Friday, February 18, 2011
Thursday, February 17, 2011
Wireless Metrics
dBm is defined as power ratio in decibel (dB) referenced to one milliwatt (mW). It is an abbreviation for dB with respect to 1 mW and the "m" in dBm stands for milliwatt.
dBm is different from dB. dBm represents absolute power, whereas dB is a ratio of two values and is used to represent gain or attenuation. For example, 3 dBm means 2 mW, and 3 dB means a gain of 2. Similarly, -3 dBm means 0.5 mW, whereas -3 dB means attenuation of 2.
The formula to calculate dBm from mW is:
dBm = 10 log10( P )
1mW
Table of dBm and mW
http://www.guatewireless.org/internetworking/redes/wireless/tabla-de-relacion-entre-dbm-y-potencia-de-transmision-wlan/
dBm is different from dB. dBm represents absolute power, whereas dB is a ratio of two values and is used to represent gain or attenuation. For example, 3 dBm means 2 mW, and 3 dB means a gain of 2. Similarly, -3 dBm means 0.5 mW, whereas -3 dB means attenuation of 2.
The formula to calculate dBm from mW is:
dBm = 10 log10( P )
1mW
Table of dBm and mW
http://www.guatewireless.org/internetworking/redes/wireless/tabla-de-relacion-entre-dbm-y-potencia-de-transmision-wlan/
Wednesday, February 16, 2011
Salesforce Apexpages jQuery
References:
[1]
http://code.google.com/apis/libraries/devguide.html
[2] jQuery UI for Salesforce
http://www.titaniainc.com/ui-enhancements/jquery-enhanced-components-release/
[3] Dependent Multilevel Selectlists
http://blog.jeffdouglas.com/2008/11/25/dependent-multilevel-selectlists/
[4] Salesforce Form Validation Enhanced
http://th3silverlining.com/2010/03/02/visualforce-form-validation-enhanced/
[5] Make select list with ApexClass
http://www.salesforce.com/us/developer/docs/pages/Content/pages_compref_selectList.htm
[1]
http://code.google.com/apis/libraries/devguide.html
[2] jQuery UI for Salesforce
http://www.titaniainc.com/ui-enhancements/jquery-enhanced-components-release/
[3] Dependent Multilevel Selectlists
http://blog.jeffdouglas.com/2008/11/25/dependent-multilevel-selectlists/
[4] Salesforce Form Validation Enhanced
http://th3silverlining.com/2010/03/02/visualforce-form-validation-enhanced/
[5] Make select list with ApexClass
http://www.salesforce.com/us/developer/docs/pages/Content/pages_compref_selectList.htm
Salesforce Apexpages Styles
Debugging Visualforce Pages with custom Styles for UI compatibility
http://www.forcetree.com/2010_06_01_archive.html
http://www.forcetree.com/2010_06_01_archive.html
Tuesday, February 15, 2011
Monday, February 14, 2011
jQuery multiselect widget
Wednesday, February 09, 2011
Salesforce Work with Opportunities
Editing Multiple Records Using a Visualforce List Controller
http://developer.force.com/cookbook/recipe/editing-multiple-records-using-a-visualforce-list-controller
http://developer.force.com/cookbook/recipe/editing-multiple-records-using-a-visualforce-list-controller
WPA-PSK tips
Manual seguridad alta con configuración WPA-PSK
http://www.seguridadwireless.net/hwagm/wpa.html
http://www.seguridadwireless.net/hwagm/wpa.html
Friday, February 04, 2011
Postgres Auditory
Trace connections
select * from pg_stat_activity;
select client_addr,count(*) from pg_stat_activity group by client_addr;
select datname,client_addr,count(*) from pg_stat_activity group by datname,client_addr;
Test times of count(*)
EXPLAIN ANALYZE SELECT COUNT(*) FROM remitos;
Obtain rows(tuples) info
select * from pg_class where relname = 'remitos' and relkind = 'r';
select * from pg_stat_all_tables where relname = 'remitos';
and look at the n_tup_ins, n_tup_del, ...
references:
http://www.postgresonline.com/journal/archives/134-Terminating-Annoying-Back-Ends.html
select * from pg_stat_activity;
select client_addr,count(*) from pg_stat_activity group by client_addr;
select datname,client_addr,count(*) from pg_stat_activity group by datname,client_addr;
Test times of count(*)
EXPLAIN ANALYZE SELECT COUNT(*) FROM remitos;
Obtain rows(tuples) info
select * from pg_class where relname = 'remitos' and relkind = 'r';
select * from pg_stat_all_tables where relname = 'remitos';
and look at the n_tup_ins, n_tup_del, ...
references:
http://www.postgresonline.com/journal/archives/134-Terminating-Annoying-Back-Ends.html
Thursday, February 03, 2011
Salesforce Test Visual Apex Pages
1) Page.existingPageName
2) PageReference pageRef = new PageReference('partialURL');
PageReference pageRef = new PageReference('/apex/HelloWorld');
3) PageReference pageRef = new PageReference('fullURL');
PageReference pageRef = new PageReference('http://www.google.com');
4) PageReference pageRef = ApexPages.currentPage();
Executing page:
https://c.na7.visual.force.com/apex/SecondAccount
References
Displaying JIRA related information in Salesforce.com
http://www.customware.net/repository/pages/viewpage.action?pageId=62455956
2) PageReference pageRef = new PageReference('partialURL');
PageReference pageRef = new PageReference('/apex/HelloWorld');
3) PageReference pageRef = new PageReference('fullURL');
PageReference pageRef = new PageReference('http://www.google.com');
4) PageReference pageRef = ApexPages.currentPage();
Executing page:
https://c.na7.visual.force.com/apex/SecondAccount
References
Displaying JIRA related information in Salesforce.com
http://www.customware.net/repository/pages/viewpage.action?pageId=62455956
Wednesday, February 02, 2011
Wireless Punto a Punto :: Requisitos x distancia
Enlace punto a punto(requisitos x distancias):
Enlace 3Km entre 02 locales:
02 Antenas Hyperlink de 15 dBi (U$ 73 c/u)
02 AP(AccessPoint) TRENDnet de 54 Mbps (U$ 107 c/u)
02 pigtail de 60 cm (U$ 25 c/u)
Puede lograr enlaces de hasta 7Km usando AP(TRENDnet , DLINK , LINKsys , Edimax)
Enlace 8Km:
02 Antenas Hyperlink de 24 dBi (U$ 107 c/u)
02 AccessPoint(AP) Trendnet de 54 Mbps (U$ 110 c/u)
02 pigtail de 2 metros (U$ 34 c/u)
Enlace 1Km:
02 Antena Hyperlink Flat Panel de 14 dBi (U$ 45 c/u)
02 AP TP-LINK 54 Mbps (U$ 79 c/u)
02 Pigtail de 60 cm. (U$ 22 c/u)
Referencias
http://www.ds3comunicaciones.com/
http://www.opcionweb.com/index.php/2008/03/04/tipos-de-antenas-wifi/
Enlace 3Km entre 02 locales:
02 Antenas Hyperlink de 15 dBi (U$ 73 c/u)
02 AP(AccessPoint) TRENDnet de 54 Mbps (U$ 107 c/u)
02 pigtail de 60 cm (U$ 25 c/u)
Puede lograr enlaces de hasta 7Km usando AP(TRENDnet , DLINK , LINKsys , Edimax)
Enlace 8Km:
02 Antenas Hyperlink de 24 dBi (U$ 107 c/u)
02 AccessPoint(AP) Trendnet de 54 Mbps (U$ 110 c/u)
02 pigtail de 2 metros (U$ 34 c/u)
Enlace 1Km:
02 Antena Hyperlink Flat Panel de 14 dBi (U$ 45 c/u)
02 AP TP-LINK 54 Mbps (U$ 79 c/u)
02 Pigtail de 60 cm. (U$ 22 c/u)
Referencias
http://www.ds3comunicaciones.com/
http://www.opcionweb.com/index.php/2008/03/04/tipos-de-antenas-wifi/
Tuesday, February 01, 2011
Adobe Acrobat Reader Resources
Adobe Acrobat 8 Pro Español Completo
http://alvareitor.programasfull.com/adobe-acrobat-pro-8-espanol-descargar.html
Adobe Acrobat 8 Professional Multi 5 Español
http://www.gratisprogramas.org/descargar/adobe-acrobat-8-professional-multi-5-espanol-mu-full-iso/
Adobe Acrobat Pro X v10.0 MultiLenguaje No Español
http://www.taringa.net/posts/downloads/7987279/Adobe-Acrobat-Pro-X-v10_0-MultiLenguaje-No-Espanol.html
http://alvareitor.programasfull.com/adobe-acrobat-pro-8-espanol-descargar.html
Adobe Acrobat 8 Professional Multi 5 Español
http://www.gratisprogramas.org/descargar/adobe-acrobat-8-professional-multi-5-espanol-mu-full-iso/
Adobe Acrobat Pro X v10.0 MultiLenguaje No Español
http://www.taringa.net/posts/downloads/7987279/Adobe-Acrobat-Pro-X-v10_0-MultiLenguaje-No-Espanol.html
Friday, January 28, 2011
Thursday, January 27, 2011
Url Test Security
Sucuri Security Scanner
http://sitecheck.sucuri.net/scanner/
http://www.avgthreatlabs.com/sitereports
http://onlinelinkscan.com/
http://www.mywot.com/es (reputacion)
http://www.stopbadware.org/home/reportsearch (Indica quien te puso en la lista negra)
http://wepawet.cs.ucsb.edu
http://sitecheck.sucuri.net/scanner/
http://www.avgthreatlabs.com/sitereports
http://onlinelinkscan.com/
http://www.mywot.com/es (reputacion)
http://www.stopbadware.org/home/reportsearch (Indica quien te puso en la lista negra)
http://wepawet.cs.ucsb.edu
Labels:
Security,
Web Tools,
Web.Developer
Monday, January 24, 2011
Thursday, January 20, 2011
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