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A nested transaction mechanism for LOCUS

Erik T. Mueller, Johanna D. Moore, Gerald J. Popek
1983 Proceedings of the ninth ACM symposium on Operating systems principles - SOSP '83  
A working implementation of nested transactions has been produced for LOCUS, an integrated distributed operating system which provides a high degree of network transparency.  ...  Thus nested transactions are the basis for a generalpurpose reliable programming environment in which transactions are modules which may be composed freely.  ...  Thus a nested transaction mechanism must provide proper synchronization and recovery for subtransactions.  ... 
doi:10.1145/800217.806616 dblp:conf/sosp/MuellerMP83 fatcat:2jyf7vlxyffytohrfgzhgzsi5i

Transactions and synchronization in a distributed operating system

Matthew J. Weinstein, Thomas W. Page, Brian K. Livezey, Gerald J. Popek
1985 ACM SIGOPS Operating Systems Review  
The design and implementation is done in the context of Locus, a high performance distributed Unix operating system for local area networks.  ...  A fully distributed operating system transaction facility with fine-grain record level synchronization is described.  ...  Instead, transactions in Locus are simple-nested. The semantics of simple-nested transactions are straightforward. A non-transaction process starts a transaction by issuing a BeginTrans call.  ... 
doi:10.1145/323627.323640 fatcat:dzasrwnf2zasto3hue5phfbv7e

Page 92 of American Society of Civil Engineers. Collected Journals Vol. 118, Issue CP1 [page]

1992 American Society of Civil Engineers. Collected Journals  
Transaction Groups A transaction group (Fernandez and Zdonik 1988) is a process that is the locus of control for a set of cooperating transactions.  ...  Thus, nested transactions provide smaller units for transaction commits, recovery, and rollback. Nested transactions abide by several protocols.  ... 

Genesis

Thomas W. Page, Matthew J. Weinstein, Gerald J. Popek
1985 SIGMOD record  
Substantial portions of this approach are implemented and are operational as extensions to the Locus distributed Unix operating system.  ...  'Ihe prewous LQCUS full nested transaction facilrty was judged inapproprrate for database appkcations The creation of a new heavy weight process for each transaction is too expensive for database transaction  ...  This fully distributed, transparent nested transaction mechanism is operational in Genesis.  ... 
doi:10.1145/971699.318988 fatcat:yq3py663enbape6ko5sbpp25uy

Genesis

Thomas W. Page, Matthew J. Weinstein, Gerald J. Popek
1985 Proceedings of the 1985 ACM SIGMOD international conference on Management of data - SIGMOD '85  
Substantial portions of this approach are implemented and are operational as extensions to the Locus distributed Unix operating system.  ...  'Ihe prewous LQCUS full nested transaction facilrty was judged inapproprrate for database appkcations The creation of a new heavy weight process for each transaction is too expensive for database transaction  ...  This fully distributed, transparent nested transaction mechanism is operational in Genesis.  ... 
doi:10.1145/318898.318988 dblp:conf/sigmod/PageWP85 fatcat:mxefo2zmczewtl7h73v4kffu5e

Concurrency control issues in nested transactions

Theo H�rder, Kurt Rothermel
1993 The VLDB journal  
Therefore,a model for nested transactions is proposed allowing for effective exploitation of intra-transaction parallelism.  ...  First of all, the mechanisms for cooperation and communication within nested transactions should not impede parallel execution of transactions, neither among parent and children nor among siblings.  ...  Schwarz and the referees for their helpful comments on this paper.  ... 
doi:10.1007/bf01231798 fatcat:y4hmsjfcbneutcwz2qpmon7dky

Optimistic Concurrency Semantics for Transactions in Coordination Languages [chapter]

Suresh Jagannathan, Jan Vitek
2004 Lecture Notes in Computer Science  
We provide a semantics for a transactional coordination calculus and state a soundness result for this semantics.  ...  In this paper, we explore the role of an optimistic transactional facility for a Linda-like coordination language.  ...  Support for nested transactions is an important feature of our semantics. A nested transaction defines a locus of computation whose effects are bounded by its parent.  ... 
doi:10.1007/978-3-540-24634-3_15 fatcat:kk2wnoesqrh23allbtep2rztni

A Semantic Framework for Designer Transactions [chapter]

Jan Vitek, Suresh Jagannathan, Adam Welc, Antony L. Hosking
2004 Lecture Notes in Computer Science  
This paper presents a framework for specifying the semantics of a transactional facility integrated within a host programming language.  ...  We give a semantics to TFJ that is parameterized by the definition of the transactional mechanism that permits the study of different transaction models.  ...  The authors thank Krzysztof Palacz for his input.  ... 
doi:10.1007/978-3-540-24725-8_18 fatcat:ysbl7nevczbhbjscuk4irgnaha

Leadership Styles as Predictors of Work Attitudes: A Moderated–Mediation Link

Shkoler Or, Independent Researcher, Israel, Aharon Tziner, Peres Academic Center Netanya Academic College, Israel
2020 Amfiteatru Economic  
Drawing on the recent locus and mechanism models of leadership (Eberly, Johnson, Hernandez & Avolio, 2013) , the purpose of this paper is to begin to explore the role of leadership styles from two different  ...  In addition, we explored the roles of (3) a possible mediational mechanism through which we posited the leadership styles operate (i.e., work drive); and (4) a possible moderator (i.e., organization types  ...  Recently, Hernandez, Eberly, Avolio, and Johnson (2011) , and later Eberly et al. (2013) , created a "locus-mechanism" leadership model consisting of two "composing" elements.  ... 
doi:10.24818/ea/2020/53/164 fatcat:d3wn5ytim5bxhdxb6l75rs4hbu

Transparently Reconciling Transactions with Locking for Java Synchronization [chapter]

Adam Welc, Antony L. Hosking, Suresh Jagannathan
2006 Lecture Notes in Computer Science  
We have implemented monitors for Java that execute using locks when contention is low and switch over to transactions when concurrent attempts to enter the monitor are detected.  ...  We formally argue the correctness of our solution with respect to Java's execution semantics and provide a detailed performance evaluation for different workloads and varying levels of contention.  ...  Acknowledgements We thank the anonymous referees for their suggestions and improvements to this paper. This work is supported by the National Science Foundation under grants Nos.  ... 
doi:10.1007/11785477_8 fatcat:eagipq2frrcgvcgitwqui4gsq4

Page 333 of American Society of Mechanical Engineers. Transactions of the American Society of Mechanical Engineers Vol. 73, Issue 3 [page]

1951 American Society of Mechanical Engineers. Transactions of the American Society of Mechanical Engineers  
If before, and the locus of maxima with respect to c drawn on the A,A;-plane, Fig. 2 results similar to that in these are nested as mentioned The crevice at the upper left-hand corner of the model, Fig  ...  HAHN—DESIGN OF LANCHESTER DAMPER FOR ELIMINATION OF METAL-CUTTING CHATTER Equation {6} for arbitrary values of the mass ratio m/M from 0 to 8.  ... 

The building blocks of job insecurity: The impact of environmental and person-related variables on job insecurity perceptions

Maike E. Debus, Cornelius J. König, Martin Kleinmann
2013 Journal of Occupational and Organizational Psychology  
a steeper incline in job insecurity perceptions with increasing levels of external locus of control relative to employees on a permanent contract).  ...  Among the hypothesized interaction effects, only locus of control significantly interacted with type of contract in predicting job insecurity perceptions (employees on a temporary contract experienced  ...  Acknowledgements This study was supported by a grant from the Schweizerischer Nationalfonds [Swiss Science Foundation, grant 10014-118060]. This grant is gratefully acknowledged. References  ... 
doi:10.1111/joop.12049 fatcat:sq7ett7ntjebnfg3clquly5xqq

Evolution: Social Selection for Eccentricity

Michel Chapuisat
2004 Current Biology  
foundresses, where two or more queens start a nest together; or they may show flexible nest-founding, where either a single queen or multiple queens start a nest.  ...  Paper wasp colonies are well known for having a dominance hierarchy [5, 7, 8] .  ...  with a flexible nest-founding strategy versus those with obligate multiple foundresses.  ... 
doi:10.1016/j.cub.2004.11.023 pmid:15589135 fatcat:zk23xgxvibfjfgppau6cclvxoe

Reproductive concessions between related and unrelated members promote eusociality in bees

Aline C. R. Andrade, Elder A. Miranda, Marco A. Del Lama, Fábio S. Nascimento
2016 Scientific Reports  
Social hymenopterans have been key taxa for the study of Hamilton's inclusive fitness theory because the haplodiploid sex-determination system results in asymmetric relatedness among breeders producing  ...  As expected, a dominant female capitalizes on the direct reproduction of related subordinates, according to her interests. We found that reproductive skew was positively correlated with relatedness.  ...  We also thank Sidnei Mateus for dissections and Diego Santana for the treatments on the figures. Stephen Ferrari and Robbie Price revised the final version of the manuscript.  ... 
doi:10.1038/srep26635 pmid:27211350 pmcid:PMC4876382 fatcat:trky3sl5s5eofe5uulseu7ecc4

Heterokaryosis and sexuality in fungi

J R RAPER
1955 Transactions of the New York Academy of Sciences  
THE NEW YORK ACADEMY OF SCIENCES Asexual Heterothollic Incompatibility Mechanism None 0 1- locus- 2- allele A,a l-locus- oo-ollele A” 2-locus- oo-allele aTb” Distribution Phycomycetes Ascomycetes -Bosidiomycetes  ...  There are different factors at one locus (in forms with a unifactorial mechanism) or at two loci (bifactorial).  ... 
pmid:14396925 fatcat:wcbjdphq3jfsho4piwqy3m6oxu
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