Gears - Science topic

It is required to do thermal analysis of worm gear. Since worm gear produce lot of heat, it is decided to fill the worm gear box with oil. I was able to calculate heat produced in gear to friction. However I am really confused how to determine the temperature of oil surrounding gears. I tried using Q=m.s.dt, however I think not all heat generated get transferred to oil. I tried using Fourier method as well, but I got temperature so high that I found it ridiculous. Can anyone provide me the calculation method assuming any data if required. The only data I have is that gear require 5kW input power and the efficiency if 65%.

Can you recommend some articles on a position and attitude calibration method for the linear laser sensor in gear 3D measurement?

Using FGMs in the production of gears offers significant advantages in terms of wear resistance, thermal properties, mechanical performance, stress distribution, corrosion resistance, design flexibility, and long-term cost efficiency. These benefits make FGMs an attractive choice for high-performance and specialized gear applications where traditional materials may fall short. The ability to customize material properties precisely where needed allows for the development of gears that can withstand extreme conditions and deliver superior performance over their operational life.

# 130

Dear Igor Sbovoda and Dmytro Lande

I read your paper

Enhancing Multi-Criteria Decision Analysis with AI: Integrating Analytic Hierarchy Process and GPT-4 for Automated Decision Support

My comments

1- First of all, l was pleasantly surprised by the subject of your paper; it appears to be the first, at least for me, to incorporate AI in MCDM

2- In page 2 you say, referring to AHP “This method was designed to address complex decision-making scenario”

Not in my opinion. It was designed according to a lineal hierarchical structure that is not adequate to model a complex scenario.

The pivotal moment you refer is inexact. At the time of its appearance there were other MCDM methods addressing complex problems, starting 1n 1948

You say: “providing a rigorous framework for decomposing decision problems into a hierarchy of more easily comprehended sub-problems, each of which can be analyzed independently”

Breaking a problem is useful to understand it, but not for solving, and I am afraid that they cannot be analyzed independently because normally they are related according to the Systems Theory, and thus, they are normally interconnected. It is like for designing a car you study independently the engine, the transmission, the aerodynamics, the electric system, etc., but all of them are related. The engine depends on the aerodynamic of t he body, depends on the electricity consumed by the car and from the mechanics of the transmission, that is the gear box and cardan shaft

A MCDM problem is a system, and as that it cannot be solved adding up the best results of each part. The whole is generally no equal to the sum of the parts.

3- You say “specially designed format that facilitates a forced choice paired comparison, enabling decisionmakers to systematically evaluate the importance of each criterion against others”

Pair-wise comparison is not normative but descriptive, and as that irrational. On what grounds can you assert that criterion C3 is 3 times greater than criterion C1? Only on the DM intuition, mood or imagination. Nothing scientific indeed

4- “Its unique capability to merge mathematical precision”

How can you say that a method based on intuitions and feelings, has mathematical precision?

5- As you said, the GPT is trained at large data, which is the heart of AI. However, even when your idea of using GPT is indeed revolutionary and very interesting, apparently it does not take into account that in MCDM, each problem, even on the same subject of another one, can be different.

And this is because it is true that you can get valuable information on the type and number of criteria using GPT, but don’t forget that in real practice those are determined based on the series of alternatives they will must evaluate, and as you know, this is opposite to the AHP procedure, that first selects the criteria.

The GPT most probably can give you information linking criteria to alternatives, but it is for me unprovable that those may coincide with your case.

Consequently, if a company decides to analyze three different projects, the DM must know first which are the projects, and then, go to the technical person that in the company is responsible for each area, as engineering, finances, costs, etc. It is them who know the problem and can tell the DM which is the criteria that for each individual point of view should be considered. It is from them, after many meetings and discussions, that normally take into account personal interests, that the final set of criteria is established. This is something that the GPT cannot do.

You have to work with a unique organization, not with the average of 1000, because the number of stakeholders, their ideas, their needs, their wishes and their interest are not condensed in a set given by GPT.

Remember that in despite of the tremendous experience we have on agriculture, we are still unable to predict the volume of the next harvesting or even predict when it is going to rain in adequate amounts for crops

6- Something that you did not mention is that AHP demands independent criteria, something that practically does not exist in the real world. How do you query GPT about this? Will you ask it to select criteria that satisfy this condition? If you do not input your alternatives, how it will know that must adjust to such stringent condition? , albeit you did not to worry for it if you work with ANP.

It appears from your questions to GPT that you are maximizing everything. How do you proceed if you have to minimize a criterion like ‘cost’, together with 10 or 15 more criteria?

7- In page 6 you do not detail detail the final criteria. Curiously, don’ you think that communications as well as back up systems are missing? Common sense tells you that that is fundamental

8- In page 6 you asked a machine for subjective values? How can a machine do that? It only got a set of real values and it is unable to intuit anything; that is for human and may be for animals.

9- In gage 13 you talk about matrix consistency. Could you please explain why the estimates of a person must be consistent or transitive? Who says that?

I hope my comments may help you

Nolberto Munier

I am working on the dynamic analysis of spur gear pairs for various faults.

I have completed the static analysis of spur gear for various faults.

My next task is to perform the dynamic analysis of spur gear in the ANSYS workbench.

It will be a great help if anyone can provide the step-by-step procedure to perform the dynamic analysis of spur gear on the Ansys workbench.

I am working on dynamic analysis of spur gear pair for various faults. I performed static analysis but unable to do dynamic analysis. Any help would be greatly appreciated.

please help me

wanted to know What is the requirement for gear train design

& gear design & devlopments

I need how signal from Governor passes to Turbine, gear box and alternator to develop particular desired power?

My under standing is as below

Pl.correct me

In the essay linked above, which is written by Helge K. Nylenna, we learn that members of the Church of Norway have long been practising at least two types of democracy.

This discussion is geared at sharing where you have experienced democracy. Was it in a religious community, like the Church of Norway, or perhaps in your family, workplace or school? And what type of democracy was/is being practiced?

What basic, post graduate textbook on research methods (including qualitative and mixed methods equally) do you recommend? I am tasked with writing a research program for a new masters class for our psychology department. However, the powers that be wish this to be used as a general class and shared with the business folks. The current class is only business, and their textbook is clearly geared toward research within and for the benefit of businesses. I'm looking for alternatives which would work better for both business and psychology. Thoughts? TY!

I work for an entity that provides rapid response for public medical emergencies. I'm looking to see if anyone has information on ways in which to improve response times for rapid gearing up of vaccine and other medical support items. This would include manufacturing, logistics and administrative, or other issues related to such support. All leads and suggestions are welcome.

Hi,

I'm interested in AI applications as applied to Ham Radio. Specifically, I'm interested in which manufacturers have or will soon have advanced capabilities in their kit. These capabilities can be any of the following:

Thanks,

Chris

I am currently doing my dissertation on 3d printing using alumina oxide and I decided to choose gears. However, I am stuck because I feel like I might have a solution to the wear and tear problems that metal gears go through which causes failure. But I realize I do not have a story. Which machine, industry or application do I want to test this gear? I want to talk to anyone who is currently researching in this area or has any idea about this area.

I would like to measure the chemical content of a gear surface to a depth of 1 mm. But there is a problem because the x-ray photoelectron spectroscopy (xps) method that I will use can only reach depths of a few nano.

Is there a possible method in spectroscopy to analyse the chemical content layer by layer of a metal up to a few millimetres thick?

Control of viruses is mostly geared towards manipulation of cultural practices.

Recently, I am working on project of analysis of spur gear in Abaqus and simulating the meshing stiffness of gears, but I have encountered some trouble. I don't know how to implement the extraction of gear deformation in Abaqus software.

Any help is appriciable.

Ghost gears produce microplastics inside the seawater and sediments. I want to know, I am looking for some models to show the relation between the number of microplastics and the number of ghost gears.

l have a polycarbonate sheet of a thickness 11.5 mm and I manufactured it as a spur gear, then I tried to check the stress fringe in a photoelastic test (plane polariscope) to find the bending strength of the gear teeth.....is that thickness is suitable for my model?

because the results seems to be lower than the analytical solution results

Created a single stage speed reducer in Adams view. Applied a constant torque on input gear. After simulation, plotted the torque vs time for output shaft. But torque curve is fluctuating not a constant one. As per theory the output torque must be gear ratio times the input torque. I'm not getting it in adams view

I have calculated the gear meshing frequency of planetary gearbox to be 786 Hz. However, when a FFT is performed on the data acquired for the same planetary gearbox I could see peak around 645 Hz and not at 786 Hz.

The calculated mesh frequency was done based on the speed and number of teeth. But the signals acquired during operation was under loaded condition.

Does external load change the natural frequency and meshing frequency of gear?

Is there any reference to calculate the theoretical gear mesh frequency in relationship with load.

Attached FFT plot.

Thanks in advance for sharing you knowledge.

I understand there will be exact multiple of fundamental frequency based bearing rotation with respect to fundamental, based on gear rotation with respect to fundamental. But what exactly means for multiples of bearing rotations, multiples of blade passes like 1x, 2x, 3x etc.,

How to calculate torque and forces (tangential, radial and axial) for a pair of spur gears when they are in meshing?

I am doing a project on power generation using multiple humps. Force is known. All the respective gear and shaft radii are known. y using this, this I can found torque using the relation T=F*l ...

I have a relation P=2 pi NT.. but in this relation power and rpm are unknown...

Is there anyway to find the power or rpm? Any other formula to find power with respect to rpm if available then please share.

Thanks

Electric Vehicles are gaining acceptability all over the world . Further, carbon emission concerns could bring in policy changes in future, thus, hampering the growth of IC based vehicles. EVs could be disruptive in nature slowly killing the market . If that scenario is going to take place, how would the leading manufactures and their ancillary units are going to gear up for the future. I request learned members to provide answers to this critical question which is going to impact the existing auto ecosystem.

During the period of prophet (may peace be on him) not only Dinar and Dirham but also some homogenous commodities e.g., wheat and barley and dates were used as money. These derived their purchasing power from their intrinsic value. This continued during the period of Khulfae Rashidun (may Allah be pleased to them). Dinar and Dirham are most stable single commodity based measures of value and these were used as common medium of exchange and Shariah used these in description of its universal provisions. Thus these were used as measure of value and unit of account, and store of value and there is no disagreement on these issues. Sale on credit and Riba free loans Musharikah and Mudarabah were in practice, Riba was strictly prohibited and Zakah was imposed and these constituted the most important features of monetary and financial system of Islam. Therefore those who hold that Islam has no preferred monetary/financial system are clearly wrong.

Nothing other than common medium of exchange can perform measure of value function of money. However to perform as a measure it must be a highly reliable and stable measure of value/purchasing power. Shariah ordains utmost care to ensure just measurement and thus to be held to be Shariah compliant common medium of exchange must have most stable value. We may not emphasize other conditions as fulfillment of this condition normally ensures satisfactory performance of other functions. This ensures economic justice and efficient Market as well as allocative efficiency. Further other forms of money should be allowed restricted use to fulfill such other monetary needs of the economy that need to be met to ensure that monetary constraints do not hamper economic growth. Price as well as purchasing power of everything varies with respect to anything else due to relative changes in supply and demand. Purchasing power is normally measured with respect to a representative basket of national product. As regards freely floating fiat money a defined representative basket of national product is the right measure of its value and thus constancy of purchasing power of freely floating fiat money as normally determined implies that it will discharge the measure of value function of money efficiently. It follows that economic justice and growth in a non-exploitative (Reba free) economic system requires that monetary and fiscal policy be geared to ensure nil rate of inflation.

Reference

Hifzur Rab (2009). Freedom, Justice and Peace Possible Only with Correct Wealth Measurement with a Unit of Wealth as Currency. Paper presented at International Conference on Unity of Sciences held on Jan14-15 at BCG trust University Chittagong. Published HIJSE 26:1, 2010.

Hifzur Rab (2010). Interest, Monetary Manipulation and Misunderstanding are Stifling Emergence of Just and Efficient Islamic Alternatives. Paper presented at Seventh International Conference on Unity of the Sciences held on Jan 10 at UKM, Malaysia. Published HIJSE 27:3, 2011.

Hifzur Rab (2014). Poverty Systemic causes and eradication. Paper presented in 2nd International Conference of CIIS: Poverty Alleviation and The Social Contract, Universitas Sultan Hasanuddin, Makassar, Indonesia November 26 and 27, 2014. Published in 2016 in Choudhury M.A. & Uzir A. M. (Ed.), The Social Economy: Poverty Alleviation and Social Wellbeing Series, Journal of Ethics, Economics and Finance Volume 1, Nos. 1&2, 2016, Special Issue P81-108, Cambridge Scholars Publishing.

I am currently working on a gear problem where the gear assembly has to be kept inside the air domain. To make the gear rotate I have to give assembly in the geometry section and to put the model in an air domain and to make the air flow over the geometry surface I have to give Union in the geometry section. I don't know how to make both happen simultaneously. I have been trying to solve this problem over a few months But, not been able to find a solution. I need your help with this issue.

The first report of P. miles in the Libyan waters was on the specimens caught on 1 December 2018 by a professional spear-fisherman using a diving air compressor at a depth of 25-27 m.

Currently, the records the eastern Libyan waters spread of the lionfish via reports posted on social media.

We understand that monitor and sampling campaigns are a powerful tool to increase databases for invasive species in the Libyan waters, also it's one effective way to quickly studies more of this species.

Sampling campaigns are a quick and simple way to increase knowledge about the successful establishment of the lionfish Pterois miles in Med waters . They allow researchers to collect a large amount of information in a short amount of time and help to get the most environmental awareness for local fisher.

We are launching a sample collection campaign for Lion fish in the Cyrenaica coast in the Libyan waters, given the fast nature of lionfish colonization , monitoring its invasive status, requires some special equipment's, samples are required to confirm the precise identity of the lionfish in question.

This equipment is not available in Libya.

Did you know where we can find an assortment of lionfish hunting gear and accessories free of charge? OR If Can anyone help us to provide this equipment free of charge.

Hello,

I want to control 2 Encoder DC Gear motors. If I write very specially, my motors model number is PGM35B-3657E. Can anybody suggest to me any good motor driver which is a 2 channel DC motor controller, has ports for encoder pins of the motor, and USB port for giving command from any computer?

I performed quasi-static analysis on gears in ABAQUS. After analysis, I extracted the U3 parameter to measure the gear rotation. What is the unit deg or rad? I am confused.

Similarly, when I rotate the gear, I enter the values in degree. But I am not sure whether ABAQUS is considering it as radian. Would you please clarify both of these doubts? Thank you.

is there any standard formula for root fillet radius for DIN 3960 ?

I want to transfer power between two parallel shafts. My aim is to develop a drive mechanism so it can transfer power between two shafts, but I want mechanism to be flexible in terms of Centre distance between two shafts. Gear mechanism should be able to vary canter distance between two shafts. Please suggest me some solution or some literature for the problem.

Thank you in advance.

Good Afternoon to all ..

I hope you are all safe and healthy.......

I have one doubt please let me know what are the tribological properties we should take for while making of composite gear.....

I hope for your immediate response....

Kind Regards

S.Sathishkumar

I am currently dessigning a small UAV and was wondering how I can size the main landing gear frame in order to be as efficient as possible. Any ideas?

I realized that too many people are asking question regarding the boundary conditions required for setting up a simulation for a spur gear system here in RG. Therefore, I prepared this and attached here to show how boundary conditions and contact should be setup in this simulation.

Feel free to comment on it.

As always, please recommend the answer if worked in your case.

Hi

I am working on project of analysis of spur gear in Ansys. I modelled the gear with correct involute curve in Solidworks and imported assembly in ansys workbench, I am using revolute joint on one gear with moment and on another gear rotation is used. contact chosen is frictionless symmetric behaviour. moment applied is 10000 Nmm and rotation is 20 degree.

when i am plotting curve between mesh stiffness and angle of rotation, it is not as per the graph available in literature.

Any help is appriciable.

attached ideal graph as per literature and my graph

gear design

There are several barriers that hinders the transition to a circular economy. Among the barriers include supply chains which needs to be redesigned in order to align or facilitate smooth transition. The question is geared towards understanding the current research directions as far as supply chains are concerned

Hi everyone,

Does anyone know up to what reduction ratio of gear does a motor remain back-drivable? I want my robot to have safe interactions with the environment and other humans. Can you give a reliable reference for your claim? Thanks in advance.

We nitride 15-5PH stainless steel for aircraft landing gear at 405 degrees for 70 hours to get a case depth of 40 microns. We have noticed on testing that we get spallation and wear of the case. We tested a component with a 20 micron case under the same conditions and it performed much better (almost no wear). Could someone provide an explanation of this effect?

I am currently trying to design a 2 finger robotic gripper with spur gear drive unit. Drive unit is drievn by a servo motor with max 24V. The maximum gripping force acting would be arounf 50N for a weight of 500 grams.

Hello,

This is my first time using Abaqus to conduct a dynamic analysis. I'm trying to simulate drop test of a helicopter skid landing gear but the skid is not colliding to the ground but penetrates into it. Does anyone know how to solve this issue?

Thanks heaps!

Chee

My current research deals with multibody contact dynamics applied to the area of power transfer components such as gears. But after taking up a course related to human body motion, I was intrigued by the idea of modeling the dynamics of the human body and its potential applications in assistive devices and robotics.

I am looking for good summary papers on advances done in the field of "Dynamics and control of human body motion". Would appreciate it if people working in this domain could link me to relevant publications/ articles.

Thanks

Lokaditya

Hi everyone. I am a PhD student. I have designed an educational manipulative and have to validate it with children. I am using between subject design for it. So there would be two groups- experimental (to be taught with my manipulative) and the control group (to be taught with regular black board method). I am however not sure about what should be the number of participants to be taken in each of the control and experimental groups? Is there a standard number that would be suffice for the PhD requirement? Also this is my last year and I need to gear things up so have to take an appropriate decision.

Any help would be truly appreciated.

Thank you.

Ekta

Pediatric patients' management requires natural closeness and facial expressions. But social (or physical) distancing and putting on masks and varieties of personal protective gear is a clear hindrance to the amiable and pacifying appearances. Children are likely to be experiencing worry, anxiety, and fear of observing these attires. What to do?

I am having trouble deriving what this project needs.

Problem for PBL

1. Based on “door opening control system” as shown by Figure 1, do the following:

a. Derive it mathematical model and block diagram (input is (Va) Rated motor terminal voltage

and output is door position 8L).

b. Analyze it stability

c. Implement P, PI, PD and PID controller as a controller of the system. Especially for PID

controller, gain tuning must done manual and automatic. Analyze each type controller

responses and compare with system response without controller.

d. By using PID controller you should ensure maximum overshoot (OS%) ≤ 10%, minimize Rise

time (Tr), Settling time (Tc), Peak Time (Tp) and reduce steady state error (ecc).

DC Motor data

1. (Va) Rated motor terminal voltage is 220 V

2. (Jm) Moment of inertia of the rotor is 0.222 kg.m2

3. (JL) Moment of inertia of Load is 0.022 kg.m2

4. (Bm) Motor viscous friction constant is 0.003 N.m.s/rad

5. (kb) Electromotive force constant is 1.25 V/rad/sec

6. (ka) Motor torque constant is 1.28 N.m/Amp

7. (Ra) Electric resistance is 11.2 Ohm

8. (La) Electric inductance is 0.121 H

9. (N) Rated motor speed is 1500 rpm.

Gear Data Gear 1

n1=50 , r1=10cm Gear 2

n2=750 , r1=150cm

Noted: no friction on load (between door rail, pully and gear). Door opening control system

The file I uploaded is the picture of the door opening control

My final project is analyze the stress and the strain on modified bevel gear with Ansys Workbench. First I did convergence test to check my bevel gear mesh in the static structural analysis because I couldn't do that in transient structural, I click convergence test on my result then it went automatically. then after i had convergence test my mesh is developed automatically, I got very good mesh and convergence result. But I confuse how to export the mesh that I get from convergence test in static structural to my transient structural, the mesh that I get from the convergence test is the mesh that i needed.  if anyone know about this, please help me. Thanks.

I want to apply R language on fisheries analysis. R program become common in fisheries analysis, so I need to benefit in my work ( in fishing gear data analysis). so , I wish if any one give me R- package of fisheries analysis especially fishing gear selectivity.

Imagine a platoon, such as the "peloton" in a cycling competition or cars on a highway, where the players benefit from travelling close to each other due to wind drag reduction. If each speed would be determined by the optimal operating points stemming from their bikes, aerodynamics and body. For example, player 1, might be optimal (in terms of fuel efficiency) at a specific gear and given a specific cadence. Each player will propose changes to each other, such that each one will give a proposal to the player(s) which are obstructing its optimal trajectory. Negotiations, from say player 2 to player 1 (where player 1 is in front of player 2) such as "pedal 1 m/s faster and you'll get 1 buck", where the new speeds and compensations will be calculated individually from each cyclist such that the prize is lower than the potential "fuel cost" that player 2 would experience from operating at non optimal speeds. These proposals are then accepted or denied. I'm thinking that these proposals should then converge to some optimum where no members in the platoon will benefit from changing its strategy, hence a kind of Nash equilibrium.

I'm fairly new to game theory, but I want to formulate this problem as a game theoretical one, to see where these proposals would converge, and how to prove it. How would I begin?

I model and simulate the contact between two gear. I applied torque on one of the gears and I fix the other using fix displacement in Ansys. Automatic contact detects the contact between gears teeth. The contact type as default is bonded. However, it must be either frictionless or frictional.

By changing to frictionless the simulation become nonlinear.

Despite all of my attempt, the solver does not converge. I change many setting, however, I could not get result.

I have mathematical equations deduced from the dynamic model of the gear for one DOF of  gear system. How to simulate those equation in matlab to generate signals, so that post processing of signals, the behavior of gearbox can be interpreted.

We are looking for the suitability of fishing live P. longirostris for a study on the energetics of this species. We are aware of the bottlenecks of depth as a significant factor in their survival, but any onformation on fishing gears and/or techniques will be highly appreciated

As we all know, the DNA is an information carrier. It contains several disctinct codes of which the protein code is the best known. Since about 20 years we know that the protein code is optimized for error buffering. Of more than 2.4 x 10^18 possible codes the protein code is optimal together with a score of additional protein codes, which we also observe in living systems. How do we understand this extreme fine tuning? Is there a scientific explanation why the first cells were geared with an optimal code? Is it even possible to evolve an optimal code, given that the age of the earth is about 4.54 billion years old?

I'm working on a Project to improve the vehicle Position accuracy based on vehicle data. Basically I'm trying to make an Algorithm that can estimate the vehicle position with neural networks where my input data are the vehicle data like velocity, acceleration, braking pressure etc.. and my outputs are latitude and longitude. I''m doing a research about this but I didn't find any good papers about this topic. there is some good related papers but they are about using Kalman Filters or INS data but my Goal is to achieve this with using vehicle data from sensors like I said, for example velocity, acceleration, Braking, steer wheel, current Gear etc.. is there some good refences about this? I hope someone here have Experience about this and can help me with some advices

I found it challenging to find authors and works on scaffolding framework in science inquiry. It would be helpful to receive suggestions on certain authors who have worked on this research domain.

Basically we want to measure the torque and power of the roller. We want to replace the chain mechanism with the separate motor for each set of roller and gear mechanism. We want to attach one motor to each set of roller (2 Rollers).

Hi all!

I'm conducting a bit of independent research on humanitarians and their perceptions of safety and security at home and abroad among other things. However, I'm finding distribution of the survey I've created especially difficult as there are really few places that allow for promotion of research materials geared specifically to humanitarians (especially as an independent researcher). Has anyone else encountered a similar issue? How did you overcome it?

1. Lubricants for transformers

2. lubricants for turbines

3. engine oil - 1

4. Greases

5. Lubricants for gears, bearings and lubricants

Very interesting results, although based on my own research I suspect that the actual mechanisms for the observed effects have to do with induction of systemic resistance by exposure to the conidia, rather than the actual endophytism presence. Lots of microorganisms have been shown to induce SR in a wide range of plants, and this phenomenon has become accepted in the plant pathology community. Also, I have to note my gears that EU regulators are getting very nervous about the endophytic nature of these entomopathogenic fungi and the metabolites they may be releasing. I fear that EU, and maybe even USEPA, too, will increase data requirements for registration, data to reflect the safety of produce colonized by Beauveria etc. We already saw this with the Austrian uproar about oosporein released into the environment in infected pasture grubs. Considerable research hard to demonstrate that they amount of this metabolite was of no concern, and registration of a Beauveria was greatly delayed.

Dear professional people,

I have a very tricky motor I want to control but I cannot release the brake cuz it is tight and manufacturer does not care to give proper detail.

Here are the specs:

Motor Specifications:

1. 25V at 50A, they said the motor could go up to 100A according to the plot they showed us. The value is referred as the Input power. I saw in the motor specification the Torque is 2.01 Nm.

2. The Electric Brake is tricky. First you need to supply 24V at around 0.54A and then it can be decreased. Since there is some current protection, the positive (+) terminal is the one connected to pin 4 of connector CN5/D from FD Base Controller.

3. In other picture you can see the tire diameter of 260 mm. And the gear ratio of 1/27 and then the motor. No additional gear ratio to consider. 18 pulses per revolution ( 967 pulse or 6kph)

4. No data for Thermal ratio. However, there is a 10kohm thermistor that is used for temperature sensing. If I am not wrong, if current is around 45A ( never happened) the base will shut down.

5. Max rpm of 4750

6. Cable is AWG 14, U is white and V is red

Please a help is ok.

Thanks

Dear All,

Can you help me in disseminating this EU Fisheries and Aquacolture Products Database?

The European Union (EU) Fisheries and Aquaculture Products Database of the EU database on fishery and aquaculture products, is NOW ONLINE! It is an information system on the commercial names of fishery and aquaculture products marketed in the EU. The database is the result of a pilot project that involves several partners, including the National Research Council - Institute of Marine Sciences (CNR-ISMAR) of Ancona (Italy), funded by the European Union and co-ordinated by the Directorate-General for Maritime Affairs and Fisheries (DGMARE). The project aims to provide a complete information system, available in all official EU languages. The purpose of this information system is to provide consumers and all stakeholders with information on fishery and aquaculture products through a centralized multilingual system. The information system focuses primarily on trade names. It also includes species names, FAO codes, marketing standards, catch zones and fishing gear. The system is a reference point for all users in the EU, whether they are consumers, traders, or control authorities.

You can easely find the database site by copy and paste the following link:

Your suggestions, your directions, and more generally all your observations are very important. To help you with this task, we've created an online questionnaire that will take you a few minutes of compilation but will provide us with important information to improve and modify the web portal more effectively. The questionnaire can be reached at the following link (both in Italian and English):

Hopefully you will find the service offered by this useful portal, thank you for your cooperation.

Dear Researchers,

I wanted to know whether this model is designed by yours,any software or taken from solidworks tool? Because, accuracy of teeth geometry is crucial. Can you inform me please about this ?

Best Regards;

When indoor ambient conditions affect or initiate certain behavior, the mechanics of this type of learning can be viewed from an environmental psychology perspective (Mehrabian, & Russell, 1974; Pati & Barach, 2010). In fact, the pressure of task performance in a compromised learning environment can cause students to rationalize the outcome their learning based on these conditions and display actions geared toward dealing with the immediate surroundings (Wechsler, 1958).

This summer, my lab will try using a brail to survey non-wadeable river reaches for freshwater mussels. We have no experience using the gear, and older technical reports often do not report tow length. Past experiences would assist with our selection of tow lengths to try out.

i am running simulation of nose landing gear. when i gave 0.07 secs end time then its running for days and when i gave 7*10^-6 secs then its took a day. is there anything wrong in my steps ? how to decide correct end so that impact of object can be done?

In ANSYS we get different stresses for gears under contact. So which stress should be used to compare with Hertzian contact stress.

Hi everyone,

Few days ago we released a male bottlenose dolphin entangled in fishing gear remains in Ecuador. Although we have noticed before some deformities in the tail of this animal, it is just until now we could see them in more detail and take pictures. We noticed the tail of this animal was damaged and deformed three years ago when he was hurt apparently by a boat propeller.

Flukes surface and borders were covered with dozens of hard nodules of different size (2-10 cm in diameter) where fishing gear remains was hooked producing blooding wounds. Nodules look firm, well defined, covered with skin and did not appear externally infected. On flukes surface nodules tended to spread. There is no particular pigmentation, although in those nodules in the borders the skin was pealed off. No nodules were noticed in other parts of the dolphin's body. It is not clear how serious is this particular condition but apparently it does not interfered with his normal activities. Up to 2018 this and other male companion were the males with highest rank in this dolphin community.

A video of the dolphin rescue with close up images can be seen in this link:

Thanks in advance

Fernando

Different soil compounds exist in the soil and as such tend to either accelerate or decelerate the rate of decomposition of human remains. Hence may alter a soft tissue forensic examination. This questions gears towards the proper understanding the effects of these compounds on both surface and buried remains.

The question I have here is related to the torque. I have calculated torque for a mass of 300 kg as 700 Nm for a rotational speed of 300 rpm. (I only need a maximum speed of 10 Kph). Is it possible to use a 500 W motor with speed 2000 rpm, and reduce the speed via a gear or a pulley to 300 rpm thereby increasing the torque ??? Thanks in advance.

Ok, I'll try and keep this short: For the few of you who might know me, I'm a English grad student at West Chester University, and I'm currently in the middle of writing my MA thesis. One of the key components to my research will be a survey of gamers in the Metal Gear community, looking at perceptions of in-game morality and the potential for player-character/character-player transferability of morality.

Here's the problem - as I've already noted, I'm in the English department, so it'll be pretty easy for you all to assume that mathematics isn't necessarily my strong suit, let alone the analysis of data and statistics. I was wondering if anybody is aware of a good resource, either online or as a physical text (hopefully reasonably priced), that can actually teach me the fundamentals of interpreting the data when the time comes. I'm sure there's a "...For Dummies" book out there, but in my experience those aren't always necessarily the best option. Any help in this matter is deeply appreciated.

-Ryan

High Strength steels for gears

I'm writing a dissertation on Dynamic Capability theory, looking at UK technology startups. I'm trying to put together a questionnaire to find the extent to which DCT affects key decision makers in tech startups and if it has an impact on strategic advantage.

Have there been many questionnaires used already in this field which would be good for inspiration? I am new to forming questionnaire studies and the analysis involved.

I have found a couple that look good, but are a bit more geared towards a more specific area of study. I'm doing a Masters dissertation rather than a PhD thesis.

This is obviously quite early stage, but I'd appreciate the odd pointer in the right direction.

Hello, everyone.

I am modelling a self-blocking worm gear in adams. I have two questions:

1. does the reference diameter in the fig.1 mean pitch diameter of the worm gear? I find the the explanation in the adams document that

"Adams Machinery will issue a warning if the user entered helix angle lies ±0.5o beyond the correct helix angle given by formula:

tan-1 (module*(number of teeth or number of start on WORM) /

WORM reference diameter))."

it is consuing for me.

2. I try the self-blocking parameters for the worm gear, but the worm gear is still able to move even if i put the friction coeffient very large like 10 or 20. I am not sure that if there is a bug in adams.

thanks for you time.

Manufacturing has taken a leap forward from manual systems to IOT to industry 4.0, It is now time to switch gears and focus on new avenues

I have a deep groove ball bearing (NSK make). I wish to introduce artificial faults in the outer race and inner race such that I can study their signal characteristics. I am facing two situations:

Hey,

I'm simulating the contact of two moving gears in ANSYS Workbench (Static Structural) with multiple load steps and would like to evaluate the stresses in a radial cross section to better see stresses underneath the surface . 

Is there a method in ANSYS Workbench to evaluate the stresses across a cross section? I know you can make a section cut of the simulated bodies with the options in the bottom right corner, but is there a way to create an additional stress result on that cut surface?

From searching for the problem on the internet I gathered that it might be possible to do with cutting the body prior to the simulation in e.g. Design Modeler and then create a result on the cut surface. I tried that and it works but I get some weird stress concentrations in the cut region that were not there before cutting the gear bodies. I also heard somewhere that it should be possible to do in APDL, but I didn't find any example of that.

Thanks in advance for any help!

Regards

Paul

I did this process base on the following link:

"( https://geekeasier.com/change-mac-address-in-android-devices-without-root/4792/ )

Now, that we know our MAC address and the connection name, we can go on to change the MAC address with this terminal emulator only. Before that you should have a valid MAC address in your mind or generate one from this link. Once, you have a new MAC address, just get on with the below steps:

What should I do now?

if this could be answered then i could make pmm1