Certification compliance check for airborne software is very critical as it aids in the certification of the software. Since this compliance check is performed manually which is time-consuming and erroneous, an in-hou...
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ISBN:
(纸本)9781509063673
Certification compliance check for airborne software is very critical as it aids in the certification of the software. Since this compliance check is performed manually which is time-consuming and erroneous, an in-house developed Certification Compliance Tool (CCT) helps in checking the compliance as per RTCA DO- 178B/C and generate artifacts depicting the magnitude of compliance. In order to generate the magnitude of compliance for the artifacts with respect to the Civil Aerospace Certification standard, RTCA DO-178B/C, an effective parsing technique is required to be incorporated to parse the artifact/s and generate compliance metric for the artifact/s. In this paper we propose a novel approach used in the design and development of an effective and efficient parsing technique incorporated in the indigenous software tool CCT used for compliance check. The tool checks the ratio of compliance of the artifacts generated across various phases of Software Development Life Cycle (SDLC) process involved in the development of Safety- Critical software as per RTCA DO-178B/C. The indigenous tool accepts these artifacts as inputs and based on the software criticality level, it analyzes the compliance of these artifacts with the guidelines provided and recommended by RTCA DO-178B/C. The output of the tool provides the percentage of compliance of the artifacts that helps in accessing the Certification capabilities of the developed software. The percentage of compliance predicts the acceptance or rejection probabilities of the software being certified by the Certification Agency. The certification parser is developed using Python modules like Pywin32, Pypdf parsers and different approaches for Natural language processing using Python Natural Language Toolkit (NLTK). The in-house tool replaces the manual effort by an individual/s which may be erroneous and impact the time-schedule, which compromises the software safety. The integration of the tool with commercial tools will help
Negotiating a hairpin bend in a hilly track is not an easy task but demands a lot of skill, actually it is an art to come out successfully. The drivers have to be agile at all times. His sensory organs had to work ove...
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Negotiating a hairpin bend in a hilly track is not an easy task but demands a lot of skill, actually it is an art to come out successfully. The drivers have to be agile at all times. His sensory organs had to work overtime for a quick response. This paper brings out a technical solution by placing an interface between the man and the machine to lessen the burden on the drivers. In the proposed system sensors, communication and GPS converge to form a synergic solution to this peril. GPS technology takes care of the location of the vehicles with respect to the hairpin bend to decide the priority in which vehicles have to move. Information exchange between vehicles regarding speed, distance, direction and vehicle type is captured by the system and the decision based on algorithms is passed on to the vehicle by voice and visual display. Speed of the vehicle is automatically controlled using GPS information regarding the nature of curve. In case of a vehicle breakdown in the control zone, the information is sent to other vehicle for suitable action.
With the increase of vehicle usage over the world, fuel necessary has become a tremendous problem. Design and implementation of load cell based fuel measurement measures the accurate level of fuel adding while fuel fi...
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With the increase of vehicle usage over the world, fuel necessary has become a tremendous problem. Design and implementation of load cell based fuel measurement measures the accurate level of fuel adding while fuel filling process. There is a large variety of methods for measuring fuel level, ranging from those using mechanical floats and capacitive and optical sensors to ultrasound methods. Nowadays all fuel bunks having types of digital displays unit in order to display the value of fuel adding to the vehicle. But we don't know whether they adding accurate value or not. By fixing the load cell below the fuel tank, at any point of time it will continuously measures the level of fuel with the help of processor and displays the value in the display unit fixed on the dash board. Speedometer which is configured with the processor, this will continuously monitor the current speed of vehicle and the calculation of mileage which signify the residual kilometer of vehicle will pass through, depending upon my current speed. This helps the user can easily identifies the remaining kilometer to run and be aware of fuel usage by engine. At the same time this helps the owner or user came to know about what amount of fuel will adding suppose if drivers are able to cheat. Hence, the measured values are send to the owner mobile through GSM in order to avoid the unprincipled method and be aware of the fuel consumption through SMS services.
In India train is the preferred mode of transport most widely used by all class of people. The present system needs much advancement in railway communication system in the area of journey reservation, catering, safety...
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ISBN:
(纸本)9781479936984
In India train is the preferred mode of transport most widely used by all class of people. The present system needs much advancement in railway communication system in the area of journey reservation, catering, safety and rescue operations. It is pertinent to bring out here the present expectation of passenger should be of interactive mode and user friendly. This paper technically brings out a visible solution for modernising the railway system. By listing the priorities it is seen that there is a need for display of seat layout for passenger selection during reservation. The present static reservation chart displayed on the train lacks updated information for the usage of enroute passengers. Also there is no facility for finding out details such as actual arrival and departure timing for onboard passengers, catering arrangements and rescue operations for intimation and immediate action. For obtaining technical solution this paper proposes to take the help of modern technologies such as GPS, touch screens, GSM and other advanced communication system. Alarm, trip system and interlock can be provided in the hardware for meeting exigency.
In an era of fiscal austerity, downsizing and unforgiving pressure upon human and economic capital, it is an Augean task to identify resources for fresh and creative work. The realities of the day and the practical de...
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In an era of fiscal austerity, downsizing and unforgiving pressure upon human and economic capital, it is an Augean task to identify resources for fresh and creative work. The realities of the day and the practical demands of more immediate fleet needs can often dictate higher priorities. Yet, the Navy must avoid eating its seed corn. Exercising both technical insight and management foresight, the fleet, the R&D community, the Office of the Chief of Naval Operations (OpNav) and the product engineering expertise of the Naval Surface Warfare Center (NSWC) are joined and underway with integrated efforts to marry new, fully demonstrated technologies and operational urgencies. Defense funding today cannot sponsor all work that can be mission-justified over the long term because budgets are insufficient to support product maturation within the classical development cycle. However, by rigorous technical filtering and astute engineering of both marketplace capabilities and currently available components, it is possible in a few select cases to compress and, in effect, integrate advanced development (6.3), engineering development (6.4), weapon procurement (WPN), ship construction (SCN), operation and maintenance (O&M,N) budgetary categories when fleet criticalities and technology opportunities can happily meet. In short, 6.3 funds can be applied directly to ''ripe gateways'' so modern technology is inserted into existing troubled or aging systems, sidestepping the lengthy, traditional development cycle and accelerating practical payoffs to recurrent fleet problems. To produce such constructive results has required a remarkable convergence of sponsor prescience and engineering workforce excellence. The paper describes, extensively, the philosophy of approach, transition strategy, polling of fleet needs, technology assessment, and management team requirements. The process for culling and selecting specific candidate tasks for SHARP sponsorship (matching operational need with t
作者：
PAIGE, KKCONVERSE, RAUSNLCdr. Kathleen K. Paige
USN:graduated with a BA from the University of New Hampshire in 1970. She received her commission from Officer Candidate School in April 1971 and performed her first tour of duty with VFP-63 NAS Miramar. LCdr. Paige then received her MS from the Naval Post Graduate School in June 1976 and returned to San Diego to serve as Head Support Software Division at the Fleet Combat Direction System Support Activity. In May 1981 she reported to NA VSEA (PMS-408) where she served initially as Chairman of the NAVMAT Software Engineering Environment Working Group. She has been assigned as Deputy AN/UYK-43 Acquisition Manager since October 1981. LCdr. Paige was designated a fully qualified Engineering Duty Officer in December 1983. Robert A. Converse:is presently the Acquisition Manager for the Ada Language System/Navy (ALS/N) for the Naval Sea Systems Command Tactical Embedded Computer Resources Project. As such
he is responsible for the definition and development of the ALS/N to be provided as a Navy standard computer programming system for Navy mission critical applications. Mr. Converse received a Bachelor of Science degree in Physics from Wheaton College Wheaton II. He spent fourteen years with the Naval Underwater Systems Center Newport Rhode Island during which time he designed and developed the Fortran compiler for the Navy Standard AN/UYK-7 computer. Also during that period he received a Master of Science degree in Computer Science from the University of Rhode Island. His thesis for that degree was entitled “Optimization Techniques for the NUSC Fortran Cross-Compiler”. Mr. Converse started his involvement with the Ada program in 1975 with the initial “Strawman” requirements review. Subsequently he was named as the Navy Ada Distinguished Reviewer and was intimately involved in the selection and refinement of the Ada language as it evolved to become ANSI/MIL-STD-1815A.
The U.S. Navy introduced the use of digital computers in mission critical applications over a quarter of a century ago. Today, virtually every system in the current and planned Navy inventory makes extensive use of co...
The U.S. Navy introduced the use of digital computers in mission critical applications over a quarter of a century ago. Today, virtually every system in the current and planned Navy inventory makes extensive use of computer technology. Computers embedded in mission critical Navy systems are integral to our strategic and tactical defense capabilities. Thus, the military power of the U.S. Navy is inextricably tied to the use of programmable digital computers. The computer program is the essential element that embodies the system “intelligence”. In addition, it provides the flexibility to respond to changing threats and requirements. However, this very flexibility and capability poses a host of difficulties hindering full realization of the advantages. This paper describes the lessons learned about computer program development over the past twenty five years and discusses a software engineering process that addresses these lessons. It then describes how Ada and its related Ada Programming Support and Run-Time Environments foster this software engineering process to improve computer program productivity and achieve greater system reliability and adaptibility. Finally, the paper discusses how the use of Ada and its environments can enhance the interoperability and transferability of computer programs among Navy projects and significantly reduce overall life cycle costs for Navy mission critical computer programs.
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