diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/AllPduReceiver.java b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/AllPduReceiver.java
deleted file mode 100644
index d392171749dbe10d24091aaa45ddf654f1af7133..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/AllPduReceiver.java
+++ /dev/null
@@ -1,80 +0,0 @@
-package MV3500Cohort2019JulySeptember.homework4.Yurkovich;
-
-import java.net.*;
-import java.io.*;
-
-import edu.nps.moves.dis7.*;
-import edu.nps.moves.dis7.enumerations.*;
-import edu.nps.moves.dis7.util.*;
-
-public class AllPduReceiver
-{
-  public static final int DEFAULT_MULTICAST_PORT = AllPduSender.DEFAULT_MULTICAST_PORT;
-  public static final String DEFAULT_MULTICAST_ADDRESS = AllPduSender.DEFAULT_MULTICAST_ADDRESS;
-  public static final boolean USE_FAST_ESPDU = false;
-
-  public static void main(String args[])
-  {
-    PduFactory factory;
-    MulticastSocket socket;
-    InetAddress address;
-    DatagramPacket packet;
-
-    try {
-      System.out.println("DisExamplesOpenDis7.AllPduReceiver started...");
-      if (args.length == 2) {
-        socket = new MulticastSocket(Integer.parseInt(args[0]));
-        address = InetAddress.getByName(args[1]);
-      }
-      else {
-        System.out.println("Usage:   AllPduReceiver <port> <multicast group>");
-        System.out.println("Default: AllPduReceiver " + DEFAULT_MULTICAST_PORT + "   " + DEFAULT_MULTICAST_ADDRESS);
-        socket = new MulticastSocket(DEFAULT_MULTICAST_PORT);
-        address = InetAddress.getByName(DEFAULT_MULTICAST_ADDRESS);
-      }
-      socket.joinGroup(address);
-
-      factory = new PduFactory();
-
-      while (true) // Loop infinitely, receiving datagrams
-      {
-        byte buffer[] = new byte[1500]; // typical MTU size
-
-        packet = new DatagramPacket(buffer, buffer.length); // reset
-
-        socket.receive(packet);
-
-        Pdu pdu = factory.createPdu(packet.getData());
-        if (pdu != null) {
-          DISPDUType currentPduType = pdu.getPduType(); //short  currentPduType = pdu.getPduType();
-          String currentPduTypeName = pdu.getClass().getName();
-          DISProtocolFamily currentProtocolFamilyID = pdu.getProtocolFamily(); //short  currentProtocolFamilyID = pdu.getProtocolFamily();
-          String currentPduFamilyName = pdu.getClass().getSuperclass().getSimpleName();
-
-          StringBuilder message = new StringBuilder();
-          message.append("received DIS PDU ");
-          if (currentPduType.getValue() < 10)
-            message.append(" ");
-          message.append(currentPduType.getValue());
-          String currentPduTypePadded     = String.format("%-34s", currentPduType); // - indicates right padding of whitespace
-          message.append(" " ).append(currentPduTypePadded);
-          String currentPduTypeNamePadded = String.format("%-49s", currentPduTypeName); // - indicates right padding of whitespace
-          message.append(" of type ").append(currentPduTypeNamePadded); // package.class name
-          message.append(" (protocolFamily ").append(currentProtocolFamilyID);
-//        message.append(" ").append(currentPduFamilyName); // class name is also available
-         message.append(")");
-          System.out.println(message.toString());
-        }
-        else
-          System.out.println("received packet but pdu is null, packet.getData().length=" + packet.getData().length + ", error...");
-      }
-    }
-    catch (IOException e) {
-      System.out.println("Problem with DisExamplesOpenDis7.AllPduReceiver, see exception trace:");
-      System.out.println(e);
-    }
-    finally {
-      System.out.println("DisExamplesOpenDis7.AllPduReceiver complete.");
-    }
-  }
-}
diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/AllPduReceiverLog.txt b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/AllPduReceiverLog.txt
deleted file mode 100644
index f4b8b485d888ff06fddd51dcde9e6c93237f4e68..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/AllPduReceiverLog.txt
+++ /dev/null
@@ -1,85 +0,0 @@
-Invocation instructions:
-1. run or debug AllPduReceiver.java
-2. send PDUs from another program such as AllPduSender.java (shown here)
-3. kill process console when complete.
-
-Program response:
-
-===================================================
-
-DisExamplesOpenDis7.AllPduReceiver started...
-Usage:   AllPduReceiver <port> <multicast group>
-Default: AllPduReceiver 3000   239.1.2.3
-received DIS PDU  1 ENTITY_STATE                       of type edu.nps.moves.dis7.EntityStatePdu                 (protocolFamily ENTITY_INFORMATION_INTERACTION)
-received DIS PDU  2 FIRE                               of type edu.nps.moves.dis7.FirePdu                        (protocolFamily WARFARE)
-received DIS PDU  3 DETONATION                         of type edu.nps.moves.dis7.DetonationPdu                  (protocolFamily WARFARE)
-received DIS PDU  4 COLLISION                          of type edu.nps.moves.dis7.CollisionPdu                   (protocolFamily ENTITY_INFORMATION_INTERACTION)
-received DIS PDU  5 SERVICE_REQUEST                    of type edu.nps.moves.dis7.ServiceRequestPdu              (protocolFamily LOGISTICS)
-received DIS PDU  6 RESUPPLY_OFFER                     of type edu.nps.moves.dis7.ResupplyOfferPdu               (protocolFamily LOGISTICS)
-received DIS PDU  7 RESUPPLY_RECEIVED                  of type edu.nps.moves.dis7.ResupplyReceivedPdu            (protocolFamily LOGISTICS)
-received DIS PDU  8 RESUPPLY_CANCEL                    of type edu.nps.moves.dis7.ResupplyCancelPdu              (protocolFamily LOGISTICS)
-received DIS PDU  9 REPAIR_COMPLETE                    of type edu.nps.moves.dis7.RepairCompletePdu              (protocolFamily LOGISTICS)
-received DIS PDU 10 REPAIR_RESPONSE                    of type edu.nps.moves.dis7.RepairResponsePdu              (protocolFamily LOGISTICS)
-received DIS PDU 11 CREATE_ENTITY                      of type edu.nps.moves.dis7.CreateEntityPdu                (protocolFamily SIMULATION_MANAGEMENT)
-received DIS PDU 12 REMOVE_ENTITY                      of type edu.nps.moves.dis7.RemoveEntityPdu                (protocolFamily SIMULATION_MANAGEMENT)
-received DIS PDU 13 START_RESUME                       of type edu.nps.moves.dis7.StartResumePdu                 (protocolFamily SIMULATION_MANAGEMENT)
-received DIS PDU 14 STOP_FREEZE                        of type edu.nps.moves.dis7.StopFreezePdu                  (protocolFamily SIMULATION_MANAGEMENT)
-received DIS PDU 15 ACKNOWLEDGE                        of type edu.nps.moves.dis7.AcknowledgePdu                 (protocolFamily SIMULATION_MANAGEMENT)
-received DIS PDU 16 ACTION_REQUEST                     of type edu.nps.moves.dis7.ActionRequestPdu               (protocolFamily SIMULATION_MANAGEMENT)
-received DIS PDU 17 ACTION_RESPONSE                    of type edu.nps.moves.dis7.ActionResponsePdu              (protocolFamily SIMULATION_MANAGEMENT)
-received DIS PDU 18 DATA_QUERY                         of type edu.nps.moves.dis7.DataQueryPdu                   (protocolFamily SIMULATION_MANAGEMENT)
-received DIS PDU 19 SET_DATA                           of type edu.nps.moves.dis7.SetDataPdu                     (protocolFamily SIMULATION_MANAGEMENT)
-received DIS PDU 20 DATA                               of type edu.nps.moves.dis7.DataPdu                        (protocolFamily SIMULATION_MANAGEMENT)
-received DIS PDU 21 EVENT_REPORT                       of type edu.nps.moves.dis7.EventReportPdu                 (protocolFamily SIMULATION_MANAGEMENT)
-received DIS PDU 22 COMMENT                            of type edu.nps.moves.dis7.CommentPdu                     (protocolFamily SIMULATION_MANAGEMENT)
-received DIS PDU 23 ELECTROMAGNETIC_EMISSION           of type edu.nps.moves.dis7.ElectromagneticEmissionPdu     (protocolFamily DISTRIBUTED_EMISSION_REGENERATION)
-received DIS PDU 24 DESIGNATOR                         of type edu.nps.moves.dis7.DesignatorPdu                  (protocolFamily DISTRIBUTED_EMISSION_REGENERATION)
-received DIS PDU 25 TRANSMITTER                        of type edu.nps.moves.dis7.TransmitterPdu                 (protocolFamily RADIO_COMMUNICATIONS)
-received DIS PDU 26 SIGNAL                             of type edu.nps.moves.dis7.SignalPdu                      (protocolFamily RADIO_COMMUNICATIONS)
-received DIS PDU 27 RECEIVER                           of type edu.nps.moves.dis7.ReceiverPdu                    (protocolFamily RADIO_COMMUNICATIONS)
-received DIS PDU 28 IDENTIFICATION_FRIEND_OR_FOE       of type edu.nps.moves.dis7.IFFPdu                         (protocolFamily DISTRIBUTED_EMISSION_REGENERATION)
-received DIS PDU 29 UNDERWATER_ACOUSTIC                of type edu.nps.moves.dis7.UnderwaterAcousticPdu          (protocolFamily DISTRIBUTED_EMISSION_REGENERATION)
-received DIS PDU 30 SUPPLEMENTAL_EMISSION_ENTITY_STATE of type edu.nps.moves.dis7.SEESPdu                        (protocolFamily DISTRIBUTED_EMISSION_REGENERATION)
-received DIS PDU 31 INTERCOM_SIGNAL                    of type edu.nps.moves.dis7.IntercomSignalPdu              (protocolFamily RADIO_COMMUNICATIONS)
-received DIS PDU 32 INTERCOM_CONTROL                   of type edu.nps.moves.dis7.IntercomControlPdu             (protocolFamily RADIO_COMMUNICATIONS)
-received DIS PDU 33 AGGREGATE_STATE                    of type edu.nps.moves.dis7.AggregateStatePdu              (protocolFamily ENTITY_MANAGEMENT)
-received DIS PDU 34 ISGROUPOF                          of type edu.nps.moves.dis7.IsGroupOfPdu                   (protocolFamily ENTITY_MANAGEMENT)
-received DIS PDU 35 TRANSFER_OWNERSHIP                 of type edu.nps.moves.dis7.TransferOwnershipPdu           (protocolFamily ENTITY_MANAGEMENT)
-received DIS PDU 36 ISPARTOF                           of type edu.nps.moves.dis7.IsPartOfPdu                    (protocolFamily ENTITY_MANAGEMENT)
-received DIS PDU 37 MINEFIELD_STATE                    of type edu.nps.moves.dis7.MinefieldStatePdu              (protocolFamily MINEFIELD)
-received DIS PDU 38 MINEFIELD_QUERY                    of type edu.nps.moves.dis7.MinefieldQueryPdu              (protocolFamily MINEFIELD)
-received DIS PDU 39 MINEFIELD_DATA                     of type edu.nps.moves.dis7.MinefieldDataPdu               (protocolFamily MINEFIELD)
-received DIS PDU 40 MINEFIELD_RESPONSE_NACK            of type edu.nps.moves.dis7.MinefieldResponseNACKPdu       (protocolFamily MINEFIELD)
-received DIS PDU 41 ENVIRONMENTAL_PROCESS              of type edu.nps.moves.dis7.EnvironmentalProcessPdu        (protocolFamily SYNTHETIC_ENVIRONMENT)
-received DIS PDU 42 GRIDDED_DATA                       of type edu.nps.moves.dis7.GriddedDataPdu                 (protocolFamily SYNTHETIC_ENVIRONMENT)
-received DIS PDU 43 POINT_OBJECT_STATE                 of type edu.nps.moves.dis7.PointObjectStatePdu            (protocolFamily SYNTHETIC_ENVIRONMENT)
-received DIS PDU 44 LINEAR_OBJECT_STATE                of type edu.nps.moves.dis7.LinearObjectStatePdu           (protocolFamily SYNTHETIC_ENVIRONMENT)
-received DIS PDU 45 AREAL_OBJECT_STATE                 of type edu.nps.moves.dis7.ArealObjectStatePdu            (protocolFamily SYNTHETIC_ENVIRONMENT)
-received DIS PDU 46 TIME_SPACE_POSITION_INFORMATION    of type edu.nps.moves.dis7.TSPIPdu                        (protocolFamily LIVE_ENTITY_LE_INFORMATION_INTERACTION)
-received DIS PDU 47 APPEARANCE                         of type edu.nps.moves.dis7.AppearancePdu                  (protocolFamily LIVE_ENTITY_LE_INFORMATION_INTERACTION)
-received DIS PDU 48 ARTICULATED_PARTS                  of type edu.nps.moves.dis7.ArticulatedPartsPdu            (protocolFamily LIVE_ENTITY_LE_INFORMATION_INTERACTION)
-received DIS PDU 49 LIVE_ENTITY_FIRE                   of type edu.nps.moves.dis7.LEFirePdu                      (protocolFamily LIVE_ENTITY_LE_INFORMATION_INTERACTION)
-received DIS PDU 50 LIVE_ENTITY_DETONATION             of type edu.nps.moves.dis7.LEDetonationPdu                (protocolFamily LIVE_ENTITY_LE_INFORMATION_INTERACTION)
-received DIS PDU 51 CREATE_ENTITY_RELIABLE             of type edu.nps.moves.dis7.CreateEntityReliablePdu        (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 52 REMOVE_ENTITY_RELIABLE             of type edu.nps.moves.dis7.RemoveEntityReliablePdu        (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 53 START_RESUME_RELIABLE              of type edu.nps.moves.dis7.StartResumeReliablePdu         (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 54 STOP_FREEZE_RELIABLE               of type edu.nps.moves.dis7.StopFreezeReliablePdu          (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 55 ACKNOWLEDGE_RELIABLE               of type edu.nps.moves.dis7.AcknowledgeReliablePdu         (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 56 ACTION_REQUEST_RELIABLE            of type edu.nps.moves.dis7.ActionRequestReliablePdu       (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 57 ACTION_RESPONSE_RELIABLE           of type edu.nps.moves.dis7.ActionResponseReliablePdu      (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 58 DATA_QUERY_RELIABLE                of type edu.nps.moves.dis7.DataQueryReliablePdu           (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 59 SET_DATA_RELIABLE                  of type edu.nps.moves.dis7.SetDataReliablePdu             (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 60 DATA_RELIABLE                      of type edu.nps.moves.dis7.DataReliablePdu                (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 61 EVENT_REPORT_RELIABLE              of type edu.nps.moves.dis7.EventReportReliablePdu         (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 62 COMMENT_RELIABLE                   of type edu.nps.moves.dis7.CommentReliablePdu             (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 63 RECORD_RELIABLE                    of type edu.nps.moves.dis7.RecordReliablePdu              (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 64 SET_RECORD_RELIABLE                of type edu.nps.moves.dis7.SetRecordReliablePdu           (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 65 RECORD_QUERY_RELIABLE              of type edu.nps.moves.dis7.RecordQueryReliablePdu         (protocolFamily SIMULATION_MANAGEMENT_WITH_RELIABILITY)
-received DIS PDU 66 COLLISION_ELASTIC                  of type edu.nps.moves.dis7.CollisionElasticPdu            (protocolFamily ENTITY_INFORMATION_INTERACTION)
-received DIS PDU 67 ENTITY_STATE_UPDATE                of type edu.nps.moves.dis7.EntityStateUpdatePdu           (protocolFamily ENTITY_INFORMATION_INTERACTION)
-received DIS PDU 68 DIRECTED_ENERGY_FIRE               of type edu.nps.moves.dis7.DirectedEnergyFirePdu          (protocolFamily WARFARE)
-received DIS PDU 69 ENTITY_DAMAGE_STATUS               of type edu.nps.moves.dis7.EntityDamageStatusPdu          (protocolFamily WARFARE)
-received DIS PDU 70 INFORMATION_OPERATIONS_ACTION      of type edu.nps.moves.dis7.InformationOperationsActionPdu (protocolFamily INFORMATION_OPERATIONS)
-received DIS PDU 71 INFORMATION_OPERATIONS_REPORT      of type edu.nps.moves.dis7.InformationOperationsReportPdu (protocolFamily INFORMATION_OPERATIONS)
-received DIS PDU 72 ATTRIBUTE                          of type edu.nps.moves.dis7.AttributePdu                   (protocolFamily ENTITY_INFORMATION_INTERACTION)
-BUILD STOPPED (total time: 53 seconds)
diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/AllPduSender.java b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/AllPduSender.java
deleted file mode 100755
index 7f61aba447176c373bb54da774873f606f815158..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/AllPduSender.java
+++ /dev/null
@@ -1,449 +0,0 @@
-package MV3500Cohort2019JulySeptember.homework4.Yurkovich;
-
-import java.io.*;
-import java.net.*;
-import java.util.*;
-
-import edu.nps.moves.dis7.*;
-import edu.nps.moves.dis7.enumerations.*;
-
-/**
- * This is an example that sends many/most types of PDUs. Useful for testing standards
- * compliance or getting a full set of PDUs. It also writes the generated PDUs to an XML file.
- * Adapted from OpenDIS library example package edu.nps.moves.examples
- *
- * @author DMcG
- * @version $Id:$
- */
-public class AllPduSender
-{
-    /** Default multicast group address we send on. */
-    public static final String DEFAULT_MULTICAST_ADDRESS = "239.1.2.3";
-	
-    /** Default multicast port used, matches Wireshark DIS capture default */
-    public static final int    DEFAULT_MULTICAST_PORT    = 3000;
-	
-    private int port;
-    InetAddress multicastAddress;
-
-    public AllPduSender(int port, String multicast) {
-        try
-		{
-            this.port = port;
-            multicastAddress = InetAddress.getByName(multicast);
-            if (!multicastAddress.isMulticastAddress())
-			{
-                System.out.println("Not a multicast address: " + multicast);
-            }
-        } 
-		catch (UnknownHostException e) {
-            System.out.println("Unable to open socket: " + e);
-        }
-    }
-
-    public void run()
-	{
-		System.out.println("DisExamplesOpenDis7.AllPduSender started...");
-        try
-        {
-            System.out.println("Generate PDUs and note issues, if any...");
-            List<Pdu> generatedPdusList = new ArrayList<>();
-
-            // Loop through all the enumerated PDU types, create a PDU for each type,
-            // add that PDU to generatedPdusList, and send each one
-            for (DISPDUType pdu : DISPDUType.values()) 
-			{
-//                System.out.println("PDU " + pdu.getValue() + " " + pdu.name() + " " + pdu.getDescription()); // diagnostic
-
-                Pdu aPdu = null; // edu.​nps.​moves7.​dis.PDU superclass for all PDUs, in preparation for custom assignment
-                
-                try {
-                    switch (pdu) // using enumeration values from edu.​nps.​moves.​dis7.​enumerations.​DISPDUType
-                    {
-                        case OTHER: // 0
-                            System.out.println ("*** Note: DISPDUType." + pdu.name() + " not supported"); // TODO why was this received?
-                            // nothing to send
-                            break;
-
-                        case ENTITY_STATE: // 1 
-                            aPdu = new EntityStatePdu();
-                            
-                            EntityStatePdu espdu = (EntityStatePdu) aPdu;
-                            EntityMarking entityMarking = new EntityMarking ();
-                            entityMarking.setCharacters("AllPduSender".getBytes());   //entityMarking.setCharacters(Byte.valueOf("0")); // 11 characters max?
-
-                            espdu.setMarking(entityMarking);
-                            Vector3Double espduLocation = new Vector3Double();
-                            espduLocation.setX(1.0);
-                            espduLocation.setY(2.0);
-                            espduLocation.setZ(3.0);
-                            espdu.setEntityLocation(espduLocation);
-                            // it is important to identify questions as you think of them
-                            // TODO how to set azimuth, i.e. course direction over ground?
-                            break;
-
-                        case FIRE: // 2
-                            aPdu = new FirePdu();
-                            break;
-
-                        case DETONATION: // 3
-                            aPdu = new DetonationPdu();
-                            break;
-
-                        case COLLISION: // 4
-                            aPdu = new CollisionPdu();
-                            break;
-
-                        case SERVICE_REQUEST: // 5
-                            aPdu = new ServiceRequestPdu();
-                            break;
-
-                        case RESUPPLY_OFFER: // 6
-                            aPdu = new ResupplyOfferPdu();
-                            break;
-
-                        case RESUPPLY_RECEIVED: // 7
-                            aPdu = new ResupplyReceivedPdu();
-                            break;
-
-                        case RESUPPLY_CANCEL: //8
-                            aPdu = new ResupplyCancelPdu();
-                            break;
-
-                        case REPAIR_COMPLETE: // 9
-                            aPdu = new RepairCompletePdu();
-                            break;
-
-                        case REPAIR_RESPONSE: // 10
-                            aPdu = new RepairResponsePdu();
-                            break;
-
-                        case CREATE_ENTITY: // 11
-                            aPdu = new CreateEntityPdu();
-                            break;
-
-                        case REMOVE_ENTITY: // 12
-                            aPdu = new RemoveEntityPdu();
-                            break;
-
-                        case START_RESUME: // 13
-                            aPdu = new StartResumePdu();
-                            break;
-
-                        case STOP_FREEZE: // 14
-                            aPdu = new StopFreezePdu();
-                            break;
-
-                        case ACKNOWLEDGE: // 15
-                            aPdu = new AcknowledgePdu();
-                            break;
-
-                        case ACTION_REQUEST: // 16
-                            aPdu = new ActionRequestPdu();
-                            break;
-
-                        case ACTION_RESPONSE: // 17
-                            aPdu = new ActionResponsePdu();
-                            break;
-
-                        case DATA_QUERY: // 18
-                            aPdu = new DataQueryPdu();
-                            break;
-
-                        case SET_DATA: // 19
-                            aPdu = new SetDataPdu();
-                            break;
-
-                        case DATA: // 20
-                            aPdu = new DataPdu();
-                            break;
-
-                        case EVENT_REPORT: // 21
-                            aPdu = new EventReportPdu();
-                            break;
-
-                        case ELECTROMAGNETIC_EMISSION: // 23
-                            aPdu = new ElectromagneticEmissionPdu();
-                            break;
-
-                        case DESIGNATOR: // 24
-                            aPdu = new DesignatorPdu();
-                            break;
-
-                        case TRANSMITTER: // 25
-                            aPdu = new TransmitterPdu();
-                            break;
-
-                        case SIGNAL: // 26
-                            aPdu = new SignalPdu();
-                            break;
-
-                        case RECEIVER: // 27
-                            aPdu = new ReceiverPdu();
-                            break;
-
-                        case IDENTIFICATION_FRIEND_OR_FOE: // 28
-                            aPdu = new IdentificationFriendOrFoePdu();
-                            break;
-
-                        case UNDERWATER_ACOUSTIC: // 29
-                            aPdu = new UnderwaterAcousticPdu();
-                            break;
-
-                        case SUPPLEMENTAL_EMISSION_ENTITY_STATE: // 30
-                            aPdu = new SupplementalEmissionEntityStatePdu();
-                            break;
-
-                        case INTERCOM_SIGNAL: // 31
-                            aPdu = new IntercomSignalPdu();
-                            break;
-
-                        case INTERCOM_CONTROL: // 32
-                            aPdu = new IntercomControlPdu();
-                            break;
-
-                        case AGGREGATE_STATE: // 33
-                            aPdu = new AggregateStatePdu();
-                            break;
-
-                        case ISGROUPOF: // 34
-                            aPdu = new IsGroupOfPdu();
-                            break;
-
-                        case TRANSFER_OWNERSHIP: // 35
-                            aPdu = new TransferOwnershipPdu();
-                            break;
-
-                        case ISPARTOF: // 36
-                            aPdu = new IsPartOfPdu();
-                            break;
-
-                        case MINEFIELD_STATE: // 37
-                            aPdu = new MinefieldStatePdu();
-                            break;
-
-                        case MINEFIELD_QUERY: // 38
-                            aPdu = new MinefieldQueryPdu();
-                            break;
-
-                        case MINEFIELD_DATA: // 39
-                            aPdu = new MinefieldDataPdu();
-                            break;
-
-                        case MINEFIELD_RESPONSE_NACK: // 40
-                            aPdu = new MinefieldResponseNACKPdu();
-                            break;
-
-                        case ENVIRONMENTAL_PROCESS: // 41
-                            aPdu = new EnvironmentalProcessPdu();
-                            break;
-
-                        case GRIDDED_DATA: // 42
-                            aPdu = new GriddedDataPdu();
-                            break;
-
-                        case POINT_OBJECT_STATE: // 43
-                            aPdu = new PointObjectStatePdu();
-                            break;
-
-                        case LINEAR_OBJECT_STATE: // 44
-                            aPdu = new LinearObjectStatePdu();
-                            break;
-
-                        case AREAL_OBJECT_STATE: // 45
-                            aPdu = new ArealObjectStatePdu();
-                            break;
-
-                        case TIME_SPACE_POSITION_INFORMATION: // 46
-                            aPdu = new TimeSpacePositionInformationPdu();
-                            break;
-
-                        case APPEARANCE: // 47
-                            aPdu = new AppearancePdu();
-                            break;
-
-                        case ARTICULATED_PARTS: // 48
-                            aPdu = new ArticulatedPartsPdu();
-                            break;
-
-                        case LIVE_ENTITY_FIRE: // 49
-                            aPdu = new LiveEntityFirePdu();
-                            break;
-
-                        case LIVE_ENTITY_DETONATION: // 50
-                            aPdu = new LiveEntityDetonationPdu();
-                            break;
-
-                        case CREATE_ENTITY_RELIABLE: // 51
-                            aPdu = new CreateEntityReliablePdu();
-                            break;
-
-                        case REMOVE_ENTITY_RELIABLE: // 52
-                            aPdu = new RemoveEntityReliablePdu();
-                            break;
-
-                        case START_RESUME_RELIABLE: // 53
-                            aPdu = new StartResumeReliablePdu();
-                            break;
-
-                        case STOP_FREEZE_RELIABLE: // 54
-                            aPdu = new StopFreezeReliablePdu();
-                            break;
-
-                        case ACKNOWLEDGE_RELIABLE: // 55
-                            aPdu = new AcknowledgeReliablePdu();
-                            break;
-
-                        case ACTION_REQUEST_RELIABLE: // 56
-                            aPdu = new ActionRequestReliablePdu();
-                            break;
-
-                        case ACTION_RESPONSE_RELIABLE: // 57
-                            aPdu = new ActionResponseReliablePdu();
-                            break;
-
-                        case DATA_QUERY_RELIABLE: // 58
-                            aPdu = new DataQueryReliablePdu();
-                            break;
-
-                        case SET_DATA_RELIABLE: // 59
-                            aPdu = new SetDataReliablePdu();
-                            break;
-
-                        case DATA_RELIABLE: // 60
-                            aPdu = new DataReliablePdu();
-                            break;
-
-                        case EVENT_REPORT_RELIABLE: // 61
-                            aPdu = new EventReportReliablePdu();
-                            break;
-
-                        case COMMENT_RELIABLE: // 62
-                            aPdu = new CommentReliablePdu();
-                            break;
-
-                        case RECORD_RELIABLE: // 63
-                            aPdu = new RecordReliablePdu();
-                            break;
-
-                        case SET_RECORD_RELIABLE: // 64
-                            aPdu = new SetRecordReliablePdu();
-                            break;
-
-                        case RECORD_QUERY_RELIABLE: // 65
-                            aPdu = new RecordQueryReliablePdu();
-                            break;
-
-                        case COLLISION_ELASTIC: // 66
-                            aPdu = new CollisionElasticPdu();
-                            break;
-
-                        case ENTITY_STATE_UPDATE: // 67
-                            aPdu = new EntityStateUpdatePdu();
-                            break;
-
-                        case DIRECTED_ENERGY_FIRE: // 68
-                            aPdu = new DirectedEnergyFirePdu();
-                            break;
-
-                        case ENTITY_DAMAGE_STATUS: // 69
-                            aPdu = new EntityDamageStatusPdu();
-                            break;
-
-                        case INFORMATION_OPERATIONS_ACTION: // 70
-                            aPdu = new InformationOperationsActionPdu();
-                            break;
-
-                        case INFORMATION_OPERATIONS_REPORT: // 71
-                            aPdu = new InformationOperationsReportPdu();
-                            break;
-
-                        case ATTRIBUTE: // 72
-                            aPdu = new AttributePdu();
-                            break;
-
-                        case COMMENT:
-                            aPdu = new CommentPdu();
-                            CommentPdu    newCommentPdu = (CommentPdu)aPdu;
-                            VariableDatum newVariableDatum = new VariableDatum();
-                            // etc. see Garrett and Pete's code
-                            break;
-
-                        default:
-                            System.out.println("*** Warning: PDU " + pdu.getValue() + " " + pdu + " not supported, created or sent ");
-
-                            // code generation block for this class follows:
-//                            System.out.println("                    case " + pdu + ": // " + pdu.getValue());
-//                            System.out.println("                        aPdu = new " + pdu.getDescription().replace(" ","").replace("-","").replace("/","") + 
-//                                                                                      "Pdu();");
-//                            System.out.println("                        break;");
-//                            System.out.println();
-                    }
-                    if (aPdu != null)
-                    {
-                        generatedPdusList.add(aPdu);
-                    }   
-                }
-                catch (Exception e)
-                {
-                    System.out.print("Exception thrown for PDU " + pdu.getValue() + " " + pdu);
-                    System.out.print(Arrays.toString(e.getStackTrace()));
-                    // continue looping
-                }
-            }
-            // Send the PDUs we created
-            System.out.println("Send the " + generatedPdusList.size() + " PDUs we created...");
-
-            InetAddress localMulticastAddress = InetAddress.getByName(DEFAULT_MULTICAST_ADDRESS);
-            MulticastSocket socket = new MulticastSocket(DEFAULT_MULTICAST_PORT);
-            socket.joinGroup(localMulticastAddress);
-
-            for (int idx = 0; idx < generatedPdusList.size(); idx++)
-			{
-                ByteArrayOutputStream baos = new ByteArrayOutputStream();
-                DataOutputStream dos = new DataOutputStream(baos);
-                byte[] buffer;
-
-                Pdu aPdu = generatedPdusList.get(idx);
-                aPdu.marshal(dos);
-
-                buffer = baos.toByteArray();
-                DatagramPacket packet = new DatagramPacket(buffer, buffer.length, localMulticastAddress, DEFAULT_MULTICAST_PORT);
-                socket.send(packet);
-                try {
-                    Thread.sleep(100L);
-                } catch (InterruptedException ex) {
-                }
-                String currentPduTypeValuePadded = String.format("%2s", aPdu.getPduType().getValue());
-                String currentPduTypePadded = String.format("%-34s", aPdu.getPduType()); // - indicates right padding of whitespace
-                System.out.print  ("Sent DIS PDU " + currentPduTypeValuePadded + " " + currentPduTypePadded );
-                System.out.println(" of type " + aPdu.getClass().getName());
-            }
-            // write the PDUs out to an XML file.
-            //PduContainer container = new PduContainer();
-            //container.setPdus(generatedPdus);
-            //container.marshallToXml("examplePdus.xml");
-        }
-        catch (IOException e)
-		{
-            System.out.println(e);
-        }
-    }
-
-    public static void main(String args[])
-	{
-        if (args.length == 2)
-        {
-            AllPduSender sender = new AllPduSender(Integer.parseInt(args[0]), args[1]);
-            sender.run();
-        } 
-        else
-        {
-            System.out.println("Usage:   AllPduSender <port> <multicast group>");
-            System.out.println("Default: AllPduSender  " + DEFAULT_MULTICAST_PORT + "   " + DEFAULT_MULTICAST_ADDRESS);
-            AllPduSender sender = new  AllPduSender(DEFAULT_MULTICAST_PORT, DEFAULT_MULTICAST_ADDRESS);
-            sender.run();
-        }
-        System.out.println("DisExamplesOpenDis7.AllPduSender complete.");
-    }
-}
diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/AllPduSenderLog.txt b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/AllPduSenderLog.txt
deleted file mode 100644
index ecca4d4a42dc1f491cacf7eb8a56bf2a152f5be1..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/AllPduSenderLog.txt
+++ /dev/null
@@ -1,87 +0,0 @@
-Invocation instructions:
-1. run or debug AllPduSender.java
-
-Program response:
-
-===================================================
-
-Usage:   AllPduSender <port> <multicast group>
-Default: AllPduSender  3000   239.1.2.3
-DisExamplesOpenDis7.AllPduSender started...
-Generate PDUs and note issues, if any...
-*** Note: DISPDUType.OTHER not supported
-Send the 72 PDUs we created...
-Sent DIS PDU  1 ENTITY_STATE                       of type edu.nps.moves.dis7.EntityStatePdu
-Sent DIS PDU  2 FIRE                               of type edu.nps.moves.dis7.FirePdu
-Sent DIS PDU  3 DETONATION                         of type edu.nps.moves.dis7.DetonationPdu
-Sent DIS PDU  4 COLLISION                          of type edu.nps.moves.dis7.CollisionPdu
-Sent DIS PDU  5 SERVICE_REQUEST                    of type edu.nps.moves.dis7.ServiceRequestPdu
-Sent DIS PDU  6 RESUPPLY_OFFER                     of type edu.nps.moves.dis7.ResupplyOfferPdu
-Sent DIS PDU  7 RESUPPLY_RECEIVED                  of type edu.nps.moves.dis7.ResupplyReceivedPdu
-Sent DIS PDU  8 RESUPPLY_CANCEL                    of type edu.nps.moves.dis7.ResupplyCancelPdu
-Sent DIS PDU  9 REPAIR_COMPLETE                    of type edu.nps.moves.dis7.RepairCompletePdu
-Sent DIS PDU 10 REPAIR_RESPONSE                    of type edu.nps.moves.dis7.RepairResponsePdu
-Sent DIS PDU 11 CREATE_ENTITY                      of type edu.nps.moves.dis7.CreateEntityPdu
-Sent DIS PDU 12 REMOVE_ENTITY                      of type edu.nps.moves.dis7.RemoveEntityPdu
-Sent DIS PDU 13 START_RESUME                       of type edu.nps.moves.dis7.StartResumePdu
-Sent DIS PDU 14 STOP_FREEZE                        of type edu.nps.moves.dis7.StopFreezePdu
-Sent DIS PDU 15 ACKNOWLEDGE                        of type edu.nps.moves.dis7.AcknowledgePdu
-Sent DIS PDU 16 ACTION_REQUEST                     of type edu.nps.moves.dis7.ActionRequestPdu
-Sent DIS PDU 17 ACTION_RESPONSE                    of type edu.nps.moves.dis7.ActionResponsePdu
-Sent DIS PDU 18 DATA_QUERY                         of type edu.nps.moves.dis7.DataQueryPdu
-Sent DIS PDU 19 SET_DATA                           of type edu.nps.moves.dis7.SetDataPdu
-Sent DIS PDU 20 DATA                               of type edu.nps.moves.dis7.DataPdu
-Sent DIS PDU 21 EVENT_REPORT                       of type edu.nps.moves.dis7.EventReportPdu
-Sent DIS PDU 22 COMMENT                            of type edu.nps.moves.dis7.CommentPdu
-Sent DIS PDU 23 ELECTROMAGNETIC_EMISSION           of type edu.nps.moves.dis7.ElectromagneticEmissionPdu
-Sent DIS PDU 24 DESIGNATOR                         of type edu.nps.moves.dis7.DesignatorPdu
-Sent DIS PDU 25 TRANSMITTER                        of type edu.nps.moves.dis7.TransmitterPdu
-Sent DIS PDU 26 SIGNAL                             of type edu.nps.moves.dis7.SignalPdu
-Sent DIS PDU 27 RECEIVER                           of type edu.nps.moves.dis7.ReceiverPdu
-Sent DIS PDU 28 IDENTIFICATION_FRIEND_OR_FOE       of type edu.nps.moves.dis7.IdentificationFriendOrFoePdu
-Sent DIS PDU 29 UNDERWATER_ACOUSTIC                of type edu.nps.moves.dis7.UnderwaterAcousticPdu
-Sent DIS PDU 30 SUPPLEMENTAL_EMISSION_ENTITY_STATE of type edu.nps.moves.dis7.SupplementalEmissionEntityStatePdu
-Sent DIS PDU 31 INTERCOM_SIGNAL                    of type edu.nps.moves.dis7.IntercomSignalPdu
-Sent DIS PDU 32 INTERCOM_CONTROL                   of type edu.nps.moves.dis7.IntercomControlPdu
-Sent DIS PDU 33 AGGREGATE_STATE                    of type edu.nps.moves.dis7.AggregateStatePdu
-Sent DIS PDU 34 ISGROUPOF                          of type edu.nps.moves.dis7.IsGroupOfPdu
-Sent DIS PDU 35 TRANSFER_OWNERSHIP                 of type edu.nps.moves.dis7.TransferOwnershipPdu
-Sent DIS PDU 36 ISPARTOF                           of type edu.nps.moves.dis7.IsPartOfPdu
-Sent DIS PDU 37 MINEFIELD_STATE                    of type edu.nps.moves.dis7.MinefieldStatePdu
-Sent DIS PDU 38 MINEFIELD_QUERY                    of type edu.nps.moves.dis7.MinefieldQueryPdu
-Sent DIS PDU 39 MINEFIELD_DATA                     of type edu.nps.moves.dis7.MinefieldDataPdu
-Sent DIS PDU 40 MINEFIELD_RESPONSE_NACK            of type edu.nps.moves.dis7.MinefieldResponseNACKPdu
-Sent DIS PDU 41 ENVIRONMENTAL_PROCESS              of type edu.nps.moves.dis7.EnvironmentalProcessPdu
-Sent DIS PDU 42 GRIDDED_DATA                       of type edu.nps.moves.dis7.GriddedDataPdu
-Sent DIS PDU 43 POINT_OBJECT_STATE                 of type edu.nps.moves.dis7.PointObjectStatePdu
-Sent DIS PDU 44 LINEAR_OBJECT_STATE                of type edu.nps.moves.dis7.LinearObjectStatePdu
-Sent DIS PDU 45 AREAL_OBJECT_STATE                 of type edu.nps.moves.dis7.ArealObjectStatePdu
-Sent DIS PDU 46 TIME_SPACE_POSITION_INFORMATION    of type edu.nps.moves.dis7.TimeSpacePositionInformationPdu
-Sent DIS PDU 47 APPEARANCE                         of type edu.nps.moves.dis7.AppearancePdu
-Sent DIS PDU 48 ARTICULATED_PARTS                  of type edu.nps.moves.dis7.ArticulatedPartsPdu
-Sent DIS PDU 49 LIVE_ENTITY_FIRE                   of type edu.nps.moves.dis7.LiveEntityFirePdu
-Sent DIS PDU 50 LIVE_ENTITY_DETONATION             of type edu.nps.moves.dis7.LiveEntityDetonationPdu
-Sent DIS PDU 51 CREATE_ENTITY_RELIABLE             of type edu.nps.moves.dis7.CreateEntityReliablePdu
-Sent DIS PDU 52 REMOVE_ENTITY_RELIABLE             of type edu.nps.moves.dis7.RemoveEntityReliablePdu
-Sent DIS PDU 53 START_RESUME_RELIABLE              of type edu.nps.moves.dis7.StartResumeReliablePdu
-Sent DIS PDU 54 STOP_FREEZE_RELIABLE               of type edu.nps.moves.dis7.StopFreezeReliablePdu
-Sent DIS PDU 55 ACKNOWLEDGE_RELIABLE               of type edu.nps.moves.dis7.AcknowledgeReliablePdu
-Sent DIS PDU 56 ACTION_REQUEST_RELIABLE            of type edu.nps.moves.dis7.ActionRequestReliablePdu
-Sent DIS PDU 57 ACTION_RESPONSE_RELIABLE           of type edu.nps.moves.dis7.ActionResponseReliablePdu
-Sent DIS PDU 58 DATA_QUERY_RELIABLE                of type edu.nps.moves.dis7.DataQueryReliablePdu
-Sent DIS PDU 59 SET_DATA_RELIABLE                  of type edu.nps.moves.dis7.SetDataReliablePdu
-Sent DIS PDU 60 DATA_RELIABLE                      of type edu.nps.moves.dis7.DataReliablePdu
-Sent DIS PDU 61 EVENT_REPORT_RELIABLE              of type edu.nps.moves.dis7.EventReportReliablePdu
-Sent DIS PDU 62 COMMENT_RELIABLE                   of type edu.nps.moves.dis7.CommentReliablePdu
-Sent DIS PDU 63 RECORD_RELIABLE                    of type edu.nps.moves.dis7.RecordReliablePdu
-Sent DIS PDU 64 SET_RECORD_RELIABLE                of type edu.nps.moves.dis7.SetRecordReliablePdu
-Sent DIS PDU 65 RECORD_QUERY_RELIABLE              of type edu.nps.moves.dis7.RecordQueryReliablePdu
-Sent DIS PDU 66 COLLISION_ELASTIC                  of type edu.nps.moves.dis7.CollisionElasticPdu
-Sent DIS PDU 67 ENTITY_STATE_UPDATE                of type edu.nps.moves.dis7.EntityStateUpdatePdu
-Sent DIS PDU 68 DIRECTED_ENERGY_FIRE               of type edu.nps.moves.dis7.DirectedEnergyFirePdu
-Sent DIS PDU 69 ENTITY_DAMAGE_STATUS               of type edu.nps.moves.dis7.EntityDamageStatusPdu
-Sent DIS PDU 70 INFORMATION_OPERATIONS_ACTION      of type edu.nps.moves.dis7.InformationOperationsActionPdu
-Sent DIS PDU 71 INFORMATION_OPERATIONS_REPORT      of type edu.nps.moves.dis7.InformationOperationsReportPdu
-Sent DIS PDU 72 ATTRIBUTE                          of type edu.nps.moves.dis7.AttributePdu
-DisExamplesOpenDis7.AllPduSender complete.
-BUILD SUCCESSFUL (total time: 8 seconds)
diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/EspduReceiver.java b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/EspduReceiver.java
deleted file mode 100755
index 286587d6f479032da084285ec3267f96ce18aac5..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/EspduReceiver.java
+++ /dev/null
@@ -1,93 +0,0 @@
-package MV3500Cohort2019JulySeptember.homework4.Yurkovich; 
-
-import java.io.*;
-import java.net.*;
-import java.util.*;
-
-import edu.nps.moves.dis7.*;
-import edu.nps.moves.dis7.util.*;
-
-/**
- * Receives PDUs from the network in IEEE DIS format.
- * Adapted from OpenDIS library example package edu.nps.moves.examples
- *
- * @author DMcG
- * @version $Id:$
- */
-public class EspduReceiver
-{
-    /** Max size of a PDU in binary format that we can receive. This is actually
-     * somewhat outdated--PDUs can be larger--but this is a reasonable starting point.
-     */
-    public static final int MAX_PDU_SIZE = 8192;
-
-    /** Default multicast group address we send on. */
-    public static final String DEFAULT_MULTICAST_ADDRESS = EspduSender.DEFAULT_MULTICAST_ADDRESS;
-	
-    /** Default multicast port used, matches Wireshark DIS capture default */
-    public static final int    DEFAULT_MULTICAST_PORT    = EspduSender.DEFAULT_MULTICAST_PORT;
-
-    public static void main(String args[])
-	{
-		System.out.println("DisExamplesOpenDis7.EspduReceiver started...");
-		
-        MulticastSocket socket;
-        DatagramPacket packet;
-        InetAddress address;
-        PduFactory pduFactory = new PduFactory();
-
-        try {
-            // Specify the socket to receive data
-            socket = new MulticastSocket(DEFAULT_MULTICAST_PORT);
-//          socket.setBroadcast(true);
-       
-            address = InetAddress.getByName(DEFAULT_MULTICAST_ADDRESS);
-            socket.joinGroup(address);
-
-            while (true) // Loop infinitely, receiving datagrams
-			{
-                byte buffer[] = new byte[MAX_PDU_SIZE];
-                packet = new DatagramPacket(buffer, buffer.length);
-
-                socket.receive(packet);
-
-                List<Pdu> pduBundle = pduFactory.getPdusFromBundle(packet.getData(),packet.getLength());
-                if (pduBundle.size() > 1)
-                    System.out.println("Bundle size is " + pduBundle.size());
-                Iterator iterator = pduBundle.iterator();
-
-                while (iterator.hasNext())
-                {
-                    Pdu aPdu = (Pdu)iterator.next();
-                    String receiptMessage = "received PDU type " + aPdu.getPduType().getValue() + "=" + aPdu.getPduType().name() + " " + aPdu.getClass().getName();
-                    if (aPdu instanceof EntityStatePdu)
-                    {
-                        System.out.println("===============");
-                        System.out.println(receiptMessage);
-                        EntityID      entityID = ((EntityStatePdu)aPdu).getEntityID();
-                        Vector3Double position = ((EntityStatePdu)aPdu).getEntityLocation();
-                        System.out.println("  entityID triplet: [" + entityID.getSiteID()+ ", " + entityID.getApplicationID()+ ", " + entityID.getEntityID()+ "] ");
-                        System.out.println("  Location in DIS coordinates: [" + position.getX() + ", " + position.getY() + ", " + position.getZ() + "]");
-                    }
-                    else if (aPdu instanceof FirePdu)
-                    {    
-                        System.out.println(receiptMessage);
-                        Vector3Double position = ((FirePdu)aPdu).getLocationInWorldCoordinates();
-                        System.out.println("  FirePdu locationInWorldCoordinates: [" + position.getX() + ", " + position.getY() + ", " + position.getZ() + "]");
-                        
-                    }
-                    else
-                    {    
-                        System.out.println(receiptMessage);
-                    }
-                } // end iterator loop through PDU bundle
-            } // end while
-        } // end try block
-        catch (IOException e)
-		{
-            System.out.println("Problem with DisExamplesOpenDis7.EspduReceiver, see exception trace:");
-            System.out.println(e);
-        }
-		System.out.println("DisExamplesOpenDis7.EspduReceiver complete.");
-    } // end main
-} // end class
diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/EspduSender.java b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/EspduSender.java
deleted file mode 100644
index d181d66badccccd0c8ad1f2cdba78922e7c47715..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/EspduSender.java
+++ /dev/null
@@ -1,347 +0,0 @@
-package MV3500Cohort2019JulySeptember.homework4.Yurkovich;
-
-import java.io.*;
-import java.net.*;
-import java.util.*;
-
-import edu.nps.moves.dis7.*;
-import edu.nps.moves.dis7.util.*;
-import edu.nps.moves.dis7.enumerations.Country;
-import edu.nps.moves.dis7.enumerations.EntityKind;
-import edu.nps.moves.dis7.enumerations.PlatformDomain;
-
-/**
- * Creates and sends ESPDUs in IEEE binary format. Adapted from OpenDIS library
- * example package edu.nps.moves.examples
- *
- * @author Don McGregor
- * @author Don Brutzman
- */
-public class EspduSender
-{
-	public static final int NUMBER_TO_SEND = 5; // 5000
-
-	/**
-	 * Default multicast group address we send on.
-	 */
-	public static final String DEFAULT_MULTICAST_ADDRESS = "239.1.2.3";
-
-	/**
-	 * Default multicast port used, matches Wireshark DIS capture default
-	 */
-	public static final int DEFAULT_MULTICAST_PORT = 3000;
-
-	public enum NetworkMode {
-		UNICAST, MULTICAST, BROADCAST
-	};
-
-	/**
-	 * Possible system properties, passed in via -Dattr=val networkMode:
-	 * unicast, broadcast, multicast destinationIp: where to send the packet. If
-	 * in multicast mode, this can be multicast. To determine broadcast
-	 * destination IP, use an online broadcast address calculator, for example
-	 * http://www.remotemonitoringsystems.ca/broadcast.php If in multicast mode,
-	 * a join() will be done on the multicast address. port: port used for both
-	 * source and destination.
-	 *
-	 * @param args
-	 */
-	public static void main(String args[])
-	{
-		System.out.println("DisExamplesOpenDis7.EspduSender started...");
-
-		// Default settings. These are used if no system properties are set. 
-		// If system properties are passed in, these are overridden later.
-		NetworkMode networkMode = NetworkMode.BROADCAST;
-		InetAddress     address = null; // must be initialized, even if null
-		int                port = DEFAULT_MULTICAST_PORT;
-        MulticastSocket  socket = null; // must be initialized to avoid later error, even if null;
-		EntityStatePdu    espdu = new EntityStatePdu();
-        DisTime         disTime = new DisTime();
-
-		// ICBM coordinates for my office
-		double latitude = 36.595517;
-		double longitude = -121.877000;
-		try
-        {
-			address = InetAddress.getByName(DEFAULT_MULTICAST_ADDRESS);
-		}
-        catch (UnknownHostException e)
-        {
-			System.out.println(e + " Cannot create multicast address");
-			System.exit(0);
-		}
-
-		// All system properties, passed in on the command line via -Dattribute=value
-		Properties systemProperties = System.getProperties();
-
-		// IP address we send to
-		String destinationIpString = systemProperties.getProperty("destinationIp");
-
-		// Port we send to, and local port we open the socket on
-		String portString = systemProperties.getProperty("port");
-
-		// Network mode: unicast, multicast, broadcast
-		String networkModeString = systemProperties.getProperty("networkMode"); // unicast or multicast or broadcast
-
-		// Set up socket to send information
-		try
-        {
-			if (portString != null) // Update port we send to, if provided
-			{
-				port = Integer.parseInt(portString);
-			}
-			socket = new MulticastSocket(port);
-
-			// Where we send packets to, the destination IP address
-			if (destinationIpString != null) 
-			{
-				address = InetAddress.getByName(destinationIpString);
-			}
-
-			// Type of transport: unicast, broadcast, or multicast
-			if (networkModeString != null)
-            {
-				if (networkModeString.equalsIgnoreCase("unicast")) 
-				{
-					networkMode = NetworkMode.UNICAST;
-				} 
-				else if (networkModeString.equalsIgnoreCase("broadcast"))
-                {
-					networkMode = NetworkMode.BROADCAST;
-				} 
-				else if (networkModeString.equalsIgnoreCase("multicast"))
-                {
-					networkMode = NetworkMode.MULTICAST;
-					if (!address.isMulticastAddress())
-					{
-						throw new RuntimeException("*** Error: sending to multicast address, but destination address " + address.toString() + "is not multicast");
-					}
-					socket.joinGroup(address);
-				}
-			} // end networkModeString
-		}
-		catch (IOException | RuntimeException e)
-		{
-			System.out.println("Unable to initialize network correctly, exiting.");
-			System.out.println(e);
-			System.exit(-1); // outta here
-		}
-
-		// Initialize values in the Entity State PDU object. The exercise ID is 
-		// a way to differentiate between different virtual worlds on one network.
-		// Note that some values (such as the PDU type and PDU family) are set
-		// automatically when you create the ESPDU.
-		espdu.setExerciseID((byte)1); //(short) 1);
-
-		// The EID is the unique identifier for objects in the world. This 
-		// EID should match up with the ID for the object specified in the 
-		// VMRL/x3d/virtual world.
-    
-  		EntityID entityID = espdu.getEntityID(); // initialize, reset, override
-        // TODO check: 0 is apparently not a valid site number, per DIS specification
-		entityID.setSiteID       ((short)1); // TODO utility method to allow int values
-		entityID.setApplicationID((short)2);
-		entityID.setEntityID     ((short)3);
-        espdu.setEntityID(entityID);
-
-		// Set the entity type. SISO has a big list of enumerations, so that by
-		// specifying various numbers we can say this is an M1A2 American tank,
-		// the USS Enterprise, and so on. We'll make this a tank. There is a 
-		// separate project elsehwhere in this project that implements DIS 
-		// enumerations in C++ and Java, but to keep things simple we just use
-		// numbers here.
-    
-        // New way using entity jar(s)
-        espdu.setEntityType(new edu.nps.moves.dis7.entities.usa.platform.land.M1A2());
-    
-    // Manual way:
-    /*
-		EntityType entityType = espdu.getEntityType();
-		entityType.setEntityKind(EntityKind.PLATFORM); //(short) 1);      // Platform (vs lifeform, munition, sensor, etc.)
-		entityType.setCountry(Country.UNITED_STATES_OF_AMERICA_USA); //225);               // USA
-		entityType.setDomain(Domain.inst(PlatformDomain.LAND));          // Land (vs air, surface, subsurface, space)
-		entityType.setCategory((byte) 1);        // Tank
-		entityType.setSubCategory((byte) 1);     // M1 Abrams
-		entityType.setSpecific((byte) 3);        // M1A2 Abrams
-    */
-		Set<InetAddress> broadcastAddresses;
-
-		try // Loop through sending N ESPDUs
-		{
-			System.out.println("Sending " + NUMBER_TO_SEND + " sets of packets:"); // + address.toString()
-			
-			for (int index = 0; index < NUMBER_TO_SEND; index++) {
-				// DIS time is a pain in the uh, neck. DIS time units are 2^31-1 units per
-				// hour, and time is set to DIS time units from the top of the hour. 
-				// This means that if you start sending just before the top of the hour
-				// the time units can roll over to zero as you are sending. The receivers
-				// (escpecially homegrown ones) are often not able to detect rollover
-				// and may start discarding packets as dupes or out of order. We use
-				// an NPS timestamp here, hundredths of a second since the start of the
-				// year. The DIS standard for time is often ignored in the wild; I've seen
-				// people use Unix time (seconds since 1970) and more. Or you can
-				// just stuff idx into the timestamp field to get something that is monotonically
-				// increasing.
-
-				// Note that timestamp is used to detect duplicate and out of order packets. 
-				// That means if you DON'T change the timestamp, many implementations will simply
-				// discard subsequent packets that have an identical timestamp. Also, if they
-				// receive a PDU with an timestamp lower than the last one they received, they
-				// may discard it as an earlier, out-of-order PDU. So it is a good idea to
-				// update the timestamp on ALL packets sent.
-				// An alterative approach: actually follow the standard. It's a crazy concept,
-				// but it might just work.
-				int timestamp = disTime.getDisAbsoluteTimestamp();
-				espdu.setTimestamp(timestamp);
-
-				// Set the position of the entity in the world. DIS uses a cartesian 
-				// coordinate system with the origin at the center of the earth, the x
-				// axis out at the equator and prime meridian, y out at the equator and
-				// 90 deg east, and z up and out the north pole. To place an object on
-				// the earth's surface you also need a model for the shape of the earth
-				// (it's not a sphere.) All the fancy math necessary to do this is in
-				// the SEDRIS SRM package. There are also some one-off formulas for 
-				// doing conversions from, for example, lat/lon/altitude to DIS coordinates.
-				// Here we use those one-off formulas.
-				// Modify the position of the object. This will send the object a little
-				// due east by adding some to the longitude every iteration. Since we
-				// are on the Pacific coast, this sends the object east. Assume we are
-				// at zero altitude. In other worlds you'd use DTED to determine the
-				// local ground altitude at that lat/lon, or you'd just use ground clamping.
-				// The x and y values will change, but the z value should not.
-				//lon = lon + (double)((double)idx / 100000.0);
-				//System.out.println("lla=" + lat + "," + lon + ", 0.0");
-				double direction = Math.pow((double) (-1.0), (double) (index));
-				longitude = longitude + (direction * 0.00006);
-
-				double disCoordinates[] = CoordinateConversions.getXYZfromLatLonDegrees(latitude, longitude, 1.0);
-				Vector3Double location = espdu.getEntityLocation();
-				location.setX(disCoordinates[0]);
-				location.setY(disCoordinates[1]);
-				location.setZ(disCoordinates[2]);
-				System.out.println("===============");
-				System.out.println("Create new PDUs");
-				System.out.println("  latitude, longitude:   [" + latitude + ", " + longitude + "]");
-				System.out.println("  coordinate conversion: [" + disCoordinates[0] + ", " + disCoordinates[1] + ", " + disCoordinates[2] + "]");
-
-				location = espdu.getEntityLocation();
-
-				System.out.println("Espdu #" + index + " entityID=[" + entityID.getSiteID()+ "," + entityID.getApplicationID()+ "," + entityID.getEntityID()+ "]");
-				double c[]   = {location.getX(), location.getY(), location.getZ()};
-				double lla[] = CoordinateConversions.xyzToLatLonDegrees(c);
-//              System.out.println("  DIS entityLocation: [" + location.getX() + "," + location.getY() + "," + location.getZ() + "]");
-				String debugString = " Location (latitude/longitude/altitude): [" + lla[0] + ", " + lla[1] + ", " + lla[2] + "]";
-//      		System.out.println(debugString);
-
-				// Optionally, we can do some rotation of the entity
-				/*
-            Orientation orientation = espdu.getEntityOrientation();
-            float psi = orientation.getPsi();
-            psi = psi + idx;
-            orientation.setPsi(psi);
-            orientation.setTheta((float)(orientation.getTheta() + idx /2.0));
-				 */
-				// You can set other ESPDU values here, such as the velocity, acceleration,
-				// and so on.
-				// Marshal out the espdu object to a byte array, then send a datagram
-				// packet with that data in it.
-				ByteArrayOutputStream baos = new ByteArrayOutputStream();
-				DataOutputStream dos = new DataOutputStream(baos);
-                DatagramPacket packet;
-
-				// The byte array here is the packet in DIS format. We put that into a 
-				// datagram and send it.
-				espdu.marshal(dos);
-				byte[] espduArray = baos.toByteArray();
-
-				FirePdu firePdu = new FirePdu();
-                firePdu.setLocationInWorldCoordinates(espdu.getEntityLocation());
-				byte[] fireArray = firePdu.marshal();
-
-				broadcastAddresses = getBroadcastAddresses();
-				Iterator iterator = broadcastAddresses.iterator();
-				while (iterator.hasNext())
-				{
-					InetAddress broadcast = (InetAddress) iterator.next();
-                    if (espduArray.length > 0)
-                    {
-                        System.out.println("Sending espdu datagram packet to " + broadcast);
-                        packet = new DatagramPacket(espduArray, espduArray.length, broadcast, port);
-                        socket.send(packet);
-                    }
-					// TODO experiment with these!  8)
-                    if (fireArray.length > 0)
-                    {
-                        System.out.println("Sending  fire datagram packet to " + broadcast);
-                        packet = new DatagramPacket(fireArray, fireArray.length, broadcast, port); // alternate
-                        socket.send(packet);
-                    }
-				}
-
-				// Send every 1 second within loop. Otherwise all this will be all over in a fraction of a second.
-				Thread.sleep(1000); // msec
-			}
-		}
-		catch (Exception e)
-		{
-            System.out.println("Problem with DisExamplesOpenDis7.EspduSender, see exception trace:");
-			System.out.println(e);
-		}
-        System.out.println("===============");
-		System.out.println("DisExamplesOpenDis7.EspduSender complete.");
-	}
-
-	/**
-	 * A number of sites get all snippy about using 255.255.255.255 for a
-	 * broadcast address; it trips their security software and they kick you off
-	 * their network. (Comcast, NPS, etc.) This determines the broadcast address for
-	 * all connected interfaces, based on the IP and subnet mask. If you have a
-	 * dual-homed host it will return a broadcast address for both. If you have
-	 * some VMs running on your host this will pick up the addresses for those
-	 * as well--e.g. running VMWare on your laptop with a local IP this will also
-	 * pick up a 192.168 address assigned to the VM by the host OS.
-	 *
-	 * @return set of all broadcast addresses
-	 */
-	public static Set<InetAddress> getBroadcastAddresses()
-	{
-		Set<InetAddress> broadcastAddresses = new HashSet<>();
-		Enumeration interfaces;
-
-		try {
-			interfaces = NetworkInterface.getNetworkInterfaces();
-
-			while (interfaces.hasMoreElements())
-			{
-				NetworkInterface anInterface = (NetworkInterface) interfaces.nextElement();
-
-				if (anInterface.isUp())
-				{
-					Iterator iterator = anInterface.getInterfaceAddresses().iterator();
-					while (iterator.hasNext())
-					{
-						InterfaceAddress anAddress = (InterfaceAddress) iterator.next();
-						if ((anAddress == null || anAddress.getAddress().isLinkLocalAddress()))
-						{
-							continue;
-						}
-
-						//System.out.println("Getting broadcast address for " + anAddress);
-						InetAddress broadcastAddress = anAddress.getBroadcast();
-						if (broadcastAddress != null)
-						{
-							broadcastAddresses.add(broadcastAddress);
-						}
-					}
-				}
-			}
-		}
-		catch (SocketException e) 
-		{
-            System.out.println("Problem with DisExamplesOpenDis7.EspduSender.getBroadcastAddresses(), see exception trace:");
-			System.out.println(e);
-		}
-		return broadcastAddresses;
-	}
-}
diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/EspduTerminalLog.txt b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/EspduTerminalLog.txt
deleted file mode 100644
index 4dba55c8530bae5461a83ec84f731824570291d1..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/EspduTerminalLog.txt
+++ /dev/null
@@ -1,136 +0,0 @@
-Invocation instructions:
-1. run/debug EspduReceiver.java (since sender does not block, first be ready to listen)
-2. run/debug EspduSender.java
-
-Program responses, sender and receiver:
-
-===================================================
-run:
-
-
-DisExamplesOpenDis7.EspduSender started...
-Sending 5 sets of packets:
-===============
-Create new PDUs
-  latitude, longitude:   [36.595517, -121.87693999999999]
-  coordinate conversion: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-Espdu #0 entityID=[1,2,3]
-Sending espdu datagram packet to /127.255.255.255
-Sending  fire datagram packet to /127.255.255.255
-Sending espdu datagram packet to /172.20.221.218
-Sending  fire datagram packet to /172.20.221.218
-Sending espdu datagram packet to /10.0.0.255
-Sending  fire datagram packet to /10.0.0.255
-===============
-Create new PDUs
-  latitude, longitude:   [36.595517, -121.877]
-  coordinate conversion: [-2707492.9269245286, -4353663.899966802, 3781450.3202754413]
-Espdu #1 entityID=[1,2,3]
-Sending espdu datagram packet to /127.255.255.255
-Sending  fire datagram packet to /127.255.255.255
-Sending espdu datagram packet to /172.20.221.218
-Sending  fire datagram packet to /172.20.221.218
-Sending espdu datagram packet to /10.0.0.255
-Sending  fire datagram packet to /10.0.0.255
-===============
-Create new PDUs
-  latitude, longitude:   [36.595517, -121.87693999999999]
-  coordinate conversion: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-Espdu #2 entityID=[1,2,3]
-Sending espdu datagram packet to /127.255.255.255
-Sending  fire datagram packet to /127.255.255.255
-Sending espdu datagram packet to /172.20.221.218
-Sending  fire datagram packet to /172.20.221.218
-Sending espdu datagram packet to /10.0.0.255
-Sending  fire datagram packet to /10.0.0.255
-===============
-Create new PDUs
-  latitude, longitude:   [36.595517, -121.877]
-  coordinate conversion: [-2707492.9269245286, -4353663.899966802, 3781450.3202754413]
-Espdu #3 entityID=[1,2,3]
-Sending espdu datagram packet to /127.255.255.255
-Sending  fire datagram packet to /127.255.255.255
-Sending espdu datagram packet to /172.20.221.218
-Sending  fire datagram packet to /172.20.221.218
-Sending espdu datagram packet to /10.0.0.255
-Sending  fire datagram packet to /10.0.0.255
-===============
-Create new PDUs
-  latitude, longitude:   [36.595517, -121.87693999999999]
-  coordinate conversion: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-Espdu #4 entityID=[1,2,3]
-Sending espdu datagram packet to /127.255.255.255
-Sending  fire datagram packet to /127.255.255.255
-Sending espdu datagram packet to /172.20.221.218
-Sending  fire datagram packet to /172.20.221.218
-Sending espdu datagram packet to /10.0.0.255
-Sending  fire datagram packet to /10.0.0.255
-===============
-DisExamplesOpenDis7.EspduSender complete.
-BUILD SUCCESSFUL (total time: 8 seconds)
-
-===================================================
-
-DisExamplesOpenDis7.EspduReceiver started...
-===============
-received PDU type 1=ENTITY_STATE edu.nps.moves.dis7.EntityStatePdu
-  entityID triplet: [1, 2, 3] 
-  Location in DIS coordinates: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-received PDU type 2=FIRE edu.nps.moves.dis7.FirePdu
-  FirePdu locationInWorldCoordinates: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-===============
-received PDU type 1=ENTITY_STATE edu.nps.moves.dis7.EntityStatePdu
-  entityID triplet: [1, 2, 3] 
-  Location in DIS coordinates: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-received PDU type 2=FIRE edu.nps.moves.dis7.FirePdu
-  FirePdu locationInWorldCoordinates: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-===============
-received PDU type 1=ENTITY_STATE edu.nps.moves.dis7.EntityStatePdu
-  entityID triplet: [1, 2, 3] 
-  Location in DIS coordinates: [-2707492.9269245286, -4353663.899966802, 3781450.3202754413]
-received PDU type 2=FIRE edu.nps.moves.dis7.FirePdu
-  FirePdu locationInWorldCoordinates: [-2707492.9269245286, -4353663.899966802, 3781450.3202754413]
-===============
-received PDU type 1=ENTITY_STATE edu.nps.moves.dis7.EntityStatePdu
-  entityID triplet: [1, 2, 3] 
-  Location in DIS coordinates: [-2707492.9269245286, -4353663.899966802, 3781450.3202754413]
-received PDU type 2=FIRE edu.nps.moves.dis7.FirePdu
-  FirePdu locationInWorldCoordinates: [-2707492.9269245286, -4353663.899966802, 3781450.3202754413]
-===============
-received PDU type 1=ENTITY_STATE edu.nps.moves.dis7.EntityStatePdu
-  entityID triplet: [1, 2, 3] 
-  Location in DIS coordinates: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-received PDU type 2=FIRE edu.nps.moves.dis7.FirePdu
-  FirePdu locationInWorldCoordinates: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-===============
-received PDU type 1=ENTITY_STATE edu.nps.moves.dis7.EntityStatePdu
-  entityID triplet: [1, 2, 3] 
-  Location in DIS coordinates: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-received PDU type 2=FIRE edu.nps.moves.dis7.FirePdu
-  FirePdu locationInWorldCoordinates: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-===============
-received PDU type 1=ENTITY_STATE edu.nps.moves.dis7.EntityStatePdu
-  entityID triplet: [1, 2, 3] 
-  Location in DIS coordinates: [-2707492.9269245286, -4353663.899966802, 3781450.3202754413]
-received PDU type 2=FIRE edu.nps.moves.dis7.FirePdu
-  FirePdu locationInWorldCoordinates: [-2707492.9269245286, -4353663.899966802, 3781450.3202754413]
-===============
-received PDU type 1=ENTITY_STATE edu.nps.moves.dis7.EntityStatePdu
-  entityID triplet: [1, 2, 3] 
-  Location in DIS coordinates: [-2707492.9269245286, -4353663.899966802, 3781450.3202754413]
-received PDU type 2=FIRE edu.nps.moves.dis7.FirePdu
-  FirePdu locationInWorldCoordinates: [-2707492.9269245286, -4353663.899966802, 3781450.3202754413]
-===============
-received PDU type 1=ENTITY_STATE edu.nps.moves.dis7.EntityStatePdu
-  entityID triplet: [1, 2, 3] 
-  Location in DIS coordinates: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-received PDU type 2=FIRE edu.nps.moves.dis7.FirePdu
-  FirePdu locationInWorldCoordinates: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-===============
-received PDU type 1=ENTITY_STATE edu.nps.moves.dis7.EntityStatePdu
-  entityID triplet: [1, 2, 3] 
-  Location in DIS coordinates: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-received PDU type 2=FIRE edu.nps.moves.dis7.FirePdu
-  FirePdu locationInWorldCoordinates: [-2707488.3677768684, -4353666.735244378, 3781450.3202754413]
-
-===================================================
\ No newline at end of file
diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/PduListenerSaver.java b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/PduListenerSaver.java
deleted file mode 100644
index 4fc9370b799f10ac9eeeccf09731b83928b7ba8b..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/PduListenerSaver.java
+++ /dev/null
@@ -1,82 +0,0 @@
-/**
- * Copyright (c) 2008-2019, MOVES Institute, Naval Postgraduate School. All rights reserved.
- * This work is licensed under the BSD open source license, available at https://www.movesinstitute.org/licenses/bsd.html
- */
-package MV3500Cohort2019JulySeptember.homework4.Yurkovich;
-
-import edu.nps.moves.dis7.util.playerrecorder.Recorder;
-import java.io.IOException;
-import java.util.Scanner;
-
-/**
- * PduSaver.java created on Aug 21, 2019
- * MOVES Institute Naval Postgraduate School, Monterey, CA, USA www.nps.edu
- *
- * @author Mike Bailey, jmbailey@nps.edu
- * @version $Id$
- */
-public class PduListenerSaver
-{
-  private final static String DEFAULT_OUTPUTDIR = "./pduLog";
-  private final static String MCAST_ADDR = "239.1.2.3";
-  private final static int DIS_PORT = 3000;
-
-  private enum mystate
-  {
-    RUNNING,
-    PAUSED;
-  }
-
-  public static void main(String[] args)
-  {
-    String outDir = DEFAULT_OUTPUTDIR;
-    String mcast = MCAST_ADDR;
-    int port = DIS_PORT;
-
-    switch (args.length) {
-      case 0:
-        break;
-      case 1:
-        outDir = args[0];
-        break;
-      case 3:
-        outDir = args[0];
-        mcast = args[1];
-        port = Integer.parseInt(args[2]);
-        break;
-      default:
-        System.err.println("Usage: PduListener() or PduListener(\"outputdir\") or PduListener(\"outputdir\",\"multicast address\", ipPort");
-        System.exit(1);
-    }
-
-    System.out.println("Beginning pdu save to directory " + outDir);
-    try {
-      Recorder recorder = new Recorder(outDir, mcast, port);
-
-      recorder.startResume();
-      mystate state = mystate.RUNNING;
-      Scanner scan = new Scanner(System.in);
-
-      while (true) {
-        System.out.println("Type p/enter to pause, r/enter to resume, q/enter to quit");
-        String line = scan.nextLine();
-        if (line.equalsIgnoreCase("p") && state == mystate.RUNNING) {
-          recorder.stopPause();
-          state = mystate.PAUSED;
-        }
-        else if (line.equalsIgnoreCase("r") && state == mystate.PAUSED) {
-          recorder.startResume();
-          state = mystate.RUNNING;
-        }
-        else if (line.equalsIgnoreCase("q")) {
-          recorder.end();
-          break;
-        }
-      }
-      System.out.println("Ending pdu save to "+recorder.getLogFile());
-    }
-    catch (IOException ex) {
-      System.err.println("Exception: " + ex.getClass().getSimpleName() + ": " + ex.getLocalizedMessage());
-    }
-  }
-}
diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/PduReaderPlayer.java b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/PduReaderPlayer.java
deleted file mode 100644
index 62f917bd55fb301ef7671fc1d3793c708c232eb4..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/PduReaderPlayer.java
+++ /dev/null
@@ -1,86 +0,0 @@
-/**
- * Copyright (c) 2008-2019, MOVES Institute, Naval Postgraduate School. All rights reserved.
- * This work is licensed under the BSD open source license, available at https://www.movesinstitute.org/licenses/bsd.html
- */
-package MV3500Cohort2019JulySeptember.homework4.Yurkovich;
-
-import edu.nps.moves.dis7.util.playerrecorder.Player;
-import java.io.File;
-import java.io.IOException;
-import java.util.Scanner;
-
-/**
- * PduSaver.java created on Aug 21, 2019
- * MOVES Institute Naval Postgraduate School, Monterey, CA, USA www.nps.edu
- *
- * @author Mike Bailey, jmbailey@nps.edu
- * @version $Id$
- */
-public class PduReaderPlayer
-{
-  private final static String DEFAULT_OUTPUTDIR = "pduLog";
-  private final static String MCAST_ADDR = "239.1.2.3";
-  private final static int DIS_PORT = 3000;
-
-  private enum mystate
-  {
-    RUNNING,
-    PAUSED;
-  }
-
-  public static void main(String[] args)
-  {
-    String outDir = DEFAULT_OUTPUTDIR;
-    String mcast = MCAST_ADDR;
-    int port = DIS_PORT;
-    
-    System.out.println("DisExamplesOpenDis7.PduReaderPlayer started...");
-
-    switch (args.length) {
-      case 0:
-        break;
-      case 1:
-        outDir = args[0];
-        break;
-      case 3:
-        outDir = args[0];
-        mcast = args[1];
-        port = Integer.parseInt(args[2]);
-        break;
-      default:
-        System.err.println("Usage: PduReaderPlayer() or PduReaderPlayer(\"outputdir\") or PduReaderPlayer(\"outputdir\",\"multicast address\", ipPort");
-        System.exit(1);
-    }
-
-    System.out.println("Beginning pdu playback from directory " + outDir);
-    try {
-      Player player = new Player(mcast, port, new File(outDir).toPath());
-      player.startResume();
-      mystate state = mystate.RUNNING;
-      Scanner scan = new Scanner(System.in);
-
-      while (true) {
-        System.out.println("Type p/enter to pause, r/enter to resume, q/enter to quit");
-        String line = scan.nextLine();
-        if (line.equalsIgnoreCase("p") && state == mystate.RUNNING) {
-          player.stopPause();
-          state = mystate.PAUSED;
-        }
-        else if (line.equalsIgnoreCase("r") && state == mystate.PAUSED) {
-          player.startResume();
-          state = mystate.RUNNING;
-        }
-        else if (line.equalsIgnoreCase("q")) {
-          player.end();
-          break;
-        }
-      }
-      System.out.println("Ending pdu files playback for directory " + outDir);
-      System.out.println("DisExamplesOpenDis7.PduReaderPlayer complete.");
-      System.exit(0); // not sure why this is necessary with Netbeans...
-    }
-    catch (IOException ex) {
-      System.err.println("Exception: " + ex.getClass().getSimpleName() + ": " + ex.getLocalizedMessage());
-    }
-  }
-}
diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/PduReaderPlayerLog.txt b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/PduReaderPlayerLog.txt
deleted file mode 100644
index 7c6a4361a8bd52edb1b201b3d1fa30f04e886f5a..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/PduReaderPlayerLog.txt
+++ /dev/null
@@ -1,24 +0,0 @@
-Invocation instructions:
-
-0. check for existence of recorded files in directory, e.g. examples/pduLog/Pdusave.dislog
-1. first running AllPduReceiver can confirm that DIS replay actually occurs.
-2. run or debug PduReaderPlayer.java
-3. Type p/enter to pause, r/enter to resume, q/enter to quit
-
-Program response:
-
-===================================================
-
-DisExamplesOpenDis7.PduReaderPlayer started...
-Beginning pdu playback from directory pduLog
-Replaying DIS logs.
-Replaying C:\x-nps-gitlab\NetworkedGraphicsMV3500\examples\pduLog\Pdusave.dislog
-Beginning of DIS capture file, Pdusave.dislog.  
-Type p/enter to pause, r/enter to resume, q/enter to quit
-72
-End of replay from Pdusave.dislog
-End of DIS capture file, Pdusave.dislog.
-q
-Ending pdu files playback for directory pduLog
-DisExamplesOpenDis7.PduReaderPlayer complete.
-BUILD SUCCESSFUL (total time: 20 seconds)
\ No newline at end of file
diff --git a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/README.md b/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/README.md
deleted file mode 100644
index 89d90724bc17cff98112589508dcace4ba72345a..0000000000000000000000000000000000000000
--- a/assignments/src/MV3500Cohort2019JulySeptember/homework4/Yurkovich/README.md
+++ /dev/null
@@ -1,7 +0,0 @@
-# DIS Protocol Examples using Open-DIS-Java Library v7
-
-TODO under development!
-
-Course examples using the [Open-DIS-Java](https://github.com/open-dis/open-dis-java) library are presented in this package.
-
-See [specifications](../../../specifications) directory to obtain reference copies of DIS and RPRFOM standards.