scholarly journals MODELLING OF AGING OF THREADS AND FIBRES WITH COMPUTER SIMULATION METHODS

2019 ◽  
pp. 36-39
Author(s):  
P. A. Sevost'yanov
Keyword(s):  
Statistical Simulation ◽  
Software Implementation ◽  
Simulation Methods ◽  
Fibrous Materials ◽  
Aging Effects ◽  
Factors Affecting ◽  
One Dimensional ◽  
Short Period ◽  
Stationary Conditions ◽  
Probabilistic Nature

The article proposes an algorithm for computer statistical simulation of the formation and development of areas of defects and aging in one-dimensional fibrous materials of arbitrary finite length. The software implementation of the algorithm in the Matlab environment allowed to obtain a visual picture of the aging regions propagation dynamics, taking into account the probabilistic nature of the occurrence and propagation of defects. The model combines factors affecting the location of defect sources along the threads and fibres length, the violation intensity of the fibrous material properties in the defective areas, and the speed of its propagation along the threads and fibres length. The developed model allows to study the influence of numerous factors on the aging effects dynamics in one-dimensional materials, to rank the degree of their influence, to determine the area of efforts for the aging processes study in full-scale experiments. An example is given for realisations of defects along the length of the sample for stationary and non-stationary conditions of the thread aging, when within a short period of time the thread was subjected to intense exposure, which contributed to the acceleration of aging and destruction.

Spoilage of Fish in the Vessels at Sea: 2. Treatment on the Deck and in the Hold

1956 ◽  
Vol 13 (1) ◽  
pp. 21-39 ◽  
Author(s):  
C. H. Castell ◽  
W. A. MacCallum ◽  
H. E. Power
Keyword(s):  
Storage Period ◽  
Factors Affecting ◽  
Short Period ◽  
Warm Summer ◽  
Subsequent Storage ◽  
Initial Contamination

A study has been made of some of the factors affecting the spoilage rate of fish in the trawlers at sea. It was found that two conditions were major causes of accelerated spoilage: (1) Treatments that resulted in very heavy initial contamination such as storing the fish directly against the slimy wooden pen boards, and (2) Treatments that resulted in a rise in the temperature of the fish. This latter may be a larger increase in temperature for a short period, such as exposure of the fish on the deck during warm summer weather, or a smaller increase over a longer period, such as results from inadequate or inefficient icing.Other types of carelessness and unsanitary conditions did not have any significant effect on the fish until at least 6 or 7 days, as long as they were well iced during the subsequent storage period in the hold.

Factors Affecting Gelation of Lidocaine Hydrochloride-Loaded Polyelectrolyte Complex Thermosensitivity Gel for Dry Socket Treatment

2021 ◽  
Vol 901 ◽  
pp. 111-116
Author(s):  
Nuttawut Supachawaroj ◽  
Sucharat Limsitthichaikoon
Keyword(s):  
Polyelectrolyte Complex ◽  
Gelation Time ◽  
Lidocaine Hydrochloride ◽  
Gelation Temperature ◽  
High Concentration ◽  
Preparation Methods ◽  
Factors Affecting ◽  
Dry Socket ◽  
Short Period ◽  
Gel Preparation

Dry socket disease, a pocket wound caused by the tooth extraction that resulted in severe acute pain which requires a topical analgesic with rapidly pain reduction and suppress the pain until the wound healed. This study aimed to investigate factors affecting gelation temperature and gelation time of lidocaine hydrochloride (LH)-loaded polyelectrolyte complex (PEC) thermosensitivity gel for treating dry socket wound. The first factor was investigated the effects of the ratio of three different types of polymers as chitosan (CS), hyaluronic acid (HA) and poloxamer407 (P407) on the phase transition caused by temperature. The second factor was examined the effects of gel preparation methods. The results showed that increasing concentration of the cationic polymer as CS induced the separation of the solution to gel (sol-to-gel) system due to the charge of CS and the charge of PEC. The ratio of HA:P407 affected the gel forming which high concentration of P407 reduced the gelation temperature while low concentration of HA disturbed the sol-to-gel state causing coagulation. The viscosity, spreadability, and swelling were significantly increased due to the concomitant increased in each polymer, HA and P407. The particle of the formulation observed under microscope was found to be less than 1 µm. Phase inversion from sol-to-gel was found after a min at 23°C. Since gelation temperature of the purposed formula is supposed to form gel below 37°C within a short period of injection. The results of the study indicate the suitable sol-to-gel forming in the appropriate temperature and time which should be used for further investigation in the efficacy and safety.

Discrete-Time Memristor Model for Enhancing Chaotic Complexity and Application in Secure Communication

2022 ◽  
Author(s):  
Wenhao Yan ◽  
Zijing Jiang ◽  
Qun Ding
Keyword(s):  
Fixed Points ◽  
Discrete Time ◽  
Dynamic Characteristics ◽  
Secure Communication ◽  
Chaotic Systems ◽  
Two Dimensional ◽  
Initial State ◽  
One Dimensional ◽  
Backward Euler ◽  
Short Period

Abstract The physical implementation of continuoustime memristor makes it widely used in chaotic circuits, whereas discrete-time memristor has not received much attention. In this paper, the backward-Euler method is used to discretize TiO2 memristor model, and the discretized model also meets the three fingerprinter characteristics of the generalized memristor. The short period phenomenon and uneven output distribution of one-dimensional chaotic systems affect their applications in some fields, so it is necessary to improve the dynamic characteristics of one-dimensional chaotic systems. In this paper, a two-dimensional discrete-time memristor model is obtained by linear coupling the proposed TiO2 memristor model and one-dimensional chaotic systems. Since the two-dimensional model has infinite fixed points, the stability of these fixed points depends on the coupling parameters and the initial state of the discrete TiO2 memristor model. Furthermore, the dynamic characteristics of one-dimensional chaotic systems can be enhanced by the proposed method. Finally, we apply the generated chaotic sequence to secure communication.

Factors affecting the phenology of the first brood of the sugar-cane froghopper Aeneolamia varia saccharina (Dist.) (Homoptera, Cercopidae) in Trinidad

1975 ◽  
Vol 65 (3) ◽  
pp. 359-372 ◽  
Author(s):  
A. B. S. King
Keyword(s):  
Adult Emergence ◽  
Dry Season ◽  
Soil Conditions ◽  
Factors Affecting ◽  
Expected Time ◽  
Short Period ◽  
Incubation Periods ◽  
Close Relationship ◽  
Dry Soil ◽  
Predictive Relationship

AbstractThe size and occurrence of the first brood of adults of Aeneolamia varia saccharina (Dist.) are examined in relation to the pattern of egg eclosion and rainfall. The proportion of eggs hatching within a month of oviposition in the laboratory (short-period eggs) decreased from over 90% in August to less than 20% in January, but the incubation periods of the remaining, long-period eggs were longest in those laid during October and November. The overall hatching distributions tended to be bimodal with most eggs hatching during the early months of the year under moist conditions at 26°C. Dry soil conditions delay eclosion, and eggs obtained from fields during the dry season and then incubated under moist conditions tended to hatch at the normally expected time of the first rains in May. The numbers of eggs expected to produce the first brood, computed from laboratory hatching data and estimates of the numbers and fecundities of froghoppers during the second, third and fourth broods, were less than the actual numbers sampled just before the first rains. There was a close relationship between the first rainfall of over one inch within 48 h and adult emergence 27 and 34 days later, and 85% of field egg populations in May had hatched and/or died by the week after the first rains. However some variation in the date of their occurrence accounted for non-synchrony of first broods over the region. The numbers of diapause eggs in fields sampled during the dry season failed to give a good predictive relationship with first brood adult populations, probably because of density dependent mortality of eggs or hatchling nymphs.

scholarly journals Sparse, iterative simulation methods for one-dimensional laminar flames

2019 ◽  
Vol 204 ◽  
pp. 23-32 ◽  
Author(s):  
Simon Lapointe ◽  
Russell A. Whitesides ◽  
Matthew J. McNenly
Keyword(s):  
Laminar Flames ◽  
Simulation Methods ◽  
One Dimensional

scholarly journals A review of fibrous materials for soft body armour applications

RSC Advances ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 1066-1086 ◽  
Author(s):  
Unsanhame Mawkhlieng ◽  
Abhijit Majumdar ◽  
Animesh Laha
Keyword(s):  
Critical Review ◽  
Impact Resistance ◽  
Fibrous Materials ◽  
Soft Body ◽  
Factors Affecting ◽  
Body Armour ◽  
The Impact

A critical review on the factors affecting the impact resistance and various approaches adopted to enhance the performance of soft body armour materials is presented here.

A Combined Discrete Event, Agent - Based Approach to Modeling the Tensile Strength of One - Dimensional Fibrous Materials

2014 ◽  
Vol 9 (4) ◽  
pp. 155892501400900 ◽  
Author(s):  
Arkady Cherkassky ◽  
Eugene Bumagin
Keyword(s):  
Tensile Strength ◽  
Discrete Event ◽  
Fibrous Materials ◽  
New Approach ◽  
Agent Based ◽  
One Dimensional ◽  
Agent Based Modelling ◽  
Event Simulation ◽  
Slippage Effect ◽  
Basic Parameters

This paper presents a new approach to predict the tensile strength of one-dimensional fibrous materials. The approach combines discrete-event simulation of the fiber flow with agent-based modelling of the fiber slippage. The ability of the elaborated model of the fiber flow to track every fiber separately enables the calculation and analysis of all contacts and forces between the fibers, and the prediction of the material's tensile strength. The model is based on the phenomenon of the strength associated with the fiber slippage effect. Algorithms for modeling the cross-section and the segment tensile strength are developed. Implementation of this algorithm and the study of the behavior of the elaborated model by varying the basic parameters will be described in the Part 2 of the article.

scholarly journals How Do Millennial Managers Lead Older Employees? The Philippine Workplace Experience

SAGE Open ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 215824402091465
Author(s):  
Arneil G. Gabriel ◽  
Gloria M. Alcantara ◽  
Josephina D. G. Alvarez
Keyword(s):  
Leadership Styles ◽  
Participant Observation ◽  
The Philippines ◽  
Factors Affecting ◽  
Leadership Attributes ◽  
Older Employees ◽  
Global Workforce ◽  
Workplace Experience ◽  
Short Period ◽  
And Performance

As millennial workers enter and dominate the global workforce by 2025, understanding their leadership styles is vital to bring about higher level of performance and productivity in the workplace. The Millennials, the next generation of leaders, are entering the workforce and assuming leadership positions in a relatively short period. More often, they found themselves leading employees that are older than themselves and yet their leadership traits and styles are not fully understood. The study explores factors affecting leadership styles of millennial managers and how they are manifested and applied in managing and resolving conflict involving older subordinates. Using a qualitative approach, it employs interviews, participant observation, and prolonged engagement with four millennial managers from the National Food Authority in the Philippines as they lead, manage, and interact with their older staff. Data collected were triangulated by document analysis and interview of the millennial managers’ subordinates themselves. The results of the study show that the participants’ leadership competencies are in the early stages of development. The participants consider building good impression and rapport highlighting the importance of soft skills in leadership, strong sense of respect, reverse mentoring, delegation of tasks, and the ability to handle expectations and performance as factors in managing older employees. This study draws the attention to examining the leadership attributes and potentials of Filipino millennial managers in the context of Philippine workplace culture using insights from Public Administration, Social Sciences, and Psychology.

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