A strobe signal shaping method for a data storage system includes receiving a strobe signal; boosting a first clock edge portion of the strobe signal when the strobe signal is received after having been idle or paused over a predetermined time period; and returning to an operating mode in which boosting is turned off with respect to a second clock edge portion of the strobe signal.

According to one embodiment, a semiconductor storage device includes a memory cell array having memory cell capable of holding N-bit data; and a sense amplifier comprising a first latch holding information on a threshold distribution, a second latch holding write data, and a third latch holding lower information of the N-bit data, and supplying a first to a fourth voltages to the memory cell to write the data to the memory cell using the first to fourth voltages. The sense amplifier supplies the first to third voltages to the memory cell based on information in the second and the third latches, and based on a result of transfer of the information held by the first latch to the second latch, supplies the fourth voltage or the first voltage to the memory cell.

According to one embodiment, a semiconductor memory device includes: first to third pages; first to third word line; and row decoder. In data writing, data is written into the first page before data is written into the second page. The row decoder is configured to apply first to third verify voltages to the gates of the first to third memory cells in a program verify operation.

A memory system may include a memory device including 0th to N-1th memory blocks, wherein N is a positive integer; and a controller having a first list and a second list, wherein the first list includes 0th to N-1th erase count values respectively for the 0th to N-1th memory blocks, wherein the second list includes 0th to N-1th difference values respectively for the 0th to N-1th memory blocks, wherein each of the 0th to N-1th difference values is a difference between an average value of the 0th to N-1th erase count values and each of the 0th to N-1th erase count values, wherein the controller selects a source block and a target block among the 0th to N-1th memory blocks depending on the 0th to N-th erase count values included in the first list and the 0th to N-1th difference values included in the second list to perform a wear leveling between the source block and the target block.

Semiconductor memory devices are provided. The semiconductor memory device includes an input/output (I/O) drive controller, a data I/O unit and a data transmitter. The input/output (I/O) drive controller generates drive control signals and an input control signal for driving first and second global I/O lines in a first test mode or a second test mode. The data I/O unit drives the first global I/O line in response to an input data when a write operation is executed in the first test mode and to drive the first and second global I/O lines in response to the drive control signals when the write operation is executed in the second test mode. The data transmitter transfers the data on the first global I/O line onto first and second local I/O lines to store the data on the first global I/O line in a memory cell array portion when the write operation is executed in the first test mode. The data transmitter also transfers the data on the first and second global I/O lines onto the first and second local I/O lines to store the data on the first and second global I/O lines in the memory cell array portion when the write operation is executed in the second test mode. Related methods are also provided.

An integrated circuit may include nonvolatile memory suitable for outputting stored data during the boot-up operation, one or more registers suitable for receiving the data output by the nonvolatile memory and storing the received data when the boot-up operation is performed, and one or more internal circuits suitable for operating using the data stored in the one or more registers. In no-update mode, although the boot-up operation is performed, a data update from the nonvolatile memory to the registers may not be performed.

Provided is a semiconductor device capable of holding data for a long period. The semiconductor device includes first to third transistors, a capacitor, and a circuit. The third transistor includes a first gate and a second gate. A gate of the first transistor is electrically connected to a first terminal of the capacitor. A first terminal of the first transistor is electrically connected to the second gate. A second terminal of the first transistor is electrically connected to the circuit. A gate of second transistor is electrically connected to a first terminal of the second transistor. A first terminal of the second transistor is electrically connected to the second gate. A second terminal of the second transistor is electrically connected to a first terminal of the capacitor. The circuit is configured to generate a negative potential. A channel formation region of the first transistor preferably includes an oxide semiconductor.

A method for fabricating a semiconductor device and a method for operating the semiconductor device are provided. The method for fabricating a semiconductor device includes forming a first electrode layer; forming a material layer, including conductive path components, over the first electrode layer; forming a second electrode layer over the material layer; performing a forming operation, which includes initially creating, in the material layer, a conductive path that electrically connects the first electrode layer to the second electrode layer by applying one of a predetermined voltage and a predetermined current between the first and second electrode layers, the conductive path including the conductive path components; and performing a first heat-treatment process at a predetermined temperature that removes some of the conductive path components from the conductive path, wherein a resistance state of the material layer changes based on the creation or dissolution of the conductive paths.

A first communication device and method therein for transmitting data information at fixed time instants on a radio channel to a second communication device in a radio communications network. First, the first communication device determines that the radio channel is available for transmitting data information to the second communication device during a time period determined by the first communication device. Then, the first communication device transmits a preamble on the available radio channel after the time period. The first communication device thereafter transmits the data information on the available radio channel to the second communication device at a next fixed time instant following the transmission of the preamble.

A time-reversal wireless system comprising a first wireless transceiver of a time-reversal client, one or more second wireless transceiver and/or a time-reversal client with the first wireless transceiver. The first wireless transceiver of the time-reversal client is wirelessly coupled to the one or more second wireless transceiver through a wireless broadband multipath channel associated with a space. The time-reversal client contains the first wireless transceiver. The time-reversal client also contains a processor and a memory configured to obtain a set of channel state information (CSI) in a channel probing phase, and/or to obtain a set of location-specific signatures based on the set of CSI and/or a time reversal operation in a channel probing phase. The set of CSI is captured when one or more probing signal is sent either from the first wireless transceiver to each of the at least one second wireless transceiver, or from each of the at least one second wireless transceiver to the first wireless transceiver, through the wireless broadband multipath channel associated with the space. A channel passband with bandwidth W0 is associated with the wireless broadband multipath channel. A first passband with bandwidth W1 is associated with the first wireless transceiver. The W1 is not larger than W0 such that the first passband is part of the channel passband. One or more second passband is associated with the one or more second wireless transceiver such that a bandwidth W2 associated with each of the one or more second passband is not larger than W1 such that the each of the one or more second passband is part of the first passband. Each of the set of CSI include a channel impulse response, a channel frequency response, and/or another channel state data of the wireless broadband multipath channel.

The present disclosure provides an auxiliary communication method and system, a device having base station function and a terminal. The auxiliary communication method includes: determining whether it is needed to provide auxiliary communication for any terminal according to channel quality of communication channels with the any terminal and data transmission requirement of the any terminal; selecting a specified terminal which is connected to the device having the base station function as an auxiliary terminal for assisting communication of the any terminal, when it is determined that it is needed to provide auxiliary communication for the any terminal; communicating with the any terminal through the auxiliary terminal. The present disclosure enables accurately to determine the terminal assisted in communication. Wasting communication sources and blind assistance are avoided. And higher channel quality of the terminal between the terminal and the base station and higher data transmission rate can be ensured.

The present invention relates to a wireless communication system, and a method for determining a resource for device-to-device communication by a user equipment is disclosed. A method for determining a resource for device-to-device communication according to an embodiment of the present invention may comprise the steps of: receiving, from an eNode B (eNB), configuration information related to a resource pool configured for each level; selecting the resource pool of the device-to-device communication on the basis of the configuration information; and selecting a resource for the device-to-device communication in the resource pool. Herein, the resource pool may be configured to have two or more levels.

A method and a radio network node for scheduling wireless devices. The node assigns, to each wireless device, a D2D pair out of the D2D pairs based on spatial compatibilities for each of the D2D pairs with respect to each wireless device. The node estimates, for each wireless device and the assigned D2D pair, a first respective throughput for cellular communication and D2D communication, and estimates, for each wireless device, a second respective throughput for only cellular communication. The node schedules one or more of the wireless devices of the cellular network based on the first and second respective throughputs. Each of the wireless devices is scheduled for cellular communication together with the D2D communication of the assigned D2D pair when the first respective throughput exceeds the second respective throughput, or for only cellular communication when the first respective throughput is below the second respective throughput.

A method, in a network node, for managing a wireless device is disclosed. The method comprises conducting spectrum opportunity detection within a spectrum band and indicating a result of the spectrum opportunity detection to the wireless device. For the purposes of the method, a spectrum opportunity comprises a channel within the spectrum band which is at least temporarily available for use by the wireless device. Also disclosed is a method in a wireless device in a network. The method comprises detecting an indication of a result of spectrum opportunity detection conducted by a network node within a spectrum band and if the indication indicates a detected spectrum opportunity, conducting one of a transmission or reception operation on the detected spectrum opportunity. Also disclosed are a computer program product for carrying out the above methods, a network node and a wireless device.

According to an aspect of the present invention, a device for communication according to a specific communication protocol is provided. The communication device includes a processor for generating and processing frames based on frame formats defined by the communication protocol. The processor generates a beacon frame so that information on a collision avoidance scheme supported by the device of a plurality kinds of information specified based on the communication protocol is omitted. Further, the processor processes a connection request frame transmitted from other device to extract information on a collision avoidance scheme supported by the other device, and controls communication with the other device based on comparison of the extracted information on the collision avoidance scheme with the information on the collision avoidance scheme supported by the device.

According to one embodiment, a wireless communication device includes: a receiver that configured to receives a first frame; and a transmitter that configured to transmits a second frame including a first identifier and acknowledgement information on the first frame, the first identifier being extracted from a predetermined field of the first frame and being different from a source address of the first frame.

A method includes: monitoring a plurality of wireless working frequency bands supported by a smart terminal; when a Peer to Peer (P2P) data packet is received at any of the wireless working frequency bands, analyzing the P2P data packet and obtaining device information of a smart device; and establishing a wireless connection with the smart device at the wireless working frequency band according to the device information.

Technologies for streaming device role reversal include a source computing device and a destination computing device coupled via a communication channel. The source computing device and destination computing device are each configured to support role reversal. In other words, the source computing device and the destination computing device are each capable of switching between receiving and transmitting digital media content over the established communication channel. The source computing device is configured to initiate the role reversal, pause transmit functionality of the source computing device, and enable receive functionality of the source computing device. The destination computing device is configured to receive a role reversal indication from the source computing device, locally process the content, transmit a content stream to the source computing device, and display the content stream on an output device of the source computing device. Other embodiments are described and claimed herein.

Provided are a device-to-device (D2D) operation method carried out by a terminal in an RRC connection state in a wireless communication system, and a terminal using the method. The method is characterized by: determining whether a radio resource control (RRC) connection establishment process is problematic; and transmitting a D2D signal using an exception resource, when the RRC connection establishment process is determined to be problematic.

A master user equipment (UE) device may coordinate device-to-device (D2D) communications amongst a plurality of UE devices. For example, a UE device, which has been designated as a master UE device, may coordinate a D2D communication between a first UE device and a second UE device. The master UE device may be a UE device that obtains an indication that it is a master UE device that is to coordinate D2D communications amongst the plurality of UE devices. In some embodiments, the coordinating the D2D communication may be on behalf of a network and/or to facilitate wireless communication between the network and at least one of the plurality of UE devices.

Provided are a device-to-device (D2D) operation method carried out by a terminal in an RRC connection state in a wireless communication system, and a terminal using the method. The method is characterized by: determining whether a communication link with a base station is problematic; and transmitting a D2D signal using an exception resource, when the communication link with the base station is determined to be problematic.

A method in a network node comprises determining (610) whether at least a first D2D capable UE is or will be performing a D2D operation, and determining whether the at least the first D2D capable UE is or will be performing cellular operation. The method comprises adapting (620) activity and/or inactivity state configurations for the at least the first D2D UE based on the determining.

In a paper or board machine drying line after the wire section, during dewatering a web's (W) width is affected in a direction crosswise to the web's traveling direction. Starting from an edge, at least one device (20A, 20B) brings about a force effect of a desired magnitude which is directed all the way to a desired arbitrary crosswise web position in order to modify web characteristics. A device in a paper or board machine line after the wire section has means for processing the web and for dewatering. The paper or board machine line after the wire section further has at least one device (20A; 20B) for directing a force effect at a desired partial area (WS) of the web (W) in the cross machine direction in order to modify the web's characteristics profile in the cross machine direction.

A device for stretching webs of material transversely to a travel direction thereof, includes at least one rotary stretcher extending transversely to the travel direction of the web of material. The stretcher is composed of at least two round tubes which are aligned axially with each other and are supported by ball-and-socket joints on links. The links are mounted adjustably on a base frame.

A device for preventing jamming of a fibrous material subject to a compressive treatment in a stuffing chamber defined by a feed roll and a retard roll. The device includes an impact blade and a stabilizing apparatus. The impact blade is rigid and interchangeable. The stabilizing apparatus stabilizes the impact blade against moving away from the feed roll to prevent the jamming of the fibrous material between the feed roll and the impact blade during the compressive treatment of the fibrous material.

A method for identifying vulnerable system call pairs is disclosed. The method is based on a model for identifying Time-Of-Check-To-Time-Of-Use (TOCTTOU) problem (called STEM), which enumerates the potential file system call pairs (called exploitable TOCTTOU pairs) that form the check/use steps. The system function calls are classified into a plurality of predefined classes and pairs of the function calls are formed according to predefined criteria, where the function calls within a pair are associated with the same file invariant.

The invention relates to an artificial turf, comprising a backing and a number of artificial grass blades connected to the backing and extending transversely of the surface thereof, which artificial grass blades have an irregular, in particular a locally narrowed, cross-section. Owing to this locally narrowed cross-section in the vicinity of the free end thereof, these artificial grass blades greatly resemble natural blades of grass and also display similar behavior. The invention also relates to a method for forming such an artificial turf and to a device with which this method can be performed. The narrowed cross-section can herein be formed by stretching the artificial grass blades, wherein the artificial grass blades can be plasticized before, during and/or after the stretching, for instance by local heating thereof.

A device and method for measuring the thickness of a cloth when the predetermined pressing force is applied to the cloth. A device for measuring a cloth thickness includes a stationary part having a base surface; a movable member having a pressing end to press a cloth against the base surface; a movable member driving mechanism to move the movable member linearly without rotating around itself from an initial position up to an over-pressing position where the pressing end presses the cloth against the base surface with a force exceeding the predetermined pressing force; a load cell for detecting a force with which the pressing end presses the cloth against the base surface; and a pulse coder for detecting the space between the base surface and the pressing end when a force value detected by the load cell reaches the predetermined pressing force.

A thread removal tool for getting rid of loose thread pieces, thread ends, etc. from textiles, fabric, cloth and the like, for example, after ripping open a previously produced seam, contains a thread removal head (3). The thread removal head can be located at one end of a shaft or a handle part (1) and is configured to take hold of loose thread pieces or thread fragments, without itself becoming attached to an underlying textile item, a piece of cloth or the like. The thread removal head can have an uneven surface, e.g., contain bumps (5), to grasp loose thread pieces and thread fragments. Furthermore, or alternatively, it can be made of or have a surface layer made of a material which has a certain sticking or fastening action on such loose thread pieces and thread fragments.

A portable apparatus is removably and communicatively connectable to a network device to communicate authentication or authorization credentials of a user in connection with the user logging into or entering into a transaction with a network site. The apparatus includes a communications port to connect and disconnect the apparatus to and from the network device and to establish a communication link with the network device when connected thereto. A processor receives a secure message from the network security server via the port. The message has a PIN for authenticating the user to the network site, and is readable only by the apparatus. The processor either transfers, via the port, the received PIN to an application associated with the network site that is executing on the network device or causes the apparatus to display the received PIN for manual transfer to the application associated with the network site.

An exercise device (20) includes a frame (22) and a drive mechanism (100) attached to the frame. The drive mechanism includes a first shaft (122) having a first fixed gear (128) and a second shaft (124) having a second fixed gear (130). The first fixed gear and the second fixed gear are mechanically linked to cause the first shaft to rotate in an opposite direction than the second shaft. A first linear input is mechanically linked to the first shaft and a second linear input is mechanically linked to the second shaft.

The arrangement of driven gears on a countershaft in a main speed change mechanism is shortened in an axial direction, whereby the main speed change mechanism can be made compact in the axial direction. Driven gears on a countershaft of a main speed change mechanism are successively arranged from front to rear in descending order of speed. A sub-low-speed drive gear for a sub-speed change mechanism is provided in front of the highest-speed driven gear on the countershaft, and the next-highest-speed driven gear serves as a sub-high-speed drive gear for the sub-speed change mechanism. A sub-low-speed driven gear and a sub-high-speed driven gear for the sub-speed change mechanism are provided on an output shaft to be engaged with the sub-low-speed drive gear and the next-highest-speed driven gear, respectively, and the highest-speed driven gear, the sub-low-speed drive gear, and the next-highest-speed driven gear are caused to overlap in a fore-and-aft direction.

A control device for a dual clutch transmission includes a transmission control unit that determines immobility in an engaging-side clutch in a next stage as sticking and, when the engaging-side clutch in the next stage malfunctions and when a gear in a previous stage is out of engagement, engages the gear in the previous stage and thereafter controls a clutch torque capacity in the previous stage to a predetermined value, and a back torque limiter operates according to a predetermined condition to engage a release-side clutch in the previous stage.

A bevel gear drive (1) comprises a spur bevel gear (2) and a pinion which both mesh with one another. The spur bevel gear and the pinion are arranged within a housing (3). An abutment plate (4) is provided so as to avoid displacement of the spur bevel gear (2), under high operating loads. The abutment plate (4) is integrated in the housing (3) and supports the spur bevel gear (2) when forces, that can cause displacement of the spur bevel gear (2), act upon the spur bevel gear (2).

In a shift lever device, a first engagement portion or a second engagement portion of a shift lever is inserted into a first stopping hole or a second stopping hole of a strength gate when the shift lever is turned along a manual transmission hole, thereby stopping the shift lever from turning towards an automatic transmission hole side. In the shift lever, the first engagement portion and the second engagement portion are disposed at the vehicle front side and the vehicle rear side of a support body. An increase in size of the shift lever in the vehicle left-right direction due to the first engagement portion and the second engagement portion can accordingly be suppressed, and the turning rage of the shift lever in the vehicle left-right direction can be made smaller, thereby enabling a reduction in size of the shift lever device in the vehicle left-right direction.

A steering device is provided that is capable of facilitating an assembly operation, decreasing the number of parts, and decreasing manufacturing costs. A bottom plate of a stopper is tightened to an outer curved surface of an inner column between a head section and a bulged section of a rivet body. An outside diameter of the rivet body increases to eliminate a gap between a first through-hole and a second through-hole. The stopper remains stationary even when it touches a long hole at a telescopic stroke end and repeatedly receives an impact force. The durability of the stopper improves. There is no need for a nut for fixing the stopper to the inner column. The number of parts decreases to reduce manufacturing costs.

A device for preventing an inward shifting of a brake pedal during a collision. The device includes a mounting bracket. A pedal housing is combined with the mounting bracket such that the pedal housing is movable in a rearwards direction from the mounting bracket. A pedal arm is hinge-coupled at upper and middle parts thereof with the pedal housing and a push rod, respectively. A unit for preventing the inward shifting of the pedal arm has a separating plate which, as the pedal housing is moved rearwards, presses against a fixing pin to decouple the fixing pin from the pedal arm, enabling the pedal arm to turn outwards about a hinge point at the middle part.

A vehicle transmission includes at least one rotatable component and is disposed in an environment at a first pressure. A transmission housing includes a sump portion disposed near a bottom portion of the transmission housing, where the transmission housing substantially encloses the at least one rotatable component. A hydraulic fluid is disposed at least partially in the sump portion of the transmission housing and a vacuum source is in pneumatic communication with the transmission housing. The vacuum source at least partially evacuates a gas from the transmission housing so that an interior of the transmission housing is at a second pressure. The at least one rotatable component is partially exposed to a gas at the second pressure and partially submerged in the hydraulic fluid when the transmission is under a predetermined dynamic load.

A cam and lever system comprising a cam having a side perpendicular to an axis of rotation of the cam and a channel on the side of the cam, the channel having a bottom wherein the channel is at least partially defined by a first wall and a second wall that diverge as the distance from the bottom increases, a lever, having a pin extending into the channel and an axis of rotation that is generally parallel to the axis of rotation of the cam, and having a configuration sufficient to provide point contact with the walls of the channel.

An automatic shift device for an automated transmission for a vehicle includes a rotation shaft, a clutch ring, a clutch hub, a sleeve, a dog clutch portion, a shaft moving apparatus, and a control portion. The control portion includes a push force reduction control portion performing a push force reduction control reducing a push force of the sleeve that the shaft moving apparatus applies on the clutch rear teeth in response to a back and forth movement of the sleeve after the sleeve reaches an end surface of the clutch rear tooth. The control portion includes a retry control portion performing a retry control that re-applies the push force of the sleeve in response to a predetermined retry condition after the push force reduction control is performed.

An adjusting device is equipped with a rod and a holder disposed movably in the direction of the length of the rod at an end of the rod, and adjusts the allowance length of the inner cable coupled to the rod and (or) holder. The adjusting device is provided with a lock-discriminating member protruding from the periphery of the holder and a cover covering the periphery of the holder including the lock-discriminating member and the lock. The lock piece does not protrude from the periphery of the holder in the lock state and protrudes to the same height with the lock-discriminating member in the unlock state.

An accelerator pedal is supported by a support member. A biasing member biases the accelerator pedal to the full close position. A resistance application unit increases a frictional force to increase a rotational resistance applied to the accelerator pedal, as a rotation angle of the accelerator pedal increases. A slidable portion is mounted to the support member and slidable on the accelerator pedal. A first latch portion and a second latch portion define an interspace therebetween in a rotational direction. The support member includes a rotation restrictive projection fitted between the first latch portion and the second latch portion.

Centrifugal pendulum device including pendulum masses arranged on axial sides of a pendulum mass support rotatable about an axis of rotation to form a pendulum mass pair. To form the mass pair, the masses are fastened to each other by means of a fastener passing through a cutout in the mass support. The mass pair is pivotable relative to the mass support due to a rolling element arranged to roll in a recess of the mass support and of the mass. In a section axially covering the recess of the mass support, the rolling element has a first outer diameter. In a section axially covering the recess of the pendulum mass, the rolling element has a second outer diameter. The rolling element further comprises a section axially located between the first and second diameters and has a third diameter, which is smaller than or equal to the first outer diameter.

An electronic device is provided with an inclination sensor for computing inclination, a control unit which conducts predetermined control based on a value computed by the inclination sensor, a case which has the inclination sensor and the control unit therein, and a suspension portion for suspending the case, and the control unit controls correction of the reference value of the inclination sensor based on a state where the case is suspended by the suspension portion and still.

A portable articulated arm coordinate measurement machine can include a base, a manually positionable articulated arm portion having opposed first and second ends, the arm portion including a plurality of connected arm segments, an electronic circuit that receives the position signals from the transducers, a first inclinometer coupled to the base, wherein the inclinometer is configured to produce a first electrical signal responsive to an angle of tilt of the base and an electrical system configured to record a first reading of the first inclinometer and a second reading of the first inclinometer, wherein the first reading is in response to at least one of a first force applied to the base and a third force applied to the mounting structure, wherein the second reading is in response to at least one of a second force applied to the base and a fourth force applied to the mounting structure.

A multi-panel electronic device and method are disclosed. In a particular embodiment, a method includes receiving first acceleration data from a first sensor coupled to a first portion of an electronic device. The method further includes receiving second acceleration data from a second sensor coupled to a second portion of the electronic device, where a position of the first portion is movable with respect to a position of the second portion. The method further includes determining a configuration of the electronic device at least partially based on the first acceleration data and the second acceleration data.

The six direction directing device includes a shaft, a rotation member, a driving source, and a guide member. The shaft extends in an X axis direction. The rotation member is rotatable around an inclined axis inclined at α deg with respect to the shaft. The rotation member has an xyz rectangular coordinate system. The rotation member further includes a spherical surface and an orbit portion formed around an x axis of the spherical surface. The guide member is fixed to an XYZ rectangular coordinate system. The orbit portion has such a shape that the y axis of the rotation member is sequentially directed in + and − directions on the U, V, and W axes that cross one another at intervals of 60 deg around the X axis when the rotation member is rotated in contact with the guide member by the rotation of the shaft.

A protractor for use with an external fixation frame is provided. The protractor may include a face having angle designations thereon and a set of opposed and extending flanges projecting from said face. The flanges may connect to a portion of an external fixation frame, such as a ring (or other component) of the frame. The face may also include a post member to which a rotatable dial is mounted. An elongate member may be pivotally connected to a portion of the post member and may include a clamp. The clamp may be used to connect to an alternate portion of an external fixation frame, such as a strut of the frame. Thus, the protractor may be connected to two points on an external fixation frame so as to measure the angle between such points. Related methods of using the aforementioned protractor are also disclosed.

A method of indicating an interference magnetic field at an electronic device includes: displaying a first arrow indicating a direction of magnetic north on a display of the electronic device, the direction of the first arrow corrected to remove interference caused by an interference magnetic field; and displaying a second arrow indicating a direction of a source of the interference magnetic field on a display of the electronic device.

A bubble type level for determining the orientation of a structure that includes a plurality of differently oriented bubble vials that are secured within the level body in a manner such that, if any one of the bubble vials become broken or otherwise damaged, it can be easily replaced and the level need not be discarded. The bubble type level of the invention also includes a novel connector mechanism that enables the level to be removably interconnected with the structure to be leveled. The level further includes a plurality of longitudinally spaced magnets that are connected to the bottom surface of the level and a bulls-eye level that is mounted on the top surface of the level body.