scholarly journals Deco: A Decentralized, Cooperative Atomic Commit Protocol

2012 ◽  
Vol 2012 ◽  
pp. 1-14
Author(s):  
Daniel J. Buehrer ◽  
Chun-Yao Wang
Keyword(s):  
Three Phase ◽  
The Coordinator ◽  
Atomic Commit ◽  
Commit Protocol

An atomic commit protocol can cause long-term locking of databases if the coordinator crashes or becomes disconnected from the network. In this paper we describe how to eliminate the coordinator. This decentralized, cooperative atomic commit protocol piggybacks transaction statuses of all transaction participants onto tokens which are passed among the participants. Each participant uses the information in the tokens to make a decision of when to go to the next state of a three-phase commit protocol. Transactions can progress to ensure a uniform agreement on success or failure, even if the network is partitioned or nodes temporarily crash.

scholarly journals The colonization of the oceans by calcifying pelagic algae

2019 ◽  
Vol 16 (12) ◽  
pp. 2501-2510 ◽  
Author(s):  
Baptiste Suchéras-Marx ◽  
Emanuela Mattioli ◽  
Pascal Allemand ◽  
Fabienne Giraud ◽  
Bernard Pittet ◽  
...  
Keyword(s):  
Evolutionary History ◽  
Middle Eocene ◽  
World Ocean ◽  
Ecological Interactions ◽  
Accumulation Rates ◽  
Calcareous Nannoplankton ◽  
Evolutionary Dynamic ◽  
Three Phase ◽  
Establishment Phase

Abstract. The rise of calcareous nannoplankton in Mesozoic oceans has deeply impacted ocean chemistry and contributed to shaping modern oceans. Nevertheless, the calcareous nannoplankton colonization of past marine environments remains poorly understood. Based on an extensive compilation of published and unpublished data, we show that their accumulation rates in sediments increased from the Early Jurassic (∼200 Ma) to the Early Cretaceous (∼120 Ma), although these algae diversified up to the end of the Mesozoic (66 Ma). After the middle Eocene (∼45 Ma), a decoupling occurred between accumulation rates, diversity and coccolith size. The time series analyzed points toward a three-phase evolutionary dynamic. An invasion phase of the open-ocean realms was followed by a specialization phase occurring along with taxonomic diversification, ended by an establishment phase where a few small-sized species dominated. The current hegemony of calcareous nannoplankton in the world ocean results from a long-term and complex evolutionary history shaped by ecological interactions and abiotic forcing.

Assessment of Serviceability Based on Corrosion Cracking during a Long-Term Chloride-Induced Corrosion

2011 ◽  
Vol 255-260 ◽  
pp. 639-643
Author(s):  
Rui Jin Zhang ◽  
Hui Lin Yang
Keyword(s):  
Fem Analysis ◽  
Corrosion Cracking ◽  
Reinforcement Corrosion ◽  
Transfer Length ◽  
Rc Structure ◽  
Three Phase ◽  
Service Load ◽  
Chloride Environment ◽  
Non Destructive

In this paper, a non-destructive analytical method was proposed to predict the serviceability of corroded RC structure from corrosion cracking. Two models of corroded reinforced concrete were proposed to take into account the influence of corrosion pattern. Based on a three-phase model linking corrosion cracking and reinforcement corrosion and the transfer length, the models allowed quantification of the effect of the steel cross-section loss and the deterioration of the steel-concrete bond. Using a macro-element FEM analysis, the serviceability models were performed on a corroded beam stored in a chloride environment under sustain loading to predict the deflection of mid-pan under service load and compare with the experimental results.

scholarly journals Residential care in Italy

2002 ◽  
Vol 181 (3) ◽  
pp. 220-225 ◽  
Author(s):  
G. De Girolamo ◽  
A. Picardi ◽  
R. Micciolo ◽  
I. Falloon ◽  
A. Fioritti ◽  
...  
Keyword(s):  
Residential Care ◽  
Psychiatric Patients ◽  
Full Time ◽  
Structured Interviews ◽  
Term Care ◽  
Discharge Rates ◽  
Marked Variability ◽  
Phase Study ◽  
Three Phase

BackgroundIn Italy, where all mental hospitals have been gradually phased out since 1978, psychiatric patients requiring long-term care are being treated in non-hospital residential facilities (NHRFs). However, detailed data on these facilities are sparse.AimsThe Progetto Residenze (PROGRES) residential care project is a three-phase study, the first phase of which aims to survey the main characteristics of all Italian NHRFs.MethodStructured interviews were conducted with the manager of each NHRF.ResultsOn 31 May 2000 there were 1370 NHRFs with 17138 beds; an average of 12.5 beds each and a rate of 2.98 beds per 10 000 inhabitants. Residential provision varied ten-fold between regions and discharge rates were very low. Most had 24-hour staffing with 1.42 patients per full-time worker.ConclusionsThere is marked variability in the provision of residential places between different regions; discharge rates are generally low.

scholarly journals Development of Rhabdomyolysis in the Long-term Period of Previous New Coronavirus Infection COVID-19 (Clinical Case Report)

2021 ◽  
Vol 10 (3) ◽  
pp. 452-459
Author(s):  
G. A. Berdnikov ◽  
N. Y. Kudryashova ◽  
E. V. Migunova ◽  
S. I. Rey ◽  
E. V. Gurok ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Renal Function ◽  
Kidney Injury ◽  
Infusion Therapy ◽  
Dynamic Observation ◽  
Three Phase ◽  
One Step ◽  
Coronavirus Infection ◽  
The Right

Relevance. Rhabdomyolysis is one of the complications of the new coronavirus infection COVID-19, which may cause acute kidney injury (AKI). The reason for the development of rhabdomyolysis in our observation in a patient after suffering COVID-19 in the long-term period was an increased muscle load.Aim of study. Presentation of a case of rhabdomyolysis with AKI in a patient after COVID-19 in the long-term period.Material and methods. In clinical observation, a 25-year-old patient L. is presented, who was being treated in the Department for the Treatment of Acute Endotoxicosis of the N.V. Sklifosovsky Research Institute for Emergency Medicine. In 2020, he developed COVID-19, complicated by rhabdomyolysis and AKI in the long term period.Results. Examination revealed an increase in creatinine phosphokinase (CPK) — 106,000.0 U/L, alanine aminotransferase (ALT) — 553.0 U/L, aspartate aminotransferase (AST) — 1582.0 U/L, lactate dehydrogenase (LDH) — 2809.0 U/L, levels of serum creatinine 164 μmol/L and myoglobin — 201 ng/ml. Virological research: IgM — 0.27 units per ml; IgG — 7.28 units per ml. 3 Three-phase scintigraphy with 99mTc-pyrfotech revealed signs of necrotic changes in the muscles of the upper half of the back, muscles of the chest (mainly on the right), muscles of the shoulder and upper half of the forearm on both sides. Kidneys: decreased perfusion of the right kidney (relative to the left), moderate slowdown of urodynamics at the level of the calyx-pelvis complex on both sides.Conclusions. The reason for the development of rhabdomyolysis in the long-term period in the patient after suffering from COVID-19 was an increased muscle load. Targeted research and medical history can help identify signs of rhabdomyolysis. The use of the radionuclide diagnostic method makes it possible to identify areas of soft tissue damage with a one-step assessment of renal function in rhabdomyolysis in the acute period of the disease, as well as to evaluate the effectiveness of treatment with dynamic observation. When rhabdomyolysis is confirmed, it is necessary to carry out detoxification and infusion therapy, to monitor renal function in order to detect acute kidney injury, and in case of deterioration of renal function and intoxication, renal replacement therapy is indicated.

scholarly journals The colonization of the oceans by calcifying pelagic algae

2018 ◽  
Author(s):  
Baptiste Suchéras-Marx ◽  
Emanuela Mattioli ◽  
Pascal Allemand ◽  
Fabienne Giraud ◽  
Bernard Pittet ◽  
...  
Keyword(s):  
Evolutionary History ◽  
Middle Eocene ◽  
World Ocean ◽  
Ecological Interactions ◽  
Accumulation Rates ◽  
Calcareous Nannoplankton ◽  
Evolutionary Dynamic ◽  
Three Phase ◽  
Establishment Phase

Abstract. The rise of calcareous nannoplankton in Mesozoic oceans has deeply impacted ocean chemistry and contributed to shape modern oceans. Nevertheless, the calcareous nannoplankton colonization of past marine environments remains poorly understood. Based on an extensive compilation of published and unpublished data, we show that their accumulation rates in sediments increased from the Early Jurassic (~ 200 Ma) to the Early Cretaceous (~ 120 Ma), although these algae diversified up to the end of the Mesozoic (66 Ma). After the middle Eocene (~ 45 Ma), a decoupling occurred between accumulation rates, diversity and coccolith size. The time series analysed points toward a three-phase evolutionary dynamic. An Invasion phase of the open-ocean realms was followed by a Specialization phase occurring along with taxonomic diversification, ended by an Establishment phase where few small-sized species dominated. The current hegemony of calcareous nannoplankton in the World Ocean results from a long-term and complex evolutionary history shaped by ecological interactions and abiotic forcing.

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