Modeling Software Patch Management Based on Vulnerabilities Discovered

2019 ◽  
Vol 27 (02) ◽  
pp. 2040003 ◽  
Author(s):  
Adarsh Anand ◽  
Navneet Bhatt ◽  
Deepti Aggrawal
Keyword(s):  
Real Life ◽  
Integrative Approach ◽  
Software System ◽  
System A ◽  
Novel Approach ◽  
Time Period ◽  
Modeling Software ◽  
Vulnerability Discovery ◽  
The Stability ◽  
The Impact

A software system deals with various security implications after its release in the market. Correspondingly, firm releases security patches to counter those flaws discovered in the software system. A vendor releases a patch only if a vulnerability has been discovered in a software. It is an important aspect that encompasses the prediction of potential number of patches to be released to maintain the stability of a software. Vulnerability Discovery Models (VDMs) help a software vendor to acknowledge the security trends, forecast security investments and to plan patches, but very few attempts have been made to model the Vulnerability Patch Modeling (VPM) based on the impact of vulnerabilities discovered over the time period. In this proposal, we deduce a novel approach that addresses trend in the sequential development of patches based on the vendor or reporters fetching out the vulnerabilities in a software. The vulnerability trends in a software significantly affect the discovery process and later trigger a patch deployment to suppress the possible likelihood of a breach. The integrative approach underlines the association of vulnerability patch modeling with the vulnerability discovery phenomenon. To exemplify the proposed systematic structure, a statistical analysis has been conducted using real life vulnerability and patch datasets.

The Impact of Return Orifices on the Stability of a Four-Way Valve–Controlled Double-Acting Actuator

2013 ◽  
Vol 135 (4) ◽  
Author(s):  
Shusen Zhang
Keyword(s):  
Nonlinear System ◽  
Nonlinear Model ◽  
Stability Boundary ◽  
Stable Limit ◽  
Limit Circle ◽  
Spring Rate ◽  
Valve Spring ◽  
System A ◽  
The Stability ◽  
The Impact

This paper studies the influence of the return and the valve spring rate on the stability of a four-way valve–controlled double-acting actuator. A fully nonlinear model for this system is developed based on the orifice equation. The new model contains both the upstream chamber and downstream chamber for each orifice. The geometry of the return orifice and the valve spring rate has an impact on the stability boundary of the four-way valve–controlled double-acting actuator. A larger return orifice requires using a stronger valve spring to ensure the stability of the system. It is shown that, for the nonlinear system, a stable limit circle can be born from an unstable origin as bifurcation occurs.

scholarly journals The development of simulation model on environmental uncertainty factors for interval project completion

2018 ◽  
Vol 7 (2.29) ◽  
pp. 62
Author(s):  
Zirawani Baharum ◽  
Yuvendra Rao Venkatesan ◽  
Syazwa Nabila Mohd Raidzuan ◽  
Muhammad Imran Qureshi
Keyword(s):  
Time Management ◽  
Environmental Uncertainty ◽  
Monte Carlo Analysis ◽  
Software System ◽  
Uncertainty Factors ◽  
Project Completion ◽  
System A ◽  
Time Extension ◽  
Underlying Causes ◽  
The Impact

The construction industry has many underlying causes of uncertainty that has impact on late delivery of project completion's performance as well as in time management. The issue on uncertainty delays directly impact the project performance that leads into unnecessary time extension. The objective of the research is the way to create a valid model towards the environmental uncertainty factors. Therefore, this research is conducted to identify the impact of environmental issues which affect the period of project completion using the Witness software system. A literature review revealed the types of other uncertainty factors that affect the project completion by using other software’s such as Monte Carlo analysis and relative important index. This research is intended to measure the impact of each environmental factor using the Witness software system by evaluating their significant level of each. The significant level of the factors was determined by using the SPSS statistics software tools. The model will help to manage the time and costing factors by reducing the main impact from the environment. This will aid all project contractors in managing their resources and time utilities. 

An Investigation of an Impact Vibration Absorber

1967 ◽  
Vol 89 (4) ◽  
pp. 653-657 ◽  
Author(s):  
D. M. Egle
Keyword(s):  
Approximate Expression ◽  
Small Mass ◽  
Vibration Absorber ◽  
Primary System ◽  
Maximum Displacement ◽  
State Response ◽  
System A ◽  
The Stability ◽  
The Impact ◽  
Impact Vibration

The impact vibration absorber consists of a small mass, moving unidirectionally, impacting against the ends of a container which is rigidly attached to the primary vibrating system. A simplified theory for the forced steady-state response of a linear, single-degree-of-freedom system with an impact vibration absorber is presented. The assumption of two impacts per cycle at equal time intervals is known to lead to two possible solutions near the resonant frequency of the primary system. A criterion for determining the stability of the solutions is developed. An approximate expression for the maximum displacement of the primary system is given and the theory is compared to experimental results.

The ‘Mouth to Nose Merging System’: A novel approach to study the impact of odour on other sensory perceptions

2013 ◽  
Vol 28 (1) ◽  
pp. 264-270 ◽  
Author(s):  
Mathilde Charles ◽  
Pauline Poinot ◽  
Florence Texier ◽  
Gaëlle Arvisenet ◽  
Evelyne Vigneau ◽  
...  
Keyword(s):  
System A ◽  
Novel Approach ◽  
The Impact

Rethinking Physiologic Stability: Touch and Intracranial Pressure

1999 ◽  
Vol 1 (1) ◽  
pp. 12-19 ◽  
Author(s):  
Pamela H. Mitchell ◽  
Barbara Habermann
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Intracranial Pressure ◽  
Parental Care ◽  
Intracranial Hypertension ◽  
Pediatric Intensive Care Unit ◽  
Pediatric Intensive Care ◽  
Time Period ◽  
The Stability ◽  
The Impact

The purpose of this research was to examine the contingent nature of physiologic stability with respect to the impact of nursing and parental care touch on intracranial pressure (ICP) in children. Data were reanalyzed from those previously collected in eight children in a pediatric intensive care unit who had intracranial hypertension from a variety of causes and whose ICP was invasively monitored. One hundred forty-nine clusters of spontaneous touch/talking were available for analysis after those occurring close in time to procedures and drugs affecting ICP were dropped. Twenty-three episodes of investigator touch (without talking) were also analyzed. ICP stability was defined as any tracing over a defined time period in which the peak-to-trough amplitude did not exceed twice the calculated resting variability. Such an approach allowed classification and counting of stable versus unstable baselines, and stable versus unstable responses to touch. Therefore, ICP stability was examined by comparing the stability of the ICP tracing the last minute prior to a cluster of nonprocedural touch (baseline) with the first minute after the cluster. Clusters of spontaneous touch were nearly always associated with talking to the child and rarely were followed by change in level of ICP greater than that child’s ICP variability at rest. Investigator stroking without talking never was followed by a significant change in level of ICP. There was a contingent relationship between stability of the ICP tracing prior to a cluster of touching/talking such that the probability of ICP becoming more stable when the touch/talk occurred on an unstable baseline was twice that of touch/talk occurring on an stable baseline.

scholarly journals The Impact of Tilt Angle and Flowrate on Performance of Nanofluid Based Photovoltaic/ Thermal (PV/T) Solar Collectors

2020 ◽  
Author(s):  
Aliasghar Naderi ◽  
Heshmatollah Gazori ◽  
Mahan Bozegi
Keyword(s):  
Tilt Angle ◽  
Solar Collector ◽  
Electrical Energy ◽  
Working Fluid ◽  
Solar Collectors ◽  
Step Method ◽  
Novel Approach ◽  
The Stability ◽  
The Impact ◽  
Global Population

Abstract Background Today, by the arrival of new sustainable energy technology, the provision of energy for the global population has turned into a significant issue for societies. Meanwhile, photovoltaic/thermal (PV/T) solar collectors, as one of the most advanced types to produce electricity and heat simultaneously, can be applied with nanofluid as the working fluid. Methods In this research, PVP coated silver nanofluid was prepared in three volume concentrations being 250, 500 and 1000 ppm by two-step method to determine the stability and thermal conductivity, experimentally. Then, the performance of PV/T solar collector is analyzed by TRNSYS software to study electrical and thermal efficiency and also output electrical and thermal energy in different months, flowrates (25, 50, 75, 100, 150 and 200 l/h) and nanofluid’s concentration. Results Based on the results, the optimum flowrate and nanofluid’s concentration are obtained 50 l/h and 1000 ppm PVP coated silver nanofluid. At last, the effect of tilt angle on the output thermal and electrical energy is determined. According to the results, by changing tilt angle in different months, the performance of PV/T solar collector can be ameliorated. Conclusion This paper can be heeded as a novel approach to overcome the lack of solar radiation in winters by improving the performance of PV/T solar collectors.

Research Progress in the Stability of Organic-Inorganic Hybrid Perovskite Solar Cells

2020 ◽  
Vol 980 ◽  
pp. 97-106
Author(s):  
Hao Xiang Duan
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Real Life ◽  
Research Progress ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
The Stability ◽  
A Site ◽  
The Impact

Organic-inorganic hybrid perovskite solar cells (PSCs) has attracted growing attention in recent years due to its outstanding photovoltaic performance. After extensive studies in material designs and device engineering, the efficiencies of PSCs have been improved to 24.2%. On the other hand, the inadequate stability of PSCs is hindering the application to real life. Starting with the stability of organic-inorganic PSCs, this article analyzed and concluded the impact of doping A-site and X-site ions on the stability of perovskite respectively. Next, it put forward the prospects for possible development directions of this field in the future.

Lobster in a bottle: a novel technique for observing the predation of juvenile spiny lobster (Jasus edwardsii)

2016 ◽  
Vol 67 (11) ◽  
pp. 1625 ◽  
Author(s):  
Jan Hesse ◽  
Jenni A. Stanley ◽  
Andrew G. Jeffs
Keyword(s):  
Spiny Lobster ◽  
Video Recording ◽  
Infrared Light ◽  
Night Time ◽  
Novel Approach ◽  
Time Period ◽  
Jasus Edwardsii ◽  
Long Time ◽  
Conger Eel ◽  
The Impact

Determining the impact of predators on juvenile spiny lobsters living on reefs is important for understanding recruitment processes that ultimately help determine the size of economically important lobster populations. The present study describes a novel approach for observing attempted predation on live juvenile spiny lobster (Jasus edwardsii) in situ, by presenting the lobster in a transparent container that was lit with infrared light to enable continuous monitoring, even at night, by video recording. This technique can be used to provide valuable information on overall relative predation pressure from comparative locations and habitats, as well as identify potential predators, their mode of predation, and the timing of their of predation activity. For example, predation attempts on juvenile J. edwardsii by the spotted wrasse (Notolabrus celidotus) were recorded only from 0500 to 1400 hours (daytime) and from 1900 to 2100 hours (dusk), whereas the activity by the northern conger eel (Conger wilsoni) was observed only for the period between 2100 and 0200 hours (nocturnal). This method of assessing predation of juvenile lobsters provides considerable advantages over previously used tethering methods, by allowing continuous observations over a long time period (≥24h), including night time, while also eliminating experimental mortality of juvenile lobsters.

scholarly journals About accidents cyclicality and mathematical model of failure rate in main electrical grids of power systems

2019 ◽  
Vol 139 ◽  
pp. 01043
Author(s):  
Irek Galiaskarov ◽  
Misrikhan Misrihkanov ◽  
Vladimir Ryabchenko
Keyword(s):  
Power Systems ◽  
Dynamic System ◽  
Failure Rate ◽  
Failure Frequency ◽  
Electrical Grids ◽  
Time Period ◽  
The Stability ◽  
The Impact ◽  
Extended Time Period ◽  
Socio Economic Factors

The accidents cyclicality of 500 kVoverhead lines of a large region over an extended time period was studied. Significant fluctuations in the values of their failure rate (failure frequency) under the impact of natural and socio-economic factors are revealed. The wavelet spectrums of the failure frequency were constructed, which revealed several historical periods of accidences. It is proposed to consider the failure rate as the output signal of a dynamic system with many difficultly formalized inputs. The stability of this dynamic system is evaluated. The ways of formalizing a multidimensional dynamic model of accidence in main electrical grids of power systems are outlined.

Sign in / Sign up

Export Citation Format

Share Document