The periodic reorganization process in Paramaecium caudatum

The structure of trichocysts in Paramecium caudatum.

The structure of undischarged and discharged trichocysts has been examined in Paramecium caudatum, and their light-microscopic appearance compared with their fine-structural organization. In living specimens undischarged trichocysts appear to be of a single type with a unimodal variation in length about a mean of 37 fim. When fixed for electron microscopy or compressed beneath a coverslip many ...

A Degradable B-Tree with Periodic Data Reorganization

The classic B-tree data structure due to Lehman and Yao [8] allows a higher level of concurrency than traditional B‡trees [4] (called B*-trees by Lehman and Yao) for reading, updating, deletion and insertion concurrent operations by introducing cross-linked pointers for nodes at the same level. This unique design, henceforth referred to as the LY algorithm, allows a read operation, which is fun...

Behavioral Mutants in PARAMECIUM CAUDATUM.

Mutants of Paramecium caudatum with abnormal swimming behavior or responses to cations were obtained by mutagenesis with N-methyl-N'-nitro-N-nitrosoguanidine. Some of the mutants, like pawn in P. tetraurelia, cannot swim backward and are called CNR. Seven independently obtained CNR mutants belonged to three complementation groups, designated as cnrA, cnrB and cnrC. Some characteristics of doubl...

Studies in the Respiration of Paramecium Caudatum

مازاد سرمایه در زمان ورشکستگی در مدل ریسک کلاسیک با عامل اغتشاش on the surplus prior to ruin in the perturbed classical risk process

هدف این تحقیق در نظر گرفتن مدل ریسک کلاسیک که با عامل فرآیند وینر ، به مدل ریسک کلاسیک با عامل اغتشاش تبدیل می شود. در این تحقیق فرمول هایی صریح برای تابع چگالی احتمال توام و حاشیه ای مقدار مازاد سرمایه بلافاصله قبل و در زمان ورشکستگی و همچنین تابع چگالی احتمالی برای مقادیر و اندازه خسارت هایی که باعث ورشکستگی شده اند، بررسی می شود. نیاز برای چنین تحقیقی بدین سبب احساس می شود که در مدل ریسک کل...