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| NEW SECURE LOGIC 20710 Digital Keypad Steel Wall Vault Gun Safe - Instant Access | | | US $89.99 | 16d 4h 6m |
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| | Logic $111.53 Logic. Definitions of logic, History of logic, Organon, Propositional calculus, Modal logic, Informal logic, Mathematical logic, Philosophical logic, Principle of bivalence, Is logic empirical?, Paradoxes of material implication, Paraconsistent logic, Metalogic, Logic puzzle, Mathematics, Table of logic symbols, Digital electronics, Truth, Reason Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 184 Publication Date: 2010/07/25 Language: English Dimensions: 5.98 x 9.01 x 0.42 inches |
| | 2PK 4GB SECURE DIGITAL SD $26.99 2PK 4GB SECURE DIGITAL SD |
| | SECURE LOGIC 20710 Digital Keypad Steel Wall Vault Gun Safe - Instant Access $99.99 Drop Down Door: Allows you to install in compressed spaces Immediate Access When You Need It: Door Can be Opened In Less Than 2 seconds Protects All Your Valuables: Jewlrey, Guns, Cash, Small Electronics Versatile Storage Space: Additional Hidden Storage Underneath the Main Fabric-Lined Dompartment Easy Operation: Programs in Minutes (DIY) Do It Yourself Installation: 20-30 Minutes, See Videos Below Built to Withstand Forced Entry: Pry-Bar Safe, 12 & 14 Gauge Steel Battery Operated: Long Lasting 12 Volt Rechargeable Battery w/ Charger Hidden Back-Up Lock: Comes with Key for Immediate Back-Up Access Digital Keypad Entry System: Can store multiple unique codes Exterior Dimensions When Closed: 15.5" x 4.5" x 16.25 Exterior Dimensions When Open: 23" x 4.5" x 16.25 Weight: 25lbs - 11.34kgs Included In Box: Wall Vault (2) Back Up Keys Battery & Charger User Guide Mounting Template Mounting Hardware Color: As Shown |
| | Digital Logic Design (Paperback) $235.27 The perfect complement to computer architecture and logic texts. This widely praised tutorial and lab book gives practice in the fundamentals of digital logic and circuitry, with special emphasis on how the machine operates at the gate and register level. Presentation employs the TTL family of digital logic due to its wide availability and moderate cost. Exercises require the student to perform a simple designs and then implement them on hardware. Contains sufficient exercises for a 3-hour lab meeting, once a week, for a semester. |
| | Duracell Secure Digital (SD) Card $25.99 1 8 GB 8GB Secure Digital (SD) Card DU-SD08GCM-C Duracell Procter & Gamble Secure Digital (SD) Secure Digital (SD) Card www.pg.com |
| | Panasonic 2GB Secure Digital Card $75.99 1 2 GB 2GB Secure Digital Card Panasonic 2GB Secure Digital Memory Card with SD Speed Class 2 Performance. Panasonic RP-SDR02GU1A Secure Digital (SD) Secure Digital (SD) Card www.panasonic.com |
| | 256MB Secure Digital (SD) Card $7.99 256MB Secure Digital card for digital devices such as MP3's PDA's handhelds and digital cameras that have a Secure Digital card slot |
| | Secure Logic 20321 White Secure Mail Vault $336.15 The solid steel construction and seamless powder coated finish make the Secure Mail Vault virtually indestructible. The massive steel mounting pole provides the necessary stability to withstand many years of active use. Once in place it s not going anywhere Great for people who travel or have vacation homes. Features:. White finish. Vault Style Design. Electronic Keypad Entry System. Large Storage Capacity. Easy Operation. DIY Installation. Built to Withstand Forced Entry. Designed to Withstand the Elements. Battery Operated. Outbound Mail Clip and Flag. Hidden BackUp Lock. All Inclusive. U.S.P.S Postmaster Approved. Keypad entry. Steel construction. Unique design. Hinged mail slot. Assembly Required. Dimension: 18 inches in length 12 inches in height 21 inches from fronttoback. |
| | Secure Logic 20322 Black Secure Mail Vault $336.15 The solid steel construction and seamless powder coated finish make the Secure Mail Vault virtually indestructible. The massive steel mounting pole provides the necessary stability to withstand many years of active use. Once in place it s not going anywhere Great for people who travel or have vacation homes. Features:. Black finish. Vault Style Design. Electronic Keypad Entry System. Large Storage Capacity. Easy Operation. DIY Installation. Built to Withstand Forced Entry. Designed to Withstand the Elements. Battery Operated. Outbound Mail Clip and Flag. Hidden BackUp Lock. All Inclusive. U.S.P.S Postmaster Approved. Keypad entry. Steel construction. Unique design. Hinged mail slot. Assembly Required. Dimension: 18 inches in length 12 inches in height 21 inches from fronttoback. |
| | Secure Logic 20323 Tan Secure Mail Vault $336.15 The solid steel construction and seamless powder coated finish make the Secure Mail Vault virtually indestructible. The massive steel mounting pole provides the necessary stability to withstand many years of active use. Once in place it s not going anywhere Great for people who travel or have vacation homes. Features:. Tan finish. Vault Style Design. Electronic Keypad Entry System. Large Storage Capacity. Easy Operation. DIY Installation. Built to Withstand Forced Entry. Designed to Withstand the Elements. Battery Operated. Outbound Mail Clip and Flag. Hidden BackUp Lock. All Inclusive. U.S.P.S Postmaster Approved. Keypad entry. Steel construction. Unique design. Hinged mail slot. Assembly Required. Dimension: 18 inches in length 12 inches in height 21 inches from fronttoback. |
| | CEIVA Broadband Adapter for Logic Digital Frames $29.99 CEIVA Broadband Adapter for Logic Digital Photo Frame - CEIVA BBDADPATER |
| | 8 GB Secure Digital High Capacity (SDHC) $18.95 Secure Digital High Capacity (SDHC) |
| | Transcend 512MB Secure Digital Card $21.99 0.07 oz 1 512 MB 512MB Secure Digital Card 512MB Secure Digital Card Warranty Card Carrying Case Quick Installation Guide Transcend Secure Digital Card is suitable for use in a wide variety of devices including, Digital Cameras, Mobile Phones, PDAs, MP3 Players, Notebook computers and other electronic devices. Cellular Phone Digital Camera Lifetime MP3 Player Notebook PDA Secure Digital (SD) Secure Digital (SD) Card TS512MSDC Transcend Transcend Information, Inc www.transcendusa.com |
| | Transcend 2GB Secure Digital Card $7.99 0.07 oz 1 2 GB 2GB Secure Digital Card 2GB Secure Digital Card Warranty Card Carrying Case Quick Installation Guide Transcend Secure Digital Card is suitable for use in a wide variety of devices including, Digital Cameras, Mobile Phones, PDAs, MP3 Players, Notebook computers and other electronic devices. Cellular Phone Digital Camera Lifetime MP3 Player Notebook PDA Secure Digital (SD) Secure Digital (SD) Card TS2GSDC Transcend Transcend Information, Inc www.transcendusa.com |
| | Digital Logic $17.5 No Synopsis Available |
| | Logic Gate $103.56 A logic gate performs a logical operation on one or more logic inputs and produces a single logic output. The logic normally performed is Boolean logic and is most commonly found in digital circuits. Logic gates are primarily implemented electronically using diodes or transistors, but can also be constructed using electromagnetic relays, fluidics, optics, molecules, or even mechanical elements. In electronic logic, a logic level is represented by a voltage or current, (which depends on the type of electronic logic in use). Each logic gate requires power so that it can source and sink currents to achieve the correct output voltage. In logic circuit diagrams the power is not shown, but in a full electronic schematic, power connections are required. Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 140 Publication Date: 2009/12/28 Language: English Dimensions: 5.98 x 9.01 x 0.32 inches |
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The Network Camera: Security Video Utilizing A LAN
Unless you buy old equipment, you are unlikely to implement a completely analog video security system today. Digital technology has made pure analog video security technology virtually obsolete. The digital video recorder (DVR) replaces what would have been a VCR a few years ago. Almost all systems now include the ability to view the video from your cameras over a computer network, including the Internet.
The current debate concerns the Internet Protocol (IP) camera. It is important to note the difference between a “web camera” and an “IP camera”. A web camera generally connects to the USB port of a computer and utilizes the resources of the computer to function, but an IP camera is independent of a host computer, at least to a degree.
IP Cameras: Surveillance Technology of the Future
There is a certain amount of inevitability to the IP camera. The question is when, not if, the IP camera will come to dominate the security camera market. IP camera installation is easier because the network cabling is less expensive and much less bulky than the coaxial cable normally used for analog cameras. There is a certain presumption that anything digital will be better than its analog alternative, but in this case, the reality is more complicated. Like most new technologies, a certain amount of “oversell” by the IP camera companies marketing their products should be expected. It is important to recognize the issues associated with IP cameras.
IP Cameras: Issues with Current Implementation
IP camera technology does have its issues. The first problem is expense. IP cameras with comparable image quality are still significantly more expensive than an analog alternative. The second problem is the bandwidth to communicate the video is a challenge for conventional networks if more than one or two cameras are employed. When making comparisons between analog and IP cameras, similar image specifications should be used, otherwise the decision will based on the novelty of the technology, not the performance.
An IP camera can be found at about the same price as an analog camera, but not if the two cameras have comparable performance. For example, IP cameras generally have less impressive low-light sensitivity specifications (1-4 Lux typical) than analog cameras (0.001-0.8 Lux typical). Excellent quality IP cameras are available: for example the Cisco 2500 has a sensitivity of 0.4 Lux with more than 100 dB dynamic range, but the Cisco 2500 retails for more than $800. A comparable analog camera would sell for less than $300.
The other problem with IP cameras is the signal bandwidth needed to link the camera to the system network. It is feasible to install an IP camera on an existing network, but the impact multiple cameras will have on your system’s network performance should be considered, especially if many cameras are to be installed. If a dedicated star network topology (home runs) is to be installed solely for the use of the cameras, then this problem may be avoided.
A single IP video camera with a resolution of 640x480 pixels at 30 frames per second (M-JPEG) requires about 8 Mbit/second of bandwidth. For comparison, the Ethernet (10BASE-X) specification is 10 Mbit/s maximum.
There are two approaches to the use of IP cameras. The first approach converts the video signal from analog to digital at the camera. This camera will incorporate enough computational ability to function in a network environment, including an operating system stored on a small flash memory module. The second approach is a decentralized design. This camera includes the ability to truly operate independently. It can store video until needed, and it has true video analytic capability (artificial intelligence). With this artificial intelligence, if an alarm condition exists, the camera can make this determination, and contact the host.
IP Design Alternative 1: Digitized Video
This is the more common approach currently. With this design the digital camera captures the image, and constantly communicates the video as a digitized signal over a computer network to a video server (computer). The server owns the responsibility for processing and storing the video. Even though the camera must have some computation capability to communicate over a network, it has little if any on-board capability for logic functions and storage. Remember that video will require a significant microprocessor, RAM, and video storage for even limited manipulation.
IP Design Alternative 2: Decentralized Logic
If sophisticated decentralized processing (video analytics) could be cost-effectively deployed on IP cameras, the transition to IP cameras would be dramatically accelerated. A few companies such as D-Link, and Linksys have introduced digital cameras that have integrated web servers so that no external computers are needed for communication, but this is different from the ability to analyze at the point of capture and store the video locally.
On-board logic and video storage would eliminate the need for all video to be constantly communicated to the host, and would solve the bandwidth problem. Video that needed to be reviewed could be requested by the host only when needed.
There are cameras available with these features, but they can be very expensive. Sometimes these functions are added in a separate module local to the camera called an “Intelligent Video Server”. An example of a design with logic and storage are some of the cameras offered by the Swedish company Axis Communications (Note: not all cameras from Axis are suitable for a decentralized logic system).
Conclusion
When large systems of IP cameras are employed, if a dedicated star topology network is not employed, compromises will need to be made to reduce costs and bandwidth requirements. The resolution and frame-rate are the most common compromises.
A survey of technology professionals estimates that the IP camera will become dominant when there is less than $100 difference from the analog camera. As the price of technology continues to drop, the IP camera will be more competitive, but it could take many years.
About the Author
Brian Bradshaw is G.M. of B.V. Technology in Plano Texas. B.V. Tech specializes in communications technology, including video security. Website: B.V. Technology.
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1. no idea.
2. A buffering solution of phosporic acid can be used in an emergency of severe mineral build up, cat tails or peat in your inline filter will supply slightly acidic buffering – active charcoal may be needed to maintain stratum clarity. Be sure to sterilize any natural materials before use.
3. An infrared or dial inline thermometer is the most accurate. What you need is a liquid crystal one for easy verification. A lab grade mercury one is the most accurate to verify the liquid crystal one – but not cheap.
4. Neon tetras are very prolific and adaptable. You should set them up in their own tank so the other inhabitants won't graze on the eggs.
5. If you have good aeration, your fish stock will be healthy and resist disease very well. The 20 percent water changes 3 times a month will solve your pH problem and keep your nitrate levels from becoming toxic. Overpopulation will reduce life expectancy because of stress – for example, a harlequin with a normal range of 5 to 6 year life span may only last one or two.
6. Titration tests (control top droppers) are always more accurate.
A good fish atlas (Baensch) is always a good investment if you are deciding to breed fish. Your local specialist is also a very well informed source.
I am always open to futher questions.
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1) I don't think petco does, and I don't have any petlands near me.
2)There are chemicals, but they are a temporary fix and are often pretty harsh on the fish with the whole up and down of chemistry. If it's not that bad, I suggest leaving it rather than chemically treating it.
3) I believe that mercury, I think most are mercury, is the most accurate.
4) sorry, no idea : ( but I hear golds hard to achieve
5)You must have great filtration and hardy stock : ) My 60 is overstocked, technically, but I've had more problems in my 20 than the over done 60 has ever had. Good healthy fish, good water quality management, regular changes and not overfeeding are all great ways to have a happy healthy tank. You've probably also got pretty calm and easy going fish. A packed aggressive tank is different than a packed community tank with apporpriate fish living together.
6) The drip ones are far more accurate.
Hope this helps, Best of Luck!