Science topics: Computational PhysicsSynchronization
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Synchronization - Science topic
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How can we consider quantum entanglement theory and how Neurons may use it within the synaptic space as not only chemical signaling, but also quantum foam signaling? what are physical formulas that we could derive at?
I am working on a study that involves collecting synchronized EEG and eye-tracking data integrated within the iMotions software to examine cognitive workload. I have set event markers to ensure precise synchronization between the data streams. However, I’ve encountered an issue where one data stream (e.g., eye tracking) contains missing values while the other (e.g., EEG) is complete, leading to partially incomplete rows in my dataset.
I would appreciate advice on:
- Best practices for handling missing data in synchronized multimodal datasets with event markers
- Any workflows or tools you’d recommend for preprocessing and aligning multimodal data in this context.
Any insights from those experienced with multimodal data analysis, would be extremely helpful. Thank you!
How to synchronize my research papers with those published on Google Scholar?
Milliseconds matter: Biomechanical inverse dynamics analysis is highly sensitive to imperfect data synchronization
In biomechanical inverse dynamics, small timing errors in data synchronization (such as between motion capture, force plates, or EMG systems) can significantly affect the accuracy of the calculated forces, moments, and joint kinetics. Since these analyses rely on precise temporal alignment of input data, even millisecond-level discrepancies can lead to incorrect estimations of forces and moments, which impacts the interpretation of movement mechanics, performance, and injury risk. Accurate synchronization ensures reliable results in understanding the forces acting on the body during motion.
Hi, I plan to conduct a study that simultaneously collects data from an EEG headset (Emotiv Epoc X) and an eye tracker (Tobii Pro Fusion) using iMotions. How can I ensure the synchronization of these devices? Any assistance would be appreciated. Thanks!
Hello,
I'm working on medical project and I would need synchronized angiography with ECG? Does anyone know if some open source dataset of this kind exist?
Regards,
Bruno
Our brain is not a “stand alone” information processing organ: it acts as a central part of our integral nervous
system with recurrent information exchange with the entire organism and the cosmos. In this study, the brain is
conceived to be embedded in a holographic structured field that interacts with resonant sensitive structures in the
various cell types in our body. In order to explain earlier reported ultra-rapid brain responses and effective
operation of the meta-stable neural system, a field-receptive mental workspace is proposed to be communicating
with the brain. Our integral nervous system is seen as a dedicated neural transmission and multi-cavity network
that, in a non-dual manner, interacts with the proposed supervening meta-cognitive domain. Among others, it is
integrating discrete patterns of eigen-frequencies of photonic/solitonic waves, thereby continuously updating a
time-symmetric global memory space of the individual. Its toroidal organization allows the coupling of
gravitational, dark energy, zero-point energy field (ZPE) as well as earth magnetic fields energies and transmits
wave information into brain tissue, that thereby is instrumental in high speed conscious and sub-conscious
information processing. We propose that the supposed field-receptive workspace, in a mutual interaction with the
whole nervous system, generates self-consciousness and is conceived as operating from a 4th spatial dimension
(hyper-sphere). Its functional structure is adequately defined by the geometry of the torus, that is envisioned as a
basic unit (operator) of space-time. The latter is instrumental in collecting the pattern of discrete soliton
frequencies that provided an algorithm for coherent life processes, as earlier identified by us. It is postulated that
consciousness in the entire universe arises through, scale invariant, nested toroidal coupling of various energy
fields, that may include quantum error correction. In the brain of the human species, this takes the form of the
proposed holographic workspace, that collects active information in a ”brain event horizon”, representing an
internal and fully integral model of the self. This brain-supervening workspace is equipped to convert integrated
coherent wave energies into attractor type/standing waves that guide the related cortical template to a higher
coordination of reflection and action as well as network synchronicity, as required for conscious states. In relation
to its scale-invariant global character, we find support for a universal information matrix, that was extensively
described earlier, as a supposed implicate order as well as in a spectrum of space-time theories in current physics.
The presence of a field-receptive resonant workspace, associated with, but not reducible to, our brain, may provide
an interpretation framework for widely reported, but poorly understood transpersonal conscious states and
algorithmic origin of life. It also points out the deep connection of mankind with the cosmos and our major
responsibility for the future of our planet.
I have simulated a microgrid in Simulink MATLAB; DC link voltage is converted to AC voltage by PWM inverter; The control system is implemented using proportional-resonance or PR controllers and includes two voltage and current control loops. Current and voltage references are applied to the controllers by fixed reference frame (alpha-beta-zero).
The simulation steps are as follows:
In the first step, the inverter must be synchronized with the local network with the help of filters and loops designed in the system (goal: soft start of the inverter).
In the second step, after synchronizing the inverter with the grid, the inverter must feed the balanced three-phase ac load.
In the third step, current control loop references are applied to the inverter, and the inverter should be able to inject current into the local grid without problems. (ID and iq references are converted to alpha-beta-zero format and then applied to the flow controller.)
Until the third step, when the flow control loop references were not applied, the system performed the first and second steps well; But by applying the references of the flow control loop, the performance of the system becomes unbalanced and even the first and second steps do not give the same results as before.
What is the cause of this problem? And why does the performance of the system suffer by applying references related to the flow control loop? It is necessary to explain that we did not have such a problem in single-phase studies.
Thank you for your guidance
in the synchronous fluorescence measurements, the difference between excitation and emission wavelengths (Δλ) was fixed at 60 nm or 50 nm for Trp or 20 nm/ 15 nm for Tyr residues?
please answer which is the right Δλ for both Trp and Tyr? and Why?
Is there any exploratory research that has found that there is a persistent occurrence of estrus expression in early pregnancy in goats/sheep, especially in animals given synchronization treatment?
I just published an academic paper which has been published by a journal. My paper is already successfully searchable on Google Scholar. I was wondering when it will be synchronized in researchgate?
Research the synchronization of chaos in an open feedback system and show the results through a program Matlab
Working on an islanded microgrid consisting of two grid-forming units fed by ideal dc sources and there is a common load. initially, only one unit is supplying the load and the other unit is disconnected. synchronization starts at t=1 s and after a specified synchronization criteria is met, the unit is connected. The problem is that the unit does not contribute in power sharing though it is properly synchronized. The control system includes droop control for power sharing, secondary control for voltage amplitude and frequency restoration, and synchronization loop.
Attached simulation results from MATLAB/SIMULINK
Yellow for first unit initially operating alone
Blue for second unit connected approximately at t=3.5 s
Magenta for load
I have an AC microgrid model consisting of one grid-feeding and two grid-forming units. The control system includes droop control, secondary control, and synchronization loop for smooth connection to the grid. The microgrid works properly in islanded mode and can be synchronized successfully to the grid but when the tertiary control is enabled to manage the power flow, it causes a significant drop in PCC voltage amplitude that causes improper power sharing (the grid active and reactive power don't match the specified reference values). I tried different values of gains for the PI controllers but the problem still exists.
I applied the control loop as illustrated in the attached picture. Are there any adjustments or modifications I should consider?
In a currently running following Youtube video, the British Astrophysicist and Professor Brian Cox claims that there would be 10 km difference/error in position per day for GPS location, if Einstein’s relativity is not used to make a correction in the GPS: https://www.youtube.com/watch?v=Mpw68rvF4pc
The engineers. H.F. Fliegel and R. S. DiEsposti of the GPS Joint Program Office of the Aerospace Corporation involved in the development of the GPS system back in 1997 in a published paper came to the following conclusion: “Except for the leading γ [gamma] factor [in their final equation], it is the same formula derived in classical physics for the signal travel time from the GPS satellite to the ground station. As we have shown, introducing the γ factor makes a change of only 2 or 3 millimeters to the classical result. In short there are no ‘missing relativity terms.’ They cancel out.” General Relativity Theory is not needed”. : https://articles.adsabs.harvard.edu/pdf/1997ptti.conf..189F
At about the same time (1997), Peter Wolf and Gérard Petit in a published paper on “Satellite test of special relativity using the global positioning system”, wrote: “A test of special relativity has been carried out using data of clock comparisons between hydrogen maser clocks on the ground and cesium and rubidium clocks on board 25 global positioning system (GPS) satellites. The clocks were compared via carrier phase measurements of the GPS signal using geodetic receivers at a number of stations of the International GPS Service for Geodynamics (IGS) spread worldwide. In special relativity, synchronization of distant clocks by slow clock transport and by Einstein synchrony (using the transmission of light signals) is equivalent in any inertial frame. A violation of this equivalence can be modeled using the parameter δc/c, where c is the round-trip speed of light (c=299792458m/s in vacuum) and δc is the deviation from c of the observed velocity of a light signal traveling one way along a particular spatial direction with the measuring clocks synchronized using slow clock transport. In special relativity δc/c=0. Experiments can set a limit on the value of δc/c along a particular spatial direction (henceforth referred to as “direction of δc”). Within this model our experiment is sensitive to a possible violation of special relativity in any direction of δc, and on a nonlaboratory scale (baselines >~20000km). The results presented here set an upper limit on the value of δc/c<5×10−9 when considering all spatial directions of δc and δc/c<2×10−9 for the component in the equatorial plane”. Phys. Rev. A 56, 4405 – Published 1 December 1997.
I’m looking at the power output from a wind farm and when for instance the wind speed suddenly drops so does the power output. By using a synchronous condenser (flywheel) that will discharge once the power output from the windfarm begins to drop this will slow the rate of change (power drop) of the wind power . so for example with no synchronous condenser the power drops from 20MW to 10MW after 15s but with the synchronous condenser discharging it’s stored energy it drops from 20MW to 15MW (hypothetically)
I looking at what parameters and equations are needed to show this effect .
The Principle of Synergy because it is based in unit as that one conceived by Ancient Taoism, with its Symbol of Yin-Yang, has taken me to use a pendulum for treating some illness with very good results:
"We end this chapter with a practical application of the principle of synergy and the pendulum. In acupuncture points if you put a pendulum on them, and try to leave it still it will rotate clockwise if the point is synchronized with the fundamental frequency of the point, it will rotate in the opposite direction if it is not, and then to synchronize it you must give it a small impulse clockwise making it rotate for 7 or 9 minutes, and the point will be synchronized and you can check the positive effects by improving the functioning of that point, that is, improving the state of health related to the point. For example, for eye irritation, the Large Intestine 4 point is very effective to calm or improve that
iirritation.
I highly recommend Dr. Deborah Bleecker's book, Acupressure Made Simple, for those interested in the subject, and there you can find points to apply the principle of synergy with the pendulum.
You can also use pellets (small magnetic pellets, or Vaccaria), on those points and you will find them very effective, even for high blood pressure. I know what I am talking about because at my age, 76, one needs to try everything to be in better health, since the entropic degeneration is more and more accelerated, so it can only be slowed down a little with the application of the principle of synergy. Moreover, doing this does not have any side effects, which is one of the main advantages of Traditional Chinese Medicine over Western medicine, since in general drugs have side effects that one has to suffer."
Physics, Semiotic and Ontology
In this link you can find how the entaglement-photons is something very real... i.e, a real Basic Unit System, or else the encient taoism Yin-Yang concept. that describes a unity between complementaries, not opposed
I used the analog ports of myDAQ to trigger the scanner mirror, now I want to synchronize the opening of the camera shutter with the movement of the scanner mirror, so I prefer to use the same myDAQ.
The most frequent interpretation of the Sapir-Whorf hypothesis has been that of a synchronic working. This interpretation focuses on how users of different grammars come to a different evaluation of the world at the same time.
In contrast, a diachronic study would research how the same people come to a different evaluation of the world at different moments in time, in order to investigate how their grammar has evolved. This approach would involve studying language change over time and its impact on thought and perception.
Do you know of any research that has been conducted on this topic? My interest is in applying Sapir/Whorf to the role of communication in crisis resolution, starting from the hypothesis that the solution to the crisis must have found its way into linguistic expressions of the people who originally experienced the problem.
So far, I have been unable to find such research. Any help will be greatly appreciated!
#sapir/whorf #linguisticrelativity #diachronical #crisisresolution #CCO
please tell me schematic/ testing procedure, if available
Is it possible to synchronize research gate with my ORCID entries?
Dear colleagues,
We recently purchased a cable to synchronise the different signals from the Biodex System 3 isokinetic through a PowerLab 8/35 DAQ and LabChart software (ADInstruments). After thorough testing, we have not been able to get the signals to appear in the software. Please, find attached the information of the cable characteristics we followed.
We contacted Biodex (USA and Spanish providers) and they told us that it was necessary to have a tool installed on the computer called Analog Signal Access Interface (ASA Utility)(https://www.biodex.com/physical-medicine/products/software-updates/legacy-software/analog-signal-access-interface).
However, they told us that everything related to the System 3 model was discontinued and they could not provide us with this software.
We would like to kindly request, if possible, if you could share with us a digital copy of the installation file of the ASA Utility. If not, we would like to know if you know of any other possible solution to this problem.
Thank you very much for the attention and help.
I have a problem when using a Generator hybrid excitation synchronous with system gride and inverter and uncontrolled rectifier Vdc Don't follow Vdc-ref
For OFDM-based systems, many algorithms and techniques have been proposed for each baseband functionality like synchronization and channel estimation. Do practical systems like mobiles employ only one of those techniques for each functionality or adaptively switches between a set of algorithms on the basis of performance metrics?
My task is the measurement of the reflection spectrum of the surface of a semiconductor structure. I am using a Xenon lamp as the light source. I am using an Ocean Optics USB4000 spectrometer as the detector. The spectral range I am interested in is 350 - 650 nm.
1 The light from the xenon lamp is chopped at 1 kHz.
2. there is a DC component in the spectrum I am analysing - I want to remove this (unfortunately I have no control over the formation of an additional light source).
Could I ask for help/proposal for a measuring system or configuration of an optical spectrometer to analyse only the ground reflection spectrum over time (removing the DC component)?
Can someone please provide more insight on the mathematical formulation of a frequency constrained UC model, comprising of only synchronous sources, as well as non-synchronous sources. Also what would be the associated MILP code in GAMS?
This figure mainly portrays bifurcation curves for the transverse destabilization of
various low-periodic cycles embedded in the synchronized chaotic
attractor.
I am doing a study where I calculate EEG frequency band ratios of autistic students. I want to know whether frequency band ratios (e.g. alpha/theta) interpret about synchronicity of the EEG frequency bands (e.g. the synchronicity between alpha and theta)?
Thanks in Advance!
Hi everyone. I have three questions about stranded windings in Ansys Maxwell and how to calculate their losses. Also, I want to know how to calculate friction losses in a motor, so I define it in RMxprt. I want to simulate a synchronous motor. It has 12 stranded windings. Each winding has 24 thin wires that act as one wire, with 5 turns. I want to know how I should tell the software that my windings are like this. And how should I define friction and winding losses in it?
Thanks for your responses
Hello,
Until now, we used Mendeley as reference management software when writing articles.
recently we have tried to share the article online (google docs) so it will be easier for multiple people working on the article. I will just add that we all use the same user in Mendeley so the references will be synchronized.
the problem is that all the references were mixed up when trying to work online.
is there any other software that doesn't have this problem?
thank you,
Sapir
I'm using a three-phase PLL for synchronized DG units in a microgrid topology the problem is that when I enable the synchronization loop there is a significant drop in the frequency and it is different from one dg to another could you please suggest a paper or another flexible synchronization method since I use the hierarchical control method.
Thank you so much for your attention.
hello all,
I want to design a Static Synchronous Compensator ( statcom ) in order to investigate its impact on power system stability but I found some difficulties in calculating some values like (the rating of statcom, DC-link capacitance, L, the voltage of tow winding of the transformer .... ext )
Any reference? Please,
For example, if I have two well-log curves, one is the reference curve and the other is the test curve. Half of the test curve can be synchronized with the reference curve by slightly shifting it. But to align the rest of the curves, the test curve needs to manually stretch and compress. We can manually solve the problem by stretching and compressing it but how to make this process automated using machine learning or deep learning?
I want to obtain some M-phase hela cells by cell sorting or synchronization. Is there any way?
Sometime, adherent cell line like A549 in the attached file analysed by flow-cytometry showed 2 different population that can express different level of various markers. My guess is that the bigger one are cell line that are dividing while the smaller one are the newly divided one. I haven't found any paper that confirm or describe this observation.
In order to obtain an homogeneous and unique population of cells will be necessary to synchronize their cell cycle by starvation ? Shall I analyse by flow the 2 population as distinct or as one ?
Moreover, when the same batch of cell were fixed and permeabilized, they showed a unique and homogeneous cell population by size.
Thanks for any heads-up
I start learning about synchronization between different states and criticality in Parkinson's disease. Would it be possible for someone to recommend a relevant and practical review paper that examines the new challenges arising in this field?
Dear researchers,
I run a research model in AMOS. I came through this reality that my mediating variable can also play moderating variable simultaneously both theoretically and statistically theoretically. My question is if there is any justification to prove this synchronization effect?
Error in port widths or dimensions. 'Output Port 1' of 'variable_speedwith_gearratio/Permanent Magnet Synchronous Machine/Electrical model/abc2qd/Mux3' has 46 elements. This port does not accept the dimensions (or orientation) specified by the output signal.
During the operation of industrial hoists an external mechanical vibration happened using two synchronous motors (master and follower)?
Is it solve this problem?
Hello,
Would anyone have any suggestions for up to date resources regarding the optimum amount of hours for synchronous learning? I am looking for data on optimum number of hours of digital learning per day, per week, and per month.
I would also be interested in any research done on the optimum duration of a virtual classroom.
Any suggestions for up to date literature would be helpful and welcomed.
Thank you!
Aliaa Shaaban
Hello everyone
Is the maximum torque per ampere (MPTA) method only applicable in case of synchronous motors or can it be used in the control of generators?
Two synchronous machines with different mechanical torque inputs of say 2 Nm to 17 Nm for machine 1 and 5 Nm to 15Nm for machine 2 are to be specified in the form of droop control for stability analysis. An idea on how this could be implemented in MATLAB would be so much appreciated. Any relevant journals that could be of help would also be appreciated.
In my thesis, I will study the leader behavior's or leadership styles effect on job satisfaction. I am intend to use single factor job satisfaction scale such as Michigan scale, Abridged job in general or global job satisfaction scale. I am curious about which leadership scales work well such single factor job satisfaction scales? If anyone have such experience about this topic, could you please give me some advice?
Thank you in advance.
Hello everyone, I would like to synchronise mouse embryonic stem cells in either G1 or G2/M phase in order to study the transcription of a set of genes of interest. I'm having some trouble finding a suitable protocol. Any recommendation is appreciated!
I am measuring the tensile strength of thin (<1cm) dumbbell-shaped nanofiber membranes.
I have developed a custom tensile testing setup which primarily consists of:
1. A movable stage.
2. A load cell of appropriate force rating is attached to the moving stage.
3. A DC power supply to excite the load cell.
4. A digital multimeter connected to the DC power supply to measure the output voltages from the load cell.
5. A DSLR camera to record photos of the nanofiber membrane at regular intervals during the tensile testing to measure strain.
I am using a camera to record photos of the nanofiber membrane to calculate strain using a GUI based MATLAB program that tracks the edge of the moving end. I am using an optical method to measure strain because I cannot attach an extensometer to the nanofiber membranes as they are fragile and it won't be feasible.
The target of my experiments is to obtain voltage outputs from the digital multimeter every 1 sec and photos from the DSLR camera also every 1 sec with the measurements from the digital multimeter and the DSLR camera being in perfect sync.
I am currently triggering the digital multimeter using an Excel script provided by the manufacturer of the digital multimeter and I am using an intervalometer to trigger the DSLR camera. The problem is I am triggering both instruments manually and therefore the measured voltage and recorded photos are not in sync.
Can anyone please give me suggestions on how to sync both hardware which are from different manufacturers?
For thinking - in regard to overtaking "believes, dogmas"
Blind adoption of believes, dogmas by people in populations (Psychology of the Crowd, by Gustave Le Bon) seems to be psychologically coupled and physically from a social scientific point of view explainable:
here, too, synchronization within masses occurs
- and it seems also in accordance to the Kuramoto model.
For this, only a corresponding marketing strategy, seems to be necessary (applied maths / physics).
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Basis:
Yoshiki Kuramoto assumed in 1975 that there is a weak relationship (better coupling) of oscillating systems (oscillators) and that these are almost identical.
Kuramoto found that mathematically between each pair of coupled oscillators, their interaction is sinusoidally dependent on the respective phase difference, resulting into the so-called
*Kuramoto Model*
This even can be illustrated using initially non-synchronous metronomes, which in the course (under certain conditions: moveable surface) synchronize themselves.
This even seems a basic model in nature, biology, chemistry, physics and/or social sciences: – synchronizing of coupled systems:
– collective flasing of fireflies [Buck 1988]
– collective oscillation of pancreatic beta cells [Sherman 1991]
– the heartbeat synchronized with ventilation [Schäfer 1998]
– pedestrian induced oscillations on bridges [Strogatz 2005]
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References
-Kuramoto, Yoshiki (1975) Self-entrainment of a population of coupled non-linear oscillators. In: Araki H (eds.) International Symposium on Mathematical Problems in Theoretical Physics, Lecture Notes in Physics, Volume 39, Springer-Verlag Berlin, Heidelberg. DOI: 10.1007/BFb0013365.
-Buck J (1988) Synchronous rhythmic flashing of fireflies, IIi. Q Rev Biol (63)3), 265–289. DOI: 10.1086/415929.
-Sherman A, Rinzel J (1991) Model for synchronization of pancreatic betacells by gap junction coupling. Biophysical journal 59(3), 547–559. DOI: 10.1016/S0006-3495(91)82271-8.
-Schäfer C, Rosenblum MG, Kurths J, Abel HH (1998) Heartbeat synchronized with ventilation, Nature 392(6673), 239–240. DOI: 10.1038/32567.
-Strogatz SH, Abrams DM, McRobie A, Eckhardt B, Ott E (2005) Theoretical mechanics: Crowd synchrony on the millennium bridge, Nature 438(7064), 43–44. DOI: 10.1038/43843a.
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Credit 'spontaneous synchronization of metronomes' video
#psychology #synchronization #nature #physics #chemistry #biology
Please i need a guidance or a referred material that can exclusively explain how to determine the droop coefficients (both for a machine and multi-machine connected grid system) and is there any standard to the maximum active or reactive power synchronous machine can inject to or absorb from the grid
Measures of interest:
- active power [p.u.]
- electric frequency [p.u.]
- mechanical power [p.u.] (in the case of synchronous machines) or equivalent in the case of renewable energy sources (RES) controllers.
Questions
1) Is it reasonable to assume that the provider has access to the measures of interest at the bus of each synchronous machine or RES (and in general all sources of inertia)?
2) Is the answer independent from the network dimension or does it vary according to the considered level (local, regional, national)?
I have three 1-ph inverters and they are needed to be connected to a 3-ph grid. For such, all the three inverter's output voltage must have equal frequencies and 120 degree phase shifted. In other words, they all must be in synchronization. I'm developing a model using Simulink.
I've built a multi-valued logic model containing 64 nodes. Do someone here know a tool able to run 1,000 initial states for this simulation in synchronous update?
The purpose of synchronizing two systems is to provide the conditions for the dynamic behavior of two similar or different systems to coincide with non-identical initial conditions over time.
In disease or medical systems where the output of shapes is often exponential according to defined parameters and variables, is it possible to synchronize the two systems?
Hi,
I am looking for clock time synchronization for autonomous vehicles network, can anyone please suggest simulation software and some good publication to start with.
Thanks
SA
there are some differences between these two types of generators.
Hello dear friends,
I am looking for a computational process on which I had to synchronize signals with different sample rates. The signals period is static but different. Also, they should not be lost. The signal rates are not so much (under 1 Khz). What sort of algorithm or method would you suggest to me?
Simple upsampling and downsampling are not desirable.
Sincerely yours.
Hello,
I have been working on a project where I have to mix multiple audio signals of the same source coming from different slave smartphones on one master smartphone in a distributed way. Now I have aligned multiple audio packets (Packet level synchronization) in real-time (still unable to do sample-level synchronization) but when I mix them I get a comb filter effect.
My packet contains 40ms of data at a sampling rate of 48KHz. How can I eliminate this effect?
I am more into ways of making it smooth rather than subtracting delayed signals? Is there any kind of filter somewhat "AntiComb Filter" to make this happen?
Regards,
Khubaib Ahmad
Citations of my articles are not recorded in research gate which are available in google scholar and vise-versa. Could you please synchronize your citation counts with google scholar so that no citation is left. Alternatively, how can I manually entry the citations which are not yet recorded?
- In our fluorescence instrument, if I select Scan mode as Synchronous then it asks to give Emission wavelength ( EM WL), Excitation start wevelength (EX start WL) and Excitation end wavelength (EX end WL). Then How to fixed Δλ = 15 nm or 60 nm as many literatures suggest for synchronous fluorescence of BSA.
- If the maximum intensity is observed at λex = 346 nm, is it the way to put EM WL at 331 nm to maintain the Δλ = 15 nm and EM WL at 286 nm to maintain the Δλ = 60 nm?
Besides positioning solutions, Global Navigation Satellite Systems (GNSS) receivers can provide a reference clock signal known as Pulse-per-Second (PPS or 1-PPS). A TTL electrical signal that is used in several applications for synchronization purposes.
- Is the PPS physically generated through a digitally-controlled oscillator (or line driver) whose offset is periodically re-initialized by the estimated clock bias (retrieved by means of PVT algorithms)?
- Are there any specific filters/estimators devoted to a fine PPS generation and control?
- Does some colleague know any reference providing technical details on this aspect?
Edit: Thank you all, we have closed the survey for responses.
Hi all,
We are conducting research on the metaphorical perceptions of higher education instructors towards their roles in synchronous hybrid learning.
Could you please help us by filling out this short (about 3 min.) survey?
Here is the link:
Dear colleagues,
what are applications where low voltage, variable frequency driven synchronous machines (both PMSMs and electrically excited) in the power range of 1 - 10 MW and rotational speed range of 100 - 400 rpm are suitable?
Dear Janne:
I think you could benefit from this valuable article about your topic at:
Also for example, you can check on the following, from TES VSETÍN s.r.o.
Jiráskova 691, 755 01 Vsetín, Czech Republic:
Small Hydropower Plants – GSH, GSV, GSP
Generators for small hydropower plants are distinguished by robust construction and excellent parameters with high efficiency. They are attractive, above all, due to the combination of high reliability and innovation that they feature. This results in an economically advantageous solution. Thanks to a new design of rotors with salient poles,the machines achieve high outputs up to 30,000 kVA. Our long experience ingenerator manufacturing has resulted in the production of ecologically clean energy in more than five hundred hydropower plants.
Wind – GSV, GSP
Synchronous generators have been optimized for outputs up to 30,000 kVA, they feature high efficiency and precise speed regulation. A new innovation is our generator with permanent magnets with outputs up to 4,000 kVA. Thanks to the progressive design, the machine is 30 % lighter than machines with a wound rotor. With excellent efficiency, easy installation and longer service intervals, the machine maximizes yield. The generators are optimally compatible with the mains; feeding is ensured with frequency converters.
Marine – GSH, GSV, GSP
These generators are suitable for use in the shipping industry: for tankers, supply ships, multi-purpose cargo ships and ferryboats. They are used to feed electrical networks, emergency supplies of special aggregates or for auxiliary drives. The machines are intended for individual or parallel operation.
Pilot exciters – BP
Special synchronous generators with permanent magnets, which are used for power supply of automatic voltage regulators of synchronous machines and other devices with suitable parameters. The maximum power of the pilot exciters is 3500VA. Speed range 0-1500 rpm. More information can be found in the enclosed pilot exciters datasheet.
I hope it will be helpful ...
With my best regards ...
I have preparing my PC-3 cells for a cell survival assay. I starve the cells for 16-18 h to synchronize my cell in G0/G1. when I check my cells they are more confluent than before. shouldn't cells stop going through the cell cycle during synchronization? Should i except growth to effectively stop after the 18th hour and not before?
I am also not sure of the starvation period, I have seen longer periods in the literature. can someone please confirm for PC-3 starvation time?
Thank you
Good morning everyone,
I would like to synchronize my image acquisition with some external event happening in my sample. I explain better.
I have a microfluidic device actuated with a pneumatic system. This pneumatic system is controlled via a Matlab script. I would like that microscope and Matlab script somehow talk to each other (maybe through MicroManager?) so that when a certain condition is respected in Matlab, the microscope takes an image.
For istance, the functions performed by the microscope might work something like this.
loop:
- go to position 1 and stay there
- when the pressure is zero take a picture
- wait 15 min
- go to position 2 and stay there,
- when the pressure is zero take a picture
- wait 15 min end loop
Does anyone have experience with this? I tried to give a general idea of my needs based on the system I am using already, but I am open to more system and ideas. Any suggestion or advice is very appreciated.
Thanks for you time and help,
Simone
is anybody having research paper on stolon synchronization and tuber initiation in potato seed
Using a MUT vs parent cell line, my colleagues and I have seen increased proliferation in MUT cells. To address this further, we have been synchronizing cells 48h in 0.1% serum (with 10mM sodium butyrate added for the last 24h, G1/S block) and then releasing them back to 10% FBS and monitoring cell cycle progress using PI. I'm having some difficulty interpreting the data, so thought I would check on here to see if those more versed in cell cycle analysis can help. Here is what we are seeing:
1. Unsynchronized WT cells actually have reduced % cells in G2/M phase (14% vs 17% in parent cells, so mild).
2. After 48h of synchronization, we now see MUT cells having increased % G2/M phase (11% vs 9% in parent cells).
3. When we release the synchronized cells and put them back into 10% FBS, 12hr/16/20h later the MUT cells all have increased %G2/M (10%/6%/3.5% vs 6%/3%/2% in parent cells) as well as increased increased % S at 12h/16h (12%/13% vs 6%/9% in parent cells).
These differences, while statistically significant, seem mild, but would the interpretation be that the MUT cells have increased entry into G2/M phase? I was expecting to see a huge defect in the majority of cells that are synchronized, but at 24h when the bulk of the cells are in S phase, I don't see a difference between MUT and parent cells. I'm not sure how to interpret this, but am wondering whether I should consider synchronizing the cells at a different point in the cell cycle to try to bring out what appears to be acceleration to G2/M phase.
Any help is greatly appreciated! This is my first time giving cell cycle analysis a go so I'm a bit of a newbie here :)
I am exploring potential chemical based approaches for cell cycle synchronization and would like to hear from anyone with experience on this technique what they believe to be the most applicable approach with respect to ease of use, reproducibly, cost, etc. An ideal technique would be one that is easily reversed allowing for dissection of multiple stages in a synchronized fashion..
Generic schematic is shown below for understanding.
Answer to the aforesaid question is requested from the experts, while considering the power flow equation i.e P = [Vs*Vr*Sin(theeta)]/X
