scholarly journals Study on allocation and realization method of helicopter vulnerability index

2021 ◽  
Vol 39 (3) ◽  
pp. 593-603
Author(s):  
Peng Hou ◽  
Yang Pei ◽  
Junqiang Ai ◽  
Chen Tian ◽  
Guangran Zu ◽  
...  
Keyword(s):  
Vulnerability Assessment ◽  
Vulnerability Index ◽  
Vulnerability Reduction ◽  
Allocation Method ◽  
System Components ◽  
Iterative Analysis ◽  
Critical Components ◽  
Allocation Methods ◽  
Assessment Results

To reduce the vulnerability of attack helicopters under fragment/projectile strikes, the method of assigning vulnerability index from the whole aircraft to critical components under single and multiple attacks is mainly studied. Under a single strike, the system components in the same direction are divided into three situations: no component overlap, nonredundant model with component overlap and redundant model with component overlap. Two index allocation methods based on the ratio of the presented area of the critical components and the ratio of the vulnerability assessment results of the critical components are proposed. The system components are divided into redundant components and non-redundant components, and an index allocation method based on the proportion of critical components' vulnerability results is proposed under multiple strikes. On this basis, combining with the vulnerability reduction measures of attack helicopters, the vulnerability index requirements of corresponding components are achieved through iterative analysis. Finally, the AH-64D helicopter is subjected to simulation tests under single and multiple strikes, and the vulnerability indexes of B-level and C-level are assigned, which verified the feasibility of the method.

scholarly journals Local Scale Groundwater Vulnerability Assessment Using GIS-Based DRASTIC Model, Emphasis on Groundwater Quality

2021 ◽  
Author(s):  
Yongxiang Zhang ◽  
Ruitao Jia ◽  
Jin Wu ◽  
Huaqing Wang ◽  
Zhuoran Luo
Keyword(s):  
Groundwater Quality ◽  
Vulnerability Assessment ◽  
Groundwater Vulnerability ◽  
Vulnerability Index ◽  
Total Hardness ◽  
Drastic Model ◽  
Hydrogeological Parameters ◽  
Groundwater Vulnerability Assessment ◽  
And Control ◽  
Assessment Results

Groundwater vulnerability assessment is a basic work for groundwater exploitation and protection. The Chaoyang district of Beijing was selected and investigated in this study. Groundwater vulnerability index system in Chaoyang district was constructed based on hydrogeological settings of local region, the human influence and the DRASTIC model. The comprehensive vulnerability assessment was carried out with weights of 0.4 and 0.6 for the intrinsic vulnerability and the specific vulnerability, respectively. In this study, total 9 hydrogeological parameters were considered, and the diagram of groundwater vulnerability assessment results in Chaoyang District was obtained by using DRASTIC index and overlay weighted method. The groundwater quality is poor in the southwest of Chaoyang District. The correlation analysis between total hardness, total dissolved solids and vulnerability results was carried out, and the correlation results were 06 and 0.7, respectively. The area with high groundwater vulnerability is also the regions with serious groundwater pollution, indicating that the assessment results are objective and reasonable, which can provide prevention and control of groundwater reference for the management department in the future, so as to reduce the risk of pollution.

scholarly journals Urban Vulnerability Assessment for Pandemic Surveillance—The COVID-19 Case in Bogotá, Colombia

2021 ◽  
Vol 13 (6) ◽  
pp. 3402
Author(s):  
Jeisson Prieto ◽  
Rafael Malagón ◽  
Jonatan Gomez ◽  
Elizabeth León
Keyword(s):  
Vulnerability Assessment ◽  
Disease Transmission ◽  
Urban Areas ◽  
A Priori ◽  
Vulnerability Index ◽  
Past Century ◽  
Vulnerability Factors ◽  
Early Assessment ◽  
Global Citizens ◽  
Urban Vulnerability

A pandemic devastates the lives of global citizens and causes significant economic, social, and political disruption. Evidence suggests that the likelihood of pandemics has increased over the past century because of increased global travel and integration, urbanization, and changes in land use with a profound affectation of society–nature metabolism. Further, evidence concerning the urban character of the pandemic has underlined the role of cities in disease transmission. An early assessment of the severity of infection and transmissibility can help quantify the pandemic potential and prioritize surveillance to control highly vulnerable urban areas in pandemics. In this paper, an Urban Vulnerability Assessment (UVA) methodology is proposed. UVA investigates various vulnerability factors related to pandemics to assess the vulnerability in urban areas. A vulnerability index is constructed by the aggregation of multiple vulnerability factors computed on each urban area (i.e., urban density, poverty index, informal labor, transmission routes). This methodology is useful in a-priori evaluation and development of policies and programs aimed at reducing disaster risk (DRR) at different scales (i.e., addressing urban vulnerability at national, regional, and provincial scales), under diverse scenarios of resources scarcity (i.e., short and long-term actions), and for different audiences (i.e., the general public, policy-makers, international organizations). The applicability of UVA is shown by the identification of high vulnerable areas based on publicly available data where surveillance should be prioritized in the COVID-19 pandemic in Bogotá, Colombia.

scholarly journals Groundwater vulnerability assessment to pollution in Kasihan, Bantul Regency: A comparative method study (GOD, SINTACS and DRASTIC)

2020 ◽  
Vol 200 ◽  
pp. 02012
Author(s):  
Ignasius Loyola Setyawan Purnama ◽  
Vincentia Anindha Primacintya
Keyword(s):  
Groundwater Level ◽  
Vulnerability Assessment ◽  
Rock Type ◽  
Comparative Method ◽  
Groundwater Vulnerability ◽  
Vulnerability Index ◽  
Vulnerability Assessments ◽  
Drastic Method ◽  
Groundwater Vulnerability Assessment ◽  
Aquifer Type

Groundwater vulnerability to pollution refers to the ease with which pollutants reach groundwater, in other words indicating the level of ease of an area to experience pollution. At present, the theme is one of the themes that attracts many researchers because pollution is more frequent in an area. The purpose of this study is to assess groundwater vulnerability in the study area for pollution using the GOD method and conduct a study of 3 groundwater vulnerability assessments, to determine the most appropriate assessment to be applied in the study area. The method used to determine groundwater vulnerability to pollution is GOD, which uses three parameters to assess the vulnerability of groundwater, namely aquifer type, rock type above aquifer and groundwater level. Furthermore, the results of the vulnerability assessment using the GOD method are compared with the vulnerability assessment according to the SINTACS and DRASTIC methods that have been carried out before in this area. The results showed that the variation of groundwater vulnerability index values in the study area according to the GOD method was from 0.35 to 0.63. Locations that are classified as medium vulnerability are generally located in the limestone Sentolo Formation, while locations that are classified as high vulnerability class are located in the volcanic rock of Yogyakarta Formation. Noting the results of determining groundwater vulnerability from the three methods, it can be said that the three methods are suitable for assessing groundwater vulnerability in the study area. However, looking at the distribution pattern of the level of pollution, the DRASTIC method can provide more detailed results related to the level of vulnerability.

Research on the Assessment of Disaster-Carrying Bodies’ Comprehensive Vulnerability on Variable Fuzzy Clustering

2014 ◽  
Vol 998-999 ◽  
pp. 1227-1230
Author(s):  
Jing Wang ◽  
Dong Ming Wang
Keyword(s):  
Data Processing ◽  
Fuzzy Clustering ◽  
Vulnerability Assessment ◽  
Index System ◽  
Vulnerability Index ◽  
Index Model ◽  
Disaster Vulnerability ◽  
Urban Disaster ◽  
Risk Research ◽  
The Index System

The disaster-carrying bodies’ comprehensive vulnerability is a key to the risk research of urban disaster. Vulnerability is a comprehensive attribute of the hazard-carrying bodies and is affected deeply by society, economic and environment. The index system of the vulnerability assessment is worked out with the method of variable fuzzy clustering. The comprehensive vulnerability index model is structured, and the comprehensive vulnerability is calculated in the following example. Comparative to the existing research, variable fuzzy clustering and comprehensive vulnerability index model are more objective in data processing and the influence of the clustering categories is reduced.

Vacation Homes and Residential Interest Deductions: An Outdated Statute and Conflicting Interpretations Create Confusion (and Planning Opportunities)

2004 ◽  
Vol 2 (1) ◽  
pp. 61-74
Author(s):  
John O. Everett ◽  
William A. Duncan ◽  
Wendy Peffley
Keyword(s):  
Tax Planning ◽  
Second Home ◽  
Tax Effects ◽  
Allocation Method ◽  
Rental Property ◽  
Tax Benefits ◽  
Tax Court ◽  
The U.S ◽  
Allocation Methods

Tax benefits have been the key in making vacation homes affordable for many taxpayers. In some cases these benefits have been augmented by an inconsistency in allocation methods used to determine allowable expenses for vacation homes under Section 280A. The U.S. Tax Court created this inconsistency years ago with its decision in Bolton, 77 TC 104 (1981), where the Court approved an allocation method that was contrary to IRS guidance. Although most analyses since this decision have focused on how the Bolton decision permits a taxpayer to increase total deductions related to a rental property when the Section 280A limits apply, there is another aspect to the allocation controversy that has not received as much attention. Specifically, the possible loss of the personal deduction for residential interest when the property does not qualify as a second home may create unexpected tax consequences, where the best tax-planning advice may be to encourage the taxpayer to use the vacation home for more personal days. This article provides a brief review of the basic Sec. 280A rules for vacation rental homes and closely examines the tax effects of conflicting statutory, administrative, and judicial guidance on the treatment of interest and taxes related to such a property. As demonstrated by three scenarios, the inconsistent treatments may provide an opportunity for owners of vacation homes to “game” the system for maximum tax benefit near the end of a tax year. As a consequence of Congress's failure to update Sec. 280A following the 1986 changes on interest deductions, such gaming of the system may be accomplished without confronting change of accounting method issues.

Groundwater Vulnerability Mapping in Urbanized Hydrological System Using Modified Drastic Model and Sensitivity Analysis

2018 ◽  
Vol 24 (3) ◽  
pp. 293-304 ◽  
Author(s):  
Ismail Chenini ◽  
Adel Zghibi ◽  
Mohamed Haythem Msaddek ◽  
Mahmoud Dlala
Keyword(s):  
Land Use ◽  
Vadose Zone ◽  
Vulnerability Assessment ◽  
Groundwater Vulnerability ◽  
Vulnerability Index ◽  
Drastic Model ◽  
Groundwater Vulnerability Mapping ◽  
Groundwater Vulnerability Assessment ◽  
Modified Drastic ◽  
The Impact

Abstract The groundwater vulnerability assessment is normally applied to rural watersheds. However, urbanization modifies the hydrogeological processes. A modified DRASTIC model was adopted to establish a groundwater vulnerability map in an urbanized watershed. The modified DRASTIC model incorporated a land-use map, and net recharge was calculated taking into account the specificity of the urban hydrogeological system. The application of the proposed approach to the Mannouba watershed demonstrates that the groundwater vulnerability indexes range from 80 to 165. The study's results shows that 30 percent of the Mannouba watershed area has a high vulnerability index, 45 percent of the area has a medium index, and 25 percent of the study area has a low vulnerability index. To specify the effect of each DRASTIC factor on the calculated vulnerability index, sensitivity analyses were performed. Land use, topography, and soil media have an important theoretical weight greater than the effective weight. The impact of the vadose zone factor has the most important effective weight and affects the vulnerability index. The sensitivity assessment explored the variation in vulnerability after thematic layer removal. In this analysis, the removal of hydraulic conductivity and impact of vadose zone modified the vulnerability index. Groundwater vulnerability assessment in urbanized watersheds is difficult and has to consider the impact of urbanization in the hydrogeological parameters.

scholarly journals Assessing The Vulnerability Index Of Covid-19 Pandemic In India

2021 ◽  
Vol 14 (4) ◽  
pp. 131-139 ◽  
Author(s):  
Netrananda Sahu ◽  
Martand Mani Mishra
Keyword(s):  
Adaptive Capacity ◽  
Vulnerability Assessment ◽  
Vulnerability Index ◽  
Secondary Source ◽  
Practical Application ◽  
The Government ◽  
Index Calculation

The coronavirus (COVID-19) outbreak has created havoc all across the States and Union Territories (UTs) of India since its beginning on 30th January 2020. As of 1st January 2021, India has recorded 10,305,788 cases and 149,218 deaths from this deadly pandemic. It has been observed through the data; across states and UTs, the trend and pattern of this disease are not similar at all. There are many reasons for these dissimilarities which are categorized into indicators to assess the vulnerability in this study. We have examined vulnerabilities in 28 states and 8 UTs of India. Livelihood Vulnerability Index (LVI) has been applied with certain modifications to calculate the Vulnerability Index (VI). The figure resulting from the vulnerability assessment corresponds that the factors involved in the three-section exposure, sensitivity, and adaptive capacity had a significant impact on deciding the vulnerability of the population. The result identified the states and UTs which are more vulnerable and need more attention from the government and policymakers. The proposed method of study is unique in its sense as vulnerability index calculation is purely based on a secondary source of data and therefore has an expectation of a higher degree of practical application.

scholarly journals Socio-Ecological Vulnerability Assessment and the Resulting in Spatial Pattern: A Case Study of Semarang City

2020 ◽  
Vol 5 (3) ◽  
Author(s):  
Visilya Faniza ◽  
Wisnu Pradoto
Keyword(s):  
Spatial Pattern ◽  
Spatial Data ◽  
Vulnerability Assessment ◽  
Vulnerability Index ◽  
Assessment Method ◽  
Ecological Systems ◽  
Data Availability ◽  
Future Research ◽  
Ecological Vulnerability

The aim of this paper is to examine the socio-ecological vulnerability and the resulting in spatial pattern on a city scale. The assessment methods for vulnerability-resilience in the social and ecological have been broadly examined, such as the Environmental Vulnerability Index (EVI) and disaster risk assessment by the BNPB (Badan Penanggulangan Bencana Nasional). However, in some cases, these methods are suitable only in disastrous vulnerability and on a larger scale. The assessment method of socio-ecological systems in this paper has been modified to a city-scale and per the data availability. By using spatial data, this paper analyses the connection between vulnerability-resilience of socio-ecological systems and land coverage pattern. Based on the case study, the finding shows that almost 28% of Semarang city areas are socio-ecologically vulnerable. Mostof the land use of the vulnerable areas is currently used for urban built-up area and agriculture. For future research, this method can be used for vulnerability assessment of the socio-ecological system in other cities and as a consideration for decision making in spatial planning.

scholarly journals Social Vulnerability Assessment for Flood Risk Analysis

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 558 ◽  
Author(s):  
Laura Tascón-González ◽  
Montserrat Ferrer-Julià ◽  
Maurici Ruiz ◽  
Eduardo García-Meléndez
Keyword(s):  
Vulnerability Assessment ◽  
Flood Risk ◽  
Social Vulnerability ◽  
Large Scale ◽  
Vulnerability Index ◽  
Social Vulnerability Index ◽  
Coping Capacity ◽  
High Exposure ◽  
Public Data ◽  
Social Vulnerability Assessment

This paper proposes a methodology for the analysis of social vulnerability to floods based on the integration and weighting of a range of exposure and resistance (coping capacity) indicators. It focuses on the selection and characteristics of each proposed indicator and the integration procedure based on the analytic hierarchy process (AHP) on a large scale. The majority of data used for the calculation of the indicators comes from open public data sources, which allows the replicability of the method in any area where the same data are available. To demonstrate the feasibility of the method, a study case is presented. The flood social vulnerability assessment focuses on the municipality of Ponferrada (Spain), a medium-sized town that has high exposure to floods due to potential breakage of the dam located upstream. A detailed mapping of the social vulnerability index is generated at the urban parcel scale, which shows an affected population of 34,941 inhabitants. The capability of working with such detailed units of analysis for an entire medium-sized town provides a valuable tool to support flood risk planning and management.

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