Lidast

Lidast

You can download the Latest Version here. If this is your first time installing Lidast, you might also check Hardware Requirements and our Installation Guide. Principles on how Lidast works are described in the Software Manual. Documentation of the Development can be found at Previous Versions

For developers: You might get access to the Source Code on request by contacting Science Data Services

Download

Latest Version

Version	File	ReleaseNotes
1.0.13	Download Lidast 1.0.13	abcdef.txt

Previous Versions

Version	File	ReleaseNotes
1.0.10	on request	abcdef.txt

Changelog'

Date	Version	Changes applied
2015-12-06	Version 1.0.12	Help Texts added, Sub-Herd Selection
2015-10-08	Version 0.9.13 Build 3	Create APE Models

Requirements

This Software is designed to work on very basic Hardware. As long as you have a relatively new and regularly updated Windows, the Lidast Client will most probably work on your computer. Most important is a working internet connection since all access to data works via Internet.

If you enocunter any problems, you might contact us for assistance.

Hard and Software Requirements

System Architecture	This system runs on 32 and 64bit Systems
Operation System	Microsoft Windows
Win Version	Win 7, Win 8, Win 10
HDD Space required	150MB
RAM	2 GB
Misc	Requires active Internet Connection

Manual

Utilize Data

When creating a model dataset, you have to choose the animals from which the model dataset will be calculated from. The general unit for processing data in Lidast is a herd. You can not group more than one herd to create a dataset, based on animals across different herds. However, if you wish to analyze different sub-sets of animals from a herd, you can choose individual animals from a herd. For example one may compare the productivity of the top performers against the low performers. The next paragraph describes how the selection of sub-herds for model-creation is working. If you wish to work on complete herds, you may skip the next part.

Choose a sub-Herd

When creating a model file for PRY or APE (others may follow), you now can select individual animals from your herd in order to make a comparison of animal-groups from within your herd.

How to use:

Click on "Select Sub-Herd" to display a table with all your female breeding animals.

The now appearing table shows all female breeding animals in your herd with some reproductive performance data.

On top you have the "Time Unit Selector". This is a temporary selection for an appropriate display of your date in this window. It has no effect on the PRY Model creator, where you might select another unit in a later dialogue. So you might change this time unit, also on-the-fly when working with this table, according to your needs.

The Breeding-Female Table

Column"	Content
ID	The female breeding Animals unique ID
Name	The female breeding Animals Name as defined by you
AAFP	The age at first parturition - encoded in the time-unit that you have selected above
PartInt avg	The average parturition interval, taking into consideration all parturitions of this animal
PartInt min/max	The lowest and highest parturition interval of this female breeding animal
LTP	Life Time Production - The animals total number of live-born offspring in the table

You might sort your data by column

And select individual animals from the list for the creation of a PRY or APE model dataset

Rules of this table

1. There is no PartInt for animals which only had one parturition
2. When choosing animals from "Sub-Herd" only those offspring will be used in the model which have a mother defined in the table (see DataQuality Issues)

Note how the number of female/male animals is changing when selecting/deselecting animals from the list

When finished, you may proceed with your individually selected herd by clicking ->next

Create an APE Seed Herd

1.) You find the APE File Creator in the Menu at Migrate -> Create APE Model (See picture below).

2. Clicking on that menu point, the dialogue of the APE File Creator is opening

3. You might select the herd which should serve as the base population for the APE Model Simulation

Day of Simulation

How you can use DayOfSimulation to validate your model parametrisation

4. You can select the Date of Simulation. Normally this can be left at todays date. But if you want to simulate a herd based on the actual-state from a previous date, you might select another date here. The impact of selecting a past date is:

• Only animals alive at the given date will be considered
• Offspring will only considered if born before the selected date

By changing Day of Simulation to the past you are able to compare simulation vs. reality. By doing so you might validate and adjust your parameterization and/or check interviews with farmers on consistency. See picture below on how you are able to validate your parameterization by comparing the final herd-characteristics (size,composition and so on) between a simulated and an interviewed or observed herd.

How To:

When creating a model you might choose a Date of Simulation in the Past. Note that the number of animals - as well as the composition of the herd - might most proably change and will be lower than the actual herd, except you are working with static herds with no growth. Considerations on what DayOfSimulation should be used are:

Birth of first animal in your recordings

t(0)

DayOfSimulation

t(1)

Day of Interview

t(2)

Today

t(3)

What is the generation interval of your species in the given productive system?

delta(t) should be at least 1-2 generation intervals.

Choose File Name

INI Sample File

5. You need to choose a File-Name to save the created Data. You might use the "Select" Button to choose a Path to easily find the created File. Since PRY-APE in its current Version is a DOS Program, you might only use basic-Characters and a limited length on your File-Name. File-Names which do not meet the given restrictions will be corrected automatically, in this case you will receive a Warning.

6. After everything is setup, you might be ready to create the Initial Seed Herd File. When clicking on write File, the Source-Database will be taken to write an APE Initial Seed Herd Data File which is compatible with the PRY-APE Dos Module. You will find your file at the stated directory on your hard disc.

Things to Consider

There is no quality Control - If you have Error in your Data (Date of Offspring born is before BirthDate of Mother etc.), this data will corruptyl be transferred to the APE-File, you might encounter Errors in simulating

Since there is no need of considering male animals in the regular PRY (Version 3.x), you might only have female Livestock imported. Ths will lead to a strong bias when Simulating your herd wit APE. It is importand to have saved an actual image of your herd, including all livestock, whether male or female

• Previous Versions
• Hardware Requirements
• Installation Guide
• User Guide
• Download PRY
• Back to the Start Page