Add notes of HackyHour No. 14

notes/2023-10-25-HackyHour-14.md

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-The notes will appear here soon after the event.
+# HackyHour No. 14
+
+## Backup Strategy
+
+- Presenter: Nils Seipel
+- Disclaimer: He's not an expert and presents just his own 
+considerations and results.
+- Summary: Christian Krippes
+
+Backup Rules:
+1. The best backup is useless if you don't backup regularly
+2. Every backup is better than no backup -> **Keep it simple and usable!**
+
+While the following summary holds some points to consider in order to make
+backups, you **should not wait** until you planed it perfect.  
+**Instead, if you have no backups yet, start now and improve over time.**   
+A start can be simple: by make copies of important data on an external hard drive.
+
+### Data
+
+- What data do we have?
+- How important is the respective data to us?
+- How long do we need or want to keep the data?
+- How often does the data change?
+- How bad would it be if we lost the data?
+- Where do we store the data?
+
+
+### Data analysis
+You can write your results from above in tabular form to get an overview.
+
+Here is a small example; you may have to adjust it to your needs.
+
+| Data     | Location             | Retention Period | Value | Changes | Security  | Backup Medium                                 | Backup Interval |
+|----------|----------------------|------------------|-------|---------|-----------|-----------------------------------------------|-----------------|
+| Projects | Laptop               | forever          | high  | daily   | very high | external HDD 1, external HDD 2, Cloud Storage | daily           |
+| eBooks   | Laptop, eBook-Reader | irrelevant       | low   | monthly | low       |                                               | monthly         |
+|          |                      |                  |       |         |           |                                               
+
+### Risk scenarios
+- Fire in your apartment: External hard drive and analog picture are gone.
+- Laptop theft: All your data is gone, except external and cold backups, e.g., in the cloud.
+- Encryption trojan: Cloud and laptop data is gone.
+- Your hard drive stops working: All data is gone? Recovery might be possible.
+
+### Backup media selection and storage
+
+Considerations:
+- Retention period: 1 or 100 years
+- Resistance against external impacts
+  - Light
+  - Shock
+  - Air humidity
+
+- Stock locations:
+  - Bank safe deposit box
+  - Friends
+
+### Backup media
+
+A general order of recommendations could be.
+
+- A HDD is nearly always a good choice.
+- Blu-ray with archive quality can be useful for long-term storage
+- In a company environment, you should invest in and use tape storage
+- If you want to use an SSD, do some research on your hardware and potential failures
+especially if you want to store data for the long-term.
+- Don't use USB sticks or SD cards. They do not last very long.
+
+### Backup Strategies
+
+- Popular strategy: 3-2-1
+  - 3 copies on 2 different media, 1 offsite copy
+  - general rule: make sure that not all backups are in the same place.
+- Do it regularly
+- One backup should be cold which means you keep it unplugged
+most of the time. Obviously, not when you backup your data.
+- Copies that could fall into the hands of others should be encrypted!
+This is not exclusive for backups but also applies to USB sticks, data in the
+cloud etc.
+
+### Recovery Plan
+- Check if you can recover from your backup; otherwise, it's useless
+- In case you have to recover, check for
+  - Do you have access to your passwords
+  - Do you have all necessary tools
+  - How long does it take to get you back to work?
+
+### Data integrity
+
+- While stored data can get corrupted, which can lead to total or partial
+data loss.
+- Make sure your backup tool checks for data integrity.
+
+
+### Tools and further readings
+- There is a huge selection of tools that help you to automate huge parts
+of the backup process; see the link below. 
+<https://wiki.archlinux.org/title/Synchronization_and_backup_programs>
+
+If you work at JLU there are some tools and solutions already available to you
+that may help you. You can find an overview of the available services
+of the HRZ at the following link( german): https://www.uni-giessen.de/de/fbz/svc/hrz/svc/daten
+
+The research data management website also has a FAQ on the topic, which you can find
+here:
+ <https://www.uni-giessen.de/ub/en/digitales-publizieren-en/researchdata/faq-en#anchor_where-do-I-store-my-data-during-my-work-process>
+
+## Augmented reality in veterinary teaching
+
+Anounced title: Horse skull model in augmented reality
+Presenter: Daria Hennrichs and Viet Duc Vu
+Summary: Christian Krippes
+
+- Both work for NWTmed - "Science and technology in medicine"
+- Interdisciplinary platform for "research-based learning"
+- Provides VR course called "VRmed"
+- Study projects with VR and AR glasses by students
+
+### Reasons for Augmented Reality
+
+Huge benefits in teaching,
+
+- creative - can create content based on local requirements
+- interactive - models can be changed, bones can be removed, etc.
+- accessability of larger objects (e.g., horse skeleton), which otherwise couldn't
+be made accessible to a broader audience due to size, fragility, or other
+limitations.
+- intuitive - zoom and rotate as like a picture
+
+### Goal
+
+Manipulation and observation of the individual bone structures in AR
+
+- Interaction between user and model based on eye-tracking.
+- Interactive skull 
+
+### Techology
+
+- A 3D-model of a horse skull by Prof.Dr.Staszyk.
+- A Microsoft Hololens 2 to view the horse skull
+- Unity Engine to prepare the model to work interactively
+- Mixed Reality Toolkit 3, a toolkit for Unity to enable operation with
+input from the Hololens.
+
+### Eye tracking interaction
+
+- In unity a so called "Object Manipulator" can follow your eye motion (gaze).
+- A C# script processes this information and changes the color of a tooth
+when you focus it. It also presents a panel with detailed information like name, location 
+and material composition.
+
+## Goals for the future 
+
+- Extension of eye tracking
+- Viewpoint display for simultaneous tracking on the computer
+- Improve interaction
+- Add more information to panels
+- Add audio information
+- Enable "sliceable" models