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Augmented Reality: Connect and Engage Using New Touchstone Technology from Lynne d Johnson Presetned at PRSA Digital Impact Conference June 28, 2013 #PRSADIConf - Augmented Reality lets you overlay digital images and information on smartphone screens or computer monitors....

For years, I've been saying that I'm going to relaunch this blog and relaunch my website and frankly given life and work, it just hasn't happened. But my life is in major flux right now, and I'm trying out a...

Back in 2010, when I was SVP of Social Media at the Advertising Research Foundation, a member in the mobile industry was interested in learning whether the opportunities in digital signage were right for the company to explore. I ended...

I just had a conversation with someone who has formed a Delaware LLC and is ready to invest in growing his business. Specifically, this individual was looking for a paid…

About 1,199 ARBs from different parts of the region trooped to designated payout areas to get their cash assistance under the DSWD’s Assistance to Individuals in Crisis Situation (AICS) program.

CARD SME Bank, a thrift bank under the CARD Mutually Reinforcing Institution (CARD MRI), opens its 40th branch on June 10, 2024, in Ipil, Zamboanga Sibugay.

A focus group discussion with the ARBs was conducted by Environmental and Social Safeguard (ESS) specialists from Visayas and Mindanao as part of the pilot testing of the Resettlement Policy Framework (RPF).

The recent research study conducted by the National Maritime Polytechnic has revealed significant data on the prevalence of mental disorders and suicides among Filipino seafarers.

Every year in late October and early November, he explains, Earth passes through a river of space dust associated with Comet Encke. Tiny grains hit our atmosphere at 65,000 mph. At that speed, even a tiny smidgen of dust makes a vivid streak of light--a meteor--when it disintegrates. Because these meteors shoot out of the constellation Taurus, they're called Taurids.

Above: a Taurid fireball photographed Oct. 28, 2005, by Hiroyuki Iida of Toyama, Japan.

Holy Shit, I saw Diana Ser today!! Well, it all began I had a dream this morning. I dream that I will saw a beautiful sweet woman today! And then thunderstorm... Lighting... Duh!! I woke up and thought I having nightmares...

I was working today and is was Saturday! Weekend, humm.. As usual when to work and my office is just sit on the Singapore Post main branch building!! When to pay my Singapore Post bills, so did I drop a mail as I passby the letterbox.

I took my number and when to the counter and pay my postal bills. As I was waiting, my head turn left and I did not notice I saw a short, sweet, curly hair, beautiful lady over the next counter!! Until, she was ask about her name to take her parcel as they as send to her. She spoken & said "Diana". My head was think is it that Diana Ser from Channel NewsAsia. I hardly seen as celebraties in the public.
I expect her to be taller in the TV news. So I ask the Singapore Post counter guy. Is that Diana Ser? He simply reply, humm.. let me see! Yeah! Is her. When I look at her she when over another counter to take her parcel. She hurried away and took a big box and a few letter on top of it. Damm, she cute!! =p haha She was wearingher brown leather handbag, demin jeans & white spaghetti strips with her brown bra strips sticking out!! She look great on her curly wavy hair although!

I though is was the end of seen her hurried back to her car I guess. BUT WAIT!!!!!

I when to the NTUC fairprice supermarket was thinking of picking up some yogurt for lunch. Then Diana Ser appear in front of me as she was chosing some butter. I when pass her and think what yogurt I want to eat. Again my mind was thinking holy shit I saw her 2 times of this celebraties in person. Most of the time & most of the Singaporean will saw her on the news TV as a anchorwomen of the Channel NewsAsia Repoter lor!! >_< She is exectlly as Cindy (my ex-gf size). Boy she still hot! I was really expect her to be taller woman and i guess due to all the makeup on the TV and off makeup and in real person is a whole different story lol.....

A stereophile friend of mine with $25,000 worth of sound-reproduction equipment in his house just went spontaneously gaga over the Sonic Impact T-Amp, a $30 15-Watt amplifier that "easily outperforms amplifiers that cost 100 times more." Apparently, audiophile reviewers (like this guy) (Google cache of previous link) took what was meant as a gimmick cheap battery-powered amp and have turned it into an overnight sensation, shipping thousands of units to a modder audience that are hacking their own aluminium enclosures and the like.
This amplifier is STUNNING. And the review could stop here. Considering shipping, customs fees, VAT etc you can pay 25-30 € max for this item (non-EU Countries, make your conversions). This means the T-Amp costs more or less than a Music CD. At this price, it should deliver a multimedia-like kind of sound and shouldn't even be considered on a HiFi mag like this one. I understand you can find it hard to believe but I can assure you I found it harder, being the skeptic and investigative guy I am.
Warning: this has been the most thrilling and incredible experience I've had with a component in, say, 25 years of HiFi listening. This website has existed since 1995, I've reviewed hundreds of HiFi components, inexpensive and ridiculously overpriced ones. I never - repeat - NEVER came across such a stunning piece of gear in all of these years.

Published at LXer: Arch Linux has announced a new partnership with Valve, the company behind the Steam gaming platform and Steam Deck. Read More......

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Published at LXer: FFmpeg 7.1 "Peter" debuts with full Vulkan encoding pipelines, enhanced AAC decoding, MV-HEVC support, and more. Here's what's new! Read More......

Published at LXer: Arch Linux is a robust operating system often chosen by power users and IT professionals. While there is no doubt that it is an extremely powerful OS, the need to use other...

Hello, I'm not sure what happened but I've always been able to tunnel to my xrdp GUI using a ssh putty session. Now when I try to connect after connecting via SSH it just shows a blank screen with an...

New York. Eine Stadt an der Ostküste der Vereinigten Staaten von Amerika in der Mietpreise von 3.000 Dollar pro Monat keine Seltenheit sind. Eine Stadt, in der Armut von der Insel Manhattan, dem Herzen New Yorks, verdrängt wird und eine Stadt deren Multikultur sich nicht nur in den fast schon legendären Stadtteilen wie Little Italy und Chinatown zeigt.

Russische Kriegsschiffe haben am 20. November Cruise Missiles auf Ziele in Syrien abgefeuert und dabei sieben islamistische Stellungen in den nördlich Provincen Raqqa, Idlib and Aleppo getroffen. Col Patrick Ryder kritisierte, bei den russischen Angriffen würden auch gemäßigte syrische Oppositionsgruppe in Mitleidenschaft gezogen. Die Nachrichtensender BBC und Channel 4 veröffentlichten ...

Der US-amerikanische Präsidentschaftskandidat Ben Carson vertritt eine abenteuerliche Theorie über die ägyptischen Pyramiden: nach seiner Überzeugung dienten diese als Getreidespeicher. Diese Theorie verkündete er bereits im Jahre 1998 und wiederholte sie vor kurzem gegenüber dem Nachrichtensender CBS. Bis 2013 war er der heute 64jährige Carson als Facharzt für Neurochirurgie tätig ...

This is not only a H.323 topic, but since H.323 also uses TCP connections, it applies to H.323 as well:

To detect network errors and signaling connection problems, you can enable TCP keep alive feature. It will increase signaling bandwidth used, but as bandwidth utilized by signaling channels is low from its nature, the increase should not be significant. Moreover, you can control it using keep alive timeout.

The problem is that most system use keep alive timeout of 7200 seconds, which means the system is notified about a dead connection after 2 hours. You probably want this time to be shorter, like one minute or so. On each operating system, the adjustment is done in a different way.

After settings all parameters, it's recommended to check whether the feature works correctly - just make a test call and unplug a network cable at either side of the call. Then see if the call terminates after the configured timeout.

Linux systems

Use sysctl -A to get a list of available kernel variables
and grep this list for net.ipv4 settings (sysctl -A | grep net.ipv4).
There should exist the following variables:

net.ipv4.tcp_keepalive_time:   time of connection inactivity after which
                               the first keep alive request is sent
net.ipv4.tcp_keepalive_probes: number of keep alive requests retransmitted
                               before the connection is considered broken
net.ipv4.tcp_keepalive_intvl:  time interval between keep alive probes

You can manipulate with these settings using the following command:

sysctl -w net.ipv4.tcp_keepalive_time=60 net.ipv4.tcp_keepalive_probes=3 

    net.ipv4.tcp_keepalive_intvl=10

This sample command changes TCP keepalive timeout to 60 seconds with 3 probes,
10 seconds gap between each. With this, your application will detect dead TCP
connections after 90 seconds (60 + 10 + 10 + 10).

FreeBSD and MacOS X

For the list of available TCP settings (FreeBSD 4.8 an up and 5.4):

sysctl -A | grep net.inet.tcp

net.inet.tcp.keepidle - Amount of time, in milliseconds, that the (TCP) 
connection must be idle before keepalive probes (if enabled) are sent.

net.inet.tcp.keepintvl - The interval, in milliseconds, between 
keepalive probes sent to remote machines. After TCPTV_KEEPCNT (default 
8) probes are sent, with no response, the (TCP)connection is dropped.

net.inet.tcp.always_keepalive - Assume that SO_KEEPALIVE is set on all 
TCP connections, the kernel will periodically send a packet to the 
remote host to verify the connection is still up.

therefore formula to calculate maximum TCP inactive connection time is 
following:

net.inet.tcp.keepidle + (net.inet.tcp.keepintvl x 8)

the result is in milliseconds.

therefore, by setting
net.inet.tcp.keepidle = 10000
net.inet.tcp.keepintvl = 5000
net.inet.tcp.always_keepalive =1 (must be 1 always)

the system will disconnect a call when TCP connection is dead for:
10000 + (5000 x 8) = 50000 msec (50 sec)

To make system remember these settings at startup, you should add them 
to /etc/sysctl.conf file

Solaris

For the list of available TCP settings:

ndd /dev/tcp ?

Keepalive related variables:
- tcp_keepalive_interval - idle timeout

Example:
ndd -set /dev/tcp tcp_keepalive_interval 60000

Windows 2000 and Windows NT

Search Knowledge Base for article ID 120642:
http://support.microsoft.com/kb/120642/EN-US

Basically, you need to tweak some registry entries under
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpipParameters

Most H.323 vendors did not implement encrypting the signaling connection with TLS. They only encrypt the media (RTP). But you can use the two GNU Gatekeepers to encrypt you call signaling even when your endpoints don't support this natively.

Suppose you have 2 locations and want to connect them securely over the public internet.

GnuGk can encrypt call signalling between those locations using TLS and encrypt the media (RTP) using H.235.6 (AES encryption). 

 Configuration for GNU Gatekeeper 1 (prefix 01)

[Gatekeeper::Main]

[RoutedMode]
GKRouted=1
H245Routed=1
CallSignalPort=1720
AcceptUnregisteredCalls=1
; make sure H.245 gets tunneled for TLS
H245TunnelingTranslation=1
; add AES media encryption if the endpoint doesn't encrypt itself
EnableH235HalfCallMedia=1
; only allow encrypted calls
RequireH235HalfCallMedia=1
; change the media key after 2^31 operations
EnableH235HalfCallMediaKeyUpdates=1

[Proxy]
Enable=1

[ModeSelection]
0.0.0.0/0=PROXY
; only use routed mode for local calls
192.168.0.0/18=H245ROUTED

[TLS]
EnableTLS=1
PrivateKey=/path/to/server.pem
Certificates=/path/to/server.pem
CAFile=/path/to/rootcert.pem
Passphrase=MySecret
CheckCertificateIP=1

[Gatekeeper::Auth]
FileIPAuth=required;Setup

[FileIPAuth]
; allow all calls from local network
192.168.1.0/24=allow
; only allow TLS encrypted and authenticated calls from elsewhere
any=onlyTLS

[RasSrv::PermanentEndpoints]
; the GnuGk in the other location, serving prefix 02
1.2.3.4:1300=remote-gw;02

[EP::remote-gw]
; use TLS to call remote GnuGk
UseTLS=1 

Configuration for GNU Gatekeeper 2 (prefix 02)

[Gatekeeper::Main]

[RoutedMode]
GKRouted=1
H245Routed=1
CallSignalPort=1720
AcceptUnregisteredCalls=1
; make sure H.245 gets tunneled for TLS
H245TunnelingTranslation=1
; add AES media encryption if the endpoint doesn't encrypt itself
EnableH235HalfCallMedia=1
; only allow encrypted calls
RequireH235HalfCallMedia=1
; change the media key after 2^31 operations
EnableH235HalfCallMediaKeyUpdates=1

[Proxy]
Enable=1

[ModeSelection]
0.0.0.0/0=PROXY
; only use routed mode for local calls
192.168.0.0/18=H245ROUTED

[TLS]
EnableTLS=1
PrivateKey=/path/to/server.pem
Certificates=/path/to/server.pem
CAFile=/path/to/rootcert.pem
Passphrase=MySecret
CheckCertificateIP=1

[Gatekeeper::Auth]
FileIPAuth=required;Setup

[FileIPAuth]
; allow all calls from local network
192.168.1.0/24=allow
; only allow TLS encrypted and authenticated calls from elsewhere
any=onlyTLS

[RasSrv::PermanentEndpoints]
; the GnuGk in the other location, serving prefix 01
1.2.3.5:1300=remote-gw;01

[EP::remote-gw]
; use TLS to call remote GnuGk
UseTLS=1 

Other options

You could also configure the remote GNU Gatekeeper as a neighbor, but beware that the RAS traffic between neighbors will show meta data (whois is caling who) in clear text! 

See the GnuGk manual section on TLS for more details and examples how to generate the OpenSSL certificates. 

I am fascinated with the success of the Amazon Echo. A company founded on selling books has worked very hard to become a hardware powerhouse and I think they achieved that goal with the Amazon Echo. I bought an Echo to play with home automation but when Amazon posted instructions on how to build your […]

bookoasis:

The World In A Bookshop by infra-leve.

My living room is starting to look like this actually…

In South Kensington they take their fashion so seriously, that if you find yourself on the District/Circle line platform wearing something untrendy, TfL have got you covered. 

Gap are a bit mainstream though. Surely a jumper from somewhere more boutique would have been more fitting?

Utilizar XHTML puede ayudar a mejorar el posicionamiento Web. Por una parte, se consigue que el código de las páginas Web sea más limpio y claro a los ojos de los robots de búsquedas. Facilitar la labor a este robot siempre es un punto a favor del posicionamiento...

¿Para que navegador diseño mi sitio? Parece difícil la pregunta, pero no, la respuesta es simple, PARA TODOS. Bueno, si usted se refiere a por que navegador se puede guiar par diseñar su sitio para que los robots de búsqueda lo vean bien, pues pruebe un Lynx... :-) si, en serio, creo que esa es una vista más cercana de cómo ven los robots de búsqueda los sitios, pero bueno, hablando realmente en serio, la realidad es que....

Con CSS se logra aumentar la densidad de las palabras clave dentro de los contenidos, ya que muchas de las etiquetas ocuparán muchísimo menos espacio. Esto también supone un menor peso para las páginas Web, lo cual agradecen tanto los robots de búsqueda como los usuarios finales. Adicionalmente se podrá cambiar rápidamente los estilos de ciertas palabras, modificando la importancia que les quieres otorgar ante los robots de búsqueda...

El trabajo SEO en los primeros años de su desarrollo se caracterizó por el uso de diversas técnicas dirigidas a "engañar" a los robots de búsqueda. Esas técnicas fueron dejando de funcionar a partir del desarrollo de los robots de búsquedas que cada día son mas sofisticados y son capaces de detectar desde textos invisibles para el usuario hasta la existencia de textos no legibles por personas ...

Muchas empresas se dedican a ofrecer posicionamiento, pero gran parte se caracteriza por la falta de sinceridad hacia el cliente, al prometer cosas que no están en sus manos por el afán de ganar clientes. Pecan también algunas de estas en abuso de herramientas automáticas que no son capaces de sustituir la inteligencia humana, y de la falta de actualización en el tema o abuso de métodos que llevan a los robots de búsqueda a penalizar el sitio...

Un abuso de frecuencia en la palabra a menudo es interpretado como spam y es penalizado. Debemos mantener siempre el contenido de las Webs legible para las personas, pues además del tema de las penalizaciones de contenidos hechos solo para buscadores debemos tener en cuenta que el objetivo final de nuestras Webs e llegar a los usuarios y ofrecerles contenidos de calidad que ...

La accesibilidad ayuda al buen posicionamiento Web. Persigue, entre otros, el objetivo de que ningún usuario este discriminado ante el acceso y asimilación de los contenidos, ya sea por problemas físicos (visión ejemplo), a causa de usar navegadores con pocas capacidades, poseer conexiones muy lentas, personas sin ratón, con pantallas pequeñas o de baja resolución, pantallas en blanco y negro, etc. ... ¿Como lograr esto? ...