scholarly journals Dining Philosophers Theory and Concept in Operating System Scheduling

2017 ◽  
Author(s):  
Andysah Putera Utama Siahaan
Keyword(s):  
Operating System ◽  
Concurrent Systems ◽  
The Other ◽  
Deadlock Avoidance ◽  
Integer Variable ◽  
Dinner Table ◽  
Race Condition ◽  
Release Method ◽  
Dining Philosophers

This research describes how to avoid deadlock condition in dining philosophers problem. It is the undesirable condition of concurrent systems. It is marked as in a circular waiting state. At first, most people wear concepts simple synchronization is supported by the hardware, such as user or user interrupt routines that may have been implemented by hardware. In 1967, Dijkstra proposed a concept wearer an integer variable to count the number of processes that are active or who are inactive. This type of variable is called semaphore. The mostly semaphore also be used to synchronize the communication between devices in the device. In this journal, semaphore used to solve the problem of synchronizing dining philosophers problem. Dining itself is a situation where five philosophers are sitting at the dinner table to eat spaghetti, every philosopher is given a plate of spaghetti and one chopstick to eat spaghetti the two chopsticks are needed to resolve the issue semaphore variable is then applied to each chopstick chopsticks that can be shared all the other philosopher. This paper presents the efficient distributed deadlock avoidance scheme using lock and release method that prevents other thread in the chain to make race condition.

scholarly journals PERANGKAT LUNAK SIMULASI DEADLOCK MENGGUNAKAN ILUSTRASI DINING PHILOSOPHERS PROBLEM

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Arfiani Nur Khusna ◽  
Nur Rochmah Dyah PA
Keyword(s):  
Operating System ◽  
The State ◽  
The Other ◽  
Resource Usage ◽  
Use Of Resources ◽  
Common Foundation ◽  
Control Resource ◽  
Dining Philosophers

The operating system must be able to control resource usage. In the process of designing the operating system, there is a common foundation called kongkurensi. Processes called kongkuren if processes (more than one process) are at the same time. This is called the multitasking operating system. Kongkuren processes can be completely independent of the other but can also interact with each other. Processes that require synchronization in order to interact properly controlled. However, the processes that interact kongkuren, there are problems to be solved such as deadlock and synchronization. Deadlock occurs because a set of processes in a block where every process of bringing a resource and waiting to get the resources brought by another process so there is a wait state which will never expire (deadlock).Dining Philosophers Problem is an illustration of the possibility of a deadlock, a condition in which two or more processes can not continue its execution as they waited for the use of resources. Dining Philosophers problem can be illustrated, there are five philosophers sitting around a table. Five philosophers is an illustration of the five processes with the state of the process of mutual waiting to use the resources.The results of this study are to describe the state of software deadlocks using illustrations dining philosophers problem with illustrations of all the philosophers were in a state of hunger and holding chopsticks in hand to the left, there will be a deadlock condition.Keywords: deadlock, dining philosophers problem, simulation

Determination of Factor XIII Activity and of Factor XIII Inhibitors Using an Ammonium-Sensitive Electrode

1983 ◽  
Vol 50 (02) ◽  
pp. 563-566 ◽  
Author(s):  
P Hellstern ◽  
K Schilz ◽  
G von Blohn ◽  
E Wenzel
Keyword(s):  
Factor Xiii ◽  
Normal Subjects ◽  
The Other ◽  
Activity Measurement ◽  
Factor Xiii Deficiency ◽  
Assay Procedure ◽  
Stabilization Factor ◽  
Release Method ◽  
Sensitive Electrode

SummaryAn assay for rapid factor XIII activity measurement has been developed based on the determination of the ammonium released during fibrin stabilization. Factor XIII was activated by thrombin and calcium. Ammonium was measured by an ammonium-sensitive electrode. It was demonstrated that the assay procedure yields accurate and precise results and that factor XIII-catalyzed fibrin stabilization can be measured kinetically. The amount of ammonium released during the first 90 min of fibrin stabilization was found to be 7.8 ± 0.5 moles per mole fibrinogen, which is in agreement with the findings of other authors. In 15 normal subjects and in 15 patients suffering from diseases with suspected factor XIII deficiency there was a satisfactory correlation between the results obtained by the “ammonium-release-method”, Bohn’s method, and the immunological assay (r1 = 0.65; r2= 0.70; p<0.01). In 3 of 5 patients with paraproteinemias the values of factor XIII activity determined by the ammonium-release method were markedly lower than those estimated by the other methods. It could be shown that inhibitor mechanisms were responsible for these discrepancies.

scholarly journals Evaluating Latency in Multiprocessing Embedded Systems for the Smart Grid

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3322
Author(s):  
Sara Alonso ◽  
Jesús Lázaro ◽  
Jaime Jiménez ◽  
Unai Bidarte ◽  
Leire Muguira
Keyword(s):  
Operating System ◽  
Smart Grid ◽  
Real Time ◽  
Processing System ◽  
The Other ◽  
Programmable Logic ◽  
Detailed Characterization ◽  
Timing Constraint ◽  
Time Part

Smart grid endpoints need to use two environments within a processing system (PS), one with a Linux-type operating system (OS) using the Arm Cortex-A53 cores for management tasks, and the other with a standalone execution or a real-time OS using the Arm Cortex-R5 cores. The Xen hypervisor and the OpenAMP framework allow this, but they may introduce a delay in the system, and some messages in the smart grid need a latency lower than 3 ms. In this paper, the Linux thread latencies are characterized by the Cyclictest tool. It is shown that when Xen hypervisor is used, this scenario is not suitable for the smart grid as it does not meet the 3 ms timing constraint. Then, standalone execution as the real-time part is evaluated, measuring the delay to handle an interrupt created in programmable logic (PL). The standalone application was run in A53 and R5 cores, with Xen hypervisor and OpenAMP framework. These scenarios all met the 3 ms constraint. The main contribution of the present work is the detailed characterization of each real-time execution, in order to facilitate selecting the most suitable one for each application.

scholarly journals I Like Vegetables: A Touch-and-Feel Board Book by L. Siminovich

2011 ◽  
Vol 1 (1) ◽  
Author(s):  
Kim Frail
Keyword(s):  
Cross Section ◽  
Public Services ◽  
Picture Book ◽  
The Other ◽  
Learning Method ◽  
University Of Alberta ◽  
Young Readers ◽  
Dinner Table ◽  
Wood Grain ◽  
The University

Siminovich, Lorena. I Like Vegetables: A Touch-and-Feel Board Book. Somerville: Candlewick Press, 2011. Print.“I Like Vegetables” is a dream come true for any nutritionally conscience parent, children’s librarian or teacher. The brightly hued collage illustrations are intriguingly textured with patterns and “touch & feel” inlays. Silky peas and rough-skinned carrots invite young readers to learn about vegetables. The layout is quite clever as it leverages contrast and comparison as a learning method. On one side of the page vegetables are depicted as they would appear growing in the garden while on the other side they are in the home being prepared for the dinner table. In addition, the nature side of the page illustrates the concept of opposites. For example, there are “tall” and “short” cornstalks. Orange carrot roots are “below” the ground, while the feathery green tops are “above”. The indoor side of the page features close-ups of vegetables against a wood-grain background that evokes a cutting board. Here children get a different perspective on the harvested veggies. We see shelled peas, open cornhusks and a cross-section of a pumpkin. The concluding series of images features an “empty” gardener’s basket next to a basket “full” of colourful vegetables on a blue and white gingham picnic tablecloth inlay.  This is primarily a picture book with only the names of the vegetables and the two opposing concepts appearing on each page. The typeset is Helvetica and is large and easy to read.  It is a sturdy board book and the inlays could not be easily ripped out or damaged. It is therefore a welcome addition to any toddler’s library. Other titles in the “I Like” series by Siminovich include: “I Like Toys “, “I Like Bugs” and “I Like Fruit”. “I Like Vegetables” is sure to engage children from ages 1-3. Highly recommended: 4 out of 4 stars Reviewer: Kim FrailKim is a Public Services Librarian at the H.T. Coutts Education Library at the University of Alberta. Children’s literature is a big part of her world at work and at home. She also enjoys gardening, renovating and keeping up with her two-year old. 

scholarly journals Laboratory environment monitoring and specimen transport robots

2019 ◽  
Vol 8 (4) ◽  
pp. 313
Author(s):  
Yi-Chang Wu ◽  
Huan-Chun Wang
Keyword(s):  
Operating System ◽  
Resource Allocation ◽  
Humidity Sensor ◽  
The Other ◽  
Robotic Arm ◽  
Environment Monitoring ◽  
Thermal Camera ◽  
Laboratory Environment ◽  
Robot Operating System ◽  
And Control

Robots have been used in various areas to replace manpower, reduce costs, and facilitate more effective resource allocation. This study sought to assist the business of the bureau by developing two robots using the Robot Operating System. The developed robots have autonomous intelligent navigation functions and are suited to monitor the environment of <br /> the laboratories in the bureau. One robot had a temperature and humidity sensor and an infrared thermal camera, and it could be used to patrol and monitor the laboratory environment. The other robot had drawers in which specimens could be placed; robotic arm in the elevator could coordinate and control elevators, enabling the robot to move and transport specimens autonomously. Plenty of tests were conducted to verify the feasibility <br /> and practicality.

AN IMPERFECT PROCESS POLICY WITH PRODUCTION CORRECTION AND REORGANIZATION

2007 ◽  
Vol 14 (02) ◽  
pp. 157-168
Author(s):  
GWO-LIANG LIAO
Keyword(s):  
Operating System ◽  
The Other ◽  
Type I ◽  
Type Ii ◽  
Production Mechanism ◽  
Imperfect Production ◽  
Production Processes ◽  
The Mean ◽  
Control State ◽  
Renewal Cycle

This study applies imperfect production processes to obtain in-control state by production correction and reorganization. Production processes are classified into two types of state: one is the type I state (out-of-control state) and the other is the type II state (in-control state). The type I state involves adjustment of the production mechanism. Production correction is either imperfect; worsening a production system, or perfect, returning it to "in-control" conditions. After N type I states, the operating system must be reorganized and returned to the beginning condition. At the beginning of the production of the each renewal cycle, the state of the process is not always to be restored to "in-control". The mean loss cost until "in-control" state, is determined. The existence of a unique and finite optimal N for an imperfect process under certain reasonable conditions is shown. A numerical example is presented.

scholarly journals Classification of Smart Card Operating Systems

2014 ◽  
Vol 3 (1) ◽  
pp. 13-22
Author(s):  
Reza Asgari ◽  
Reza Ebrahimi Atani
Keyword(s):  
Operating System ◽  
Operating Systems ◽  
Smart Card ◽  
Smart Cards ◽  
The Other ◽  
Open Architecture ◽  
Single Application ◽  
Hardware Development ◽  
The One

Today, smart cards are widely used in variety of applications of human life.The nature of these cards depends on theirs operating system, in other words the operating system determines that card can be used in what field. Hardware development on the one hand and increasing use of smart cards on the other, have led to that the operating systems have progressed dramatically.Moving from special-purpose operating systems with single application into multi-purpose operating systems with open architecture, is proof of claim.Increase the number of operating systems and variety of their applications, caused that the need to categorize and classify operating systems be felt more than ever.Smart card operating systems can be categorized based on different parameters such as file management, applications management, and historical generations. In this paper we will discussion about smart card operating systems and their classification based on these parameters.

scholarly journals CAUSAL REVERSIBILITY IN INDIVIDUAL TOKEN INTERPRETATION OF PETRI NETS

2020 ◽  
Vol 21 (4) ◽  
Author(s):  
Adel Benamira
Keyword(s):  
Petri Nets ◽  
Arbitrary Order ◽  
Concurrent Systems ◽  
The Other ◽  
Initial State

Causal reversibility in concurrent systems means that events that the origin of other events can only be undone after undoing of its consequences. In opposite to backtracking, the events which are independent of each other can be reversed in an arbitrary order, in the other words, we have flexible reversibility w.r.t the causality relation. An implementation of Individual token interpretation ofPetri Nets (IPNs) was been proposed by Rob Van Glabbeek et al, the present paper investigates into a study of causal reversibility within IPNs. Given N be an IPN, by adding an intuitive firing rule to undo transitions according to the causality relation, the coherence of N is assured, i.e., the set of all reachable states of N in the reversible version and that of the original one are identical. Furthermore, reversibility in N is flexible and their initial state can be accessible in reverse from any state. In this paper an approach for controllingcausal-reversibility within IPNs is proposed.

scholarly journals ANDROID APPLICATION FOR MEASURING HUMAN BODY TEMPERATURE AND FORCASTING FUTURE ILLNESS

2014 ◽  
pp. 161-164
Author(s):  
S PRABHAKARAN ◽  
DHANESHWARI KUMARI ◽  
RIA AHUJA
Keyword(s):  
Operating System ◽  
Body Temperature ◽  
Mobile Device ◽  
Human Body ◽  
The Body ◽  
The Other ◽  
Android Application ◽  
Human Body Temperature ◽  
Normal Human ◽  
Android Operating System

Android Application for measuring human body temperature is a new age mobile thermometer. This kind of application already exists but requires manual feeding temperature. In our project, we propose an application which will measure the body temperature automatically while the user is operating the mobile device. It has an in-built function which can trigger alert messages whenever the temperature becomes critical more than normal human body temperature. The display segment of the device is made up of capacitive touch screen, which can act upon the bioelectricity produced by human body with each and every touch. This application requires Android Operating System Version 2.2. It will also diagnose the other diseases the user might have depending upon the symptoms entered.

"Thunder Is When the Angels Are Upstairs Bowling": Narratives and Explanations at the Dinner Table

1994 ◽  
Vol 4 (4) ◽  
pp. 331-352 ◽  
Author(s):  
Diane E. Beals ◽  
Catherine E. Snow
Keyword(s):  
Young Children ◽  
The Other ◽  
Natural Mode ◽  
Parallel Development ◽  
Dinner Table ◽  
Preschool Aged Children

Abstract The domain of narrative is often assumed to be the first extended discourse genre accessible to young children, and a natural mode for representing and remembering information. Ultimately, however, children must move beyond narrative to include other genres within their competency, such as explanation. Furthermore, narrative and explanation share a number of features that might lead one to expect more or less parallel development. We studied the occurrence of narrative and explanatory sequences of talk during mealtimes in 31 lowincome families with preschool-aged children. Narrative and explanatory sequences constituted approximately equal percentages of the total talk, but explanatory sequences were much briefer and more frequent than narrative sequences. Equivalent measures of narrative and explanatory talk showed moderate correlations, suggesting that families that engaged in one type of discourse also engaged in the other; this suggestion was confirmed by the finding that a large proportion of explanatory utterance were also parts of narratives. As 3- and 4-year-olds, children participated more competently in narrative than in explanatory discourse, though they requested many explanations at all ages. (Discourse Genres; Explanation; Development)

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