Abstract: A method of reducing power consumption of a radio badge in a boundary detection localization system is disclosed, in which the radio badge is carried by a tracked target and performs location sampling communication with an infrastructure component of the localization system at the start and end of sampling time intervals such that positions of the radio badge can be estimated. The method includes: determining a velocity of the radio badge; estimating a critical time for the radio badge to reach a critical region through division in which a critical distance from an estimated position obtained at the end of a most recent sampling time interval to the critical region is the dividend, and the velocity of the radio badge is the divisor; and controlling the radio badge to perform location sampling communication with the infrastructure component of the localization system at the end of the critical time.

Abstract: A power-saving wireless input device and an associated system are included. The wireless input device comprises an antenna, an RFID transponder, an energy-storing unit, and a sensing unit. The RFID transponder receives an AC signal via the antenna, and converts the AC signal into a DC signal. The energy-storing unit receives the DC signal for charging. The sensing unit, which is powered by the energy-storing unit, generates an input signal to the RFID transponder. The RFID transponder demodulates the AC signal to generate a request signal, and performs load modulation according to the input signal to generate a reply signal in response to the request signal. The reply signal is then transmitted via the antenna.

Abstract: The present disclosure provides a power rectifier for a Radio Frequency Identification tag circuit. The rectifier is constructed from a pair of complementary MOS transistors. Gates of the transistors have predetermined voltages applied to them. The applied voltages bias the transistors to near their active operating region. During the same time additional control signals are applied to the gates of the transistors, the control signals are synchronous, but out of phase, with each other.

Abstract: An RFID reader control system and method is provided. A protocol for controlling an RFID reader and an RFID reader control unit of a mobile phone is defined. Messages, information, commands, responses, and notification are constructed and transmitted between the RFID reader and the RFID reader control unit.

Abstract: A method for using electronic product identification devices to track the purchase or theft of any multiple merchandise items in a food store or other retail shopping store environment, to determine if a large quantity of items are in the process of being stolen, to activate an alarm condition in a surveillance camera system, alert store security, and send tag information (list of stolen contents thereof) and a video clip file or URL of a web site link to view a video file to store security using remote mobile devices, and to law enforcement if desired.

Abstract: An apparatus and method are provided for monitoring, remotely, information relating to the motion of at least one moving object. The apparatus comprises: means for illuminating a retro-reflective data carrier mounted on each moving object, in particular when the moving object is located at a predetermined monitoring position; means for detecting, in optical signals returned by the retro-reflective data carrier, data representing a timing trigger and data representing an identifier for the at least one moving object; timer means responsive to a timing trigger detected at the predetermined monitoring position to trigger a timer associated with a detected identifier; and an output to provide timing information associated with the detected identifier, and hence relating to the at least one moving object at the predetermined monitoring position. The timing information may be used to derive relative ordering, relative timing or speeds of moving objects, for example.

Abstract: Methods (3500-3695) and apparatus (10, 20) for controlling physical (30, 40) and virtual (12) access for accelerated recognition and processing of privileges, benefits, value transfers, crowd control, community membership and status, in particular for institutions, arenas and other large venues.

Abstract: An RFID or NFC reader is associated via a data link with a tag module such that when the reader transmits an interrogation signal the tag module responds with a random, or constrained random, information signal. The information signal masks a signal transmitted by an RFID or NFC tag which the reader is interrogating, making fraudulently obtaining details contained in the tag transmission more difficult.

Abstract: A method and system are disclosed for providing electronic parking validations. The method and system involve providing a parking ticket with a unique identifier to a patron upon arrival to a parking facility, where the unique identifier is associated with parking information. The method and system further involve using a web-based electronic parking validation system to confirm the parking ticket parking information with electronically stored parking information and to provide an electronic parking validation for the parking ticket. In order to confirm the parking ticket information with the electronically stored parking information and to provide an electronic parking validation for the parking ticket, a validator inputs into the web-based electronic parking validation system the unique identifier that is associated with the parking ticket. In some embodiments, the validator uses an electronic bar code scanner to scan electronically the unique identifier into the system.

Abstract: A RFID cabinet comprises a cabinet structure and one or more drawers or shelves. Chambers are formed within the cabinet to house the one or more drawers or shelves. An RFID scanner is configured to scan items tagged with RFID tags in the chambers via one or more antennas. The antennas can include transmit and receive antennas or antennas configured to perform both transmit and receive functions. The drawers can have a access cover, or lid that can be controlled so as to control access to the drawer. The scanner can be configured to perform inventory control for the tagged items.

Abstract: Methods and apparatus, including computer program products, for RFID-based personnel tracking. A method of tracking employees includes, in a first computer system, prompting a user for identification input, validating the identification input, receiving data from a first scan of a Radio Frequency Identification (RFID) tag upon initiation of a task, receiving data from a second scan of the RFID tag upon termination of the task, and uploading the identification input and the data of the first and second scans to a second computer system for storage and correlation.

Abstract: Remote communication devices, radio frequency identification devices, wireless communication systems, wireless communication methods, radio frequency identification device communication methods, and methods of forming a remote intelligent communication device are provided. According to one aspect, a remote intelligent communication device includes communication circuitry configured to at least one of receive communication signals and generate communication signals; and an antenna coupled with the communication circuitry and substantially tuned to a plurality of frequencies, the antenna being configured to communicate wireless signals corresponding to the communication signals including at least one of receiving wireless signals and outputting wireless signals.

Abstract: Product availability can be determined using radio frequency identification (RFID) by determining whether a RFID tag is detectable by a RFID reader and setting a product availability condition, where the RFID tag is not attached to the product, and where distance between the RFID tag and the RFID reader changes as quantity of the product changes. A system for determining availability of products using RFID can comprise a product display unit, a RFID reader, a RFID tag associated with the product display unit, and a computing device configured to set product availability conditions. In the system, distance between the RFID tag and the RFID reader changes as quantity of the product changes.

Abstract: There is provided a method of recording an image by causing a subject to truly coincide with data relating to the subject. In a finished work recording method using image data by obtaining a product to be recorded and work contents to the product to be recorded as a work recording image, RFID tags 60 (RFID tags 60a, 60b) in each of which inherent tag data is recorded are attached to the product to be recorded and to the work recording worker. Thereafter, whether the tag data are true to the image data of a subject to be worked is determined by comparing a time difference between the time at which the tag data recorded in the RFID tag 60a is read and the time at which the image data of the product to be recorded is obtained with a preset specified time. When it is determined that the tag data are truly associated with the image data, the image data associated with the tag data is recorded as a finished work.

Abstract: An air compressor 1 is provided with a clocking mechanism and an RFID reader/writer 2, detects a time-in and a time-out etc. of a worker, and writes time data into an RFID tag 4 of a time card 3 held by a worker using the RFID reader/writer 2. The air compressor 1 is made to function as a time recorder in order to collect data necessary for management from the time card 3 of the worker. Also, a type of tool etc. used during works is written to the RFID tag 4 of the time card 3 using the RFID reader/writer. In this way, the air compressor 1 is made to function as a data collection terminal to collect data necessary for work management from the time card 3 of the worker.

Abstract: The invention provides a tag identification system, a tag reading apparatus, and a method for determining sequence of tags. According to an aspect of the invention, a tag identification system comprises a tag reading apparatus and a plurality of tags, wherein: the tag reading apparatus has at least two antennas, wherein the apparatus transmits an interrogation signal within the coverage of each of the antennas; the plurality of tags sequentially pass by the coverage of each of the at least two antennas, each of the plurality of tags returning a reply to the at least two antennas in response to a received interrogation signal; and the tag reading apparatus includes a sequence determination unit which determines the sequence in which the plurality of tags pass by based on replies returned from the plurality of tags and received by the at least two antennas.

Abstract: The present disclosure relates to a system and method for using a mobile device for vending payments. The system is provided with one or more processors configured to receive input and create a vending account; communicate vending transaction details with the mobile device; charge the vending account based upon the vending transaction details; communicate a code authorizing the vending transaction to the mobile device; and transfer funds to a vendor related to the vending transaction.

Abstract: An assembly has a tachograph and a data memory, in particular a data memory of a data card. The tachograph has an interface designed to exchange data between the tachograph and the data memory, logic function modules and at least one memory. In a method for operating the tachograph, as a result of high security requirements, the data transfer between the data memory and the tachograph is extremely time-intensive. At the start of the data transfer a virtual reproduction of the data memory is created in the memory of the tachograph and the logic function modules first have read and write access to the virtual reproduction in the memory. Data is then regularly written to the data memory of the data card by a write access to the memory, thus eliminating the differences between the virtual reproduction and the data memory.

Abstract: A system and a method for accessing an electronic program guide (EPG) and media content from multiple locations using mobile devices. The media content is available from a content provider via a first network. The system and the method have a first terminal that may be located in a first location or in a second location. The terminal displays, accesses and/or connects to EPG for identifying and/or for accessing the media content. The first location or the second location of the first terminal is identified and/or is determined by the EPG and/or a second terminal in communication with the first terminal and/or the EPG. The first terminal accesses the EPG to identify a first list of media content or a second list of media content which may be consumed by the first terminal in the first location or the second location, respectively. The media content is restricted and/or is supplemented based on the first location or the second location of the first terminal.

Abstract: Systems and methods for processing, for example, childcare benefits include: issuing a benefit card to a childcare customer; receiving a start time for childcare service at a childcare provider, the start time recorded by using the benefit card at a terminal located at the childcare provider at the start of childcare service; receiving an end time for childcare service at the childcare provider, the end time recorded by using the benefit card at a terminal located at the childcare provider at the end of childcare service; computing the childcare benefit eligibility based on the start time, the end time and benefits available for the childcare customer; and paying the childcare provider a payment based on the computed benefit eligibility.

Abstract: A system of equipment, communication networks, and computer programs automates the recording of worker identity, location, arrival time and departure time at multiple worksites of workers in a mobile field workforce. The equipment comprise a location identifying means, an operator identifying monitor, and a data processing means having connectivity to a data communicating means such as the Internet. The location identifying means may comprise an optically sensed label, magnetic striped card, a radio frequency interrogated tag, or an electrically connectable circuit. The monitor comprises a means to keep time, to scan, interrogate, or connect and communicate with the location identifying means, and to communicate time, location, and operator identifying data over a network such as the public switched telephone network, internet, or cellular telephone network.

Abstract: In various embodiments, an application may automatically track the amount of time a user spends performing activities on one or more computer applications. The tracked time may be used, for example, to bill a client for the activities performed. To automatically track time for a user, a time tracking application may monitor a user's activities and store time tracking entries with the types of activities performed and the time spent performing the activities. These activity types may be correlated against billing codes.

Abstract: Methods and apparatuses for manufacturer to present Web-based edu-games so as to train retail staff member about the manufacturer and its products and to access edu-game data and retail sales data from a database. A Website can be created to provide a point of interaction between the manufacturer, retailer, and retail staff member. By accessing this Website, the retail staff member is presented with the web-based edu-games and learns about the manufacturer and its products. The retail staff member can be presented with incentives by the manufacturer for completing the web-based training off time, which may prevent the retailer from paying for the costs of training the retail staff member. Alternately, retailers can also do training in-house (e.g., if required by statute). Manufacturers and retailers compare education levels to sales data to determine the effects of the training.

Abstract: A work management data collection system 1 is provided with a data collection mechanism in a tool 2, and by counting a number of times a work operation has been executed or the like, obtains a work data identifying the work task that has been executed and detects a time data required for the work task. The system is provided with an RFID tag 3a on an ID card 3 held by a worker, and by writing data into the ID card 3 of the worker who carried out the work task, using an RFID reader/writer 4 provided on the tool 2, the system obtains data necessary for the work management from the ID card 3 of the worker.

Abstract: A time and/or attendance system is provided which includes a service location. The service location has a server with a first periodically changing random code that is correlated with actual time. A device displaying a second periodically changing random code is located at a selected location. The second periodically changing random code has the same sequence as the first periodically changing random code but the code being displayed on the device is offset in time from the first periodically changing random code. An employee who is expected to provide services at the selected location notes the second periodically changing random code at the beginning of an event at the selected location. Thereafter, the employee notes the second periodically changing random code at the end of the event at the selected location. After leaving the selected location, the employee communicates both the beginning code and the ending code to the service location.

Abstract: A system and method for detecting transaction anomalies and information reflecting potential fraudulent activities is disclosed. Data is collected from transactions carried out in a number of business applications such as computer systems, telecommunication systems and security systems. This transaction data is normalized to generate transaction data having consistent format for analysis and/or comparison. User profiles are generated by sorting the normalized data by user and identifying particular user characteristics from the sorted data. Each user profile therefore reflects the behavior of the user as it relates to the business applications. The user profiles and/or predetermined rules are then used to detect anomalies in incoming transactions.

Abstract: A method of projecting cash flow is disclosed which may include the steps of displaying a position date at which a cash flow position is to be calculated, displaying a beginning cash balance total amount as of the position date, displaying a forecast sales total amount as of the position date, displaying an accounts receivable total amount as of the position date, displaying an accounts payable total amount as of the position date, displaying a projected expense total amount as of the position date and displaying a resulting cash flow position as of the position date. The method may allow the user to edit the amount of at least one of the displayed beginning cash total balance, forecast sales total amount, account receivable total amount, accounts payable total amount and projected expense total amount along with the position date and the method may calculate and display a new cash flow position based on at least one of the edited amounts and edited position date.

Abstract: Surgical sponges and other articles are provided with machine-readable information which provides a serial number or other unique identification of the sponge. In addition, the machine-readable information will provide the type of article and/or a characteristic visual motif associated with the article. That way, by scanning in the machine-readable information from the sponges or other articles prior to a procedure, the computer or other digital processor can determine which articles may be missing after the procedure and alert the surgical team as to the type and/or characteristic visual motif of the missing article.

Abstract: An economical prescription order tracking system automatically monitors and tracks hand-carried prescription orders through a pharmacy. The system includes a tracking tag having a unique identifier associated with it secured near the prescription order such that it travels with the order through various locations within the pharmacy. Tag reading devices are positioned at key locations throughout the pharmacy to detect the location of each tag, and its associated attached prescription order. The detected locations are compiled via a computer system and associated with the customer, such that at any given time the location of the prescription order within the pharmacy can be determined, thereby facilitating the efficient operation of the pharmacy. The time each prescription order remains at each location and worker identity information at each location can be recorded and compiled to facilitate workflow and worker efficiency monitoring of the pharmacy.

Abstract: Methods and apparatus are disclosed for providing a bonus award to a gaming player for using a player tracking account associated with a gaming establishment. Provision of a bonus award is based on the access to a player tracking account. Specifically, once a gaming system detects that a gaming player has accessed a player tracking account associated with the gaming establishment, the gaming system can determine whether the player accessed the player tracking account in a manner meeting one or more bonus award criteria. For instance, the bonus award criteria can include accessing a player tracking account within a limited period of time allotted for awarding the bonus award, accessing a player tracking account according to a specified sequence with respect to accesses by other gaming players, or some other criterion.

Abstract: Provided is a method and system for measuring traffic quality in distribution using test mail into which a radio frequency identity tag is inserted. The system accepts at least one test distribution piece including a tag, and collects information of test distribution by sensing a tag included with the test distribution piece at measuring points for measuring a time from acceptance to delivery of a general distribution piece. The system generates a processing rate and a delivery rate of distribution based on information of the test distribution pieces collected from the measuring points.

Abstract: A meeting location availability system determines the meeting locations that are available for use during a specified meeting time and suggests some or all of the available meeting locations as possible locations for conducting a meeting at the specified meeting time. The meeting location availability system maintains meeting location information, such as the preferred meeting locations, for each user. The meeting location availability system may then determine the meeting locations that are available for a meeting between meeting attendees at a specified meeting time by identifying the meeting locations for all of the meeting attendees and, from these meeting locations, identifying the meeting locations that are available for use during the specified meeting time. The meeting location availability system may then suggest some or all of the identified available meeting locations as possible locations for conducting the meeting at the specified meeting time.

Abstract: A system and method for using RFID technology to track resource performance and task completion is disclosed. In one exemplary embodiment, a fob and an RFID reader may engage in mutual authentication. Where the RFID reader and the fob successfully mutually authenticate, the fob may transmit to the RFID reader information identifying the resource's performance tracking account to which the fob is associated. The RFID reader may receive and forward the information to facilitate performance tracking. In one exemplary embodiment, the RFID reader may forward the information to a point of interaction terminal for transaction completion. In another exemplary embodiment, the fob completes tasks via a computer interface. In still another exemplary embodiment, the fob resource and/or a manager may access a resource engine, wherein the resource engine may be used to automatically grade, track, score, and assign resources based on resource skills and skill sets.

Abstract: A method and system for vending products from a defined area, such as a micro-warehouse with a door. The method includes fitting each product with a radio frequency identification tag, positioning the plurality of products in a micro-warehouse, sensing opening and closing of the micro-warehouse door, scanning the plurality of products in the micro-warehouse upon sensing closing of the door to determine the number and type of products in the micro-warehouse, generating a message based on the number and type of products in the micro-warehouse, transmitting the message to a remote processor or server, and maintaining an inventory in the remote processor based on the message. The system is designed to be accessed by authorized individuals possessing some type of code or identifying mechanism. The micro-warehouses may be cabinets, refrigerators, secured rooms, or similar storage units or areas.

Abstract: A time stamp machine includes a reading unit, a recording unit, a comparing unit and a reminding unit. The reading unit reads unique identification codes when the time cards are clocked. The recording unit records the read identification codes and times when the identification codes are read. The comparing unit compares the information recorded by the recording unit with users information, which comprises identification codes and at least one of phone numbers and E-mail addresses stored in a memory connecting with the time stamp machine to find the time cards that have not been clocked between a predetermined schedule when current time reach a pre-set time. The reminding unit transmits reminding information to communication terminals corresponding to the time cards that have not been clocked between the predetermined schedule.

Abstract: The present invention is directed to one or more time and attendance systems specifically designed for use in the gaming (gambling) and hospitality (hotels and restaurants) industries, but may additionally be utilized advantageously in a wide range of other fields or industries. The disclosed time and attendance system can be easily integrated into existing human resource software systems so as to eliminate duplication of employee records and duplication of servers. The disclosed time and attendance system combines a time clock apparatus that allows employees and supervisors to clock in and clock out, view records of their accumulated time, etc., with a behind the clock software system that allows persons with proper authorization to configure the time clock apparatus and to review, approve, disapprove and/or edit employee time clock records in a simple and organized manner.

Abstract: The present invention is directed to one or more time and attendance systems specifically designed for use in the gaming (gambling) and hospitality (hotels and restaurants) industries, but may additionally be utilized advantageously in a wide range of other fields or industries. The disclosed time and attendance system can be easily integrated into existing human resource software systems so as to eliminate duplication of employee records and duplication of servers. The disclosed time and attendance system combines a time clock apparatus that allows employees and supervisors to clock in and clock out, view records of their accumulated time, etc., with a behind the clock software system that allows persons with proper authorization to configure the time clock apparatus and to review, approve, disapprove and/or edit employee time clock records in a simple and organized manner.

Abstract: The embodiments of the present invention disclose a system for obtaining advertising exposure time, which includes: one or more clients, adapted to calculate exposure time of playing an advertisement each time by the client, and send an identity of the advertisement and the exposure time of playing the advertisement each time to an advertising server; the advertising server, adapted to obtain total exposure time of the advertisement according to the identity of the advertisement and the exposure time of playing the advertisement each time sent by the client. The embodiments of the present invention also disclose a method for obtaining advertising exposure time.

Abstract: Systems and methods for facilitating data transactions in time recording systems may include receiving, at a client application from a timekeeper, a timekeeper identification. The received timekeeper identification and a request for time entry data associated with the timekeeper may be communicated to a middle-tier application that accesses at least one database to retrieve the requested time entry data and communicated the retrieved time entry data to the client application. The client application may receive the time entry data and store the received data in at least one local memory accessible by the client application. Upon the generation of a new time entry or the modification of an existing time entry at the client application, the time entry data stored in the at least one local memory may be updated. The updated time entry data may be communicated to the middle-tier application to facilitate updating the at least one database.

Abstract: A time and attendance biometric terminal communicates with a payroll system via general packet radio service (GPRS) protocol. The biometric terminal may be remotely activated and set up by entry of its serial number and an internal activation token, which are both supplied after payment information is first entered and verified. Payroll stubs may be printed at a facsimile machine or at a remote printer by the steps of identifying a person, communicating with a payroll database to obtain payroll information for the identified person, communicating the payroll information for the identified person to the remote printer, and printing the obtained payroll information at the facsimile machine or at the remote printer as a payroll stub.

Abstract: This invention relates to a measurement system for determining the running time that a person need to run over one of a plurality of selectable different out-and-back courses, departing from a common starting point that is the finish point at the same time, wherein different turning points are provided by which the particular out-and-back course to be run is established. The times consumed are detected and evaluated individually.

Abstract: A system and method for using RFID technology to track resource performance and task completion is disclosed. In one exemplary embodiment, a fob and an RFID reader may engage in mutual authentication. Where the RFID reader and the fob successfully mutually authenticate, the fob may transmit to the RFID reader information identifying the resource's performance tracking account to which the fob is associated. The RFID reader may receive and forward the information to facilitate performance tracking. In one exemplary embodiment, the RFID reader may forward the information to a point of interaction terminal for transaction completion. In another exemplary embodiment, the fob completes tasks via a computer interface. In still another exemplary embodiment, the fob resource and/or a manager access a resource engine, wherein the resource engine may be used to automatically grade, track, score, and assign resources based on resource skills and skill sets.

Abstract: A time and attendance device having an integrated USB hub and microcontroller is provided. An automated voice feature is provided that is controlled in response to user parameters. Also provided are a single target area having attention-getting illumination, proximity reader positioning, and transaction status indicators.

Abstract: A digital time clock that may be used in conjunction with a mechanical time clock. The digital time clock is placed on or adjacent to an existing mechanical time clock. A radio frequency identification (RFID) tag is associated with each time card that is distributed to employees. As an employee inserts a time card into the mechanical time clock, the digital time clock detects the proximity of the time card and reads the RFID tag. An RFID identifier is stored along with an indication of the time that the identifier was read. The digital time clock may be kept in a low-power standby state until the time card is detected, at which time the digital time clock enters an operational state. The digital time clock may be transported to a location where payroll is to be performed, and data downloaded to a processing device.

Abstract: Methods and apparatus, including computer program products, for RFID-based personnel tracking. A method of tracking employees includes, in a first computer system, prompting a user for identification input, validating the identification input, receiving data from a first scan of a Radio Frequency Identification (RFID) tag upon initiation of a task, receiving data from a second scan of the RFID tag upon termination of the task, and uploading the identification input and the data of the first and second scans to a second computer system for storage and correlation.

Abstract: A computer implemented method, data processing system, and computer program product that enable a component to prepare for the arrival of a moving component by providing, to the component, an automated notification of the moving component's approach. When a moving component approaches an arrival point, a signal is received from a transponder chip on the moving component, wherein the signal includes a unique identifier for the transponder chip. The moving component is then identified based on the unique identifier in the signal. A second signal is sent to the component to signal that initiation of a set of actions to be performed with respect to the moving component may occur.

Abstract: A method for tracking time attendance for either a single dedicated user, and typically owner, of a single multi-function electronic hand-held device without the need of entering password information, or selectively interchangeable to multiple non-dedicated users which must enter passwords to access their time tracking screens is provided. The time tracking software on the hand-held device can be placed into solo mode for a single dedicated user, which can be selectively deactivated so as to enable multiple non-dedicated users to enter their passwords to log in and clock-in or clock-out. The solo mode may be selectively reactivated so as to automatically log in the dedicated user and display his or her time tracking screen. An authorized administrator's password may be necessary to activate or deactivate solo mode.

Abstract: A method and a mobile terminal where reproduction of a security barcode in a mobile terminal including a special function is prevented. When a security function is executed, a security barcode corresponding to security barcode generation information is generated and the special function is controlled. When the security function is released, the generated security barcode is removed and the control of the special function is released. When the special function is executed, execution information of the special function is stored. When the security function is executed again, the execution information of the special function is added to the security barcode generation information so as to generate new security barcode generation information. A security barcode corresponding to the new security barcode generation information is generated, and the generated security barcode is displayed.

Abstract: An assembly has a tachograph and a data memory, in particular a data memory of a data card. The tachograph has an interface designed to exchange data between the tachograph and the data memory, logic function modules and at least one memory. In a method for operating the tachograph, as a result of high security requirements, the data transfer between the data memory and the tachograph is extremely time-intensive. At the start of the data transfer a virtual reproduction of the data memory is created in the memory of the tachograph and the logic function modules first have read and write access to the virtual reproduction in the memory. Data is then regularly written to the data memory of the data card by a write access to the memory, thus eliminating the differences between the virtual reproduction and the data memory.

Abstract: A digital time clock that may be used in conjunction with a mechanical time clock. The digital time clock is placed on or adjacent to an existing mechanical time clock. A radio frequency identification (RFID) tag is associated with each time card that is distributed to employees. As an employee inserts a time card into the mechanical time clock, the digital time clock detects the proximity of the time card and reads the RFID tag. An RFID identifier is stored along with an indication of the time that the identifier was read. The digital time clock may be kept in a low-power standby state until the time card is detected, at which time the digital time clock enters an operational state. The digital time clock may be transported to a location where payroll is to be performed, and data downloaded to a processing device.