--- a
+++ b/RadOnly/sys_ndRadNordic.m
@@ -0,0 +1,49 @@
+% In this code we include logistic growth of normal cells and PM cells
+% along with radiation effect from Gibins work.
+
+function xprime = sys_ndRadNordic(t,x,D)
+
+xprime = zeros(2,1);
+
+% Parameters that are fixed
+
+N = 10^9; % Sachs
+lambda = 0.40; %Sachs
+r = 0.85; 
+
+K = 20;        
+d = D/K;       
+
+tau = 0.02;   % radiation time- 30 minutes = 0.02 days
+
+alpha = 0.25; % Damien Weber et al. 
+gamma = 10^(-9); % (d/tau) is the dose rate
+
+    if(t<=K+tau)
+        t-floor(t);
+        if (t-floor(t)<=tau)
+            t;
+            
+            xprime(1) = lambda*x(1)*(1-x(1)) - alpha*(d/tau)*x(1) - gamma*(d/tau)*x(1);
+            xprime(2) = r*lambda*x(2)*(1-x(1)) - alpha*(d/tau)*x(2) + gamma*(d/tau)*N*x(1);
+        else
+
+            xprime(1) = lambda*x(1)*(1-x(1));
+            xprime(2) = r*lambda*x(2)*(1-x(1));
+        end
+    else
+        
+        xprime(1) = lambda*x(1)*(1-x(1));
+        xprime(2) = r*lambda*x(2)*(1-x(1));
+        
+    end
+
+
+
+
+
+
+
+
+
+