Es raro ver entonces un captcha como el siguiente:

Se ve bastante simple, incluso para una persona, por lo que en primera instancia uno creería que los spammers la tienen fácil, porque el texto se ve de manera plana. Pero no es así. Al ver el código fuente, nos damos cuenta que el Captcha es engañoso, porque utiliza una mezcla de CSS y HTML

Parece una idea excelente. Al ser HTML y CSS puros, no se puede utilizar un programa OCR para identificar los caracteres, y tampoco se puede capturar el código para enviarlo a un servicio de reconocimiento de captchas con personas.

Pero los Spammers nunca duermen

Aunque la idea parece excelente, en realidad no lo es. El Captcha está hecho de etiquetas bold (< b>) de un pixel de ancho que se muestra mediante CSS. Algunas etiquetas están coloreadas y otras no. El resultado es un montón de puntitos que juntos parecen una imagen para el ojo humano, tal como el servicio que permite pasar una imagen a caracteres.

Pero un pequeño código permite mostrar el captcha como imagen y pasarlo por un programa de reconocimiento de caracteres. De este modo, se pueden usar bots para llenar el servicio de spam. No voy a poner el código porque seguro que no les interesa, el punto es que saltarse este tipo de catpchas es más facil que descargar windows 7 desde Reparación de PC. Sí, así de fácil.

La moraleja de esto es que mientras un humano pueda resolver un captcha, una máquina podrá hacerlo también. Hasta que a alguien no se le ocurra un método mejor de filtrar el spam, estamos jodidos.

Alternatively, Internet Explorer 8′s new InPrivate browsing feature allows users to browse the internet without recording information from visited sites (including cookies). To use InPrivate mode:

Click “Safety” on the Command bar
Select “InPrivate Browsing”
Internet Explorer 7.x
Exit Internet Explorer 7, and then exit any instances of Windows Explorer
Click Start, click Run, type inetcpl.cpl, and then press ENTER
On the General tab, click Delete under Browsing History in the Internet Properties dialog box
In the Delete Browsing History dialog box, click Delete Cookies
In the Delete Cookies dialog box, click Yes.
Internet Explorer (all other versions)
Internet Explorer saves cookies in more than one location, depending on the version of the browser and the version of Microsoft Windows being used.

The best way to find and delete them is to close Internet Explorer then use your file management software (such as Windows Explorer) and search for a folder called ‘cookies’.

AOL 8 and 9
Sign on and select Settings from the toolbar.
Version 9.0 users should select the By Category tab and click the Internet Options link, while for Version 8.0 and below click Internet Properties (WWW).
Click Settings.
Note: Windows Vista will see more than one Settings button. Click the button in the Browsing history section.
Click View Files. Your list of cookies (plus your other temporary internet files) will be displayed.
If you wish to delete any of the cookies or files, right-click on them and choose Delete.

Mozilla
Choose Cookie Manager from the Tools menu.
Choose Manage Stored Cookies.
Remove any cookie from the list, or remove all cookies.

Mozilla Firebird
Click on Tools, then Options
Select the Privacy icon in the left-hand panel
Click on Cookies
Click on Stored Cookies
To remove a single cookie click on the entry in the list and click on the Remove Cookie button
To remove all cookies click on the Remove All Cookies button
Mozilla Firefox
Click on Tools, then Options (or Edit | Preferences on Linux)
Select Privacy
In the Cookies panel, click on Show Cookies
To remove a single cookie click on the entry in the list and click on the Remove Cookie button
To remove all cookies click on the Remove All Cookies button

Netscape Navigator 7.x

Choose Cookie Manager from the Tools menu.
Choose Manage Stored Cookies.
Remove any cookie from the list, or remove all cookies.

Netscape Navigator 6.x
Choose Cookie Manager from the Tools menu.
Choose Manage Stored Cookies.
Remove any cookie from the list, or remove all cookies.
Netscape Navigator 4.x
In Netscape, all cookies are stored into one file, called Cookies.txt, in the user preferences folder, making them easy to find and delete. The folder can be located by using your file management software to search your hard disk drive for “cookies.txt”.

Users of Netscape Navigator 4.x may also stop cookies from being written to the hard drive, by making the cookies file read only. However, even if the browser can’t “write” cookies to the hard drive, it can still cache them, and it may create a new cookie file.
Opera
To delete all cookies at the end of every session, select it in the privacy settings under Tools > Preferences.
Click on Manage cookies to delete specific cookies or cookies from specific domains.

To delete all cookies immediately, go to Delete private data on the Tools menu.
Deepnet Explorer 1.1+
Choose Tools and then Internet Options
Click the Privacy tab
Move the slider to choose your preferred settings.

Apple Macintosh
Microsoft Internet Explorer 5 (MacOS X)
Choose Preferences from Explorer menu
Select Receiving Files options
Select Cookies
Select the Cookies to be deleted from the list
Press Delete button
Microsoft Internet Explorer 5 (MacOS 9)
Choose Preferences from Edit menu
Select Receiving Files options
Select Cookies
Select the Cookies to be deleted from the list
Press Delete button
Mozilla
Choose Cookie Manager from the Tools menu.
Choose Manage Stored Cookies.
Remove any cookie from the list, or remove all cookies.

Netscape Navigator 7.x
Choose Cookie Manager from the Tools menu.
Choose Manage Stored Cookies.
Remove any cookie from the list, or remove all cookies.
Netscape Navigator 6.x
Choose Cookie Manager from the Tools menu.
Choose Manage Stored Cookies.
Remove any cookie from the list, or remove all cookies.
Safari 1.0 (MacOS X)
Choose Preferences from Safari menu
Select Security icon
Press Show Cookies button
Select the Cookies to be deleted from the list
Press Delete button

Opera
To delete all cookies at the end of every session, select it in the privacy settings under Opera > Preferences
Click on Manage cookies to delete specific cookies or cookies from specific domains.

To delete all cookies immediately, go to Delete private data on the Tools menu.

Other
WebTV
From the Home page, select Help
Select Utilities Tool
Select Reset Cookies
Power off the WebTV for 60 seconds
Cookies should be deleted when you turn the WebTV back on again
MSNTV2
From the Home page, select Settings
Select Web Appearance and Security
Select Delete Cookies

Difficulty: Moderate
Instructions
Things You’ll Need:

TV
Video cables
DVR player
Recordable DVD disc (such as DVD + R/RW)
DVD player

Record From DVR to DVD

1  Record the show first on the DVR as you normally would.

2 Turn on everything including the DVR, DVD player and the television.

3 Connect an S-Video cable from the DVD player to the DVR player. The cable will be red and white.

4 Change the inputs on the DVD player. Since you are using an S-video input, the correct setting would be L1.

5 Change the TV setting to match the settings of your DVD. If you are watching what you are recording, the setting on the TV should be “Video 2.”

6 Play the show back to test that all the cables are connected correctly and the inputs are congruent with each other. If while playing back you can hear and see your show, you are good to proceed. If not, check your cables and make sure the inputs agree.

7  Place a DVD + R/RW disc into your DVD player.

8 Set the recoding time according to the DVR instructions. Two hours of recording time is usually a safe amount of time, unless quality is not your number one priority. For example, a show you do not plan on keeping or a sporting event you will simply watch once and tape over would be conducive to longer recording times. Otherwise the 2-hour setting will give you the best quality you can expect, and it should mirror the quality of the original DVR recording.
9 Push “Play” on the DVR player and “Record” on the DVD player. If you want to build a playlist of shows or record multiple shows, simply push “Stop” on the DVD player while you set up each new recording.

Tips & Warnings

If you plan on doing this often, consider purchasing an additional DVD player that is set up especially for this purpose since you will not be able to watch DVDs with this setup. You would need to constantly switch the cables and change the inputs with only one DVD player.

Comments

on 2/23/2010 you say “since you will not be able to watch DVDs with this setup. ” ?? and then you say “If while playing back you can hear and see your show, you are good to proceed. ” If the audio video signal is passing through the recorder to the TV ,then you CAN use that set up to PLAY DVDs. Your article is full of miss leading mistakes.

______________________________________________

If you own a Digital Video Recorder, such as TiVo, or a DVR from a Cable or Satellite provider, then you know you can record to the device’s hard drive to view TV shows at a later time, much like the old VCR. However, saving those TV shows becomes difficult as the Hard Drive starts to fill up. The answer to saving your shows is to record them to DVD! This can be accomplished easily by hooking up a DVD Recorder to your DVR.

Difficulty: Easy

Time Required: Depends on length of source video

Here’s How:

Record a TV show on your DVR that you want to save to DVD!
Turn on the DVR, DVD Recorder and the TV that the DVD Recorder is connected to. In my case, I have my Samsung DVD Recorder (no hard drive) hooked up to my TV via an RCA Audio/Video cable from the rear outputs on the DVD Recorder to the rear RCA inputs on my TV. I use a seperate DVD Player for playing DVDs, but if you use your DVD Recorder as a player as well, use the best cable connections you can to connect to the TV. See the article Types of A/V Cables for more info.
Connect an S-Video or RCA video cable and composite stereo cables (red and white RCA plugs) from the DVR to the inputs on your DVD Recorder. If your TV has Component inputs, connect the Component Out from the DVD Recorder to the Component In on the TV, otherwise you can use S-Video or Composite. You will still need to use RCA audio with your video connection.
Change the input on your DVD Recorder to match the inputs you are using. Since I’m using the rear S-Video input, I change my input to “L1″, which is the input for recording using the rear S-Video input. If I was recording using the front analog cables it would be “L2″, the front Firewire input, “DV”. The input select can typically be changed using the DVD Recorder remote.
You’ll also need to change the input select on the TV to match the inputs you are using to connect the DVD Recorder. In my case, I’m using rear inputs that correspond to “Video 2″. This allows me to view what I’m recording.
You can now perform a test to make sure the video signal is coming through to the DVD Recorder and the TV. Simply start playing the recorded TV show back from the Digital Video Recorder and see if the video and audio is being played back on the TV. If you have everything connected properly, and the correct input select, you should be seeing and hearing your video. If not, check your cable connections, power, and input select.
Now you’re ready to record! First, determine the type of disc you’ll need, either DVD+R/RW or DVD-R/RW. For more info on Recordable DVDs read the article Types of Recordable DVD Formats. Second, change the record speed to the desired setting. For me it’s “SP”, which allows up to two hours of record time.
Place the recordable DVD into the DVD Recorder.
Start playing the Recorded TV Show back while pressing record on either the DVD Recorder itself, or by using the remote. If you want to record more than one show on a DVD, just pause the recorder while you switch to the other show, and then resume by hitting pause on the recorder or remote a second time after you start playing the next tape. However, make sure you have enough space on the disc for the shows you are recording.

10. Once you have recorded your TV show (or shows) hit stop on the recorder or the remote. DVD Recorders require that you “finalize” the DVD in order to make it a DVD-Video, capable of playback in other devices. The method for finalizing varies by DVD Recorder, so consult the owner’s manual for information on this step.

11. Once your DVD is finalized, it is now ready for playback.

12. While you can purchase a DVR that includes a built-in DVD Recorder, those can be expensive. By hooking up a seperate DVD Recorder, you can save some money, while taking advantage of backing up you TV shows to DVD, without the need for a DVR with a built-in DVD Recorder.

13. On the other hand, having the convenience of a built-in DVD Recorder is the right choice for those who don’t want to hook up an extra A/V device to their home theater set-up.

Tips:

Make sure you use the DVD format that works with your DVD Recorder.
When using analog cables to record from a Digital Video Recorder to a DVD Recorder make sure you use highest quality cables that the DVD Recorder accepts, and that the DVR outputs.
When selecting a recording speed on the DVD Recorder use 1 hour or 2 hour mode. The 4 and 6 hour modes should only be used when recording TV shows you don’t plan to keep, or long sporting events.
Make sure you set the correct input select for the inputs you are using on the DVD Recorder. Typically, DV for a Firewire connection and L1 and L2 for analog inputs.
Make sure to Finalize your DVD for playback in other DVD devices.

What You Need:

DVD Recorder
Digital Video Recorder – such as TiVo
Audio/Video Cables
DVD Recordable Media of the correct format
TV hooked up to the DVD Recorder to monitor the recording

Video Killed The Radio Star (The Buggles)

2
Hindi Song: Tumne Jo Kaha (Laawaris)
Music Director: Rajesh Roshan
Copied From: Barbie Girl (Aqua)
Barbie Girl (Aqua)

Tumne Jo Kaha (Laawaris)

PLEASE LEAVE COMMENTS

THIS SONG FROM NEPALI MOVIE:
SAPUT Nepali Movie

Beginning Music Copy from top hindi bollywood Movie Song

PLEASE LEAVE COMMENTS

Resumen del temario:

• Presentación
• Entorno de trabajo de la base de datos
• Seleccionar la información. Filtros
• Edición de una base de datos en la presentación de lista
• Edición en la presentación en formulario y en el diseño de formulario
• Impresión de una base de datos. Informes
• Creación de una base de datos
• Diseño de una base de datos

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1.Introduccion a sql

2-Tipos de datos

3. INTRODUCCIÓN A SQL PLUS

3.1 COMANDOS SQL PLUS DE EDICIÓN
3.2 FICHEROS DE COMANDOS
3.3 CONSULTA DE DATOS
3.4. OPERADORES ARITMÉTICOS
3.5.Operaciones de comparación y lógicas
3.6 OPERADORES DE COMPARACION DE CADENAS DE CARACTERES
3.7.Comprobación con conjunto de valores
3.8.SUBCONSULTAS
3.8.1 Consultas que genera valores simples/lista
3.9 Combinación de Tablas

4. FUNCIONES

4.1 Introducción
4.2 Funciones Aritméticas
4.2.1 Funciones de Grupo de valores
4.2.2. Funciones de valores simples
4.2.3. Funciones de Lista
4.3 FUNCIONES DE CADENAS DE CARACTERES
4.3.1 Funciones que devuelves valores carácter
4.4 Funciones para el manejo de fecha
4.5. FUNCIONES DE CONVERSION
4.6. OTRAS FUNCIONES

5.CLAUSULAS AVANZADAS DE SELECCIÓN

5.1. Introducción
5.2. Agrupación de elementos. GRUOP BY y HAVING
5.3.Combinación externa ( outer joins
5.4. Unión, intersección y minus
5.4.1. Reglas para los operadores de conjunto

6. MANIPULACION DE DATOS: INSERT, UPDATE Y DELETE

6.1 Inserción de datos. Orden INSERT
6.1.1.inserción con select
6.3.Modificacion UPDATE
6.3.1.UPDATE con SELECT
6.4.Borrado de filas: DELETE
6.5.ROLLBACK, COMMIT, AUTOCOMMIT

7. CREACIÓN, SUPRESIÓN Y MODIFICACIÓN DE TABLAS Y DE VISTAS EN LA EMPRESA

7.1. INTRODUCCION
7.2. CREACIÓN DE UNA TABLA
7.2.1.integridad de datos
7.3.Supresión de tablas
7.3.1.Orden truncate
7.4.Modificación de tablas
7.4.Adicción de restricciones
7.5. CREACIÓN Y USO DE VISTAS
7.5.1. Borrado de vistas
7.5.2. Operaciones sobre vistas
7.6 CREACIÓN DE SINÓNIMOS
7.6.1 Borrado de sinónimos
7.7 CAMBIO DE NOMBRE

8.Generación de informes en SQL plus

8.1.Introducción
8.3.Ordenes para generar informes
8.3.1.Orden REMARK (REM)
8.3.2.Configuración de variables del entorno SQL plus con orden SET
8.3.4.ORDEN COLUMN. Formato columnas
8.3.5.Orden BREAK ON. Ruptura de control
8.3.6. Orden COMPUTE. Cálculos
8.3.7. Orden SPOOL. Generador de informes

9.Administración de Oracle

9.2. Herramienta de Oracle
9.3.estructura de la base de datos
9.4.Arquitectura de Oracle
9.4.1.Componentes de la base de datos
9.4.2.Estructura de la memoria
9.4.3.Procesos de soporte de la base de datos
9.4.4.¿Qué es una instancia oracle?
9.5.Gestión de seguridad
9.5.1.Usuarios
9.5.2 PRIVILEGIOS
9.5.3.Roles
9.6.Gestión de Tablespaces
9.7.Secuencias

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