scholarly journals Stochastic Comparisons and Dynamic Information of Random Lifetimes in a Replacement Model

Mathematics ◽  
2018 ◽  
Vol 6 (10) ◽  
pp. 204 ◽  
Author(s):  
Antonio Di Crescenzo ◽  
Patrizia Di Gironimo
Keyword(s):  
Fixed Time ◽  
Lifetime Distribution ◽  
Differential Entropy ◽  
Stochastic Comparisons ◽  
Dynamic Information ◽  
Relative Ratio ◽  
Replacement Procedure ◽  
Replacement Model ◽  
Suitable Index

We consider a suitable replacement model for random lifetimes, in which at a fixed time an item is replaced by another one having the same age but different lifetime distribution. We focus first on stochastic comparisons between the involved random lifetimes, in order to assess conditions leading to an improvement of the system. Attention is also given to the relative ratio of improvement, which is proposed as a suitable index finalized to measure the goodness of the replacement procedure. Finally, we provide various results on the dynamic differential entropy of the lifetime of the improved system.

scholarly journals Analysis of the Past Lifetime in a Replacement Model through Stochastic Comparisons and Differential Entropy

Mathematics ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 1203 ◽  
Author(s):  
Antonio Di Crescenzo ◽  
Patrizia Di Gironimo ◽  
Suchandan Kayal
Keyword(s):  
Random Variable ◽  
Fixed Time ◽  
Neuronal Model ◽  
Lifetime Distribution ◽  
Differential Entropy ◽  
Firing Activity ◽  
Stochastic Comparisons ◽  
The Past ◽  
Replacement Procedure ◽  
Replacement Model

A suitable replacement model for random lifetimes is extended to the context of past lifetimes. At a fixed time u an item is planned to be replaced by another one having the same age but a different lifetime distribution. We investigate the past lifetime of this system, given that at a larger time t the system is found to be failed. Subsequently, we perform some stochastic comparisons between the random lifetimes of the single items and the doubly truncated random variable that describes the system lifetime. Moreover, we consider the relative ratio of improvement evaluated at x ∈ ( u , t ) , which is finalized to measure the goodness of the replacement procedure. The characterization and the properties of the differential entropy of the system lifetime are also discussed. Finally, an example of application to the firing activity of a stochastic neuronal model is provided.

The brain structure and neurosecretory cells of noctuid moth Anadevidia peponis: Noctuidae

1990 ◽  
Vol 48 (3) ◽  
pp. 436-437
Author(s):  
M. Sato ◽  
Y. Ogawa ◽  
M. Sasaki ◽  
T. Matsuo
Keyword(s):  
Biological Clock ◽  
Virgin Female ◽  
Basic Structure ◽  
Fixed Time ◽  
Neurosecretory Cells ◽  
Nerve Cells ◽  
Noctuid Moth ◽  
The Right ◽  
20 Nm ◽  
The Brain

A virgin female of the noctuid moth, a kind of noctuidae that eats cucumis, etc. performs calling at a fixed time of each day, depending on the length of a day. The photoreceptors that induce this calling are located around the neurosecretory cells (NSC) in the central portion of the protocerebrum. Besides, it is considered that the female’s biological clock is located also in the cerebral lobe. In order to elucidate the calling and the function of the biological clock, it is necessary to clarify the basic structure of the brain. The observation results of 12 or 30 day-old noctuid moths showed that their brains are basically composed of an outer and an inner portion-neural lamella (about 2.5 μm) of collagen fibril and perineurium cells. Furthermore, nerve cells surround the cerebral lobes, in which NSCs, mushroom bodies, and central nerve cells, etc. are observed. The NSCs are large-sized (20 to 30 μm dia.) cells, which are located in the pons intercerebralis of the head section and at the rear of the mushroom body (two each on the right and left). Furthermore, the cells were classified into two types: one having many free ribosoms 15 to 20 nm in dia. and the other having granules 150 to 350 nm in dia. (Fig. 1).

Age-Related Differences in Processing Dynamic Information to Identify Vowel Quality

1992 ◽  
Vol 35 (4) ◽  
pp. 892-902 ◽  
Author(s):  
Robert Allen Fox ◽  
Lida G. Wall ◽  
Jeanne Gokcen
Keyword(s):  
Older Adults ◽  
Vowel Quality ◽  
Perceptual Cues ◽  
Dynamic Information ◽  
Process Dynamic ◽  
Center Condition ◽  
Age Related ◽  
Control Version ◽  
Older Subjects ◽  
Whole Word

This study examined age-related differences in the use of dynamic acoustic information (in the form of formant transitions) to identify vowel quality in CVCs. Two versions of 61 naturally produced, commonly occurring, monosyllabic English words were created: a control version (the unmodified whole word) and a silent-center version (in which approximately 62% of the medial vowel was replaced by silence). A group of normal-hearing young adults (19–25 years old) and older adults (61–75 years old) identified these tokens. The older subjects were found to be significantly worse than the younger subjects at identifying the medial vowel and the initial and final consonants in the silent-center condition. These results support the hypothesis of an age-related decrement in the ability to process dynamic perceptual cues in the perception of vowel quality.

Evidence for a solar wind origin of the power law burst lifetime distribution of the AE indices

2000 ◽  
Vol 27 (8) ◽  
pp. 1087-1090 ◽  
Author(s):  
M. P. Freeman
Keyword(s):  
Solar Wind ◽  
Power Law ◽  
Lifetime Distribution ◽  
Solar Wind Origin

Context-independent dynamic information for the perception of coarticulated vowels

1997 ◽  
Author(s):  
James J. Jenkins ◽  
Winifred Strange ◽  
Sonja A. Trent
Keyword(s):  
Dynamic Information

Generation and analysis of biogas from kitchen waste at a small scale

2020 ◽  
pp. 140-148
Author(s):  
Md. Kumail Naqvi ◽  
Mrinal Anthwal ◽  
Ravindra Kumar
Keyword(s):  
Food Waste ◽  
Total Solid ◽  
Small Scale ◽  
Cow Dung ◽  
Retention Period ◽  
Household Level ◽  
Replacement Model ◽  
The Everyday ◽  
Scale Experiment ◽  
Small Period

Biogas is the product of anaerobic vitiation of biodegradable matter. This paper focuses on the need of alternative and green sources of energy at a household level and how biogas produced from the everyday organic waste has the potential and possibility to replace LPG cylinders at houses, shops etc. and empower us to step towards an eco-friendly future. The purpose this small-scale experiment has been to find the perfect input matter that is easy to acquire and which produces the maximum amount of gas from minimum input and within small period of waste retention. Four different types of input waste material containing different quantities of cow dung and kitchen food waste were studied through individual experimental setups. Waste was mixed and kept at room temperature and the pH and total solid concentration of the samples were recorded on regular intervals. From the experiment it was found that the optimum yield of biogas at a small scale, based on the parameters such as retention period, pH and total solid con-centration can be obtained by the use of food waste form households and kitchens. The exact composition has been discussed in this paper. The energy generated by the small-scale generator has also been compared to that of an LPG cylinder and an LPG replacement model has also been presented.

Sub-fixed-time control of a class of nonlinear system with disturbance

2020 ◽  
Author(s):  
Boyan Jiang ◽  
Huanyu Miao ◽  
Xuewu Zhang ◽  
Hua Chen
Keyword(s):  
Nonlinear System ◽  
Fixed Time ◽  
Time Control

Microprocessor Architecture Era for Development Cloud Computing of Ministry of Electricity and Energy of Egypt

2014 ◽  
Vol 13 (12) ◽  
pp. 5199-5209
Author(s):  
Heba A. El-Khobby ◽  
Mostafa M. AbdElnaby ◽  
Abdel-Aziz Ibrahim Mahmoud HASSANIN ◽  
Abdallah D. Maziad
Keyword(s):  
Information Technology ◽  
Cloud Computing ◽  
Theoretical Analysis ◽  
Organization Structure ◽  
Fixed Time ◽  
Organization Structures ◽  
Competence Evaluation ◽  
Competency Based ◽  
Services Evaluation ◽  
The Relationship

A development and evaluation the Cloud Computing (ClComp) of Ministry of Electricity and Energy of Egypt (MEEE) is presented in this paper. In order to be able to judge whether the ClComp of MEEE is competence, there is a need to develop criteria which performance can judged. Competency based standards and the ability to perform the activities within an occupation to the standard expected in the organization structure are presented. The key objective of Cloud Computing is to integrate Authorized Groups (AuthGs) development with the needs of the organization structures of MEEE. The ClComp of MEEE was developed jointly between the telecommunication information technology and ClComp services. Evaluation enables participant to distinguish between AuthGs centered view and a customer centered view of cloud computing of MEEE is competence evaluation. Recognize the main types of evaluation, explain the purpose of evaluation compare the approaches to cloud computing evaluation and review the relationship between the process and policy of evaluation are investigated. Microprocessor architecture presented an optimistic view of multicore scalability to develop the ClComp. Moreover this paper investigates the theoretical analysis of multiprocessor developing and scalability. The analysis was based on the laws of Amdahl's, Gustafson's, Hill's and Marty for fixed-workload condition. Moreover, challenged the difficulties to develop better cloud computing is taken into account. Also, multicore analysis of ClComp scalability, performance and power under fixed-time and memory-bound conditions are studied. These results complement existing studies and demonstrate that ClComp architectures are capable of extensive scalability and developing.

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