diff --git a/src/snnUtil.jl b/src/snnUtil.jl
index 00bbae2..cef5a25 100644
--- a/src/snnUtil.jl
+++ b/src/snnUtil.jl
@@ -106,7 +106,7 @@ function mergeLearnWeight!(wRec::AbstractArray, exInType, wRecChange::AbstractAr
                             synapticActivityCounter::AbstractArray, 
                             synapseReconnectDelay::AbstractArray)
     wRecSigned = exInType .* wRec
-    # -0.0 == 0.0 but isequal() implement as -0.0 != 0.0, so Ineed to get rid of -0.0 manually
+    # -0.0 == 0.0 but isequal() implement as -0.0 != 0.0, so I need to get rid of -0.0 manually
     GeneralUtils.replaceElements!(wRecSigned, -0, 0)  
     # println("wRec 2 $(size(wRecSigned)) ", wRecSigned[:,:,1,1])
     # println("wRecChange ", wRecChange[:,:,1,1])
@@ -121,18 +121,17 @@ function mergeLearnWeight!(wRec::AbstractArray, exInType, wRecChange::AbstractAr
     flipsign = (!isequal).(originalsign, newsign)
     # println("flipsign ", flipsign[:,:,1,1])
     nonflipsign = (isequal).(originalsign, newsign)
-    wRec .= abs.(wRecSigned)
+    wRec .= abs.(wRecSigned)    # wRec store magnitude only, sign is at exInType
 
-    println("wRec 4 $(size(wRec)) ", wRec[:,:,1,1])
+    # println("wRec 4 $(size(wRec)) ", wRec[:,:,1,1])
     GeneralUtils.replaceElements!(flipsign, 1, wRec, 0.0) # negative synapse get pruned
-    println("wRec 5 $(size(wRec)) ", wRec[:,:,1,1])
-    GeneralUtils.replaceElements!(flipsign, 1, synapticActivityCounter, -0.1)
-    println("synapticActivityCounter ", synapticActivityCounter[:,:,1,1])   #BUG why 0.0 alot?
+    # println("wRec 5 $(size(wRec)) ", wRec[:,:,1,1])
+    GeneralUtils.replaceElements!(flipsign, 1, synapticActivityCounter, 0)
     # set pruned synapse to random wait time
     waittime = rand((1:1000), size(wRec)) .* flipsign  # synapse's random wait time to reconnect
     # synapseReconnectDelay counting mode when value is negative hence .* -1
     synapseReconnectDelay .= (synapseReconnectDelay .* nonflipsign) .+ (waittime .* -1)
-    println("synapseReconnectDelay ", synapseReconnectDelay[:,:,1,1])
+    # println("synapseReconnectDelay ", synapseReconnectDelay[:,:,1,1])   #TODO check value
     error("DEBUG ->  mergeLearnWeight!")
 end
 
@@ -151,7 +150,7 @@ function growRepeatedPath!(wRec, synapticActivityCounter, eta)  #BUG wRec get al
     wRec .*= mask_3
 
     # -w, synapse with less than 10% of avg activity get reduced weight by eta
-    mask_less = GeneralUtils.isBetween.(synapticActivityCounter, 0.0, lowerlimit)   # 1st criteria
+    mask_less = GeneralUtils.isBetween.(synapticActivityCounter, 0, lowerlimit)   # 1st criteria
     mask_3 = GeneralUtils.allTrue.(mask_activeSynapse, mask_less)
     mask_4 = mask_3 .* (1 .- eta)    # minor activity synapse weight will be reduced by eta
     wRec .*= mask_4
@@ -171,7 +170,7 @@ function pruneSynapse!(wRec, synapticActivityCounter, synapseReconnectDelay)
     mask_notweak = (!GeneralUtils.isBetween).(wRec, 0.0, 0.01)
     wRec .*= mask_notweak   # all marked weak synapse weight need to be 0.0 i.e. pruned
     # all weak synapse activity are reset
-    GeneralUtils.replaceElements!(mask_weak, 1, synapticActivityCounter, -0.1)
+    GeneralUtils.replaceElements!(mask_weak, 1, synapticActivityCounter, 0)
     # set pruned synapse to random wait time
     r = rand((1:1000), size(wRec)) .* mask_weak  # synapse's random wait time to reconnect
     # synapseReconnectDelay counting mode when value is negative hence .* -1
@@ -190,7 +189,7 @@ function rewireSynapse!(wRec::AbstractArray, neuronInactivityCounter::AbstractAr
             w = random_wRec(i1,i2,1,synapseConnectionNumber)
             wRec[:,:,i,i4] .= w
 
-            a = similar(w) .= -0.1    # synapseConnectionNumber of this neuron
+            a = similar(w) .= -0.1    # temp matrix use to put -0.1 into synapseReconnectDelay
             mask = (!iszero).(w)
             GeneralUtils.replaceElements!(mask, 1, a, 0)
             synapseReconnectDelay[:,:,i,i4] = a
diff --git a/src/type.jl b/src/type.jl
index 74c5465..5dab2c8 100644
--- a/src/type.jl
+++ b/src/type.jl
@@ -233,13 +233,8 @@ function kfn_1(params::Dict; device=cpu)
     # count subscribed synapse activity, just like epsilonRec but without decay.
     # use to adjust weight based on how often neural pathway is used
     kfn.lif_synapseReconnectDelay = (similar(kfn.lif_wRec) .= -0.1)  # -0.1 for non-sub conn
+    kfn.lif_synapticActivityCounter = (similar(kfn.lif_wRec) .= -0.1)  # -0.1 for non-sub conn
     
-    kfn.lif_synapticActivityCounter = Array(similar(kfn.lif_wRec) .= -0.1)  # -0.1 for non-sub conn
-    mask = Array((!iszero).(kfn.lif_wRec))
-    # initial value subscribed conn
-    GeneralUtils.replaceElements!(mask, 1, kfn.lif_synapticActivityCounter, 0.0)
-    kfn.lif_synapticActivityCounter = kfn.lif_synapticActivityCounter   |> device
-
     kfn.lif_arrayProjection4d = (similar(kfn.lif_wRec) .= 1)      
     kfn.lif_recSignal = (similar(kfn.lif_wRec) .= 0)                  
     kfn.lif_exInType = (similar(kfn.lif_wRec) .= 0)                  
@@ -284,12 +279,7 @@ function kfn_1(params::Dict; device=cpu)
     kfn.alif_firingTargetFrequency = (similar(kfn.alif_wRec) .= 0.1)       
     kfn.alif_neuronInactivityCounter = (similar(kfn.alif_wRec) .= 0)        
     kfn.alif_synapseReconnectDelay = (similar(kfn.alif_wRec) .= -0.1)    # -0.1 for non-sub conn
-
-    kfn.alif_synapticActivityCounter = Array(similar(kfn.alif_wRec) .= -0.1)  # -0.1 for non-sub conn
-    mask = Array((!iszero).(kfn.alif_wRec))
-    # initial value subscribed conn
-    GeneralUtils.replaceElements!(mask, 1, kfn.alif_synapticActivityCounter, 0.0)
-    kfn.alif_synapticActivityCounter = kfn.alif_synapticActivityCounter   |> device
+    kfn.alif_synapticActivityCounter = (similar(kfn.alif_wRec) .= 0)
 
     kfn.alif_arrayProjection4d = (similar(kfn.alif_wRec) .= 1)      
     kfn.alif_recSignal = (similar(kfn.alif_wRec) .= 0)