Página 1 dos resultados de 96 itens digitais encontrados em 0.002 segundos

Combate, prevenção e otimização das perdas comerciais de energia elétrica.; Combat, prevention and optimization of non technical losses of electric power distribution.

Penin, Carlos Alexandre de Sousa
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 28/04/2008 Português
Relevância na Pesquisa
38.010186%
As perdas de energia elétrica devidas a furtos e fraudes, também chamadas de Perdas Não-Técnicas (PNT) ou Perdas Comerciais, têm sido matéria prioritária das empresas concessionárias de distribuição de energia elétrica, bem como dos órgãos reguladores, tanto pelo seu crescimento nos últimos anos quanto pelo seu impacto no sistema elétrico brasileiro. As formas de fraude são as mais variadas possíveis, o que gera enormes dificuldades para as concessionárias. Este trabalho tem como objetivo o estudo do problema das PNT utilizando-se de uma abordagem multidisciplinar, que analisa a experiência tanto de concessionárias no Brasil como no exterior. O trabalho discute as melhores práticas para mitigação das mesmas e propõe melhorias nos processos de combate e de prevenção, e nos procedimentos legais para recuperação de receitas, apoiados sobre uma cuidadosa contextualização regulatória. Chamase a atenção para a diversidade sócio-econômica nacional, compara-se com diversos exemplos internacionais, e propõe-se identificar os aspectos mais relevantes a serem considerados na regulação sobre o tema, discutindo procedimentos e metodologias para o equacionamento do montante de recursos a serem aplicados pelas companhias distribuidoras para a adequada redução dessas perdas de energia. Observa-se que grande parte das PNT tem origem em questões de cunho social. O Estado pode e deve estabelecer políticas para resolver tais questões...

Discussão de uma metodologia para diagnóstico e ações para redução de perdas de água: aplicação no sistema de abastecimento de água da Região Metropolitana de São Paulo.; Discussion of a methodology for diagnosis and actions to reduce water losses: application in the water supply system in metropolitan region of Sao Paulo.

Melato, Débora Soares
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 01/04/2010 Português
Relevância na Pesquisa
37.729897%
O presente trabalho apresenta uma discussão de metodologia para o diagnóstico e ações para redução de perdas de água, auxiliando na determinação do perfil das perdas, permitindo uma melhor priorização das ações de combate e redução de perdas reais (físicas) e perdas aparentes (comerciais). Para o desenvolvimento desta metodologia, foi realizada uma ampla revisão bibliográfica, onde é apresentada a conceituação geral sobre perdas de água, suas causas e ocorrências, indicadores, ações para redução, e uma abordagem detalhada quanto às metodologias existentes para avaliação de perdas e ferramentas disponíveis para isto. A metodologia aqui aplicada desenvolve a avaliação das perdas através do balanço hídrico, utilizando o software gratuito desenvolvido pelo Banco Mundial (W-B Easy Calc - v1.17), e foi aplicada no sistema de abastecimento de água da Região Metropolitana de São Paulo (RMSP). Foram levantados os dados básicos de controle do sistema e realizados ensaios de campo, com medições de pressão e ensaios para determinação das perdas aparentes. Como estudo de caso, a metodologia foi aplicada em três setores de abastecimento da área central da RMSP, com características distintas. Os resultados do diagnóstico das perdas foram coerentes com as expectativas. Em função dos resultados...

Avaliação do controle de perdas físicas em redes de distribuição de água da região metropolitana de São Paulo; Evaluation of control physical losses in water distribution networks in the metropolitan region of São Paulo

Aldo Roberto Silva Diniz
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 03/09/2012 Português
Relevância na Pesquisa
28.053813%
O presente trabalho apresenta uma avaliação de um método para o controle de perdas físicas de água, caracterizando-as, de maneira a priorizar as ações de combate e redução de perdas físicas. Para o desenvolvimento do trabalho, foi realizada uma ampla revisão bibliográfica, em que é apresentada a conceituação geral sobre perdas de água, suas causas e ocorrências, indicadores, ações para redução, e uma abordagem detalhada quanto aos métodos existentes para avaliação de perdas e as ferramentas disponíveis. O método de avaliação para o controle das perdas físicas baseia-se no balanço hídrico, utilizando o software gratuito desenvolvido pela AWWA (American Water Works Association, Water Audit 4.0) e foi aplicada no estudo de caso do sistema de abastecimento de água da Região Metropolitana de São Paulo (RMSP), denominado setor Casa Verde. Foram levantados os dados de controle do sistema e realizados os ensaios de campo, com medições de pressão para determinação do local dos vazamentos não visíveis, auxiliando na sua caracterização e permitindo a priorização das ações de combate às perdas físicas. Os resultados do diagnóstico da localização das perdas foram analisados, desenvolvendo-se uma estratégia para a redução de perdas físicas.; This paper presents an evaluation method for the control of physical losses of water...

Fighting while Parasitized: Can Nematode Infections Affect the Outcome of Staged Combat in Beetles?

Vasquez, David; Willoughby, Anna; Davis, Andrew K.
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 01/04/2015 Português
Relevância na Pesquisa
26.856055%
The effects of non-lethal parasites may be felt most strongly when hosts engage in intense, energy-demanding behaviors. One such behavior is fighting with conspecifics, which is common among territorial animals, including many beetle species. We examined the effects of parasites on the fighting ability of a saproxylic beetle, the horned passalus (Odontotaenius disjunctus, Family: Passalidae), which is host to a non-lethal nematode, Chondronema passali. We pitted pairs of randomly-chosen (but equally-weighted) beetles against each other in a small arena and determined the winner and aggression level of fights. Then we examined beetles for the presence, and severity of nematode infections. There was a non-significant tendency (p = 0.065) for the frequency of wins, losses and draws to differ between beetles with and without C. passali; non-parasitized individuals (n = 104) won 47% of their fights while those with the parasite (n = 88) won 34%, a 13% difference in wins. The number of nematodes in a beetle affected the outcome of fights between infected and uninfected individuals in an unexpected fashion: fighting ability was lowest in beetles with the lowest (p = 0.033), not highest (p = 0.266), nematode burdens. Within-fight aggression was highest when both beetles were uninfected and lowest when both were infected (p = 0.034). Collectively...

Evaluating the role of vaccine to combat peste des petits ruminants outbreaks in endemic disease situation

Abubakar, Muhammad; Manzoor, Shumaila; Ali, Qurban
Fonte: BioMed Central Publicador: BioMed Central
Tipo: Artigo de Revista Científica
Publicado em 20/01/2015 Português
Relevância na Pesquisa
26.856055%
Among the main intimidation to the sheep and goat population, PPR outbreaks are causing huge losses especially in endemic areas. During recent times, six outbreaks of PPR were confirmed at semi-organized goat farms/herds in various regions of Punjab province and Islamabad capital territory (ICT), Pakistan. The disease started after introduction of new animals at these farms with no history of previous PPR vaccination. The clinical signs appeared affecting respiratory and enteric systems and spread quickly. Disease caused mortality of 10-20% and morbidity of 20-40% within a time period of four weeks. Morbidity and mortality rates were 30.38% (86/283) and 15.55% (44/283), respectively. Three treatment regimes were executed to demonstrate the role of vaccination during outbreak at these farms. First was to use only the broad spectrum antibiotics (Penicillin & Streptomycin and/ or Trimethoprim and Sulfadiazine) at two farms (Texilla and Attock). Second treatment regime was to use the same broad spectrum antibiotic along with extensive fluid therapy (Farms at ICT-1 and ICT-2). The third regime was to use of broad spectrum antibiotic plus fluid therapy along with vaccinating the herd against PPR during first week of outbreak (ICT-3 and ICT-4). The third scheme of treatment gave the better results as there was no mortality in third week post-outbreak. Therefore...

Development of a cost effective organizational model for the shipbuilding welder labor workforce

Stegelman, Michael S.
Fonte: Monterey, California: Naval Postgraduate School Publicador: Monterey, California: Naval Postgraduate School
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
26.856055%
Approved for public release, distribution unlimited; For the past twenty-five years, the United States shipbuilding industry has experienced a slow decay in both hiring and retaining critical skilled professionals. One of the most critical skills required to fabricate a ship is welding, as welders play a major role in shipbuilding, from pre-fabrication to delivery. Many factors can be identified with the cause of this reduction in the welder workforce. These factors include technology enhancement, outsourcing, growth of optional career opportunities, and family pressure. The latter factor is identified as playing a role in reducing initial accessions within the Department of Defense. Military recruiters have been required to alter their tried and true recruitment strategies. Parents, who do not wish to see their children subjected to the violence of war or to serve within, what they perceive, as a low return on investment career, are pushing their children away from military service in favor of continued education or careers in the private sector. This phenomenon is not unlike the pressures that potential welders receive from their own families. Shipbuilding is a demanding profession, requiring a level of mental and physical toughness not necessarily found in most manufacturing industries. Under the best conditions...

Carrier air wing tactics : incorporating the Navy Unmanned Combat Air System (NUCAS)

Gill, Travis J.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
27.43012%
The United States Navy has established a Program Office for Acquisition, PMA-268, to develop the Navy Unmanned Combat Air System (NUCAS). The NUCAS will be a fighter-sized aircraft capable of a variety of missions including deep-strike, Intelligence Surveillance and Reconnaissance (ISR), Time Sensitive Targeting (TST) and Air-to-Air Refueling (AAR).The NUCAS will offer new capabilities to the operability of a Carrier Air Wing (CAW). Potential benefits include improvements in combat sortie completion rate for manned aircraft such as the F/A-18 Super Hornet and the F-35C Lighting II Joint Strike Fighter (JSF). In this thesis, we evaluate a strike scenario that focuses on the coordination of the NUCAS, the F/A-18 Super Hornet,and the F-35C Lightning II. We construct a simulation model of the scenario, and use a designed experiment to run 12,000 simulated coordinated strike events. We then use a variety of statistical and graphical tools to evaluate the result in order to determine the quantity of aircraft required for mission success, and operational factors necessary to limit friendly aircraft losses. The results indicate that a division of four NUCAS aircraft is advantageous, in terms of achieved high target casualty rates and high blue survivability rates. The results also highlight the necessity of stealth technology requirements in future aircraft development.

Improving the Goodness-of-Fits Associated with the Current and Proposed Combat Active Replacement Factors (CARF) Methodology

Solano, Mario L.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
27.43012%
The U.S. Marine Corps developed the Combat Active Replacement Factor (CARF) methodology as a way to obtain reliable logistics planning factors to aid in the estimation of equipment losses in future conflicts. The continuous evaluation and validation of these types of methodologies is considered of critical importance, since its effects directly impact combat effectiveness, supply chain management, logistics, acquisitions, and overall budgeting. This thesis analyzes a proposed methodology for use in calculating Explicitly Calculated CARFs (ECCs), making use of real-world Master Data Repository (MDR) data from previous low- and medium-intensity conflicts. As well, this thesis analyzes proposed regression models used in calculating Federal Supply Code (FSC) and Federal Supply Group (FSG) CARFs. We employ bootstrapping techniques in order to analyze the sensitivity of ECCs and find that as many of 70% may exhibit extreme sensitivity to reasonable changes in usage data. We employ Ordinary Least Squares regression models to estimate CARFs by FSC and FSG and obtain dramatically more CARFs relative to the draft methodology. Finally, a cross validation of a sample of the regression models reveals that CARFs generated from such models tend to vary substantially from their actual values.

Tailorable Remote Unmanned Combat Craft

Jacobi, Loren; Campbell, Rick; Chau, Chee Nam; Ong, Chin Chuan; Tan, Szu Hau; Cher, Hock Hin; Alexander, Cory; Edwards, Christien; Diukman, Anner; Ding, Sze Yi; Hagstette, Matthew; Kwek, Howe Leng; Bush, Adam; Meeks, Matt; Tham, Kine Yin; Ng, Mei Ling; Ye
Fonte: Monterey, California : Naval Postgraduate School Publicador: Monterey, California : Naval Postgraduate School
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
27.551558%
CAPSTONE PROJECT REPORT; Systems Engineering Analysis Cohort 18, Team B; U.S. military and civilian vessels are critically vulnerable to asymmetric threats in littoral environments. Common asymmetric weapons such as Anti-Ship Cruise Missiles (ASCM), Low Slow Flying (LSF) aircraft and Fast Attack Craft (FAC) / Fast Inshore Attack Craft (FIAC) threaten U.S. strategic goals and can produce unacceptable losses of men and material. The SEA-18B team presents an operational concept for a family of Unmanned Surface Vessels USV) capable of defending ships from asymmetric swarm attacks. This USV, the Tailorable Remote Unmanned Combat Craft (TRUCC), can operate in concert with the next generation of capital surface vessels to combat this critical threat with maximum efficiency. Critical performance criteria of the TRUCC family were determined through agent-based simulation of a Straits of Hormuz Design Reference Mission. Additional models addressed ship synthesis and operational availability. A Technology and Capability Roadmap outlines areas of interest for investment and development of the next-generation USV. Interim technology and capability milestones in the Roadmap facilitate incremental USV operational capabilities for missions such as logistics...

A comparison of the National Training Center and the JANUS (T) combat model battle results

Gardner, John P.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
27.719321%
This thesis compares the weapon systems losses experienced at the National Training Center (NTC) with weapon systems losses in the high resolution combat model JANUS (TRASANA) for the Defend in Sector battle scenario at the Siberia location of the NTC. The scenario is fought between a United States Army Battalion Task Force against a Soviet Motorized Rife Regiment. The comparison was conducted at both the aggregate and individual weapon system level. The comparison showed that the JANUS (T) model results in a higher number of losses for both the red and blue forces than was observed at the NTC. Additionally, the comparison showed that red force BMP weapon system and the blue force TOW weapon system (both wire guided anti-tank missile platforms) to be much more lethal in the JANUS (T) model than was observed at the NTC. Keywords: Direct Fire; Army training; Military doctrine; These

Violência, saúde e rede de atenção: a experiência do Fórum Comunitário de Combate à Violência; Violence, health and care network: the experience of the Communitarian Forum on Combat Violence

Llanos, Rosalina Maria Caputo
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 09/06/2015 Português
Relevância na Pesquisa
27.232783%
Problema de saúde pública de prevalência na América Latina, a violência é uma realidade que atinge às sociedades desde o inicio mesmo da história da humanidade, gerando danos físicos e emocionais, desestabilização politica, econômica e social e milhares de perdas humanas. O crescimento exacerbado das violências, sobretudo nos grandes centros urbanos, tem exigido cada vez mais aos governos e às sociedades formular propostas de intervenção e atenção para reduzir seus impactos e atender às vítimas. Uma resposta a esta questão foi o caso do Fórum Comunitário de Combate à Violência, instancia não-governamental que funciona em Salvador. É assim como este projeto propõe realizar uma aproximação etnográfica ao Fórum, visando analisar o processo de gestão e mobilização deste, o aspecto intersetorial inerente a ele, a participação do movimento popular da região e as ações desenvolvidas para além do escopo central de atuação das intervenções. Para isto, foram realizadas entrevistas semiestruturadas aos gestores desta iniciativa e acompanhei algumas atividades por ali se realizam.; Public health problem of prevalence in Latin America, violence is a reality that reaches to societies even from the beginning of human history...

Optimal commitment of forces in some Lanchester-type combat models

Taylor, James G.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Relatório
Português
Relevância na Pesquisa
37.77331%
This paper shows that one can determine whether or not it is beneficial for the victor to initially commit as many forces as possible to battle in Lanchester-type combat between two homogeneous forces by considering the instantaneous casualty-exchange ratio. It considers the initial-commitment decison as a one-sided static optimization problem and examines this nonlinear program for each of three decision criteria (victor's losses, loss ratio, and loss difference) and for each of two different battle-termination conditions (given force-level breakpoint and given force-ratio breakpoint) . The paper's main contribution is to show how to determine the sign of the partial derivative of the decision criterion with respect to the victor's initial force level for general combat dynamics without explicitly solving the Lanchester-type combat equations. Consequently, the victor's optimal initialcommitment decision many times may be determined from how the instantaneous casualty-exchange ratio varies with changes in the victor's force level and time. Convexity of the instantaneous casualty-exchange ratio is shown to imply convexity of the decision criterion so that conditions of decreasing marginal returns may be identified also without solving the combat equations. The optimal initial-commitment decision is shown to be sensitive to the decision criterion for fixed force-ratio breakpoint battles.; supported by the Foundation Research Program of the Naval Postgraduate School with funds provided by the Chief of Naval Research; http://archive.org/details/optimalcommitmen00tayl; N0001477WR70044

An analysis of the Tactical Unmanned Vehicle during Amphibious Assault Combat Operations using the JCATS combat model

America, John F.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xviii, 68 p.
Português
Relevância na Pesquisa
27.43012%
Approved for public release; distribution is unlimited; The Unmanned Ground Vehicle/System Joint Project Office is currently developing a family of untanned ground systems that may have the potential to give the ground combat commander the ability to gain a decisive advantage in the battle for information dominance. By harnessing the power of robotics in a reconnaissance, surveillance and target acquisition role, the UGV is designed to provide the maneuver battalion commander with the ability to extend his influence beyond the capabilities of traditional scouts. This thesis examined the Unmanned Ground Vehicle Medium (UGVM) using the Joint Conflict and Tactical Simulation (JCATS) model to evaluate the impact of changes to performance characteristics of the system. The scenario used for the simulation was based on Exercise KERNEL BLITZ (KB), a biennial joint amphibious operation conducted on the West Coast of the United States. The UGVM's communication limitations and speed were varied in the JCATS simulations. Measures of effectiveness (MOEs) for these changes included total blue detections, blue detections over time, total blue kills, and blue losses over time.; http://www.archive.org/details/analysisoftactic00amer; Captain, United States Marine Corps .

Fitting firepower score models to the battle of Kursk data

Gozel, Ramazan
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xxx, 156 p.;28 cm.
Português
Relevância na Pesquisa
27.551558%
Approved for public release; distribution is unlimited.; This thesis applies several Firepower Score attrition algorithms to real data. These algorithms are used in highly aggregated combat models to predict attrition and movement rates. The quality of the available historical data for validation of attrition models is poor. Most accessible battle data contain only starting sizes and casualties, sometimes only for one side. A detailed database of the Battle of Kursk of World War II, the largest tank battle in history, has recently been developed by Dupuy Institute (TDI). The data is two-sided, time phased (daily), highly detailed, and covers 15 days of the campaign. According to combat engagement intensity, three different data sets are extracted from the Battle of Kursk data. RAND's Situational Force Scoring, Dupuy's QJM and the ATLAS ground attrition algorithms are applied to these data sets. Fitted versus actual personnel and weapon losses are analyzed for the different approaches and data sets. None of the models fits better in all cases. In all of the models and for both sides, the Fighting Combat Unit Data set gives the best fit. All the models tend to overestimates battle casualties, particularly for the Germans; http://www.archive.org/details/fittingfirepower00goze; First Lieutenant...

A Mental Simulation-Based Decision-Making Architecture Applied to Ground Combat

Kunde, Dietmar; Darken, Christian J.
Fonte: Escola de Pós-Graduação Naval Publicador: Escola de Pós-Graduação Naval
Português
Relevância na Pesquisa
37.551558%
At last year's BRIMS conference, we described a model of mental simulation based on statistical event prediction (Kunde and Darken, 2005). In this paper, we describe a new decision making architecture based on our mental simualtion model. We have developed and tested the model using a scenario built in COMBAT XXI, where the model is used to make fire/hold fire decisions. While the choice of what it to be predicted and the basis for the predictions are chosen by a human modeler, the details of the predictive models are constructed by machine learning based on actual simulation data. Three different predictive models are used to support the decision, one for target richness, one for the effects of obscuring terrain, and one for losses. The outputs of the prediction are integrated by a decision component, which is currently implemented by a decision tree. Preliminary experimental results indicate that the predictive ability of the model and the resulting fireing behavior are similar to human performance.

Agent based simulation as an exploratory tool in the study of the human dimension of combat

Brown, Lloyd Philip.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xxvi, 150 p.;28 cm.
Português
Relevância na Pesquisa
27.43012%
War is a human phenomenon and the essence of war is a clash between human wills Ref. 10. The Marine Corps is applying complexity theory to study the human dimension of land warfare with the agent based combat simulation Irreducible Semi-Autonomous Adaptive Combat (ISAAC), developed by Andrew Ilachinski. ISAAC is designed to allow the user to explore the evolving patterns of large unit behavior that result from the collective interactions of individual agents. An urban and a desert scenario were developed to explore command and control issues with ISAAC. Utilizing a personal computer and the Maui High Performance Computer Center, approximately 750,000 ISAAC runs were completed. The data are analyzed and graphically displayed using S-Plus generated Design and Trellis plots. The ISAAC data suggest there is some optimal balance between a commander's propensity to move towards the objective and his propensity to maneuver to avoid the enemy in order to minimize time to mission completion and friendly losses. Also, the data suggest that friction can significantly influence the battlefield but a strong commander-subordinate bond can reduce the effect. In addition, this exploration also demonstrates that fractional factorial designs provide almost as much information from ISAAC as full factorial designs with only a fraction of the runs; http://www.archive.org/details/agentbasedsimula00brow

An exploration of unmanned aerial vehicles in the Army's future combat systems family of systems

Sulewski, Charles A.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xxvi, 156 p. : col. ill., col. maps ;
Português
Relevância na Pesquisa
26.856055%
Unmanned aerial vehicles (UAVs) will be a critical part of the U.S. Army's Future Force. The Future Force will be a highly mobile, network enabled family of systems with integrated sensors and precision munitions. The Future Force will rely heavily on UAVs to provide eyes on the battlefield. These eyes will trigger the deployment of precision munitions by other platforms, and possibly by UAVs themselves. To provide insight into how the numbers and capabilities of UAVs affect a Future Force Combined Arms Battalionâ s (CABâ s) ability to secure a Northeast Asia urban objective, a simulation was built and analyzed. 46,440 computational experiments were conducted to assess how varying the opposing force and the numbers, tactics, and capabilities of UAVs affects the CABâ s ability to secure the objective with minimal losses. The primary findings, over the factors and ranges examined, are: UAVs significantly enhance the CABâ s performance; UAV capabilities and their tactics outweigh the number of UAVs flying; battalion level UAVs, especially when armed, are critical in the opening phases of the battle, as they facilitate the rapid attrition of enemy High Pay-off Targets; and, at least one company level and a platoon level UAV enhances dismounts survivability later in the battle.

Analyzing the effects of Urban combat on daily casualty rates

Yazilitas, Hakan
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xviii, 75 p. : ill. (some col.) ;
Português
Relevância na Pesquisa
27.232783%
Approved for public release; distribution is unlimited; This study explores whether the attacker's daily casualty rate (DCR) changes according to the terrain. The data set is a part of a larger database, Division Level Engagement Database from the Dupuy Institute. There are data on 253 battles, 96 of which occurred in urban areas. All the engagements are selected from European Theater of Operation (ETO) in World War II. The available data set contains measurements about the battles like initial strengths, daily casualties, terrain, front width, linear density, attacker's and defender's country, and armor losses. Hypothesis tests are used to find if the DCR is different in urban operations. A linear regression model is constructed to predict outcomes of similar engagements and to see the effect of each variable. It is concluded that the attacker's daily casualty rate is, on average, lower in urban operations. Terrain and force ratio are the most effective drivers of the daily casualty rate. In addition, it is seen that allied forces (U.S., U.K. and Canada) had a different approach to Military Operations on Urban Terrain than Soviet and German forces. The Allies used extensive combat power in urban operations.; First Lieutenant, Turkish Army

An examination of the USMC Combat Active Replacement Factor (CARF) determination system

Lindsay, Glenn F.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Relatório
Português
Relevância na Pesquisa
58.03809%
Combat Active Replacement Factors, or CARFs, are logistics planning factors currently used by the U.S. Marine Corps as estimates of equipment losses in future conflicts. Adapted Army replacement factors are currently a prime source for CARF values, but verification of these values is difficult. This report examines two alternate means of estimating CARF values for comparative purposes. The first employs mean-time-to-loss estimates for various equipment types, and several scenario-oriented models are given for mapping these values into CARFs. Professional military judgement provides another way of estimating CARF values, and a procedure is given by which the judgment of many experts can be aggregated to provide CARF information. A demonstraction of the procedure is given, employing actual data from twenty-three judges who rated 'chance of loss' for twenty-one equipment types. Keywords: Replacement factor, combat losses, scaling; Naval Postgraduate School, Monterey, CA; http://archive.org/details/examinationofusm00lind; NA

Reforming Insolvency Systems in Latin America

Rowat, Malcolm
Fonte: World Bank, Washington, DC Publicador: World Bank, Washington, DC
Tipo: Publications & Research :: Viewpoint; Publications & Research
Português
Relevância na Pesquisa
26.856055%
The note shares conflicting interests hampering insolvency systems reform in Latin America, and aims at assessing legal weaknesses, to propose some common solutions. Most insolvency systems share two prime objectives: allocating risk among participants in the economy, in a predictable, equitable and transparent way, and, maximizing the value of the insolvent firm for the benefit of all interested parties, and the broader economy. However, current regional problems reflect too rigid and formal insolvency laws; very high degrees of judicial discretion, increasing uncertainty, and financial risks; rampant corruption; absence of enforcement mechanisms to protect creditor interests; and, a powerful, explicit bias in favor of labor claimants, who are highly protected under preferential treatment. The note proposes a common set of essential reforms, to be prioritized according to each county's circumstances. First, disclosure of behind-the-scene dealings should be required, incentives created to combat corruption...