What are the navigation considerations on the Youghiogheny, Casselman & Potomac Rivers between Ohiopyle…

I want to travel by canoe from Ohiopyle State Park to Cumberland, MD on the Youghiogheny, Casselman and Potomac Rivers

What are the navigation considerations? Also I will have a bike and trailer for the canoe, will be interested in bike trails paralleling or intersecting the river.

  • Locks and Dams
  • Camping/accommodations
  • Launches
  • River side services (away from large cities)

Hypothetically the trip would be completed, with only muscle power, rowing or pedaling. In either a single trip or by pedaling upstream and rowing down stream, in one or more outings.

Related (West) What are the navigation considerations on the Monongahela and Youghiogheny Rivers between Ohiopyle State Park (PA) and Pittsburgh PA?

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How to sell a project to your competitor? Documents, Warnings, Considerations

I’ve created a simple SaaS (Software as a Service) project that helps small towns improve their tourism websites and apps easily, fast and paying a small fee each month.

Why I want to sell it?

I’m moving to the Netherlands and I will not have enough time to develop it. It is for small towns, so there will be many problems with meetings, and so on.

Why to my “competitor”?

  • They are bigger and can offer this service.
  • They trust me, tried to hire me a couple of weeks ago.
  • This project can generate synergies with their business model.
  • Got access to the CEO.

What are my concerns?

I want to propose it, but I don’t know how to start. I have the design, the development and examples. The system is straightforward and I’m creating documentation to simplify/explain it even more.

I don’t want to get copied, although that would require a good investment on their side, so I think that it isn’t very smart.

  • What should I give them?
  • How can I see if there’s real interest?

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BIBO Stability considerations for Transfer Functions

So I was wondering if you have a system, consider it $G(s)$ and it has no initial energy i.e. $x(0) = 0$ for the initial condition. If the transfer function exhibits: pole cancellation, would it be considered stable. I know this is a common paradox in the discipline ,but with the knowledge of an already “energyless” system that will only respond to a simple input/output relationship. Does this actually affect the stability for controller purposes?

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What are the navigation considerations on the Youghiogheny, Casselman & Potomac Rivers between Ohiopyle (PA) and Cumberland, MD

I want to travel by canoe from Ohiopyle State Park to Cumberland, MD on the Youghiogheny, Casselman and Potomac Rivers

What are the navigation considerations? Also I will have a bike and trailer for the canoe, will be interested in bike trails paralleling or intersecting the river.

  • Locks and Dams
  • Camping/accommodations
  • Launches
  • River side services (away from large cities)

Hypothetically the trip would be completed, with only muscle power, rowing or pedaling. In either a single trip or by pedaling upstream and rowing down stream, in one or more outings.

Related (West) What are the navigation considerations on the Monongahela and Youghiogheny Rivers between Ohiopyle State Park (PA) and Pittsburgh PA?

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Startup PIN security considerations for BitLocker

I plan to implement Bitlocker encryption on my devices, but I wonder how to achieve the highest possible security against offline attacks.

I understood the following:

  • I can enable TPM based protection only, which ensures that the drive is encrypted by a key, which is encrypted by the key in the TPM chip
  • I could add a Startup PIN.

Does this key combine with the key stored in the TPM chip? Clearly having this startup PIN is not enough to decrypt the disk? I would assume so, but I’m unsure…

The same would be interesting for smartcard-authentication. Is there still a second part used from the TPM chip?

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Bitlocker – Startup Pin security considerations

I plan to implement Bitlocker Encryption on my devices, but I wonder how to achieve the highest possible security against offline attacks.

I understood the following:

  • I can enable TPM based protection only

which ensures that the Drive is encrypted by a key, which is encrypted by the key in the TPM chip

  • I could add a StartupPin

Does this key combine with the key stored in the TPM Chip?

Clearly: Having this startup pin is NOT enough to decrypt the disk? I would assume so, but I’m unsure…

The same would be interesting for Smartcard-Authentication. Is there still a second part used from the TPM Chip?

I was not able to find information about that anywhere…

Jessi

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What are the design considerations for the control surfaces of a supersonic plane? [on hold]

I’m designing a system for a supersonic plane. I’m finding limited information on control system design for supersonic systems. Does the subsonic design methodology apply? I see supersonic planes being tailless and delta winged rather than like usual subsonic ones and so, I wish to know if these considerations also affect the control surface sizing. How would one also choose the actuator torques for such a system?

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What are design and security considerations for a site that connects to its users’ own dbs?

I’m envisaging a website where a user signs up, has their own database running somewhere, then provides credentials to the website so that website can access that database. For example, if I was the user, I might be running MySQL on a shared hosting plan somewhere – I want to join this website and authorise this website to query my database.

I am looking for advice on the security issues I would need to consider (as the website developer, but also the issues the end user would need to consider).

I think securing the website with https is mandatory, but then how should the db credentials be stored? In plain text in the website’s own db? How should the website make a connection to the user’s db? Would ODBC suffice for most DBMSes? If the website were coded in, say, PHP, would using PHP’s native database connection functions be more secure, or better for any other reason? Would the user need to authorise (within their DB) the connection as coming from the website’s specific ip address? etc.

I realise this is not a simple programming question with a black and white answer but I’m hoping to be given a list of considerations I should investigate, or perhaps links to articles that discuss these issues.

Thank you in advance.

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How to sell a project to your competitor? Documents, Warnings, Considerations

I’ve created a simple SaaS (Software as a Service) project that helps small towns improve their tourism websites and apps easily, fast and paying a small fee each month.

Why I want to sell it?

I’m moving to the Netherlands and I will not have enough time to develop it. It is for small towns, so there will be many problems with meetings, and so on.

Why to my “competitor”?

  • They are bigger and can offer this service.
  • They trust me, tried to hire me a couple of weeks ago.
  • This project can generate synergies with their business model.
  • Got access to the CEO.

What are my concerns?

I want to propose it, but I don’t know how to start. I have the design, the development and examples. The system is straightforward and I’m creating documentation to simplify/explain it even more.

I don’t want to get copied, although that would require a good investment on their side, so I think that it isn’t very smart.

  • What should I give them?
  • How can I see if there’s real interest?

All topic

PCB power supply layout considerations

I’m designing a circuit that steps down 230v AC to 12v DC and then uses an MCP73213 IC to charge a 7.4v li-po battery. There is also functionality to switch over to the battery supply if there is no 12v input detected (via Q1, D1, D2). The circuit is to output either 12v or the batteries 7.4v to some buck converters on a separate board.

schematic

I’d now like to begin making the single sided PCB layout. I’d like to get advice on how I should approach the layout of this board especially with respect to thermal considerations. I have placed the components on the board as below. The buck converter circuits (which will connect to the screw terminal on the right side of the board) can draw up to 2.5A so I was thinking I will need to make all tracks which carry this main current, that is the path through the diodes, the MOSFET, the full bridge, the transformer at least 75mil wide and to solder thick copper wire onto the tracks afterwards to make sure to meet the power requirements of that kind of draw. The charging IC tracks I was thinking of making 10mil wide. What sort of solid planes copper/fill if any would be recommended for this circuit? Are there better ways to arrange the components?

pcb layout

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