Proceedings of the International Astronautical Congress, IAC | Year: 2016
The proposed paper intends to present the design of a re-usable lunar SSTO (single stage to orbit) vehicle called RLRV (Re-usable Lunar Resupply Vehicle). This vehicle should be able to be refueled in Moon orbit or on the Moon surface and reused. In its baseline version, it should be able to land payload masses up to 9 metric tons on the Moon and perform re-supply missions. It should also have the capability to launch payloads from lunar surface into lunar orbit in contemplation of their return back to Earth. These requirements are the results of the preliminary design of a set of missions and of the definition of the corresponding mission scenarios in the frame of the ROBEX (Robotic Exploration under Extreme Conditions) project. One important aspect of the ROBEX project is to consider modularity and reconfigurability for the design of the ground infrastructure in order to increase its sustainability. This characteristic should also be considered for the choice of the architecture and the design of the transportation system in order to perform a large range of missions with the designed vehicles. It has been chosen to consider liquid oxygen and liquid hydrogen as propellant for the RLRV, despite the difficulty to keep these propellants at cryogenic temperatures for the duration of the mission. Oxygen can be extracted from the Moon regolith. One of the missions pre-sized for ROBEX considers the robotic settlement and operation of an ISRU (In-Situ Resource Utilization) plant to extract O2 from ilmenite. On the fuel side, the mass of liquid hydrogen required is relatively limited, compared to those of other fuels such as kerosene or methane. The fuel cannot be gathered or synthetized on the Lunar surface and will have to be brought from Earth, increasing the interest to limit as much as possible the fuel mass. A preliminary sizing of the vehicle including for instance the design of the structure and of the feed and propulsion systems, as well as trajectory simulations has been performed. In order to assess the advantages and drawbacks of the re-usability of the RLRV, it is compared to a classic expendable vehicle for different mission scenarios. The influence of the re-usability of the lunar re-supply system on the whole Earth-Moon transportation system will then be discussed. Copyright 2016 by DLR-SART.
News Article | May 30, 2017
For many, the Android home screen is simply a place to interact with their phone: Place launchers, interact with Google Assistant (or Now, depending upon your release), and not much more. For others, however, the home screen launcher is a way of life—or, at least, a way to make mobility an efficient day-to-day experience. A quick glance at the Google Play Store and you'll find a bevy of different launchers available. Of that list, which one is right for you? And how do you know which one is right for you? I've used many of the launchers, found on the Google Play Store, which I consider to be of relevance to business-class users. Of those launchers, I've narrowed my choice down to what I consider to be the five best in class. What makes a home screen launcher best in class? I used three categories for this comparison: With those in mind, let's take a look at the five home screen launchers I believe are best suited to handle your busy day. Of all the launchers I've used, it seems I always return to the default Google Now Launcher. With this particular home screen launcher, you get the best return on each of my three categories. One of the reasons why I constantly find myself drawn back to the Google Now Launcher is that, above all other launchers, it does not get in the way of daily usage; it works with an incredible level of performance, to make interacting with your apps and device as simple as possible. The Google Now Launcher interface is exceptionally clean (Figure A) and offers very little in the way of learning curve. For anyone looking to get the most out of their launcher, while putting in the least amount of work, Google Now Launcher is for you. The thing about Search Launcher is that you have to understand what it is attempting to accomplish. Instead of the standard launchers and app drawer, the interface serves as a sort of universal search tool, where you can search the web, your apps, and your contacts. Once you get beyond the idea that a home screen launchers should consist of icons that launch apps and a drawer to give you access to your full complement of software, you'll see just how efficient Search Launcher is. The Search Launcher home screen (Figure B), may seem a bit confusing at first, but once you realize it serves as a means to search the things you use most, it becomes clear just how efficient and easy to use this launcher is. If you like the Google Now Launcher, but wish it offered a few more bells and whistles, then Evie Launcher is exactly what you want. Imagine the Google Now Launcher with the ability to swipe down to get a listing of your recent app launch results (Figure C) or to gain more control over gestures, hide apps, and so much more. That is what Evie Launcher offers. Evie Launcher is what Google Now Launcher would be if the developers included just enough extra configuration options to make it customizable enough, without getting bogged down in a widespread feature set. Evie Launcher is every bit as efficient and user-friendly as Google Now Launcher, with a bit more panache. Ask any Android power user and they will, at some point, have made Nova Launcher their default home screen launcher. Why? Because it offers one of the best ratios of power and efficiency you will ever find in a launcher. Nova Launcher includes a vast amount of configurations, while at the same time keeping things simple (Figure D). If you're concerned all of those options will cause the launcher to take a hit in the performance category, do not concern yourself. Nova Launcher is one of the smoothest launchers on the market. One of the best features of Nova Launchers is found in the Prime edition; that feature is gestures. You can configure a number of gestures to do things like open specific apps, expand notifications, open recent apps, search for apps, open Google Assistant, lock your screen, toggle Dock, and so much more. Finally, Nova allows for Google Now integration, so you can say "OK Google" from your homescreen, without having to touch your device. If there's one feature the Google Now Launcher could use, it would be a scrollable dock. Guess what? Apex Launcher gives you that (and more). Although the default home screen for Apex Launcher (Figure E) doesn't veer too far away from the Google Now standard, there's quite a bit under the hood. A number of the Apex Launcher's options are by way of effects and transitions, but you do gain the addition of app hiding, "OK Google" integration, scrolling dock, considerable App Drawer configurations, and much more. Don't worry if you're not one to put too much time into customizing your home screen, the Apex Launcher default is quite an efficient means of interacting with your device. Whether you're looking for the simplicity of the Google Now launcher or the available complexity of Nova Launcher (or anything in between), there are homescreen launchers to be had that will satisfy any need. However, if you're looking for the best combination of efficiency, ease of use, and performance, you cannot go wrong with any of the above apps.
News Article | September 29, 2016
On the fence about whether your child is old enough for their own smartphone? A new app called Luna Launcher can help you warm to the idea, by offering a simple way to limit access to select apps and actions, including who they can call or text – a list you can restrict to family members, for example. Of course, because of the way it needs to interact with your phone’s operating system in order to restrict access, Luna Launcher is only available on Android. One of Android’s advantages over iPhone is that it permits the use of launchers, which allow you to entirely customize the Android experience, whether that’s access to apps, as with these kid launchers, or just with new themes and layouts. iPhone, on the other hand, requires parents to look down apps and other activities using parental controls. Today, there are a good handful of kid-friendly launchers for Android smartphones. However, some are focused on littler children or providing access to educational content or games, instead of just being a smart utility. Luna Launcher, on the other hand, is appropriate for toddlers to preteens, as all it does is lock down access to apps and actions, like who they can call and text. In other words, if you don’t want your 10-year old spending all day texting friends, but want them to have a way to reach mom or dad in an emergency, Luna could be a good fit. To get started, you create your child’s profile, pick the apps you’ll allow them to use, then choose the shortcuts you want to add, like those to message mom, call dad, etc., by selecting from your contact list. These actions can also including calls and texts from third-party apps like WhatsApp, Skype or Messenger. When setup is complete, you can further customize the launcher experience by turning on or off the weather, picking a color for your theme, or choosing to disable access to the status bar and notification area. You can also set daily quotes in Luna, and track usage. One especially nice feature is the custom YouTube player that’s built-in. From the settings, you can configure very limited access to YouTube by adding only individual videos to the launcher’s homescreen, playlists, or favorite YouTube channels. This prevents the child from being able to surf across YouTube, where they might encounter more adult content. (You could also add the YouTube Kids app as one of your applications, if you’d rather not take the time to customize access so specifically.) “The product comes from my real problem,” explains Hoa Le, one of Luna’s two indie developers, based in Vietnam. He says when he bought a new tablet, he decided to hand down his old Nexus 7 tablet to his son since. “A few months later, I found out that my 5 year-old son spent too much time on the device, mostly playing games. I was struggling to find an app that helps me to set up a kind of ‘parental control’ on the device,” he says. He and a college friend decided to build Luna as a side project for their own use, which is why the app is currently free. Unfortunately, during testing, I found that after exiting the parental control screens, Luna would sometimes stop responding to presses. This was only fixed by rebooting the phone. Others don’t seem to have the same issue, so your mileage may vary. Hopefully, it’s a bug that will be addressed in a future update. Luna Launcher is live now on Google Play and will be available on the Amazon Appstore soon.
Acta Astronautica | Year: 2010
The paper describes the vision and potential roadmap alternatives of an ultrafast intercontinental passenger transport based on a rocket powered two-stage reusable vehicle. An operational scenario and the latest technical lay-out of the configuration's preliminary design including flight performance are described. The question of how the revolutionary ultrafast transport can be realized is addressed by an assessment of the different technological and programmatic roadmap alternatives. © 2010 Elsevier Ltd. All rights reserved.
Launcher | Date: 2013-05-30
A line launcher (110) capable of firing a projectile (117) and an attached line (125) up to about 70 metres. It has a barrel (113) large enough for a resilient projectile attached to a line. It has a pre-charge chamber capable of storing a pressurised gas from a pressurised gas cartridge. A trigger mechanism vents the gases in this pre-charge chamber into the barrel to expel the projectile and line. Gas from the pressurised gas cartridge (e.g. a CO_(2 )bulb) is released slowly enough to pressurise the pre-charge chamber but without the cartridge freezing as might occur if the gas was discharged directly from the cartridge into the barrel to directly propel the projectile.
News Article | February 15, 2017
One of the mainstays for the Android home screen, Google Now Launcher, is reportedly saying "Goodbye World." It is rumored that, as of March 1, 2017, the popular home screen launcher will no longer be available on the Google Play Store. The reasons why Google is discontinuing this outstanding launcher are unclear. An anonymous tipster from within Google posted this on the firstname.lastname@example.org mailing list: The email (which you can see below) explains that the Search Launcher Services library for OEMs that has been in testing is now available. This library is that same one used by certain OEMs (such as Sony) to integrate Google Now into their own home screen launchers. Now that the Search Launcher Services library is available, all OEMs can add Google Now to their home screen launchers...so the need to have the official Google Now Launcher available might be seen as a redundancy by Google. Couple that with the release of the Pixel Launcher, and Google feels it's time to let go of their aging Launcher. If you ask the public, this is a mistake. The Google Now Launcher is one of the best ways to get a pure Google experience on Android. If you own one of the much-lauded Google Pixel phones, you know the native home screen launcher is fantastic and is also one of the most elegant-looking launchers for Android. The key features for Pixel Launcher include: If you don't own a Pixel phone and open the Google Play Store on your non-Pixel device and search for Pixel Launcher, you'll see that your device isn't supported. It seems Google is leaving everyone else out, but there's a way around this: You can side-load Pixel Launcher on a non-Pixel device. Before doing that, please note: Even though all of the features will not work, Pixel Launcher is still worth installing, especially if you're a fan of Google Now Launcher. It's very rare for me to encourage side-loading an application; it's not a best practice, and it should only be done with applications you're certain are okay. The source for the apk to be installed is APKMirror, a site run by the reputable and highly respected Android Police, so the Pixel Launcher apk is good to go. Download the apk file on your Android device. While the file is downloading, open Settings and go to Security. Within the Security window, enable Unknown Sources (Figure A). Swipe down your notification shade and tap the entry that indicates the download has completed. If you don't see that, open your device's file manager app and navigate to Downloads. Locate and tap the file com.google.android.nexuslauncher_XXX_apkmirror.apk (XXX is the release number). When prompted, tap Install (Figure B), and the apk file installation will complete. The next time you press the Home button you'll be asked which launcher to use—tap Pixel Launcher and tap ALWAYS. You'll be greeted by your new Google-powered launcher (Figure C). You're ready to start working with this worthy replacement for the Google Now Launcher. Although it doesn't offer all the features found when used in conjunction with the Pixel phone, it does a great job as a drop-in replacement for the launcher Google is leaving behind. Pixel Launcher will not show up in the Play Store on your device. If you want to check for updates, you must head back over to the APKMirror site, search for Pixel Launcher, and download any newer files.
News Article | July 16, 2015
News Article | July 16, 2015
News Article | June 29, 2015
Presentation created by Investment Manager from the Slovak startup and innovation studio. Experienced Launcher's team member, Michal Nešpor, held the speech at Startup Pirates event in Bratislava: worthful overview and explanation from the investment universe. The important aim of the presentation was to show aspiring entrepreneurs what is the business side of startups and how to understand terms as pitch, crowdfunding and investor's mindset. The worldwide event Startup Pirates is focused on such topics, at most to show new projects how to develop a business idea successfully.
News Article | May 28, 2015
CEO of the startup studio Launcher, Viktor Mikulasek, presented at the Mobcon conference in Bratislava, Slovakia. The aim was to clarify all opportunities for potential startups where to look for reliable investors.