NASA Scientific and Technical Aerospace Reports

Traditional networking implementations follow a layered protocol model that implements a well-defined protocol stack.
Major functionality is built into the software and hardware of end-point hosts and the network switches and routers. The entire
complex of end-point host system software, network switch software, and networking services evolves slowly due to the need
to reach consensus prior to widespread changes and improvements in the protocols. Active Network was developed to bring
robust, rapid flexibility to developing and deploying new network services and protocols. Our research project covered three
areas: 1) Create an architecture and implementation for Innovative Active Networking Services based on Composite Protocols;
2) Established criteria and evaluation measures for Active Network performance; and 3) Implement Active Networking
services on end-point host systems based on the Windows NT and Linux operating systems.
DTIC
Computer Networks; Protocol (Computers)
20040073660 Naval Ocean Systems Center, San Diego, CA
Security Considerations for Autonomous Robots
Gage, Douglas W.; Apr. 1988; 6 pp.; In English
Report No.(s): AD-A422545; No Copyright; Avail: CASI; A02, Hardcopy
The security aspects of autonomous robots are analyzed by modeling a robot as a set of sensors, effectors, optional
communications resources, and processing elements whose behavior is tightly coupled to the sensed characteristics of its
environment. A simple taxonomy of potential generic threat types is presented, comprising both the possible direct external
threat paths and the derived consequent internal threat states. Several generic countermeasure strategies are proposed.
DTIC
Autonomy; Robots; Security
20040073669 Army Tank-Automotive Research and Development Command, Warren, MI
Lab Test of a Prototype HMMWV Air Filter Element Constructed With Microstructured Oriented Fiber (MOF) Filter
Media
Goryca, Mary; Richard, Michael; Feb. 2004; 19 pp.; In English; Original contains color illustrations
Contract(s)/Grant(s): DAAE07-03-C-L066
Report No.(s): AD-A422560; TARDEC-TR-13976; No Copyright; Avail: CASI; A03, Hardcopy
Two prototype Microstructured Oriented Fiber (MOF) air filter elements were designed and built to fit a HMMWV (M998
Utility Truck) multi-stage housing by MicroEnergy Technologies Inc. under contract DAAE07-03-C-L066. During April and
May of 2003, the MOF filters underwent dust capacity and efficiency performance testing at the U.S.Army Tank Automotive
Research, Development and Engineering Center (TARDEC). The MOF filter did not meet the efficiency or dust capacity
performance requirements. The MOF filter attained an efficiency of 66.78%, which is far lower than the required 99. 5%. The
MOF filter achieved a dust capacity of 40 minutes, which is considerably less than the required 20 hours. During the efficiency
and dust capacity testing, the pressure drop across the master (absolute) filter increased rapidly which indicated the MOF filter
was allowing a significant amount of dust to pass through resulting in low performance. The MOF filter is not recommended
for the M988 since the dust capacity and initial efficency did net meet the performance requirements.
DTIC
Air Filters; Prototypes
20040073686 Naval Postgraduate School, Monterey, CA
Analysis of Network Management Protocols in Optical Networks
Lim, Kok S.; Mar. 2004; 89 pp.; In English; Original contains color illustrations
Report No.(s): AD-A422585; No Copyright; Avail: CASI; A05, Hardcopy
In this thesis the scalability issues of Simple Network Management Protocol (SNMP) in optical network management are
explored. It is important to understand the effect of varying the number of nodes the request inter- arrival times and the polling
interval on the performance of SNMP and the number of nodes that can be effectively managed. The current study explored
the effect of varying these parameters in a controlled test environment using the OPNET simulation package. In addition,
traffic analysis was performed on measured SNMP traffic and statistics were developed from the traffic analysis. With this
understanding of SNMP traffic an SNMPv1 model was defined and integrated into an OPNET network model to study the
performance of SNMP.
DTIC
Network Analysis; Optical Properties; Protocol (Computers)
206