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Rolls-Royce, a famous ever in the world, is now has a difference inside its management.
Rolls-Royce is creating an environmentally friendly identity both inside and outside of its perfomance.
Decarbonization is a priority in current business, along with exceptional cars.
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The reality of global warming imposes itself and the largest companies are taking attitudes such as those of RR - which needs to change, especially in its area of operation.
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I suppose there have been questions of this kind, but I do not know how to find them. (Maybe somebody can tell me.)
A task: to transport one ton (1000 kg), at the distance of 100 km, by sped of 100 km/h.
How much pollution is produced, and how much energy is spent to perform this (or similar) task by: (1) steam locomotive, (2) electrical car?
In case (2), the pollution must include the production and decommissioning of batteries, as well as the fact that most electricity is produced by fossil fuels (such as coal). The consumption must include all the losses of energy in transformations, from the power plant to batteries, and from the batteries to electrical engines in the car.
Clean vehicles are surely good for cities, but I do not know how good they are for the planet.
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Clean vehicle means a new road transport vehicle complying with an "EEV" (Enhanced Environmentally friendly Vehicle) standard as defined in Article 1(c) and quantified in Section 6.2.
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Why didn't various pro-environmental solutions become widespread over 100 years ago when they were created, but are only now starting to become widespread?
The first electric cars were built at the turn of the 20th century.
The first biofuel cars based on ethanol were already being built at the beginning of the 20th century. The first bicycle lanes in European cities were built as early as the end of the 19th century.
etc.
Why did these kinds of pro-environmental solutions not become widespread over 100 years ago when they were first developed, but are only now starting to become widespread?
And what is your opinion on this topic?
What do you think about this subject?
Please respond,
I invite you all to discuss,
Thank you very much,
Regards,
Dariusz Prokopowicz
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Dear Dariusz
I asked myself the same question many times. In my humble opinion it could be attributable to the oil companies. Remember that in the 50s. the excellent streetcar network of Los Angeles was dismantled and replaced by buses, 'courtesy' of General Motors
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Hi everyone,
I am very new in the field of MD Simulations. I have started with a simulation of clay in water (Dynamics of carbohydrate strands in water and interactions with clay minerals: influence of pH, surface chemistry, and electrolytes - Nanoscale (RSC Publishing)). I am using the montmorillonite_CEC90 structure and given force field from supplementary material.
I don’t know how to convert .car/.mdf to .pdb/.psf and then convert the forcefield to gromacs. I have tried the following command but it’s too many forcefield/automass options applied to one input file (don’t know how to fix this) $ ./msi2namd.exe -f montmorillonite_CEC90_pH3.car montmorillonite_CEC90_pH3.mdf -res -inp -o montmorillonite_CEC90_pH3.pdb montmorillonite_CEC90_pH3.psf -ignore -nocenter -print 3
Can anyone help me how to solve this problem?
My apologies if it may sounds obvious solution to some people but I am new trying to use this conversion and I am really stuck.
Thank you in advance.
Nikolina
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What was the error message?
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I recently came across a paper exploring CD27/CD70 CARs and I wanted to know the history of why CD4/CD8 was explored first
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CAR-T therapy yielded it's malignancy eradication efficacy via similar mechanism that lympho-system defensed against pathogen. Importantly, antigen presentation process involved MHC class recognition. I assumed that previous CD4/CD8 based CAR-T theory originated from this idea. But surely, you may try CAR-T involving other CD markers if feasible.
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Hello,
i am making researches about what can affect (or what could improve) the adhesion of CAR
if any one have articles for this topic, please let me know. Thank you very much!!
best regards
chiko
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Bonding onto caries affected substrate would be challenging similar to a sclerosed substrate, longer etching time, preferably a 8th or 9th gen bonding agent followed by a good resin will do the needful provided we have good rubberdam isolation
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In the future, fuel cells could power our cars, with hydrogen replacing the petroleum fuel that is used in most vehicles today. Many vehicle manufacturers are actively researching and developing transportation fuel cell technologies. Stationary fuel cells are the largest, most powerful fuel cells.
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Only some notes:
  • Fuell cells are producing electric energy. The architecture of a car with fuel cell is similar to hybryd cars: the fuel engine and the alternator.
  • Fuel cell can work with a wide range of fuels including also biofuels
  • the room of efficiency improvement of fuel cells is not limited by themodynamic limits, we can guess in higher efficiency of the system
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Why self driving car using Artificial Intelligence.What make them essential overcome on complexity, localization, security challenges by AI? How algorithm is useful to resolve such challenges?
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Dear Keith,
I think AI helps path planning navigation system easier and powers self driving vehicle frameworks such as automatic detecting peoples and traffics.
Ashish
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If yes or if you are interested in this question, I would like to have a chat.
I have been working on this question for a long time. Most of us already know that the first best solution to externalities revolving car driving does not involve registration taxes. Taxing cars instead of driving would thus have distortive effects.
I believe we might be undermining this distortion. I believe that when you take into account long run decision making often not accounted for in welfare models, the distortion is even bigger. Long run decision making such as people's decisions of where to live, firm's decisions on where to locate, and the resulting developmental decisions about where and how densely to build.
I have the hypothesis that if a government is given the choice between using registration (fixed cost) taxes and gas/kilometre (variable cost) taxes on driving, while holding revenue from these taxes constant, the variable cost choice would cause the city to be built more densely over time than the fixed cost choice. (Over time since rome wasn't built in a day).
First attempt was in my Master's thesis, where I used a monocentric city model with Cobb-Douglas utility and two travel modes. I was able to show that reducing the fixed tax and increasing the variable tax holding revenue constant indeed did make the city smaller. It also reduced the total amount of kilometers driven in cars (despite more people owning cars since they got cheaper) because people lived closer to the centre. I also showed that when you held the city shape constant in this proces, the total kilometers from the same change increased because the decisions didn't show in people's movement choices.
I have later come to realise that there are some flaws with my model, and have since worked on an improved model with log-linear demand utility with just the one mode (the car). It has proven to be a big technical challenge for me.
I have also tried empirical methods. I have a dataset of 100 cities worldwide and across developmental levels. This includes variables such as vehicle cost per kilometre, yearly capital cost per car, yearly driven kilometres in cars, commuting time, commuting distance, and 100 other variables. And have been looking at a model that measures the effect of variable costs and fixed costs on kilometres driven in cars (controling for gdp per capita for metropolitan areas) to see which has the biggest effect, but apart from obvious endogeneity issues, I also am not really able to show through which mechanism there might be an effect (whether it is indeed due to how the city is developed differently), but the model does indeed show that registration taxes are insignificant and that variable taxes are not.
I could use some brainstorming with other researchers interested in the same question. If you're interested in having a discussion about it in any way, please let me know.
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A registration tax only increases the annual fixed cost of a vehicle, while fuel taxes account for a significant portion of variable costs. Therefore, it goes without saying that the amount of variable costs influences the decision on where to reside much more than fixed costs do. In order to recognize this, I do not need any empirical analysis!
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Is it possible to run an analysis in which the steering wheel angle at zero speed is an input in ADAMS Car software? If possible, could you please explain?
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Adams/Car has a parking effort maneuver. you could be use this standard definition. If I remember correctly, this maneuver. should have been added on 2019 or 2020 version.
Or use the Event Builder. First of all you should run the quasi-static analysis, then you can add the steering input by rearranging the *.xml file.
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Most car-following models were developed on the basis of some theory, observational studies, or a combination of the two. Many researchers have also used machine-learning algorithms such as neural networks and deep-learning for modeling car-following behavior. But machine-learning approaches are sometimes criticized because they are black-box models.
Would you use a neural network / deep-learning car-following model in simulations for investigating crash behavior/emissions / autonomous/connected or general car-following behavior? Please share your opinion. Thanks.
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I have some experience with studying and developing ML based car-following models since I asked this question. One thing I notice is that most articles that propose ML/DL car-following models do not compare predicted trajectories with observed trajectories of acceleration, spacing, and jerk. Only a few studies show predicted trajectories of speed only. All of these studies report metrics such as RMSE, R^2, etc.
In my experience, even with small RMSE values, the predicted trajectories are not necessarily similar to the observed trajectories. Believing that a ML-based car-following model is sufficient for use after comparing RMSE only is therefore not a good approach. A detailed comparison between the theory-based and ML-based models is needed. That should include metrics like RMSE but also dynamic time warping (to compare time-series with time lag), and qualitative comparison between predicted trajectories.
Car-following models also need better fitness functions for calibration/training. Times of reaction and magnitude of acceleration are important aspects that are likely ignored in both conventional and ML based training approaches.
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Different possible causes of flaking of leather.
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Automotive leather typically uses water bourn finish systems due to VOC constraints. These systems have an increased risk of finish cracking through excessive flexing wear due to the use of crosslinker, Carbodiimide and isocyanate. The crosslinkers will increase rigidity and therefore increase flex failures.
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Dear all, would anyone help me to find a vendor, which can supply a human CD19 CAR vector?
We need a packaged lentiviral (or possibly retroviral) vector for use with Clinimacs Prodigy (Miltenyi).
We recently purchased Clinimacs Prodigy and some accompanying equipment. Currently need to organize training on using the equipment including Prodigy and cell analyser. It appears that Miltenyi will no longer supply customers of their equipment with the vector.
But we need the vector. If we have no one, we won't be able to prepare CAR-T cells and will not be able to test the process in our hands.
At this stage we do not plan to use the CAR-T cells for treatment of patients, only for training and in vitro testing. Thus, we can use non-GMP vector.
Do anyone know a commercial company which can sell us some sufficient amount of the human CD19 CAR vector? Kindly give contacts of any suitable vendor (in US, EU, China, any country).
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You may contact Creative Biolabs (https://www.creative-biolabs.com/car-t/) or Creative Biogene (https://www.creative-biogene.com/). They provide some ready CAR constructs or LV vectors, or can prepare them according to your demands.
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I'm currently working on a project that is using the SST k-w model. After carrying out the calculation of the given car contour , in two different mesh qualities (fine and rough), I get two different plots for the C_w values. So my question is how did the grid quality affected the results?
edit: The rough mesh consist of 14915 cells and 27288 Nodes while Fine Mesh is made of 27934 cells and 46319 nodes.
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Hi, as of my CFD experience, the RANS turbulence model for CFD simulation, the first wall spacing grid should have a y+ ~1. The first wall spacing in different meshes may affect the simulation results. Just a little self-experience. Hope that can help you :)
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I am evaluating tracking and counting methods to count and track vehicles in an intersection, I want an idea on how I can modify the detection line to count the vehicles such that it counts the cars passing each late because using one line detection method might leave other cars out.
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Thank You
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Recently the concept of opposed piston engines has made the news, claiming an efficiency increse from 25% (conventional) to 45%. Production costs for opposed piston engines are rumored to be the same as conventional models, in contrast to the subsidies electric vehicles receive. Although the new design still has emissions, the levels will be much less and fuel efficiency increased - for the same production cost.
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The mass adoption is yet to begin.
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Solar electric car
Reduce the need of recharging cars; and is especially beneficial in cities with traffic jams; as peak traffic hours are usually during the day.
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Solar electric car
Reduces the need of recharging cars; and is especially beneficial in cities with traffic jams; as peak traffic hours are usually during the day.
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How are the messages in V2X verified? May somebody share inks or paper so that I can learn more about this?
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Dear Dr. Jivthesh M.R ,
I suggest you to have a look at the following, interesting references:
- Securing Self-Driving Vehicles with Artificial Intelligence
- Self-Driving Vehicle Verification Towards a Benchmark
- Mobile Authentication in Self-Driving Cars: Present and the Future
- Lyft patents notification system for self-driving cars to communicate with pedestrians
- Hybrid Verification Technique for Decision-Making of Self-Driving Vehicles
My best regards, Amir Beketov.
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Dears,
I have used fresh leaves methods (1 g of the leaf tissues using 80% acetone) using these equations:
[Chl a (mg.g-1) = (13.95OD665−6.88OD649)V/200 W];
[Chl b (mg.g-1) = (24.96OD649− 7.32OD665)V/200W];
[Car. (mg.g-1) = (1000OD470−2.05Chl a−114.80Chl b) V/ (245×200 W)].
Where; Chl a– chlorophyll a, Chl b – chlorophyll b, Car. – carotenoid, V –volume, and W – sample weight.
what about dry leaves methods??
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The procedure and formulas are pretty much the same.
However, unless you freeze-dry the leaves, you'll lose a lot of chlorophyll through the process of drying. Chlorophyll is degraded very easily. Normal drying methods like heat drying or sun drying will make the leaves lose a substantial amount of chlorophyll.
If you don't care about that, though, and just want to, say, see how much chlorophyll is left after drying, then just do like with fresh leaves.
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Hi,
I have a large data set of vehicles, I have make/model/age/fule for each vehicle. I need engine capacity( displacement) to be able to categorize my data into for example mini/small/large diesel passenger cars.
What is the easiest way to find or estimate engine capacity?
thank you
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Md.Nahidul Islam Himel thank you for the link, but I do not have that info and i have only make/model/age/and fuel/type, and the data set has more than 16000 cars, i am looking for a way to classify them to mini/small/ large and so on
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Hi,
I have a technical question about the cars,
In my dataset, I have the make/model/age/fuel of vehicles, what I need is the engine capacity of cars. I need to categorize them based on engine capacity to mini, small, medium, and large.
what is the easiest way to do that? I found a database of technical attributes of cars, but it takes a lot of time to search for each vehicle and for example do make/model of all ages have the same engine capacity? or should I check make/model/year to find engine capacity?
thank you
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There is no correlation between make/model/ages and engine capacity. Vehicles of the same make, model and ages may have different displacements. Thus, the only way is to find the matching vehicle's engine capacity using your known properties (other parameters may be required).
If you want to process large-scale data quickly, you can use python, in which the package pandas can match two databases by the same fields.
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I was able to get the index values until February 2020. Is there a website where one can download the other values (after February 2020)? Is there a script I can use to calculate the indices myself?
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I will need information on (i) the Best countries to ship cars to Antigua and (ii) Year make and model of the popular cars. I look forward to positive feedback in earnest.
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Dear Dirker Karel, thank you very much for the information.
I appreciate it.
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Assuming operating frequency is 106MHz and power is -20dBm, is it possible that an FM radio frequency energy harvesting system is powering the olfactory e-nose sensor in an AI self-driving car?
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-20dBm is 10 microWatt. The best energy efficiency demontrated for such conditions is perhaps 20..40%. E.g. as in the plot below taken from
It is quite small power e.g. Lithium coin battery may provide such power over several years.
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Hello,
Is there any car classification dataset that can be then also used for a potential commercial use? Or some network's weights pre-trained on such a dataset? I have found several car classification datasets but they all are for non-commercial research only.
Thank you.
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If we assume that Tesla's resources are dedicated to developing deep reinforcement learning-based autonomous driving cars, would they be able to achieve full self-driving?
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self-driving cars learn by translating the actions of surrounding vehicles into their own frames of reference—their deep learning algorithm–powered neural networks. These other cars may be human-driven vehicles without any sensors, or another company's auto-piloted vehicles.
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We have recently generated CAR-Jurkat and CAR-pbmc cells, however, although the initial CAR% is around 80%, after 2 days of culture in vitro, the CAR expression dramatically falls to 20% or 0%,does anyone have any suggestions OR similar experience?
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which promoter do you use? Some promoters will be silenced in cells.
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Have anyone detected the CAR expression on macrophage cells?
Which method is preferred to use?
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Follow this link, you can take some information from this paper regarding CAR.
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Hi, I tried to do topology optimization on wheels as part of my dissertation trying to make light weight wheels for a student formula car but don't understand what I'm doing wrong. I'm using ansys
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Hallo,
1. Material should be clustered.
2. There MUST BE some boundary condition is wrong, because of the completely disconnected in the central area. In addition, the pressure of the inner tube should also be considered, or just make the contacting area non-designable.
3. Circumferential repetition conditions should be added.
4. Element size is too big, which is a general problem in FSAEers. With such small elements to make topology optimization is serving no useful purpose at all.
I wish you a light and strong job in advance.
Best Regards,
Wei Huanxia
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I have modelled a Beam and Car using Abaqus for impact analysis. During the analysis, the Car passes through (Penetrates) the beam without any impact. Can anyone please give me any valuable suggestions? Thanks in advance!
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You may probably not define the contact surfaces properly. I recommend you visit the below package to fully understand how to simulate impact analysis.
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How will I check if polypropylene oil is of standard quality and can be used as car fuel.
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If you mean as fuel product the pyrolytic oil, to define its quality is depending on many factors: water content, density, viscosity, surface tension, heating value, ignition properties. Also the quality must be associated to the final use to the fuel. Eg. Burner, engine, or after downstream separation and purification processes for their use blended.
Some recommendations:
Polymers 2019, 11(9), 1387; https://doi.org/10.3390/polym11091387
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I want to study the response of a quarter car vehicle suspension model to random road profiles (such as class C road) . How to generate a random road profile using simulink?
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To further add to my previous answer, if you are aiming for a particular class of road (e.g. Class C from ISO8608) you can calculate the Power Spectral Density of the white noise input, and then scale the amplitude up/down to match the PSD from the real road.
At a vague guess I would start with white noise with an input amplitude of 30mm, and work from there.
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Hello community
Has anyone experineced the tracking of a moving object with the new Pupil Labs invisble eye tracker ?
I defined my screen computer as a surface with QR codes but now, within that surface i would like to have a dynamic AOI (a moving car on the screen).
Do you know if the Pupil ecosystem has somrthing built-in for this ?
Thanks
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just in case, my direct email is i.korjoukov@okazolab.com
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Dear all,
Very new to MATLAB , but not programming. Had to work on this assignment of designing a quarter car model suspension system by using the optimization techniques like Genetic Algorithm, Simulated Annealing or Particle Swarm Method. Which is the best suitable technique for this so that i can get the optimization done efficiently ?
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Andrew Bradley , thanks for the meaningful insights !! :)
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For example, this competition pulls down ITS equipment (Navigation, sensors etc) and new generation car prices drop.
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In the end it is a better mobility: Less air pollution, more safety, less travel time, less space.
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Hi,
How can I simulate a traffic dataset(gather information of each car for one month or more) for location prediction of the vehicles? In other words, can I have a dataset that I use its features as inputs to my time series neural network model?
Is there any way to doing that?
The main reason that I cannot use a real dataset is that I want each car to send a packet to the nearest RSU that consists of vehicle speed, vehicles direction, and Car_ID and time-stamp.
I want to even differentiate rush hours and non-rush hours, driver preferences, weather type, etc.
Based on the above factors, the driver changes its route. So I don't want to have a static route for each id_Car. Instead, I want to have different routes for each car, based on traffic speed in each lane.
Any help would be appreciated.
Thanks
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Hi all,
If I have polygon features and each point has multiple values across time. Say
Feature Day Car_Ridership Bike_Ridership
polygon1 1 40 5
polygon1 2 50 10
polygon1 3 15 7
polygon2 1 100 35
polygon2 2 150 50
How can I conduct a regression analysis while also accounting for contiguity matrix (e.g. neighboring polygons) and try various spatial model (e.g. Spatial lag model or spatial error model) ?
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This link maybe useful. R is open-source software
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A Future undergraduate research project is planned to build an experimental model for active suspension (simulating a quarter car model) to apply different control strategy including LQR. What would be the suggested components and modules to build the experiment? Shake Table II (https://www.quanser.com/products/shake-table-ii/) is available and might be utilized with some acceorometers.
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Regarding active suspension system, I suggest active actuator combined with variable damper. Basically this is the physical vibration control problem, there must be a spring elements also present.
At first you should define the control function and relevant bandwidth. Because each actuators has its bandwidth ranges. High bandwidth actuator typically requires high cost.
For LQR (we already tried LQR in c-code level with real-vehicle), you should define the appropriate states definitions. If you choose relative displacements as a states, you had better adopt LVDT (or RVDT) sensors. You may build the system with acceleration sensors also with good estimation algorithms.
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How to attempt the scientific fuel consumption test of car for specific travel along with travel history....?
How to get data from ECU to get exact fuel consumption.............?
Can we get data by separating injector sensor in external data logger...?
Is it essential to use scanner for ECU data fetch....?
Please give suggestion or answer of above questions ... Please help me to get exact fuel consumption test... Thank you
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The materials that are used to construct environmentally-friendly (zero-emission) products such as electric cars are primarily produced by mining. For example cerium (for UV glass filtration), europium and indium (for touch screen sensitivity), neodymium (for electrical to chemical energy conversion), cobalt and graphite (the primary materials of the electric car battery), and lithium (for charging and discharging electric energy). The mining process of some of these materials results in poisonous dust, and the increase in mining will increase the health risk as well as result in decreasing soil fertility in the mining cities. Hence, do electric vehicles really deserve such great attention?
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It's simple - electric vehicles certainly reduce the environmental load in the places of their use, but increase it many times in those places where raw materials are mined, components and electricity are produced. Is the division of labor being replaced by the division of emissions?
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Assume vehicle is off and windows are closed. Can enough fresh air enter through door seals or fresh air intake in cowling to provide enough oxygen. Assume one person is in car.
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Richard Muscoplat I guess its actually carbon monoxide maximum!
However, According to a recent research by Swedish sensors maker Senseair, CO2 levels reach 1,000 ppm in 1.5 minutes, 2,500 ppm in 5 minutes, and frightening 6,000 ppm after 22 minutes, although with air flow ventilation powered on! Drowsiness is also a factor for 10% to 30% of car accidents annually, with high CO2 levels being a significant contributor. The usage of CO2 sensors in automobiles can help manage ventilation and perhaps protect fatalities. Modern automotive interiors are modeled to constantly deliver adequate air flow to manage CO2 levels for an individual traveler around or underneath 2,500 ppm. Therefore, by switching on "recirculate," the relatively stable flow of fresh air is halted, resulting in CO2 accumulation.
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Any references or articles that describe that accurately.
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By 2040 it is estimated that the world’s energy consumption will increase by almost 50% [1]. The development of electric vehicles such as hybrid electric vehicles (HEVs), battery electric vehicles (BEVs) and fuel cell electric vehicles (FCEVs) is ramping up at differing rates. Several electric vehicles are already in the market, developed by companies such as Toyota, Honda, BMW, Chevrolet and Mitsubishi.
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Hello,
I am Ali who is Race Car Vehicle Dynamics enthusiastic. I want to make a Vehicle Model on Simulink. However, I have a lot of questions to begin it. Firstly, I do not have a idea about which outputs I can get and how to interprate them. Secondly, I do not have an idea about how to start.
Any words you may say will help me.
Thanks in advance.
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A good point to start is to check the documentation for those official Simulink vehicle dynamics models:
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Such a system can mean less volume of cars in large cities, which can free up parking spaces and facilitate traffic.
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Dear Dr. Aref. Thanks a lot for the articles.
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I need to transport leaf samples from an experimental site back to my lab, a four hour drive away. I'm aware that freezing with liquid nitrogen or dry ice isn't safe for driving, is there another option which would prevent degradation of the samples until I can get them in a freezer at the lab. I want to do pigment extractions and antioxidant capacity.
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Dear Dr. Anna Jones ,
I suggest you to have a look at the following, interesting references:
- Instructions for Taking Samples for Plant Analysis
My best regards, Amir Beketov.
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I am doing traffic simulation of roundabout in Vissim. During simulation some cars wait or stop longer at the start of conflict areas inside roundabout even they have space to move. What is the reason? (its a non lane based)
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Dear Dr. Ayesha Hakim ,
I suggest you to have a look at the following, interesting video:
- Dublin Roundabout Simulation
My best regards, Amir Beketov.
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Greetings !
respected dear i am working to a novel design of wet cooling tower for my final year project as B.E requirement.
I am confused about that if i use cars radiator instate of air to Air tube heat exchanger at the top of the tower ?
kindly help me and guide me , what will be results if i use car's radiator instate of air to air tube heat exchanger ? it would increase the efficiency of wet cooling tower or may decrease ?
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Dear Khalid! yes you may able to use such radiators, however, consider thermal efficiency (as it might ought to loss). Perhaps, Varying the parameters to optimal state could help!
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Could you help me to find articles on topical on hardware and software implementations of collision warning block(unit) for cars?
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You can use ultrasound transducers to measure the distance between the adjacent cars. You send a pulse and receive it after back bouncing from the adjacent car. The time delay between the two pulses is equal double the distance between the two cars. If the distance is smaller than a critical distance then alarm will be launched.
For more details about the building of the system please follow the paper in the link:
You may find similar papers by searching the web.
Best wishes
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I need the Data Collection methods available to estimate the demand for curb pickup/drop-off zone, bicycle parking facilities, and car parking at a particular station.
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The best way to collect such data is to use questionnaire and interview methods. Also, in the current situation, it is preferable to use an online forms.
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I want to do some research on the application layer in VANET. Precisely, I need the real-time location(the information of gps) about the car. I also need the car and RSU have some power to run algorithm. Which simulation software can help me to finish the experiment?
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veins is ok. you can ns3 simulator aswell
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To be more specific, my report comprises three main subsections, such as the economic outputs, the environmental issues and the social influence.
Any tips for each subsection are welcome, thank you!
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Felicia Panfil I know your title is car-free, but why would you exclude all the new electric vehicles including automobiles and delivery vehicles? Logistically any city needs an enormous infrastructure just for food which you can't pipe in nor use only pushcarts. Most public transportation is ill-equipped to deliver goods, but perhaps that could be part of your contribution. Certainly, some food production in the metropolis is a concept to take into consideration. In addition, the is the almost sci-fi idea of Elon Musk's tunnels for electric vehicles because building underground has become so cheap. I await your plans for a city of the future with impatience.
Prof. YUKNA
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Hello Friends, I want to calculate deep thermal mass of my car for the Air conditioning system design...... I need to find the exact DTM, Please help me to compute this one
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In my opinion, hydrogen fuel cell technology and electromobility should become economical and safe in the future. However, currently hydrogen production is not cheap. The storage of hydrogen, e.g. in cylinders in cars that would be fueled by this fuel, is associated with a high risk of a dangerous explosion. Space shuttles in space programs in the USA were fueled by hydrogen-oxygen fuel. However, there have been tragic catastrophes.
Please, answer, comments. I invite you to the discussion.
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Many special thanks Prof. Dariusz Prokopowicz for your question! The great reset of energy resources began with the Paris Agreement to which the vast majority of states have acceded, and agreeing to revise their energy strategies at the national level. Along with wind energy, solar energy, hydro energy, hydrogen-based energy seems to be at least now one of the resources optimized by the human factor and can be controlled by the human factor in the production process. Moreover, being a green energy, it agrees with the two Agreements, namely the European Green Agreement 2050 and the UN Green Agreement 2050, which is why it also supports a predictability in the strategic direction of action of any state. Accidents will definitely be part of the process as well. But starting from the personal motto feel-think - act and these types of green energies I appreciate that they must be treated in a balance.
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I am working on my masters degree dissertation but i am finding it hard to run a BYM CAR model (S.CARbym) in r on my data.and get the random effects and matrix of covariates..i have attached my data.. The shapefile and dataframe.
I would like to also get the codes that you may have used.
May God bless you
Luttamaguzi Abdul Noor
Fisheries Officer
Luwero District Local Government,
P.0.BOx 78 Luwero, UGANDA
+256703821440
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Thank you so much sir @Rolando Gonzales
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For my MSc final dissertation, I am doing efficient lightweight composites for car seatback. For this, I choose Flax, Glass and carbon. Thank you for your valuable time.
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Hello everyone,
I am currently trying to understand CAR-T´s mechanisms of action, but got stuck at a certain aspect.
2nd gen. CAR´s upwards require co-stimulation of e.g. intracellular CD28 domain to support T-cell proliferation and persistence. What I dont understand: How is the CD28 domain stimulated?
The CD80 of the target cell cannot bind directly to it, since the CD28 costimulating domain is intracellular. Is it activated along with an antigen binding to the CAR?
Looking forward to your response.
Regards,
Matthias
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Dear Matthias,
All the ligand-receptor bindings are not just bindings, tow examples for the typical consequences of the binding, one is multimerization, like TCR engagement, the other one is to recruit other molecules for splicing, like Notch signaling.
The transmembrane domains are often ignored, but as in TCR signaling events, they are quite significant for multimerization. Sole TCR would never work, they need to be clustered together to deliver the signals.
So for your questions, the CAR structure always compose an extracellular domain, a TM domain, and an ICD. The ECD, like anti-CD19 scfv, or others, is responsible for binding, and then clustered, then the signaling of CD28, amplified, and delivered.
I can't put a reference here, but I would suggest a key term for your retrieval: TCR signaling and clustering.@Matthias Müller
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is there any research that we can know(calculate), actual moved distance of Vehicles in University campus ?..
for example, a university campus has 3 main gate and Total Vehichles entering this there gate are 10000 per year.. so how we can calcualte (or is there any meam distance) actual moved distances of these 10000 cars inside the campus ?
it's related with Carbon footprint of these vehicles..
Please let me know if anyone have ever met any articles like this.. thank you
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Yes database can record entry and exit information for all all car plate number @Chris Joseph Abraham
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"THIS IS AN ABSOLUTELY SCIENTIFIC QUESTION"
The human being's passion for automobiles is something incredible, but also complicated.
There are countless reasons to make a human being like a car, nor do I intend to discuss here what each one likes most. This passion for car almost always does not let us see clearly and rationally use and acquisition of a vehicle.
However, several studies show that vehicle is almost always underused for its intended purpose, which is actually walking and transporting. Almost your time is spent just standing still and parked (see figure).
Tell us, after seeing figure, in your scientific opinion if shape we have chosen is really useful?
PLEASE ANSWER IN ENGLISH ONLY.
VERY IMPORTANT: Participate only if you are original, be yourself give your opinion, do not put links or texts from "Genio Google" or things found out there on the web! No one has any interest in stupid web answers, if that's the case, please be so kind as to ignore this debate! Also, don't post your hurts and hates, and don't deviate from the subject at hand, thanks.
SOURCE LINK:
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In the future, by changing the public transport techs and types fundamentall, maybe using the vehicles will decrease.
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The future of urban transportation lies in mobility-friendly networks in which cars are just one element shrinking one as we move from a system in which the personally owned vehicle is king and toward a multimodal future of on-demand driverless vehicles, ride-sharing, expanded public transit, greater reliance on human-powered transportation and other alternatives.
How can I master on such matter?
#Urban #Transportation #Multimodal #Future #lies #mobilityfriendly #networks #shrinking #vehicle #ridesharing #padroneggiare #futuro #multimodale #trasporto #urbano #Randieri #Intellisystem #IntellisystemTechnologies
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I propose the following research topic on this issue. Analysis of determinants and trends of pro-environmental changes in the development of public transport in cities and their use by citizens. These studies can take into account pro-environmental factors and sustainable development goals, which will cause a decrease in the use of passenger cars and an increase in the use of vehicles by public transport and other alternative solutions, such as the use of bicycles or resignation from commuting by increasing the scale of professional work in the form of remote in urban agglomerations.
Best wishes,
Dariusz Prokopowicz
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It is much appreciated that you took the time to read this. The Questionnaire relates to my dissertation for my master's degree. The topic of my dissertation is Sustainable composites for car seats. I would like to ask you to contribute to this primary research survey. My research would benefit from your contribution. I appreciate your help
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Mr. Shubham Patil - following up from your PM "ok" for feedback, attached is: Feedback Re: Survey: Car Seats Composed of Composite Materials by Shubham Patil
Please note: all my comments are made with good intentions and offered to be constructive and collaborative, not to be nit-picky or critical. Surveys are often used but less-often rigorously designed. Time spent in planning and revising before deployment will make the analysis and incorporation of the survey into you dissertation much easier. Here are some points I would suggest you examine.
· Title: the title should at least hint at the survey purpose
· Target audience: Who is the target audience and how will you screen / eliminate outlier responses?
· What is the purpose of the survey? [solicit opinions, determine familiarity? Some questions seem to elicit ‘opinion’ information on nebulous items such a positive or efficient development, others seems to be looking at the ‘popularity’ of composite matrix methods.]
· Survey design: what is the basis /methodology of the design? How were questions chosen? What is the rationale for the choice of a Likert scale and how are you handling the null option?
o The employment question needs an n/a option.
o Item stems should lead with the target of discrimination, not instructions like the stem phrase: “Do you agree
*“Do you agree” is a “yes/no” trigger. Try to use standard neutral phrasing. like “To what extent.” (Questions 2-5 could be offset as a sub-set of itmes with one generic instruction)
o The last item: “Any recommendation” is too open ended. With text input items you must decide what kind of text and how much of it you want AND how you are going to parse and process that text into manageable data.
· What are the two opening options for? Are they to separate respondents with experience from respondents with no experience? [like myself]? Both lead to the same url.
· Delimiting of topic: “car seats” [Why only “seats” and not other fabric covered items? Why only exclusive “car” instead of inclusive “automobile” / “motor vehicle” / “vehicle” to encompass all manner of cars, trucks, etc.
· Delimiting: flax fiber composites? What about other bast fiber composites or other non-bast non-wood natural leaf, seed, straw, and grass composites?
· Optional note: you use British English spelling: fibre / fiber behaviour / behavior]]
· Unclear: “glass fibre is obtained from several fine fibres of glass.” [obtained or manufactured?] [made from molten silica (SiO2) glass ”sand” and a chemical binder]
· Usage:
o avoid unneeded capitalization: textile/Composite ; 1 Year; Flax composites; Glass-fiber composite; seat, Which ; final Dissertation; Bending of material and Damping
o use capitalization: Msc [caps: MSc / M.Sc.]; Textile Design, Technology and innovation [cap: Innovation]; De Montfort university leicester [cap and comma: University, Leicester: Textile Design, Technology and Innovation MSc, De Montfort University (DMU), Leicester, UK
o plural / SV agreement: any question [questions]; For car seat[s]; for car seat developments [development]; natural materials contributes [contribute]; that Bending of material and Damping behaviour [behaviours]; will be use [used] in a thesis
o spelling / unclear: high-end car set [do you mean seat? What do you mean by "high-end"]
o unclear: that the combination [of?] natural materials
o check: manageability of materials from breaking easily [awkward]
o precision: Textile Design, Technology and Innovation module [delete: module and use program/ stream?] at De Montfort university leicester [cap: Leicester. [Textile Design, Technology and Innovation MSc, De Montfort University (DMU), Leicester, UK]
o Minor: Name: repeated:
Shubham Patil
Shubham Patil
o Minor "The study mainly concentrates" [a tad superfluous/redundant]
o Unclear: The chapter focuses [what chapter?]
o Consider: used for retaining sustainability [consider: sustainable materials management (SMM)]
o Unclear: Flax fibre ... is required [required by whom, for what?]
o Unclear: for preparing [preparing or producing?] car seats.
o Tense: This study has deal [probably: will deal; possibly: has dealt] with
o Word missing? techniques of composite and manufacturing [word needed like: composite design and manufacturing OR delete: and]
o Bracket parenthesis missing after “thesis.” ...may be [published... a dissertation / thesis.
o Comma: if I am being interviewed, [comma] this data
o Ambiguous: I agree to be contacted by the researcher named above [there is no researcher “above” - the name is given on the previous screen]
o Awkward: For how long have you been employed within textile/composite field? [How long have you been... delete “for”]
Note: this question has no zero option and “employed” precludes researchers who have been employed in other fields or who may have may have explored this field in an unpaid situation.
· General:
o “flax composite” is a vague and generic term. Consider something more technically exact like: flax fiber (or thermoplastic) starch based composites / flax fiber-reinforced composites / natural fiber reinforced thermoset composites
o Flax is known variously in English as linseed or flax plant. Consider adding the taxonomic: (Linum usitatissimum L.)
· Tangential:
o Some respondents may be more familiar with resin-based terms like bast fiber thermosetting polymers / matrices
o Some respondents may be more familiar with natural fiber bast composite manufacturing techniques than with the materials (thermoplastic: compounding, mixing, extrusion, injection molding, and compression molding (CM) ( thermoset: liquid composite molding (LCM), resin transfer molding (RTM), vacuum infusion (VI), injection compression molding (ICM), sheet molding, pultrusion, reaction injection molding, and bulk molding
Cheers,
Leo
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A car with known speed negotiating a curve with negligible super elevation, all the vehicular characteristics are known. now can we calculate how much it will shift towards the outer edge while taking the curve with a speed of 80 kmph?
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Thanks Dhrubajyoti for asking this excellent question. Unfortunately, I am not an expert in this field. However, I believe that these journal paper may provide you with some useful knowledge. The links are:
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It has been established through researches that accidents do frequently occur when taking calls in driving. The accidents rate occurrence is low while the driver is listening to music or getting engage in discussion while driving.
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Yes I agree. We need to dig deep into numerous theories of attention.
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Will the development of autonomous cars be correlated with the development of electric cars?
Will these technologies be developed in parallel?
In the future, will a significant part of autonomous cars also be electric cars?
Please reply
I invite you to the discussion
Thank you very much
Best wishes
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Dear James Marson,
Thanks for the positive assessment of this discussion on the development of autonomous motor vehicle technology in the potential synergy of development with electromobility. Thanks for your comment. I agree with your view on this topic.
Regards,
Dariusz Prokopowicz
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The immediately answer without too much thinking would possibly be: Yes, we need them, because not all criteria have the same importance, and this is true.
Fine, now what are criteria weights? They are subjective transcriptions of verbal ordinal expressions, also subjective. Analyzing this step, one realizes that they are totally arbitrary, and in addition, subject to the decision of a DM, which may be different from that of another DM,
Really, a very suspicious procedure and with no mathematical support.
We agree that weights are used to have a rank of criteria according to their relative importance. And now, the crucial question comes, ‘Importance relative to what?
If you analyze a fact such as for instance, the relative importance of quality and price regarding the purchase of a car, you can legitimately say, that in this respect, and for YOU, quality is more important, without assigning a quantitative value to that preference, because it would be meaningless. Nobody can put a value to a feeling or a preference.
Observe, and this is important, that your preference must be related to something, in this case the car, because in other aspects you may prefer price to quality, according to your tastes and budget, for instance, in purchasing a necktie, and thus, it depends on the object of the comparison.
In case of criteria weights in MCDM, a practitioner may express these two postulates:
1) Weights are necessary to evaluate alternatives,
2) Due to the fact that not all criteria have the same importance.
Is this answer correct? NOT in the first statement, and YES in the second.
The reason of the fallacy of the first statement, is that the relative importance between criteria is NOT associated with alternatives evaluation, unless they are objective weights derived from entropy.
Probably you will say: But these entropy weights also establish a ranking between criteria, as subjective weights do, then, why the evaluation of alternatives is valid for entropy and not from preferences?
Because Shannon Theorem, the base for Information Technology, as we know it today, demonstrates that to evaluate something you must have capacity for evaluation, you need a certain quantity of information, and it depends on the discrimination of the values of a criterion that is, it is an attribute. As an analogy, the actual system is equivalent to asking a 5 years old child to evaluate different cars.
He/she, at that age, does not have on cars the amount of information that an adult possesses.
This amount of information in a criterion can be found by entropy; this is the great discovery of Shannon, and he even developed a formula to compute it.
If in a criterion the different values corresponding to the alternatives are very similar or close, the entropy or uncertainty is high, the quantity of information low, and thus, this criterion has a low significance for evaluating alternatives.
The best example are dice. The uncertainty about which number will appear when casting, is 100%, because all of them have the same values (1/6); the entropy will be 1, and the quantity of information 0.
Since weighting does not have this property, it can’t be used for evaluation.
Therefore, why to spend thousands of hours trying to find out how to have better subjective weights, when they are useless, at least for MCDM?
I am not claiming that I am right but at least is what I get based on reasoning and science.
Therefore, if subjective weights are inappropriate to evaluate alternatives, why are we using them?
I would very much like if some of my colleagues in RG can add something else, supporting or not, my arguments. As a bottom line, I believe that weights, other that entropy ones, should not be used in MCDM methods. I am not saying that we should consider all criteria with the same importance, because it is not true most of the times, thus, we should use either entropy weights, or allow the method determine by itself the importance of each criterion, based on inputted data, as is done in Linear Programming.
I will be more than glad to discuss this issue, but please, with arguments, not with simple words or masking references about other authors wrote.
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ATA: This is a warning. it is off-topic to post where you are posting, which is traceable and against RG ToS. I ask you to delete what actually works as anti-social, and as an anti-advertising for you. Then, I will also delete this warning.
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I am studying the potential impact of Shale oil exploration and electric car invention on the future of Nigerian economy. I want to know how to merge data on Shale oil production (in barrels) with the number of manufactured electric cars (in numbers) to arrive at one variable.
Thank you in advance, for kind assistance.
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I think these could help you;
  • Future vision of shale oil and shale gas, December 2019, Conference: 8th International Conference on Chemical Science and Engineering
  • Electric Vehicle Impact on the Oil Sands, June 2020
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Electric cars have been introduced world wide with the idea that there will be some decrease in carbon footprints along with decrease in air pollution. But we have to charge an electric car on regular basis. From where that energy will come, is a big question. Some countries have hydel power generation, and some have thermal energy, the other may have solar also.
Second question is about water, air and soil pollution? If we shifted from air pollution to water and/or soil pollution, we have the ability to handle such mega scale pollutions?
In the light of the above, what is your analysis and views?
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Hi. Mainly yes.
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I would like to raise this question to the scientific community. Please provide your opinion and your arguments.
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Hi. Renewable energy resources as biofuel is good but if the electrical car use water as a fuel will be better . Electrical cell used to make electrolysis for water to produce hydrogen then the produced hydrogen is input for fuel cell to produce electrivcty and oxygen .
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Hello, I would like to ask you about a reagent that could remove this car oil stain that has set for years from the paver parking(see picture attached). I have tried scrubbing using liquid soap, Butyl glycol (2-Butoxyethanol), IPA, Hydrogen peroxide, A poultice with acetone overnight... even HCL but none of the above has worked.
Does anyone please have any solution?
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If it is a fresh oil stain in the pavement area then you can possibly go for sprinkling the baking soda on top of it and rinse it away with your hose mam. I am not sure about the long lasting stains mam.
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What is the average weight of Indian vehicles i.e. Motor cycle, Car, auto rickshaw, etc.,.
Where can I access this data?
Is ARAI providing this data?
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Average weight of Car in India is around 1030 Kg
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We want to create a PR and communication campaign that the government will use to motivate the public to use public transport instead of privately owned cars in peoples´ daily lives. We want to persuade undecided people who can use both public transport and cars to use public transport more often, especially when both means of transport are of comparable quality and equally accessible. We will create a questionnaire survey where we will access the perception and behavior of the public towards transport choice. Do you have any suggestions on how could we link it to a communication strategy and campaign that will follow after that?
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There are many ways by which the govt can motivate few being the ones I have listed below for your reference:
1. It is cleaner for environment and thus beneficial to the entire world and saving the environment
2. It is in quite a high demand and is located in prime areas so the main roads and districts or highways are sure bet and specially if there are large or important districts that need to be connected from one spot to another.
3. Easy to read transportation map and time tables to be displayed which enables easy movement too
4. Stops to be easily accessible and visible and to be clean hygeince and attractive
5. Transport medium should be cheap and affordable for any lower middle class as well as poor people and ofcourse the service needs to be very good in that affordable pricing.
6. Ensuring the population or the maximum number of people are using the transportation which fetches revenue and cleaner and greener environment too
7. Governemnt services should be attractive and recognisable like the ones they offer in private services and then the people can see the difference and can join in easily.
Hope so this answers most of your question thanks and stay connected for more
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I am writing a study paper on a topic E-cars crash and accidents, especially when they start to burn and how those crashes are handled. Any researches in English or German will be helpful.
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Very helpful Wikipedia page on electric vehicle fires https://en.wikipedia.org/wiki/Plug-in_electric_vehicle_fire_incidents