On the performance figures of queuing systems with context-dependent service times

2014 ◽  
Author(s):  
Ivan Mura
Keyword(s):  
Queuing Systems ◽  
Service Times ◽  
Context Dependent

MULTI-CHANNEL FUZZY QUEUING SYSTEMS AND MEMBERSHIP FUNCTIONS OF RELATED FUZZY SERVICES AND FUZZY INTER-ARRIVAL TIMES

2008 ◽  
Vol 25 (05) ◽  
pp. 697-713 ◽  
Author(s):  
ÖZLEM AYDIN ◽  
AYŞEN APAYDIN
Keyword(s):  
Membership Function ◽  
Measurement Errors ◽  
Waiting Times ◽  
Membership Functions ◽  
Queuing Systems ◽  
Queuing Model ◽  
Arrival Times ◽  
Queuing Models ◽  
Service Times ◽  
The One

Queuing models need well defined knowledge on arrivals and service times. However, in real applications, because of some measurement errors or some loss of information, it is hard to achieve deterministic knowledge. Non-deterministic knowledge interferes or complicates analysis of the queuing model. Additionally, when the customers are asked about their impressions on waiting times or service times, mostly the answers are linguistic expressions like "I waited too much", "service was fast", and that the responses are. Linguistic statements and ill defined data make the sense of imprecision in the model. In this study, arrivals and service times are defined as fuzzy numbers in order to represent this imprecision. Fuzzy multi-channel queuing systems and membership functions are introduced in defining the arrivals and service times. Besides, a new membership function based on a probability function is studied. Fuzzy queuing characteristics are calculated via different membership functions and the results are compared on simulations. Among models it is found that, Generalized Beta Distribution membership function is the one that minimized the queuing characteristics.

scholarly journals A Fast Simulation Model Based on Lindley’s Recursion for the G/G/1/K Queue

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
J. L. Vazquez-Avila ◽  
R. Sandoval-Arechiga ◽  
Agustin Perez-Ramirez ◽  
R. Sanchez-Lara ◽  
Homero Toral-Cruz ◽  
...  
Keyword(s):  
Simulation Model ◽  
Performance Metrics ◽  
Discrete Event ◽  
Accurate Estimation ◽  
Queuing Systems ◽  
Fast Simulation ◽  
Closed Form Solutions ◽  
Distributed Service ◽  
Poisson Arrivals ◽  
Service Times

There are many applications where it is necessary to model queuing systems that involve finite queue size. Most of the models consider traffic with Poisson arrivals and exponentially distributed service times. Unfortunately, when the traffic behavior does not consider Poisson arrivals and exponentially distributed service times, closed-form solutions are not always available or have high mathematical complexity. Based on Lindley’s recursion, this paper presents a fast simulation model for an accurate estimation of the performance metrics of G/G/1/K queues. One of the main characteristics of this approach is the support for long-range dependence traffic models. The model can be used to model queuing systems in the same way that a discrete event simulator would do it. This model has a speedup of at least two orders of magnitude concerning implementations in conventional discrete event simulators.

Forming Impressions of Personality

2014 ◽  
Vol 45 (3) ◽  
pp. 153-163 ◽  
Author(s):  
Sanne Nauts ◽  
Oliver Langner ◽  
Inge Huijsmans ◽  
Roos Vonk ◽  
Daniël H. J. Wigboldus
Keyword(s):  
Impression Formation ◽  
Context Dependent

Asch’s seminal research on “Forming Impressions of Personality” (1946) has widely been cited as providing evidence for a primacy-of-warmth effect, suggesting that warmth-related judgments have a stronger influence on impressions of personality than competence-related judgments (e.g., Fiske, Cuddy, & Glick, 2007 ; Wojciszke, 2005 ). Because this effect does not fit with Asch’s Gestalt-view on impression formation and does not readily follow from the data presented in his original paper, the goal of the present study was to critically examine and replicate the studies of Asch’s paper that are most relevant to the primacy-of-warmth effect. We found no evidence for a primacy-of-warmth effect. Instead, the role of warmth was highly context-dependent, and competence was at least as important in shaping impressions as warmth.

Memorial Consequences of Environmental Context Change in Children and Adults

2010 ◽  
Vol 57 (6) ◽  
pp. 455-461 ◽  
Author(s):  
Alp Aslan ◽  
Anuscheh Samenieh ◽  
Tobias Staudigl ◽  
Karl-Heinz T. Bäuml
Keyword(s):  
Elementary School ◽  
Young Adults ◽  
Episodic Memory ◽  
Middle Childhood ◽  
First Graders ◽  
Fourth Graders ◽  
Environmental Context ◽  
Context Change ◽  
Context Dependent

Changing environmental context during encoding can influence episodic memory. This study examined the memorial consequences of environmental context change in children. Kindergartners, first and fourth graders, and young adults studied two lists of items, either in the same room (no context change) or in two different rooms (context change), and subsequently were tested on the two lists in the room in which the second list was encoded. As expected, in adults, the context change impaired recall of the first list and improved recall of the second. Whereas fourth graders showed the same pattern of results as adults, in both kindergartners and first graders no memorial effects of the context change arose. The results indicate that the two effects of environmental context change develop contemporaneously over middle childhood and reach maturity at the end of the elementary school days. The findings are discussed in light of both retrieval-based and encoding-based accounts of context-dependent memory.

Contextual Forgetting and Context Dependent Memory

2002 ◽  
Author(s):  
Jennifer Herbert ◽  
Sharon Bertsch
Keyword(s):  
Context Dependent

Increased context-dependent sensitization to amphetamine in TAAR1-KO mice

2012 ◽  
Author(s):  
I. Sukhanov ◽  
T. D. Sotnikova ◽  
L. Cervo ◽  
R. R. Gainetdinov
Keyword(s):  
Context Dependent
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