This document discusses several techniques for improving the performance of clock and data recovery circuits. It describes a multi-level half-rate phase detector that offers a trade-off between linear and bang-bang phase detection, providing multiple quantization levels to better control the voltage-controlled oscillator. It also presents an adaptive loop gain strategy for clock and data recovery circuits that enhances jitter performance. Additionally, it proposes a built-in jitter measurement circuit using calibration techniques to reduce timing resolution variations and improve measurement accuracy.
Boosting the Performance of Nested Spatial Mapping with Unequal Modulation in...Ealwan Lee
Presented at ICTC2018(9th International Conference on Information and Communication Technology Convergence)
Date : Oct 18, 2018
Place : Jeju, Korea
DOI) 10.1109/ICTC.2018.8539461
URL) https://ieeexplore.ieee.org/document/8539461
[ URL of the paper/preprint ]
https://www.researchgate.net/publication/328364760_Boosting_the_Performance_of_Nested_Spatial_Mapping_with_Unequal_Modulation_in_80211n
[ Prior works of Nested Spatial Mapping without Unequal Modulation(UEQM) ]
https://www.slideshare.net/ealwanlee/nested-mimo-lectures-in-2017-seoul
[ List of the articles related with this slide ]
https://www.linkedin.com/pulse/list-articles-nested-spatial-mapping-wlan80211n-ealwan-lee/
Mixed Linearity Improvement Techniques for Ultra-wideband Low Noise Amplifier IJECEIAES
We present the linearization of an ultra-wideband low noise amplifier (UWB-LNA) operating from 2GHz to 11GHz through combining two linearization methods. The used linearization techniques are the combination of post-distortion cancellation and derivative-superposition linearization methods. The linearized UWB-LNA shows an improved linearity (IIP3) of +12dBm, a minimum noise figure (NF ) of 3.6dB, input and output insertion losses (S 11 and S 22 min. ) below -9dB over the entire working bandwidth, midband gain of 6dB at 5.8GHz, and overall circuit power consumption of 24mW supplied from a 1.5V voltage source. Both UWB-LNA and linearized UWB-LNA designs are verified and simulated with ADS2016.01 software using BSIM3v3 TSMC 180nm CMOS model files. In addition, the linearized UWB-LNA performance is compared with other recent state-of-the-art LNAs.
Transmission management in BSS is a feature used in managing the Base Station Subsystem transmission system functions such as supervision, alarms, statistics
and settings. The network element mainly responsible for transmission management in BSS is the Base Station Controller (BSC).
Transmission management functionalities make it possible for the operators to manage the transmission equipment remotely from the BSC or from Nokia
NetAct integrated network management system, which simplifies network maintenance and operation. Supervision functions help minimise the time spent in maintenance, and statistics collection helps the operators analyse and optimise
the use of their transmission equipment. Moreover, new software can be downloaded in a way that does not interfere with the traffic.
Hardware and software requirements BSS transmission network elements
BSS transmission management functionalities Transmission parameters Transmission alarms
Transmission measurements
2.Hardware and software requirements
There are no specific hardware or software requirements for the transmission management functionalities. However, the type of the BTS poses certain
limitations.
The BTS type specific functionalities are listed in the table below.
More details about the functionalities can be found in BSS transmission management functionalities .
Polling list sending with priority is a functionality used in positioning. To ensure accurate positioning calculations, the LMU unit must supply Radio Interface Timing System (RIT) information to the network faster than the normal Q1 polling is able to do. Faster LMU polling is achieved by defining a Q1 polling
priority for each Q1 device, with the LMU having the highest priority. For more information see Location Services .
3.BSS transmission network elements
The base Station Subsystem (BSS) consists of at least one Base Station Controller (BSC) and its Base Transceiver Stations (BTS). The Transcoder Submultiplexer
(TCSM) is also part of the BSS although it is actually located in the MSC site. The three basic configurations (topologies) for transmission between the BSC and
the BTSs are: point-to-point connection
multidrop chain multidrop loop
In point-to-point configuration each BTS is connected directly to the BSC. In the multidrop chain, BTSs form a chain and the first BTS in the network is connected directly to the BSC. In the loop connection, the BTSs form a loop where the first and the last BTS in the loop are connected directly to the BSC via a crossconnecting node. The topology used depends on a number of factors such as the distance between the BSC and the BTS, the number of transceivers (TRXs) used at a particular BTS site and the signalling channel rate between the BSC and the\ BTS. Usually the topology used is a mixture of the three basic topologies. Formore information on the topologies, refer to Nokia BSS Transmission\Configuration .
Boosting the Performance of Nested Spatial Mapping with Unequal Modulation in...Ealwan Lee
Presented at ICTC2018(9th International Conference on Information and Communication Technology Convergence)
Date : Oct 18, 2018
Place : Jeju, Korea
DOI) 10.1109/ICTC.2018.8539461
URL) https://ieeexplore.ieee.org/document/8539461
[ URL of the paper/preprint ]
https://www.researchgate.net/publication/328364760_Boosting_the_Performance_of_Nested_Spatial_Mapping_with_Unequal_Modulation_in_80211n
[ Prior works of Nested Spatial Mapping without Unequal Modulation(UEQM) ]
https://www.slideshare.net/ealwanlee/nested-mimo-lectures-in-2017-seoul
[ List of the articles related with this slide ]
https://www.linkedin.com/pulse/list-articles-nested-spatial-mapping-wlan80211n-ealwan-lee/
Mixed Linearity Improvement Techniques for Ultra-wideband Low Noise Amplifier IJECEIAES
We present the linearization of an ultra-wideband low noise amplifier (UWB-LNA) operating from 2GHz to 11GHz through combining two linearization methods. The used linearization techniques are the combination of post-distortion cancellation and derivative-superposition linearization methods. The linearized UWB-LNA shows an improved linearity (IIP3) of +12dBm, a minimum noise figure (NF ) of 3.6dB, input and output insertion losses (S 11 and S 22 min. ) below -9dB over the entire working bandwidth, midband gain of 6dB at 5.8GHz, and overall circuit power consumption of 24mW supplied from a 1.5V voltage source. Both UWB-LNA and linearized UWB-LNA designs are verified and simulated with ADS2016.01 software using BSIM3v3 TSMC 180nm CMOS model files. In addition, the linearized UWB-LNA performance is compared with other recent state-of-the-art LNAs.
Transmission management in BSS is a feature used in managing the Base Station Subsystem transmission system functions such as supervision, alarms, statistics
and settings. The network element mainly responsible for transmission management in BSS is the Base Station Controller (BSC).
Transmission management functionalities make it possible for the operators to manage the transmission equipment remotely from the BSC or from Nokia
NetAct integrated network management system, which simplifies network maintenance and operation. Supervision functions help minimise the time spent in maintenance, and statistics collection helps the operators analyse and optimise
the use of their transmission equipment. Moreover, new software can be downloaded in a way that does not interfere with the traffic.
Hardware and software requirements BSS transmission network elements
BSS transmission management functionalities Transmission parameters Transmission alarms
Transmission measurements
2.Hardware and software requirements
There are no specific hardware or software requirements for the transmission management functionalities. However, the type of the BTS poses certain
limitations.
The BTS type specific functionalities are listed in the table below.
More details about the functionalities can be found in BSS transmission management functionalities .
Polling list sending with priority is a functionality used in positioning. To ensure accurate positioning calculations, the LMU unit must supply Radio Interface Timing System (RIT) information to the network faster than the normal Q1 polling is able to do. Faster LMU polling is achieved by defining a Q1 polling
priority for each Q1 device, with the LMU having the highest priority. For more information see Location Services .
3.BSS transmission network elements
The base Station Subsystem (BSS) consists of at least one Base Station Controller (BSC) and its Base Transceiver Stations (BTS). The Transcoder Submultiplexer
(TCSM) is also part of the BSS although it is actually located in the MSC site. The three basic configurations (topologies) for transmission between the BSC and
the BTSs are: point-to-point connection
multidrop chain multidrop loop
In point-to-point configuration each BTS is connected directly to the BSC. In the multidrop chain, BTSs form a chain and the first BTS in the network is connected directly to the BSC. In the loop connection, the BTSs form a loop where the first and the last BTS in the loop are connected directly to the BSC via a crossconnecting node. The topology used depends on a number of factors such as the distance between the BSC and the BTS, the number of transceivers (TRXs) used at a particular BTS site and the signalling channel rate between the BSC and the\ BTS. Usually the topology used is a mixture of the three basic topologies. Formore information on the topologies, refer to Nokia BSS Transmission\Configuration .
A high speed low power consumption d flip flop for high speed phase frequency...IAEME Publication
Phase Frequency Detector (PFD) and Frequency divider are indispensable modules of PLL,
which uses D flip-flop as an integral part. This paper focus on design of High-Speed, Low Power
Consumption D Flip-Flop for High Speed Phase Frequency Detector and Frequency divider. The
designed Frequency divider has been used in the divider counter of the phase locked loop. A divide
counter is required in the feedback loop to scales down the frequency of the VCO output signal. The
conventional and proposed D-Flip flop has been designed in UMC 180nm CMOS Technology with
supply voltage 1.8 using CADENCE spectre tool. Virtuoso Analog Design Environment tool of
Cadence have used to design and simulate schematic. This work has been used in the design of 2.4
GHz CMOS PLL targeting Frequency Multiplier application. The proposed D flip flop circuit is
faster than the conventional circuit as it has fast reset operation. The circuit consumes less power as
it prevents short circuit power consumption.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Performance Analysis of Post Compensated Long Haul High Speed Coherent Optica...Yayah Zakaria
This paper addresses the performance analysis of OFDM transmission system based on coherent detection over high speed long haul optical links with high spectral efficiency modulation formats such as Quadrature Amplitude Modulation (QAM) as a mapping method prior to the OFDM multicarrier representation. Post compensation is used to compensate for
phase noise effects. Coherent detection for signal transmitted at bit rate of 40 Gbps is successfully achieved up to distance of 3200km. Performance is analyzed in terms of Symbol Error Rate and Error Vector Magnitude by varying Optical Signal to Noise Ratio (OSNR) and varying the length of the fiber i.e transmission distance. Transmission performance is also observed through constellation diagrams at different transmission distances and
different OSNRs.
A power efficient delta-sigma ADC with series-bilinear switch capacitor volta...TELKOMNIKA JOURNAL
In low-power VLSI design applications non-linearity and harmonics are a major dominant factor which affects the performance of the ADC. To avoid this, the new architecture of voltage-controlled oscillator (VCO) was required to solve the non-linearity issues and harmonic distortion. In this work, a 12-bit, 200MS/s low power delta-sigma analog to digital converter (ADC) VCO based quantizer was designed using switched capacitor technique. The proposed technique uses frequency to current conversion technique as a linearization method to reduce the non-linearity issue. Simulation result show that the proposed 12-bit delta-sigma ADC consumes the power of 2.68 mW and a total area of 0.09 mm² in 90 nm CMOS process.
Extremely Low Power FIR Filter for a Smart Dust Sensor ModuleCSCJournals
Digital filters are common components in many applications today, also in for sensor systems, such as large-scale distributed smart dust sensors. For these applications the power consumption is very critical, it has to be extremely low. With the transistor technology scaling becoming more and more sensitive to e.g. gate leakage, it has become a necessity to find ways to minimize the flow of leakage in current CMOS logic. This paper studies sub-threshold source coupled logic (STSCL) in a 45-nm process. The STSCL can be used instead of traditional CMOS to meet the low power and energy consumption requirements. The STSCL style is in this paper used to design a digital filter, applicable for the audio interface of a smart dust sensor where the sample frequency will be 44.1 kHz. A finite-length impulse response (FIR) filter is used with transposed direct form structure and for the coefficient multiplication five-bit canonic signed digit [7] based serial/parallel multipliers were used. The power consumption is calculated along with the delay in order to present the power delay product (PDP) such that the performance of the sub-threshold logic can be compared with corresponding CMOS implementation. The simulated results shows a significant reduction in energy consumption (in terms of PDP) with the system running at a supply voltage as low as 0.2 V using STSCL.
A high speed low power consumption d flip flop for high speed phase frequency...IAEME Publication
Phase Frequency Detector (PFD) and Frequency divider are indispensable modules of PLL,
which uses D flip-flop as an integral part. This paper focus on design of High-Speed, Low Power
Consumption D Flip-Flop for High Speed Phase Frequency Detector and Frequency divider. The
designed Frequency divider has been used in the divider counter of the phase locked loop. A divide
counter is required in the feedback loop to scales down the frequency of the VCO output signal. The
conventional and proposed D-Flip flop has been designed in UMC 180nm CMOS Technology with
supply voltage 1.8 using CADENCE spectre tool. Virtuoso Analog Design Environment tool of
Cadence have used to design and simulate schematic. This work has been used in the design of 2.4
GHz CMOS PLL targeting Frequency Multiplier application. The proposed D flip flop circuit is
faster than the conventional circuit as it has fast reset operation. The circuit consumes less power as
it prevents short circuit power consumption.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Performance Analysis of Post Compensated Long Haul High Speed Coherent Optica...Yayah Zakaria
This paper addresses the performance analysis of OFDM transmission system based on coherent detection over high speed long haul optical links with high spectral efficiency modulation formats such as Quadrature Amplitude Modulation (QAM) as a mapping method prior to the OFDM multicarrier representation. Post compensation is used to compensate for
phase noise effects. Coherent detection for signal transmitted at bit rate of 40 Gbps is successfully achieved up to distance of 3200km. Performance is analyzed in terms of Symbol Error Rate and Error Vector Magnitude by varying Optical Signal to Noise Ratio (OSNR) and varying the length of the fiber i.e transmission distance. Transmission performance is also observed through constellation diagrams at different transmission distances and
different OSNRs.
A power efficient delta-sigma ADC with series-bilinear switch capacitor volta...TELKOMNIKA JOURNAL
In low-power VLSI design applications non-linearity and harmonics are a major dominant factor which affects the performance of the ADC. To avoid this, the new architecture of voltage-controlled oscillator (VCO) was required to solve the non-linearity issues and harmonic distortion. In this work, a 12-bit, 200MS/s low power delta-sigma analog to digital converter (ADC) VCO based quantizer was designed using switched capacitor technique. The proposed technique uses frequency to current conversion technique as a linearization method to reduce the non-linearity issue. Simulation result show that the proposed 12-bit delta-sigma ADC consumes the power of 2.68 mW and a total area of 0.09 mm² in 90 nm CMOS process.
Extremely Low Power FIR Filter for a Smart Dust Sensor ModuleCSCJournals
Digital filters are common components in many applications today, also in for sensor systems, such as large-scale distributed smart dust sensors. For these applications the power consumption is very critical, it has to be extremely low. With the transistor technology scaling becoming more and more sensitive to e.g. gate leakage, it has become a necessity to find ways to minimize the flow of leakage in current CMOS logic. This paper studies sub-threshold source coupled logic (STSCL) in a 45-nm process. The STSCL can be used instead of traditional CMOS to meet the low power and energy consumption requirements. The STSCL style is in this paper used to design a digital filter, applicable for the audio interface of a smart dust sensor where the sample frequency will be 44.1 kHz. A finite-length impulse response (FIR) filter is used with transposed direct form structure and for the coefficient multiplication five-bit canonic signed digit [7] based serial/parallel multipliers were used. The power consumption is calculated along with the delay in order to present the power delay product (PDP) such that the performance of the sub-threshold logic can be compared with corresponding CMOS implementation. The simulated results shows a significant reduction in energy consumption (in terms of PDP) with the system running at a supply voltage as low as 0.2 V using STSCL.
A 20 gbs injection locked clock and data recovery circuitVLSICS Design
This paper presents a 20 Gb/s injection-locked clock and data recovery (CDR) circuit for burst mode
applications. Utilizing a half rate injection-locked oscillator (ILO) in the proposed CDR circuit leads to
higher speed operation and lower power consumption. In addition, to accommodate process, voltage, and
temperature (PVT) variations and to increase the lock range, a frequency locked loop is proposed to use in
this circuit. The circuit is designed in 0.18 μm CMOS and the simulations for 27-1 pseudo random bit
sequence (PRBS) show that the circuit consumes 55.3 mW at 20 Gb/s, while the recovered clock rms jitter
is 1.1 ps
Digital Implementation of Costas Loop with Carrier RecoveryIJERD Editor
Demodulator circuit is a basic building block of wireless communication. Digital implementation of
demodulator is attracting more attention for the significant advantages of digital systems than analog systems.
The carrier signal extraction is the main problem in synchronous demodulation in design of demodulator based
on Software Defined Radio. When transmitter or receiver in motion, it is difficult for demodulator to generate
carrier signal same in frequency and phase as transmitter carrier signal due to Doppler shift and Doppler rate.
Here the digital implementation of Costas loop for QPSK demodulation in continuous mode is discussed with
carrier recovery using phase locked loop.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Duty Cycle Corrector Using Pulse Width ModulationVLSICS Design
In circuits, clocks usually play a very important role. Whenever data needs to be sampled, it is done with respect to clock signals. It uses the edges of the clock to sample the data. So, it becomes very much necessary to see to it that the clock signals are properly received specially in receiver circuits where data sampling is done, mainly in Double data rate(DDR) circuits. Due to effects such as jitter, skew, interference, device mismatches etc., duty cycle gets affected. We come up with duty cycle correctors that ensure 50% duty cycle of the clock signals. A duty cycle corrector (DCC) with analog feedback is proposed and simulated in 45nm process technology node. The duty cycle corrector operates for MHz frequency range covering the duty cycle from 35%-65%, with +/- 1.5% accuracy. The design is simple and the power consumption is 1.01mW.
International Journal of VLSI design & Communication Systems (VLSICS) VLSICS Design
In circuits, clocks usually play a very important role. Whenever data needs to be sampled, it is done with respect to clock signals. It uses the edges of the clock to sample the data. So, it becomes very much necessary to see to it that the clock signals are properly received specially in receiver circuits where data sampling is done, mainly in Double data rate(DDR) circuits. Due to effects such as jitter, skew, interference, device mismatches etc., duty cycle gets affected. We come up with duty cycle correctors that ensure 50% duty cycle of the clock signals. A duty cycle corrector (DCC) with analog feedback is proposed and simulated in 45nm process technology node. The duty cycle corrector operates for MHz frequency range covering the duty cycle from 35%-65%, with +/- 1.5% accuracy. The design is simple and the power consumption is 1.01mW.
DUTY CYCLE CORRECTOR USING PULSE WIDTH MODULATIONVLSICS Design
In circuits, clocks usually play a very important role. Whenever data needs to be sampled, it is done with
respect to clock signals. It uses the edges of the clock to sample the data. So, it becomes very much
necessary to see to it that the clock signals are properly received specially in receiver circuits where data
sampling is done, mainly in Double data rate(DDR) circuits. Due to effects such as jitter, skew,
interference, device mismatches etc., duty cycle gets affected. We come up with duty cycle correctors that
ensure 50% duty cycle of the clock signals. A duty cycle corrector (DCC) with analog feedback is proposed
and simulated in 45nm process technology node. The duty cycle corrector operates for MHz frequency
range covering the duty cycle from 35%-65%, with +/- 1.5% accuracy. The design is simple and the power
consumption is 1.01mW.
DESIGN OF FAST TRANSIENT RESPONSE, LOW DROPOUT REGULATOR WITH ENHANCED STEADY...rinzindorjej
Design and implementation of control systems for power supplies require the use of efficient techniques that
provide simple and practical solutions in order to fulfill the performance requirements at an acceptable cost.
Application of manual methods of system identification in determining optimal values of controller settings is
quite time-consuming, expensive and, sometimes, may be impossible to practically carry out. This paper
describes an analytical method for the design of a control system for a fast transient response, low dropout
(LDO) linear regulated power supply on the basis of PID compensation. The controller parameters are
obtained from analytical model of the regulator circuit. Test results showed good dynamic characteristics
with adequate margin of stability. This study shows that PID parameter values sufficiently close to optimum
can easily be obtained from analytical study of the regulator system. The applied method of determining controller settings greatly reduces design time and cost
Optimization of Digitally Controlled Oscillator with Low Poweriosrjce
IOSR journal of VLSI and Signal Processing (IOSRJVSP) is a double blind peer reviewed International Journal that publishes articles which contribute new results in all areas of VLSI Design & Signal Processing. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced VLSI Design & Signal Processing concepts and establishing new collaborations in these areas.
Design and realization of microelectronic systems using VLSI/ULSI technologies require close collaboration among scientists and engineers in the fields of systems architecture, logic and circuit design, chips and wafer fabrication, packaging, testing and systems applications. Generation of specifications, design and verification must be performed at all abstraction levels, including the system, register-transfer, logic, circuit, transistor and process levels
All digital wide range msar controlled duty cycle correctoracijjournal
A clock with 50% duty cycle is very significant in many applications such as DDR-SDRAMs and double
sampling analog-to-digital converters. This crisp presents a Modified Successive Approximation Register
(MSAR) controlled duty cycle corrector (DCC), to attain 50% duty cycle correction. Here MSAR adopts a
binary search method to compress lock time while maintaining tight synchronization between effort and
production clocks. The MSAR-DCC circuit has been implemented in a 0.18- μm CMOS process which
corrects the duty rate within 5 cycles which has a closed loop characteristics. The measured power
dissipation and area occupation are 5581nW and 0.033mm2 respectively.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
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Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.