Showing papers on "Guard (information security) published in 2007"
TL;DR: This paper introduces the concept of a guard zone, defined as the region around each receiver where interfering transmissions are inhibited, using stochastic geometry to derive the guard zone size that maximizes the transmission capacity for spread spectrum ad hoc networks.
Abstract: In ad hoc networks, it may be helpful to suppress transmissions by nodes around the desired receiver in order to increase the likelihood of successful communication. This paper introduces the concept of a guard zone, defined as the region around each receiver where interfering transmissions are inhibited. Using stochastic geometry, the guard zone size that maximizes the transmission capacity for spread spectrum ad hoc networks is derived - narrowband transmission (spreading gain of unity) is a special case. A large guard zone naturally decreases the interference, but at the cost of inefficient spatial reuse. The derived results provide insight into the design of contention resolution algorithms by quantifying the optimal tradeoff between interference and spatial reuse in terms of the system parameters. A capacity increase relative to random access (ALOHA) in the range of 2 - 100 fold is demonstrated through an optimal guard zone; the capacity increase depending primarily on the required outage probability, as higher required QoS increasingly rewards scheduling. Compared to the ubiquitous carrier sense multiple access (CSMA) which essentially implements a guard zone around the transmitter rather than the receiver - we observe a capacity increase on the order of 30 - 100%
330 citations
17 Dec 2007
TL;DR: In this paper, an in-depth study of major security threats are made and a decision tree has been built for evidence mining to help the law enforcement agencies and establish network crimes.
Abstract: Today the Internet technology has made it possible to form virtual communities in the cyber space thereby facilitating different types of electronic transactions. There is also a negative force to this technology, which is trying to threaten the security aspects. In order to guard against such threats one must adopt a well-planned approach and apply it systematically. In this paper, an in-depth study of major security threats are made and a decision tree has been built for evidence mining to help the law enforcement agencies and establish network crimes.
36 citations
Patent•
21 Sep 2007TL;DR: A hand-held power tool for a rotating tool has a machine housing with a machine neck, a guard for at least partially covering the tool and detachably attached to the machine neck as discussed by the authors.
Abstract: A hand-held power tool for a rotating tool has a machine housing with a machine neck, a guard for at least partially covering the tool and detachably attached to the machine neck and including a guard neck, a clamping cuff for detachably attaching the guard to the machine neck, and an engagement structure including an engagement element provided on the clamping cuff and at least one recess for engagement of the engagement element provided on the guard neck, or on the guard neck and the machine neck, to form a rotational lock that acts between the machine neck and guard, and the clamping cuff is a separate component attached to the machine housing.
35 citations
Book•
25 May 2007
TL;DR: The efforts undertaken by civilian and military organizations in response to Hurricane Katrina were historically unprecedented, but a number of changes would enhance future Army and National Guard disaster-response efforts, including preparing governors to call up Guard units for out-of-state emergencies and the creation of regional standing homeland security task forces.
Abstract: The efforts undertaken by civilian and military organizations in response to Hurricane Katrina were historically unprecedented, but a number of changes would enhance future Army and National Guard disaster-response efforts, including preparing governors to call up Guard units for out-of-state emergencies and the creation of regional standing homeland security task forces.
33 citations
Book•
31 Mar 2007
31 citations
Patent•
25 Sep 2007TL;DR: In this article, a guard system for a coupling that connects a first component to a second component in a pressurized machinery system includes a coupling guard moveable between an open position, which allows access to an internal region of the coupling, and a closed position, forming a seal surrounding the coupling from the first components to the second component.
Abstract: A guard system for a coupling that connects a first component to a second component in a pressurized machinery system includes a coupling guard moveable between an open position, which allows access to an internal region of the coupling, and a closed position, which forms a seal surrounding the coupling from the first component to the second component. The system also includes a guide for directing movement of the coupling guard.
31 citations
Patent•
23 Oct 2007
TL;DR: In this paper, a system and methodologies are described that facilitate guard bandwidth independent mapping and de-mapping of bandwidth in a wireless communication system, where broadcast signals can be created as if all bandwidth were available, and guard bandwidth can be initialized over the utilized bandwidth such to puncture the data existing in the guard bandwidth.
Abstract: Systems and methodologies are described that facilitate guard bandwidth independent mapping and de-mapping of bandwidth in a wireless communication system. Broadcast signals can be created as if all bandwidth were available, and guard bandwidth can be initialized over the utilized bandwidth such to puncture the data existing in the guard bandwidth. Upon decoding the broadcast signal, size of the guard bandwidth can be predetermined or estimated allowing a center portion of the signal to be decoded without decoding the guard bandwidth. In this regard, the decoder of the signal need not find exact positions of the guard bandwidth as transforming and decoding the center portion can provide a substantial portion of the signal to interpret the signal.
20 citations
Patent•
20 Nov 2007
TL;DR: In this article, the first node is arranged to communicate over a communication channel with at least one user equipment within the cell, and the communication is made by using a frame comprising uplink resources and downlink resources with a switching point between the downlink resource and the uplink resource.
Abstract: Method and arrangements for scheduling transmission resources in a first node in a cell comprised within a wireless communication network. The first node is arranged to communicate over a communication channel with at least one user equipment within the cell. The communication is made by using a frame comprising uplink resources and downlink resources with a switching point between the downlink resources and the uplink resources. The method comprises the step of obtaining a parameter referring to the expected transmission quality of the communication and/or the expected coherence properties of the communication channel. The method also comprises scheduling a transmission on an uplink or downlink resource. The resource is located on a time distance from the switching point. The time distance is based on the obtained parameter.
18 citations
Patent•
28 Jun 2007
TL;DR: In this article, an overhead guard is coupled to a suitable support structure of a materials handling vehicle (10) so as to extend generally over at least a portion of an operator's compartment (20) of the vehicle.
Abstract: An overhead guard (100) comprises a guard frame (106, 116) and a plurality of guard members (140). The guard frame is coupled to a suitable support structure of a materials handling vehicle (10) so as to extend generally over at least a portion of an operator's compartment (20) of the vehicle. The guard frame is oriented at an angle having a magnitude that is at least five degrees relative to the horizontal, and is angled upward towards a load handling assembly (12) of the vehicle, at least in an area of the guard situated between a normal vehicle operating position and the load handling assembly. The plurality of guard members are supported by the guard frame at least within an area generally over the operator's compartment of the vehicle.
TL;DR: This paper discusses the classes of polygon-bounded grids and simple grids for which a quadratic time algorithm is proposed for solving the problem of finding the minimum weakly cooperative guard set (MinWCMG), and proves that the MinWCMG problem is NP-hard even for grids in which every segment crosses at most three other segments.
Abstract: A grid P is a connected union of vertical and horizontal segments. A mobile guard is a guard which is allowed to move along a grid segment, thus a point x is seen by a mobile guard g if either x is on the same segment as g or x is on a grid segment crossing g. A set of mobile guards is weakly cooperative if at any point on its patrol, every guard can be seen by at least one other guard. In this paper we discuss the classes of polygon-bounded grids and simple grids for which we propose a quadratic time algorithm for solving the problem of finding the minimum weakly cooperative guard set (MinWCMG). We also provide an O(nlogn) time algorithm for the MinWCMG problem in horizontally or vertically unobstructed grids. Next, we investigate complete rectangular grids with obstacles. We show that as long as both dimensions of a grid are larger than the number of obstacles k, k+2 weakly cooperative mobile guards always suffice to cover the grid. Finally, we prove that the MinWCMG problem is NP-hard even for grids in which every segment crosses at most three other segments. Consequently, the minimum k-periscope guard problem for 2D grids is NP-hard as well, and this answers the question posed by Gewali and Ntafos [L.P. Gewali, S. Ntafos, Covering grids and orthogonal polygons with periscope guards, Computational Geometry: Theory and Applications 2 (1993) 309-334].
Patent•
21 Nov 2007
TL;DR: In this article, a security system of an automatic monitoring system that is used to guard the automatic monitoring systems from theft is described. But the security system uses a sensing device to detect the movement or vibration of the monitoring system and produces a sense signal that will be processed by an information processing device to produce and send out a warning signal to guard a monitoring system against theft.
Abstract: The invention is related to a security system of an automatic monitoring system that is used to guard the automatic monitoring system from theft. The security system uses a sensing device to detect the movement or vibration of the monitoring system and produces a sense signal that will be processed by an information processing device to produce and send out a warning signal to guard the automatic monitoring system against theft and track the position after being moved.
Patent•
21 Nov 2007
TL;DR: In this paper, an offensive/defensive muzzle protection device was proposed to provide the most stable engineered platform to date for a pistol accessory mount/impact face to wit: the unique attachment fastening system to the trigger guard.
Abstract: A length and width varying multiple mount, impact face, muzzle protective pistol attachment with custom trigger guard to give the end user a multitude of choices of where to mount third party products, systems and devices. Give the end user an offensive/defensive muzzle protection device in which to provide the most stable engineered platform to date for a pistol accessory mount/impact face to wit: The inventive device includes the unique attachment fastening system to the trigger guard.
Patent•
26 Sep 2007
TL;DR: In this paper, a weatherproof outdoor electrical connection guard for protecting electrical extension cord plug connections, especially in wet environments, is presented, which includes a protective housing for covering the point of connection between an extension plug and the mating plug from a power consuming device inserted therein.
Abstract: The present invention provides new weatherproof outdoor electrical connection guard for protecting electrical extension cord plug connections, especially in wet environments. The guard includes a protective housing for covering the point of connection between an extension cord plug and the mating plug from a power-consuming device inserted therein. A catch is provided to removably secure the connected cords within the housing. An elongated stake is provided for securing the connection guard in an elevated position above the ground. The connection guard further includes ventilation for moisture and heat dissipation.
Patent•
22 Aug 2007
TL;DR: In this article, a method for controlling a coming call firewall of mobile terminal includes setting black list telephone and switching-on time interval of a coming-call firewall, switching one or multiple firewall on, judging whether switching-time interval of said firewall is entered or not according to current time of mobile terminals.
Abstract: A method for controlling a coming call firewall of mobile terminal includes setting black list telephone and switching-on time interval of a coming call firewall, switching one or multiple firewall on, judging whether switching-on time interval of said firewall is entered or not according to current time of mobile terminal and starting up coming call firewall corresponding to switching-on time interval if it is then refusing the coming call of black list in said coming call firewall.
Patent•
14 Dec 2007
TL;DR: Integrated hand and control protection system for vehicles utilizing handlebars for steering, consisting of; hand/controls guards (guards), integral/stowable mirror assembly, damper mount, display guard and integral electrical accessory mounting provisions.
Abstract: Integrated hand and controls protection system for vehicles utilizing handlebars for steering, consisting of; hand/controls guards (guards), integral/stowable mirror assembly, damper mount, display guard and integral electrical accessory mounting provisions.
01 Jan 2007
Patent•
18 Sep 2007
TL;DR: In this article, a lock guard is provided for padlocks securing different type J-hook latches of roll up doors in their locking position, thereby deterring vandals use of cutting tools to sever the shackle.
Abstract: A lock guard is provided for padlocks securing different type J-hook latches of roll up doors in their locking position. The lock guard shrouds the shackle of the padlock thereby deterring vandals use of cutting tools to sever the shackle.
Patent•
14 Mar 2007
TL;DR: In this article, the utility model is used to implement an automatic lifting protection fence that can be lifted and landed with an arranged lifting device, which is very easy to install and implement.
Abstract: The utility model relates to a protection fence, in particular to an automatic lifting fence applied in crosswalks or crossroads for the safety of pedestrians. The technical scheme adopted by the utility model is as follow that an automatic lifting protection fence can be lifted and landed with an arranged lifting device. Through the adoption of the program above, the utility model overcomes the disadvantages of the existing technology, providing a new automatic lifting fence that affects neither city appearance nor normal road operations, and is very easy to install and implement.
Patent•
04 Apr 2007
TL;DR: In this paper, the authors defined the width of guard band reserved at both ends of frequency band according to the requirement of spectrum mask, and the carrier separation according to traveling speed and delay spread supported by OFDM.
Abstract: The method comprises: at first, defining the width of guard band reserved at both ends of frequency band according to the requirement of spectrum mask; then getting the carrier separation according to the traveling speed and delay spread supported by OFDM; finally, defining the numbers of guard subcarriers at both ends according to the defined guard band width and subcarrier separation
Patent•
21 Dec 2007
TL;DR: In this article, a removable protective guard (10) for use with a portable electronics device (20) is made of resiliently deformable material and defines a shape adapted to fit around a periphery of the device.
Abstract: A removable protective guard (10) for use with a portable electronics device (20) is made of resiliently deformable material and defines a shape adapted to fit around a periphery of the device (20). Outer surface (11) of the guard (10) may be suitably decorated. Corner pieces (12A - 12D) of the guard (10) form an interlock with the device (20) and act to retain the guard (10) in position around the device (20). Guard (10) does not interfere with use of device (20) when fitted.
Patent•
17 Dec 2007
TL;DR: In this paper, a device for the protection of vehicle door interiors while transporting things that might damage the door is provided, which may be removably installed on the interior of vehicle doors and at least temporarily secured in place.
Abstract: A device for the protection of vehicle door interiors while transporting things that might damage the door is provided. In exemplary form, the device may be removably installed on the interior of vehicle doors and at least temporarily secured in place while the door is open. Closing the door may further serve to secure the device in place, preventing it from being accidentally dislodged.
Patent•
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05 Jan 2007
Abstract: A corner guard made for installation in floor corners is disclosed. The corner guard may be made of flexible material and have three seating surfaces and a front face. Two of the seating surfaces are positioned adjacent to intersecting wall sections, and the third surface is positioned adjacent to the floor. The edge of the guard adjacent the floor will often be radiused to facilitate cleaning. Once installed the guard improves the overall cleanliness and appearance of a room by preventing dirt or debris from accumulating in difficult to clean corners.
Patent•
07 Nov 2007
TL;DR: In this article, a fail-safe mechanism constituted by the guard rail and guard wheels attached to the vehicle is proposed, which is equipped with automatic steering mechanisms for steering front and rear wheels.
Abstract: Structure of a bifurcation site and crossover site of a guideway in a guided vehicle transportation system; in which the guideway consists of left and right roadbeds, a depression between the roadbeds, and a guard rail having a U-shaped groove laid down on the depression; and a fail-safe mechanism is constituted by the guard rail and guard wheels attached to the vehicle; is proposed. The vehicle is equipped with automatic steering mechanisms for steering front and rear wheels and guard wheels supported laterally rotatably by front and rear supporting arms which are supported laterally rot at ably underside the vehicle. The guard wheels are received in the groove of the guard rail. A movable guard plate and driving means thereof are provided to switch connection of the groove of the guard rail at a bifurcation thereof, and a movable plate and driving means thereof are provided to be able to plug or cover each of openings of grooves of guard rails in a region where the guard rail crosses a roadbed so that the movable plate is moved to plug or cover the groove thereby preparing a flat surface level with the roadbed.
Patent•
19 Jun 2007
TL;DR: In this paper, the authors present an architecture for routing information between networks of differing security level. But the architecture of the present invention reduces the time and effort needed to attain high-assurance certification.
Abstract: The present invention is directed to routing information between networks of differing security level. Communication to/from each network is handled by a dedicated Offload Engine (OE). Each OE interfaces to a Guard Engine through a Guard Data Mover (GDM) and includes an interface for connecting to an external network. A first OE receives a data packet from a first network intended to be transmitted to a second network. The Guard Engine analyzes the data packet. The Guard Engine includes an ACL (Access Control List) which are rules data packets must meet before being passed onto a destination network. If allowed, the Guard Engine delivers the data packet to the second network via a second OE utilizing a GDM associated with the first OE and a GDM associated with the second OE. The architecture of the present invention reduces the time and effort needed to attain high-assurance certification.
Patent•
19 Sep 2007
TL;DR: In this paper, a soil guard structure in which H-beams are vertically mounted in the ground and a plurality of panels are inserted between the H-beam and the guide rail in a longitudinal direction so as to allow the insertion of the rigid metal panel is described.
Abstract: The present invention relates to a soil guard structure and an establishment method thereof. The soil guard structure in which H-beams are vertically mounted in the ground and a plurality of panels are inserted between the H-beams to stabilize the ground and prevent inflow of groundwater, wherein the panel is a rigid metal panel and the H-beam is provided with a guide rail in a longitudinal direction so as to allow the insertion of the rigid metal panel.
Patent•
31 Oct 2007TL;DR: In this article, a guided vehicle transportation system is described in the application, which includes guard wheels and a guard rail positioned along a center line of a guide track, and the guard rail has a flange extending toward the groove at the top of each side wall.
Abstract: A guided vehicle transportation system is described in the application. The system includes guard wheels and a guard rail positioned along a center line of a guide track. The guard rail has a groove in which the guard wheels are received with a predetermined clearance between the periphery of the guard wheels and side walls of the groove. The guard rail has a flange extending toward the groove at the top of each side wall. The vehicle has first arms extending in longitudinal direction and being attached rotatably at a central part of an axle provided for suspending each pair of front wheels and rear wheels, and the guard wheels are attached rotatably and directly to the both end parts of the first arms or attached rotatably to both end parts of second arms each of which is attached to a corresponding end part of the first arms.