# How is the force in the abdomen measured??

Hi…

I’m working with the intra-abdominal pressure, or better described,
I’m looking at the file that models the abdominal pressure, which is
the Buckle.any. At the same time I’m looking at the slides from
www.anybody.aau.dk. But I can’t understand how the model uses the
volume to calculate the pressure.

1. If you look at the slide called Abdominal pressure implementation,
then there is an equation that defines the total volume. I’m able to
find out where the different components of this equation comes from,
and how they are calculated, but I don’t see an equation that
connects it all into the total volume. 2)And another question if says
in the file Buckle.any that when a force is applied to this volume,
then it becomes an abdominal pressure, but how should that be
understood? They define some pressure nodes in the “center” of pelvis
and thorax where to the force from the abdominal pressure is applied,
but still I don’t get it!!

I hope this is understandable…sometimes it’s a bit difficult to
explain what it is that you exactly don’t understand!!

Helene

Hi Helene

In the buckle.any file there is a linear combination measure named
as

AnyKinMeasureLinComb AbdominalVol= {

This is basically the abdominal volume the equation you are missing
i think is the coefficient matrix named

Coef={

{FDisc1Coef,FDisc2Coef,FDisc3Coef,FDisc4Coef,FDisc5Coef,Fdvdh}
};

This where all the components are added togetherinto a linear
AnyKinMeasureLinComb which is used for this.

The abdominal muscle is applied to the muscle volume measure, this
means that the force from this muscle will be “splitted” into a
number of individual forces. These forces are dependent on the
coefficent vector and the measures being used.

So in words the there will be a force between pelvis and thorax and
forces which will push the buckle forward, and forces which will
push on L1 to L5.

Best regards
SÃ¸ren, AnyBody Support

— In anyscript@yahoogroups.com, “helene.randal” <helenerandal@…>
wrote:
>
> Hi…
>
> I’m working with the intra-abdominal pressure, or better
described,
> I’m looking at the file that models the abdominal pressure, which
is
> the Buckle.any. At the same time I’m looking at the slides from
> www.anybody.aau.dk. But I can’t understand how the model uses the
> volume to calculate the pressure.
> 1) If you look at the slide called Abdominal pressure
implementation,
> then there is an equation that defines the total volume. I’m able
to
> find out where the different components of this equation comes
from,
> and how they are calculated, but I don’t see an equation that
> connects it all into the total volume. 2)And another question if
says
> in the file Buckle.any that when a force is applied to this
volume,
> then it becomes an abdominal pressure, but how should that be
> understood? They define some pressure nodes in the “center” of
pelvis
> and thorax where to the force from the abdominal pressure is
applied,
> but still I don’t get it!!
>
> I hope this is understandable…sometimes it’s a bit difficult to
> explain what it is that you exactly don’t understand!!
>
> Helene
>

Hi SÃ¸ren

Thank you for your reply. I looked up what the AnyKinMeasureLinComp means, and I
see that it needs both the Coefficient matrix and the Constant as an input.
But I don’t understand what F is:

AnyVar F=1;
Coef={
{FDisc1Coef,FDisc2Coef,FDisc3Coef,FDisc4Coef,FDisc5Coef,Fdvdh}
};
Why is it included, is it something that has to be there for the
AnyKinMeasureLinComp, and when it is defined as F=1 is it then a initial
condition as the case with R = 0.12 and H0=0.28, or is it always taking into
account as F=1?

If it’s a force, then it has N as unit , and the Disc1Coef and so on has the
unit m^2, and then I end up with kg*m^3/s^2!!

Okay as you see I’m confused!

Helene

To: anyscript@yahoogroups.comFrom: support@anybodytech.comDate: Sun, 17 Jun 2007
10:52:03 +0000Subject: [AnyScript] Re: How is the force in the abdomen
measured??

Hi HeleneIn the buckle.any file there is a linear combination measure named as
AnyKinMeasureLinComb AbdominalVol= {This is basically the abdominal volume the
equation you are missing i think is the coefficient matrix named
Coef={{FDisc1Coef,FDisc2Coef,FDisc3Coef,FDisc4Coef,FDisc5Coef,Fdvdh}};
This where all the components are added togetherinto a linear equation. If
needed please see the manual for details about the AnyKinMeasureLinComb which is
used for this.The abdominal muscle is applied to the muscle volume measure, this
means that the force from this muscle will be “splitted” into a number of
individual forces. These forces are dependent on the coefficent vector and the
measures being used.So in words the there will be a force between pelvis and
thorax and forces which will push the buckle forward, and forces which will push
on L1 to L5.Please ask again if you have further questions.Best regardsSÃ¸ren,
AnyBody Support— In anyscript@yahoogroups.com, “helene.randal”
<helenerandal@…> wrote:>> Hi…> > I’m working with the intra-abdominal
pressure, or better described, > I’m looking at the file that models the
abdominal pressure, which is > the Buckle.any. At the same time I’m looking at
the slides from > www.anybody.aau.dk. But I can’t understand how the model uses
the > volume to calculate the pressure.> 1) If you look at the slide called
Abdominal pressure implementation, > then there is an equation that defines the
total volume. I’m able to > find out where the different components of this
equation comes from, > and how they are calculated, but I don’t see an equation
that > connects it all into the total volume. 2)And another question if says >
in the file Buckle.any that when a force is applied to this volume, > then it
becomes an abdominal pressure, but how should that be > understood? They define
some pressure nodes in the “center” of pelvis > and thorax where to the force
from the abdominal pressure is applied, > but still I don’t get it!!> > I hope
this is understandable…sometimes it’s a bit difficult to > explain what it is
that you exactly don’t understand!!> > Helene>

Hent den nye Windows Live Messenger!
http://get.live.com/messenger/overview

[Non-text portions of this message have been removed]

Hi Helena

This variable F was used for scaling purposes, when developing the
model, but as you can see it is set to one so it do not have any
influence, it will always stay as one. So it is really something
which should just be removed…

I hope it made it more clear, the abdominal model is one of the most
complex model parts we have, so i can undestand if you are
confused

Best regards
SÃ¸ren

— In anyscript@yahoogroups.com, helene randal petersen
<helenerandal@…> wrote:
>
> Hi SÃ¸ren
>
AnyKinMeasureLinComp means, and I see that it needs both the
Coefficient matrix and the Constant as an input.
> But I don’t understand what F is:
>
> AnyVar F=1;
> Coef={
>
{FDisc1Coef,FDisc2Coef,FDisc3Coef,FDisc4Coef,FDisc5Coef,Fdvdh}
> };
> Why is it included, is it something that has to be there for the
AnyKinMeasureLinComp, and when it is defined as F=1 is it then a
initial condition as the case with R = 0.12 and H0=0.28, or is it
always taking into account as F=1?
>
> If it’s a force, then it has N as unit , and the Disc1Coef and so
on has the unit m^2, and then I end up with kgm^3/s^2!!
>
> Okay as you see I’m confused!
>
> Helene
>
>
> To: anyscript@…: support@…: Sun, 17 Jun 2007 10:52:03
+0000Subject: [AnyScript] Re: How is the force in the abdomen
measured??
>
>
>
> Hi HeleneIn the buckle.any file there is a linear combination
measure named as AnyKinMeasureLinComb AbdominalVol= {This is
basically the abdominal volume the equation you are missing i think
is the coefficient matrix named Coef=
{{F
Disc1Coef,FDisc2Coef,FDisc3Coef,FDisc4Coef,FDisc5Coef,F*dvdh}
}; This where all the components are added togetherinto a linear
AnyKinMeasureLinComb which is used for this.The abdominal muscle is
applied to the muscle volume measure, this means that the force from
this muscle will be “splitted” into a number of individual forces.
These forces are dependent on the coefficent vector and the measures
being used.So in words the there will be a force between pelvis and
thorax and forces which will push the buckle forward, and forces
which will push on L1 to L5.Please ask again if you have further
questions.Best regardsSÃ¸ren, AnyBody Support— In
anyscript@yahoogroups.com, “helene.randal” <helenerandal@> wrote:>>
Hi…> > I’m working with the intra-abdominal pressure, or better
described, > I’m looking at the file that models the abdominal
pressure, which is > the Buckle.any. At the same time I’m looking at
the slides from > www.anybody.aau.dk. But I can’t understand how the
model uses the > volume to calculate the pressure.> 1) If you look
at the slide called Abdominal pressure implementation, > then there
is an equation that defines the total volume. I’m able to > find out
where the different components of this equation comes from, > and
how they are calculated, but I don’t see an equation that > connects
it all into the total volume. 2)And another question if says > in
the file Buckle.any that when a force is applied to this volume, >
then it becomes an abdominal pressure, but how should that be >
understood? They define some pressure nodes in the “center” of
pelvis > and thorax where to the force from the abdominal pressure
is applied, > but still I don’t get it!!> > I hope this is
understandable…sometimes it’s a bit difficult to > explain what
it is that you exactly don’t understand!!> > Helene>
>
>
> _________________________________________________________________
> Hent den nye Windows Live Messenger!
> http://get.live.com/messenger/overview
>
> [Non-text portions of this message have been removed]
>

Hi SÃ¸ren…

Thanks a lot for all your help…now I have one last question!
In the BuckleSupport.any 5 artificial pushing muscles are applied, and they are
said to work with a strength each of 5000 (N?). But I can not find out which
unit these 5000 are in?? Because 5000 N for each seems as a tremendously big
force!

Best regards

Helene

To: anyscript@yahoogroups.comFrom: support@anybodytech.comDate: Thu, 21 Jun 2007
07:07:06 +0000Subject: [AnyScript] Re: How is the force in the abdomen
measured??

Hi HelenaThis variable F was used for scaling purposes, when developing the
model, but as you can see it is set to one so it do not have any influence, it
will always stay as one. So it is really something which should just be
removed…I hope it made it more clear, the abdominal model is one of the most
complex model parts we have, so i can undestand if you are confused ;-)Best
regardsSÃ¸ren— In anyscript@yahoogroups.com, helene randal petersen
<helenerandal@…> wrote:>> Hi SÃ¸ren> > Thank you for your reply. I looked up
what the AnyKinMeasureLinComp means, and I see that it needs both the
Coefficient matrix and the Constant as an input.> But I don’t understand what F
is:> > AnyVar F=1; > Coef={>
{FDisc1Coef,FDisc2Coef,FDisc3Coef,FDisc4Coef,FDisc5Coef,Fdvdh}> };> Why is
it included, is it something that has to be there for the AnyKinMeasureLinComp,
and when it is defined as F=1 is it then a initial condition as the case with R
= 0.12 and H0=0.28, or is it always taking into account as F=1?> > If it’s a
force, then it has N as unit , and the Disc1Coef and so on has the unit m^2, and
then I end up with kgm^3/s^2!!> > Okay as you see I’m confused!> > Helene> > >
To: anyscript@…: support@…: Sun, 17 Jun 2007 10:52:03 +0000Subject:
[AnyScript] Re: How is the force in the abdomen measured??> > > > Hi HeleneIn
the buckle.any file there is a linear combination measure named as
AnyKinMeasureLinComb AbdominalVol= {This is basically the abdominal volume the
equation you are missing i think is the coefficient matrix named
Coef={{F
Disc1Coef,FDisc2Coef,FDisc3Coef,FDisc4Coef,FDisc5Coef,F*dvdh}};
This where all the components are added togetherinto a linear equation. If
needed please see the manual for details about the AnyKinMeasureLinComb which is
used for this.The abdominal muscle is applied to the muscle volume measure, this
means that the force from this muscle will be “splitted” into a number of
individual forces. These forces are dependent on the coefficent vector and the
measures being used.So in words the there will be a force between pelvis and
thorax and forces which will push the buckle forward, and forces which will push
on L1 to L5.Please ask again if you have further questions.Best regardsSÃ¸ren,
AnyBody Support— In anyscript@yahoogroups.com, “helene.randal” <helenerandal@>
wrote:>> Hi…> > I’m working with the intra-abdominal pressure, or better
described, > I’m looking at the file that models the abdominal pressure, which
is > the Buckle.any. At the same time I’m looking at the slides from >
www.anybody.aau.dk. But I can’t understand how the model uses the > volume to
calculate the pressure.> 1) If you look at the slide called Abdominal pressure
implementation, > then there is an equation that defines the total volume. I’m
able to > find out where the different components of this equation comes from, >
and how they are calculated, but I don’t see an equation that > connects it all
into the total volume. 2)And another question if says > in the file Buckle.any
that when a force is applied to this volume, > then it becomes an abdominal
pressure, but how should that be > understood? They define some pressure nodes
in the “center” of pelvis > and thorax where to the force from the abdominal
pressure is applied, > but still I don’t get it!!> > I hope this is
understandable…sometimes it’s a bit difficult to > explain what it is that
you exactly don’t understand!!> > Helene> > > >
__________________________________________________________> Hent den nye Windows
Live Messenger!> http://get.live.com/messenger/overview> > [Non-text portions of
this message have been removed]>

Ring til venner med pc-til-pc-opkald - GRATIS
http://get.live.com/messenger/overview

[Non-text portions of this message have been removed]

Hi Helene

It is a good questions.

You are right that the 5000N is a pretty big force, but this fully
intended. The explanation is that we want to create a unilateral
constraint this can be done these muscles, they can push the buckle
forward. The strength has to be high because we do not want these
muscles to be the “bottleneck” in the muscles recruitment. Using
this high strength they are not close to the activity envelope, and
they work as “almost infinitley strong” unilateral constraint.

In reality it would be better to have real unilateral contraints
without using these muscles, but this is how we can do this
currently.

Best regards
SÃ¸ren AnyBody Support

— In anyscript@yahoogroups.com, helene randal petersen
<helenerandal@…> wrote:
>
> Hi SÃ¸ren…
>
> Thanks a lot for all your help…now I have one last question!
> In the BuckleSupport.any 5 artificial pushing muscles are applied,
and they are said to work with a strength each of 5000 (N?). But I
can not find out which unit these 5000 are in?? Because 5000 N for
each seems as a tremendously big force!
>
> Best regards
>
> Helene
>
>
> To: anyscript@…: support@…: Thu, 21 Jun 2007 07:07:06
+0000Subject: [AnyScript] Re: How is the force in the abdomen
measured??
>
>
>
>
> Hi HelenaThis variable F was used for scaling purposes, when
developing the model, but as you can see it is set to one so it do
not have any influence, it will always stay as one. So it is really
something which should just be removed…I hope it made it more
clear, the abdominal model is one of the most complex model parts we
have, so i can undestand if you are confused ;-)Best regardsSÃ¸ren—
In anyscript@yahoogroups.com, helene randal petersen <helenerandal@>
wrote:>> Hi SÃ¸ren> > Thank you for your reply. I looked up what the
AnyKinMeasureLinComp means, and I see that it needs both the
Coefficient matrix and the Constant as an input.> But I don’t
understand what F is:> > AnyVar F=1; > Coef={>
{FDisc1Coef,FDisc2Coef,FDisc3Coef,FDisc4Coef,FDisc5Coef,Fdvdh}
> };> Why is it included, is it something that has to be there for
the AnyKinMeasureLinComp, and when it is defined as F=1 is it then a
initial condition as the case with R = 0.12 and H0=0.28, or is it
always taking into account as F=1?> > If it’s a force, then it has N
as unit , and the Disc1Coef and so on has the unit m^2, and then I
end up with kgm^3/s^2!!> > Okay as you see I’m confused!> > Helene>
> > To: anyscript@: support@: Sun, 17 Jun 2007 10:52:03
+0000Subject: [AnyScript] Re: How is the force in the abdomen
measured??> > > > Hi HeleneIn the buckle.any file there is a linear
combination measure named as AnyKinMeasureLinComb AbdominalVol=
{This is basically the abdominal volume the equation you are missing
i think is the coefficient matrix named Coef=
{{F
Disc1Coef,FDisc2Coef,FDisc3Coef,FDisc4Coef,FDisc5Coef,F*dvdh}
}; This where all the components are added togetherinto a linear
AnyKinMeasureLinComb which is used for this.The abdominal muscle is
applied to the muscle volume measure, this means that the force from
this muscle will be “splitted” into a number of individual forces.
These forces are dependent on the coefficent vector and the measures
being used.So in words the there will be a force between pelvis and
thorax and forces which will push the buckle forward, and forces
which will push on L1 to L5.Please ask again if you have further
questions.Best regardsSÃ¸ren, AnyBody Support— In
anyscript@yahoogroups.com, “helene.randal” <helenerandal@> wrote:>>
Hi…> > I’m working with the intra-abdominal pressure, or better
described, > I’m looking at the file that models the abdominal
pressure, which is > the Buckle.any. At the same time I’m looking at
the slides from > www.anybody.aau.dk. But I can’t understand how the
model uses the > volume to calculate the pressure.> 1) If you look
at the slide called Abdominal pressure implementation, > then there
is an equation that defines the total volume. I’m able to > find out
where the different components of this equation comes from, > and
how they are calculated, but I don’t see an equation that > connects
it all into the total volume. 2)And another question if says > in
the file Buckle.any that when a force is applied to this volume, >
then it becomes an abdominal pressure, but how should that be >
understood? They define some pressure nodes in the “center” of
pelvis > and thorax where to the force from the abdominal pressure
is applied, > but still I don’t get it!!> > I hope this is
understandable…sometimes it’s a bit difficult to > explain what
it is that you exactly don’t understand!!> > Helene> > > >
__________________________________________________________> Hent den
nye Windows Live Messenger!> http://get.live.com/messenger/overview>
> [Non-text portions of this message have been removed]>
>
>
> _________________________________________________________________
> Ring til venner med pc-til-pc-opkald - GRATIS
> http://get.live.com/messenger/overview
>
> [Non-text portions of this message have been removed]
>