Transport - Science topic

100 large internal combustion transport ships emit as much CO2 as a million internal combustion cars. Transport ships are already being built that are equipped with alternative, lower- or zero-emission energy sources and modern sails, in addition to high-emission internal combustion power. Unfortunately, power supply based solely or mainly on such emission-free energy sources such as solar energy based on installed photovoltaic panels is currently used only on small ships, catamarans, boats, etc. On large transport ships, both passenger and cargo ships, this type of power supply can be a supplementary power supply to provide the ship with electricity used in some of the on-board equipment. Besides, technologies are being developed to power transport ships with low-carbon biofuels, nuclear or hydrogen power. However, regardless of the type of power supply used to generate electricity and/or energy to power the engines that drive the ship's turbines, it is almost always also possible to use modern sailing structures, which will be an additional source of energy based on the most traditional source of energy that enables the movement of sea vessels, which is wind energy. In addition, modern sails can also be covered with photovoltaic panels, so they can also significantly increase the area on which the said panels are installed and thus will also be a source of electricity.

In view of the above, I address the following question to the esteemed community of scientists and researchers:

And what is your opinion on this topic?

And what is your opinion about it?

Please answer,

I invite everyone to join the discussion,

Thank you very much,

Best regards,

Dariusz Prokopowicz

Extended Abstract Submission Deadline – 30th April 2023

Submission Link: https://cmt3.research.microsoft.com/R4TLI2023

The Sri Lanka Society of Transport and Logistics (SLSTL) is organizing the 8th International Conference on Research for Transport and Logistics Industry (R4TLI) 2023, which is scheduled to be held on the 26th of August 2023 in Colombo, Sri Lanka both onsite and virtually.

R4TLI is an initiative that endeavors to promote Research and Development in the Transport and Logistics Industry in Sri Lanka, and in the Asian region helping diagnose its current issues, experienced by the industry and identify potential improvements and sustainable solutions, based on scientific evidence. This annual research conference intends to build a platform for effective dialogue among academics and professionals in the fields, and for showcasing of research outputs and dissemination of new knowledge developed in this regard.

We encourage all of you, academics and professionals interested in the research and development of the transport and logistics industry to join us by submitting Extended Abstracts (the extended abstracts template is attached herewith) on your authentic research, in view of presenting them at the conference and subsequently publishing them in the R4TLI Proceedings. (For past proceedings visit “PUBLICATIONS” menu at www.slstl.lk)

The selected Extended Abstracts will be invited to submit the full paper for the Journal of South Asian Logistics and Transport (JSALT) which is a peer-reviewed fully open-access Journal of the Sri Lanka Society of Transport and Logistics, Moratuwa, Sri Lanka and published by SLJOL (https://jsalt.sljol.info/)

in corves and transport tanks

Are there published scientifically robust data that dealt with the topic, yet?

Many people live in urban agglomerations, in large or small towns or in the countryside.

If you function in a city, I address the following question to you:

Please reply,

Thank you very much,

Greetings,

Dariusz Prokopowicz

As you know, there is several standards for oxidized bitumen specification, ( e.g. performance grade , viscosity grade , penetration grade). Now I want to access china bitumen standards. Thanks all

Will sailing ships make a comeback? There are already sailing ships being built that are also powered by electricity from photovoltaic panels. Will transport ships under green transport technology also be powered by electricity from photovoltaic panels? But will nuclear or engine-based technologies powered by burning hydrogen in oxygen become dominant?

What is your opinion on this?

What do you think about this topic?

Please reply,

I invite you all to discuss,

Thank you very much,

Regards,

Dariusz Prokopowicz

I am PhD student in transportation sciences.

I deal with the application of machine learning to solve transport problems. Examples:

Works using:

Machine learning is not my primary discipline (it is <2 years in ML, 8 <years with transport and logistic)

What is the appropriate and recommended place for a scientific internship in machine learning?

If you have a sample of Transport Vision Statement, please send me.

Thanks so much

In non-local measurements, we apply current between two leads and measure voltage on different leads away from the current leads. to calculate resistance, do we need to divide the non-local voltage by current - as such current is not flowing through the voltage leads?

can you please suggest good literature on non-local measurements?

Thanks

Need some suggestions for good journals in the transport research/ transport dynamics area (particularly about transport emission models) that publishes an SLR or bibliometric analysis paper. Please suggest some journals with no or low APC.

Is there a relationship between roads and slums forming?

I hope everyone is safe and healthy.

The purpose of this survey is to study travel behavior during COVID-19. It does not ask for any personal information and will take about 10 - 15 minutes.

Your response will be highly appreciated.

Edit: Thanks everyone for your responses. They survey is now closed.

Dear All, within our new European project SYN+AIR related with the air transport we are executing an online survey which aims at identifing the mobility choices related to and from the airport. We are glad to invite you fill in the survey https://ec.europa.eu/eusurvey/runner/SYN_AIR_Traveller_Survey_2021 The questionnaire is available in 5 languages (English, Greek, Spanish, Italian, Serbian) and lasts approximately 10 minutes. All adults that travel or used to travel by plane (before the Covid-19 pandemics) can answer this survey. You may find information related to the project at http://syn-air.eu/

Please, feel free to share/disseminate this request. Thanks a lot for your attention and contribution. #SESAR #H2020 #SYN+AIR

As per a latest report, 22 of world’s 30 most polluted cities are in India. What strategies need to be adopted to bring down this number to say half (11) in the fastest possible timeframe.

For example, strategy could be like stopping all new construction activity within the polluting city, shifting all no strategic offices to rural areas, fixing the allowed population density per unit area, shifting of airport traffic etc.......Please give suggestions in this context.

We have seen a stability in the supply chains of goods, food in particular, during the current pandemic of Covid19 continue, mostly undisturbed.

It is very reassuring at a time of uncertainty and macro-risks falling onto societies.

How much do we owe to the optimised management and supervision of Container transport, and multimodal support to it with deep sea vessels, harbour feeder vessels, trains and trucks/lorries?

What is the granularity involved? Hub to hub, regional distribution, local delivery?

Do we think that the connectivity models with matrices, modelling the transport connections, the flows per category (passengers, freight, within freight: categories of goods), could benefit from a synthetic model agreggation of a single matrix of set federating what has been so far spread over several separate matrices of numbers?

What do you think?

Below references on container transport, and on matrices of sets

How to find out the trapping phenomenon for peristaltic transport of non-Newtonian Herschel bulkley model

Hello, colleagues,

Planners and researchers in the area of transportation could help me answer this question. My research project is about Park and Ride (P&R), which is a modal shift point from private vehicles to public transport. This means that a percentage of the trip is made by private vehicles, parking the vehicle, and transferring to public transport to reach the destination. My goal is to simulate all this under traffic conditions. I would like to know what simulation software and possible results I could obtain by simulating this system, known as P&R. What is important to simulate: time, distance, utility functions, public transport timetable, P&R demand. Your contribution is a great help in the project that I' m doing.

I start working on research about international air transportation and the spread of COVID-19, and I need urgently the network of global Airlines.

Although life has gradually returned to normal, many people are still concerned about the use of public transportation and aircraft. Are public transport and airplanes really the biggest means of transmitting the COVID 19 virus?

I want to explore daily passenger volume at railway stations in the selected region.

Should I take into account the number of people getting on the train or getting off the train? Maybe the sum of passenger getting on and getting off the train at particular railway station? Is this correct in this case? I will count double passengers who commute to work and come back from work in the same day. Maybe the average number of passenger getting on and getting off the train?

Best regards,

Wojciech Jurkowski

Hello,

Is there a reference where can I study the step-by-step derivation of the two-group interfacial area transport equation by Ishii?

Thank you,

EB

I am looking to characterise both the transport systems (e.g. public transport networks, road networks, costs of travel, service reliability, etc.) and land system (e.g. urban density, land use, urban form), in any way possible at a national level. Naturally this will be very high level.

Is anyone aware of such type of metrics?

Could anyone tell me that where can I find an analytical solution of diffusion equation (PDE) with 1D zero flux boundary at outlet? I need this for calculating rock permeability from pressure diffusion.

I have found there are some literatures giving solution in a semi-inifinite domain. What I want to get is an analytical solution in a finite domain with at x=0, c =C0 and at x =L, flux = 0.

Thank you.

Several simulation studies show that the MCNP code fails when dealing with detailed physics at nanometric level (e.g., when modeling B4C nanoparticles in neutron shielding materials).

Hi experts,

I wonder if there is a possibility to seal well plates for cell culture in a sterile environment in way that liquids can remain in the well plates? Something like vacuum packaging where the lid is packed separately?

We have a hydrogel which should not dry out and ideally is immersed in buffer all the time. Now, we cannot transport the well plates far, since there's leaking of the liquid from the plates if tilted.

Sterility must be maintained.

Thank you very much!

Hello,

I am currently researching the RoRo market in Norway. Looking for any information regarding market - competitors, analysis, trends, routes and so on.

If anyone could support I would feel extremely obliged.

Thanks,

Jedrzej Tadrzak

I first state that my domain of interest lies in the understanding of distances in the spatial, geographical domain. This does not involve distances in statistical non-spatial analysis.

Distances in the mathematical sense are characterised by the properties of positivity, separation, symmetry and triangular inequality. In the literature this last property is often wrongly interpreted. I state the hypothesis that the triangular inequality (d(AC) <= d(AB) + d(BC) whatever B) has for main purpose to guarantee the minimal nature of distances. I have so far listed three errors:

1. confusion with with the non-euclidean nature of geographical distances : the fact that distances are not following the straight line is accounted for triangular inequality as in Müller 1982 ("Non-Euclidean geographic spaces: mapping functional distances" Geographical Analysis vol 14). This is clearly a misunderstanding of the non euclidean nature of the transport and mobility realities.

2. considering non-optimal sets of measures (the word "measure" is used to avoid considering them as distances) containing triangular inequalities as in Haggett 2001 p 341 ("Geography a global synthesis" Prentice Hall). This argument is not consistent with the idea of minimality that I mentioned earlier: what can be a sub-optimal distance? Does it exist in spatial analysis of transport such distances?

3. the existence of rest-stops along transport routes creates the possibility that the additivity of time-distances (for instance) is not guaranteed. On the optimal route from A to C passing through B, if there is a need for a stop (for rest, for energy refuelling or other similar purposes) in or around the point B then the addition of time-distances AB and BC is inferior to the overall AC distance creating an apparent violation of the triangle inequality. This idea can be found in the reference article Huriot, Smith and Thisse 1989 "Minimum cost distances in Spatial Analysis", Geographical Analysis, p 300. This argument could be surpassed by using a non-continuous time-distance function to overcome the sub-additivity paradox.

All this discussion brings to the idea that distances are optimal in nature, and that in the spatial analysis of transport and mobility, the concept of distance contains an idea of optimality. This idea could link geography and economics through the principle of optimisation in the distribution of activities and the functioning of transport systems.

I would like to open here a discussion to test if my reasoning is consistent and solid: I welcome any counter arguments, examples, illustrations.

Hello,

I will need to implement Transport Mode Detection (TMD) on a smartphone accelerometers, gps, etc. in order to detect if the user is traveling on foot, on bicycle, by car, by bus, etc. Here are my two questions:

1) Is there some public data available to train and benchmark algorithms for this task?

2) Is there some commercially usable libraries/services implementing TMD? Something under MIT licence would be great but commercial solutions could also work.

Thanks for your time,

Bruno

NB: Something like

One of the most important parts of my project is the recognition of other countries' successful logistics experiences. In this regard, one of the most important issues is the achievement of reference models and business processes for logistics and transportation. The process flow diagrams are in the form of BPMN standards. Can you guide me in this regard?

In the case of gas transport through microporous membranes (e.g. silica membranes), there is a temperature dependency behavior which affects the membrane performance at high temperatures. We know that it happens when kinetic diameter of the molecule approaches the pore diameter. I have read somewhere that LJ potential might plays big role in this.

Could anyone provide some information, text books or researches containing detailed description of this phenomenon?

How can I check if greater levels of accessibility inevitably result in greater participation in activities or more mobility?

What methodology can I use? What are the most appropriate accessibility measures?

I am developing my thesis on social exclusion and social justice related to transport. I would like to do some spatial analysis comparing socioeconomic and demographic data with travel behavior.

I intend to do this using the R programming language. Also, my knowledge of statistics is a bit out of date. Can you recommend an online course where I can learn spatial statistics using R programming?

I am currently conducting research (my master thesis) on social justice and social exclusion related to transport. My research hypothesis is whether greater levels of accessibility inevitably result in greater participation in activities or more mobility.

In this way, I would like to read articles that have already studied this relationship.

An article I found on the subject is

"Fransen, K., Farber, S., Deruyter, G., & De Maeyer, P. (2018) The spatio-temporal accessibility measure for modeling activity participation in discretionary activities. . "

Could you suggest me more papers on the subject?

Hello fellows,

I'm planning to import a cell line (frozen vials on dry ice) from USA to Poland does anybody have experience / knowledge about courier company which will cost less than Fed Ex, TNT and World Courier (their service prices are much bigger than cell line cost)?

Thanks in advance

I'm exploring non linear modelling technique for demand forecasting in transportation sector where alternative transport mode implement.

As a start it is good to have some ideas from you

Thank you

How much the size of spatial area affects traffic generation within the area and the resulting traffic volumes in the relevant city (public transport or individual transport)?

Is there any method of theoretical approach how to describe this issue?

Transit Oriented Development areas are located within radious of one 1/4 to 1/2 mile (400-800 m) What do you think what is the optimal distance from housing development to railway station? What is the difference between urban and rural areas?

Best Regards,

Wojciech Jurkowski

"It is a world trend that digital economy is merging with real economy. Through the use of digital technologies, investments and innovations take place in the fields of smart grids, self-driving vehicles, e-government, advanced manufacturing, etc. Our question whether there is any general or formalised technology which could be equally used in various fields, and which could help to achieve digitalisation in everyday life, also in the transportation."

When performing transport calculations using Transiesta and Tbtrans modules in Siesta, transmission curve is directly given by plotting .TRANS file with E(fermi) = 0 eV? or do we need to do energy shift to balance the fermi energy of electrodes with that of scattering region ?

Can anyone give reference procedure or an illustrative example for the estimation of OD Demand matrices through CUBE.

Probably they are estimated through extension CUBE Analyst/Analyst Drive.

Input Data available to me: A prior yearly OD matrix & Traffic Counts (Not Average values)

And lastly, how are the results of output matrix. Are the results reliable and statistically significant?

i think it is interesting if we can go anywhere in a second . do you have any idea about how we can do it?

I have average speeds data for different road section & I would like to build an O/D matrix from it. Firstly, I need to build a relationship of speed & flow to compute flow and then to do OD estimation by using traffic counts (inverse assignment).

If anyone is familiar with the procedure. Please guide

It was seen that when magnetization is in the direction of current flow, resistance is minimum and vice versa. Why resistance increases when spins are aligned and why it decreases when spins are aligned in perpendicular to current direction. According to me it should be opposite.

Any idea/suggestion about using molecular dynamics simulation about transport and geomechanical fate of proppants?

To whomever is considering answering,

I am currently running a modified icoFoam (added tracer transport) application in parallel on two of my computer's processors. I am coming across crash issues sometimes, where mpirun suddenly crashes with no error report whatsoever. This doesn't always happen, but what seems like out of nowhere, the application sometimes fails. It just stops at an random time step.

I would expect that if it is a memory error, an error report would appear as it is a standard issue with applications.

If you have come across this issue, please let me know what you did in circumventing this annoying issue.

Thanks in advance.

I think if we block the porins or TonB-dependent transporters? of bacteria and prevent them from transporting important compounds, we can destroy them. I appreciate if you share your experience.

I would like to medelize heat and moisture transfer throw soils from building ground level. What physics should i use for it ?

Dear Researcher,

I am willing to perform Spectrum Analysis of a Transport tool and I was wondering weither a Shock Signal in the time domain can be transformed to a PSD in the frequency domain by means of Finite Fourier Transform or not?

So given an amplitude of 10g over 11ms (Sock Signal in the time domain) and I wanna transfere it in the frequency domain to obtain the input PSD for Response Spectrum Analysis.

So, x(t) ist given over a finite time interval 0<t<T with an amplitude of:

X(f,T)=Real (int(x(t)*exp(--i*2*PI*f*t) dt))

then the Amplitude in the frequency domain can be determined using:

G(f,t)=2/T (abs(X(f,T)))

Best regards

Mohamed

Redundancy is often considered as one of the features for resilience assessment.

What are the possibilities (or how) to incorporated this feature into the transportation network resilience analysis and assessment. The similar question can be asked for the transportation element only. Are there differences?

Thank you very much for your ideas and opinions.

it is not true that in-plane momentum needs to be conserved. As there is a scattering region, the momentum along the direction of transport is no longer a good quantum number.

what mean's "a good quantum number"?

I will take a nasal samples for to search Bacteriophages, but i whant to take a aliquot that for a future to realize metagenomics studies, which the better method for to take this samples. The universal virus Transport medium inhibe the bacterial grow by the antibiotics present, which other buffers or transport medium can server?

What kind of position accuracy measures do you use to determine the positioning accuracy of GNSS receivers?

Dear colleagues!

I have some questions about modelling and predicting freight and passenger flows, calculation transport-economical freight and passenger balances and evaluation of transport infrastructure capacity in China. Do you know someone who makes researches in these fields?

Thank you in advance.

Hello everyone.

i want to isolate and culture bacteria from infected non vital teeth. predominantly the anaerobes are responsible for the primary infection.

my question is can i use BHI media for transporting the sample to lab and for incubation in lab?

after incubation aerobic + anaerobic in BHI for 24 and 48 hr respectively the samples will be further processed on enriched media.

Mcconkey , chocoalte and blood agar.

Different smartphone use differenct GNSS receivers. What is their static and dynamic accuracy?

Hi,

Currently I'm working with THP-1 cells which I've differentiated to macrophages using PMA. After stimulating them with a pathogen i'm seening these ''white'' dots and it looks like the macrophages are transporting them to one another. Can someone clarify this? See picture.

Kind regards,

This solutions would require an unacceptably high financial investment and delaying of the trains in stations.

An alternative solution can be:

Transportation of wheelchair users can be planned on major railway terminals, at least 30 km apart. Therefore, it is necessary to organize “door to door“ transport for the disabled in specialized vans.

What's your opinion about it?

Hello to all,

I'm going to research the surphace morphology of grain impact on two-phase gas-solids flow dynamics during fluidized bed combustion or mixing or pneumatic transport of powders. Does anyone is connected with this topic?

Best regards.

I am reading some literature which says sampling should be done when soils are at field capacity. This ensures appropriate interpretation of field penetration resistance measurements, facilitates proper mixing of subsamples, and prevents soils from smearing during sampling and transport.

This makes me think what are appropriate conditions, precautionary measures and pre-preparation for taking samples from a 60 acres.

For isolation of the anaerobic oral pathogen  , a medium without hemin can be used?  which medium is used for the transport of the samples and which broth is used for the culture of this  strains. Can this anaerobic bacteria grow in blood agar?

I am looking for the gene that may responsible for metal transport in the plant (Rice) under stress condition. 

What do you think, which factors determine a number of passenger (railway)? Which are the most important? Population? Distance from the city centre to railway station? Could you recommend literature where authors focus on modelling and forecasting the number of passenger based on other factors?

Understanding the biological roles of 4 micron infrared, 'transport DNAs', 'differentiation DNAs' and resonance is prerequisite for following my arguments. The attached summarises half a century researching the consequences of discovering 'ice XIc' in 1967. 

I have a long, horizontal pipe carrying liquid chlorine to be insulated. The pipe will be heated from a single line of heat trace taped to the underside of the pipe (but within the insulation). How can I calculate the minimum thickness of insulation needed to maintain a minimum pipe surface temperature of 80°F?

Parameters:

- 3/4" carbon steel pipe (schedule 80)

- Transporting gaseous chlorine

- Heat generation below pipe (per unit length) = 3 Watts / ft

- Outside air temp. of 10°F

- Need to maintain pipe surface temp. of 80°F

I have extracted high integrity RNA and freeze-dried them for easier transport. What would be a proper method or protocol for reconstitution of the RNA. Is adding RNAse Free Water and vortexing enough? 

I know of factors like higher crowding, reduction in space, transport/ handling stress and constant but restricted feed supply. Are there any other factors that are new to the animals when they are domesticated?

With Regards to the Sb2Te3 topological crystal what could be the reason for observing activation energies (measured in rage of 200-350 K ) higher than the energy ban gap in spite of the ohmic nature of contact. ?

My problem is near to the General Traveling Salesman Problem with repetitions (General TSP-R) where some points can be visited more than once. However, the differences in my problem are:

1- not all nodes have to be visited by the salesman.

2- some nodes will be visited once.

3- some nodes will be visited more than once.

Is there any way to prevent subtour occurrence?

How one can remove capping from a thin film?

I waould like to do transport measurements, without capping it seems that the magnetic layer gets oxidized and if one uses capping then how to perform transport measurements?

Can anyone suggest how to remove the capping using any methods?

In developed countries there is a set of measures and strategies to encourage people to use river transport instead of vehicles that cause congestion.

What are these strategies?

I have thought of a method but I would like to contrast it with other experiences.

In order to know the exact CO2 footprint of  an agricultural product and  of its method of production(open field, green house,vertical farm), I need to take under account how much energy is consumed and what are the CO2 emissions during its cultivation, transportation, refrigeration and marketing. 

How much energy does it take to produce the seeds, transport them and plant them in the field, then gather the crop and transport it where it will be stored until it reaches the consumer? 

I am working on lettuce in Greece but I am interested if someone has done such a research for any location and crop. 

As example: Drug A (Km=2uM), drug B (Km=45 uM). If we do inhibition or DDI study with known inhibitor and found IC50 for drug A is higher than drug B. what will be the explanation of the result (IC50 or Ki) for two drugs (A and B)?

What will be the impact of public traffic management for logistics service providers?

Dear colleagues. I am interested in knowing methods and appares for measuring intraocular pressure using transportable and reliable devices that do not require anesthesia or connection to electric current. Someone could tell me, based on your experience, models or references of tonometers that meet these characteristics. Thank you very much in advance.

There are some different varriants of rail routes with many parameters. It is necessary to choose one of this taking into attention all parameters.

plasma transport in micro and macrocirculation,fluidodynamic area.