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Questions tagged [data-transfer]

Data transmission, digital transmission, or digital communications is the physical transfer of data (a digital bit stream) over a point-to-point or point-to-multipoint communication channel.

Data transmission, digital transmission, or digital communications is the physical transfer of data (a digital bit stream) over a point-to-point or point-to-multipoint communication channel.

Examples of such channels are copper wires, optical fibres, wireless communication channels, storage media and computer buses. The data are represented as an electromagnetic signal, such as an electrical voltage, radiowave, microwave, or infrared signal.

While analog transmission is the transfer of a continuously varying analog signal, digital communications is the transfer of discrete messages. The messages are either represented by a sequence of pulses by means of a line code (baseband transmission), or by a limited set of continuously varying wave forms (passband transmission), using a digital modulation method. The passband modulation and corresponding demodulation (also known as detection) is carried out by modem equipment. According to the most common definition of digital signal, both baseband and passband signals representing bit-streams are considered as digital transmission, while an alternative definition only considers the baseband signal as digital, and passband transmission of digital data as a form of digital-to-analog conversion.

Data transmitted may be digital messages originating from a data source, for example a computer or a keyboard. It may also be an analog signal such as a phone call or a video signal, digitized into a bit-stream for example using pulse-code modulation (PCM) or more advanced source coding (analog-to-digital conversion and data compression) schemes. This source coding and decoding is carried out by codec equipment.

Wikipedia: http://en.wikipedia.org/wiki/Data_transmission

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The best technology to synchronize data between different database schemas?

I have an existing SQL Server 2005 database that runs our accounting/inventory application. We are looking at using a new on-line ordering framework - which has it's own database. If we use this new framework, we will need to transfer the on-line…
Clinemi
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Using shader for calculations

Is it possible to use shader for calculating some values and then return them back for further use? For example I send mesh down to GPU, with some parameters about how it should be modified(change position of vertices), and take back resulting…
Raven
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How to transfer "data" between two device (android,iphone)?

How can i transfer data between two device? I would like to transfer data (mostly image file) between different platforms (android,iphone). Is it possible to use p2p or should i use client-server? Any help will be appreciated.
Parvin Gasimzade
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Transferring data using ultrasound

Yamaha InfoSound and ShopKick application use technologies that allow to transfer data using ultrasound. That is playing an inaudible signal (>18kHz) that can be picked up by modern mobile phones (iOS, Android). What is the approach used in such…
alexey
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JSON Syntax: Transmitting an array

A valid JSON Syntax is something of the kind: { "username": "admin", "password": "123" } But what if I want to transmit an array of 'users' (given the example), instead of a single 'user' ? Is the code below Valid JSON, according to the…
Andreas Grech
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How to pass custom class instances through Web-Workers?

Since Web-Worker JSON serialize data between threads, something like this doesn't work: worker.js function Animal() {} Animal.prototype.foobar = function() {} self.onmessage = function(e) { self.postMessage({animal: new Animal()}) …
Martin Broder
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Maximum data size when sending data via BTLE on iOS

I am currently implementing an iOS application that uses CoreBluetooth to transfer data between 2 devices. For example, to send data from the central to the peripheral, I use this code: NSData *data = [NSJSONSerialization…
BlackWolf
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jQuery pass element to dataTransfer property

Trying to pass a jQuery object to the dataTransfer property during a drag/drop sequence. After adding the property to jQuert.event.props array I'm able to assign it, but it returns undefined on during the drop event. Not sure what I'm missing here-…
technopeasant
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How to download a big file directly to the disk, without storing it in RAM of a server and browser?

I want to implement a big file downloading (approx. 10-1024 Mb) from the same server (without external cloud file storage, aka on-premises) where my app runs using Node.js and Express.js. I figured out how to do that by converting the entire file…
Mike
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JS: Drag and Drop DataTransfer Object does not work on Safari. Alternative?

I have the following code. It creates a new FileList to edit a FileList Objekt of an File Input to allow me to create a list of all the files the user wants to upload and give him the option to delete or reupload some of them: function…
Nicolas Mierbach
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Take picture with iPhone API and transfer it to a server

I have written an cocoa application to take a picture on the iPhone. I need to transfer the images taken to somewhere besides the iPhone namely another server. Does anyone know how I can accomplish this? Thanks, Joe
Atma
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iOS - MTU Size for BLE data transfer between iOS device and External Accessory(BluetoothWatch)

I'm Working on iOS Application(Objective-C) for Bluetooth watch which using BLE(CoreBluetooth), and my watch is having GATT Bluetooth Profile, iOS application minimum support is from iOS7. I wants to know How can we do data transfer between iOS…
RayofHope
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dataTransfer is null when creating drag event programmatically

I am trying to create a dragEvent and fire it programmatically using this code on Chrome: var ev = document.createEvent("MouseEvents"); ev.initEvent("dragstart"); and then fire it this way: element.dispatchEvent(ev); The element has draggable…
Assaf
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How can a C# app easily communicate and transfer files on a network?

How can a C# app easily communicate with an instance of itself present on another computer, which is on the same network, and transfer files and data? Assuming the computers on the network have fixed local IP addresses, and they each know each…
Robin Rodricks
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What's the best way to send a file over a network using C#?

Can anyone point me to a tutorial on the best way to open a connection from client to server, read in a binary file and send its contents reliably across the network connection? Even better, is there an open source library that already does this…
screenglow
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