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An approximate solution for Ph/Ph/1 and Ph/Ph/1/N queues [PDF]
Proceedings of the 3rd ACM/SPEC International Conference on Performance Engineering, 2012 We propose a simple approximation to assess the steady-stateprobabilities of the number of customers in Ph/Ph/1 andPh/Ph/1/N queues, as well as probabilities found on arrival,including the probability of buffer overflow for the Ph/Ph/1/Nqueue. The phase-type distributions considered are assumed to beacyclic.
Brandwajn, Alexandre, Begin, Thomas
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The PH/PH/1 Multi-threshold Queue [PDF]
, 2014 We consider a PH/PH/1 queue in which a threshold policy determines the stage of the system. The arrival and service processes follow a Phase-Type (PH) distribution depending on the stage of the system. Each stage has both a lower and an upper threshold at which the stage of the system changes, and a new stage is chosen according to a prescribed ...
Niek Baer +2 more
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Evidence for the adaptation of protein pH-dependence to subcellular pH [PDF]
BMC Biology, 2009 The availability of genome sequences, and inferred protein coding genes, has led to several proteome-wide studies of isoelectric points. Generally, isoelectric points are distributed following variations on a biomodal theme that originates from the predominant acid and base amino acid sidechain pKas.
Chan, Pedro, Warwicker, Jim
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The A. Ph. A. membership [PDF]
The Journal of the American Pharmaceutical Association (1912), 1917 n ...
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, 2014 The author greatly appreciate suggestions and help of Professor Lew Gordeew and the anonymous reviewers for their comments and ...
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Science of The Total EnvironmentThis paper highlights the critical role of pH or proton activity measurements in environmental studies and emphasises the importance of applying proper statistical approaches when handling pH data. This allows for more informed decisions to effectively manage environmental data such as from mining influenced water.
Kagiso Samuel More +1 more
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IEEE Engineering in Medicine and Biology Magazine, 2004 Acid-base balance is altered in a variety of common pathologies, including COPD, ischemia, renal failure, and cancer. Because of robust cellular pH homeostatic mechanisms, most of the pathological alterations in pH are expressed as changes in the extracellular, systemic pH.
Natarajan Raghunand +3 more
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Instrumentation viewpoint, 2012 This paper presents a design of a marine instrument for the measurement of pH in seawater. The measurement system consists of a pH electrode connected to the underwater observatory OBSEA. The extracted data are useful for scientists researching ocean acidification.
Artero, C. +2 more
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Une solution approchée pour les files Ph/Ph/1 et Ph/Ph/1/N [PDF]
, 2011 Nous proposons une approximation simple pour évaluer les probabilités stationnaires du nombre de clients et les probabilités d'état trouvées à l'arrivée dans les files Ph/Ph/1 et Ph/Ph/1/N. Pour cette dernière, ceci inclut la probabilité du dépassement de capacité. Les distributions de type phase considérées ici sont acycliques.
Begin, Thomas, Brandwajn, Alexandre
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