and was a craftsman of many things. He was an avid gun owner who enjoyed his time on the firing range. Joseph’s Episcopal Church of Oneida and have shared a loving union of more than 35 years together. On OctoGeorge and Cheryl Sonich were united in marriage in St. George was a member of the National Guard from 1953 to 1967. and Eleanor (Ritzel) Mautner and was a graduate of Rome Free Academy. Mautner, 73, a former local resident and most recently of Pahrump, Nev., passed away peacefully early Sunday morning Jin the comfort of his son’s home surrounded by his loving and caring family. He was transported to Madison County Jail for centralized arraignment.SHERRILL - George J. Parmeter, 47, Canastota was arrested on a superior court bench warrant for criminal possession of a controlled substance third-degree: meth and sex offender failure to report change of address. She was transported to Madison County Jail for centralized arraignment.ĭavid M. Collier, 54, Hornell was arrested on a bench warrant for petit larceny. He was transported to Madison County Jail for centralized arraignment.ĭeborah A. McMullen, 32, Oneida was arrested on a bench warrant for assault third-degree, unlawful imprisonment second-degree, criminal obstruction of breathing and six counts of endangering the welfare of a child. She was transported to Madison County Jail for centralized arraignment. Lamb, 30, Oneida was arrested on a bench warrant for assault third-degree. He was transported to Madison County Jail for centralized arraignment. Durr, 27, Canastota was arrested on a bench warrant for resisting arrest. Bluewolf, 37, Oneida was arrested and charged with rape second-degree. Bragg, 52, of Oneida, was issued an appearance ticket for petit larceny.ĭakota T. He was transported to Madison County Jail for centralized arraignment.ĭaniel G. 08 of 1% or more and moved from lane unsafely. Fusillo, 53, Wampsville was arrested and charged with DWI: first offense, DWI w/ a BAC of. Farley, 38, Oneida was arrested and charged with burglary third-degree and petit larceny. Hopkins, 32, Oneida was arrested and charged with criminal possession of a controlled substance seventh-degree and criminal mischief fourth-degree. Shenandoah, 33, Oneida was arrested on a bench warrant for criminal possession of a controlled substance seventh-degree. Gerives Namutereza, 21, Utica was issued an appearance ticket for criminal trespass third-degree. Pudney, 33, Fayetteville was arrested and charged with DWAI drugs, aggravated unlicensed operation second-degree, unlicensed operator, criminal possession of stolen property fifth-degree and leaving the scene of an accident. She was arraigned in Oneida City Court and released on her own recognizance.ĭouglas E. Baggett, 24, Canastota was arrested on a bench warrant for petit larceny. ![]() Incorporation of fillers into high-performance polymers for improving their performance may further increase melt viscosity thus creating potential problems in achieving sufficient power to process the material and risking thermal/shear degradation of the polymer. The processing of high-performance polymers is generally more difficult and expensive compared with commodity thermoplastics due to their high melt viscosity and higher melting temperatures ( Golbang et al., 2020). ![]() Incorporation of expanded graphite (EG) into PEEK via twin-screw compounding and injection moulding, results in significant enhancement of PEEK electrical conductivity ( Mokhtari et al., 2021b). For example, addition of hydroxyapatite particles increases the bioactivity of PEEK for development of cranial implants with improved biocompatibility ( Manzoor et al., 2021). Nanofillers are added to polymers to further improve their thermal, mechanical and optical properties, depending on the type of filler ( Aradhana et al., 2018 Golbang et al., 2020 Mokhtari et al., 2021a). Apart from the intrinsic properties of the polymer, the applied manufacturing method, processing conditions, and the material composition play a major role on the final quality and properties of high-performance thermoplastic parts ( Golbang et al., 2017 Golbang et al., 2020 Liu and Kunc, 2020). Owing to their high thermal and chemical stability, exceptional strength-to-weight ratio, and recyclability, high performance thermoplastic polymers, such as Polysulfone (PSU), polyetherimide (PEI), and polyether ether ketone (PEEK) are becoming increasingly attractive in competition with metals and ceramics for load bearing applications under harsh operating conditions ( Wiesli and Özcan, 2015 Al Christopher et al., 2021). Therefore, incorporation of IF-WS2 nanoparticles into PEEK is a useful strategy to improve the mechanical performance of FDM PEEK. However, addition of just 1 wt% of IF-WS2 nanoparticles into PEEK increased the tensile strength and Young’s modulus of the FDM PEEK materials to similar levels to those achieved for unfilled injection moulded PEEK. ![]() ![]() In general, the lower mechanical properties of the 3D printed samples compared with the injection moulded ones are ascribed to poor interlayer bonding between the deposited layers and the presence of voids. This effect is ascribed to the increased inter-layer bonding of PEEK in the presence of IF-WS 2 nanoparticles in FDM. However, this increment was more noticeable in the 3D-printed nanocomposite samples, resulting in smaller gap between the mechanical properties of the 3D-printed samples and the injection moulded counterparts, in respect to pure PEEK, particularly at 1 wt% IF-WS 2. In general, incorporation of IF-WS 2 nanoparticles increased the mechanical properties of pure PEEK in both 3D printed and injection moulded samples. The 3D printed samples showed slightly higher crystallinity at each IF-WS 2 loading in relation to the injection moulded samples and extruded filaments, because of multiple reheating effect from subsequent layer deposition during FDM, causing recrystallization. The crystallization degree of PEEK increased with increasing loading of IF-WS 2 nanoparticles up to 1wt% and then declined at 2 wt%, due to lower level of particle dispersion in this sample. In general, a good distribution of nanoparticles was observed in PEEK, although larger agglomerates were visible at 2 wt% IF-WS 2. To compare the impact of the two processing methods and the incorporated nanoparticles on the morphology, crystallization and final mechanical properties of the nanocomposites, SEM, DSC and tensile testing were performed. In this study, PEEK nanocomposites with 0, 0.5, 1, and 2wt% IF-WS 2 were manufactured by injection moulding and Fused Deposition Modelling (FDM). Ulster University, Jordanstown, United Kingdom.Atefeh Golbang, Mozaffar Mokhtari, Eileen Harkin-Jones*, Edward Archer and Alistair Mcilhagger |
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