Posted under Uncategorized od on czwartek 11 grudzień 2008 at 8:20 po południu
This article may require cleanup to meet Wikipedia's quality standards.
Please improve this article if you can. (October 2008)
Unison
Developed by
Unison Technologies, Inc.
Latest release
1.0
OS
Linux (server);
Windows or Linux (client)
Type
Unified communications
License
Commercial
Website
http://www.unison.com
Unison is unified communications software for business, developed by Unison Technologies, Inc., of New York City. It is positioned as a competitor to the unified communications solution of Microsoft, which consists of Exchange Server 2007 and Office Communications Server 2007 integrated with a PBX organizm. The software also competes with standalone poczta elektroniczna and groupware servers such as Exchange 2003, and standalone PBX systems from companies such as Cisco, Nortel and Avaya.
Unison consists of two main elements: Unison Server, which is Linux-based server software; and Unison Desktop, which is client software that runs natively on either the Ubuntu Linux or the Microsoft Windows operating systems. When used with Unison Server, Unison Desktop provides users with a single desktop application for poczta elektroniczna, instant messaging, telephony and voicemail, scheduling and contact management.
Unison was released in beta on March 4, 2008 and a commercial version went on sale on July 29, 2008. The maker of the software is headquartered in New York, with additional offices in Boston and Russia.
On August 5, 2008, Unison Technologies announced an Ubuntu partnership with Canonical, commercial donator of Ubuntu, to distribute the Unison software via the Canonical Web store.
Contents
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Unison Server (server software)
The Unison Server software is available for a number of Linux distributions, including Red Hat Enterprise Linux, CentOS and Ubuntu Server Edition. It performs the following functions:
IP-PBX układ, including automated call distribution and hunt groups, interactive voice response, voicemail storage and voicemail to email, call recording, call parkowanie, call forwarding, SIP compatibility, real-time monitoring,
E-mail server, with anti-virus and anti-spam
Instant messaging server
LDAP directory server
Calendar and scheduling server
Backup and restore
Unison Desktop (client software)
The Unison Desktop client is available for Windows and Linux. It provides users with the following features:
E-mail, including send, receive and other common poczta elektroniczna client features
Instant messaging, including send, receive, archive and search features, dodać gateways to popular instant messaging systems including ICQ, MSN Messenger, Jabber and Google Talk,
Telephony, including features to place, receive, forward and record calls
Voicemail, which appears inside a katalog in the client
Scheduling, including group calendaring functionality and 'free/busy' status
Contact management
Administration and migration
The Unison Server is managed via Unison Control Dyskusja panelowa, a browser-based console where IT staff can perform administration of users, permissions and the Unison software's functionality.
In addition to the Unison server and client software, call control and migration tools are provided for businesses deploying the system:
Unison Call Manager is an application for managers, which provides control over telephone hunt groups inside a company
Unison provides a Microsoft Exchange migration tool, enabling przewożenie of user accounts, mejl and contacts to the Unison układ from Microsoft's poczta elektroniczna platform
Standards and protocols
The Unison server and desktop client synchronize regularly with each other as users perform communication tasks. Unison is based on or supports a range of standards, including:
SIP and RTP for telephony
IMAP and SMTP for e-mail
XMPP, OSCAR and MSN Messenger for instant messaging and other communication
LDAP for address book and directory services
CalDAV and iMIP for scheduling, including sending and receiving Microsoft Outlook-compatible calendar invitations
Open source components
The Unison software uses a variety of open source software as part of its unified communications układ. A complete list, including source code for download, is available at the company’s open source page. Below are some of the open source projects upon which Unison is based:
FreeRADIUS
MySQL
Apache (Tomcat)
Postfix
SER
OpenLDAP
Mozilla Thunderbird
eJabberd
Berkeley DB
External links
Unison Home page
Unison Demo version
Retrieved from ""
Category: SoftwareHidden categories: Cleanup from October 2008 | All pages needing cleanup
Posted under Uncategorized od on czwartek 11 grudzień 2008 at 7:09 po południu
Deep Freeze is an application suite for Microsoft Windows, Mac OS X, and Linux by Faronics Corporation. Deep Freeze gives administrators the ability to protect the core operating układ files and configuration files of an environment without eliminating the usability for (most) end users.
Contents
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Use
Deep Freeze protects the computer by utilizing a separate partition on the hard disk drive for write back. When the computer is rebooted, this partition is treated empty again and existing information on it is unaccessible. This allows users to make 'virtual' changes to the organizm, giving them the appearance that they can modify core files or even delete them, and even make the ustrój unusable to themselves, obuwie upon reboot the 'frozen' state of the operating organizm is restored.
To make changes, a ustrój dysponent must 'unfreeze' the ustrój partition, make any needed changes, and 'freeze' it again. These changes, in this way, are saved to the protected partition instead of the 'unfrozen' write back partition.
While Deep Freeze will allow users to have the comfort of virtually modifying the układ as they like, it does not control the programming of individual applications that are installed. If, for example, a user account under Windows is a 'limited' account, regardless if the users can actually effect some files or not, some application installers will assume the user can not and inform them they must be an zarządca. In some applications, this can be bypassed by working in 'Windows 98 Compatibility mode', which has no such user restrictions that programs typically mind, obuwie many application installers still find trouble with this.
Deep Freeze only protects the operating ustrój in a 'fresh booted' state. The protections the software offers can often be bypassed, for example, by installing a malicious, organizm wide application, especially if other users find this application popular and accept that it being installed when they log in means it is authentic. One user could install a modified version of a popular web browser that's been designed to save passwords to a server on the net, then log out, then other users who log in would see that browser and may use it out of preference. To use the computer more safely, the user would have to restart the computer first.
Deep Freeze also can not protect against direct access to a disk drive when the hosting operating ustrój is not in control of the organizm. That is, if another operating układ can be boot from another hard disk, a USB device, or optical massmedia, they will have real access to the contents of the frozen and unfrozen partitions. This may be protected against by setting the first hard disk as the only bootable hard disk and password protecting the BIOS configuration, obuwie if physical access to the computer is available, this can be bypassed with a BIOS reset or rearranging the hard drive installation.
Notes
^
Aaron Ricadela (June 28, 2005) InformationWeek
Jonathan Blum (January 14, 2008) Fortune Small Business
Posted under Uncategorized od on czwartek 11 grudzień 2008 at 3:59 po południu
The introduction to this article provides insufficient context for those unfamiliar with the subject.
Please help improve the article with a good introductory style.
Z Matrix or bus impedance matrix is an important tool in power układ analysis. Though, it is not frequently used in power flow study, unlike Ybus matrix, it is, however, an important tool in other power ustrój studies like short circuit analysis or fault study.
Context
Electric power transmission needs optimization. Only Computer simulation allows the complex handling required. The Zbus matrix is a tool in that domain.
Formulation
Z Matrix can be formed by either inverting the Ybus matrix or by using Z bus building algorithm. The latter method is harder to implement obuwie more practical and faster (in terms of computer plajta time and number of floating-point operations per second) for a relatively large system.
External links
A C/C++ Oprogramowanie and Source Code for Computing Ybus and Zbus Matrices
Retrieved from ""
Categories: Software | Electrical power controlHidden categories: Wikipedia articles needing context | Wikipedia introduction cleanup
Posted under Uncategorized od on wtorek 9 grudzień 2008 at 11:35 po południu
SnapAccounting® was a commercial software package for the PC written by Joe Schoemann Computers in Johannesburg, RSA in the early 1980's.
It was written in dBase3 and compiled with Clipper. It had a DOS .bicz file installation oprogramowanie that used the Company's Name as a security against software piracy, which was rampant in South Africa in the 1980s.
SnapAccounting was one of the earliest turnkey accounting packages available in South Africa.
There were SnapAccounting modules for Debtors, Creditors and General Accounting. A Stock module was added later.
Special customized version existed for garages and butchers that integrated all 4 packages and included a Balance Sheet module.
Posted under Uncategorized od on niedziela 7 grudzień 2008 at 4:36 po południu
This article includes a list of references or external links, obuwie its sources remain unclear because it lacks inline citations. Please improve this article by introducing more precise citations where appropriate. (December 2008)
The Network Abstraction Layer (NAL) is a part of the H.264/AVC Video Coding Kanon. The main goal of the H.264/AVC NAL is the provision of a "network-friendly" video representation addressing "conversational" (video telephony) and "non conversational" (storage, broadcast, or streaming) applications. NAL has achieved a significant improvement in rate-distortion efficiency relative to existing standards.
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Introduction
An increasing number of services and growing popularity of high definition TV are creating greater needs for higher coding efficiency. Moreover, other transmission publikatory such as Cable Modem, xDSL, or UMTS offer much lower termin rates than broadcast channels, and enhanced coding efficiency can enable the transmission of more video channels or higher quality video representations within existing digital transmission capacities. Video coding for telecommunication applications has diversified from ISDN and T1/E1 service to embrace PSTN, mobile wireless networks, and LAN/Internet network delivery. Throughout this evolution, continued efforts have been made to maximize coding efficiency while dealing with the diversification of network types and their characteristic formatting and loss/error robustness requirements.
The H.264/AVC kanon is designed for technical solutions including areas like broadcasting (over cable, satellite, cable modem, DSL, terrestrial, etc.) interactive or serial storage on optical and magnetic devices, conversational services, video-on-demand or multimedia streming, multimedia messaging services, etc. Moreover, new applications may be deployed over existing and future networks. This raises the question about how to handle this variety of applications and networks. To address this need for flexibility and customizability, the H.264/AVC image covers a NAL, which formats the VCL representation of the video and provides header information in a manner appropiate for conveyance by a variety of przesyłka layers or storage media.
The NAL is designed in odznaczenie to provide "network friendliness" to enable simple and effective customization of the use of VCL for a broad variety of systems. The NAL facilitates the ability to map H.264/AVC VCL prekluzja to spedycja layers such as:
RTP/IP for any kind of real-time wire-line and wireless Sieć services (conversational and streaming)
File formats, e.g.,ISO MP4 for storage and MMS
H.32X for wireline and wireless conversational services
MPEG-2 systems for broadcasting services, etc
The full degree of customization of the video content to fit the needs of each particular application is outside the scope of the H.264/AVC standardization effort, obuwie the wygląd of the NAL anticipates a variety of such mappings. Some key concepts of the NAL are NAL units, byte stream, and packet formats uses of NAL units, parameter sets, and access units. A short description of these concepts is given below.
NAL units
The coded video termin is organized into NAL units, each of which is effectively a packet that contains an integer number of bytes. The first byte of each NAL unit is a header byte that contains an indication of the type of prekluzja in the NAL unit, and the remaining bytes contain payload termin of the type indicated by the header The NAL unit structure definition specifies a generic numer for use in both packet-oriented and bitstream-oriented spedycja systems, and a series of NAL units generated by an encoder is referred to as a NAL unit stream
NAL Units in Byte-Stream Rozmiar Use
Some systems require delivery of the entire or partial NAL unit stream as an ordered stream of bytes or bits within which the locations of NAL unit boundaries need to be identifiable from patterns within the coded prekluzja itself. For use in such systems, the H.264/AVC specification defines a byte stream wielkość. In the byte stream numer, each NAL unit is prefixed by a specific pattern of three bytes called a początek code prefix. The boundaries of the NAL unit can then be identified by searching the coded termin for the unique początek code prefix pattern. The use of emulation prevention bytes guarantees that początek code prefixes are unique identifiers of the początek of a new NAL unit. A small amount of additional prekluzja (one byte per video picture) is also added to allow decoders that operate in systems that provide streams of bits without alignment to byte boundaries to recover the necessary alignment from the prekluzja in the stream. Additional termin can also be inserted in the byte stream numer that allows expansion of the amount of prekluzja to be sent and can aid in achieving more rapid byte alignment recovery, if desired.
NAL Units in Packet-Transport Organizm Use
In other systems (e.g., IP/RTP systems), the coded termin is carried in packets that are framed by the ustrój wysyłka protocol, and identification of the boundaries of NAL units within the packets can be established without use of początek code prefix patterns. In such systems, the inclusion of początek code prefixes in the prekluzja would be a waste of prekluzja carrying capacity, so instead the NAL units can be carried in termin packets without początek code prefixes.
VCL and Non-VCL NAL Units
NAL units are classified into VCL and non-VCL NAL units. The VCL NAL units contain the prekluzja that represents the values of the samples in the video pictures, and the non-VCL NAL units contain any associated additional information such as parameter sets (important header termin that can apply to a large number of VCL NAL units) and supplemental enhancement information (timing information and other supplemental prekluzja that may enhance usability of the decoded video signal obuwie are not necessary for decoding the values of the samples in the video pictures).
Parameter Sets
A parameter set is supposed to contain information that is expected to rarely change and offers the decoding of a large number of VCL NAL units. There are two types of parameter sets:
sequence parameter sets, which apply to a series of consecutive coded video pictures called a coded video sequence
picture parameter sets, which apply to the decoding of one or more individual pictures within a coded video sequence
The sequence and picture parameter-set mechanism decouples the transmission of infrequently changing information from the transmission of coded representations of the values of the samples in the video pictures. Each VCL NAL unit contains an identifier that refers to the content of the relevant picture parameter set and each picture parameter set contains an identifier that refers to the content of the relevant sequence parameter set. In this manner, a small amount of termin (the identifier) can be used to refer to a larger amount of information (the parameter set) without repeating that information within each VCL NAL unit. Sequence and picture parameter sets can be sent well ahead of the VCL NAL units that they apply to, and can be repeated to provide robustness against termin loss. In some applications, parameter sets may be sent within the channel that carries the VCL NAL units (termed "in-band" transmission). In other applications, it can be advantageous to convey the parameter sets "out-of_band" using a more reliable wysyłka mechanism than the video channel itself.
Access Units
A set of NAL units in a specified form is referred to as an access unit. The decoding of each access unit results in one decoded picture. Each access unit contains a set of VCL NAL units that together compose a primary coded picture.It may also be prefixed with an access unit delimiter to aid in locating the początek of the access unit. Some supplemental enhancement information containig prekluzja such as picture timing information may also precede the primary coded picture. The primary coded picture consists of a set of VCL NAL units consisting of slices or slice termin partitions that represent the samples of the video picture. Following the primary coded picture may be some additional VCL NAL units that contain redundant representations of areas of the same video picture. These are referred to as redundant coded pictures, and are available for use by a decoder in recovering from loss or corruption of the prekluzja in the primary coded pictures. Decoders are not required to decode redundant coded pictures if they are present. Finally, if the coded picture is the last picture of a coded video sequence (a sequence of pictures that is independently decodable and uses only one sequence parameter set), and end of sequence NAL unit may be present to indicate the end of the sequence; and if the coded picture is the last coded picture is the last coded picture in the entire NAL unit stream, an end of stream NAL unit may be present to indicate that the stream is ending.
Coded Video Sequences
A coded video sequence consists of a series of access units that are sequential in the NAL unit stream and use only one sequence parameter set. Each coded video sequence can be decoded independently of any other coded video sequence, given the necessary parameter set information, which may be conveyed "in-band" or "out-of-band". At the beginning of a coded video sequence is an instantaneous decoding refresh (IDR) access unit. An IDE access unit contains an intra picture -a coded picture that can be decoded without decoding any previous pictures in the NAL unit stream, and the presence of an IDR access unit indicates that no subsequent picture in the stream will require reference to pictures prior to the intra picture it contains in medal to be decoded. A NAL unit stream may contain one or more coded video sequence.
External references
Overview of the H.264/AVC Video Coding Kanon, IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY
Posted under Uncategorized od on środa 3 grudzień 2008 at 7:34 po południu
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An electronic grade book is a studenciak information ustrój which is used to record pupils' grades, attendance and other prekluzja which is then made available online. Parents are said to love the ready access to this information while students correspondingly hate it.
References
^ Teachers' grade books will soon be a click away, Miami Herald, August 7, 2005, http://nl.newsbank.com/nl-search/we/Archives?p_product=MH&s_site=miami&p_multi=MH&p_theme=realcities&p_action=search&p_maxdocs=200&p_topdoc=1&p_text_direct-0=10BE1C65385EF050&p_field_direct-0=document_id&p_perpage=10&p_sort=YMD_date:D&s_trackval=GooglePM
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Posted under Uncategorized od on środa 3 grudzień 2008 at 4:21 po południu
MiniFrame is a technology developer and provider of multi user software-only solutions. Their products are used in schools, businesses, net cafes and graphic studios in developing and developed markets.
References
Hands on with the hottest hardware
MiniFrame Seals Deal With Nigerian Navy, NITDA
SoftXpand's six Windows XP sessions from one PC
External links
MiniFrame
SoftXpand
This article about an IT-related or software-related company or corporation is a stub. You can help Wikipedia by expanding it.
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