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Thoth, a portable real-time operating system

David R. Cheriton, Michael A. Malcolm, Lawrence S. Melen, Gary R. Sager
1979 Communications of the ACM  
Thoth is a real-time operating system which is designed to be portable over a large set of machines. It is currently running on two minicomputers with quite different architectures.  ...  Because the system is implemented by the same software on different hardware, it has the same interface to user programs. Hence, application programs which use Thoth are highly portable.  ...  Concluding Remarks The original objectives of developing Thoth were to investigate the feasibility of portable operating systems and to provide a tool for teaching real-time programming of minicomputers  ... 
doi:10.1145/359060.359074 fatcat:r35kq4ofifazxntdo44bvzlwry

Thoth, a portable real-time operating system (Extended Abstract)

David R. Cheriton, Michael A. Malcolm, Lawrence S. Melen, Gary R. Sager
1977 ACM SIGOPS Operating Systems Review  
Extended Abstract Thoth is a portable real-time operating system which has been developed at the University of Waterloo.  ...  Various configurations of Thoth have been running since May 1976; it is currently running on two minicomputers with quite different architectures (Texas Instruments 990 and Data General NOVA).  ...  A third design goal is that the system meet the demands of real-time applications.  ... 
doi:10.1145/1067625.806560 fatcat:3hxhco3jgzcf3kh3wn4a3tjg4a

The use of geographical informational systems in modern agriculture

Stefan Ghimisi
2021 Journal of Research and Innovation for Sustainable Society  
Precision agriculture is a subsystem of sustainable and ecological agriculture systems, but also for the intensive agriculture system.  ...  In recent years, farmers have gained access to new technologies through the use of GPS-Global Positioning System and Decision Support Systems, which were previously a monopoly of the military arsenal,  ...  The systems for tracking the agricultural fleet allow the location in real time or according to a history, of the agricultural machines and of the employees who use them, from any computer or phone connected  ... 
doi:10.33727/jriss.2021.2.10:95-102 fatcat:tuoaswizxzbexbzj6yfdmrsuye

Page 64 of Journal of Research and Practice in Information Technology Vol. 20, Issue 2 [page]

1988 Journal of Research and Practice in Information Technology  
., MELEN, S. and SAGER, G.R. (1979): Thoth, a Portable Real-Time Operating System, Comm. ACM, Vol. 22, No. 2 (February 1979), pp. 105-115.  ...  A Distributed Operating System Kernel for a Closely-Coupled Multiprocessor Foundation for UNIX Development, Proc. USENIX Conference (June 1986), pp. 93-112.  ... 


C. Tsouvaltsidis, N. Zaid Al Salem, G. Benari, D. Vrekalic, B. Quine
2015 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
In the last five years that Argus has been in operation, we have made over 200 observations over a series of land and ocean targets.  ...  However, limitations in the volume of data due to onboard power constraints and a lack of an onboard camera system make it very difficult to verify these objectives using ground truth.  ...  Vrekalic's guidance was instrumental in aiding to design a UAV system that would be rugged enough to perform field work and gentle enough for a beginner to fly.  ... 
doi:10.5194/isprsarchives-xl-1-w4-25-2015 fatcat:bbgu3eu7tvca7jyz7rqqbgl4qy

Analysis of Operating System Using TOPSIS MCDM Method

A Pon Bharathi, M Ramachandran, Sathiyaraj Chinnasamy, Malarvizhi Mani
2022 Electrical and Automation Engineering  
Operating systems are computer software a user and a computer is between Communications an operating system.  ...  TOPSIS (Technique for Order of Preference by Similarity to Ideal Solution) analysis using the Operating system 1, Operating system 2, Operating system 3, Operating system 4, Operating system 5 Alternative  ...  Operating system portability addresses a very common problem with minicomputers.  ... 
doi:10.46632/eae/1/2/7 fatcat:hapkusdwkbh6dp3je6jdljmsdy

Flash: An efficient and portable Web server

Vivek S. Pai, Peter Druschel, Willy Zwaenepoel
1999 USENIX Annual Technical Conference  
Furthermore, the Flash Web server is easily portable since it achieves these results using facilities available in all modern operating systems.  ...  Results indicate that Flash can match or exceed the performance of existing Web servers by up to 50% across a wide range of real workloads.  ...  The Flash server and its AMPED architecture bear some resemblance to Thoth [9] , a portable operating system and environment built using "multi-process structuring."  ... 
dblp:conf/usenix/PaiDZ99 fatcat:rmnug2hcffb5bgtth6ymdszqfq

Using Active Objects for Structuring Service Oriented Architectures. Anthropomorphic Programming with Actors

Dave Thomas, Brian Barry
2004 Journal of Object Technology  
It has a portable real-time multitasking multiprocessing kernel and is based on simple primitives: Blocking Send, Blocking Receive, Reply, Create, Terminate and special forms for Non-Blocking Receive and  ...  J OURNAL OF OBJECT TECHNOLOGY V OL. 3, NO. 7 Message Based OS Kernels Thoth was the archetype operating system that was developed at the University of Waterloo in the late 1970's.  ...  Brian has over 20 years of experience in the design and implementation of object-oriented and component-based systems, including distributed, client/server, embedded and real-time applications.  ... 
doi:10.5381/jot.2004.3.7.c1 fatcat:5tr2zbd26vhtnnsjjb6soq742m

Researches concerning the hydraulic oil degradation process in gear pumps

Alexandru Daniel Marinescu, Alexandru Valentin Radulescu, Irina Radulescu
2021 Journal of Research and Innovation for Sustainable Society  
Experimental results have been obtained using a Brookfield CAP2000+ viscometer, for determining the oil rheological parameters.  ...  Alabi and the collaborators predict the failure of an equipment, with the help of a real-time lubricating oil analysis [9] .  ...  with icountLaserCM saves time and saves money.  Contamination monitoring is possible during applicaton operation -icountLaserCM saves on production downtime.  Data entry allows individual equipment  ... 
doi:10.33727/jriss.2021.2.5:43-52 fatcat:g4eggvqumzc7hhjtltg3v5gwva

A Portable Search Light for Fire Department Use

1900 Scientific American  
system of sewers.  ...  FEBRUARY 3. 1900• Hermopolis was the patron city of the ibis, and it was imported into Italy in early times and kept at the tem ples of Isis, the em blem of Thoth, the secretary of Osiris, and  ... 
doi:10.1038/scientificamerican02031900-72a fatcat:yuiocpi7zvg2pa7glzprvxybdi

Distributed process groups in the V Kernel

David R. Cheriton, Willy Zwaenepoel
1985 ACM Transactions on Computer Systems  
This abstraction is used as a software base for constructing distributed systems. As a distributed kernel, the V kernel makes intermachine boundaries largely transparent.  ...  Examples include the group of tile servers, a group of processes executing a particular job, and a group of processes executing a distributed parallel computation.  ...  This is true for both the one-to-one and group real-time send operations. Examples include distributed game programs, distributed monitoring, and real-time group communication in general.  ... 
doi:10.1145/214438.214439 fatcat:7di35ut2hrdlpovhqopctb5eae

Data mining and clinical data repositories: Insights from a 667,000 patient data set

Irene M. Mullins, Mir S. Siadaty, Jason Lyman, Ken Scully, Carleton T. Garrett, W. Greg Miller, Rudy Muller, Barry Robson, Chid Apte, Sholom Weiss, Isidore Rigoutsos, Daniel Platt (+2 others)
2006 Computers in Biology and Medicine  
records from an academic medical system.  ...  of clinical events and time series analysis.  ...  Pattern discovery/THOTH quotes the observed number of times the rule is seen, the Fraction of consequent given antecedent as a measure of P (A&B&C)/P (A&B) as a weight of the rule "If A & B then C" (Tables  ... 
doi:10.1016/j.compbiomed.2005.08.003 pmid:16375883 fatcat:dzjo5mleq5e2pnozx4mrbfajx4

UIO: a uniform I/O system interface for distributed systems

David R. Cheriton
1987 ACM Transactions on Computer Systems  
I am indebted to the members of the Stanford Distributed Systems Group for the implementation of the UIO interface in the V distributed system and the further refinement of the interface that resulted,  ...  on the real I/O service.  ...  Examples of servers implementing the UIO interface currently in use in the V-System include: Storage : A standard UNIX-like hierarchical file server [8] based on the Thoth file system [5], with some extensions  ... 
doi:10.1145/7351.7353 fatcat:is3fu24zgrccrile2av6zw2qhy

Planetary micro-rover operations on Mars using a Bayesian framework for inference and control

Mark A. Post, Junquan Li, Brendan M. Quine
2016 Acta Astronautica  
2016) Planetary micro-rover operations on Mars using a Bayesian framework for inference and control. Acta Astronautica, 120. pp. 295-314. ISSN 0094-5765 , http://dx.(Mark A.  ...  Certainly real-time control of a rover on another planet is infeasible, as the delay in communicating a signal to Mars at the speed of light ranges from 3 to 21 minutes, not even considering temporary  ...  To evaluate performance in a real-world scenario, this system is implemented on a small micro-rover prototype and tested in an outdoor area with obstacles present.  ... 
doi:10.1016/j.actaastro.2015.12.019 fatcat:s5xts7afqjfzpoiugpvvdt6wfy

Performance evaluation of communicating processes

Ilya Gertner
1979 Proceedings of the 1979 ACM SIGMETRICS conference on Simulation, measurement and modeling of computer systems - SIGMETRICS '79  
"Thoth, a Portable Real-Time Operating System", Comm. CACM, February 1979. Processes", in Programming Languages, ed Genuys F., Academic Press, N.Y., pp. 43-112, 1968.  ...  new formalism, tested it on a real system, and used the results to support the value of finite state machines.  ...  Our experience with a real system indicates that our methods are sound, that even a crude finite state machine model is adequate for finding performance bugs.  ... 
doi:10.1145/800188.805461 fatcat:4ozborbc6zht3lfj43wja3oq3a
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