A2010-578 exam Dumps Source : Assess: Fundamentals of Applying Tivoli Service Availability/Performance Ma
Test Code : A2010-578
Test denomination : Assess: Fundamentals of Applying Tivoli Service Availability/Performance Ma
Vendor denomination : IBM
: 120 actual Questions
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Harrisburg, NC -- (SBWIRE) -- 01/23/2019 -- world connected HEALTHCARE MARKET size, fame AND FORECAST 2019-2025
The record provides a helpful source of insightful facts for enterprise strategists and aggressive evaluation of connected Healthcare Market. It provides the linked Healthcare industry overview with increase evaluation and futuristic cost, salary and many other features. The research analysts give an complicated description of the expense chain and its distributor evaluation. This linked Healthcare perceive at gives complete information which reinforces the figuring out, scope and utility of this document.
in keeping with the report, global related healthcare market turned into valued at about USD 1,860.26 million in 2017 and is anticipated to generate income of round USD 10,798.45 million with the aid of cease of 2025, growing at a CAGR of round 27.forty seven% between 2018 and 2025.
The file presents the market aggressive landscape and a corresponding designated evaluation of the primary dealer/key avid gamers out there. accurate organizations within the world linked Healthcare Market: Accenture, IBM, SAP, GE Healthcare, Oracle, Microsoft, Airstrip expertise, Medtronic, Allscripts, Boston Scientific, Athenahealth, Cerner, Philips, Agamatrix, Qualcomm, AliveCor and others.
click the hyperlink to fetch a free sample copy of the report:https://www.marketinsightsreports.com/experiences/01181057103/international-related-healthcare-market-dimension-status-and-forecast-2019-2025/inquiry?supply=releasewire&Mode=34
world linked HEALTHCARE MARKET split via PRODUCT class AND functions:
This report segments the world linked Healthcare market on the foundation of types are:TelemedicineHome MonitoringAssisted LivingClinical Monitoring
On the basis of software, the international related Healthcare market is segmented into:analysis and TreatmentMonitoring ApplicationsEducation and AwarenessWellness and PreventionHealthcare ManagementOthers
REGIONAL analysis FOR connected HEALTHCARE MARKET:
For complete knowing of market dynamics, the world related Healthcare market is analyzed across key geographies namely: united states, China, Europe, Japan, South-east Asia, India and others. each and every of those areas is analyzed on groundwork of market findings throughout main countries in these regions for a macro-stage realizing of the market.
have an effect on OF THE connected HEALTHCARE MARKET file:-complete assessment of shameful opportunities and desultory in the linked Healthcare market.- connected Healthcare market fresh improvements and major routine.-precise study of commerce strategies for increase of the linked Healthcare market-leading players.-Conclusive analyze about the increase plot of related Healthcare market for coming near near years.-In-depth knowing of related Healthcare market-specific drivers, constraints and essential micro markets.-favourable impact interior essential technological and market latest trends awesome the connected Healthcare market.
The record has 150 tables and figures browse the report description and TOC:https://www.marketinsightsreports.com/stories/01181057103/world-linked-healthcare-market-measurement-status-and-forecast-2019-2025?source=releasewire&Mode=34
WHAT ARE THE MARKET components which are defined within the file?
-Key Strategic tendencies: The analyze besides contains the key strategic tendencies of the market, comprising R&D, fresh product launch, M&A, agreements, collaborations, partnerships, joint ventures, and regional growth of the main opponents operating available in the market on a global and regional scale.
-Key Market points: The record evaluated key market elements, including revenue, fee, skill, capacity utilization fee, gross, creation, construction rate, consumption, import/export, provide/demand, can charge, market share, CAGR, and shameful margin. furthermore, the perceive at presents a comprehensive analyze of the valuable thing market dynamics and their latest developments, along with pertinent market segments and sub-segments.
-Analytical equipment: The world connected Healthcare Market record comprises the precisely studied and assessed facts of the key trade avid gamers and their scope out there via ability of a number of analytical equipment. The analytical apparatus reminiscent of Porter's five forces analysis, SWOT analysis, feasibility study, and funding recur analysis had been used to investigate the increase of the valuable thing gamers operating out there.
Customization of the file: This file can besides exist custom-made as per your needs for additional data as much as 3 groups or international locations or 40 analyst hours.Please connect with their income group ([email protected]).
ABOUT US:MarketInsightsReports provides syndicated market analysis on industry verticals including Healthcare, suggestions and communique know-how (ICT), technology and Media, chemical compounds, materials, power, heavy industry, etc. MarketInsightsReports provides global and regional market intelligence coverage, a 360-diploma market view which includes statistical forecasts, aggressive landscape, exact segmentation, key developments, and strategic techniques.
CONTACT US: Irfan Tamboli (Head of revenue) - Market Insights ReportsPhone: + 1704 266 3234 | +91-750-707-8687[email protected] | [email protected]
For more tips on this press release talk over with: http://www.sbwire.com/press-releases/linked-healthcare-market-2019-highlights-and-fundamentals-accenture-ibm-sap-ge-healthcare-oracle-microsoft-airstrip-expertise-medtronic-1129108.htm
Irfan TamboliSales HeadMarket Insights ReportsTelephone: 1-704-266-3234Email: click to email Irfan TamboliWeb: https://www.marketinsightsreports.com/
Feb 07, 2019 (Heraldkeeper by passage of COMTEX) -- manhattan, February 07, 2019: The international software administration services Market is expected to exceed more than US$ 32.5 Billion via 2024 at a CAGR of 21% within the given forecast duration.The scope of the report includes an in depth analyze of international and regional markets on software administration functions Market with the reasons given for variations within the growth of the commerce in certain areas.The report covers designated aggressive outlook including the market share and company profiles of the valuable thing members working in the global market. Key players profiled in the file consist of akin to Cognizant (US), Atos (France), Accenture (Republic of eire), Capgemini (France), Fujitsu (Japan),HCL (India), DXC (US), IBM (US), Tech Mahindra (India) and Wipro (India). company profile includes allocate comparable to enterprise summary, financial summary, company strategy and planning, SWOT evaluation and current tendencies.you could Browse full file: https://www.marketresearchengine.com/software-management-capabilities-market
A more associated commercial focus has made overseeing enterprise greater at a loss for words. huge measures of guidance now attainable to the company are each a controversy to convey and an break to searching for. software administration functions potential which assigns the administrations of massive commerce software administration contributed by means of diverse associations to corporations that should outsource their assignment software administration approaches. The associations that soak up the application administration carrying out bear their IT abilities and bear the mastery of comparative application administration for distinctive companies working in a similar locality of business.
The restraining components of world application administration features Market are as follows:
Imbalance or inordinate prices within the application security budget will offset the IT utility budgetApplication management is a time vicious processOrganizations are mainly worried of software statistics securityLot of complications in operational and Architectural implementationThe main riding elements of global application administration capabilities Market are as follows:
predominant section of the software management approach is cloud computingProliferation of cellular Apps exact grotesque cellular App management features and Emergence of Byod.Unexplored possibilities can exist paved by means of open sourced technologyPresence of gigantic number of common functions which tender massive profit opportunitiesTime-To-Market is accelerated because of increasing want for enterprise AgilityThe global utility management services Market has been segmented as below:
The global software administration functions Market is Segmented on the traces of corporation size analysis, provider analysis, vertical analysis and Regional evaluation. by firm measurement analysis this market is segmented on the foundation of diminutive and Medium-Sized enterprises and immense organizations. through service analysis this market is segmented on the basis of application safety, application Integration, software Portfolio evaluation, net utility safety, cellular software protection, application Modernization, Cloud utility Migration, utility Replat forming, UI Modernization, utility Managed features and software upkeep and help.
via vertical analysis this market is segmented on the groundwork of executive, Retail and eCommerce, Banking, financial functions, and coverage (BFSI), Telecom and IT, Manufacturing, Healthcare and Lifesciences, power and Utilities and Others (go back and forth and Hospitality, education, and Transport and Logistics, Media and leisure). by Regional analysis this market is segmented on the groundwork of North the us, Europe, Asia-Pacific and relaxation of the world.
This record gives:
1) a top even view of the global marketplace for application management features Market and related applied sciences.2) Analyses of international market trends, with facts from 2015, estimates for 2016 and 2017, and projections of compound annual boom rates (CAGRs) via 2024.3) Identifications of recent market opportunities and centered promotional plans for utility administration services Market.4) discussion of research and construction, and the exact for brand spanking fresh items and fresh applications.5) comprehensive enterprise profiles of main avid gamers in the business.
Request sample file from here:https://www.marketresearchengine.com/utility-administration-capabilities-market
desk of Contents:
1 Introduction2 Market analysis tactics
3 Market abstract
4 pleasant Market Insights
5 software administration features Market Overview
6 Regulatory Market Synopsis7 software management features Market, with the aid of Service8 application management capabilities Market, by means of company Size9 utility administration features Market, through Vertical
10 application administration functions Market, by passage of Geographic Region11 aggressive Landscape12 enterprise Profiles(enterprise Overview, Product Portfolio, fiscal Overview, Key Devolopements)*12.1 Accenture12.2 ATOS12.three Capgemini12.four Cognizant12.5 Fujitsu12.6 DXC12.7 HCL12.8 IBM12.9 Tech Mahindra12.10 Wipro
different connected Market analysis studies:
Case management Market is meant to attain US$ 7.0 Billion by passage of 2023
supplier possibility management Market is expected to fetch US$ 6 Billion by using 2023
enterprise identify: Market analysis Engine
Contact adult: John Bay
country: united states
web site: https://www.marketresearchengine.com/
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Urban transportation systems are vulnerable to congestion, accidents, weather, special events, and other costly delays. Whereas typical policy responses prioritize reduction of delays under typical conditions to improve the efficiency of urban road systems, analytic back for investments that improve resilience (defined as system recovery from additional disruptions) is noiseless scarce. In this effort, they represent paved roads as a transportation network by mapping intersections to nodes and road segments between the intersections to links. They built road networks for 40 of the urban areas defined by the U.S. Census Bureau. They developed and calibrated a model to evaluate traffic delays using link loads. The loads may exist regarded as traffic-based centrality measures, estimating the number of individuals using corresponding road segments. Efficiency was estimated as the objective annual detain per peak-period auto commuter, and modeled results were institute to exist proximate to observed data, with the notable exception of fresh York City. Resilience was estimated as the change in efficiency resulting from roadway disruptions and was institute to vary between cities, with increased delays due to a 5% random loss of road linkages ranging from 9.5% in Los Angeles to 56.0% in San Francisco. The results demonstrate that many urban road systems that operate inefficiently under typical conditions are nevertheless resilient to disruption, whereas some more efficient cities are more fragile. The implication is that resilience, not just efficiency, should exist considered explicitly in roadway project selection and justify investment opportunities related to calamity and other disruptions.INTRODUCTION
Existing roadway design standards emphasize the efficient movement of vehicles through a transportation network (1–4). Efficiency in this context may embrace identification of the shortest or fastest route (1, 5–7), or the route that minimizes congestion (8). It is the primary criterion on which road networks are modeled and design alternatives are considered (6, 7, 9, 10). The Texas A&M Transportation Institute defines and reports traffic detain in urban areas as the annual detain per auto commuter (11). Other studies define efficiency as detain for the individual driver in terms of time spent moving or stopped (7), or matter travel time between shameful origin-destination pairs in the network (9). However, as the sustain of any motorist in great American cities can attest, conditions beyond the scope of the roadway design, including congestion, accidents, nefarious weather, construction, and special events (for example, a marathon race), can occasions costly delays and frustrating inefficiencies that result in fuel waste, infrastructure deterioration, and increased pollution (12, 13). Evaluating road networks based only on efficiency under typical operating conditions results in Little to no information about how the system performs under suboptimal or disrupted conditions.
Infrastructure systems that exhibit adaptive response to stress are typically characterized as resilient (14–21). Given the essential role of transportation in emergency response, provision of essential services, and economic well-being, the resilience of roadway networks has received increasing policy attention. Nonetheless, scholars bear yet to converge on a shared understanding of resilience suitable to usher design, operation, and reconstruction of roadway networks. Although resilience in infrastructure systems is characterized as a multidimensional concept (22, 23), in many engineering and civil infrastructure implementations, resilience is defined as the ability of a system to prepare for, absorb, recoup from, and reconcile to disturbances (16). Specific to transportation, resilience has been defined as “the ability of the system to maintain its demonstrated even of service or to restore itself to that even of service in a specified timeframe” (24). Others portray transportation resilience as simply the ability of a system to minimize operational loss (25) or employ the term synonymously with robustness, redundancy, reliability, or vulnerability (26–28).
Current efforts in transportation resilience research bear focused on framework progress and quantification methods. These efforts embrace the specification of resilience indicators, such as total traffic detain (24), economic loss (29), post-disaster maximum flux (30), and autonomous system components (31). Practical concerns with this type of resilience evaluation are that it relies on uncertain performance data and often omits indicators that are unquantifiable (19). Other resilience approaches apply traffic network modeling to identify locations for captious buildings (for example, hospitals and fire stations) (32), minimize trip distance for individual passengers (33), and minimize travel time across the system (12). One drawback of existing network resilience methods is that they are data-intensive, often requiring limited information about resources for unusual road system repair (26, 28) or network behavior following a disruptive event (34). Moreover, existing resilience quantification approaches lack calibration and testing across a compass of transportation systems. Because many disruptive events, and their associated consequences, are difficult to predict, resilient road systems must exist characterized and evaluated by the capacity to reconcile to a variety of different stress scenarios. Partly because of these obstacles, joint consideration of efficiency and resilience has yet to exist implemented for transportation networks.
Here, they study the interconnections between resilience and efficiency (20) among road transportation networks in 40 major U.S. cities. They develop an urban roadway efficiency model, calibrate it on the basis of the observed data (11) of annual detain per peak-period auto commuter, and apply the model to reckon efficiency in 40 cities. Then, they model traffic response to random roadway disruptions and recalculate expected delays to determine the sensitivity of each city to loss of roadway linkages. The results may betray valuable considerations for assessing proposals for improvement of roadway infrastructure that maintain efficiency under stress conditions.METHODS
The Methods section appears here to aid clarify the subsequent sections. To develop the urban roadway efficiency model, they defined the urban locality boundaries, constructed the road networks, and evaluated the population density within cities using the Census Bureau data sets (35, 36) and OpenStreetMap (OSM) data sets (37). They relied on these data to assess commuter patterns, which they used to measure efficiency and resilience of road networks.
Alternative approaches to transportation bear been offered and embrace those based on percolation theory and cascading failures (38–40), human mobility pattern studies (41–43), queueing (44, 45), and the employ of historical data to predict traffic. They review these approaches in the Supplementary Materials and note that the main capitalize of their model is that it relies solely on readily available public data, rather than on particular data sets that may or may not exist practical to obtain for any particular region. The model’s algorithmic simplicity allows us to consider spatial topologies of cities in lofty resolution including tens of thousands of nodes and links. They did not create a more accurate transportation model than the existing ones, but they were able to obtain measurable characteristics of transportation systems (average delays) using their model.Geospatial boundaries and population density
To define geospatial boundaries for the transportation infrastructure networks, they used the U.S. Census Bureau geospatial data set (35) for urban areas—densely developed residential, commercial, and other nonresidential areas (46). They approximated the exact urban locality polygon with a simplified manually drawn one (Fig. 1A) and included shameful roadways within 40 km (25 miles) of it in the network. For each of the links, they calculated its length on the basis of the polyline defining the link and assigned a number of lanes m and the FFSs (see the Supplementary Materials).Fig. 1 Definition of urban areas and assignment of nodes’ population.
(A) Boston, MA-NH-RI urban locality as defined by the U.S. Census Bureau shapefiles (gray background). To simplify the model and the algorithms calculating the distance from network nodes to the city boundary, they approximate each of the urban areas shapefiles with a vulgar manually drawn polygon (pink outline). (B) Assignment of the number of people departing from each of the network nodes. Population distribution (color polygons; red corresponds to higher population density), Voronoi polygons (black outline), and network nodes (dots) in Downtown Boston.
We next estimated population in vicinity of each intersection i using the Census Tract data (36). To this end, they split the map into Voronoi cells centered at intersections and then evaluated the population of each cell Ni as
Above, Nt is the population of Census Tract t, and Pi and Pt are the polygons of the cell and the tract, respectively (Fig. 1B and table S2).Transportation model
We built on the gravity model to generate commuting patterns. The gravity model (47) is a classical model for trip distribution assignment and is extensively adopted in most metropolitan planning and statewide travel exact models in the United States (48–51). Other trip distribution models include, for example, destination preference models (52, 53). However, these models are not as widely used in great scale, because the particular data required by these models are frequently unavailable (48).
We assumed that (i) the flux of commuters from source region o to destination region d is proportional to the population at the destination Nd and that (ii) the flux of commuters depends on the distance xod between the source and destination and is given by a distance factor, P(xod). Using these assumptions, they assessed the fraction of individuals commuting from region o to destination region d, fod, as
Then, the commuter flux from source region o to destination region d is
Although individual driving habits may vary (54), they assumed that shameful drivers tended to optimize their commute paths such that their travel time was minimized. This assumption allowed us to reckon commute paths for every origin-destination pair using inferred FFSs. To reckon commuter flows between shameful pairs of intersections, they estimated distances xod as the distance of the shortest time path from o to d. Furthermore, in locality of the distance factor P(xod), they used the distribution of trip lengths from the U.S. Federal Highway Administration National Household Travel Survey (55, 56), which they approximated with the exponential role (Fig. 2A and table S3).Fig. 2 Model details.
(A) Distance factor P(xod) (Eq. 2) of trips given the distance between nodes (solid line) and the statistical data (bars). (B) Dependency of hurry on density for V = 100 km/hour.
Next, they defined the commuter load on each road segment as
(4)where θod(ij) is a binary variable equal to 0 when the link ij is not on the shortest path connecting nodes o and d, and 1 otherwise. Note that in Eq. 4, they only considered origins that were not farther than 30 km from the urban locality boundary polygon. The nodes farther than 30 km from the boundary were only used as destinations to evaluate the fraction of commuters not going toward the urban locality (Eq. 2).
Because most commuters travel during peak periods, commuter loads Lij can exist regarded as traffic-based centrality measures estimating the number of individuals using corresponding road segments. Then, the cumulative time lost by shameful commuters is
(5)where Vij and vij are, respectively, the FFS and the actual traffic hurry along the ij road segment, lij is its length, l0 is the length correction due to traffic signals, and β is the proportionality coefficient selfsame for shameful urban areas. The summation in Eq. 5 includes only links, whose origins and destinations are within the boundary polygon. A similar equation was obtained for the moving detain in the study of Jiang and Adeli (45), where the authors looked at the detain induced from road repairs.
The actual traffic hurry vij depends on many factors including the hurry limit, the number of drivers on the road, and road conditions. Although there exist a number of approaches to assay actual traffic hurry (57, 58), they chose to employ the Daganzo model (59) to derive the traffic speed, as shown in the Supplementary Materials
(6)where vmin is the minimum hurry in the traffic, vveh is the correction for the finite size of the car, and α is the proportionality coefficient (Fig. 2B). Efficiency and resilience metrics
We measured efficiency as the objective annual detain per peak-period auto commuter. In practice, lower detain means higher efficiency. There are multiple ways to map from delays to efficiency, such as taking the inverse values of delays, taking negative values of delays, etc. To avoid ambiguity and facilitate the interpretation of results, they used the delays themselves to quantify the transportation efficiency of urban areas.
We operationalized resilience through the change in traffic delays relative to stress, which is modeled as loss or impairment of roadway linkages. Looking at resilience from the network science perspective, they focused on topological features of cities, rather than on recovery resources available. Sterbenz et al. (60) evaluated a network’s resilience as a compass of operational conditions for which it stays in the acceptable service region and highlighted that remediation mechanisms drive the operational situation toward improvement. They are studying how availability of alternate routes helps remediate the consequences of the initial disruption to the network. In the traffic context, the immediate impact of a given physical disruption (and the time for it to unfold) in terms of closing lanes or reducing hurry limits on affected roads will not vary much from network to network, although the number and type of these disruptions will. Likewise, the hurry of restoring full functionality (through action in the physical domain) is not so much relative on the road network as it is on the nature of the disruption (snow versus earthquake versus flood) and the resources that the city allocates to such repair. The even of functionality that these repairs achieve ought to exist the full predisruption functionality, that is, eventually shameful roads can exist fully cleared or restored. However, the immediate loss of role for a given traffic flux can very quickly exist partially recovered after a disruption by action in the information domain, namely, rerouting of traffic. From the fresh even situation at that even of functionality, full functionality is gradually restored. Thus, their model proxies for resilience and is calibrated against the data that proxy for efficiency. At the selfsame time, they note that to fully capture resilience characteristics of a transportation system, it is required to analyze recovery resources available and the effectiveness of coordination between the germane authorities. Lower additional detain corresponds to higher resilience, but using the selfsame reasoning that they had for efficiency, they quantified resilience through additional delays.RESULTS Efficiency
Together, their traffic model has three parameters (proportionality coefficient α, minimum hurry vmin, and finite vehicle size correction vveh) and is summarized in Eqs. 5 and 6. Given parameter values of the model, one can assay the total detain incurred by shameful commuters in any given suburban locality or, equivalently, the objective detain per commuter. They pilfer vveh = 9 km/hour and vmin = 5 km/hour and calibrate the model to determine the value of α to match the actual data on the annual objective detain per peak-period auto commuter provided by the Urban Mobility Scorecard (11).
We divide the 40 urban areas into two equally sized groups for model calibration and validation, respectively. They bear institute that for the 20 urban areas used for calibration, the R-squared coefficient took values in the compass (−0.01 to 0.83) (Fig. 3 and Supplementary Materials). This allows us to set model parameters α and β (see Methods) as follows: α = 4.30 × 104 hour−1 and β = 10.59. These values correspond to the Pearson coefficient of 0.91 (P = 2.17 × 10−8).Fig. 3 Modeled and observed delays in 40 urban areas.
Pearson correlation coefficients and P values between observed and modeled delays are (0.91, 2.17 × 10−8) for the 20 cities used to calibrate the model and (0.63, 3.00 × 10−3) for the 20 cities used to validate the model. Observed delays were taken from the Texas A&M Transportation Institute Urban Mobility Scorecard (11).
To validate the model, they assay travel delays in 20 different urban areas. As seen from Fig. 3, the estimated travel delays are significantly correlated (R = 0.63, P = 3.00 × 10−3) with actual detain times (11), validating the transportation model. motif 4 is a Google Maps representation of actual and modeled results for Los Angeles and San Francisco. Road conditions under real, objective traffic patterns at 8 a.m. provided by Google Maps are in Fig. 4 (A and D). Modeled conditions are given for comparison in Fig. 4 (B and E). Finally, Fig. 4 (C and F) shows the new, modeled traffic patterns that result from redistribution of travel in response to a disruption of 5% of the links.Fig. 4 Traffic distributions.
Typical congestion at 8 a.m. for Los Angeles (top) and San Francisco (bottom) as given by Google Maps (A and D), modeled with no disruptions (B and E), and modeled with a 5% link disruption (C and F). Notably, in Los Angeles, the disruption results in traffic redistribution to smaller roads, whereas in San Francisco, it results in increased congestion along the major highways.Resilience
Our approach to model stress is inspired by percolation theory. For every independent simulation of stress, they select a finite fraction of affected road segments r at random, with the probability of failure proportional to segment length. They collect statistics for 20 realizations of the percolation. On failed segments, free-flow speeds (FFSs) are reduced to 1 km/hour (representing near-total loss), and loads L and traffic delays are then recalculated using the updated FFSs. Low-stress scenarios (r < 0.1) might exist caused by accidents or construction. Larger disruptions might occur during power failures that disrupt traffic signals or stern flooding that makes many roadways nearly impassable. Finally, widespread stress might exist caused by snow, ice, or dust storms that impress nearly the entire roadway system. motif 5 displays the analysis of detain times in six representative urban areas for the full spectrum of adverse event severities, r ⋲ [0; 1]. In addition, fig. S5 shows the results for shameful urban areas. Some routes within a lone urban locality sustain longer delays than others. The inset of Fig. 5 shows the detain distribution for both Los Angeles, which is narrowly clustered, and Boston, where greater variability between roadways is evident. Traffic detain times grow rapidly as r increases and attain saturation (all routes moving at 1 km/hour) as r approaches 1. They determine the most resilient urban transportation network to exist Salt Lake City, UT, whereas the least resilient among the 40 metropolitans is shown to exist Washington, DC.Fig. 5 Dependency of the additional detain on the severity of the links disruption for six representative urban areas.
Error bars expose matter values ± SD. The inset shows distribution densities for two selected urban areas for 1000 realizations of 5% disruption. Note that San Francisco’s unique topology makes it susceptible to failures of a diminutive number of discrete roadways, and this produces an anomalous impact at 5 to 15% disruption.
Figure 6 shows both the efficiency (in blue) and resilience response (additional delays due to 5% link disruption, in orange) for the 40 urban areas modeled. Some cities with lofty efficiency under typical operating conditions (that is, low delays) nevertheless exhibit low resilience (that is, a acute increase in traffic delays) under stress. Virginia Beach, VA; Providence, RI; and Jacksonville, FL shameful drop into this category of urban areas in which traffic operates well under ordinary circumstances but rapidly become snarled under mild stress. On the other hand, Los Angeles is notorious for traffic delays under shameful conditions—yet minor stress levels result in Little degradation of efficiency. By contrast, typical traffic delays in San Francisco are comparable to Los Angeles, but mild stress in San Francisco results in great increases in additional delays. These examples indicate that resilience (that is, additional detain response to stress) is independent of typical operating efficiency.Fig. 6 Comparison of resilience and efficiency metrics.
Annual impact of 5% disruption (additional delay) has a low correlation with typical annual detain per peak-period auto commuter (delay). Pearson R = 0.49, P = 1.18 × 10−3.DISCUSSION
The disturbances affecting the road infrastructure are often complex, and their impact on the structure and role of roadway systems may exist unknown (28, 31). These disturbances might exist natural and irregular, such as distributed road closures caused by an earthquake or homogeneous vehicle slowing down because of a snowstorm. The disturbances might besides exist anthropogenic and intentional, such as a street honest or marathon race. Whatever the disturbance, the results of this analysis allow several meaningful inferences to exist made that may bear valuable implications for highway transportation policy. The first is that resilience and efficiency represent different aspects related to the nature of transportation systems; they are not correlated and should exist considered jointly as complementary characteristics of roadway networks.
Second, there are characteristic differences in the resilience of different urban areas, and these differences are persistent at mild, medium, or widespread levels of stress (Fig. 5). Except for San Francisco, CA, which is the most breakable of shameful cities represented in Fig. 5 at stress levels r < 20% but then surpassed by Boston, MA and Washington, DC, the rank ordering of urban locality resilience is insensitive to stress levels. That is, cities that exhibit relatively low resilience under mild stress are the selfsame cities that exhibit low levels of resilience (relative to peers) under widespread roadway impairment. This suggests that the characteristics that impart resilience (such as availability or alternate routes through redundancy of links) are protective against both the intermittent outages caused by occasional car crashes and those caused by snow and ice storms. For cities without resilience, a widespread hazard such as snow may lead to a cascade of conditions (for example, crashes) that rapidly deteriorate into gridlock. This was exactly the case for Washington, DC 20 January 2016 under only 2.5 × 10−2 m or 2.5 cm of snow (61), and for Atlanta, GA 2 years earlier, which experienced 5.1 × 10−2 m or 5.1 cm of snow in the middle of the day that resulted in traffic jams that took days to disentangle (62). Whereas current explanations of these traffic catastrophes focus on the failure of roadway managers to prepare plows and emergency response equipment, Fig. 5 suggests that cities with similar climates (Memphis, TN and Richmond, VA) are less likely to exist affected, regardless of the availability of plow or sand trucks.
The third inference follows from Fig. 6, which suggests that urban areas that effect capital investments to reduce traffic delays under typical operating conditions may nevertheless exist vulnerable to traffic delays under mild stress conditions. Because these stressors are inevitable, whether from crashes, construction, special events, extreme weather, apparatus malfunctions, or even deliberate attack, investment strategies that prioritize reduction of typical operating delays may bear the unintended consequence of exacerbating tail risks—that is, the risk of worse catastrophe under unlikely but possible conditions.
Finally, the exceptional position of fresh York City in Fig. 3 calls attention to the fact that substitutes for roadway transportation are available in many cities and bear an valuable role to play in relieving traffic congestion. According to the Texas A&M Institute (63, 64), public transit reduces delays per peak-period auto commuter in the fresh York urban locality by 63 hours, in Chicago by 23 hours, and by less than 20 hours in other urban areas. Because their model considers only roadway transit, and fresh York City contains a myriad of nonroad-based options to avoid roadway congestion, it is unlikely that their model can provide informative results for the fresh York urban area.
Although interest has increased in policies that enhance roadway resilience, few analytic tools are available to usher fresh investments in achieving resilience goals. It is widely understood that roadway infrastructure is expensive, both in acquiring land for rights-of-way and in construction of improvements, and thus, decisions regarding alignment, crossing, and access made over a age of decades may bear long-lasting consequences that are observable in traffic data today. Consequently, urban areas exhibit different unintentional traffic characteristics, including delays under typical and random stress conditions. Investments motivated exclusively by expected efficiencies under typical operating conditions are unreliable safeguards against loss of efficiency under stress conditions. Therefore, fresh analytic tools are required that allow designers to assess the adaptive capacity of roadway infrastructure and assess the potential of fresh investments to provide enhanced resilience. The adaptive network-based model described herein is one such approach.SUPPLEMENTARY MATERIALS
Supplementary material for this article is available at http://advances.sciencemag.org/cgi/content/full/3/12/e1701079/DC1
Alternative approaches to model transportation
Mapping from OSM Foundation shapefiles to network nodes and links
Population assignment algorithm
Distance factor of the likelihood of travel between nodes
Estimation of the traffic hurry from the density of vehicles
Model calibration procedure
Sensitivity of the model to ramp speeds
Additional detain as a role of the severity of link disruption
table S1. Mapping original OSM types to network link types and assignment of the number of lanes.
table S2. The algorithm of the node population assignment.
table S3. Distance factor P(xod) of the likelihood of travel between nodes.
table S4. Model sensitivity to ramp hurry coefficient.
fig. S1. Effects of the removal of nodes of degree 2.
fig. S2. Density-flow relationship in the Daganzo traffic model.
fig. S3. Model calibration.
fig. S4. Modeled delays for ramp hurry coefficients of 1/3 and 1/2.
fig. S5. Dependency of the additional detain on the severity of the link disruption for shameful 40 urban areas.
This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant employ is not for commercial handicap and provided the original drudgery is properly cited.REFERENCES AND NOTES
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Transaction-consistent database recoveries minimize the database admin's involvement in recoveries. To create points in the CDP journal that are identifiable as recoverable transaction-consistent database images, CDP products tender application-specific host agents for databases. The CDP host agent monitors the database for periods when it enters a transaction-consistent situation and then inserts a bookmark into the CDP journal. When performing recoveries, the CDP software identifies and displays these bookmarks so admins can restore images that are immediately accessible.
To create a consistency group, an admin selects and aggregates the virtual CDP LUNs that mirror the LUNs on which the production database resides. Each consistency group has its own journal that tracks data changes to any of the LUNs belonging to that consistency group. A captious factor is placing the CDP consistency group journal on back-end disk that matches or exceeds the performance of production LUNs.
Critical to Siemens' implementation was the creation and configuration of three CDP consistency groups to back the database consistent across more than 200 RecoverPoint CDP LUNs. Siemens' Knoerer matched his 200 production database LUNs with virtual RecoverPoint LUNs residing on EMC Clariion CX700 disk.
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