current date and time in php code
Date and Time Manipulation
... only increases when the date interval spans months or years. Date in Days The following script shows one way to make date and time calculations much easier. Because UNIX and Linux calculate time ... routine notices by page during the day and by e-mail at other times. The following script determines whether the current day and hour are within a certain time frame that you set. This code ... 's/0*//'` year= `date +'%Y'` 22 CHAPTER 3 ■ DATE AND TIME MANIPULATION Alternatives for Finding the Date in Seconds There are two other ways to calculate the number of seconds since the epoch....
Ngày tải lên: 05/10/2013, 08:51
CURRENT FRONTIERS AND PERSPECTIVES IN CELL BIOLOGY doc
... as integrins (e.g. endothelial JAM-A with integrin LFA-1 in leukocytes and integrin ανβ3 in endothelial cells; endothelial JAM-B with integrin VLA4 in Current Frontiers and Perspectives in ... present in proteins concentrated in cholesterol rich microdomains and involved in membrane apposition and fusion events. Occludin and tricellulin carboxyl cytoplasmic tales are long and share ... protein-protein interaction. JAMs and LSR do not constitute tight junction strands and instead act as landmarks. Thus while LSR defines cell corners for Current Frontiers and Perspectives in...
Ngày tải lên: 28/03/2014, 10:20
Current Trends and Challenges in RFID Part 1 doc
... Similarly, S 12 and S 22 can be obtained by measuring the incident, the reflected and the transmitted signals at the output when the input is terminated in Z 0 . Since the input is terminated by ... linear, the total voltage at any point in the system is the sum of incident and reflected voltages. The net current is superposition of incident and reflected currents. However, since the currents ... the scattering parameters (or just S-parameters) are employed. The input and output variables in S-parameters are based on incident and reflected voltage waves instead of voltages and currents....
Ngày tải lên: 19/06/2014, 19:20
Current Trends and Challenges in RFID Part 2 pptx
... increased by negative voltage gain between input and output. However, since the input impedance of the cascode device M 2 is capacitive, the voltage gain is high in low frequency and low in ... = v GS - V t , the current becomes independent of v DS . Current Trends and Challenges in RFID 32 a. Both LO and input signals are balanced, providing both LO and input rejection at the ... follower for output matching, but has passive output matching network, which consists of bandpass filter and impedance inverting scheme. Current Trends and Challenges in RFID 34 Fig. 15....
Ngày tải lên: 19/06/2014, 19:20
Current Trends and Challenges in RFID Part 3 docx
... transitory current to flow into Q 1 leading the system to desired operating point. At same time, C START is charged toward V IN reducing the V sg of M START and, consequently, turning it off. ... years, integrated circuits are being fabricated with large densities and endowed with intelligence. The reliability of those systems has been increasing and the costs are lowering. The interaction ... component, and gradually, decrease towards the center. The temperature effects are minimized in a similar way as the stress gradient: by using low linear temperature coefficient, by using minimal lines...
Ngày tải lên: 19/06/2014, 19:20
Current Trends and Challenges in RFID Part 4 pdf
... behaviour uponbiological tissues in a radio-frequency power transfer link for a cortical visual implant. In Proc. IEEE Int. Conf. Engineering in Medicine and Biology. pp. 2499-2502. [32] ... other hand, it is encumbering and not well-suited Current Trends and Challenges in RFID 80 2. Minimum emitter area for matched transistors, otherwise there will be a degradation in the current ... antenna with a single feed for orthogonal dual-band operation and its and (b) VSWR plots (Chen & Wong 1996) Fig. 12. Aperture coupled RMSA with an inclined slot An interesting feature...
Ngày tải lên: 19/06/2014, 19:20
Current Trends and Challenges in RFID Part 5 docx
... still not satisfied after a printing running on the machine shown in the Fig. 6(a), feeding the printed sheets into machine from beginning again for multiple printing can be considered. Fig. ... traditional printing methods including offset printing, screen printing and a hybrid one based on gravure printing and vacuum deposition technology, to demonstrate the possibilities of making low- cost ... charge of three color inks in sequence in a normal printing machine, then the thickness increase can be achieved by putting the same conducting inks on the cylinders in different stages. If...
Ngày tải lên: 19/06/2014, 19:20
Current Trends and Challenges in RFID Part 6 doc
... research in nature and aimed to investigate the process consistency and capability of printing RFID tag antennas via the screening printing process Screening printing using Ag ink with ... and recommendations Substrate is definitely a dominant variable affecting the printability of printing antenna of RFID tags. The results of study can assist the printing industry in determining ... printing, providing significant time and cost savings compared to traditional etching technology. Therefore, there is a great need to investigate the possibility of applying screen printing...
Ngày tải lên: 19/06/2014, 19:20
Current Trends and Challenges in RFID Part 7 ppt
... using a thicker dielectric substrate and also including in the geometry narrow and long strips (lines). C can be reduced by reducing substrate’s relative dielectric permittivity ε r and increasing ... among tags, impacting both the cases line and the border gate. For the cases line both homogeneous cases (consisting of a single product type) and heterogeneous cases (containing products of ... Tablets in Blister X Tablets in a Bottle X Granules in Sachets X Powders in a Bottle X Semi-liquid Cream X X Liquid Syrup X Single injectable solution in syringe X Multiple injectable...
Ngày tải lên: 19/06/2014, 19:20
Current Trends and Challenges in RFID Part 8 doc
... An RFID system may include a plurality of electronic tags on objects, animals, and other things having unique identification information and a reader for reading or writing information from or ... pharmaceutical supply chain has been considered and its criticalities, in terms of kinds of goods to trace and peculiarities of the checkpoints RFID, have been individuated and discussed. The inadequateness ... suffering from the DC-offset phenomenon by using the phase inversion information instead of the amplitude information. In order to High Performance UHF RFID Tags for Item-Level Tracing Systems in...
Ngày tải lên: 19/06/2014, 19:20
Current Trends and Challenges in RFID Part 9 ppt
... p 1 /2π. Consider the opamp in the inverting configuration as in figure 10. Fig. 10. Inverting amplifier Assuming that there is no current into the inverting input, the current law gives (V I ... Perspective 237 maintain the same Q S ) and increase of C A (to maintain the tuning). However, the reader designer should be aware that, as shown by (7), decreasing L A while maintaining the quality ... Steps in deriving the principle of low coupling approximation Current Trends and Challenges in RFID 248 a linear system whose input is the voltage source V T internal to the tag and the...
Ngày tải lên: 19/06/2014, 19:20
Current Trends and Challenges in RFID Part 10 doc
... connection speed and commands for handling communication with tags. Examples of commands are following: - Anti-collision/select (ACS): After broadcasting this command, tags begins transmitting their ... attack time. During an exposure period, an adversary is able to observe and disturb all interactions involving a target tag and a legitimate reader using oracle according ... tags and what they estimate. 2.3.1 H. Vogt’s algorithm In this scheme, they estimate the number of tags using the current frame size and the result of read cycle. And then updates the current...
Ngày tải lên: 19/06/2014, 19:20
Current Trends and Challenges in RFID Part 11 doc
... anti-collision in UHF-RFID-based systems. The following sections introduce CDMA by outlining the advantages over the current used TDMA schemes. After introducing particular problems backscattering RFID ... BFSA-Non-Muting and BFSA-Muting a computing program was developed [appendix C] and equation 6, 7, 9, 10, 11, 14, 15, 16, 17, 18 and 21 in Section 3 are used. The minimum total census delay was increased ... principle is also indicted in Figure 3, showing the RFID reader transmitting a sinusoidal wave over its transmit antenna TX, thus allowing the various transponders in the field to modulate and...
Ngày tải lên: 19/06/2014, 19:20
Current Trends and Challenges in RFID Part 12 pot
... Communications and Networks (ICCCN), 2010 Proceedings of 19th International Conference on, pp. 1 –6. 328 Current Trends and Challenges in RFID Current Trends and Challenges in RFID 348 Taking into ... i.e., downmixing, analog baseband processing and A/D conversion • Find separate data streams (transp onders) by des preading, demodulating and decoding the signals The Receiving system mainly consists ... sampling of independent random variables x i and y i in function of numbers product: multiple sampling of m and n-tags location Assuming that the probability PP exceeds the value 0.95 independently...
Ngày tải lên: 19/06/2014, 19:20
Current Trends and Challenges in RFID Part 13 pot
... received support from the Global COE Program "Creating innovation by the integration of Medicine and Engineering using information and communication" of Yokohama National University. ... delay included in the measured value is reduced step-by-step by repeatedly applying the compensation function. This helps in minimizing the effect on the line-of-sight (LOS) node, resulting in ... preamble. In the case of multiple incoming signals, the time of arrival of the signal taking the longest path is considered to be the reception time. 2.1 Principle of TDOA positioning algorithm In...
Ngày tải lên: 19/06/2014, 19:20
