By Kevin Townsend, Carles Cufí, Akiba, Robert Davidson
With Bluetooth Low strength (BLE), shrewdpermanent units are approximately to develop into even smarter. This sensible consultant demonstrates how this intriguing instant know-how is helping builders construct cellular apps that percentage facts with exterior undefined, and the way engineers can achieve effortless and trustworthy entry to cellular working systems.
This booklet offers a great, high-level review of ways units use BLE to speak with one another. You’ll research worthwhile inexpensive instruments for constructing and trying out BLE-enabled cellular apps and embedded firmware and get examples utilizing a number of improvement platforms—including iOS and Android for app builders and embedded structures for product designers and engineers.
know the way facts is prepared and transferred by means of BLE devices
discover BLE’s ideas, key obstacles, and community topology
Dig into the protocol stack to know how and why BLE operates
find out how BLE units notice one another and identify safe connections
organize the instruments and infrastructure for BLE software development
Get examples for connecting BLE to iPhones, iPads, Android units, and sensors
enhance code for an easy gadget that transmits center cost facts to a cellular device
Read Online or Download Getting Started with Bluetooth Low Energy: Tools and Techniques for Low-Power Networking PDF
Best computing books
Http://www. packtpub. com/postgis-to-store-organize-manipulate-analyze-spatial-data-cookbook/book
Integrate PostGIS with net frameworks and enforce OGC criteria equivalent to WMS and WFS utilizing MapServer and GeoServer
Convert 2nd and 3D vector facts, raster information, and routing facts into usable forms
Visualize facts from the PostGIS database utilizing a computer GIS application equivalent to QGIS and OpenJUMP
Easy-to-use recipes with complicated analyses of spatial facts and useful applications
What you'll study from this book
Import and export geographic information from the PostGIS database utilizing the to be had tools
Structure spatial facts utilizing the performance supplied by way of the combo of PostgreSQL and PostGIS
Work with a suite of PostGIS capabilities to accomplish uncomplicated and complex vector analyses
Connect PostGIS with Python
Learn to exploit programming frameworks round PostGIS
Maintain, optimize, and fine-tune spatial information for long term viability
Explore the 3D services of PostGIS, together with LiDAR aspect clouds and element clouds derived from constitution from movement (SfM) techniques
Distribute 3D types throughout the net utilizing the X3D standard
Use PostGIS to strengthen robust GIS internet functions utilizing Open Geospatial Consortium internet standards
Master PostGIS Raster
PostGIS is a spatial database that integrates complicated garage and research of vector and raster facts, and is remarkably versatile and robust. PostGIS offers help for geographic gadgets to the PostgreSQL object-relational database and is at the moment the preferred open resource spatial databases. for you to discover the entire diversity of PostGIS concepts and disclose the comparable extensions, this booklet is a must-have.
This ebook is a deep-dive into the entire variety of PostGIS issues, with sensible purposes of the innovations and code. it's a finished consultant on PostGIS instruments and ideas that are required to control, control, and examine spatial facts in PostGIS. This ebook is filled with systematic directions of hands-on examples and in-depth reasons. Even for knowledgeable clients, this e-book will function an excellent resource of reference through delivering new methods of operating with PostGIS during the book's easy-to-follow approach.
This hands-on advisor seems to be at key spatial facts manipulation initiatives, explaining not just how each one job is played, but additionally why. It presents functional assistance permitting you to securely make the most of the complicated know-how in PostGIS so as to simplify your spatial database management tasks.
This sensible e-book may help you're taking benefit of uncomplicated and complicated vector, raster, and routing methods. you'll learn how to use the thoughts of knowledge upkeep, optimization, and function, that allows you to assist you to combine those right into a huge surroundings of machine and internet tools.
With this accomplished consultant, you may be armed with all of the instruments and directions you must either deal with the spatial database procedure and make greater judgements as your project's standards evolve.
An easy-to-use consultant, filled with hands-on recipes for manipulating spatial information in a PostGIS database. every one subject is defined and positioned in context, and for the extra inquisitive, there are extra info of the thoughts used.
Who this booklet is for
If you're a net developer or a software program architect, in particular in location-based businesses, and wish to extend the diversity of suggestions you're utilizing with PostGIS, then this ebook is for you. you'll have a few previous adventure with PostgreSQL database and spatial options.
Hands-on troubleshooting tools at the most up-to-date unlock of SQL Server
The 2012 liberate of SQL Server is the main major one seeing that 2005 and introduces an abundance of latest beneficial properties. This severe publication presents in-depth assurance of most sensible practices for troubleshooting functionality difficulties in keeping with a great knowing of either SQL Server and home windows internals and exhibits skilled DBAs easy methods to make certain trustworthy functionality. The workforce of authors exhibits you ways to grasp using particular troubleshooting instruments and the way to interpret their output so that you can fast determine and unravel any functionality factor on any server working SQL Server.
• Covers the middle technical themes required to appreciate how SQL Server and home windows will be operating
• stocks most sensible practices so you know the way to proactively display screen and steer clear of difficulties
• exhibits tips on how to use instruments to fast assemble, examine, and successfully reply to the resource of a system-wide functionality issue
Professional SQL Server 2012 Internals and Troubleshooting allows you to speedy get to grips with the adjustments of this generation for you to most sensible deal with database functionality and troubleshooting.
Through the first week of September 1999, the second one EvoNet summer season institution on Theoretical facets of Evolutionary Computing was once held on the Middelheim cam pus of the college of Antwerp, Belgium. initially meant as a small get jointly of PhD scholars attracted to the idea of evolutionary computing, the summer time tuition became a profitable mixture of a four-day workshop with over twenty researchers within the box and a two-day lecture sequence open to a much wider viewers.
Dieses Lehrbuch ist eine Einfuhrung in die Techniken des sog. tender Computing und verwandter formaler Methoden. Dargestellt werden Zellularautomaten und Boolesche Netze, Evolutionare Algorithmen sowie Simulated Annealing, Fuzzy-Methoden, Neuronale Netze und schlie? lich Hybride Systeme, d. h. Koppelungen verschiedener dieser Techniken.
- Linux Firewalls: Attack Detection and Response with iptables, psad, and fwsnort
- Grundkurs Geschäftsprozess-Management: Methoden und Werkzeuge für die IT-Praxis: Eine Einführung für Studenten und Praktiker (German Edition)
- High Performance Computing and Communications: Third International Conference, HPCC 2007, Houston, USA, September 26-28, 2007. Proceedings
- Computing: A Business History
- Exploring Data with RapidMiner
Additional info for Getting Started with Bluetooth Low Energy: Tools and Techniques for Low-Power Networking
The first method requires two steps: first scanning and then connecting directly to a device (by specifying its Bluetooth Address) detected during the scanning phase. The second method skips the explicit scanning step and instead uses the controller to select one or more devices to connect to, without previous knowledge of whether they are actually nearby. Additional GAP Procedures GAP defines a few other procedures that are relevant only to already established con‐ nections, and which are commonly used: 42 | Chapter 3: GAP (Advertising and Connections) Name discovery procedure Advertising packets can carry many different types of user data, including the Device Name: a UTF-8 string containing a human-readable description of the device (sim‐ ilar to a network hostname).
Link Layer | 19 Figure 2-3. Advertising and scanning The scan interval and scan window parameters define how often and for how long a scanner device will listen for potential advertising packets. As with the advertising in‐ terval, those values have a deep impact on power consumption, since they directly relate to the amount of time the radio must be turned on. The specification defines two basic types of scanning procedures: Passive scanning The scanner simply listens for advertising packets, and the advertiser is never aware of the fact that one or more packets were actually received by a scanner.
The advertiser receives it and responds with a Scan Response packet. This additional packet doubles the effective payload that the advertiser is able to send to the scanner, but it is important to note that this does not provide a means for the scanner to send any user data at all to the advertiser. Figure 2-4 illustrates the difference between passive and active scanning. 20 | Chapter 2: Protocol Basics Figure 2-4. Active and passive scanning Advertising packet types can be classified according to three different properties.