DevAsc – Python Divisors Challenge

As part of Nick Russo’s DevAsc study plan, he recommends doing a few Python challenges to check your existing knowledge of Python. One of these is the Divisors challenge. The goal of of this exercise is to take a number, such as 12, and then find all the divisors, that is the numbers that you can divide 12 with and have no remainder. This would 1, 2, 3, 4, 6, and finally 12 itself.

Now, solving this doesn’t take a lot of code. However, I decided that gold plating is allowed in my studies of code. That is, I would rather practice writing functions from the get go rather than just quickly moving from exercises.

To find divisors, we need a little basic math. We can use the Modulo operation to find the reminder of a division. For example, if you divide 5 by 2, the remainder is 1. We call this 5 modulo 2. Because there is a remainder of 1, this means that 2 is not a divisor for 5. If we however use 9 and 3 instead, with 9 modulo 3, the remainder is 0. This means that 3 is a divisor for 9. We then Continue reading

Technology Short Take 128

Welcome to Technology Short Take #128! It looks like I’m settling into a roughly monthly cadence with the Technology Short Takes. This time around, I’ve got a (hopefully) interesting collection of links. The collection seems a tad heavier than normal in the hardware and security sections, probably due to new exploits discovered in Intel’s speculative execution functionality. In any case, here’s what I’ve gathered for you. Enjoy!

Networking

Servers/Hardware

  • This article from Carlos Fenollosa talks about his experience with a new 2020 MacBook Pro compared to his 2013-era MacBook Air. While there is some Continue reading

Infinera, Windstream Claim 800G Milestone

Infinera says it has achieved 800 Gb/s line rates over a 730-kilometer from San Deigo to Pheonix on...

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Verizon Teases Forthcoming DSS Launch for Nationwide 5G

Verizon’s market position on 5G is heavily dependent on its ability to use dynamic spectrum...

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Remote work makes network visibility more critical than ever

What, exactly, is on your network? More to the point, where is your network? Ask yourself that now, then compare this to how your network looked a year ago. The answers have almost certainly changed, with most organizations seeing a rapid increase in the number of employees working remotely.

Hardened, policy-managed corporate networks are being exposed via remote VPNs to home network environments and, in some cases, employees’ home computers. This increases network complexity and may introduce new security and performance issues. To keep things running smoothly, having an in-depth view of the devices and events on your network is crucial.

Maintaining network performance with remote workers

When employees work from home, troubleshooting becomes more complex. Even if an employee is using a company-supplied computer, it is operating on an unmanaged network, and is exposed to everything else that happens to be on that network.

Today’s home networks often have multiple computers, smartphones, tablets, smart TVs, game consoles, and even Internet of Things devices like security camera doorbells. In addition to the security risks of putting a company computer on an insecure network, there are IT infrastructure problems that can arise when work-from-home becomes normalized.

A March 19, 2020, Network Continue reading

FinTech Industry Report 2020-2025 – Trends, Developments and Growth Deviations Arising from the COVID-19 Pandemic

The Global Fintech Market is anticipated to grow at a CAGR of around 20% during the forecast period...

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Microsoft Buys ADRM for Azure Data Lake Boost

The acquisition also supports Microsoft’s continued investments into artificial intelligence and...

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The Conundrum of Virtual Conferences

Okay, the world is indeed crazy. We can’t hide from it or hope that it just blows over sooner or later. We’re dealing with it now and that means it’s impacting our work, our family lives, and even our sanity from time to time. One of the stalwart things that has been impacted by this is the summer conference schedule. We’ve had Aruba Atmosphere, Cisco Live, VMworld, and even Microsoft Ignite transition from being held in-person to a virtual format complete with shortened schedules and pre-recorded sessions. I’ve attended a couple of these so far for work and as an analyst, and I think I’ve figured it out.

If you come to a conference for content and sessions, you’ll love virtual events. If you come for any other reason, virtual isn’t going to work for you.

Let’s break this down because there’s a lot to unpack.

Information Ingestion

Conferences are first and foremost about disseminating information. Want to learn what new solutions and technologies have been launched? It’s probably going to be announced either right before or during the conference. Want to learn the ins-and-outs of this specific protocol? There’s probably a session on it or a chance to ask Continue reading

The Conductor That Sets The Pace For Science At Oak Ridge

Every orchestra needs a conductor to keep everyone playing together on pace, and while a good conductor doesn’t need to know how to play every instrument well, they have to know how to play many instruments and also to understand how it all comes together to create a symphony. …

The Conductor That Sets The Pace For Science At Oak Ridge was written by Timothy Prickett Morgan at The Next Platform.

Weekly Wrap: Hackers Cryptojack Microsoft Azure ML Clusters

SDxCentral Weekly Wrap for June 19, 2020: The Azure attack targets Kubeflow; Cisco SD-WAN update...

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FT8 and IC9700

Setup

The basis for these instructions is this guide, but updated to reflect that the IC9700 is now directly supported by wsjtx and js8call.

Step one: connect a normal USB-A-B cable between the computer and the radio.

IC-9700 settings

  • Menu
    • Set
      • Connectors
        • MOD Input
          • USB Mod Level: 30% (default 50%)
          • DATA MOD: USB (default: ACC)
          • DATA OFF MOD: Leave as default (MIC, ACC)
        • CI-V
          • CI-V Baud Rate = 19200 (default: Auto)
          • CI-V address = keep default A2h
          • CI-V USB Port = Link to [REMOTE] (default: Unlink from [REMOTE])
          • CI-V DATA Baud Rate = 19200 (default: OFF)
  • When running, choose FIL1 (next to the mode in the top left)

wsjtx/js8call settings

  • Radio
    • Rig: Icom IC-9700
    • Baud rate: 9700
    • Data bits: 8
    • Stop bits: 1
    • Handshake: XON/XOFF
    • PTT method: CAT
    • Mode: Data/Pkt (USB also works, but will use DATA OFF MOD as audio, so that needs to be USB)
    • Serial port: /dev/ttyUSB0 (on my Linux machine at least)
  • Audio
    • Input: also_input.usb-Burr-Brown_from_TI_USB_Audio_CODEC-0.analog-stereo
    • Output: also_output.usb-Burr-Brown_from_TI_USB_Audio_CODEC-0.analog-stereo
  • Frequencies
    • Right click on the “Working frequencies” table and insert 144.174 and 432.065 for FT8. I’m not sure about the 70cm frequency, as Continue reading

T-Mobile Names Peter Osvaldik as new Chief Financial Officer; Announces Retirement of CFO Braxton Carter

T-Mobile has promoted Peter Osvaldik, current senior vice president, Finance and Chief Accounting...

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5G-Boost: 5G from today for over 16 million people in Germany

BERLIN — June 17, 2020 — As of today, over 16 million people in Germany can use the Telekom...

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NEC and D-Wave Begin Joint Quantum Product Development, Marketing and Sales

NEC Corporation,and D-Wave Systems Inc. announced that they have begun joint activities to combine...

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SAP Remains Focused on Riding Hyperscalers

“We want to go up the stack, we want to own that as we are very good at that. And they provide...

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IBM Launches Watson Works to Address the Challenges of Returning to the Workplace

IBM announced Watson Works will help companies navigate the return-to-workplace challenge following...

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Open source — the great equalizer.

Technology is a great equalizer and the open source movement has played a huge role in making this true and accelerating the process. Open source levels the playing field for many. Gone are the days where you had to get a job or invest to learn a technology. Open source and Linux opened up access and opportunities to learn and innovate.

We live in an era where hardware and software architectures are powered by open source technologies. Modern system architectures (distributed, cloud native and others) are built with open source technologies and many others continue to move to open technologies (open networking, open Firmware, Linux BIOS just to name a few). Open source has been the driving force in commoditizing hardware in many markets. Open communities like OCP are taking this to the next level.

Open source platforms like github and gitlab have promoted open source development and made it easier to build open source communities and ecosystems. Existing open source communities fuel new open communities. Success stories from disaggregated and open server operating systems fueled the open networking revolution leading to the birth of open network operating systems. Investing in open source and having open source development centers are Continue reading

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